WO2017174131A1 - Verdichtereinheit und verfahren zum betreiben einer verdichtereinheit - Google Patents
Verdichtereinheit und verfahren zum betreiben einer verdichtereinheit Download PDFInfo
- Publication number
- WO2017174131A1 WO2017174131A1 PCT/EP2016/057538 EP2016057538W WO2017174131A1 WO 2017174131 A1 WO2017174131 A1 WO 2017174131A1 EP 2016057538 W EP2016057538 W EP 2016057538W WO 2017174131 A1 WO2017174131 A1 WO 2017174131A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compressor
- function
- spool
- screw
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/10—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
- F04C28/12—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/18—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/19—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/60—Prime mover parameters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
Definitions
- the invention relates to a compressor unit comprising a screw compressor with a compressor housing, with a screw runner space arranged in the compressor housing, at least one in the
- Compressor housing arranged high-pressure chamber to a final volume compressed outputs, and at least one in a slide channel of the
- Compressor housing arranged and adjacent to the screw rotor spool, which in a direction parallel to the
- Screw rotor axis is movable and the end volume and / or the initial volume is formed influencing.
- the invention is therefore based on the object to improve a compressor unit of the type described above such that it can be used with as little functional know-how regarding the functional relationships of the screw compressor.
- This object is achieved in a compressor unit of the type described above according to the invention in that on the screw compressor a compressor operation control unit is provided, which is designed so that it performs at least one operation of the compressor unit supporting compressor operation function.
- Compressor support that is, individual, take over the operation of the compressor important functions, so that the compressor unit can be used with less external effort in a plant.
- compressor units are provided for compressing refrigerant in refrigeration circuits of refrigeration systems, wherein such refrigeration systems are usually provided with a complex control.
- the present inventive solution thus simplifies and / or facilitates the installation of such refrigeration systems, since the manufacturer of refrigeration systems in the system control is no longer forced to realize the entire complex functional relationships for such a compressor unit, if the compressor unit already has such functional relationships by means of the compressor operation control unit realized.
- the advantage of this solution is the fact that the detection of at least one or more of these functional parameters makes it possible to obtain sufficient information about the respective operating state of the screw compressor, so that the complex functional relationships in a screw compressor can be detected in a simple manner.
- Function parameter is compared with at least one reference parameter and if a warning message and / or a shutdown of the screw compressor when exceeding or falling below the at least one reference parameter takes place.
- a protective function has the advantage that thus the operation of the compressor unit can be performed safely without external
- Units or external functional modules, for example in the plant control, are required to ensure the safe operation of the screw compressor.
- Screw compressors to compare where the application limits of the deployment diagram are simultaneously reference values for pressure and / or temperature on the inlet side and the outlet side, so that for example it can be ensured that the screw compressor is operated within its operating limits.
- the protective function for example, to detect the lubricant temperature and in particular to compare with one or an upper and a lower reference value in order to ensure adequate lubrication.
- a further advantageous embodiment of the compressor unit according to the invention provides that the at least one compressor operating function is a control function and that in particular for performing the control function at least one of the units such as a spool drive for the spool, an engine control, a lubricant cooling, and an injection element for compressed Medium for additional cooling, is controlled.
- the at least one compressor operating function is a control function and that in particular for performing the control function at least one of the units such as a spool drive for the spool, an engine control, a lubricant cooling, and an injection element for compressed Medium for additional cooling, is controlled.
- a motor control can be controlled in order to specify in particular the speed of the screw rotor can.
- control function could take place independently of the request signals and / or function parameters, for example only according to one or more specifications.
- the at least one compressor operating function to be an operating state specification function in which an execution of a control function takes place on the basis of at least one request signal and / or at least one function parameter.
- a further advantageous solution provides that the compressor operating function is an operating state monitoring function and that, in particular for carrying out the operating state monitoring function, a recording of the execution of at least one parameter detection function and / or at least one protective function and / or at least one control function takes place.
- Such a recording of the compressor operating functions makes it possible to monitor their operating states during the entire operation of the compressor unit according to the invention and also to recognize short-term excesses of the respective permissible operating states or to detect overshoots of the respective limits in a deployment diagram.
- the operating state monitoring function has the further advantage that in the case of faults there is an easy way of determining the cause of the fault on the basis of the recorded compressor operating functions.
- the compressor operation control unit is provided with a communication unit for exchanging data with external devices.
- Such an exchange of data with external devices would be, for example, an exchange of data with a system controller or an exchange of data with a visualization and / or operating unit, the
- the communication unit is designed so that it exchanges the data wired and / or wireless, so that the data communication with the compressor operation control unit is simplified.
- the Verêtr istungs- unit is provided with a visualization unit, which displays at least one execution state of at least one compressor operating function or its result, so that so that the compressor operating functions can be monitored in a simple manner.
- a further advantageous solution provides that the screw compressor has a control housing in which the Ver Whyr ists Kunststoffungs- unit is arranged.
- Compressor operation control unit must be made. It is particularly advantageous if the control housing on the
- Compressor housing is arranged.
- a screw compressor comprises a compressor housing having a screw runner space disposed therein, two in the
- a position detection device is provided for the at least one spool that the position detection means comprises a coupled to the at least one spool position indicator that the at least one position indicator cooperates with a detector element, which extends parallel to the direction of displacement of the control slide and along which the position indicator is movable when moving the at least one control slide, and that the detector element is coupled to an evaluation device which detects the respective position of the position indicator along the detector element.
- a Positionser linears- device is provided for the two spool, which one with the first spool coupled first position indicator and coupled to the second spool second position indicator comprises that both position indicators cooperate with a common detector element which extends parallel to the direction of displacement of the spool and along which the position indicators are movable when moving the spool, and that the detector element with an evaluation coupled, which is the respective
- the detector element is arranged in a running within the compressor housing parallel to the direction of displacement detector channel, so that the detector element by the
- Detector channel inside the compressor housing is optimally protected by external influences.
- the detector channel is closed by a lid, so that over the lid easy access to the
- the detector channel is formed by a groove-like recess formed in a housing base body, which engages over the lid.
- Another advantageous solution provides that the cover itself has a groove-like depression contributing to the detector channel.
- an advantageous solution provides that the detector element can be located within the
- Deepening of the lid extends, so that the detector element is removable together with the lid and optionally interchangeable.
- the at least one position indicator element is arranged in the detector channel and is movable in the latter in the displacement direction.
- the at least one position indicator is mechanically coupled via a connecting body with the respective control slide and thus the position indicator is rigidly carried along with the respective control slide.
- the respective connecting body has an elongate passage between the detector channel and a nozzle
- the respective position indicator element cooperates contactlessly with the detector element, so that the position detection of the position indicator elements can take place wear-free.
- the detector element is made of a magnetostrictive material and the position indicator generates at its location a local magnetic flux of the detector element, which can then be detected via the evaluation circuit in the detector element.
- a particularly favorable solution provides a Ver Whyr ists intervieweds- unit, which controls a spool drive for the respective spool and detected by the position detection unit, a movement of the respective spool.
- the compressor operation control unit is capable of not only moving the respective spool with the spool drive, but also accurately tracking the executed movement.
- the spool drive is realized as a pressurizable by a medium cylinder arrangement.
- the compressor operating control unit can be used particularly advantageous if it positions the respective control slide position-controlled.
- the compressor operation control unit on the one hand controls the spool drive and on the other hand can detect by detecting the position of the respective spool, whether the desired position is reached or not and then accurately approach this position by appropriate further control of the spool drive and, for example, hold permanently.
- the compressor operating control unit taking into account at least one or more of the parameters, such as: pressure level on the inlet side, especially at low pressure, pressure level on the outlet side, especially at high pressure, temperature of the gaseous medium on the inlet side, in particular at low pressure , Temperature of the gaseous medium on the outlet side, in particular at high pressure, speed of the screw rotor, power consumption of
- first spool and the second spool are arranged in the same direction one behind the other lying.
- two successive control spool are used so that the first spool and the second spool are in a composite position immediately adjacent to each other positionable and movable together in the direction of displacement.
- the first and the second spool can be positioned in a release position at a distance from each other to form a gap.
- first spool valve to have adjoining spool compression wall surfaces, one of which faces one of the screw rotors and the second spool valve has spaced-apart compaction wall surface areas, of which, in each case one to one of
- the first spool is mounted on the second spool.
- the first spool is mounted in a slide channel of the second spool.
- the Schieberverdichtungs- wall surfaces of the first spool and the Schieberverdichtungswand- surfaces of the second spool connect to each other.
- the first control spool and the second control spool have an identical outer contour.
- the two successive control slide advantageously be used so that the first spool and the second spool in a composite position immediately following one another are positioned and movable together in the direction of displacement.
- Distance apart from each other to form a gap can be positioned.
- the invention relates to a compressor unit comprising a
- Screw compressor with a compressor housing, with a in the
- Compressor housing arranged screw runner space, at least one arranged in the screw rotor space and rotatably mounted on the compressor housing about a screw rotor axis screw rotor which receives via a arranged in the compressor housing low-pressure chamber supplied gaseous medium having an initial volume and in the region of a compressor housing arranged in the high-pressure chamber to a final volume compacts, and at least one arranged in a slide channel of the compressor housing and adjacent to the screw rotor spool, which in a direction parallel to the
- Screw rotor axis is moved, and the final volume and / or the initial volume is affected, according to the invention on the screw compressor, a compressor operation control unit is provided, with which an operation of the compressor unit supporting compressor operating function is performed.
- the at least one compressor operating function is a parameter detection function and that in particular for the execution of the parameter detection function at least one of the function parameters such as:
- Lubricant level in at least one lubricant feed is Lubricant level in at least one lubricant feed
- a further advantageous variant of the method provides that a further compressor operating function is a protective function, that at least one parameter detection function is performed to execute the protective function and the at least one function parameter is compared with at least one reference parameter and that when the at least one reference parameter is exceeded or undershot Warning message and / or a shutdown of the screw compressor takes place.
- An expedient variant of the method provides that the at least one compressor operating function is a control function and that in particular for carrying out the control function at least one of the units such as: a spool drive,
- the at least one compressor operating function is a Radiosvorgebe- function, in which on the basis of at least one request signal and / or at least one function parameter execution of a control function.
- the compressor operating function is an operating state monitoring function and that, in particular for carrying out the operating state monitoring function, recording the execution of at least one parameter detection function and / or at least one protective function and / or at least one
- a variant of the method is designed such that the recording of the at least one functional parameter and / or the
- the compressor operation control unit is provided with a communication unit which exchanges data with external devices, wherein the communication unit exchanges the data in particular wired and / or wireless. Moreover, it is favorable in a variant of the method, if the
- Compressor operation control unit with at least one visualization unit displays at least one execution state of at least one compressor operating function or its result.
- Fig. 1 is a perspective view of a first embodiment of a screw compressor according to the invention
- Fig. 2 is a section along line 2-2 in Fig. 1;
- FIG. 3 shows a section along line 3-3 in the region of a position detecting device
- Fig. 4 is an enlarged section similar to FIG. 2 in the region of
- FIG. 5 shows a representation similar to FIG. 4 at maximum delivery volume and largest volume ratio
- FIG. 6 is a view similar to FIG. 4 at about three quarters of the
- FIG. 4 Power; a representation similar to FIG. 4 at about half the power; a representation similar to Figure 4 at about a quarter of the power.
- FIG. 12 at the highest volume ratio and lowest power
- FIG. 12 representation similar to FIG.
- FIG. 16 is a view similar to FIG. 15 a second Auscutin
- FIG. 17 shows a representation similar to FIG. 15 of a third embodiment of a compressor unit.
- FIG. 1 illustrated first embodiment of a screw compressor 10 according to the invention comprises a designated as a whole by 12
- Compressor housing which has a suction port 14, via which a gaseous medium to be sucked, in particular refrigerant, is sucked in and a pressure port 16, via which the high-pressure compressed gaseous medium, in particular the refrigerant, is discharged.
- a screw rotor axis 22, 24 rotatable screw rotor 26, 28 are provided in a screw rotor chamber 18 of the screw contours 32 and 34 engage with each other and with circumferentially adjacent compression walls 36 and 38 of the screw rotor - Collaborate space 18 to receive a supplied to the screw contours 32, 34 adjacent low pressure chamber 42 gaseous medium to compress and deliver it into a high pressure chamber 44 in the compressor housing 12 at high pressure.
- an adaptation of the operating state of the screw compressor 10 takes place on the one hand with regard to the volume ratio, which indicates the relation between the maximum enclosed intake volume and the ejected final volume, and secondly with regard to the compressor capacity, which indicates the proportion of the volume flow actually compressed by the screw compressor relative to the maximum volume flow which can be compressed by the screw compressor 10.
- a first spool 52 and a second spool 54 are arranged one after the other in a spool passage 56 provided in the compressor housing 12, the spool passage 56 being parallel to the screw spindles 22, 24 and the first spool 52 and the second spool 54 in the region of their not on the screw rotors 26, 28 adjacent guide circumferential surface 58 leads.
- the first spool 52 is facing the high pressure chamber 44 and thus arranged high pressure side and the second spool 54 is disposed relative to the first spool 52 on the low pressure side.
- Each of the two spools 52 and 54 further includes a spool valve wall 62 contiguous with the screw rotor 26 and a spool valve wall 64 contiguous with the screw rotor 28, which are partial surfaces of the compression panels 36 and 38, and casing compression panels 66 and 68 formed by the compressor housing 12 also Partial surfaces of the Verdichtungswanddon 36 and 38, supplementing the Verdichtungswanddon 36 and 38, which contribute together with the screw contours 32 and 34 to form the compression chambers.
- the first spool 52 and the second spool 54 are formed so as to be identical insofar as they form the spool compression wall surfaces 62 and 64 and the guide peripheral surface 58, and thus they can be combined in one parallel to the
- Screw rotor axes 22, 24 extending displacement direction 72 are slidably guided in the slide channel 56 of the compressor housing 12.
- the first spool 52 forms a high pressure chamber 44 facing the final volume of the compression chambers defining outlet edge 82 which is displaced by moving the first spool 52 in the displacement direction 72 and by their position relative to a high pressure side end face 84 of the screw rotor chamber 18, the final volume the compaction chambers formed and thus determines the volume ratio.
- the first spool 52 and the second spool 54 have facing end surfaces 86 and 88, with which these, as shown for example in FIG. 4 and Fig. 5, are so applied to each other, that the Schieberverdichtungswand vom 62 and 64 of the first spool 52 and the second spool 54 merge into each other.
- first spool 52 and the second spool 54 are guided in addition to the slide channel 56 relative to each other by a telescopic guide 92, which has an inner guide body 94 and a
- Guide receptacle 96 wherein the guide receptacle 96 in the first spool 52 is provided and the guide body 94 is held on the second spool 54 and protrudes beyond the end surface 88 so that it can engage in the guide receptacle 96 in the first spool 52.
- a compression spring 104th preferably in a surrounding the guide body 94 interior 102 of the second spool 54 is a compression spring 104th
- a spool drive for example, designed as a cylinder assembly 112
- the cylinder assembly 112 comprises a cylinder chamber 114 and a piston 116 and wherein the piston 116 is connected to a piston rod 118, which makes a connection to the first spool 52, for example, with an extension 122 of the first spool 52, which is arranged, for example, on one of the end face 86 opposite side of the same.
- the cylinder arrangement 112 lies in particular on a side of the first control slide 52 opposite the second control slide 54, preferably in a high-pressure-side housing section 124 of FIG
- Compressor housing 12 which is arranged following the slide channel 56 and subsequent to the high-pressure chamber 44 and thus on a side opposite the low-pressure chamber 42 side of the compressor housing 12.
- the second spool 54 is displaceable by a spool drive, for example formed as a cylinder assembly 132, wherein the
- Cylinder assembly 132 includes a piston 136 movable in a cylinder chamber 134 and wherein the cylinder chamber 134 is in particular in Continuation of the slide channel 56 extends in a low-pressure side housing portion 142, in which drive-side bearing units for the screw rotors 26 and 28 are arranged, which are driven for example via a drive shaft 144.
- the piston 136 is integrally formed on the second spool 54 and has a piston surface which corresponds at least to the cross-sectional area of the second spool 54.
- the low-pressure side housing portion 142 which receives the cylinder chamber 134 for the cylinder assembly 132 for moving the second spool 54, is located in a region of the compressor housing 12, which is the high-pressure side housing portion 124 arranged to receive the cylinder chamber 114 for the cylinder assembly 112 opposite.
- the first spool 52 and the second spool 54 can be pushed together by the cylinder assemblies 112 and 132 so far that the end faces 86 and 88 abut each other in a composite position, and the two spools 52, 54 can be in the compound position together as a single spool move, which extends from the suction-side end surface 126 in the direction of the pressure-side end surface 84 and the outlet edge 82 contributes to the determination of the volume ratio, wherein, as shown in Fig. 4, the screw compressor 10 always promotes the maximum volume flow in this composite position.
- the volume ratio can be adjusted, which becomes progressively smaller
- the outlet edge 82 has the minimum distance from the end surface 84 or even beyond this into a retraction space 146 for the high-pressure space 44 the first spool 52 is shifted, a variation of the initial volume 86 is possible without changing the final volume, since this then always remains minimal.
- the second spool 54 thus allows to influence the initial volume by either abutting it with its end face 88 on the end face 86 of the first spool 52, either to form the composite position of the spool 52, and thus maximizing the initial volume or with its own end face 88 so far away from the end face 86 of the first spool 52 can be moved away that no
- position detecting means For detecting the positions of the first spool 52 and the second spool 54 is a designated as a whole by 152 position detecting means is provided, which is parallel to the displacement direction 72 of the spool 52, 54 and thus parallel to the screw rotor axes 22, 24 extending Detector element 154, which is able to detect the positions of position indicators 156 and 158.
- the position indicator member 156 is fixedly coupled to the first spool 52, with an adjoining the end face 86 end portion 162 of the first spool 52, and the position indicator 158 is coupled to the second spool 54, with a to the end face 88 subsequent end portion 164 thereof, as shown in particular in Fig. 9.
- each of these position indicators 156 and 158 includes a fork body, generally designated 174, which has its two fork legs 176 and 178 located therebetween
- Each of these fork bodies 174 is coupled to the corresponding control slide 52, 54 via a connecting body 172 connected to the respective end region 162 or 164.
- the fork legs 176 and 178 carry magnets 184 and 186, whose magnetic field flows through the detector element 154 at the location of the magnets 184, 186.
- the detector element 154 is formed from a magnetostrictive material, so that the respective location 188 of the magnetic flux of the detector element 154 can be determined by the magnets 184, 186 by means of an evaluation device designated as a whole by 192, the evaluation device 192 for example in the magnetostrictive detector element 154 Sound waves generated by the magnetic fields of the magnets 184, 186 flooded places 188 undergo a back reflection, so that the evaluation 192 can determine the location of the locations 188 in which the magnetic flux of the magnetostrictive detector element 154, due to the duration of the reflected sound waves ,
- the evaluation device 192 can determine the position POS1 of the first control slide 52 and the position POS2 of the second control slide 54 in the displacement direction 72 in the slide channel 56.
- the connecting bodies 172 which are held at the respective end portions 162, 164 of the spools 52, 54, pass through an elongate, slit-shaped passage 194, which is formed in a housing wall 196 forming the slide channel 56 and has a length which is complete in the disconnected position Retraction of the second spool 54 in the retraction 148 and a position of the first spool 52 at a minimum initial volume, ie a position corresponding to FIG. 8, and a position of the first spool 52 at minimum volume ratio, that is maximum distance of the outlet edge 82 of the pressure side
- End face 84 and also allows in the compound position, a position of the second spool 54 with the first spool 52 at maximum volume ratio and minimum volume ratio.
- Spool valve 52 and 54 connected connecting body 172 forms together with the slot-shaped passage 194 a rotation for the respective spool 52, 54 similar to a guide by a Sliding nut and a groove, so that eliminates the need to provide in the spools 52, 54 grooves, which cooperate with projecting into the slide channel 56 nuts.
- the passage 194 is always maintained at the pressure in the low-pressure chamber 42 and thus also serves to hold the spool 52, 54 with its guide circumferential surface 58 in abutment with the slide channel 56, so that the spool 52, 54 not by itself between the Slider channel 56 and the guide peripheral surface 58 forming high pressure with the Schieber- compacting panels 62, 64 can press against the screw rotor 26, 28.
- a depression 204 is provided on a side of a wall 196 of a housing base 198 opposite the slide channel 56, which is covered with a cover 212, which in turn has a recess 214 facing the depression 204, so that the recesses 204 and 214
- Displacement direction 72 extending elongated detector channel 216 form, in which on the one hand, the detector element 154 extends and in which the fork body 174 are movable on the other hand, with their fork legs 176, 178 surround the detector element 154 on both sides and the magnets 184, 186 position such that their magnetic field the detector element 154 is flooded at a particular location 188.
- the lid 212 is formed so that in the recess 214, the detector element 154 is located so that the detector element 154 together with the evaluation 192 held exclusively on the cover 212 and is removable with this, while the fork body 174 in the detector channel 216, in particular both in the recess 198 and in the recess 204, extend.
- the second spool 54 ' is in the spool passage 56 and is guided in this with its guide peripheral surface 58'. Further, the second spool 54 'forms outer spool compression wall surfaces 62' 2 and 64 ' 2 that immediately adjoin the casing compression walls 66 and 68, with the spool compression wall surface 62' 2 attached to the screw rotor 26 and the spool compression wall surface 64 ' 2 adjacent to the screw rotor 28.
- the second control slide 54 ' is designed in cross-section crescent-shaped, so that in turn forms a slide channel 236, in which the first spool 52' is guided with a guide circumferential surface 238.
- the spool compression wall surfaces 62 ' 2 and 64' 2 of the second spool 54 'and the spool compression wall surfaces 62 ⁇ and 64 ⁇ of the first spool 52' complement the casing compression panels 66 and 68 to the compression panels 36 and 38 surrounding the screw contours 32 and 34, respectively.
- the first spool 52 'further defines the outlet edge 82' which faces the high pressure space 44 and defines the end volume by its distance from the end surface 84 in a manner comparable to that of the first embodiment.
- the second spool 54 affects the initial volume by the position of inlet edges 242 of the spool compression wall surfaces 62 2 and 64 2, and more particularly their distance from the low pressure side end surface 126.
- the first spool 52 ' is controllable by a cylinder arrangement 132' arranged in particular on the suction side, in which case the piston 136 'is formed in one piece on the first spool 52' and movable in the cylinder chamber 134 ', while the second spool 54' can be controlled by a cylinder arrangement 112 'arranged in particular on the pressure side.
- Such a slide arrangement is known and, for example in the
- the positions of the first spool 52 'and the second spool 54' are detectable by the position detecting means 152, and also position indicators 156 and 158 are coupled to the first spool 52 'and the second spool 54', respectively admittedly via connection bodies 172 permanently connected to these control slides 52 'and 54', which pass through the passage 194 in the same way as in the first embodiment, so that the position indicator elements 156 and 158 in the detector channel 216 along the detector element 154 are movable and in the same manner as in the first embodiment, a detection of
- Positions of the position indicator elements 156 and 158 can be made via the evaluation device 192.
- the position indicators 156 and 158 are preferably formed in the same manner as in the first embodiment as a fork body 174 and provided with magnets 184 and 186.
- the screw compressors further include a lubricant supply system 260 which deposits lubricant from a flow of high-pressure compressed medium MH through a lubricant separator 262 from the screw compressor 10 a lubricant cooler 264 cools, filters in a lubricant filter 266 and then a lubricant connection 268 on the compressor housing 12 schematically shown in FIG.
- a lubricant supply system 260 which deposits lubricant from a flow of high-pressure compressed medium MH through a lubricant separator 262 from the screw compressor 10 a lubricant cooler 264 cools, filters in a lubricant filter 266 and then a lubricant connection 268 on the compressor housing 12 schematically shown in FIG.
- the lubricant supply is controllable by a controllable valve 272 associated with the lubricant supply system 260.
- a lubricant supply line 274 leads to a plurality of lubricant inlets 282, 284, 286, 288 the lubrication points of the screw compressor 10, for example formed by a shaft seal 292 of the drive shaft for the screw rotors 26, 28, low-pressure side bearings 294 for the screw rotors 26, 28, a Lubricant injection 296 for the screw rotors 26, 28 and high pressure side bearings 298.
- lubricants for operating the cylinder arrangements 112 and 132 can also be branched off from the lubricant supply line 274, since the lubricant is under high pressure.
- the lubricant supply system 260 is also characterized by a
- Lubricant sensor SS monitors, for example, one of the lubricant inlets 282, 284, 286, 288, in this case associated with the lubricant inlet 282.
- the lubricant sensor SS is designed as an optical lubricant presence sensor and detects the presence of lubricant, for example in the lubricant inlet 282 representative and for the remaining lubricant inlets 284, 286, 288th
- a compressor operation function is a parameter detection function according to which, for example, the following function parameters by means of this
- the compressor operation control unit 240 detects the pressure PN of the gaseous medium to be compressed on the inlet side or the low-pressure side or the temperature TN of the gaseous medium to be compressed on the inlet side or the low-pressure side of the gas to be compressed by means of sensors arranged on the inlet side or low-pressure side
- the compressor operating control unit 240 detects the pressure PH of the compressed gaseous medium or the temperature TH of the compressed gaseous medium on the outlet side or the high-pressure side of the screw compressor 10 by means of sensors SPH and STH arranged on the exit side or on the high pressure side.
- the presence of lubricant is detected by the lubricant presence signal SP of the lubricant sensor SS transmitted to the compressor operation control unit 240, which is indicative of the functioning lubricant supply.
- the compressor operation controller 240 compares the function parameters detected in the parameter detection function with the
- Compressor operation control unit 240 predetermined reference parameters to detect whether an overrun or underrun of at least one of the reference parameters and this may be required to have a shutdown of the screw compressor result.
- the compressor operation control unit 240 compares the pressure PN and the temperature PN on the entrance side or the low pressure side and the pressure PH and the temperature TH on the exit side or the high pressure side with predetermined reference parameters, for example, reference limits defined by application limits of the screw compressor, and determines whether the screw compressor within the provided
- the compressor operating control unit 240 checks whether the lubricant presence signal SP is present and thus provides a sufficient supply of lubricant to the screw compressor 10.
- a movement of the spool 52, 54 to operate the screw compressor 10 in a certain operating condition in particular in a certain volume ratio and with a certain power to operate.
- the compressor operation control unit 240 proceeds from those detected by the connection to the position detector 152 and the evaluator 192 as part of the parameter detection function actual positions POS1 and POS2 of the spools 52, 54 to, due to the knowledge of these positions POS1 and POS2, the spools 52, 54 to move and hold the positions defined by the desired operating state.
- the cylinder assemblies 112 and 132 are controllable to position the spools 52, 54.
- controllable solenoid valves ML1 and ML2 are provided by the compressor operation control unit 240 in order to control the cylinder arrangement 112, and controllable solenoid valves MV1 and MV2 are provided in order to actuate the cylinder arrangement 132.
- control function As part of the control function as a compressor function controls the
- Compressor operation control unit 240 also still the lubricant supply through the lubricant supply system 260 by means of the controllable valve 272nd
- the compressor operation control unit 240 is also designed such that it can be connected to a control of a drive motor 300, in particular an electric motor, for driving the screw compressor 10 according to the invention, wherein the drive motor 300, for example, by a motor controller 302, comprising in particular a frequency converter is driven so that the drive motor 300 can not only be switched on and off but can be operated by the motor control 302 in a speed-controlled manner.
- a drive motor 300 for example, by a motor controller 302 comprising in particular a frequency converter is driven so that the drive motor 300 can not only be switched on and off but can be operated by the motor control 302 in a speed-controlled manner.
- the compressor unit according to the invention is operated by a system controller 310, which in particular in the case of the use of the screw compressor 10 according to the invention in a cooling circuit or refrigeration cycle the power demand of the compressor operation control unit 240 to the screw compressor 10 via a system controller 310, which in particular in the case of the use of the screw compressor 10 according to the invention in a cooling circuit or refrigeration cycle the power demand of the compressor operation control unit 240 to the screw compressor 10 via a
- the power demand is defined on the part of the system controller 310 on the one hand by the state variables of the guided to the screw compressor 10 current of the medium MN at low pressure and the screw compressor away leading current of the medium MH at high pressure, wherein for example in the in FIG. 15, the system controller 310 detects the pressure of the flow of the medium MN to low pressure by the pressure sensor ASPN and the temperature of the flow of the medium MN to low pressure by the temperature sensor ASTN.
- the plant controller 310 detects the pressure of the medium MH to high pressure by the pressure sensor ASPH and the temperature of the medium MH to high pressure by the temperature sensor ASTH.
- the system controller 310 determines a request signal AS, which transmits them via the communication unit 312 of the compressor operation controller 240.
- the compressor operation control unit 240 operates with another compressor operation function as the operation state setting function.
- the request quantity AS and / or one or more of the function parameters detected in the context of the parameter acquisition function are used to determine operating states and to achieve and maintain these operating states by executing at least one of the control functions.
- the compressor operation control unit 240 communicates with a visualization unit 322, which is, for example, able to display the functional parameters either as such or through graphical elements, such as bar or pie charts.
- the visualization unit 322 is also capable of further compressor operating functions, in particular with their functions
- Another compressor operating function is an operating state monitoring function in which the compressor operation control unit 240 records the execution of one or more compressor functions over time such that, for example, in the event of a failure, the detected function parameters and / or the executed protection functions and / or the executed control functions and / or or the operating conditions can be traced.
- FIG. 16 a second embodiment of a compressor unit according to the invention, shown in FIG. 16, those elements which are identical to those of the first embodiment are given the same reference numerals, so that in this respect the description thereof can be fully incorporated by reference to the explanations on the first embodiment.
- the vibration sensor SSW is not provided, and instead, the rotational speed signal DS is determined from the frequency at which the frequency converter of the motor controller 302 drives the drive motor 300.
- the drive motor 300 is still a temperature sensor STM
- phase angle of the drive motor 300 is also detected by the compressor operating control 240 '.
- the lubricant supply means 260 ' is a sensor STSM
- a flow sensor SSSM arranged, which detects the flow of the lubricant and generates a signal for the lubricant flow SSM, by means of which the lubricant flow in the lubricant supply means 260' of the
- Compressor operation control unit 240 ' can be detected.
- the sensor for the lubricant flow SSSM can also be designed as a differential pressure sensor.
- the pressure sensor SPSM l and SPSM2 are associated with the lubricant filter 266, with which a pressure applied to the lubricant filter 266 differential pressure A PSM can be determined, the Ver whor memoris horrungs- unit 240 'also detects this differential pressure A PSM.
- the lubricant cooling 264 is still controllable by a valve 332, which is also connected to the compressor operation control unit 240'.
- the screw rotors 26, 28 also have an injection 334 for compressed, high-pressure medium which is controllable by a valve 336, the injection of compressed and high-pressure medium into the compressor volumes enclosed by the screw rotors additional cooling of the screw rotors 26, 28 allows.
- the compressor operation controller 240 detects in addition to those associated with the first
- Embodiment explained parameters also the speed DS of the frequency converter of the motor controller 302, the phase position PL of the drive motor 300 and also the temperature TM of the drive motor 300th
- Compressor operation control 240 in particular also the temperature TSM of the lubricant in the lubricant supply means 260', the lubricant flow SSM, and the pressure drop A PSM on the lubricant filter 266 of the lubricant supply means 260 'detected.
- TSM temperature of the lubricant in the lubricant supply means 260'
- SSM lubricant flow SSM
- PSM pressure drop A PSM on the lubricant filter 266 of the lubricant supply means 260 'detected.
- Phase position PL of the drive motor 300 with the predetermined phase position that is the intended direction of rotation and a comparison of the temperature TM of the drive motor 300 with a reference value and, for example, in a deviation of the phase position PC of the predetermined phase position and / or when the reference value is exceeded by the temperature TM a shutdown of the drive motor 300 triggered by the motor controller 302.
- the temperature TSM of the lubricant is monitored and compared with a reference value in order to be able to detect an excessively high temperature of the lubricant.
- the lubricant flow SSM and / or the differential pressure APSM are detected at the lubricant filter 266 and compared with a reference value to detect, for example, whether the lubricant flow SSM is sufficient or too low and if, for example, the lubricant filter 266 is heavily contaminated, so that in this case a warning is given, for example displayed on the visualization unit 322.
- the drive motor 300 ' is in the third embodiment of the compressor unit
- Compressor housing 12 integralated and flows around, for example, for cooling of the input side stream of the medium MN at low pressure before it is compressed by the screw rotor 26, 28.
- the frequency converter with the motor control 302 ' can be arranged in any way on the compressor housing 12'.
- the frequency converter is integrated with the motor controller 302 'in the compressor housing 12' and thus constantly with the
- Compressor operation control unit 240 "connected so that the compressor operation control unit 240" can communicate permanently with the frequency converter and, for example, the frequency not only the speed DS of the drive motor 300, the phase position PL but in particular also the voltage UM on the drive motor 300 and the current consumption of IM Drive motor 300 gets transmitted.
- the compressor operation control unit 240 “functions in the same manner as described in connection with the above embodiments, particularly the first embodiment.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Claims
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23190380.8A EP4245997B1 (de) | 2016-04-06 | 2016-04-06 | Verdichtereinheit und verfahren zum betreiben einer verdichtereinheit |
| CN202510088992.6A CN119825703A (zh) | 2016-04-06 | 2016-04-06 | 压缩机单元和用于运行压缩机单元的方法 |
| EP16714454.2A EP3440357B1 (de) | 2016-04-06 | 2016-04-06 | Verdichtereinheit und verfahren zum betreiben einer verdichtereinheit |
| RU2018138286A RU2729967C2 (ru) | 2016-04-06 | 2016-04-06 | Компрессорный модуль и способ эксплуатации компрессорного модуля |
| PCT/EP2016/057538 WO2017174131A1 (de) | 2016-04-06 | 2016-04-06 | Verdichtereinheit und verfahren zum betreiben einer verdichtereinheit |
| CN201680084185.6A CN109072914B (zh) | 2016-04-06 | 2016-04-06 | 压缩机单元和用于运行压缩机单元的方法 |
| US16/152,079 US11460026B2 (en) | 2016-04-06 | 2018-10-04 | Compressor unit and method for operating a compressor unit |
| US17/894,860 US20220412357A1 (en) | 2016-04-06 | 2022-08-24 | Compressor unit and method for operating a compressor unit |
| US19/038,368 US20250172144A1 (en) | 2016-04-06 | 2025-01-27 | Compressor unit and method for operating a compressor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2016/057538 WO2017174131A1 (de) | 2016-04-06 | 2016-04-06 | Verdichtereinheit und verfahren zum betreiben einer verdichtereinheit |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US16/152,079 Continuation US11460026B2 (en) | 2016-04-06 | 2018-10-04 | Compressor unit and method for operating a compressor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017174131A1 true WO2017174131A1 (de) | 2017-10-12 |
Family
ID=55661467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2016/057538 Ceased WO2017174131A1 (de) | 2016-04-06 | 2016-04-06 | Verdichtereinheit und verfahren zum betreiben einer verdichtereinheit |
Country Status (5)
| Country | Link |
|---|---|
| US (3) | US11460026B2 (de) |
| EP (2) | EP3440357B1 (de) |
| CN (2) | CN119825703A (de) |
| RU (1) | RU2729967C2 (de) |
| WO (1) | WO2017174131A1 (de) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2713784C1 (ru) * | 2016-04-06 | 2020-02-07 | Битцер Кюльмашиненбау Гмбх | Винтовой компрессор (варианты) |
| EP3440357B1 (de) * | 2016-04-06 | 2023-09-06 | BITZER Kühlmaschinenbau GmbH | Verdichtereinheit und verfahren zum betreiben einer verdichtereinheit |
| CN111425396B (zh) * | 2019-01-09 | 2021-09-10 | 约克(无锡)空调冷冻设备有限公司 | 螺杆压缩机及其控制方法 |
| DE102020115442A1 (de) * | 2020-06-10 | 2021-12-16 | Bitzer Kühlmaschinenbau Gmbh | Schraubenexpander und Anlage zur Gewinnung elektrischer Energie aus Wärme mit einem Schraubenexpander |
| CN114109822B (zh) * | 2020-08-25 | 2023-11-14 | 精工爱普生株式会社 | 真空装置 |
| US12221963B2 (en) * | 2021-09-10 | 2025-02-11 | Hitachi Global Air Power Us, Llc | Compact variable volume index valve for screw compressor background |
| USD1121687S1 (en) * | 2024-08-14 | 2026-04-07 | Fujian Snowman Compressor Co., Ltd | Screw compressor |
| USD1120027S1 (en) * | 2024-08-14 | 2026-03-24 | Fujian Snowman Compressor Co., Ltd | Screw compressor |
| USD1122302S1 (en) * | 2024-08-14 | 2026-04-14 | Fujian Snowman Compressor Co., Ltd | Screw compressor |
| USD1120029S1 (en) * | 2024-11-19 | 2026-03-24 | Fujian Snowman Compressor Co., Ltd | Screw compressor |
| USD1120028S1 (en) * | 2024-11-19 | 2026-03-24 | Fujian Snowman Compressor Co., Ltd | Screw compressor |
| USD1122987S1 (en) * | 2024-11-19 | 2026-04-21 | Fujian Snowman Compressor Co., Ltd | Screw compressor |
| USD1113998S1 (en) * | 2024-11-19 | 2026-02-17 | Fujian Snowman Compressor Co., Ltd | Screw compressor |
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2016
- 2016-04-06 EP EP16714454.2A patent/EP3440357B1/de active Active
- 2016-04-06 CN CN202510088992.6A patent/CN119825703A/zh active Pending
- 2016-04-06 WO PCT/EP2016/057538 patent/WO2017174131A1/de not_active Ceased
- 2016-04-06 RU RU2018138286A patent/RU2729967C2/ru active
- 2016-04-06 EP EP23190380.8A patent/EP4245997B1/de active Active
- 2016-04-06 CN CN201680084185.6A patent/CN109072914B/zh active Active
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2018
- 2018-10-04 US US16/152,079 patent/US11460026B2/en active Active
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2022
- 2022-08-24 US US17/894,860 patent/US20220412357A1/en not_active Abandoned
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3440357B1 (de) | 2023-09-06 |
| EP4245997B1 (de) | 2026-04-29 |
| RU2018138286A3 (de) | 2020-05-12 |
| CN109072914A (zh) | 2018-12-21 |
| EP4245997A3 (de) | 2023-12-27 |
| CN119825703A (zh) | 2025-04-15 |
| RU2018138286A (ru) | 2020-05-12 |
| EP4245997A2 (de) | 2023-09-20 |
| EP3440357A1 (de) | 2019-02-13 |
| US11460026B2 (en) | 2022-10-04 |
| CN109072914B (zh) | 2025-02-14 |
| US20220412357A1 (en) | 2022-12-29 |
| US20250172144A1 (en) | 2025-05-29 |
| RU2729967C2 (ru) | 2020-08-13 |
| US20190032655A1 (en) | 2019-01-31 |
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