EP2674571B1 - Pumpenaggregat mit Flüssigkeitsringpumpe - Google Patents

Pumpenaggregat mit Flüssigkeitsringpumpe Download PDF

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Publication number
EP2674571B1
EP2674571B1 EP13171693.8A EP13171693A EP2674571B1 EP 2674571 B1 EP2674571 B1 EP 2674571B1 EP 13171693 A EP13171693 A EP 13171693A EP 2674571 B1 EP2674571 B1 EP 2674571B1
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EP
European Patent Office
Prior art keywords
pump
liquid
connection unit
connection
power unit
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.)
Active
Application number
EP13171693.8A
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German (de)
English (en)
French (fr)
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EP2674571A3 (de
EP2674571A2 (de
Inventor
Pierre Hähre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Speck Pumpen Vakuumtechnik GmbH
Original Assignee
Speck Pumpen Vakuumtechnik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Speck Pumpen Vakuumtechnik GmbH filed Critical Speck Pumpen Vakuumtechnik GmbH
Priority to SI201331748T priority Critical patent/SI2674571T1/sl
Priority to PL13171693T priority patent/PL2674571T3/pl
Publication of EP2674571A2 publication Critical patent/EP2674571A2/de
Publication of EP2674571A3 publication Critical patent/EP2674571A3/de
Application granted granted Critical
Publication of EP2674571B1 publication Critical patent/EP2674571B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • 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
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/001—General arrangements, plants, flowsheets
    • 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
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/004—Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply
    • 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
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/005—Details concerning the admission or discharge
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • 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
    • F04C28/02—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for several pumps connected in series or in parallel
    • 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
    • F04C29/04—Heating; Cooling; Heat insulation

Definitions

  • the present invention relates to a pump unit which comprises a liquid ring pump and a connection unit
  • Liquid ring pumps or compressors have been known for a long time and are used in a wide variety of process engineering processes. Examples include the use in plants for the production of plastics or pharmaceuticals, for beverage filling, for paper production, and the use in medical or food-grade sterilizers.
  • Liquid ring vacuum pumps or compressors work according to the displacement principle, whereby - in the most widespread design - a motor-driven, paddled impeller is arranged eccentrically in a pump housing, which has an interior with an essentially circular cross-section.
  • an operating fluid for example water
  • Adjacent blades of the impeller define chambers with the liquid ring and the hub of the impeller which, due to the eccentric bearing of the impeller, have a volume which is dependent on the angular position of the chamber, the liquid ring penetrating more or less deeply into the chamber and thereby acting like a displacement piston.
  • control means are provided in which openings, so-called suction and pressure openings, are left, through which the chambers communicate with the inlet and outlet of the pump.
  • the suction opening is located in the angular range in which the chamber volume is increased, while the pressure opening is arranged in the angular range with a decreasing chamber volume.
  • Liquid ring pumps are particularly suitable for pumping gases and vapors. To a certain extent, however, liquid flows can also be conveyed. In principle, when operating a liquid ring pump, a certain proportion of the operating liquid coming from the liquid ring is always discharged.
  • the operating fluid of the pump has three functions. On the one hand, as explained above, it acts as a piston of the displacement pump. In addition, it seals the individual chambers of the impeller against each other, so that oil-free delivery of the fluid to be delivered is possible.
  • the constant conveyance of part of the operating fluid also allows the heat of compression that occurs during operation to be removed. Operating fluid must therefore be supplied continuously so that the liquid ring is kept at a constant level.
  • Liquid ring vacuum pumps are widely used in one or two stages. Two-stage liquid ring pumps are used in applications that require relatively high vacuums. The two-stage liquid ring pump can reach final pressures, which are typically between 150 - 25 mm Hg.
  • the liquid ring pumps are part of more or less complex pump units, which in addition to the actual pump also include suction and pressure lines for the medium to be pumped, compressed air lines, liquid separators, liquid condensers, heat exchangers, etc.
  • Pump units of this type typically consist of individual components which are connected to one another via lines and are put together for the respective specific application.
  • Pumenaggregate are therefore relatively complicated and expensive in construction and can only be adapted to different tasks with great difficulty.
  • the maintenance of individual components of the pump unit is also labor-intensive, since numerous connections have to be removed and re-installed.
  • the present invention is therefore based on the technical problem of providing a pump unit that is simple and space-saving and that enables simple maintenance of the pump itself, in particular the liquid ring pump.
  • the invention accordingly relates to a pump unit which comprises a liquid ring pump and a connection unit, the liquid ring pump having a pump housing which surrounds a first working space which communicates with a suction opening for a fluid to be conveyed via a first control disk and in which a first, Impeller rotatably connected to a drive shaft is arranged eccentrically.
  • the pump unit according to the invention is characterized in that the pump is detachably connected to the connection unit and that the connection unit has a suction nozzle which communicates with the suction opening of the pump.
  • the invention accordingly proposes a modular pump unit, in which at least the suction line for the fluid to be pumped is not connected directly to the suction opening of the liquid ring pump, but to a connection unit to which the liquid ring pump can also be detachably attached and which is used for a communicating connection sucks between the intake port of the connection unit and the intake opening of the liquid ring pump.
  • the connection unit can have further additional modules, which can also be connected to the connection unit, if appropriate also releasably or not, and which are explained in more detail below.
  • connection unit can be a simple, plate-shaped module that is flanged, for example, to the end face of the pump housing of the liquid ring pump and, in addition to the suction port, has internal channels and an opening that lies above the suction opening of the liquid ring pump.
  • connection unit is preferably designed as a connection housing, the liquid ring pump being detachably mounted in the connection housing as a plug-in unit. This means that the liquid ring pump can simply be pulled out of the connection housing for maintenance work.
  • the liquid ring pump can be designed as an axial insertion unit, which is sealed axially or radially to the connection housing.
  • the pump housing preferably has an essentially cylindrical general shape.
  • the medium to be pumped is a gas / liquid mixture and / or after passing through the liquid ring pump, the medium still contains residual portions of the operating liquid of the pump.
  • the pump unit therefore has an integrated first liquid separator on the pressure side. By integrating the liquid separator into the pump unit, the pump unit can be made correspondingly compact.
  • the first liquid separator can be, for example, a cyclone separator.
  • the integrated first liquid separator is arranged in the connection unit.
  • the liquid separator can directly connect to the pressure opening of the liquid ring pump.
  • Such an embodiment is preferably used in a single-stage liquid ring pump, in particular in a single-stage liquid ring pump in a block design, in which the suction opening and the pressure opening are provided on the end face of the pump.
  • the integrated first liquid separator is arranged between the pump housing and a motor of the liquid ring pump driving the drive shaft.
  • Such an arrangement can be selected, for example, if the pressure opening is on the side of the suction opening opposite the impeller.
  • Such an arrangement can also be selected, for example, if a multi-stage, in particular a two-stage, liquid ring pump is used and the pressure opening of the second stage is oriented in the direction of the motor of the pump.
  • the integrated first liquid separator has at least one outlet opening for the fluid to be conveyed, which opens into an intermediate space provided in the connection unit.
  • This intermediate space can represent, for example, a connection between the first separator and a second, downstream separator.
  • this intermediate space can be a channel piece adjoining the first separator within the plate-shaped element.
  • the connection unit in particular if the connection unit is designed as a connection housing and at least partially surrounds the liquid ring pump designed as a plug-in unit, the intermediate space can also be left out between the pump housing of the liquid ring pump and the connection housing. The outlet of the first liquid separator then opens into this space.
  • the pump unit preferably has a two-stage liquid separator, so that the connection unit comprises a second liquid separator, which in turn communicates with the space provided in the connection unit.
  • the second liquid separator can be a gravitational separator, for example.
  • connection unit can also have a condenser for the fluid to be conveyed.
  • the condenser is preferably arranged between the suction port of the connection unit and the suction opening of the pump housing.
  • the fluid to be delivered can be cooled in the condenser in order to separate individual components of the fluid mixture as a liquid (for example water from a water vapor / air mixture to be delivered).
  • the connection unit preferably has at least one inlet connector and one outlet connector for a cooling medium flowing through the condenser, for example cooling water.
  • the condenser can be detachably mounted on the connection unit, the corresponding passage openings for the fluid to be conveyed and / or the cooling medium being closable when the condenser is removed.
  • connection unit therefore preferably also has a heat exchanger which communicates with the operating fluid of the vacuum pump.
  • connection unit can also comprise inlet connections and outlet connections for a cooling medium of the heat exchanger.
  • the heat exchanger can in turn be removably mounted on the connection unit.
  • connection piece for the fluid to be conveyed and / or the cooling medium can be provided directly on the condenser or the heat exchanger.
  • the heat exchanger and the condenser preferably do not have their own connection pieces, but rather communicate with the base body of the connection unit via corresponding openings. In this case, all the necessary connecting pieces can be provided on the base body of the connection unit.
  • the pump unit according to the invention can quickly and easily handle different tasks be adjusted. For example, different cooling media can flow through the condenser and / or the heat exchanger.
  • the cooling of the operating fluid of the pump in the heat exchanger can take place as continuous cooling or as open or closed circulation cooling.
  • the vacuum pump is fed with fresh cooling medium (e.g. fresh water and then it is drained off, for example into the sewage system.
  • fresh cooling medium e.g. fresh water
  • the fluid requirement corresponds to the hydraulically necessary requirement, i.e. the amount that the vacuum pump itself contains from an adjacent reservoir filled to the height of the shaft
  • the vacuum pump is provided with a separator in which the gas-liquid mixture is separated and part of the operating liquid is returned to the vacuum pump.
  • the necessary heat exchanger for the closed circulation cooling is mounted directly on the connection unit. If precondensation in the process fluid is also necessary, a condenser can also be mounted directly on the connection unit.
  • the heat is given off to an available cooling medium. In both cases, the cooling medium can be both gaseous (preferably air) and liquid (preferably water). Other heat sinks are also possible.
  • a valve for controlling the condensation of steam contained in the fluid to be conveyed is arranged between the suction port of the connection unit and the suction opening of the pump housing.
  • the valve can be largely closed in order to allow extensive condensation of liquid vapor contained in the fluid mixture in the upstream condenser.
  • the valve can be designed, for example, as a pressure-controlled slide valve, but other valve types, such as seat or ball valves, can also be used. Alternatively, the valve can also be actuated by other actuators, such as magnets or fluid pistons. Manual actuation of the valve is also conceivable.
  • the liquid ring pump is designed in several stages, preferably in two stages.
  • the liquid ring pump can comprise a second work space, which communicates with a pressure opening via a second control disk and in which a second impeller is arranged, the second work space being rotationally offset from the first work space.
  • the eccentric arrangement of the impeller in the pump housing means that the resulting forces can be distributed more evenly, so that further mounting of the drive shaft on the side of the pump housing facing away from the drive motor is no longer necessary and a block construction is also possible with the two-stage pump in which the pump housing is flanged directly to a drive motor or a bearing block.
  • rotationally offset is to be understood as follows: the longitudinal axis of the drive shaft, on which the two impellers are arranged in a rotationally fixed manner, is identical in both work spaces. The second work space is now rotated relative to the first work space in such a way that the respective eccentricities are oriented differently in the radial direction. In the case of the commonly used hollow cylindrical work spaces, this also means that the longitudinal axes of the two work spaces are offset from one another.
  • the second working space will advantageously be rotated relative to the first working space such that a vector directed from the center of the first working space to the center of the drive shaft is rotationally offset by an angle between 150 ° and 220 ° relative to a vector directed from the center of the second working space to the center of the drive shaft .
  • the angle is preferably approximately 180 °.
  • a much more compact design of the two-stage liquid ring pump according to the invention can be achieved if the angle of rotation by which the two Working spaces are rotationally offset, between 180 ° and 210 ° and particularly preferably about 195 °.
  • the connecting space provided in known two-stage liquid ring pumps between the two working spaces can be dispensed with, so that the first working space is separated from the second working space only by a single control disk, which in the present nomenclature is called the "third control disk""is referred to, although, seen in the conveying direction, is arranged between the first and second control disks.
  • this third control disk there is a connection slot which acts simultaneously as a pressure slot of the first work area and as a suction slot of the second work area.
  • a conventional two-stage liquid ring pump in the form of a bearing bracket requires four control disks.
  • the liquid ring pump according to the invention can also be made considerably more compact in the axial direction, which further reduces the forces acting on the single bearing of the drive shaft on the motor side and contributes to additional noise reduction.
  • the connecting slot in the control disk which separates the first from the second working space preferably has essentially the geometry of a conventional suction slot, ie the slot initially has a small width which, as viewed in the direction of rotation of the impeller, slowly increases. It has been found that such a geometry of the connecting slot has no disadvantages in its capacity as a pressure slot of the first working space.
  • the second and third control disks have no additional pressure openings, as are known from the single-stage pumps.
  • the delivery rate of the pump according to the invention is satisfactory even under different pressure conditions, so that there is no appreciable backflow or over-compression in the event of non-excessive deviations from the optimal pressure conditions.
  • the pump according to the invention is therefore relatively inexpensive to manufacture, since complex structural measures, such as those associated with additional pressure openings subject to valve, are eliminated.
  • the two working spaces are preferably essentially designed as hollow cylinders with a circular cross section. The drive shaft with the rotatable on it attached impellers are then guided eccentrically through the work rooms.
  • the eccentric arrangement of the impeller by means of a special shaping of the working space, for example by an ellipsoidal shape. If the working area has an elliptical cross-section, as is the case with double-acting pumps, the center of the ellipse can also lie on the axis of the drive shaft.
  • the two work rooms can have different shapes.
  • the pump housing overall has an essentially cylindrical general shape and the staggered working spaces are left out in segments of the pump housing with an identical outside diameter.
  • a hole can also be provided as internal cavitation protection.
  • the pump housing can also have a compressed air connection as external cavitation protection.
  • the liquid ring pump is preferably constructed in a block construction, the pump housing being flanged directly to the drive motor.
  • connection unit is designed as a connection housing, into which the liquid ring pump can be inserted as a plug-in unit, any operating fluid that escapes is not a problem, since this can be collected and returned in the connection housing.
  • the pump unit according to the invention is suitable for a wide variety of applications, in particular applications in which compact design and ease of maintenance are particularly important.
  • a typical application area is the use as a compact system for sterilizers.
  • In the pump unit are all components such as vacuum pump, separator, condenser and optional Heat exchanger already piped together. Only the process connections have to be connected and the system is ready for use.
  • a first embodiment of the pump unit according to the invention shown overall with reference number 10, is shown.
  • the pump assembly 10 comprises a liquid ring pump 11 and a connection unit 12 which, in the embodiment shown, is designed as a connection housing 13 which encompasses part of the pump housing 14.
  • the pump housing 14 is releasably flanged to the connection unit 12, 13.
  • the liquid ring pump 11 has a working space 15 surrounded by the pump housing 14, in which an impeller 17 connected to a drive shaft 16 in a rotationally fixed manner is arranged eccentrically.
  • the working space 15 is delimited on the end face by a control disk 18, in which a suction opening 19 is recessed.
  • the connection unit has a suction nozzle 20 which communicates with the suction opening (19) of the liquid ring pump via a connection space 21 delimited by the connection unit.
  • the liquid ring pump 11 also has a drive motor 22, which is connected to the drive shaft 16, in a manner known per se.
  • a control unit 23 for the drive motor 22 is connected to the connection shaft 16, in a manner known per se.
  • the connection unit 12 also has a heat exchanger 25 which is detachably flanged to the end face 24 of the connection unit 12 and, in the example shown, serves to cool the operating liquid of the liquid ring pump.
  • the connection unit has an inlet connection 26 and an outlet connection 27 for a cooling medium, which in the interior of the connection unit 12 via corresponding in the 1 and 2 Connection openings, not shown, is passed into the heat exchanger 25.
  • the liquid separator 28 has annular housing ribs 29 which surround the pressure openings 30 in the control disk 18 in such a way that the mixture emerging via the pressure openings 30 is guided in a rotational movement, so that liquid can be separated off on the housing ribs 29 while the gaseous components of the Fluid mixtures with residual liquid are cut out through a gap 31 into one in the connection unit Intermediate space 32 can flow.
  • the pump unit is provided with a two-stage separator, so that the fluid mixture can pass from the intermediate space 32 through openings 33 into the downstream second separator stage 34, which is designed as a gravitational separator.
  • the fluid mixture is calmed and passed over several baffle plates, so that the gas, which has largely been freed from liquid components, can escape into the environment via an outlet opening 35.
  • the outlet opening 35 can have a connection piece (not shown) to which, for example, a silencer and / or an exhaust pipe can be attached.
  • FIG. 4 to 15 A second embodiment of the pump assembly according to the invention is shown, in which components which have the same or a comparable role as in the embodiment of FIG 1 to 3 play, but with the same reference numerals increased by 100. These components are not explained in more detail below.
  • FIG. 4 is a schematic perspective view of the pump assembly 110 according to the invention, which is equipped with a two-stage liquid ring pump 111 in this embodiment.
  • the liquid ring pump 111 is inserted as a plug-in unit in the connection unit 112 designed as a connection housing 113.
  • the connection housing 113 of the pump assembly 100 has not only a heat exchanger 125 for the operating fluid, but also a condenser 140 for the fluid to be conveyed, which is connected upstream of the suction opening of the liquid ring pump.
  • the intake manifold 120 is arranged directly on the condenser 140. However, it could alternatively be provided on the connection housing 113.
  • the condenser 140 also has connecting pieces 141, 142 for a cooling medium.
  • connection pieces 126, 127 for the cooling medium are provided on the heat exchanger 125.
  • Both the condenser 140 and the heat exchanger 125 are designed as detachably flange-mounted modules which can be attached to the connection housing 113 as required.
  • Fig. 5 is designed as a plug-in unit liquid ring pump 111 of the pump unit 110 Fig. 4 in one from the connection housing 113 drawn out state shown.
  • This illustration also shows the suction opening 119 of the liquid ring pump 111, which communicates with the suction port 120 through the connection housing 113 in the installed state.
  • the suction opening is located at the level of a suction slot (not shown in the figure) in the first control disk 118.
  • the general cylindrical shape of the pump housing is clearly visible, as a result of which the pump 111 can be installed particularly easily as a plug-in unit in the connection housing 113.
  • connection housing 113 is shown separately, without a built-in liquid ring pump and without the condensers 140 and heat exchangers 125 attached to the front side 124 of the connection housing. If no heat exchanger is to be used during operation as well, one of the closable openings 120a, 120b of the connection housing 113 can also serve as an intake connection as an alternative to the intake connection 120.
  • Fig. 7 shows the connection housing 113 of the pump unit 110 of FIG Fig. 4 with an inserted liquid ring pump 111, however - for the sake of clarity - without the flanged drive motor 122 connected to the drive shaft 116, in axial longitudinal section.
  • the liquid ring pump 111 is formed in two stages in this embodiment.
  • the pump housing 114 consists of a first annular segment 143 which surrounds the first working space 115 with the first impeller 117 arranged therein, and a second annular segment 144 which surrounds the second working space 145.
  • a second impeller 146 is arranged on the same drive shaft 116.
  • the second working space 145 is delimited on the pressure side by a second control disk 147, in which pressure openings (not recognizable in the figures but known per se) are left out.
  • a single third control disk 148 is located between the first work space 115 and the second work space 145.
  • the second work space 145 is offset in rotation from the first work space 115 by an angle of 195 ° (cf. also Fig. 11 ).
  • a connecting slot 149 see Fig. 11
  • a conventional two-stage liquid ring pump in the form of a bearing bracket requires four control disks.
  • the liquid ring pump 111 can also be made considerably more compact in the axial direction, which further reduces the forces acting on the single bearing of the drive shaft on the motor side and contributes to additional noise reduction.
  • no special gas seal is required between the pump stages, since the gas seal during operation is carried out by the operating liquid that forms the liquid ring.
  • the second control disk 147 which closes off the second working space 145 on the pressure side, there is an (in Fig. 7 not recognizable, but for example in the Figures 10 , 11 and 12 shown) recessed pressure slot 150, which opens into a first liquid separator 128.
  • the first liquid separator 128 is arranged between the liquid ring pump 111 and the drive motor 122.
  • the first liquid separator 128 is designed as a cyclone separator and in the Figures 8 and 9 shown. It shows Fig. 8 an axial longitudinal section corresponding to the Fig. 7 , along the line VIII-VIII of the Fig. 9 .
  • the Fig. 9 itself shows a top view of the liquid separator Fig. 8 .
  • the liquid / gas mixture emerging from the pressure slot 150 of the second working space 145 is conducted in a circular path into an interior 151 of the first separator 128, which is axially divided into two levels by an annular partition plate 152.
  • the liquid separating in the outer area of the interior 151 is drained off via an outlet 153 in the bottom area of the separator 128, while the gas with any remaining liquid in the central area of the interior 151 is conveyed further in the direction of the drive motor 122 before the gas is then deflected radially , so that it can enter through openings 154 of the first liquid separator 128 into an annular space 155 which is between the outer wall of the pump housing 114 and the inner wall of the Connection housing 113 is recessed.
  • a channel is also provided in the first liquid separator 128, which has an opening 156 opening into the annular space 155 and an opening 157 leading into the interior 151.
  • the opening 156 lies at the level of a bore 158 recessed in the second control disk 147, so that a connection is established between the annular space 155 and the second working space 145 of the liquid ring pump 111, which serves as protection against cavitation (cf. also Fig. 10 ).
  • the pump housing can also have a compressed air connection as external cavitation protection.
  • Fig. 10 shows a cross section of the pump unit of the Fig. 4 along line XX of the Fig. 4 .
  • the separator is designed in two stages.
  • the first liquid separator again has at least one outlet opening for the fluid to be conveyed, which opens into an intermediate space provided in the connection unit, which forms a connection between the first separator and a second, downstream separator.
  • the gas emerging from the first cyclone separator 128 from the openings 154 passes via an intermediate space designed as an annular space 155 into a second separator 134, which is again designed as a gravitational separator, where the fluid flow via baffles 156 is calmed and slowed down, so that can separate residual liquid contained in the fluid stream.
  • the largely liquid-free gas can then leave the pump assembly 110 via the drain opening 135.
  • FIG. 11 is the media flow from the first to the second pump stage of the pump unit Fig. 4 exemplified in more detail using a top view of the first and second pump stages.
  • the third control disk 148 which is arranged between the first working space 115 and the second working space 145, has been omitted. Only the connecting slot 149 which is left free in the third control disk 148 is shown in FIG Fig. 11 shown in dashed lines.
  • the two impellers 117, 146 lie one above the other and one looks at the second control disc 147, which defines the second working space 145 closes on the pressure side.
  • the second working space 145 is rotationally offset from the first working space 115.
  • the longitudinal axis of the drive shaft 116, on which the two impellers 117, 146 are arranged in a rotationally fixed manner, is identical in both work spaces.
  • the second working space 145 is rotated relative to the first working space 115 in such a way that the respective eccentrics are oriented differently in the radial direction.
  • the forces occurring in the pump housing 114 can be distributed more uniformly, so that a further mounting of the drive shaft on the side of the pump housing pointing away from the drive motor 122 is no longer necessary.
  • FIG. 12 is a top view of the inside of the pressure side control plate 147 and the adjoining first liquid separator 128.
  • Valve 160 In front of the suction opening 119 of the pump housing 114 of the liquid ring pump 111 is in connection unit 112 in Fig. 13 Valve 160, shown in more detail, is arranged to control the condensation of vapor contained in the fluid to be conveyed.
  • the valve 160 is designed as a slide valve and is actuated by a piston 161 which is operated with compressed air.
  • the connection housing 112 has a compressed air connection 162 (cf. also Fig. 4 ).
  • the suction opening 119 is closed via a valve plate 163 of the valve 160 in order to enable extensive condensation of steam contained in the fluid mixture in the upstream condenser 140.
  • a hole 164 is left in the valve plate 163 for the condensate drain in the direction of the first stage of the liquid ring pump.
  • Fig. 14 shows a top view of the end face 124 of the connection unit 112 of FIG Fig. 6 and Fig. 15 is a longitudinal section along the line XV-XV of the Fig. 14 .
  • the connections 120a, 120b for the fluid to be conveyed into the condenser 140 and the connections 165, 166 for the operating liquid into the heat exchanger 125, as well as in connections 126, 127 and 141, 142 for the cooling water are in the form of continuous cooling or open or closed circulation cooling configurable.
  • connections 141a, 142a and 126a, 127a are closed on the end face 124 and only seal openings provided possibly on the rear side of the condenser and the heat exchanger. However, they can also be opened in order to configure a modified cooling circuit, for example if coolant sockets are arranged on the connection unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP13171693.8A 2012-06-12 2013-06-12 Pumpenaggregat mit Flüssigkeitsringpumpe Active EP2674571B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI201331748T SI2674571T1 (sl) 2012-06-12 2013-06-12 Črpalčni agregat s črpalko s tekočinskim obročem
PL13171693T PL2674571T3 (pl) 2012-06-12 2013-06-12 Agregat pompowy z pompą z pierścieniem cieczowym

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202012005755U DE202012005755U1 (de) 2012-06-12 2012-06-12 Pumpenaggregat

Publications (3)

Publication Number Publication Date
EP2674571A2 EP2674571A2 (de) 2013-12-18
EP2674571A3 EP2674571A3 (de) 2015-08-19
EP2674571B1 true EP2674571B1 (de) 2020-06-10

Family

ID=48672387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13171693.8A Active EP2674571B1 (de) 2012-06-12 2013-06-12 Pumpenaggregat mit Flüssigkeitsringpumpe

Country Status (5)

Country Link
EP (1) EP2674571B1 (pl)
DE (1) DE202012005755U1 (pl)
PL (1) PL2674571T3 (pl)
PT (1) PT2674571T (pl)
SI (1) SI2674571T1 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105351193A (zh) * 2015-11-30 2016-02-24 扬州长江水泵有限公司 一种自平衡锥体式真空泵

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB121518A (en) * 1917-12-19 1918-12-19 Ransomes & Rapier Ltd Improvements in or relating to Rotary Pumps.
US2532267A (en) * 1948-02-09 1950-11-28 Boston Marine Works Inc Method of and apparatus for compressing vapors
ATE79445T1 (de) * 1989-04-11 1992-08-15 Siemens Ag Fluessigkeitsringpumpe mit einem im seitenschild integrierten fluessigkeitsabscheider.
DE4417607C1 (de) * 1994-05-19 1995-10-19 Siemens Ag Pumpenaggregat
DE29809258U1 (de) 1998-05-22 1999-09-30 Speck-Pumpenfabrik Walter Speck KG, 91154 Roth Flüssigkeitsringgaspumpe in Lagerträgerbauweise
DE10111758A1 (de) * 2000-03-16 2001-10-11 Siemens Ag Wasserringpumpen in Sterilisatoren
DE20200839U1 (de) * 2002-01-21 2003-05-28 Speck-Pumpenfabrik Walter Speck GmbH & Co. KG, 91154 Roth Zweistufige Flüssigkeitsringpumpe in Blockbauweise
DE10330541A1 (de) * 2003-07-07 2005-02-03 Gebr. Becker Gmbh & Co Kg Drehschieber-Vakuumpumpe bzw. -Verdichter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
PL2674571T3 (pl) 2020-10-19
DE202012005755U1 (de) 2013-09-16
SI2674571T1 (sl) 2020-10-30
EP2674571A3 (de) 2015-08-19
PT2674571T (pt) 2020-07-16
EP2674571A2 (de) 2013-12-18

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