EP0845598B1 - Verfahren und Vorrichtung zum temperaturabhängigen Betreiben von Pumpen mit schneckenförmigen Rotoren - Google Patents
Verfahren und Vorrichtung zum temperaturabhängigen Betreiben von Pumpen mit schneckenförmigen Rotoren Download PDFInfo
- Publication number
- EP0845598B1 EP0845598B1 EP97120796A EP97120796A EP0845598B1 EP 0845598 B1 EP0845598 B1 EP 0845598B1 EP 97120796 A EP97120796 A EP 97120796A EP 97120796 A EP97120796 A EP 97120796A EP 0845598 B1 EP0845598 B1 EP 0845598B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- screw
- type pump
- stator
- pump
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 11
- 230000001419 dependent effect Effects 0.000 title description 3
- 239000000463 material Substances 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
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
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/28—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
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/22—Temperature difference
Definitions
- the invention relates to a method and an apparatus for temperature-dependent operation of screw pumps, one of the Process steps the temperature of the pumped medium in the stator area is measured.
- the Eccentric screw pump has one in the stator part of the pump Temperature sensor on, the measuring tip in or near the inner surface the stator sits.
- the temperature sensor is in a control unit Connection that responds when a predetermined temperature is reached and controls the drive of the rotor via servo motor or control gear or shuts down.
- stators with heat sensitive materials proved to be advantageous, especially the surface temperature of the Monitor stator because of direct friction between stator and rotor is higher than inside the stator.
- the control unit responds to the temperature prevailing on the stator surface, of course Tolerance values can be taken into account.
- the temperature monitoring relates here only at temperatures in the stator area.
- the measures at Exceeding the temperature not acceptable for the stator range from immediate shutdown via speed control up to the supply of Lubricating media.
- the US PS 25 18 597 shows a centrifugal pump, in the pump housing A temperature measuring device is used directly in the area of the pump rotor is.
- the temperature sensor takes over the material of the housing the medium temperature.
- a monitoring device is known from US Pat. No. 2,940,395 Interruption of pump operation when there is insufficient flow and thus associated overheating of the pump.
- the pump housing has this a temperature sensor on the outside of the stator, which points to the different Temperatures during the oil production operation reacts. There is a possibility to drive when a certain one is reached Stop the maximum temperature at the stator and after the pump has cooled down start again at a lower temperature value.
- the invention has for its object a method and a device to create, causing the dry running of pumps with helical Rotors based on the evaluation of temperatures far below critical material load temperatures is possible.
- the task is carried out in a method of the type specified at the outset solved by the features of claim 1. It will continue to be with a device of the type mentioned by the features of Claim 4 solved.
- the essence of the invention is the pump Protect against dry running without orientation at the temperature load limit of the stator / rotor material. It has been shown that the dry running of a screw pump can already be recognized when the measured temperature in the pump is still far below or a permissible maximum temperature for the pump material used lies.
- the duration of the dosing will depend on the parameters (Duration of the pending temperature difference, amount of the difference) determined temperature difference. Numerous, partly inventive Refinements result from the subclaims.
- the pump arrangement shown in Fig. 1 consists of a Eccentric screw pump 10 with a stator 12 and an eccentric helical rotor 14 rotating around its longitudinal axis.
- the stator 12 On the pressure side, the stator 12 is connected to a pipe 16 in order to to supply the conveyed medium to other machining or processing points.
- the inlet housing 18 On the suction side, that is to the right of the stator, the inlet housing 18 is located in which the drive connections between the rotor 14 and the drive 20 are housed. To compensate for the eccentricity of the rotor are corresponding to the drive shaft of the drive Joint connections or so-called bending rods are used.
- Inlet housing To support the delivery of the medium in the pump can in Inlet housing additional conveyors (screws or shovels) be provided.
- the nozzle 22 can be used to introduce the medium Pipeline or a funnel or corresponding metering devices be assigned.
- stator usually lined with elastic material 12 and the rotor 14 made of rigid material is created by the Rotation of the eccentrically mounted rotor without heat Pumped medium for overheating and thus to a standstill and Destruction of the pump 10 or the drive 20 can result.
- Temperature sensors 24, 26 are with a temperature controller, for example a differential temperature controller 28 via lines 30, 32 connected.
- the difference temperature controller 28 is directly above Power section via line 34 with the drive 20 in connection.
- the operation of the differential temperature controller 28 is so in Fig. 1 chosen that when a certain temperature difference is reached between the temperature sensors 24, 26 switches off the drive, the Speed controls or briefly reverses the direction of rotation and switches off or reverses again.
- the setting and visual display of a maximum allowable temperature or differential temperature can be entered via the input field 36 of the temperature difference controller 28 with the display 38.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
Claims (6)
- Verfahren zum temperaturabhängigen Betreiben von Schneckenpumpen (10), wobei in einem der Verfahrensschritte die Temperatur des geförderten mediums im Statorbereich (12) gemessen wird,
dadurch gekennzeichnet, daß in weiteren Verfahrensschritten die Temperatur des geförderten Mediums im Einlaufgehäuse (18) der Schneckenpumpe (10) oder in der saugseitigen Rohrleitung vor der Schneckenpumpe (10) gemessen wird; der Temperaturunterschied dieser beiden Temperaturen ermittelt wird; und die Schneckenpumpe (10) aufgrund dieses ermittelten Temperaturunterschiedes im Vergleich zu einem vorgegebenen Toleranzwert geregelt wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß die Schneckenpumpe (10) abgeschaltet wird, sofern die Temperatur des geförderten Mediums in der Schneckenpumpe (10) um über 10 % gegenüber der Temperatur im Einlaßbereich ansteigt. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß die Schneckenpumpe (10) abgeschaltet wird, sofern die Temperatur des geförderten Mediums in der Schneckenpumpe (10) um 5 °C größer ist als im Einlaufgehäuse (18) der Schneckenpumpe (10) oder in der saugseitigen Rohrleitung vor der Schneckenpumpe (10). - Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 3 für Schneckenpumpen (10) mit mindestens einem im Statorbereich angeordneten Temperaturfühler und einem Regelgerät, welches beim Erreichen einstellbarer Temperaturwerte den Schneckenpumpen betrieb beeinflußt,
dadurch gekennzeichnet, daß der Schneckenpumpe (10) ein zweiter Temperaturfühler (26) im Einlaufgehäuse (18) der Schneckenpumpe (10) oder in der saugseitigen Rohrleitung vor der Schneckenpumpe (10) zugeordnet ist, der ebenso wie der im Statorbereich angeordnete Temperaturfühler mit einem Differenztemperaturregler (28) in Verbindung steht. - Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet, daß der zweite Temperaturfühler (26) saugseitig im Einlaufgehäuse (18) angeordnet ist. - Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet, daß der zweite Temepraturfühler (26) in der saugseitigen Rohrleitung vor der Schneckenpumpe (10) angeordnet ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19649766 | 1996-11-30 | ||
| DE19649766A DE19649766C1 (de) | 1996-11-30 | 1996-11-30 | Verfahren und Vorrichtung zum temperaturabhängigen Betreiben von Pumpen mit schneckenförmigen Rotoren |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0845598A1 EP0845598A1 (de) | 1998-06-03 |
| EP0845598B1 true EP0845598B1 (de) | 2003-05-07 |
Family
ID=7813283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97120796A Expired - Lifetime EP0845598B1 (de) | 1996-11-30 | 1997-11-27 | Verfahren und Vorrichtung zum temperaturabhängigen Betreiben von Pumpen mit schneckenförmigen Rotoren |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0845598B1 (de) |
| DE (2) | DE19649766C1 (de) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001088379A1 (de) * | 2000-05-19 | 2001-11-22 | Netzsch-Mohnopumpen Gmbh | Verfahren und vorrichtung zum betreiben einer schneckenpumpe |
| DE10063953A1 (de) * | 2000-05-19 | 2002-02-07 | Netzsch Mohnopumpen Gmbh | Verfahren und Vorrichtung zum Betreiben einer Schneckenpumpe |
| DE10157143B4 (de) * | 2001-11-21 | 2007-01-11 | Netzsch-Mohnopumpen Gmbh | Wartungsintervallanzeige für Pumpen |
| DE10156927B4 (de) * | 2001-11-21 | 2006-06-08 | Netzsch-Mohnopumpen Gmbh | Pumpencontroller mit Teileidentifikation |
| BE1015088A5 (nl) * | 2002-09-03 | 2004-09-07 | Atlas Copco Airpower Nv | Verbeteringen aan compressors. |
| DE102004060418A1 (de) * | 2004-12-14 | 2006-07-06 | Metabowerke Gmbh | Pumpe mit Frostschutzeinrichtung |
| US7941906B2 (en) * | 2007-12-31 | 2011-05-17 | Schlumberger Technology Corporation | Progressive cavity apparatus with transducer and methods of forming and use |
| EP2712409B1 (de) * | 2011-09-30 | 2022-05-11 | Moyno, Inc. | Exzenterschneckenpumpensystem mit einem universalgelenk mit kühlsystem |
| FR3009038B1 (fr) * | 2013-07-26 | 2019-08-30 | Akwel | Gestion electronique d’une pompe de lave-glace |
| DE102020111386A1 (de) | 2020-04-27 | 2021-10-28 | Vogelsang Gmbh & Co. Kg | Zustandserfassung an Exzenterschneckenpumpen |
| DE102020123120A1 (de) | 2020-09-04 | 2022-03-10 | J. Wagner Gmbh | Betriebsverfahren für eine Fördervorrichtung mit einer Exzenterschneckenpumpe zum Fördern von zähflüssigen Baumaterialien |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2518597A (en) * | 1945-06-20 | 1950-08-15 | Niagara Alkali Company | Pumping apparatus |
| US2940395A (en) * | 1956-01-20 | 1960-06-14 | Perfect Circle Corp | Control means for pumping apparatus |
| DE2311770C3 (de) * | 1973-03-09 | 1983-05-05 | Kreissparkasse Recklinghausen, 4350 Recklinghausen | Temperaturüberwachungseinrichtung für Exzenterschneckenpumpen |
-
1996
- 1996-11-30 DE DE19649766A patent/DE19649766C1/de not_active Expired - Fee Related
-
1997
- 1997-11-27 EP EP97120796A patent/EP0845598B1/de not_active Expired - Lifetime
- 1997-11-27 DE DE59710030T patent/DE59710030D1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE19649766C1 (de) | 1998-04-09 |
| EP0845598A1 (de) | 1998-06-03 |
| DE59710030D1 (de) | 2003-06-12 |
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