EP0845598B1 - Procédé et appareil pour l'entraínement des pompes à rotors hélicoidaux en réponse à la température - Google Patents

Procédé et appareil pour l'entraínement des pompes à rotors hélicoidaux en réponse à la température Download PDF

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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
Application number
EP97120796A
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German (de)
English (en)
Other versions
EP0845598A1 (fr
Inventor
Wolfgang Rudert
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.)
Netzsch Pumpen and Systeme GmbH
Original Assignee
Netzsch Pumpen and Systeme 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 Netzsch Pumpen and Systeme GmbH filed Critical Netzsch Pumpen and Systeme GmbH
Publication of EP0845598A1 publication Critical patent/EP0845598A1/fr
Application granted granted Critical
Publication of EP0845598B1 publication Critical patent/EP0845598B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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)

Claims (6)

  1. Procédé à commander des pompes à vis (10) en fonction de la température, en mesurant la température du milieu circulé dans la zone du stator (12) en une parmi le étapes d'opération,
    caractérisé en ce que par des autres étapes d'opération, la température du milieu circulé est mesurée dans la volute d'amenée (18) de la pompe à vis (10) ou dans la canalisation du côté alimentation en amont de la pompe à vis (10), en ce que la différence de température entres ces deux températures est établie et en ce que la pompe à vis (10) est réglée à la base de cette différence en température relativement à une valeur de tolérance prédéfinie.
  2. Procédé selon la revendication 1,
    caractérisé en ce que la pompe à vis (10) est arrêtée si la température du milieu circulé dans la pompe à vis (10) s'augmente par 10 % relativement à la température dans la zone d'entrée.
  3. Procédé selon la revendication 1,
    caractérisé en ce que la pompe à vis (10) est arrêtée si la température du milieu circulé dans la pompe à vis (10) dépasse, par 5°C, la température dans la volute d'amenée (18) de la pompe à vis ou la température dans la canalisation du côté alimentation en amont de la pompe à vis (10).
  4. Dispositif à réaliser le procédé selon une quelconque des revendications 1 à 3 pour des pompes à vis (10), comprenant au moins un palpeur de température, disposé dans la zone du stator, et un dispositif de réglage, qui exerce de l'influence sur la marche de la pompe à vis dès que des valeurs de température ajustables sont atteintes,
    caractérisé en ce qu'un deuxième palpeur de température (26) dans la volute d'amenée (18) de la pompe à vis (10) ou dans la canalisation du côté admission en amont de la pompe à vis (10) est affecté à la pompe à vis (10), ce deuxième palpeur, comme le palpeur de température disposé dans la zone de stator, étant raccordé à un thermorégulateur différentiel (28).
  5. Dispositif selon la revendication 4,
    caractérisé en ce que ledit deuxième palpeur de température (26) est disposé du côté admission dans ladite volute d'amenée (18).
  6. Dispositif selon la revendication 4,
    caractérisé en ce que ledit deuxième palpeur de température (26) est disposé dans la canalisation du côté admission en amont de la pompe à vis (10).
EP97120796A 1996-11-30 1997-11-27 Procédé et appareil pour l'entraínement des pompes à rotors hélicoidaux en réponse à la température Expired - Lifetime EP0845598B1 (fr)

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 (fr) 1998-06-03
EP0845598B1 true EP0845598B1 (fr) 2003-05-07

Family

ID=7813283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97120796A Expired - Lifetime EP0845598B1 (fr) 1996-11-30 1997-11-27 Procédé et appareil pour l'entraínement des pompes à rotors hélicoidaux en réponse à la température

Country Status (2)

Country Link
EP (1) EP0845598B1 (fr)
DE (2) DE19649766C1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001088379A1 (fr) * 2000-05-19 2001-11-22 Netzsch-Mohnopumpen Gmbh Procede et dispositif pour actionner une pompe a vis
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 (fr) * 2011-09-30 2022-05-11 Moyno, Inc. Système de pompe à cavité progressive ayant un joint universel à système de refroidissement
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
DE19649766C1 (de) 1998-04-09
EP0845598A1 (fr) 1998-06-03
DE59710030D1 (de) 2003-06-12

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