EP2964957B1 - Pompe à cavité progressive avec protection contre une surpression - Google Patents

Pompe à cavité progressive avec protection contre une surpression Download PDF

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Publication number
EP2964957B1
EP2964957B1 EP14715204.5A EP14715204A EP2964957B1 EP 2964957 B1 EP2964957 B1 EP 2964957B1 EP 14715204 A EP14715204 A EP 14715204A EP 2964957 B1 EP2964957 B1 EP 2964957B1
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EP
European Patent Office
Prior art keywords
outer part
pump
inner part
thread
stator
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
EP14715204.5A
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German (de)
English (en)
Other versions
EP2964957A1 (fr
Inventor
Günter Strelow
Thomas Müller
Roland Stracke
Viktor Warkentin
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.)
Wilo SE
Original Assignee
Wilo SE
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Priority to PL14715204T priority Critical patent/PL2964957T3/pl
Publication of EP2964957A1 publication Critical patent/EP2964957A1/fr
Application granted granted Critical
Publication of EP2964957B1 publication Critical patent/EP2964957B1/fr
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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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/10—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
    • F04C2/1075—Construction of the stationary member
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1076—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member orbits or wobbles relative to the other member which rotates around a fixed axis
    • 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
    • F04C2250/00—Geometry
    • F04C2250/30—Geometry of the stator

Definitions

  • Such a pump is known as an eccentric screw pump and goes back to the idea of Rene Moineau, which in the German patent DE 602107 is described.
  • a device which has a respective screw-threaded outer part and an inner part, wherein the outer part has exactly one more thread than the inner part.
  • the ratio of the pitch on the outer part to the pitch on the inner part corresponds to the ratio of the number of threads on the corresponding parts in each cross section.
  • enclosed spaces between the outer and inner parts which move in a relative rotational movement of the inner part in the outer part axially from the inlet to the outlet side. If this device is to be used as a pump, then it must, according to the statements in DE 602107 always at least one Have completed space between the inlet and outlet side. This means that the threads of the outer part must have at least one complete screw thread.
  • Eccentric screw pumps are among the rotary positive displacement machines. In operation, they convey through the delivery chambers, ie the closed spaces between the inner part and the outer part, continuously to the exit side. If there is a closed volume on the outlet side, for example because of a closed valve, in particular a flow restrictor, pressure builds up continuously in the closed volume. Because without suitable measures, the pump will continue to pump fluid through the moving, closed delivery chambers from the inlet to the outlet side, whereby the pressure at the outlet rises sharply.
  • the output side throttling z. B. by a closed slide or caused by the deposition of lumpy components of the wastewater in the pipeline. The pressure building up on the outlet side can destroy the pump or the system connected to it.
  • a pressure which builds up on the outlet side leads in each case briefly to a flow from the pressure side (outlet side) to the suction side (inlet side) through the respective delivery chamber open on both sides, ie. to an internal leakage between the inlet side and the outlet, and thus to a shock-like pressure reduction.
  • FIG. 1 a pump is shown in the execution of an eccentric screw pump. It has an inlet side 7 and an outlet side 8. A pumped medium is conveyed during operation of the pump from the inlet side to the outlet side.
  • the ratio of the numbers of threads 5a, 5b, 6 here is 1: 2.
  • the pitches of the threads of outer part 2 and inner part 3 are chosen so that in each cross-section the ratio of the pitches of the threads 5a, 5b, 6 is identical to the ratio of the numbers of threads 5a, 5b, 6.
  • the external thread 6 of the inner part 3 has two full turns, ie it extends in the axial direction along two full helixes , Due to the higher pitch, the internal threads 5a, 5b would have the same axial length as the rotor 3, only 1 full turn.
  • the threads 5a, 5b of the outer part 2, ie the inner stator part 2 are wound less than an entire helix.
  • the axial length L of the inner stator part 2 is shorter compared to a conventional stator of an eccentric screw pump whose internal threads extend at least along a full helix.
  • the efficiency of the pump is increased by the measure according to the invention, because due to the shortened stator lower friction losses between the inner part 3 and the outer part 2 arise.
  • an eccentric screw pump not as in DE 602107 described must necessarily have at least a closed space between the inner part 3 and the outer part 2, ie the threads of the outer part must have at least one screw thread. Rather, a shortened compared to this technical teaching stator 2 can be used, which surprisingly leads to the described pressure reduction on the pressure side 8 and also causes an increase in efficiency during operation.

Claims (5)

  1. Pompe pour refouler un fluide à refouler depuis un côté d'entrée (7) jusqu'à un côté de sortie (8), comprenant une partie extérieure (2) et une partie intérieure (3) disposée dans celle-ci, dont l'une est une partie (2, 3) entraînée en rotation, et une partie (2, 3) pouvant effectuer un déplacement excentrique par rapport à l'autre partie (3, 2), la partie intérieure (2) présentant au moins un filet (6) s'étendant dans la direction axiale sous forme hélicoïdale et la partie extérieure (3) présentant un nombre de filets (5a, 5b, 6) supérieur de un au nombre de filets de la partie intérieure (2), le rapport des nombres de filets (5a, 5b, 6) dans chaque section transversale étant identique au rapport des pas de filets (5a, 5b, 6), et la partie extérieure (2) et la partie intérieure (3) étant en contact de telle sorte qu'entre les parties (2, 3) soient formées des chambres de refoulement (A, B) dont la position axiale peut être modifiée par rotation d'une partie (2, 3) par rapport à l'autre partie (3, 2), de telle sorte que le fluide à refouler puisse être refoulé depuis le côté d'entrée (7) vers le côté de sortie (8), caractérisée en ce que les filets (5a, 5b) de la partie extérieure (2) sont enroulés le long de sa longueur axiale (L) sur moins d'une hélice complète.
  2. Pompe selon la revendication 1, caractérisée en ce que les filets (5a, 5b) de la partie extérieure (2) sont enroulés le long de sa longueur axiale (L) seulement entre 75 % et 95 % d'une hélice complète.
  3. Pompe selon la revendication 1 ou 2, caractérisée en ce que la partie extérieure (2) se déplace de manière excentrique autour de l'axe (9) de la partie intérieure (3) et la partie intérieure (3) est entraînée en rotation.
  4. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que la partie extérieure (2) est formée d'un matériau élastomère et est retenue sur le boîtier de pompe (10) au niveau de l'une de ses extrémités axiales au moyen d'un moyen de retenue élastique (1).
  5. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que la longueur axiale (L) de la partie extérieure (2) est choisie de telle sorte que la pompe possède une hauteur de refoulement maximale déterminée (Hnom).
EP14715204.5A 2013-03-07 2014-02-06 Pompe à cavité progressive avec protection contre une surpression Active EP2964957B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14715204T PL2964957T3 (pl) 2013-03-07 2014-02-06 Mimośrodowa pompa ślimakowa z ochroną przed nadmiernym ciśnieniem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013003833.2A DE102013003833A1 (de) 2013-03-07 2013-03-07 Pumpe mit Überdruckschutz
PCT/EP2014/000320 WO2014135239A1 (fr) 2013-03-07 2014-02-06 Pompe à vis excentrique avec protection contre les surpressions

Publications (2)

Publication Number Publication Date
EP2964957A1 EP2964957A1 (fr) 2016-01-13
EP2964957B1 true EP2964957B1 (fr) 2017-11-22

Family

ID=50439316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14715204.5A Active EP2964957B1 (fr) 2013-03-07 2014-02-06 Pompe à cavité progressive avec protection contre une surpression

Country Status (6)

Country Link
US (1) US9920758B2 (fr)
EP (1) EP2964957B1 (fr)
CN (1) CN105121853B (fr)
DE (1) DE102013003833A1 (fr)
PL (1) PL2964957T3 (fr)
WO (1) WO2014135239A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013004219U1 (de) * 2013-05-06 2013-05-17 SGF SüDDEUTSCHE GELENKSCHEIBENFABRIK GMBH & CO. KG Stator für eine Förderpumpe
CN106999881A (zh) * 2014-10-07 2017-08-01 捷通国际有限公司 个人配制装置
DE202015006862U1 (de) 2015-10-02 2015-10-23 Beinlich Pumpen Gmbh Pumpe für hydraulische Medien
DE102017004949B4 (de) 2017-05-23 2021-12-09 Thomas Magnete Gmbh Hubkolbenpumpe
CN108000836B (zh) * 2017-12-11 2023-08-29 华南理工大学 偏心转子挤出机的熔体输送流量平衡补偿方法及稳定装置
DE102021006414A1 (de) * 2021-12-30 2023-07-06 Seepex Gmbh Stator für eine Exzenterschneckenpumpe

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602107C (de) 1930-05-13 1934-09-03 Rene Joseph Louis Moineau Als Pumpe, Motor oder einfaches UEbertragungsgetriebe verwendbare Vorrichtung aus zwei ineinander angeordneten Teilen mit dauernd in Beruehrung stehenden Zaehnen
US2612845A (en) 1950-04-29 1952-10-07 Robbins & Myers Helical gear pump with nonrigid casing
US2691347A (en) 1950-10-19 1954-10-12 Robbins & Meyers Inc Helical gear pump with backed-up nonrigid casing
US2826152A (en) * 1955-08-30 1958-03-11 Robbins & Myers Helical gear pump with bellows stator
DE2139949A1 (de) * 1970-08-31 1972-03-02 Environment/One Corp., Schenectady, N.Y. (V.St.A.) Schraubenpumpe
US3802803A (en) * 1971-10-13 1974-04-09 A Bogdanov Submersible screw pump
DE4116697C1 (en) * 1991-05-22 1992-03-12 Netzsch-Mohnopumpen Gmbh, 8264 Waldkraiburg, De Casing for eccentric worm pump with split stator jacket - has stator arranged to burst on excess of preset inner overpressure in split region
DE4134853C1 (fr) 1991-05-22 1992-11-12 Netzsch-Mohnopumpen Gmbh, 8264 Waldkraiburg, De
DE19842754C2 (de) * 1998-09-18 2001-04-26 Seepex Seeberger Gmbh & Co Exzenterschneckenpumpe
DE20304292U1 (de) 2003-03-12 2003-05-15 Stegner Anke Exzenterschneckenpumpe
JP2008175199A (ja) * 2006-12-20 2008-07-31 Heishin Engineering & Equipment Co Ltd 一軸偏心ねじポンプ

Also Published As

Publication number Publication date
US20160003244A1 (en) 2016-01-07
DE102013003833A1 (de) 2014-09-11
WO2014135239A1 (fr) 2014-09-12
CN105121853B (zh) 2016-11-30
EP2964957A1 (fr) 2016-01-13
PL2964957T3 (pl) 2018-04-30
CN105121853A (zh) 2015-12-02
US9920758B2 (en) 2018-03-20

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