EP0844397B1 - Pompe à engrenages hélicoidaux - Google Patents
Pompe à engrenages hélicoidaux Download PDFInfo
- Publication number
- EP0844397B1 EP0844397B1 EP97402779A EP97402779A EP0844397B1 EP 0844397 B1 EP0844397 B1 EP 0844397B1 EP 97402779 A EP97402779 A EP 97402779A EP 97402779 A EP97402779 A EP 97402779A EP 0844397 B1 EP0844397 B1 EP 0844397B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stator
- rotor
- gear pump
- pump according
- steel
- 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
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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2251/00—Material properties
- F05C2251/04—Thermal properties
- F05C2251/042—Expansivity
- F05C2251/044—Expansivity similar
Definitions
- the present invention relates to improvements brought to gear pumps, or Moineau pumps, comprising two internal helical gears, one to the other, the internal helical gear which is rotating (rotor) having one tooth less than the helical gear which is fixed (stator).
- Document GB 2 120 729 A shows such a helical gear pump.
- the rotor is made of high strength steel, coated with chrome to withstand abrasion; he is suspended at the end of a drill string which drives it in rotation.
- the stator is made of molded elastomer encased in a steel tube; it hangs at the end of a train of tubes surrounding the above-mentioned train of rods. The seal between rotor and stator is obtained by giving the rotor slightly larger than the minimum diameter of the stator.
- the pumps thus constituted give full satisfaction in pumping wells where the temperature does not exceed about 140 ° C.
- the object of the invention is essentially to remedy to this disadvantage and to propose an improved arrangement Sparrow pump clean to operate correctly in a wide temperature range which can extend up to temperature significantly above 140 ° C, which is therefore usable in particular for oil extraction in wells deep.
- a gear pump or Moineau pump improved arrangement in accordance with the invention includes the provisions set out in the characterizing part of claim 1 below.
- the improved arrangement according to the invention is based on the fact that, due to the appropriate choice of constituent materials respectively of the rotor and the stator, the transverse and longitudinal dimensions of the rotor and the transverse and longitudinal dimensions respectively of the stator cavity move in the same direction and of same order of magnitude during thermal variations (i.e. that the transverse dimension of the rotor and the dimension transverse of the stator cavity increase significantly of the same order of magnitude when the temperature increases and decreases by roughly the same order of magnitude when the temperature decreases).
- the pump therefore remains functionally operational in the presence of ambient thermal variations when the rotor and stator are made of respective materials having coefficients of thermal expansion such that a predetermined functional clearance between rotor and stator is kept approximately over a wide range of temperature, ranging from around 15 ° C (room temperature rotor assembly in the stator in the workshop) up to a ambient temperature during operation of the order of 300 ° C.
- the operational temperature range of the pump can be from about 40 ° C to about 250 ° C.
- stator the two materials constituting the stator and the rotor respectively, so that the game is kept approximately constant between rotor and stator, have expansion coefficients thermal of the same order of magnitude, even relatively neighbors.
- the rotor being metallic for possess sufficient mechanical strength it is desirable that the stator is also metallic.
- the material of the rotor and the material of the stator are chosen so as to be compatible mechanically vis-à-vis friction problems and wear, and are therefore selected in accordance with the rules known to those skilled in the art.
- a pair of preferentially suitable materials in the context of the invention is formed by 316 L steel, whose coefficient of linear thermal expansion is 16.5 x 10 -6 mm / ° / mm, to form the rotor and bronze UE7 Pb6 Z4, whose coefficient of linear thermal expansion is 17 x 10 -6 mm / ° / mm, to form the stator.
- a privileged (although not exclusive) area of use a gear pump or sparrow pump arranged in accordance to the invention resides in petroleum extraction in deep well, with an ambient temperature at the bottom of wells can vary from about 40 ° C to about 250 ° C.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
acier | Z 30 C 13 | 11,8 |
acier | 316 L | 16,5 |
fonte | FGS 415 | 11 |
fonte | FGS Ni 20 | 16 |
fonte | FGS Ni30 Cr 1 | 12 |
bronze | UE7 Pb 6 Z 4 | 17 |
- le stator peut être fabriqué par compression extérieure d'une pièce massive autour d'un poinçon ayant le profil définitif de la forme intérieure (cavité) du stator;
- le stator est constitué d'éléments individuellement obtenus par fluotournage et raccordés entre eux par des manchons.
Claims (6)
- Pompe à engrenages, ou pompe Moineau, comportant deux engrenages hélicoïdaux intérieurs l'un à l'autre, l'engrenage hélicoïdal interne qui est rotatif (rotor) ayant une dent de moins que l'engrenage hélicoïdal externe qui est fixe (stator),
caractérisée en ce que le rotor et le stator sont constitués en des matériaux respectifs mécaniquement compatibles choisis parmi l'acier Z 3 OC 13, l'acier 316L, la fonte FGS 415, la fonte FGS Ni 20, la fonte FGS Ni 30 Crl et le bronze UE 7 Pb 6Z4, qui ont des coefficients de dilatation thermique respectifs conduisant à des dilatations respectives du rotor et du stator telles qu'un jeu approximativement constant soit maintenu entre le rotor et le stator sur une plage de température ambiante comprise entre environ 15°C et environ 300°C. - Pompe à engrenages selon la revendication 1, caractérisée en ce que le rotor est constitué en acier 316L et le stator en bronze spécial UE 7 Pb 6Z4.
- Pompe à engrenages selon la revendication 1 ou 2, caractérisée en ce que le jeu sensiblement constant entre rotor et stator est maintenu sur une plage de température d'environ 40°C à environ 250°C.
- Pompe à engrenages selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le stator est fabriqué par compression extérieure d'une pièce massive autour d'un poinçon ayant le profil définitif de la forme intérieure du stator.
- Pompe à engrenages selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le stator est constitué par des éléments individuellement obtenus par fluotournage et raccordés entre eux par des manchons.
- Utilisation d'une pompe à engrenages selon l'une quelconque des revendications 1 à 5, pour l'extraction de produits pétroliers en puits profond.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9614227A FR2756018B1 (fr) | 1996-11-21 | 1996-11-21 | Pompe a engrenages helicoidaux |
FR9614227 | 1996-11-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0844397A1 EP0844397A1 (fr) | 1998-05-27 |
EP0844397B1 true EP0844397B1 (fr) | 2003-05-14 |
Family
ID=9497865
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97402779A Expired - Lifetime EP0844397B1 (fr) | 1996-11-21 | 1997-11-19 | Pompe à engrenages hélicoidaux |
Country Status (8)
Country | Link |
---|---|
US (1) | US6082980A (fr) |
EP (1) | EP0844397B1 (fr) |
AR (1) | AR010071A1 (fr) |
AT (1) | ATE240459T1 (fr) |
CA (1) | CA2221487C (fr) |
DE (1) | DE69721943T2 (fr) |
ES (1) | ES2198539T3 (fr) |
FR (1) | FR2756018B1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011086008A1 (de) | 2011-11-09 | 2013-05-16 | Bayerische Motoren Werke Aktiengesellschaft | Antriebssystem für ein Kraftfahrzeug mit einem steuerbaren Dämpfungselement |
DE102011086014A1 (de) | 2011-11-09 | 2013-05-16 | Bayerische Motoren Werke Aktiengesellschaft | Antriebssystem für ein Kraftfahrzeug mit einem temperaturgesteuerten Dämpfungselement |
DE102011086013A1 (de) | 2011-11-09 | 2013-05-16 | Bayerische Motoren Werke Aktiengesellschaft | Antriebssystem für ein Kraftfahrzeug mit einer Dämpfungseinrichtung |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10141863A1 (de) * | 2000-08-28 | 2002-03-14 | Dana Corp | Hydraulische Verdrängerpumpe |
FR2826407B1 (fr) | 2001-06-21 | 2004-04-16 | Pcm Pompes | Stator de pompe moineau et procede pour sa fabrication |
US8182252B2 (en) * | 2007-10-30 | 2012-05-22 | Moyno, Inc. | Progressing cavity pump with split stator |
US8215014B2 (en) * | 2007-10-31 | 2012-07-10 | Moyno, Inc. | Method for making a stator |
DE102008036511B4 (de) | 2008-08-05 | 2015-04-30 | Netzsch Pumpen & Systeme Gmbh | Exzenterschneckenpumpe |
US8523545B2 (en) * | 2009-12-21 | 2013-09-03 | Baker Hughes Incorporated | Stator to housing lock in a progressing cavity pump |
EP2998584B1 (fr) | 2014-09-16 | 2017-04-05 | NETZSCH Pumpen & Systeme GmbH | Stator pour une pompe à vis excentrique, pompe à vis excentrique et procédé de fabrication d'un stator |
US10184462B2 (en) | 2015-11-06 | 2019-01-22 | Caterpillar Inc. | Drive assembly and pump assembly arrangement for cryogenic pump |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3622254A (en) * | 1969-06-20 | 1971-11-23 | Precision Scient Co | Pump |
US4008015A (en) * | 1975-11-03 | 1977-02-15 | Eaton Corporation | Rotor-stator gear set |
JPS5379108A (en) * | 1976-12-24 | 1978-07-13 | Toyota Motor Corp | Rotor housing for a rotary engine |
GB2120729B (en) * | 1982-05-21 | 1985-07-24 | Mono Pumps Ltd | Helical gear pump |
FR2617534A1 (fr) * | 1987-06-30 | 1989-01-06 | Inst Francais Du Petrole | Dispositif de pompage d'un fluide dans le fond d'un puits |
US5772418A (en) * | 1995-04-07 | 1998-06-30 | Tochigi Fuji Sangyo Kabushiki Kaisha | Screw type compressor rotor, rotor casting core and method of manufacturing the rotor |
US5876192A (en) * | 1996-11-08 | 1999-03-02 | Ford Global Technologies, Inc. | Differential expansion control assembly for a pump |
US5797734A (en) * | 1996-11-26 | 1998-08-25 | Chrysler Corporation | Pump for hot and cold fluids |
-
1996
- 1996-11-21 FR FR9614227A patent/FR2756018B1/fr not_active Expired - Fee Related
-
1997
- 1997-11-18 US US08/972,499 patent/US6082980A/en not_active Expired - Lifetime
- 1997-11-19 EP EP97402779A patent/EP0844397B1/fr not_active Expired - Lifetime
- 1997-11-19 ES ES97402779T patent/ES2198539T3/es not_active Expired - Lifetime
- 1997-11-19 DE DE69721943T patent/DE69721943T2/de not_active Expired - Lifetime
- 1997-11-19 AT AT97402779T patent/ATE240459T1/de not_active IP Right Cessation
- 1997-11-19 CA CA002221487A patent/CA2221487C/fr not_active Expired - Lifetime
- 1997-11-20 AR ARP970105445A patent/AR010071A1/es unknown
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011086008A1 (de) | 2011-11-09 | 2013-05-16 | Bayerische Motoren Werke Aktiengesellschaft | Antriebssystem für ein Kraftfahrzeug mit einem steuerbaren Dämpfungselement |
DE102011086014A1 (de) | 2011-11-09 | 2013-05-16 | Bayerische Motoren Werke Aktiengesellschaft | Antriebssystem für ein Kraftfahrzeug mit einem temperaturgesteuerten Dämpfungselement |
DE102011086013A1 (de) | 2011-11-09 | 2013-05-16 | Bayerische Motoren Werke Aktiengesellschaft | Antriebssystem für ein Kraftfahrzeug mit einer Dämpfungseinrichtung |
DE102011086014B4 (de) * | 2011-11-09 | 2021-02-25 | Bayerische Motoren Werke Aktiengesellschaft | Antriebssystem für ein Kraftfahrzeug mit einem temperaturgesteuerten Dämpfungselement |
DE102011086008B4 (de) * | 2011-11-09 | 2021-02-25 | Bayerische Motoren Werke Aktiengesellschaft | Antriebssystem für ein Kraftfahrzeug mit einem steuerbaren Dämpfungselement |
Also Published As
Publication number | Publication date |
---|---|
AR010071A1 (es) | 2000-05-17 |
EP0844397A1 (fr) | 1998-05-27 |
CA2221487A1 (fr) | 1998-05-21 |
CA2221487C (fr) | 2004-09-28 |
ES2198539T3 (es) | 2004-02-01 |
DE69721943D1 (de) | 2003-06-18 |
US6082980A (en) | 2000-07-04 |
FR2756018A1 (fr) | 1998-05-22 |
DE69721943T2 (de) | 2004-02-19 |
FR2756018B1 (fr) | 1999-01-22 |
ATE240459T1 (de) | 2003-05-15 |
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