EP0736691B1 - Innenzahnradpumpe mit radialen Zuführungsröhren - Google Patents

Innenzahnradpumpe mit radialen Zuführungsröhren Download PDF

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Publication number
EP0736691B1
EP0736691B1 EP95200845A EP95200845A EP0736691B1 EP 0736691 B1 EP0736691 B1 EP 0736691B1 EP 95200845 A EP95200845 A EP 95200845A EP 95200845 A EP95200845 A EP 95200845A EP 0736691 B1 EP0736691 B1 EP 0736691B1
Authority
EP
European Patent Office
Prior art keywords
teeth
profile
annulus gear
pump
toothing
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
EP95200845A
Other languages
English (en)
French (fr)
Other versions
EP0736691A1 (de
Inventor
Albert René Maurice Joseph Cornet
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.)
Safran Aero Boosters SA
Original Assignee
Techspace Aero SA
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 Techspace Aero SA filed Critical Techspace Aero SA
Priority to DE69513142T priority Critical patent/DE69513142T2/de
Priority to EP95200845A priority patent/EP0736691B1/de
Priority to ES95200845T priority patent/ES2138137T3/es
Priority to US08/625,219 priority patent/US5685704A/en
Publication of EP0736691A1 publication Critical patent/EP0736691A1/de
Application granted granted Critical
Publication of EP0736691B1 publication Critical patent/EP0736691B1/de
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
    • 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
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • 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
    • F04C2/102—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 the two members rotating simultaneously around their respective axes

Definitions

  • the invention relates to a rotary positive displacement pump with internal gear of the so-called gerotor or trochoid type and comprising a radial supply.
  • Figures 1 and 2 show a known example of a gerotor without radial supply, according to a representation schematic of the principle of realization.
  • the fluid is sucked in, then discharged by cavities called capsules 1 of cyclically variable volume, created between teeth 2 and 3 of the pinion 4 and the crown 5. a special internal gear.
  • the fluid is admitted and discharged through the cross section of capsules 1 in the end planes of the gear, perpendicular to the axis thereof, following the passage of these capsules 1 in front of basins or lights 6 of suitable shape, cut into fixed flat surfaces surrounding the gear and belonging to parts called flanges 7.
  • the pools cut in the flanges must have an axial depth proportional to the axial height of pump, which increases the size of the pump in the axial direction.
  • the overall movement of the fluid passing through the pump has many changes of direction, generators of energy and pressure losses.
  • Figures 3 and 4 show a example of such an embodiment according to which channels radials 10, of more or less complex shape are drilled in the outer ring 15, allowing the supply of capsules 11 in a radial direction, from basins 16 of adequate shape dug into the bore surrounding the outer ring 15. This increases the cross-section of admission.
  • volume generated by these channels constitutes a large dead volume, which greatly degrades performance pump, including self-priming capacity and volumetric efficiency with a compressible fluid.
  • FR-A-1.504.705 describes a positive-displacement positive displacement pump where the crown Outer is formed by an assembly of rings and bars constituting the teeth. The crown has the same outside diameter over its entire height. Ports radial feed are provided between the teeth with circular profile and the rings.
  • the object of the invention is to provide a positive displacement pump rotary with internal gears, of the so-called gerotor type meeting needs going beyond the limits imposed by an axial feed design, without incurring disadvantages of prior known arrangements which have been proposed.
  • a pump of this type and meeting these conditions is such that the radius being variable along said profile and having a lower value at the back of a tooth and a higher value elevated at the front of the tooth, front and rear being defined relative to the direction of movement of the gear in rotation, the toothing profile of the internal pinion being conjugated with said outer crown profile.
  • a gerotor positive displacement pump produced in accordance with the invention is shown schematically in Figures 5 to 8.
  • the pump elements include an internal gear 20 composed of an inner pinion 21 driven in rotation by a shaft 22 and an outer ring 23 with teeth interior 24 cooperating with said pinion 21, placed at the interior of a two-part casing 25 and 26 and the whole mounted between two flanges 27 and 28.
  • the outer ring 23 includes teeth 29 separated by spaces 30 constituting open passages between said teeth 29 and extending over a portion 31 of the height of said crown.
  • the complementary part 32 of the crown toothed 23 is formed by a continuous ring 33 whose diameter outside D2 is greater than the outside diameter D1 of the part 31.
  • the ring 33 thus connects and carries the teeth 29.
  • Said ring 33 also constitutes the guide surfaces effective for mounting the ring gear 23.
  • the single ring 33 as shown in FIGS. 5, 6 and 7 can be replaced by two or more rings, provided that the open passages 30 made between the teeth 29 are kept.
  • the diameter of said ring or its arrangement of one side or the other of the teeth may also vary.
  • a first lateral inlet opening 34 made on the casing 25 allows the supply of fluid to be conveyed which, through the radial passages 30, arrives at the cavities or capsules 35 formed between the teeth to reach, again through the radial passages 30, a second lateral outlet opening 36 formed opposite to the first opening 34 on the casing 25.
  • a radial supply section of the pump is thus obtained which is greater than the axial supply section usually used on a conventional gerotor pump, without however incurring the drawbacks due to the creation of radial channels. obtained by drilling the external toothed crown.
  • FIG. 9 representing examples of teeth of a inner pinion 40 and an outer ring gear 41 interior shows the criteria used to determine of an asymmetrical profile of teeth according to the invention.
  • the solution according to the invention consists in carrying out a asymmetrical toothing profile, as shown in the Figures 10 and 11, where the radius of an arc is variable the along the profile.
  • the radius R1 of the arc corresponding to the profile is very small while, at the front of the tooth, the radius R2 of the arc of circle corresponding to the profile is very large.
  • the advantages obtained by means of a pump gerotor according to the invention are due to the minimization of the dead volume and minimizing the centripetal path and the mass of fluid subjected to centrifugal force, thanks to the reduction of the outer diameter of the outer ring to make the radial passage between the teeth of said crowned.
  • the use of a profile asymmetrical toothing, in arcs of a circle with variable radius maximizes the passage area of radial feed, while maintaining an angle of attack advantageous toothing and also to provide direction general filling minimizing the harmful effect of centrifugal force.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Claims (1)

  1. Innenzahnradpumpe mit einem Innenzahnrad (21), das auf einer in Drehbewegung angetriebenen Welle (22) sitzt und mit einem Außenkranz (23) mit Innenzahnung (24) mit asymmetrischem Profil zusammenwirkt, wobei dieser Außenkranz (23) einen geschlossenen Einfachring (33) aufweist, der die Zähne (29) des Kranzes (23) hält und verbindet, und wobei ein erster Außendurchmesser D1 des Außenkranzes (23) auf dem Teil (31) der Höhe des Kranzes (23), der komplementär zu dem geschlossenen Ring (33) geformt ist, bis auf den Wert des theoretischen Durchmessers am Grund der Zahnung dieses Kranzes (23) reduziert ist, so daß eine radiale Zuführung zu dieser Pumpe durch die Zwischenräume (30) hindurch, die zwischen den Zähnen (29) des Außenkranzes (23) ausgeführt sind, und auf das Profil der Zahnung des Außenkranzes (23) gewährleistet ist, wobei der Radius des Kreisbogens längs des Profils variabel ist und an der Hinterflanke eines Zahns (48-49) einen kleineren Wert R1 und an der Vorderflanke des Zahns (48-49) einen größeren Wert R2 aufweist, wobei Vorderflanke und Hinterflanke mit Bezug auf die Bewegungsrichtung des drehenden Zahnrads definiert sind, wobei das Zahnungsprofil des Innenzahnrads (21) mit dem genannten Profil des Außenkranzes (23) gekoppelt ist.
EP95200845A 1995-04-04 1995-04-04 Innenzahnradpumpe mit radialen Zuführungsröhren Expired - Lifetime EP0736691B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE69513142T DE69513142T2 (de) 1995-04-04 1995-04-04 Innenzahnradpumpe mit radialen Zuführungsröhren
EP95200845A EP0736691B1 (de) 1995-04-04 1995-04-04 Innenzahnradpumpe mit radialen Zuführungsröhren
ES95200845T ES2138137T3 (es) 1995-04-04 1995-04-04 Bomba volumetrica rotatoria con gerotor de alimentacion radial.
US08/625,219 US5685704A (en) 1995-04-04 1996-04-01 Rotary gear pump having asymmetrical convex tooth profiles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95200845A EP0736691B1 (de) 1995-04-04 1995-04-04 Innenzahnradpumpe mit radialen Zuführungsröhren

Publications (2)

Publication Number Publication Date
EP0736691A1 EP0736691A1 (de) 1996-10-09
EP0736691B1 true EP0736691B1 (de) 1999-11-03

Family

ID=8220165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95200845A Expired - Lifetime EP0736691B1 (de) 1995-04-04 1995-04-04 Innenzahnradpumpe mit radialen Zuführungsröhren

Country Status (4)

Country Link
US (1) US5685704A (de)
EP (1) EP0736691B1 (de)
DE (1) DE69513142T2 (de)
ES (1) ES2138137T3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1027698A1 (fr) 2019-10-21 2021-05-18 Safran Aero Boosters Pompe volumétrique
BE1027697A1 (fr) 2019-10-21 2021-05-18 Safran Aero Boosters Pompe volumétrique
BE1027701A1 (fr) 2019-10-21 2021-05-18 Safran Aero Boosters Moteur-pompe

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052779A1 (de) * 2000-10-25 2002-05-08 Eckerle Ind Elektronik Gmbh Füllstücklose Innenzahnradpumpe
EP1319837A1 (de) 2001-12-14 2003-06-18 Techspace Aero S.A. Gerotorpumpe
EP1396639A1 (de) 2002-09-03 2004-03-10 Techspace Aero S.A. Gerotorpumpe
EP1803938A1 (de) 2005-12-27 2007-07-04 Techspace Aero S.A. Hochintegrierte Pumpeneinheit mit elektrischem Motor
FR3017413B1 (fr) 2014-02-07 2018-10-26 Safran Aircraft Engines Turbomachine equipee d'un groupe de lubrification.
JP6581773B2 (ja) * 2014-12-24 2019-09-25 日本電産トーソク株式会社 ポンプ装置
CN108662424A (zh) * 2018-08-16 2018-10-16 湖南机油泵股份有限公司 一种能改善气蚀的转子式机油泵
US11506199B2 (en) 2020-02-07 2022-11-22 Pratt & Whitney Canada Corp. Pump assembly with pump chambers located radially relative to one another and connected serially

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822760A (en) * 1958-02-11 Rotary pump
US1753476A (en) * 1927-06-29 1930-04-08 Joseph R Richer Rotary pump or blower
US2053919A (en) * 1932-07-30 1936-09-08 Gulf Research Development Co Rotary pump
US2458958A (en) * 1947-04-30 1949-01-11 Gulf Research Development Co Internal gear pump and compressor
US2760438A (en) * 1955-01-03 1956-08-28 Francis A Hill Extra capacity displacement pump
DE1525066A1 (de) * 1965-01-15 1969-07-03 Otto Eckerle Verfahren zur Herstellung eines Rotors,insbesondere fuer Innenlaeuferzahnradpumpen
FR1504705A (fr) * 1966-10-24 1967-12-08 Système volumétrique à couple d'engrenages conjugués
US3758244A (en) * 1971-04-08 1973-09-11 Koerper Eng Ass Inc Rotary piston engine
JPH0756268B2 (ja) * 1987-07-27 1995-06-14 株式会社ユニシアジェックス オイルポンプ
JP2706475B2 (ja) * 1988-07-15 1998-01-28 日立粉末冶金株式会社 内側噛み合い歯車ポンプ
DE4133880A1 (de) * 1991-10-12 1993-04-15 Bosch Gmbh Robert Aggregat zum foerdern von kraftstoff aus einem vorratstank zur brennkraftmaschine eines fahrzeuges

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1027698A1 (fr) 2019-10-21 2021-05-18 Safran Aero Boosters Pompe volumétrique
BE1027697A1 (fr) 2019-10-21 2021-05-18 Safran Aero Boosters Pompe volumétrique
BE1027701A1 (fr) 2019-10-21 2021-05-18 Safran Aero Boosters Moteur-pompe

Also Published As

Publication number Publication date
ES2138137T3 (es) 2000-01-01
EP0736691A1 (de) 1996-10-09
DE69513142D1 (de) 1999-12-09
US5685704A (en) 1997-11-11
DE69513142T2 (de) 2000-08-17

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