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EP0123579A1 - Vorrichtung zum hydrostatischen Ausgleich für Zahnradpumpen oder-Motoren - Google Patents

Vorrichtung zum hydrostatischen Ausgleich für Zahnradpumpen oder-Motoren Download PDF

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Publication number
EP0123579A1
EP0123579A1 EP84400565A EP84400565A EP0123579A1 EP 0123579 A1 EP0123579 A1 EP 0123579A1 EP 84400565 A EP84400565 A EP 84400565A EP 84400565 A EP84400565 A EP 84400565A EP 0123579 A1 EP0123579 A1 EP 0123579A1
Authority
EP
European Patent Office
Prior art keywords
grooves
bearings
covers
compensation
seals
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.)
Granted
Application number
EP84400565A
Other languages
English (en)
French (fr)
Other versions
EP0123579B1 (de
Inventor
Roger Laumont
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.)
Hydroperfect International Inc
Original Assignee
Hydroperfect International Inc
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 Hydroperfect International Inc filed Critical Hydroperfect International Inc
Publication of EP0123579A1 publication Critical patent/EP0123579A1/de
Application granted granted Critical
Publication of EP0123579B1 publication Critical patent/EP0123579B1/de
Expired 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0023—Axial sealings for working fluid
    • F04C15/0026—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps

Definitions

  • the present invention relates to gear pumps or motors whose pinions carried by shafts are arranged between two bearings which are applied under pressure against the lateral faces of the pinions.
  • compensation chambers are delimited by partitions placed in grooves, these partitions forming in a way joints between the pads and the covers. It is the same in French patent 1,598,392 which uses seals arranged in grooves of the pump or motor body, these seals delimiting chambers of complex shape in which liquid is brought to a pressure which corresponds to that which is exerted on the opposite face of the bearing, that is to say that turned towards the pinions.
  • the invention solves this problem by making it possible to exert compensating pressures over the entire useful surface of the bearings of a pump or of a motor, regardless of the direction of rotation of the pinions.
  • the device for hydrostatic compensation of hydraulic pumps and motors of the gear type in which two engaged pinions are mounted on shafts which are supported by bearings or bearings which can slide inside the cavity d '' a pump or motor body closed on its lateral sides by covers, compensation chambers being provided between the bearings and the covers, is characterized in that said chambers are delimited by grooves respectively formed in the opposite faces of the pads and covers, a part of one side of the grooves provided in the bearings being aligned with one side of the grooves provided in the corresponding cover and deformable seals being disposed in said grooves.
  • Fig. 1 is a cross section of a hydraulic pump or gear motor of a type applying the invention.
  • Fig. 2 is a section seen substantially along line II-II of FIG. 1.
  • Fig. 3 is a partial section, partly schematic, seen substantially along line III-III of FIG. 2.
  • Fig. 4 is a very enlarged section of a detail of FIG. 3.
  • Fig. 5 is an elevation of one of the covers that includes the pump or motor of the previous figures.
  • Fig. 6 is a section taken along line VI-VI of FIG. 5.
  • the pump comprises a body 1 delimiting a cavity 2 of ovoid shape.
  • the body 1 is closed on each of its two sides by covers 3, 4 which are connected to the body 1 by centering pins 5.
  • the cavity 2 contains bearings or bearings 6, 7 which can slide in the cavity 2 with gentle friction .
  • the bearings 6, 7 support shafts 8 and 9 on which pinions 10 and 11 are fixed.
  • the shaft 8 constitutes the driving shaft and projects from the cover 3 while the shaft 9 is completely included inside the pump.
  • a seal 10a is provided on the shaft 8 to prevent any leakage of working liquid.
  • conduits 12 pass through the bearings to put the intents of the pinions 10, 11 into communication with the very thin space which separates the other side of the pads from the covers.
  • the intake 12a and discharge 12b conduits are also placed in communication with the space between the covers and the bearings.
  • Each space between each pad and each corresponding cover is delimited by seals to correspond to the zones of different pressures.
  • Fig. 2 shows an annular seal 13 ensuring the seal between the cover 4 and the body 1 of the seal 14, 14a for upper and lower compensation chambers 15, respectively 15a, a median seal 16 corresponding to the engagement part of the pinions and two bilateral seals 17, 17a which delimit compensation, inlet and outlet zones.
  • the annular seal 13 is arranged in a groove 131 (fig. 5) formed in each cover which also has grooves 14 1 , 14a 1 for the seals 14, 14a.
  • Grooves 171, respectively 17a 1 are provided in the face of each pad 6, 7 facing the corresponding cover, one of the edges of the grooves 17a 1 being aligned with the edges of the grooves 14 1 , 14a 1 and with the edges of the groove 161 containing the middle seal 16.
  • FIG. 4 shows, by way of example and to illustrate the arrangement of the various joints described, two grooves A and B each containing a joint A respectively B 1 , these grooves being provided one in a cover C, the other in a pad D.
  • Fig. 4 also shows that the grooves can be at a sharp angle because it is advantageous, according to the invention, that the pressure which is exerted in the space separating the cover of the bearing is exerted even inside the spokes nures and, therefore, tends to apply the seal contained in each groove on the face of the opposite element, that is to say that the seal applied against the bearing is tight, or even deformed, in the groove of the cover which contains it and vice versa.
  • the parts of the seals A 1 and B 1 each contain a side seal A ", respectively B", for example made of polyamide, when the seals are made of elastomer.
  • the above linings be made of a harder material than that of the seals but having a low coefficient of friction so that said linings cannot undergo an extrusion effect due to the pressure which s 'exercises on the joints.
  • the grooves 17 1 , 17a 1 containing the seals 17, 17a are erased at their ends as shown at 18 in FIG. 2 and that the elastomer part A 1 forms a heel 18 1 to ensure that the pressures exerted in the compensation, inlet and outlet chambers always tend to maintain the lining A "against the external edge of the groove while the heel 18 1 is itself applied against the internal wall of the ovoid cavity 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Hydraulic Motors (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP84400565A 1983-03-22 1984-03-20 Vorrichtung zum hydrostatischen Ausgleich für Zahnradpumpen oder-Motoren Expired EP0123579B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8304650A FR2543229B1 (fr) 1983-03-22 1983-03-22 Dispositif pour la compensation hydrostatique de pompes et moteurs hydrauliques du type a engrenage
FR8304650 1983-03-22

Publications (2)

Publication Number Publication Date
EP0123579A1 true EP0123579A1 (de) 1984-10-31
EP0123579B1 EP0123579B1 (de) 1986-09-10

Family

ID=9287092

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400565A Expired EP0123579B1 (de) 1983-03-22 1984-03-20 Vorrichtung zum hydrostatischen Ausgleich für Zahnradpumpen oder-Motoren

Country Status (21)

Country Link
US (1) US4527966A (de)
EP (1) EP0123579B1 (de)
JP (1) JPS6011691A (de)
KR (1) KR860000960B1 (de)
AR (1) AR230757A1 (de)
AT (1) ATE22161T1 (de)
AU (1) AU2593684A (de)
BR (1) BR8401311A (de)
CA (1) CA1221876A (de)
CS (1) CS252815B2 (de)
DD (1) DD216768A5 (de)
DE (2) DE3460661D1 (de)
DK (1) DK160084A (de)
ES (1) ES530833A0 (de)
FR (1) FR2543229B1 (de)
HU (1) HUT39840A (de)
IL (1) IL71306A0 (de)
IN (1) IN160317B (de)
NO (1) NO841123L (de)
NZ (1) NZ207553A (de)
RO (1) RO92213B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3521660A1 (de) * 1984-06-21 1986-01-02 Dowty Hydraulic Units Ltd., Cheltenham, Gloucestershire Volumetrische druckmittelmaschine
FR2605361A1 (fr) * 1986-10-20 1988-04-22 Sauer Sundstrand Spa Machine a engrenages destinee a etre utilisee en tant que pompe ou moteur et garniture d'etancheite utilisable dans une telle machine
EP0563661A1 (de) * 1992-03-19 1993-10-06 J.M. Voith GmbH Sichellose Innenzahnradpumpe mit radial beweglichen Dichtelementen zur Radialkompensation

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2574517B1 (fr) * 1984-12-10 1988-09-02 Hydroperfect Int Joint d'etancheite et son application a la realisation de la compensation hydrostatique de pompes et moteurs hydrauliques
DE3766245D1 (de) * 1987-04-24 1990-12-20 Vickers Systems Gmbh Zahnradpumpe oder -motor fuer fluide.
IT1220330B (it) * 1988-04-08 1990-06-15 Sauer Sundstrand Spa Macchina ad ingranaggi fungente da pompa o motore
US5022837A (en) * 1989-11-13 1991-06-11 Sta-Rite Industries, Inc. Seal arrangement for a gear machine
JPH10274171A (ja) * 1997-01-31 1998-10-13 United Dominion Ind Inc 定位置洗浄ギヤポンプ
JP3932595B2 (ja) * 1997-03-12 2007-06-20 株式会社日立製作所 ギヤポンプ
FR2772839B1 (fr) 1997-12-19 2000-02-11 Hydroperfect Int Pompe a carburant, notamment essence, en particulier pour l'injection directe du carburant dans un moteur a combustion interne, groupe electro-pompe comportant une telle pompe et vehicule automobile equipe d'un tel groupe electro-pompe
US6902382B2 (en) * 2003-09-11 2005-06-07 Matthew Peter Christensen Gear motor start up control

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2010711A1 (de) * 1968-06-12 1970-02-20 Gen Signal Corp
DE1553262A1 (de) * 1960-04-29 1970-07-16 Webster Electric Co Inc Zahnradpumpe
FR2023367A1 (de) * 1968-11-15 1970-08-21 Turolla Marco
FR2215103A5 (de) * 1973-01-23 1974-08-19 Hydroperfect Int
FR2221019A7 (de) * 1973-03-06 1974-10-04 Bosch Gmbh Robert

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3291053A (en) * 1965-01-14 1966-12-13 Clark Equipment Co Thrust bearing for pump or motor
GB2051241B (en) * 1979-06-16 1983-03-16 Dowty Hydraulic Units Ltd Rotary positive-displacement fluid-pressure machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1553262A1 (de) * 1960-04-29 1970-07-16 Webster Electric Co Inc Zahnradpumpe
FR2010711A1 (de) * 1968-06-12 1970-02-20 Gen Signal Corp
FR2023367A1 (de) * 1968-11-15 1970-08-21 Turolla Marco
FR2215103A5 (de) * 1973-01-23 1974-08-19 Hydroperfect Int
FR2221019A7 (de) * 1973-03-06 1974-10-04 Bosch Gmbh Robert

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3521660A1 (de) * 1984-06-21 1986-01-02 Dowty Hydraulic Units Ltd., Cheltenham, Gloucestershire Volumetrische druckmittelmaschine
FR2605361A1 (fr) * 1986-10-20 1988-04-22 Sauer Sundstrand Spa Machine a engrenages destinee a etre utilisee en tant que pompe ou moteur et garniture d'etancheite utilisable dans une telle machine
EP0563661A1 (de) * 1992-03-19 1993-10-06 J.M. Voith GmbH Sichellose Innenzahnradpumpe mit radial beweglichen Dichtelementen zur Radialkompensation

Also Published As

Publication number Publication date
BR8401311A (pt) 1984-10-30
RO92213B (ro) 1987-07-31
ATE22161T1 (de) 1986-09-15
DK160084A (da) 1984-09-23
FR2543229A1 (fr) 1984-09-28
ES8500394A1 (es) 1984-11-01
US4527966A (en) 1985-07-09
RO92213A (ro) 1987-07-30
EP0123579B1 (de) 1986-09-10
NZ207553A (en) 1986-07-11
AU2593684A (en) 1984-09-27
HUT39840A (en) 1986-10-29
KR860000960B1 (ko) 1986-07-23
FR2543229B1 (fr) 1985-08-16
CA1221876A (en) 1987-05-19
IN160317B (de) 1987-07-04
NO841123L (no) 1984-09-24
DE123579T1 (de) 1985-04-25
CS207284A2 (en) 1987-03-12
IL71306A0 (en) 1984-06-29
AR230757A1 (es) 1984-06-29
DD216768A5 (de) 1984-12-19
CS252815B2 (en) 1987-10-15
DK160084D0 (da) 1984-03-20
ES530833A0 (es) 1984-11-01
KR840008035A (ko) 1984-12-12
DE3460661D1 (en) 1986-10-16
JPS6011691A (ja) 1985-01-21

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