EP0064239A1 - Pompe ou moteur à engrenages - Google Patents
Pompe ou moteur à engrenages Download PDFInfo
- Publication number
- EP0064239A1 EP0064239A1 EP82103446A EP82103446A EP0064239A1 EP 0064239 A1 EP0064239 A1 EP 0064239A1 EP 82103446 A EP82103446 A EP 82103446A EP 82103446 A EP82103446 A EP 82103446A EP 0064239 A1 EP0064239 A1 EP 0064239A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gear
- floating
- shaft
- housing
- gear wheel
- 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
Links
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 244000287353 Crassocephalum crepidioides Species 0.000 abstract description 2
- 206010016322 Feeling abnormal Diseases 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Images
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
Definitions
- the invention relates to a gear pump or motor, consisting of a housing in which at least two intermeshing gears are arranged, one of which is firmly seated on a shaft, while the other is floating on a liquid film mounted close to the inner wall of the housing, wherein the teeth of the gears have head surfaces.
- the invention is therefore based on the object of reducing the wear on the teeth of the gear wheels and on the inner wall of the housing and thereby increasing the service life of the device.
- top surfaces of the floating gear have a greater thickness than the top surfaces of the shaft-mounted gear.
- the gears expediently have involute teeth in the usual way.
- the sum of the top surface thicknesses of the floating gear wheel is 30 to 50%, preferably 40% of the circumference of this gear wheel.
- the thickness of the head surfaces of the floating gear wheel can advantageously be at least twice as large as that of the head surfaces of the shaft gear wheel.
- This new tooth shape in the floating gearwheel increases its bearing surface on the liquid film inside the housing, which results in an improved mounting of this gearwheel and thereby less frictional wear.
- the improvement in storage achieved corresponds approximately to that achieved by a gear shaft.
- Figure 1 shows a gear pump or a gear motor 10 with a housing 12 which has an inlet 14 and an outlet 16.
- a gear pump or a gear motor 10 with a housing 12 which has an inlet 14 and an outlet 16.
- Each tooth 24 has a head surface 25 of relatively narrow thickness.
- the other gear 20 is floating, so it does not sit on a shaft and also has a plurality of teeth 26, each having a head surface 27, the thickness of which is at least twice as large as that of the head surfaces 25 of the shaft-mounted gear 18
- Teeth 26 of the floating gear wheel 20 preferably have an involute profile.
- the floating gear wheel 20 rotates on a liquid film in the immediate vicinity of the inner wall 28 of the housing 12.
- liquid from the inlet 14 around the circumference of the two gear wheels 18, 20 comes out of the housing 12 pressed through the outlet 16.
- the shaft 22 In normal pump operation, the shaft 22 is driven so that gear 18 is the drive wheel and gear 20 is the driven wheel. In motor operation, the flowing liquid forms the driving force for the two gear wheels and leads to a rotation of the shaft 22, which can then drive another element, for example a belt drive.
- Figure 2 shows a single tooth 26 of the floating gear 20 with its relatively thick head surface 27, the thickness of which is indicated by the letter a, while the width of the tooth flank 30 is identified by the letter b.
- the sum of the thicknesses a of all head surfaces 27 of the teeth 26 of the floating gear wheel 20 is approximately between 30 and 50%, preferably approximately 40% of the circumference of the floating gear wheel 20. This increased thickness of the head surfaces 27 extends the life of the floating gear wheel 20, since this reduces frictional wear between the floating gear 20 and the inner wall 28 of the housing 12.
- FIG. 2 shows that the two side edges 31, 32 of each head surface 27 lying parallel to the central axis of the floating gear wheel 20 are chamfered and enclose an angle ⁇ of 10 to 30 ° with the head surface.
- These chamfered side edges 31, 32 facilitate the build-up of a liquid film between the head surfaces 27 and the inner wall 28 of the housing 12, when the floating gear 20 rotates in the housing 12.
- the structure of this liquid film leads to a reduction in frictional wear and thus to an extension of the. Device life.
- the end edges 33 of the head surfaces 27, which lie on one end face and perpendicular to the central axis of the floating gear wheel 20 or perpendicular to the side edges 31, 32, are chamfered and close an angle with the head surface 27 from 30 to 50 °.
- This chamfered end edge 33 is advantageous when assembling the device, in particular when the floating gear wheel 20 is inserted into a round bore or recess that has been screwed into the housing 12.
- the chamfered end edge 33 now allows the gear wheel 20 to be fully inserted into the corresponding bore in the housing.
- the inclusion of liquid between the bottom of the housing recess and the end face of the gear 20 is prevented. By avoiding squeezing liquid, the efficiency of the device is increased.
- FIG. 3 shows a modified embodiment of a gear pump or a gear motor 11.
- Two floating gear wheels 20, 21 are provided, which mesh with a single gear wheel 18, which is seated firmly on a rotatable shaft 22. Since there are two combing zones here, two inlets 14, 15 and two outlets 16, 17 must also be provided in the housing 12. In this device there are two in opposite Direction of flowing liquid flows.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Valve Device For Special Equipments (AREA)
- Hydraulic Motors (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT82103446T ATE11806T1 (de) | 1981-05-04 | 1982-04-23 | Zahnradpumpe oder -motor. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/260,142 US4386893A (en) | 1981-05-04 | 1981-05-04 | Gear pump or motor with a shaftless gear |
US260142 | 1988-10-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0064239A1 true EP0064239A1 (fr) | 1982-11-10 |
EP0064239B1 EP0064239B1 (fr) | 1985-02-13 |
Family
ID=22987941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82103446A Expired EP0064239B1 (fr) | 1981-05-04 | 1982-04-23 | Pompe ou moteur à engrenages |
Country Status (9)
Country | Link |
---|---|
US (1) | US4386893A (fr) |
EP (1) | EP0064239B1 (fr) |
JP (1) | JPS57186081A (fr) |
AT (1) | ATE11806T1 (fr) |
BR (1) | BR8202516A (fr) |
CA (1) | CA1180228A (fr) |
DE (1) | DE3262290D1 (fr) |
ES (1) | ES279686Y (fr) |
ZA (1) | ZA823016B (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0833056A3 (fr) * | 1997-12-23 | 1998-07-15 | Maag Pump Systems Textron AG | Procédé pour le positionnement d'arbre et pompe à engrenages |
US6283734B1 (en) | 1997-12-23 | 2001-09-04 | Maag Pump Systems Textron Ag | Gear pump and a method for positioning a gear pump shaft |
DE102012205406A1 (de) * | 2012-04-03 | 2013-10-10 | Robert Bosch Gmbh | Hydrostatische Verdrängermaschine mit gekrümmter Eingriffslinie und Flankenlinienrücknahme |
EP2674570A1 (fr) * | 2012-06-14 | 2013-12-18 | Bobby Boucher | Charnière avec déverrouillage automatique mécanique |
DE102013226852A1 (de) * | 2013-12-20 | 2015-06-25 | Volkswagen Aktiengesellschaft | Zahnradpumpe |
WO2015134194A1 (fr) * | 2014-03-07 | 2015-09-11 | Parker-Hannifin Corporation | Système de pompe à trois roues dentées pour fluides à faible viscosité |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6042352A (en) * | 1998-08-12 | 2000-03-28 | Argo-Tech Corporation | Bearing with pulsed bleed configuration |
DE10337475A1 (de) * | 2003-08-08 | 2005-03-03 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Verstellgetriebe für ein Kraftfahrzeug |
US7591640B2 (en) * | 2006-08-30 | 2009-09-22 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Three gear type gear pump of a fuel supply system |
US8087913B2 (en) * | 2008-12-22 | 2012-01-03 | Hamilton Sundstrand Corporation | Gear pump with unequal gear teeth on drive and driven gear |
CN101852091A (zh) * | 2010-05-13 | 2010-10-06 | 石家庄中煤装备制造有限公司 | 一种节能高效的气动马达 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2626570A (en) * | 1947-06-13 | 1953-01-27 | Euclid Road Machinery Co | Floating gear pump |
DE1140462B (de) * | 1956-12-11 | 1962-11-29 | Karl Torsten Kaelle | Zahnradpumpe |
US3286643A (en) * | 1963-10-14 | 1966-11-22 | Dowty Technical Dev Ltd | Gear pumps and motors |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US137056A (en) * | 1873-03-25 | Improvement in rotary engines or pumps | ||
US2699122A (en) * | 1952-05-27 | 1955-01-11 | Gen Motors Corp | Multiple gear fluid pump |
US2760381A (en) * | 1952-10-22 | 1956-08-28 | Hupp Corp | Construction of gear teeth |
US3120190A (en) * | 1961-03-02 | 1964-02-04 | Falk Corp | Gear pump |
GB1057282A (en) * | 1963-04-19 | 1967-02-01 | John Wilmott Marshall | Rotary internal combustion engines and fluid motors |
JPS5465806A (en) * | 1977-11-04 | 1979-05-26 | Asahi Engineering | Gear pump |
DE2824762A1 (de) * | 1978-06-06 | 1979-12-13 | Bosch Gmbh Robert | Zahnradmaschine (pumpe oder motor) |
-
1981
- 1981-05-04 US US06/260,142 patent/US4386893A/en not_active Expired - Fee Related
-
1982
- 1982-04-08 CA CA000400690A patent/CA1180228A/fr not_active Expired
- 1982-04-23 AT AT82103446T patent/ATE11806T1/de not_active IP Right Cessation
- 1982-04-23 EP EP82103446A patent/EP0064239B1/fr not_active Expired
- 1982-04-23 DE DE8282103446T patent/DE3262290D1/de not_active Expired
- 1982-04-30 BR BR8202516A patent/BR8202516A/pt unknown
- 1982-04-30 JP JP57073296A patent/JPS57186081A/ja active Pending
- 1982-05-03 ZA ZA823016A patent/ZA823016B/xx unknown
- 1982-05-03 ES ES1982279686U patent/ES279686Y/es not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2626570A (en) * | 1947-06-13 | 1953-01-27 | Euclid Road Machinery Co | Floating gear pump |
DE1140462B (de) * | 1956-12-11 | 1962-11-29 | Karl Torsten Kaelle | Zahnradpumpe |
US3286643A (en) * | 1963-10-14 | 1966-11-22 | Dowty Technical Dev Ltd | Gear pumps and motors |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0833056A3 (fr) * | 1997-12-23 | 1998-07-15 | Maag Pump Systems Textron AG | Procédé pour le positionnement d'arbre et pompe à engrenages |
US6283734B1 (en) | 1997-12-23 | 2001-09-04 | Maag Pump Systems Textron Ag | Gear pump and a method for positioning a gear pump shaft |
DE102012205406A1 (de) * | 2012-04-03 | 2013-10-10 | Robert Bosch Gmbh | Hydrostatische Verdrängermaschine mit gekrümmter Eingriffslinie und Flankenlinienrücknahme |
EP2674570A1 (fr) * | 2012-06-14 | 2013-12-18 | Bobby Boucher | Charnière avec déverrouillage automatique mécanique |
DE102013226852A1 (de) * | 2013-12-20 | 2015-06-25 | Volkswagen Aktiengesellschaft | Zahnradpumpe |
WO2015134194A1 (fr) * | 2014-03-07 | 2015-09-11 | Parker-Hannifin Corporation | Système de pompe à trois roues dentées pour fluides à faible viscosité |
Also Published As
Publication number | Publication date |
---|---|
DE3262290D1 (en) | 1985-03-28 |
JPS57186081A (en) | 1982-11-16 |
EP0064239B1 (fr) | 1985-02-13 |
ES279686U (es) | 1985-06-16 |
BR8202516A (pt) | 1983-04-12 |
ATE11806T1 (de) | 1985-02-15 |
ZA823016B (en) | 1983-12-28 |
ES279686Y (es) | 1986-04-01 |
US4386893A (en) | 1983-06-07 |
CA1180228A (fr) | 1985-01-02 |
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