EP0064239B1 - Pompe ou moteur à engrenages - Google Patents

Pompe ou moteur à engrenages Download PDF

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Publication number
EP0064239B1
EP0064239B1 EP82103446A EP82103446A EP0064239B1 EP 0064239 B1 EP0064239 B1 EP 0064239B1 EP 82103446 A EP82103446 A EP 82103446A EP 82103446 A EP82103446 A EP 82103446A EP 0064239 B1 EP0064239 B1 EP 0064239B1
Authority
EP
European Patent Office
Prior art keywords
gear
housing
gears
shaft
floatingly mounted
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
Application number
EP82103446A
Other languages
German (de)
English (en)
Other versions
EP0064239A1 (fr
Inventor
Herbert Joseph Hauser, Jr.
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Priority to AT82103446T priority Critical patent/ATE11806T1/de
Publication of EP0064239A1 publication Critical patent/EP0064239A1/fr
Application granted granted Critical
Publication of EP0064239B1 publication Critical patent/EP0064239B1/fr
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
    • F04C2/082—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 floating gear moves away from the shaft-mounted gear, so that more and more liquid remains in the tooth gaps of the meshing gears instead of exiting the pump or the motor. If the efficiency of the pump or motor falls below a predetermined value, the entire device must be replaced.
  • the above-described gear pump can be US - A - 2,626,570 refer.
  • the teeth of the two gears are identical; this corresponds to all previously known embodiments.
  • the inner circumferential wall of the housing which is immediately adjacent to the circumferential head surfaces of the two gearwheels, is drawn as far as possible around the two gearwheels and extends like a nose into the area between the two gearwheels.
  • the largest possible storage area should be created for the two gears, which is considered necessary in particular for the gear sitting on a shaft, and thereby preventing the gears from jumping inside the housing.
  • 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.
  • FIG. 1 shows a gear pump or 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 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. When the two gear wheels 18, 20 mesh with one another, liquid flows from the inlet 14 around the circumference of the two gear wheels 18, 20 out of the housing 12 pressed through the outlet 16.
  • the shaft 22 In normal pump operation, the shaft 22 is driven so that the gear 18 is the drive wheel and the gear 20 is the driven wheel.
  • the strö Mende liquid In engine operation, the strö Mende liquid, the driving force for the two gears and leads to a rotation of the shaft 22, which is then another element, for. B. can drive a belt drive.
  • Fig. 2 shows a single tooth 26 of the floating gear 20 with its relatively thick top 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 wheel 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 formation of a liquid film between the head surfaces 27 and the inner wall 28 of the housing 12 when the floating gear wheel 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 life of the device.
  • the end edges 33 of the head surfaces 27 lying on one end face and perpendicular to the central axis of the floating gearwheel 20 or perpendicular to the side edges 31, 32 are chamfered and form an angle a 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 a complete insertion of the gear 2Q into the corresponding hole 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 18, which is fixed 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, two current flowing in the opposite direction remplissigkei give t sströme.

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)
  • Valve Device For Special Equipments (AREA)

Claims (7)

1. Pompe ou moteur à engrenages (10, 11) comportant un carter (12) dans lequel sont disposés au moins deux pignons (18, 20, 21) engrenant l'un avec l'autre, parmi lesquels l'un (18) est calé sur un arbre (22), tandis que l'autre (20, 21) est monté de façon flottante sur un film de liquide au voisinage immédiat de la paroi intérieure (28) du carter (12), les dents (24, 26) des pignons présentant des surfaces de crêtes (25, 27), caractérisé en ce que les surfaces de crêtes (27) du pignon (20, 21) monté de façon flottante présentent une épaisseur ou largeur (a) plus grande que les surfaces de crêtes (25) du pignon (18) monté sur l'arbre.
2. Pompe ou moteur à engrenages suivant la revendication 1, caractérisé en ce que la somme des largeurs (a) des surfaces de crêtes du pignon (20, 21) monté de façon flottante représente de 30 à 50% de la circonférence de ce pignon (20, 21).
3. Pompe ou moteur à engrenages suivant la revendication 2, caractérisé en ce que la somme des largeurs (a) des surfaces de crêtes du pignon (20,21) monté de façon flottante représente 40% de la circonférence de ce pignon (20,21).
4. Pompe ou moteur à engrenages suivant la revendication 1, 2 ou 3, caractérisé en ce que la largeur (a) des surfaces de crêtes (27) du pignon (20,21) monté de façon flottante est au moins le double de celle des surfaces de crêtes (25) du pignon (18) monté sur l'arbre.
5. Pompe ou moteur à engrenages suivant l'une quelconque des revendications précédentes, caractérisé en ce que les deux arêtes latérales (31, 32) parallèles à l'axe central du pignon (20, 21) monté de façon flottante de chaque surface de crête (27) sont biseautées et forment avec la surface de crête un angle (0) de 10 à 30°.
6. Pompe ou moteur à engrenages suivant l'une quelconque des revendications précédentes, caractérisé en ce que les arêtes terminales (33) des surfaces de crêtes (27) disposées sur une face terminale et perpendiculaires à l'axe central du pignon (20, 21) monté de façon flottante sont biseautées et forment avec la surface de crête (27) un angle (a) de 30 à 50°.
7. Pompe ou moteur suivant l'une quelconque des revendications précédentes, caractérisé en ce que deux ou plusieurs pignons (20, 21) montés de façon flottante engrènent avec le pignon (18) monté sur l'arbre.
EP82103446A 1981-05-04 1982-04-23 Pompe ou moteur à engrenages Expired EP0064239B1 (fr)

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 1981-05-04

Publications (2)

Publication Number Publication Date
EP0064239A1 EP0064239A1 (fr) 1982-11-10
EP0064239B1 true 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)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11247767A (ja) 1997-12-23 1999-09-14 Maag Pump Syst Textron Ag 歯車ポンプの軸を位置決めするための方法および歯車ポンプ
EP0833056B1 (fr) * 1997-12-23 2004-09-29 Maag Pump Systems Textron AG Procédé pour le positionnement d'arbre et pompe à engrenages
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
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
EP3114350B1 (fr) * 2014-03-07 2021-06-30 Nichols Portland, LLC Système de pompe à trois roues dentées pour fluides à faible viscosité

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US137056A (en) * 1873-03-25 Improvement in rotary engines or pumps
US2626570A (en) * 1947-06-13 1953-01-27 Euclid Road Machinery Co Floating gear pump
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
DE1140462B (de) * 1956-12-11 1962-11-29 Karl Torsten Kaelle Zahnradpumpe
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
US3286643A (en) * 1963-10-14 1966-11-22 Dowty Technical Dev Ltd Gear pumps and 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)

Also Published As

Publication number Publication date
ATE11806T1 (de) 1985-02-15
ES279686Y (es) 1986-04-01
CA1180228A (fr) 1985-01-02
US4386893A (en) 1983-06-07
JPS57186081A (en) 1982-11-16
ES279686U (es) 1985-06-16
ZA823016B (en) 1983-12-28
DE3262290D1 (en) 1985-03-28
BR8202516A (pt) 1983-04-12
EP0064239A1 (fr) 1982-11-10

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