EP0377617A1 - Gearwheel motor. - Google Patents
Gearwheel motor.Info
- Publication number
- EP0377617A1 EP0377617A1 EP88907605A EP88907605A EP0377617A1 EP 0377617 A1 EP0377617 A1 EP 0377617A1 EP 88907605 A EP88907605 A EP 88907605A EP 88907605 A EP88907605 A EP 88907605A EP 0377617 A1 EP0377617 A1 EP 0377617A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- control valve
- sealing plate
- gear motor
- gear
- 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
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
- 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 invention relates to a gear motor according to the preamble of the main claim.
- the disadvantage of such a known gear motor is that the pressure medium control between the pre-pressure field and the main pressure field does not function satisfactorily, so that the pressure build-up in the main pressure field does not take place properly.
- the gear motor according to the invention with the characterizing features of the main claim has the advantage that the control of the pre and the main pressure field is unproblematic. This improves the functionality of the gear motor.
- FIG. 1 shows a longitudinal section through a gear motor
- FIG. 2 shows a section along II-II according to FIG. 1
- FIG. 3 shows a schematic diagram
- FIG. 4 shows a modification of the exemplary embodiment according to FIG. 1
- FIG. 5 shows a schematic diagram. Description of the invention example
- the gear motor has a housing 10, the interior 11 of which has approximately the cross-sectional shape of an eight, which is closed on both sides by covers 12, 13.
- two toothed wheels 14, 15 mesh with one another in external engagement, the bright teeth 16, 17 of which are mounted in spectacle-shaped bearing bodies 18, 19.
- Bearing bodies of this type are generally known and are therefore not described further.
- a passage 20 is formed in the cover 13, through which an extension 23 of the shaft 17 penetrates to the outside; it is sealed there by a sealing ring 24 and forms the output shaft.
- a sealing plate 26 is arranged between the bearing body 18 and the adjacent side surfaces of the gear wheels 14, 15, which also has the contour of the housing interior and covers the entire surface of the gear wheels. On its back side, two pressure fields are effective, as described below.
- Figure 2 shows i.a. a plan view of the bearing body 18, namely from its end face facing the sealing plate 26.
- a first use 27 running close to the outer contour of the bearing body, which partially runs concentrically to the gear shaft and extends from the high pressure side HD to the low pressure side ND but does not extend up to this.
- the Nutzug 27 ends in two groove ends 27A, 27B, which penetrate to the edge of the bearing body.
- a seal 28 made of rubber-elastic material is arranged in this groove train.
- a second tool 29 which also extends from the high pressure side to the low pressure side, its ends 29A, 29B penetrating further to the low pressure side than the groove ends of the tool 27.
- Usage 29 also has in its central area there is an indentation 29C which leads approximately to an imaginary straight line connecting the shaft centers.
- a seal 30, which likewise consists of a rubber-elastic material, is suitably arranged in the groove 29.
- the high-pressure side HD is characterized by a recess 31, into which the high-pressure bore 32 penetrates from the outside of the housing, namely at the level of the gearwheels 14, 15.
- the low-pressure side ND is characterized by a recess 33, in which an axis coincides with the high-pressure bore 32 extending low pressure bore 34 penetrates, which also starts from the outside of the housing.
- the sealing plate 26 which is to be pressed against the gearwheel side surfaces only with a small force when starting.
- This pressing force results from two pressure fields, namely a so-called pre-pressure field A and a main pressure field B.
- the pre-pressure field A is delimited by the seal 28 and extends in the area radially outside of this seal - that is, between it and the housing wall - as well as in the area which lies below the surface of the seal 28 itself.
- the main pressure field B is formed by an area which lies between the seal 28 and the seal 30 - in particular also by the field 35 - and also lies below the surface of the seal 30.
- the pre-pressure field A is acted upon from the recess 31 - ie the delivery pressure P of the pump 43 prevails in the pre-pressure field A - the main pressure field is acted upon by a lower pressure, which is determined in particular by the throttle bore 36.
- the pressure in the main pressure field is a so-called control pressure Ps, which is determined by the valve 41.
- the pressure in the main pressure field B is fed via the throttle bore 36 from the tooth chambers. If the valve 41 is opened strongly, the pressure Ps in the main pressure field is low, if the valve 41 is closed, the pressure Ps is high.
- the friction force is negligible.
- the valve 41 can be designed as a switching valve or as a proportional valve - both electromagnetically actuated. It can e.g. B. the pulse length can be modulated. This entire process can be seen schematically in FIG. 3.
- the sealing plate 26 is symbolically represented here as a pressure valve 26, since it in itself performs a relief function such as a pressure limiting valve.
- FIG. 4 and the schematically illustrated embodiment according to FIG. 5 relate to a modification of the above exemplary embodiment.
- the switching valve - now designated 50 - is no longer externally controlled here, i. H. z. B. by an electromagnet, but by the pressure in a line 49 branching from the delivery line 42 of the pump against the force of a spring 51. This also ensures a reliable start of the gear motor. An excessive load torque or a blocking immediately leads to the relief (lifting off) of the sealing plate 26 by the amount of the braking torque of the pressing plate. In this way, the maximum possible torque is taken from the gear motor.
- the switching valve is expediently arranged in the cover 12 of the gear motor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Hydraulic Motors (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Moteur turbinaire à engrenages comportant deux roues dentées (14, 15) à contact externe mutuel, sur les surfaces latérales desquelles une plaque d'étanchéité (26) est appliquée par deux champs de compression (A, B) approximativement concentriques. Les deux champs de compression ne communiquent pas l'un avec l'autre. On peut commander la pression d'un champ de compression (B) au moyen d'une soupape de régulation (41) à commande électromagnétique, modifiant ainsi la force de compression de la plaque d'étanchéité (26) sur les roues dentées. Lorsque l'on démarre le moteur turbinaire à engrenages, la force de compression doit être faible de sorte que la résistance de démarrage puisse également être faible. Lors de pressions élevées, la force de compression est augmentée par fermeture de la soupape, ce qui évite une fuite d'huile le long des roues dentées, à partir du côté à pression élevée jusqu'au côté à basse pression.Geared turbine engine comprising two toothed wheels (14, 15) with mutual external contact, on the side surfaces of which a sealing plate (26) is applied by two compression fields (A, B) approximately concentric. The two compression fields do not communicate with each other. The pressure of a compression field (B) can be controlled by means of an electromagnetically controlled regulating valve (41), thereby changing the compressive force of the sealing plate (26) on the sprockets. When starting the gear turbine engine, the compressive force should be low so that the starting resistance can also be low. At high pressures, the compressive force is increased by closing the valve, which prevents oil leakage along the gears from the high pressure side to the low pressure side.
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8712245 | 1987-09-10 | ||
DE8712245U | 1987-09-10 | ||
DE8806388U | 1988-05-14 | ||
DE8806388U DE8806388U1 (en) | 1987-09-10 | 1988-05-14 | Gear motor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0377617A1 true EP0377617A1 (en) | 1990-07-18 |
EP0377617B1 EP0377617B1 (en) | 1991-09-18 |
Family
ID=25952038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19880907605 Expired - Lifetime EP0377617B1 (en) | 1987-09-10 | 1988-09-02 | Gearwheel motor |
Country Status (5)
Country | Link |
---|---|
US (1) | US5052905A (en) |
EP (1) | EP0377617B1 (en) |
JP (1) | JPH03500194A (en) |
DE (2) | DE8806388U1 (en) |
WO (1) | WO1989002515A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3816537A1 (en) * | 1988-05-14 | 1989-11-23 | Bosch Gmbh Robert | GEAR PUMP |
DE3902139A1 (en) * | 1989-01-25 | 1990-07-26 | Bosch Gmbh Robert | HYDROSTATIC DRIVE |
DE3919939C2 (en) * | 1989-06-19 | 1998-07-30 | Bosch Gmbh Robert | Hydrostatic drive |
DE3923518A1 (en) * | 1989-07-15 | 1991-01-17 | Bosch Gmbh Robert | Gear pump with externally meshing gears - incorporates control pipe for load sensing pressure |
DE3924482A1 (en) * | 1989-07-25 | 1991-02-07 | Bosch Gmbh Robert | GEAR PUMP |
DE3931186C2 (en) * | 1989-09-19 | 1999-12-16 | Bosch Gmbh Robert | Gear motor |
DE3938135A1 (en) * | 1989-11-16 | 1991-05-23 | Bosch Gmbh Robert | GEAR PUMP |
DE4124466C2 (en) * | 1991-07-24 | 1999-04-01 | Bosch Gmbh Robert | Gear machine (pump or motor) |
JP4333422B2 (en) * | 2003-06-02 | 2009-09-16 | 株式会社島津製作所 | Gear pump or motor |
US20070201989A1 (en) * | 2005-10-14 | 2007-08-30 | Parker-Hannifin | Low ripple gear pump/motor |
US8998496B2 (en) * | 2012-03-30 | 2015-04-07 | Imo Industries, Inc. | Gear pump with asymmetrical dual bearing |
CN103939334B (en) * | 2013-01-17 | 2017-06-06 | 常州雷利电机科技有限公司 | Gear pump |
DE102014208021A1 (en) * | 2014-04-29 | 2015-10-29 | Robert Bosch Gmbh | Gear machine with eccentricity on the gears |
US10544867B2 (en) * | 2017-10-30 | 2020-01-28 | Saudi Arabian Oil Company | Spectacle blinds swinging device |
US11060559B2 (en) * | 2018-06-11 | 2021-07-13 | Eaton Intelligent Power Limited | Bi-metallic journal bearing with additive manufactured sleeve |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3175468A (en) * | 1962-04-05 | 1965-03-30 | Cessna Aircraft Co | Fluid motor with delayed pressure loading |
DE1553133A1 (en) * | 1966-12-23 | 1970-07-30 | Maag Zahnraeder & Maschinen Ag | High pressure gear pump |
DE2349304C3 (en) * | 1973-10-01 | 1981-07-16 | Robert Bosch Gmbh, 7000 Stuttgart | Gear motor operated with hydraulic fluid |
JPS5543220A (en) * | 1978-09-19 | 1980-03-27 | Kayaba Ind Co Ltd | Terminal structure of seal to demarcate gear pump or high pressure area and low pressure area in motor |
DE2846547A1 (en) * | 1978-10-26 | 1980-04-30 | Pierburg Luftfahrtgeraete | SELF-SEALING GEAR PUMP |
DE2855567A1 (en) * | 1978-12-22 | 1980-06-26 | Duesterloh Gmbh | Rotary seal strip for gear pump or motor - has spring loaded oil-pressurised seal elements set via throttle with pressure limited by valve |
DE3605246C2 (en) * | 1986-02-19 | 1993-11-25 | Bosch Gmbh Robert | Gear machine (pump or motor) |
-
1988
- 1988-05-14 DE DE8806388U patent/DE8806388U1/en not_active Expired
- 1988-09-02 US US07/490,659 patent/US5052905A/en not_active Expired - Fee Related
- 1988-09-02 WO PCT/DE1988/000541 patent/WO1989002515A1/en active IP Right Grant
- 1988-09-02 EP EP19880907605 patent/EP0377617B1/en not_active Expired - Lifetime
- 1988-09-02 DE DE8888907605T patent/DE3865019D1/en not_active Expired - Lifetime
- 1988-09-02 JP JP63507124A patent/JPH03500194A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO8902515A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1989002515A1 (en) | 1989-03-23 |
JPH03500194A (en) | 1991-01-17 |
DE8806388U1 (en) | 1989-01-12 |
DE3865019D1 (en) | 1991-10-24 |
US5052905A (en) | 1991-10-01 |
EP0377617B1 (en) | 1991-09-18 |
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Legal Events
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Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050902 |