EP1311762A1 - Innenzahnradpumpe - Google Patents
InnenzahnradpumpeInfo
- Publication number
- EP1311762A1 EP1311762A1 EP01960144A EP01960144A EP1311762A1 EP 1311762 A1 EP1311762 A1 EP 1311762A1 EP 01960144 A EP01960144 A EP 01960144A EP 01960144 A EP01960144 A EP 01960144A EP 1311762 A1 EP1311762 A1 EP 1311762A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing plate
- internal gear
- gear pump
- pump housing
- suction channel
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 48
- 239000000446 fuel Substances 0.000 claims abstract description 20
- 238000005086 pumping Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000036316 preload Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/10—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
- F04C14/14—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using rotating valves
-
- 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
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/70—Safety, emergency conditions or requirements
- F04C2270/701—Cold start
Definitions
- the invention relates to an internal gear pump for conveying fuel from a suction channel into a pressure channel, with a pump housing in which an internally toothed toothed ring and an externally toothed pinion driven by a drive shaft are mounted, the pinion being arranged eccentrically to the toothed ring and for producing a pumping effect cooperates with the toothed ring, the
- Pinion and the toothed ring rest with their one end on the pump housing and with their other end on a sealing plate.
- Such an internal gear pump is also called
- Called gerotor pump or gerotor pump The toothed ring and the pinion represent the pump elements and are also referred to as the outer rotor and inner rotor.
- DE 38 27 573 AI describes an internal gear pump, the gear ring of which is driven by an electric motor.
- the delivery chambers of the internal gear pump between the teeth of the two pump elements are covered in the axial direction by a thrust washer.
- the object of the invention is an internal gear pump . of the type described at the outset, which has zero axial play at the starting speed and whose delivery capacity decreases after the starting speed is exceeded.
- the internal gear pump according to the invention should be inexpensive to manufacture and have a long service life.
- the task is for an internal gear pump for conveying fuel from a suction channel into a pressure channel, with a pump housing in which an internally toothed toothed ring and an externally toothed pinion driven by a drive shaft are mounted, the pinion being arranged eccentrically to the toothed ring and for generating one Pumping action cooperates with the toothed ring, the pinion and the toothed ring bearing with one end face against the pump housing and with their other end face against a sealing plate, in that the suction channel is arranged in the sealing plate, and in that the sealing plate relative to the pump housing is movable that the distance between the suction channel and the pressure channel can be changed.
- a particular embodiment of the invention is characterized in that the suction duct is formed by an elongated recess in the circumferential direction of the sealing plate, and that the sealing plate relative to the pump housing between two 'positions is rotatable.
- the two positions of the sealing plate are made possible by stop surfaces which are formed on the sealing plate.
- Another special embodiment of the invention is characterized in that; that the sealing plate is biased in the axial direction by means of a spring which is coupled to the pump housing and to the sealing plate.
- the spring preload in the axial direction ensures that the sealing plate does not move in the axial direction until a certain pressure in the pump chamber is exceeded.
- Another particular embodiment of the invention is characterized in that the spring is biased in the circumferential direction against the drive direction of the internal gear pump.
- the spring preload in the circumferential direction ensures that the sealing plate only rotates when a certain speed of the pinion is exceeded.
- a further special embodiment of the invention is characterized in that the spring comprises two curved legs which are connected to one another at one end connected and coupled to the sealing plate, and which are coupled at the other end to the pump housing.
- the inventive design of the spring enables the spring to be pretensioned both in the axial direction and in the circumferential direction by simple means.
- a further special embodiment of the invention is characterized in that on the side of the sealing plate facing away from the toothed ring and the pinion, a pin is guided axially displaceably at a certain distance and cooperates with a further spring in order to counteract movement of the sealing plate in the axial direction ,
- the distance between the sealing plate and the pin is chosen so that the sealing plate comes into contact with an end face of the pin in full load operation. If the pressure in the pump chamber continues to rise, the sealing plate continues to move against the biasing force of the additional spring.
- the preload force of the additional spring, its spring rate and the displacement of the sealing plate in the axial direction up to a stop define the maximum operating pressure of the internal gear pump.
- a further special embodiment of the invention is characterized in that the suction channel is connected to a fuel inlet whose longitudinal axis coincides with the longitudinal axis of the drive shaft. This design has proven to be particularly advantageous in practice.
- a further special embodiment of the invention is characterized in that the fuel inlet opens into a sleeve in which the further spring is received and in which radial bores for the passage of fuel are made.
- the sleeve forms a stop that limits the axial movement of the sealing plate.
- a further special embodiment of the invention is characterized in that a bypass valve is accommodated in the pump housing, which is connected to the suction channel via an axial bore and to the pressure channel via a second axial bore.
- axially in the direction of the longitudinal axis of the drive shaft means the internal gear pump.
- the bypass valve allows, for example with the help of an additional manually operated pump, the fuel to be bypassed when the internal gear pump is not driven.
- Figure 1 shows an embodiment of an inventive
- FIG. 2 shows the view of a section along the line II -II in Figure 1;
- FIGS. 1 to 4 shows the view of a section along the line IV-IV in FIG.
- the internal gear pump shown in FIGS. 1 to 4 comprises a pump housing 1.
- a drive shaft 2 is rotatably mounted in the pump housing 1.
- the drive shaft 2 drives an internal gear or pinion 3, which is attached to the end of the drive shaft 2 with the aid of a tolerance ring 4.
- the internal gear 3 is in engagement with an external gear 5, which is also referred to as a toothed ring.
- the external gear 5 is surrounded by a bearing ring 6 which is fastened to the pump housing 1 with the aid of screws 7 and 8.
- the internal gear pump shown in FIGS. 1 to 4 comprises a pump housing 1.
- a drive shaft 2 is rotatably mounted in the pump housing 1.
- the drive shaft 2 drives an internal gear or pinion 3, which is attached to the end of the drive shaft 2 with the aid of a tolerance ring 4.
- the internal gear 3 is in engagement with an external gear 5, which is also referred to as a toothed
- Screw heads of screws 7 and 8 are designated 9 and 10.
- the drive shaft 2 is biased away from the internal gear 3 to the left by means of a plate spring 12, which is supported against a circlip 11 fastened in a groove in the drive shaft 2.
- the internal gear 3 is held in contact with the pump housing 1 by the biasing force of the plate spring 12.
- a sealing plate 13 rests on the other end face of the gear wheels 3 and 5.
- Sealing plate 13 is held in contact with the gears 3 and 5 by means of a spring 14.
- the spring 14 comprises two curved legs 15 and 16. Two bent ends of the curved legs 15 and 16 are received in a blind hole 27 of the sealing plate 13.
- connection bores 21 and 20 with a bypass valve 22 in connection When the spring-loaded check valve 22 is open, the two connecting bores 20 and 21 are connected to one another. When the bypass valve 22 is closed, the connection between the connection bores 20 and 21 is closed and the pressure channel 19 is connected to a pressure connection 23 via the connection bore 20.
- the suction channel recessed in the sealing plate 13 is connected to a suction chamber 24 which is surrounded by a housing cover 35.
- the housing cover 35 is placed on the pump housing 1.
- a central fuel inlet bore 36 is recessed in the housing cover 35.
- Sealing plate 13 In the position of the sealing plate 13 shown in FIG. 3, the stop surfaces 26 are in contact with the screw heads 9 and 10. An arrow 44 indicates that the sealing plate 13 rotates with increasing speed of the drive shaft 2 until the stop surfaces 25 rest on the screw heads 9 and 10.
- a pin 28 is arranged on the side of the sealing plate 13 facing away from the drive shaft 2. Between the sealing plate 13 and one A certain distance is provided on the end face of the pin 28. The pin 28 is acted upon by the prestressing force of a compression spring 29 which is received in a sleeve 30. In addition, the pin 28 is slidably guided in the sleeve 30 in the axial direction. The sleeve 30 is fastened coaxially to the fuel inlet bore 36 in the interior of the housing cover 35. Holes 31 and 32 are recessed in the lateral surface of the sleeve 30 in order to ensure the passage of fuel from the fuel inlet 36 into the suction space 24.
- the internal gear 3 of the pump is driven by the drive shaft 2 and the tolerance ring 4.
- the diaphragm spring 12 also holds the internal gear 3 against the axial face of the drive clutch in contact with the flat surface of the pump housing 1 against a possible axial force
- the bore 21 connects the bypass valve 22 to the suction chamber 24
- Internal gear pump and allowed, e.g. by means of a manually operated pump to call the fuel past the pump elements when the internal gear pump is not driven.
- the pump housing 1 supports the external gear 5 with the aid of the bearing ring 6.
- the sealing plate 13 is placed against the gear wheels 3 and 5 without play and is lightly pressed by means of the spring 14.
- the force of the spring 14 is designed for the start of the internal gear pump so that a sufficient Kra material pressure is guaranteed for filling the low pressure system.
- the second function of the spring 14 is to hold the sealing plate 13 in a position rotated counter to the direction of gear rotation during the starting process. This position guarantees the maximum flow rate Starting speed.
- the . Sealing plate 13 is thus pressed by the spring 14 against the gear rotation direction against the stop 26, designed as a screw head 10.
- the plate 13 has no contact with the bearing ring 6, which is achieved by a play of approximately 0.01 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10040692A DE10040692C1 (de) | 2000-08-19 | 2000-08-19 | Innenzahnradpumpe |
DE10040692 | 2000-08-19 | ||
PCT/DE2001/002965 WO2002016772A1 (de) | 2000-08-19 | 2001-08-03 | Innenzahnradpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1311762A1 true EP1311762A1 (de) | 2003-05-21 |
EP1311762B1 EP1311762B1 (de) | 2006-09-20 |
Family
ID=7653068
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01960144A Expired - Lifetime EP1311762B1 (de) | 2000-08-19 | 2001-08-03 | Innenzahnradpumpe |
Country Status (6)
Country | Link |
---|---|
US (1) | US6764283B2 (de) |
EP (1) | EP1311762B1 (de) |
JP (1) | JP2004507640A (de) |
CZ (1) | CZ299441B6 (de) |
DE (2) | DE10040692C1 (de) |
WO (1) | WO2002016772A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1209359A2 (de) * | 2000-11-23 | 2002-05-29 | Robert Bosch Gmbh | Zahnradförderpumpe |
US10337512B2 (en) | 2014-08-25 | 2019-07-02 | Carrier Corporation | Gear pump with dual pressure relief |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007120503A2 (en) * | 2006-03-31 | 2007-10-25 | Metaldyne Company, Llc | Variable displacement gerotor pump |
JP4842341B2 (ja) * | 2009-03-23 | 2011-12-21 | 日立オートモティブシステムズ株式会社 | ギヤポンプ及びブレーキ装置用ギヤポンプ |
DE102011075415A1 (de) * | 2011-05-06 | 2012-11-08 | Robert Bosch Gmbh | Zahnpumpe |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2405061A (en) * | 1942-12-02 | 1946-07-30 | Eaton Mfg Co | Pump structure |
US3026809A (en) * | 1956-04-06 | 1962-03-27 | Borg Warner | Internal-external gear pump |
US3515496A (en) * | 1968-05-06 | 1970-06-02 | Reliance Electric Co | Variable capacity positive displacement pump |
DE2650908A1 (de) * | 1976-11-06 | 1978-05-11 | Bosch Gmbh Robert | Innenzahnradmaschine (pumpe oder motor) |
US4492539A (en) * | 1981-04-02 | 1985-01-08 | Specht Victor J | Variable displacement gerotor pump |
DE3827573A1 (de) * | 1988-08-13 | 1990-02-15 | Bosch Gmbh Robert | Vorrichtung zum foerdern von kraftstoff aus einem vorratstank zur brennkraftmaschine, insbesondere eines kraftfahrzeuges |
DE4142799C1 (de) * | 1991-12-26 | 1993-04-15 | J.M. Voith Gmbh, 7920 Heidenheim, De | |
CA2219062C (en) * | 1996-12-04 | 2001-12-25 | Siegfried A. Eisenmann | Infinitely variable ring gear pump |
-
2000
- 2000-08-19 DE DE10040692A patent/DE10040692C1/de not_active Expired - Fee Related
-
2001
- 2001-08-03 WO PCT/DE2001/002965 patent/WO2002016772A1/de active IP Right Grant
- 2001-08-03 JP JP2002521835A patent/JP2004507640A/ja not_active Withdrawn
- 2001-08-03 EP EP01960144A patent/EP1311762B1/de not_active Expired - Lifetime
- 2001-08-03 US US10/110,902 patent/US6764283B2/en not_active Expired - Fee Related
- 2001-08-03 DE DE50111053T patent/DE50111053D1/de not_active Expired - Lifetime
- 2001-08-03 CZ CZ20021352A patent/CZ299441B6/cs not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0216772A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1209359A2 (de) * | 2000-11-23 | 2002-05-29 | Robert Bosch Gmbh | Zahnradförderpumpe |
EP1209359A3 (de) * | 2000-11-23 | 2003-07-23 | Robert Bosch Gmbh | Zahnradförderpumpe |
US10337512B2 (en) | 2014-08-25 | 2019-07-02 | Carrier Corporation | Gear pump with dual pressure relief |
Also Published As
Publication number | Publication date |
---|---|
CZ20021352A3 (cs) | 2002-10-16 |
US6764283B2 (en) | 2004-07-20 |
DE10040692C1 (de) | 2001-09-20 |
US20030026711A1 (en) | 2003-02-06 |
EP1311762B1 (de) | 2006-09-20 |
CZ299441B6 (cs) | 2008-07-30 |
DE50111053D1 (de) | 2006-11-02 |
WO2002016772A1 (de) | 2002-02-28 |
JP2004507640A (ja) | 2004-03-11 |
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Legal Events
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