EP0808421B1 - Verstellbare hydrostatische pumpe - Google Patents
Verstellbare hydrostatische pumpe Download PDFInfo
- Publication number
- EP0808421B1 EP0808421B1 EP96900534A EP96900534A EP0808421B1 EP 0808421 B1 EP0808421 B1 EP 0808421B1 EP 96900534 A EP96900534 A EP 96900534A EP 96900534 A EP96900534 A EP 96900534A EP 0808421 B1 EP0808421 B1 EP 0808421B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control
- pump
- rotor
- adjustable
- piston
- 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 - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/06—Control
- F04B1/07—Control by varying the relative eccentricity between two members, e.g. a cam and a drive shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
- F04B49/123—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element
- F04B49/128—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element by changing the eccentricity of the cylinders, e.g. by moving a cylinder block
Definitions
- the invention is based on an adjustable hydrostatic pump according to the genus of the main claim.
- a pump is in one Training as a radial piston pump known as Adjusting member a cam ring is provided, the Eccentricity as the decisive factor for the Pump adjustment or the pump swivel viewed becomes.
- the cam ring is here of two different sizes, hydraulic adjusting piston held in position, the larger adjusting piston being part of a hydromechanical adjustment device.
- the Noise development in such a piston pump is very much from the rigidity of the hydraulic clamping of the adjusting element, the cam ring, depending.
- the Noise development decreases with decreasing stiffness hydraulic clamping of the cam ring and is by the portions of the Engine forces caused.
- a radial piston machine is known from DE 37 00 573 A1 known in which an additional pressure chamber in the control pin via a throttled connection from the high pressure side is rechargeable.
- an additional pressure chamber in the control pin via a throttled connection from the high pressure side is rechargeable.
- JP-A 22 38 179 is an adjustable one hydrostatic pump in one design as an axial piston pump known, also with a noise reduction is sought.
- the pump has a first Adjustment device for adjusting the stroke of the pump second adjustment device for noise reduction is used and the actuating cylinder via a electrohydraulic control valve is controllable.
- This Pump builds with two adjustment devices and electrohydraulic control elements that depend on Angle of rotation of the pump can be controlled, relatively expensive.
- the adjustable hydrostatic pump according to the invention has the characteristic features of the main claim on the other hand the advantage that the noise of the Pump is significantly reduced by the influence of the acting on the hydraulic clamping of the adjusting element Share of engine power is reduced, this is counteracted.
- the control piston with an additional control device additional pressure signal from the angle of rotation of the pump is dependent on the engine Oscillations and thus the operating noise are favorable influenced. This influence or reduction goes far beyond a measure that is related to the constructive design of the adjusting member or the adjusting piston and the Adjustment device would be possible.
- the Additional control device for active noise reduction deal with purely hydromechanical functional elements realize, making a relatively simple, space-saving and inexpensive construction is possible.
- FIG. 1 shows a section through a clockwise rotating radial piston pump
- Figure 2 shows a longitudinal section by the radial piston pump according to FIG. 1
- FIG. 3 Diagram showing the Engine power in the direction of adjustment depending on Represents angle of rotation
- Figure 4 is part of a Cross-section according to IV-IV in Figure 2.
- FIG. 1 shows one in conjunction with FIG Radial piston pump 10, the housing 11 on one side is closed by a lid 12.
- the housing 11 In the housing 11 is a central, continuous longitudinal bore 13 is formed as well an adjoining cylindrical recess 14.
- a control pin 15 In the longitudinal bore 13 a control pin 15 is attached, which protrudes into the housing recess 14.
- a rotor 16 On this part of the control pin 15, a rotor 16 is slidably mounted in which a plurality of radially extending cylinder bores 17th are formed in which working pistons 18 slide.
- This Working pistons 18 are articulated with sliding shoes 19 connected with their shoe soles on the Support the inner surface 21 of a cylindrical cam ring 22, which is adjustably arranged in the housing recess 14 is. Due to the eccentric position of the as an adjusting element serving lifting ring 22, as can be seen in Figure 1, 18 strokes are given to the working pistons.
- the slide shoes 19 are tied to the lifting ring 22 Retaining rings 23, 24 are provided.
- control pin 15 In the control pin 15 are in the plane of the piston bores 17th two control slots 25, 26 formed, which also over formed in the control pin 15 longitudinal channels 27, 28 and Breakthroughs, of which only the top in Figure 2 Breakthrough 29 is shown with radial in the housing 11 running, outwardly penetrating channels are connected, which are designed here as suction channel 31 and pressure channel 32 are. On the control pin 15 are between the Control slots 25, 26 webs with 33, 34 denotes at which the dead center for the Rotary motion.
- the radial piston pump 10 is hydraulic Hubring adjustment trained that a pure Has hydromechanical adjustment device 35.
- Adjusting piston arranged on the outer circumference of the cam ring 22nd in two diametrically opposite positions act. The is in a manner known per se smaller actuating piston 36 via a channel 38 always from the High pressure side 32 acted upon.
- the larger control piston 37 delimits a pressure chamber 39 which is connected to the housing 11 flanged pressure regulator 41 from its regulating slide 42 shut off, connected to the high pressure side 32 or for Low pressure side 31 is relieved, as in itself Radial piston pumps with hydraulic cam ring adjustment is known.
- the rotor 16 designed here as a cylindrical star is over a universal joint coupling 43 from a drive shaft 44 driven, which in the cover 12 in a double ball bearing 45 is stored.
- the throttle bore 53 is outside the Angular range of the control grooves 55 through the inner wall 54 of the Cylinder star 16 completed. According to the im Cylinder star 16 are present, seven working pistons 18 thus a total of fourteen control grooves 55 in the inner wall 54 arranged.
- the mode of operation of the adjustable radial piston pump 10 is explained as follows, its basic function with the adjustment of the lifting ring 22 by the hydromechanical adjustment device 35 being assumed to be known per se.
- the stroke ring 22 is raised to the left via the adjusting device 35.
- the cam ring 22 is supported on the large actuating piston 37 due to the centering engine forces. Every time one of the working pistons 18 dips into or emerges from the high-pressure side at the control slot 26, the supporting force F s on the large actuating piston 37 experiences a jump in the amount of a piston force downward. This can be illustrated with the aid of FIG.
- a pressure change in the large actuating piston 37 is now brought about in synchronism with the force jumps by opening and closing control cross sections with the aid of the additional control device 47, this additional control device 47 being connected in parallel with the actual pressure regulator 41.
- the additional control device 47 is integrated with the help of the throttle bore 53 in the control pin 15 and the control grooves 55 in the rotor 16, because in this way the required relative movement and synchronization are already provided.
- the additional control device 47 when the working piston 18 "emerges from the high-pressure side 26, the additional control device 47 also opens a control cross section for the return and the pressure in the actuating cylinder 39 is reduced, in order to reduce the effect of the force jump 59
- the operation of the additional control device 47 is adapted to the hydraulic stroke adjustment in such a way that, despite the delays caused by the hydromechanical adjustment device, a temporal collision of the force jump from the engine and Counteraction on the actuating piston 37 is ensured.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
Claims (10)
- Verstellbare hydrostatische Pumpe, insbesondere Kolben- oder Flügelzellenpumpe, mit einem Gehäuse, in dem ein mit einer Antriebswelle zusammenwirkender Rotor angeordnet ist, der Ausnehmungen aufweist, in denen Pumpenelemente gleitend geführt sind, die sich mit ihren aus dem Rotor ragenden Enden an einem huberzeugenden Verstellorgan abstützen, auf das zum Verstellen mindestens ein einen Druckraum begrenzender Stellkolben einer hydraulischen Verstelleinrichtung einwirkt und mit einem Steuerkörper, in dem der Hochdruck- und Niederdruckseite zugeordnete, voneinander getrennte Steuerschlitze ausgebildet sind, dadurch gekennzeichnet, daß eine hydromechanische Zusatzsteuereinrichtung (47) vorgesehen ist, welche parallel zur Verstelleinrichtung (35) in dem dem Stellkolben (37) zugeordneten Druckraum (39) eine Druckänderung in entsprechend synchroner Weise zu den am Stellkolben (37) auftretenden Kraftsprüngen (58, 59) steuert.
- Verstellbare Pumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Zusatzsteuereinrichtung (47) von dem Rotor (16)und dem zugehörigen Steuerkörper (15) gebildet wird, die relativ zueinander beweglich sind.
- Verstellbare Pumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Zusatzsteuereinrichtung (47) in eine vom Druckraum (39) zum Rücklauf geführte Steuerverbindung (48) geschaltet ist.
- Verstellbare Pumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Zusatzsteuereinrichtung (47) im Rotor (16) angeordnete Steuernuten (55) aufweist, wobei jedem Pumpenelement (18) mindestens eine zum Rücklauf entlastete Steuernut (55) zugeordnet ist, welche Steuernuten (55) mit mindestens einer gehäusefesten Steuerausnehmung (53) im Steuerkörper (15) zusammenarbeiten, die mit dem Druckraum (39) Verbindung hat und daß Steuernuten (55) und Steuerausnehmung (53) in ihrer Winkellage in Drehrichtung gesehen so aufeinander abgestimmt sind, daß bei jedem Eintauchen und je dem Austauchen eines Pumpenelements (18) in die Hochdruckseite (26) ein Steuerquerschnitt(55, 53) in der Zusatzsteuereinrichtung (47) gesteuert wird.
- Verstellbare Pumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sie als Radialkolbenpumpe (10) mit einem Hubring (22) als Verstellorgan ausgebildet ist, bei der in radialen Bohrungen (17) des Rotors (16) jeweils Arbeitskolben (18) als Pumpenelemente angeordnet sind, die sich über Gleitschuhe (19) am Innenumfang des Hubrings (22) abstützen und bei welcher der Rotor (16) auf einem als Steuerkörper dienenden Steuerzapfen (15) gelagert ist, in dem die Steuerschlitze (25, 26) mit Verbindung zu einem Saugkanal (31) bzw. einem Druckkanal (32) liegen, und mit zwei auf einander diametral gegenüberliegenden Stellen am Außenumfang des Hubrings (22) einwirkenden Stellkolben (36, 37) unterschiedlicher Durchmesser, von denen der kleinere (36) stets von der Hochdruckseite (26) der Pumpe beaufschlagt ist und der größere (37) über eine hydromechanische Verstelleinrichtung (41) mit der Hochdruckseite (26) oder zur Niederdruckseite (25) verbindbar ist.
- Verstellbare Pumpe nach Anspruch 5, dadurch gekennzeichnet, daß die Steuernuten (55) der Zusatzsteuereinrichtung (47) in der Innenwand des Rotors (16) längs des Umfangs verteilt liegen und zu dessen einer Stirnseite hin offen sind und daß in der Mantelfläche des Steuerzapfens (15) als Steuerausnehmung wenigstens eine radiale Drosselbohrung (53) angeordnet ist, die über einen gehäusefesten Kanal (51, 49) mit dem Druckraum (39) am großen Stellkolben (37) Verbindung hat.
- Verstellbare Pumpe nach Anspruch 6, dadurch gekennzeichnet, daß ein Rotor (16) bei sieben Kolben (18) vierzehn zugeordnete Steuernuten (55) angeordnet sind.
- Verstellbare Pumpe nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß die Zusatzsteuereinrichtung (47) synchron mit den Kraftsprüngen einen Druckabbau im Druckraum (39) steuert.
- Verstellbare Pumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sie als Axialkolbenpumpe in Schrägscheibenbauart ausgebildet ist, bei welcher der Rotor als Zylindertrommel, das Verstellorgan als verstellbare Schrägscheibe und der Steuerkörper als Steuerscheibe ausgebildet sind, wobei in die Zylindertrommel und die Steuerscheibe die Zusatzsteuereinrichtung integriert ist.
- Verstellbare Pumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sie als Flügelzellenpumpe ausgebildet ist und die Zusatzsteuereinrichtung in einen Rotor und eine stirnseitige Steuerplatte integriert ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19504220A DE19504220A1 (de) | 1995-02-09 | 1995-02-09 | Verstellbare hydrostatische Pumpe |
DE19504220 | 1995-02-09 | ||
PCT/DE1996/000081 WO1996024766A1 (de) | 1995-02-09 | 1996-01-20 | Verstellbare hydrostatische pumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0808421A1 EP0808421A1 (de) | 1997-11-26 |
EP0808421B1 true EP0808421B1 (de) | 1999-05-19 |
Family
ID=7753516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96900534A Expired - Lifetime EP0808421B1 (de) | 1995-02-09 | 1996-01-20 | Verstellbare hydrostatische pumpe |
Country Status (7)
Country | Link |
---|---|
US (1) | US5980215A (de) |
EP (1) | EP0808421B1 (de) |
JP (1) | JPH10513525A (de) |
KR (1) | KR100382129B1 (de) |
CN (1) | CN1077958C (de) |
DE (2) | DE19504220A1 (de) |
WO (1) | WO1996024766A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110630461A (zh) * | 2019-09-24 | 2019-12-31 | 邵玉强 | 一种变量径向柱塞泵 |
DE102019110762A1 (de) * | 2019-04-25 | 2020-10-29 | Hoerbiger Automotive Komfortsysteme Gmbh | Schlitzgesteuerte Radialkolbenpumpe |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19818396C2 (de) * | 1998-04-24 | 2001-08-16 | Bosch Gmbh Robert | Radialkolbenpumpe mit asymmetrischen Gleitsteinen |
US6343250B1 (en) | 2000-05-19 | 2002-01-29 | Caterpillar Inc. | Method and apparatus for smoothing the output of a hydrostatic transmission near zero speed |
US6470992B2 (en) * | 2001-04-03 | 2002-10-29 | Visteon Global Technologies, Inc. | Auxiliary solenoid controlled variable displacement power steering pump |
US6817438B2 (en) * | 2001-04-03 | 2004-11-16 | Visteon Global Technologies, Inc. | Apparatus and a method for adjusting fluid movement in a variable displacement pump |
US6916158B2 (en) * | 2003-04-30 | 2005-07-12 | Actuant Corporation | Radial piston pump |
US8123492B2 (en) * | 2004-09-20 | 2012-02-28 | Magna Powertrain Inc. | Speed-related control mechanism for a pump and control method |
JP4795437B2 (ja) | 2005-10-06 | 2011-10-19 | ヨーマ−ポリテック ゲーエムベーハー | ベーンセルポンプ |
JP4834734B2 (ja) | 2005-10-06 | 2011-12-14 | ヨーマ−ポリテック ゲーエムベーハー | ベーンセルポンプ |
DE502006005306D1 (de) | 2005-10-06 | 2009-12-17 | Joma Polytec Kunststofftechnik | Flügelzellenpumpe |
DE102005048602B4 (de) * | 2005-10-06 | 2011-01-13 | Joma-Polytec Kunststofftechnik Gmbh | Flügelzellenmaschine, insbesondere Flügelzellenpumpe |
US7736134B2 (en) | 2006-10-10 | 2010-06-15 | Joma-Polytec Kunststofftechnik Gmbh | Vane machine, in particular vane pump |
DE102010034896B3 (de) * | 2010-08-16 | 2011-07-28 | Alke, Knut, 37520 | Hydraulikpumpe, Getriebe daraus und Fahrzeug mit dem Getriebe |
JP5620882B2 (ja) * | 2011-05-23 | 2014-11-05 | 日立オートモティブシステムズ株式会社 | 可変容量形ポンプ |
CN102606438A (zh) * | 2012-03-29 | 2012-07-25 | 北京市三一重机有限公司 | 一种水泵 |
CN104153958B (zh) * | 2014-07-07 | 2016-06-29 | 西安交通大学 | 一种径向柱塞泵的排量调节用交流伺服电机驱动装置 |
CN104196720B (zh) * | 2014-07-07 | 2016-04-13 | 西安交通大学 | 一种变量叶片泵排量调节用交流伺服电机驱动装置 |
CN106194637B (zh) * | 2016-07-27 | 2018-04-17 | 西安交通大学 | 一种伺服电机直接驱动变量的浮杯式径向柱塞泵 |
CN106224191B (zh) * | 2016-07-27 | 2018-04-17 | 西安交通大学 | 一种浮杯式滑靴结构的径向柱塞变量泵 |
CN106246488B (zh) * | 2016-07-27 | 2018-04-17 | 西安交通大学 | 一种双列柱塞的伺服电机驱动变量的浮杯式径向柱塞泵 |
CN108590995A (zh) * | 2018-04-11 | 2018-09-28 | 王长健 | 变量泵及液压系统 |
DE102019215830A1 (de) * | 2019-10-15 | 2021-04-15 | Robert Bosch Gmbh | Verdrängerpumpe und Verfahren zum Betreiben einer Verdrängerpumpe |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3086477A (en) * | 1960-05-09 | 1963-04-23 | New York Air Brake Co | Variable displacement pump |
DE2720306C2 (de) * | 1977-05-06 | 1986-02-27 | Robert Bosch Gmbh, 7000 Stuttgart | Verdrängermaschine |
JPS6131675A (ja) * | 1984-07-24 | 1986-02-14 | Nippon Denso Co Ltd | 可変容量ポンプ |
JPS6155386A (ja) * | 1984-08-24 | 1986-03-19 | Nissan Motor Co Ltd | 可変容量ポンプのライン圧制御システム |
US4711616A (en) * | 1984-12-13 | 1987-12-08 | Nippondenso Co., Ltd. | Control apparatus for a variable displacement pump |
DE3700573A1 (de) * | 1987-01-10 | 1988-07-21 | Bosch Gmbh Robert | Kolbenmaschine, insbesondere axial- oder radialkolbenmaschine |
JPH02238179A (ja) * | 1988-11-17 | 1990-09-20 | Daikin Ind Ltd | 可変容量形ポンプ |
DE4135904A1 (de) * | 1990-11-06 | 1992-05-21 | Teves Gmbh Alfred | Kolbenpumpe, insbesondere radialkolbenpumpe |
DK292690D0 (da) * | 1990-12-10 | 1990-12-10 | Htc As | Motor- eller pumpeaggregat |
DE9104126U1 (de) * | 1991-04-05 | 1992-08-06 | Robert Bosch Gmbh, 7000 Stuttgart | Radialkolbenpumpe |
DE4410419A1 (de) * | 1994-03-25 | 1995-09-28 | Bayer Ag | Verfahren zur Herstellung von Formteilen und Hohlkörpern aus Silicon-Kautschuk |
DE4410719A1 (de) * | 1994-03-28 | 1995-10-05 | Bosch Gmbh Robert | Elektrohydraulisch verstellbare Pumpe |
US5651301A (en) * | 1994-12-13 | 1997-07-29 | Unipat Aktiengessellschaft | Hydrostatic piston machines |
DE19513987C2 (de) * | 1995-04-13 | 1998-10-08 | Bosch Gmbh Robert | Verstellbare, hydrostatische Radialkolbenmaschine |
-
1995
- 1995-02-09 DE DE19504220A patent/DE19504220A1/de not_active Withdrawn
-
1996
- 1996-01-20 WO PCT/DE1996/000081 patent/WO1996024766A1/de active IP Right Grant
- 1996-01-20 JP JP8523880A patent/JPH10513525A/ja active Pending
- 1996-01-20 EP EP96900534A patent/EP0808421B1/de not_active Expired - Lifetime
- 1996-01-20 CN CN96191786A patent/CN1077958C/zh not_active Expired - Fee Related
- 1996-01-20 KR KR1019970705418A patent/KR100382129B1/ko not_active IP Right Cessation
- 1996-01-20 DE DE59601946T patent/DE59601946D1/de not_active Expired - Fee Related
- 1996-01-20 US US08/875,485 patent/US5980215A/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019110762A1 (de) * | 2019-04-25 | 2020-10-29 | Hoerbiger Automotive Komfortsysteme Gmbh | Schlitzgesteuerte Radialkolbenpumpe |
CN110630461A (zh) * | 2019-09-24 | 2019-12-31 | 邵玉强 | 一种变量径向柱塞泵 |
Also Published As
Publication number | Publication date |
---|---|
EP0808421A1 (de) | 1997-11-26 |
CN1077958C (zh) | 2002-01-16 |
WO1996024766A1 (de) | 1996-08-15 |
CN1173912A (zh) | 1998-02-18 |
JPH10513525A (ja) | 1998-12-22 |
DE19504220A1 (de) | 1996-08-14 |
US5980215A (en) | 1999-11-09 |
DE59601946D1 (de) | 1999-06-24 |
KR100382129B1 (ko) | 2003-08-21 |
KR19980702023A (ko) | 1998-07-15 |
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