EP0955465A2 - Pompe à piston axiale avec système intégral de mesure de déplacement angulaire - Google Patents

Pompe à piston axiale avec système intégral de mesure de déplacement angulaire Download PDF

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Publication number
EP0955465A2
EP0955465A2 EP99104637A EP99104637A EP0955465A2 EP 0955465 A2 EP0955465 A2 EP 0955465A2 EP 99104637 A EP99104637 A EP 99104637A EP 99104637 A EP99104637 A EP 99104637A EP 0955465 A2 EP0955465 A2 EP 0955465A2
Authority
EP
European Patent Office
Prior art keywords
housing
rotor
axial piston
pivotable
representing
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.)
Withdrawn
Application number
EP99104637A
Other languages
German (de)
English (en)
Other versions
EP0955465A3 (fr
Inventor
Volkmar Leutner
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0955465A2 publication Critical patent/EP0955465A2/fr
Publication of EP0955465A3 publication Critical patent/EP0955465A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • F04B49/002—Hydraulic systems to change the pump delivery
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1205—Position of a non-rotating inclined plate
    • F04B2201/12051—Angular position

Definitions

  • the invention is based on an adjustable hydrostatic axial piston machine with at least one rotor, which is arranged in a housing and carries several cylinders and at least one disc arranged obliquely to the rotor, on which the pistons movable in the cylinders are supported.
  • Electrohydraulically adjustable motors and pumps are increasingly being used in modern hydraulic drives.
  • the adjusting element responsible for the change in volume flow for example a swash plate in the swash plate machine or the rotor in the swash axis machine, is adjusted via hydraulic adjusting cylinder drives.
  • the respective adjusting cylinder is part of a closed control loop.
  • the actual value signal required for the control loop is detected by a sensor element which measures the position and the change in position of the adjusting element.
  • the swivel angle of the swashplate is usually accomplished by tapping the rotary movement in the virtual swivel point of the swashplate.
  • the measurement is problematic and complex because the axis of rotation of the swash plate on the housing cannot be determined exactly.
  • the pivoting movement must be sealed off from the housing via a shaft be brought out.
  • a backlash-free or backlash-free coupling of the sensor to the lead-out shaft is required.
  • a non-contact working measuring system comprising at least one sensor element and at least one element representing the measuring path is arranged between the housing and the disc or the pivoting rotor for adjusting the volume flow.
  • the element representing the measuring path or the sensor element is arranged on the swashplate, while in the case of the machine with the swiveling rotor - the swashplate machine - the element representing the measuring path or the sensor element on one of the other Rotor adjoining control disc is arranged.
  • the swivel angle of the adjusting element i.e. the swash plate or the swiveling cylinder drum
  • the adjustment angle is not measured in the area of the geometric adjustment axis, but in the area of the swivel joint directly between the swash plate or the cylinder drum and the housing.
  • the swivel joint can also represent the swivel bearing surface.
  • an optoelectronic position detector is arranged in the housing part of the weighing bearing in the spatial area of the bearing joint.
  • an elongated, thin-walled, light-sensitive semiconductor component in the housing.
  • a miniature light source is glued into the swash plate opposite the semiconductor module.
  • a light point emanating from the light source migrates on the semiconductor component.
  • Electronics downstream of the semiconductor module determine the location of the light point in relation to the two ends of the semiconductor module in real time. If necessary, the swivel angle can be calculated from the distance between this location and a defined zero position of the swivel path and the radius of the weighing bearing.
  • Such and similar non-contact displacement measuring systems do not require any installation space outside the pump housing, since they can generally be fully integrated in the housing wall. Because of the small size of the sensors, the space required inside the housing is negligibly small.
  • the position measuring systems are generally insensitive to shocks and measure the pivoting movement over a relatively large diameter, so that the adjustment control can be designed very sensitively without complex electronics. Since usually no moving mechanical components are led out of the housing, there are no sealing and adjustment problems.
  • the axial piston pump shown in FIG. 1 is a positive displacement pump with several pump pistons (30).
  • the pump pistons (30) are arranged in a rotating, externally driven cylinder drum (25) in cylinder bores (26).
  • the cylinder bores (26) are aligned parallel to the drive axis of rotation of the cylinder drum (25). They are at a constant distance from each other and from the drive axis of rotation.
  • the cylinder drum (25) sits on a drive shaft (20) which is mounted in a cross-divided housing (10, 11).
  • the fixed bearing consisting of a deep groove ball bearing (14) is seated in the cover (11) of the pump housing (10).
  • the drive shaft (20) is guided in a needle bearing (15) representing a floating bearing.
  • the cylinder drum (25) sits on the drive shaft (20) to a small extent via a spline toothing. It is arranged with the help of a between it and the drive shaft (20) Coil spring (21) pressed against a slot control plate (17) resting on the housing base.
  • the rotary drive movement is converted into a pump piston stroke movement with the aid of a swash plate (33) which is rigid with respect to the rotary drive movement.
  • the latter is pivotally mounted in the housing cover (11).
  • the swivel axis of the swash plate (33) cuts the drive shaft (20) vertically.
  • the support in the housing cover (11) has the form of a slide-mounted cradle bearing.
  • two cylindrical disk segments (34) are formed on the rear of the swash plate (33), which rest in the housing cover (11) on two plain bearing shells (35) fixed there.
  • the swash plate (33) is equipped at its upper edge with a lever (36) on which a hydraulically actuated adjusting piston (37) of a hydraulic adjusting drive acts against a return spring (38).
  • a pressure regulator (39) arranged outside the housing (10) determines the stroke of the adjusting piston (37) and thus the swivel position of the swash plate (33).
  • the pump pistons (30) rotating about the anti-drive axis are supported on the swash plate (33) with roller or sliding bearings.
  • sliding blocks (31) sit between the swash plate (33) and the pump pistons (30).
  • the sliding blocks (31) are held on the swash plate (33) at least on the suction side by a retaining plate (32).
  • the pump pistons (30) which are guided past the cylinder disc segment (34) shown in the foreground move out of the cylinder drum (25).
  • the Pump pistons (30) pass through the suction side. They suck in the pressure medium to be pumped via the slot control plate (17) and the suction channel (12) connected to it.
  • the pressure medium is compressed on the side of the swash plate (33) to the left of the drive shaft (20).
  • the pump pistons (30) are pushed into the cylinder drum (25) via the sliding blocks (31) in order to convey the pressure medium into the pressure channel (not shown) opposite the suction channel (12).
  • the swivel angle of the swash plate (33) is measured.
  • an incremental position measuring system is arranged, for example, in the area of the plain bearing shell (35) lying on the less loaded suction side.
  • the measuring system operating in the incident light method has, for example, a grating support (40) arranged or embedded in the cylindrical disk segment (34). The latter wears e.g. a grating (41), a reference mark (42) and a direction mark.
  • the reference mark (42) is arranged, for example, in the middle of the total swivel range of the swash plate (33).
  • the cavity in the slide bearing shell (35) located in the area of the grating support (40) is hydraulically connected to the housing interior via a bore or a channel. Consequently, no pressure or lubricant - falsifying the measurement result - can accumulate in the cavity in front of the grating support (40).
  • the optical scanning device (44) of the position measuring system (40-44) is integrated in the housing cover (11). She prefers to sit at the center of the total swivel range of the swash plate (33). For example, it is glued in the housing cover (11) so that it is medium-tight.
  • the displacement measuring system (40-44) in combination with the slide bearing shell (35) including the corresponding housing seal can be designed as a separately integrable assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP99104637A 1998-05-05 1999-03-09 Pompe à piston axiale avec système intégral de mesure de déplacement angulaire Withdrawn EP0955465A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19819960 1998-05-05
DE1998119960 DE19819960B4 (de) 1998-05-05 1998-05-05 Axialkolbenmaschine mit integriertem Schwenkwegmeßsystem

Publications (2)

Publication Number Publication Date
EP0955465A2 true EP0955465A2 (fr) 1999-11-10
EP0955465A3 EP0955465A3 (fr) 2000-08-16

Family

ID=7866681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99104637A Withdrawn EP0955465A3 (fr) 1998-05-05 1999-03-09 Pompe à piston axiale avec système intégral de mesure de déplacement angulaire

Country Status (3)

Country Link
EP (1) EP0955465A3 (fr)
JP (1) JPH11336656A (fr)
DE (1) DE19819960B4 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1251270A2 (fr) * 2001-04-19 2002-10-23 Brueninghaus Hydromatik Gmbh Pompe à pistons axiaux à capacité variable avec détecteur d'inclination
EP1251271A2 (fr) * 2001-04-19 2002-10-23 Brueninghaus Hydromatik Gmbh Pompe à pistons axiaux à capacité variable avec détecteur d'inclination
EP1462647A2 (fr) * 2003-03-25 2004-09-29 Sauer Bibus GmbH Machine à pression de fluide à cylindre rotatif
DE102004015618A1 (de) * 2004-03-30 2005-10-20 Zexel Valeo Compressor Europe Hubraumvariabler Verdichter sowie Verfahren zur Regelung des Kolbenhubs in einem solchen
WO2007017251A1 (fr) 2005-08-09 2007-02-15 Brueninghaus Hydromatik Gmbh Dispositif de regulation pour machine a piston hydrostatique pourvu d'une unite de commande electronique
WO2010121686A1 (fr) * 2009-04-21 2010-10-28 Robert Bosch Gmbh Dispositif pour l'enregistrement d'une cylindrée réglée
CN103573572A (zh) * 2012-07-28 2014-02-12 罗伯特·博世有限公司 以斜盘方式构造的流体静力的轴向活塞机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012221922A1 (de) * 2012-11-29 2014-06-05 Hawe Inline Hydraulik Gmbh Pumpe, insbesondere Axialkolbenpumpe mit Abtastfläche an der Schrägscheibe
DE102018218548A1 (de) 2018-10-30 2020-04-30 Robert Bosch Gmbh Hydrostatische Kolbenmaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3208250A1 (de) * 1982-03-08 1983-09-15 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum steuern und/oder regeln einer axialkolbenmaschine
US4655689A (en) * 1985-09-20 1987-04-07 General Signal Corporation Electronic control system for a variable displacement pump
DE3626619A1 (de) * 1986-08-06 1988-02-18 Hydromatik Gmbh Hydropumpe oder -motor verstellbaren verdraengungsvolumens
US5135031A (en) * 1989-09-25 1992-08-04 Vickers, Incorporated Power transmission
DE4022301C1 (fr) * 1990-07-13 1991-10-24 Brueninghaus Hydraulik Gmbh, 7240 Horb, De
US5141402A (en) * 1991-01-29 1992-08-25 Vickers, Incorporated Power transmission
US5554007A (en) * 1994-10-17 1996-09-10 Caterpillar Inc. Variable displacement axial piston hydraulic unit
DE19538835C1 (de) * 1995-10-18 1997-03-13 Brueninghaus Hydromatik Gmbh Axialkolbenmaschine mit Querverstellung und Drehverstellung der Schwenkwiege

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1251270A2 (fr) * 2001-04-19 2002-10-23 Brueninghaus Hydromatik Gmbh Pompe à pistons axiaux à capacité variable avec détecteur d'inclination
EP1251271A2 (fr) * 2001-04-19 2002-10-23 Brueninghaus Hydromatik Gmbh Pompe à pistons axiaux à capacité variable avec détecteur d'inclination
EP1251270A3 (fr) * 2001-04-19 2004-01-07 Brueninghaus Hydromatik Gmbh Pompe à pistons axiaux à capacité variable avec détecteur d'inclination
EP1251271A3 (fr) * 2001-04-19 2004-03-24 Brueninghaus Hydromatik Gmbh Pompe à pistons axiaux à capacité variable avec détecteur d'inclination
EP1462647A3 (fr) * 2003-03-25 2005-07-20 Sauer Bibus GmbH Machine à pression de fluide à cylindre rotatif
DE10313426B3 (de) * 2003-03-25 2004-11-11 Sauer Bibus Gmbh Verstellpumpeneinheit
EP1462647A2 (fr) * 2003-03-25 2004-09-29 Sauer Bibus GmbH Machine à pression de fluide à cylindre rotatif
DE102004015618A1 (de) * 2004-03-30 2005-10-20 Zexel Valeo Compressor Europe Hubraumvariabler Verdichter sowie Verfahren zur Regelung des Kolbenhubs in einem solchen
WO2007017251A1 (fr) 2005-08-09 2007-02-15 Brueninghaus Hydromatik Gmbh Dispositif de regulation pour machine a piston hydrostatique pourvu d'une unite de commande electronique
US7975599B2 (en) 2005-08-09 2011-07-12 Brueninghaus Hydromatik Gmbh Regulating device for a hydrostatic piston engine with electronic control unit
WO2010121686A1 (fr) * 2009-04-21 2010-10-28 Robert Bosch Gmbh Dispositif pour l'enregistrement d'une cylindrée réglée
CN102405350A (zh) * 2009-04-21 2012-04-04 罗伯特·博世有限公司 用于探测调整的活塞排量的装置
CN102405350B (zh) * 2009-04-21 2014-10-15 罗伯特·博世有限公司 用于探测调整的活塞排量的装置
CN103573572A (zh) * 2012-07-28 2014-02-12 罗伯特·博世有限公司 以斜盘方式构造的流体静力的轴向活塞机

Also Published As

Publication number Publication date
EP0955465A3 (fr) 2000-08-16
DE19819960A1 (de) 1999-11-18
JPH11336656A (ja) 1999-12-07
DE19819960B4 (de) 2005-03-03

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