EP0766788B1 - Moteur a pistons radiaux hydrostatique reglable - Google Patents

Moteur a pistons radiaux hydrostatique reglable Download PDF

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Publication number
EP0766788B1
EP0766788B1 EP96902897A EP96902897A EP0766788B1 EP 0766788 B1 EP0766788 B1 EP 0766788B1 EP 96902897 A EP96902897 A EP 96902897A EP 96902897 A EP96902897 A EP 96902897A EP 0766788 B1 EP0766788 B1 EP 0766788B1
Authority
EP
European Patent Office
Prior art keywords
lifting ring
radial
piston machine
measuring device
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
Application number
EP96902897A
Other languages
German (de)
English (en)
Other versions
EP0766788A1 (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 EP0766788A1 publication Critical patent/EP0766788A1/fr
Application granted granted Critical
Publication of EP0766788B1 publication Critical patent/EP0766788B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • 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
    • F04B2201/1213—Eccentricity of an outer annular cam

Definitions

  • the invention is based on a hydrostatic Radial piston machine with adjustable cam ring according to the Preamble of claim 1.
  • Such a machine is generally known. She will be in a wide range of hydraulic applications uses the effort because it is possible through their use to reduce control and / or regulating valves. Main advantages in drives with such Radial piston machines is besides the simplicity of construction their low loss, as well as the quick and precise electrical controllability of the machine.
  • pressurized adjusting piston used on the outer circumference of the cam ring along its direction of adjustment act.
  • the eccentricity of the cam ring which is proportional to the delivery rate of the machine, can be as Use controlled variable and is controlled by an inductive Position transducer recorded. This actual value is from one electronic control amplifier with a lead value compared and is used to control the position of the cam ring.
  • this inductive displacement sensor is no different than in Extension of the adjusting piston can be arranged, whereby the machine in its largest dimension enlarged. Since the displacement sensor is an additional attachment represents also increases the construction cost of the machine.
  • DE 35 13 736 A1 is a hydrostatic Radial piston pump with a measuring device for detecting the Eccentricity of a rotatable eccentric ring known.
  • a hydraulic linkage transmits the from deflection dependent on the eccentricity of the eccentric ring a tappet, which is located on the inside of the Eccentric rings supported on a slave tappet.
  • This is provided with a coil core, which corresponds to the existing eccentricity at the eccentric ring different immersed deep in a measuring coil and there a measuring signal triggers.
  • This measuring device has a variety of mechanical components and requires a lot of effort for hydraulic coupling; the signal must be picked up done in a rotating machine shaft.
  • the electrohydraulically adjustable according to the invention Machine with the characteristic features of the main claim has the advantage that the used means from inexpensive measuring equipment consist of the existing machine components are integrated or that existing components of the machine can be used as a transmitter. This enlarges neither construction volume nor construction effort of the machine.
  • a digital measurement signal is present, which by an electronic circuit both for Determination of the eccentricity of the cam ring as well Determining the speed of the rotor and, if necessary, for others Functions such as for noise reduction of the machine, can be used.
  • sampling time corresponds to the Requirements of the application, within certain limits is flexible by the number of transducers used sliding shoes can be varied. The smallest Sampling times can therefore be achieved if all Sliding shoes can be used as sensors. Is cheap also that the measuring device works without contact and therefore neither friction nor wear is subject to what is noticeable in a long service life with little maintenance makes.
  • Fig.2 is a diagram with the Course of the signal generated in the sensor in Dependence of the time or the angle of rotation of the rotor.
  • FIG. 1 shows a radial piston machine 10 whose housing 11 is closed by a cover, not shown.
  • the Housing 11 is a sealed to the outside substantially cylindrical recess 12 formed in the centrally a control pin 13 mounted in a stationary manner in the housing protrudes.
  • These working pistons 16 are articulated with Sliding shoes 17 connected from the holes 15 of the Protrude rotor and the by means not shown Retaining rings movable on a cylindrical cam ring 18 are tied up. The inside of the cam ring forms the Tread for these sliding shoes 17.
  • the cam ring is from two hydraulic adjustment pistons arranged in the housing 22 and 23, which are diametrically opposed and one Form adjustment device, fixed in position.
  • the Position of the cam ring 18 is within the recess, along the predetermined by the adjusting pistons 22 and 23 Direction variable. Attached parallel to the direction of adjustment Flattenings on the outer circumference of the cam ring 24 and Housing 25 serve as a guide in the displacement of Hubrings in the direction of adjustment and secure it at the same time against twisting.
  • In the control pin 13 are in the amount of 1 not recognizable control slots formed in the rotor, which also attached in the control pin 13 Longitudinal channels 26 and openings with radial in the housing running, outwardly penetrating channels are connected.
  • These channels 26 represent suction and pressure channels and lead the hydraulic medium into the machine 10 and under Pressure out again.
  • the angular position of the rotor 14 on the Control pin 13 is designed so that between the Control slots in the control pin 13 webs located in one Range are in which the working piston 16 in their Dead spots.
  • the rotor 14 is also one Coupling, not shown, from a bearing mounted in the cover Drive shaft rotated.
  • the radial piston machine 10 assigns Detection of the eccentricity 20 of the adjusting element serving lifting ring 18, a measuring device on the a transducer 27 in the cam ring 18 and over several Transmitter.
  • The serve as sensors Sliding shoes 17 of the working piston 16.
  • the one of them in Triggered signal is one Evaluation electronics 28 fed.
  • the time delay 36 between those in the signal curve successive, rising and falling Tension edges is a direct measure of that between the associated slide shoes existing distance, which how previously mentioned, proportional to the eccentricity of the Hubrings 18 is.
  • the waveform 30 or 31 is now in the form of a Processing electronics 28 processed that a falling Edge 35 in the waveform a counter with high frequency Counting sequence starts. This counter is stopped by a rising edge 32, the counting frequency being unique is to vote that the counting result of the present Eccentricity corresponds to 20.
  • the eccentricity 20 of the Hubrings 18 can thus be continuously over the entire Determine the adjustment range of the cam ring 18.
  • the Evaluation electronics 28 For the speed detection of the rotor 14 is the Evaluation electronics 28 the time 42 between two rising Detected voltage edges 32 which are inversely proportional to Machine speed is. About both measurands, speed and Eccentricity, the volume flow of the machine can be to capture.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Hydraulic Motors (AREA)

Claims (6)

  1. Machine hydrostatique à pistons radiaux (10), réglable, comprenant un carter (11) dans lequel un rotor (14) est monté à rotation autour d'un téton de commande (13), ce rotor coopérant avec un arbre moteur et guidant des pistons (16) logés dans des perçages radiaux (15), dont les extrémités dépassant les perçages (15) sont munies de patins (17) reliés de manière articulée aux pistons (16), les patins s'appuyant par leur côté intérieur contre un anneau de circulation (18) réglable de façon excentrée par rapport au rotor (14) à l'aide d'une installation ayant au moins un vérin de réglage (22) agissant sur la périphérie extérieure de l'anneau de circulation (18) le long de son installation de réglage ainsi que des moyens pour détecter l'excentricité de l'anneau de déplacement,
    caractérisée en ce que
    les moyens comprennent une installation de mesure et un circuit électronique d'exploitation (28) coopérant avec cette installation de mesure pour déduire l'excentricité (20) de l'anneau de circulation à partir de l'intervalle entre deux patins de glissement (17) successifs.
  2. Machine à pistons radiaux (10), selon la revendication 1,
    caractérisée en ce que
    l'installation de mesure comporte un capteur de valeurs de mesure (27) logé dans l'anneau de circulation (18), et venant notamment contre le côté intérieur de l'anneau de circulation (18).
  3. Machine à pistons radiaux (10) selon l'une quelconque des revendications 1 ou 2,
    caractérisée en ce que
    l'installation de mesure comporte comme générateurs de valeurs de mesure, au moins deux patins (17) placés l'un derrière l'autre dans le sens de rotation.
  4. Machine à pistons radiaux (10) selon l'une ou plusieurs des revendications 1, 2, 3,
    caractérisée en ce que
    le capteur de valeurs de mesure est prévu dans une zone de l'anneau de circulation (18) dans laquelle la distance entre deux patins (17) qui passent prend une valeur extrême, c'est-à-dire qu'elle est essentiellement coaxiale à la direction prédéfinie par les vérins de réglage (22, 23).
  5. Machine à pistons radiaux (10) selon l'une des revendications 1 à 4,
    caractérisée en ce que
    l'installation de mesure fonctionne selon un principe d'action sans contact.
  6. Machine à pistons radiaux (10) selon l'une ou plusieurs des revendications 1 à 5,
    caractérisée en ce que
    l'anneau de circulation (18) est monté de manière bloquée en rotation dans le carter (11) et des surfaces de glissement (24, 25) sont réalisées sur l'anneau de circulation (18) et le carter (11), ces surfaces étant essentiellement parallèles à la direction de réglage.
EP96902897A 1995-04-13 1996-02-24 Moteur a pistons radiaux hydrostatique reglable Expired - Lifetime EP0766788B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19513987A DE19513987C2 (de) 1995-04-13 1995-04-13 Verstellbare, hydrostatische Radialkolbenmaschine
DE19513987 1995-04-13
PCT/DE1996/000313 WO1996032589A1 (fr) 1995-04-13 1996-02-24 Moteur a pistons radiaux hydrostatique reglable

Publications (2)

Publication Number Publication Date
EP0766788A1 EP0766788A1 (fr) 1997-04-09
EP0766788B1 true EP0766788B1 (fr) 2001-01-10

Family

ID=7759614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96902897A Expired - Lifetime EP0766788B1 (fr) 1995-04-13 1996-02-24 Moteur a pistons radiaux hydrostatique reglable

Country Status (7)

Country Link
US (1) US5752427A (fr)
EP (1) EP0766788B1 (fr)
JP (1) JP3921240B2 (fr)
KR (1) KR100383156B1 (fr)
CN (1) CN1079910C (fr)
DE (2) DE19513987C2 (fr)
WO (1) WO1996032589A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0813653A1 (fr) * 1995-01-05 1997-12-29 Linear Anstalt Pompe permettant de refouler un milieu
DE19504220A1 (de) * 1995-02-09 1996-08-14 Bosch Gmbh Robert Verstellbare hydrostatische Pumpe
JP2921788B2 (ja) * 1996-10-16 1999-07-19 廣瀬バルブ工業株式会社 回転型液圧トランス
US5865087A (en) * 1996-10-18 1999-02-02 Olson; Howard A. Rotary variable displacement fluid power device
WO1999017021A1 (fr) * 1997-09-29 1999-04-08 S.A.I. Societa' Apparecchiature Idrauliche S.P.A. Machine hydraulique a pistons radiaux et a cylindree variable
DE10104851A1 (de) * 2001-02-03 2002-08-22 Zf Lenksysteme Gmbh Pumpsystem mit einer hydraulischen Pumpe, insbesondere für ein Lenksystem
US6916158B2 (en) 2003-04-30 2005-07-12 Actuant Corporation Radial piston pump
US7484939B2 (en) * 2004-12-17 2009-02-03 Eaton Corporation Variable displacement radial piston pump
FR2929347A1 (fr) 2008-03-26 2009-10-02 Bia Soc Par Actions Simplifiee Convertisseur d'energie mecanique en energie hydraulique et robot mettant en oeuvre le convertisseur
DE102009054876A1 (de) * 2009-12-17 2011-06-22 ZF Friedrichshafen AG, 88046 Verfahren zur Bestimmung des Schluckvolumens einer Radialkolbenmaschine
US8907539B2 (en) * 2011-08-26 2014-12-09 General Electric Company Retaining ring configuration system
DE102014108945A1 (de) * 2014-06-26 2015-12-31 Robert Bosch Automotive Steering Gmbh Hydraulische Verstellpumpe, insbesondere für ein Lenksystem eines Kraftfahrzeuges
US10030961B2 (en) 2015-11-27 2018-07-24 General Electric Company Gap measuring device
CN109958595B (zh) * 2019-04-04 2024-04-05 山西平阳重工机械有限责任公司 手动调节式轴配流径向柱塞泵
CN110630461B (zh) * 2019-09-24 2021-02-05 浙江瑞程石化技术有限公司 一种变量径向柱塞泵
CN110617214B (zh) * 2019-10-03 2021-02-19 浙江青霄科技股份有限公司 一种双芯并联泵的泵液输送方法
DE102022128195A1 (de) 2022-10-25 2024-04-25 Voith Patent Gmbh Hydraulische Radialkolbenmaschine

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
DE2454732A1 (de) * 1973-06-22 1976-05-20 Bosch Gmbh Robert Regeleinrichtung fuer hydropumpen
DE3048789A1 (de) * 1980-12-23 1982-07-15 Robert Bosch Gmbh, 7000 Stuttgart Hydrostatische verdraengermaschine
DE3413913A1 (de) * 1984-04-13 1985-10-24 J.M. Voith Gmbh, 7920 Heidenheim Verstelleinrichtung fuer das verdraengungsvolumen einer verdraengermaschine
DE3420519A1 (de) * 1984-06-01 1985-12-05 Robert Bosch Gmbh, 7000 Stuttgart Hydrostatischer antrieb
JPS6131675A (ja) * 1984-07-24 1986-02-14 Nippon Denso Co Ltd 可変容量ポンプ
DE3429542A1 (de) * 1984-08-10 1986-02-20 Robert Bosch Gmbh, 7000 Stuttgart Verstellbare hydrostatische pumpe
US4711616A (en) * 1984-12-13 1987-12-08 Nippondenso Co., Ltd. Control apparatus for a variable displacement pump
DE3513736A1 (de) * 1985-04-17 1986-10-30 G. Düsterloh GmbH, 4322 Sprockhövel Hydrostatische radialkolbenmaschine
DE9104126U1 (de) * 1991-04-05 1992-08-06 Robert Bosch Gmbh, 7000 Stuttgart Radialkolbenpumpe
DE4143152C2 (de) * 1991-12-28 2001-08-23 Bosch Gmbh Robert Radialkolbenmaschine
DE4302610C2 (de) * 1993-01-30 1996-08-08 Daimler Benz Ag Verfahren zum Regeln der Pumpleistung von Schmiermittelpumpen und Schmiermittelpumpe hierfür

Also Published As

Publication number Publication date
US5752427A (en) 1998-05-19
DE19513987C2 (de) 1998-10-08
WO1996032589A1 (fr) 1996-10-17
DE19513987A1 (de) 1996-10-17
DE59606298D1 (de) 2001-02-15
CN1079910C (zh) 2002-02-27
JPH10501601A (ja) 1998-02-10
EP0766788A1 (fr) 1997-04-09
JP3921240B2 (ja) 2007-05-30
CN1145658A (zh) 1997-03-19
KR100383156B1 (ko) 2003-08-27

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