EP0164602B2 - Dispositif pour le réglage de la pression et du débit d'une pompe réglable - Google Patents

Dispositif pour le réglage de la pression et du débit d'une pompe réglable Download PDF

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Publication number
EP0164602B2
EP0164602B2 EP85105969A EP85105969A EP0164602B2 EP 0164602 B2 EP0164602 B2 EP 0164602B2 EP 85105969 A EP85105969 A EP 85105969A EP 85105969 A EP85105969 A EP 85105969A EP 0164602 B2 EP0164602 B2 EP 0164602B2
Authority
EP
European Patent Office
Prior art keywords
capacity
pressure
pump
regulating
control valve
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
EP85105969A
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German (de)
English (en)
Other versions
EP0164602B1 (fr
EP0164602A3 (en
EP0164602A2 (fr
Inventor
Volker Dipl.-Ing. Palm
Berthold Pfuhl
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6238344&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0164602(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to AT85105969T priority Critical patent/ATE46561T1/de
Publication of EP0164602A2 publication Critical patent/EP0164602A2/fr
Publication of EP0164602A3 publication Critical patent/EP0164602A3/de
Application granted granted Critical
Publication of EP0164602B1 publication Critical patent/EP0164602B1/fr
Publication of EP0164602B2 publication Critical patent/EP0164602B2/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
    • 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
    • F04B49/08—Regulating by delivery pressure
    • 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
    • F04B49/06—Control using electricity

Definitions

  • the invention is based on a device of the type (DE 31 19 095 C2) of claim 1.
  • an adapted controller is usually required for the regulation of the pressure and the delivery rate in connection with corresponding actual value sensors for each production phase.
  • the controllers used are each switched over or work as a limiter circuit with an automatic transition from speed to pressure control. If such a device or pump is used to control injection molding machines, the problem with a last-mentioned regulator arises that the pressure regulator runs within the control limits during the speed phase of the pressure cylinder and therefore an optimal transition from speed to pressure control is not possible.
  • an electrical control system which comprises a sensor coupled to the actuator of the pump, as well as a setpoint current generator for generating a setpoint current signal indicating the setpoint for the delivery flow of the pump , furthermore a device for combining the desired current signal and the position signal to form a resulting signal which indicates a desired position for the actuator, and a signal converter for converting the resulting signal into a pressure medium pressure signal which is proportional thereto and which is applied to the actuator.
  • the drawing shows a control device for an adjustable pump in a schematic representation.
  • 10 denotes an adjustable pump, which sucks in pressure medium from a container 12 via a suction line 11 and displaces it into a delivery line 13.
  • the delivery line 13 leads to a working cylinder 14; in it a directional valve 15 (control valve) with three switching positions with a continuous transition is arranged, for. B. an electromagnetically actuated proportional valve.
  • the actuator 16 determining the delivery rate of the pump 10 z. B. the swash plate of an axial piston pump - is set with the help of two opposing actuating pistons 17, 18 with areas of unequal size.
  • the actuating piston 18 is acted upon via a line 19 which starts from the delivery line 13, specifically from a point downstream of the directional control valve 15 lies.
  • the actuating piston 17 is acted upon by a control line 20, which is also connected to the delivery line 13, specifically at a point which lies between the pump 10 and the directional control valve 15.
  • the directional control valve 15 is set by an electromagnet 23, which is connected via an electrical line 24 to an electronic control unit 25, from which a first electrical line 26 leads to an electronic flow limiter 27 and a second electrical line 28 to a position transducer 29 of the directional control valve 15
  • the position sensor 29 continuously signals the position of the directional valve 15 to the electronic control unit 25; this in turn specifies, by means of a signal received from line 26, correspondingly processed values via line 24 to electromagnet 23, which adjusts directional valve 15 accordingly.
  • An electrical pressure transmitter 31 is connected to the delivery line 13 and leads an actual value reserve 33 via an electrical line 32 and the differentiated actual pressure value to a control amplifier 35 via a line 42.
  • An electrical line 34 branches off from the electrical line 32 and also leads to the control amplifier 35, to which the pressure setpoint P to be generated by the pump is input via an input 36.
  • the quantity limiter 27 has a 3 input 37, via which the delivery volume to be provided by the pump is input; it also limits their maximum Output. Furthermore, a tracking 39 is provided in the control device, which brings the control amplifier 35 into operative connection with the quantity limiter 27.
  • the individual units 33, 35, 27 and 39 contain various amplifiers, resistors and capacitors, the mode of operation of which has not been discussed in detail, since this does not contribute to a better understanding of the invention. Only one diode 40 in the actual value reserve 33 is mentioned Function is discussed below.
  • the working cylinder 14 is designed to be single-acting and in the exemplary embodiment represents the pressure cylinder of an injection molding machine.
  • the speed and pressure curve on the working cylinder 14 is important.
  • the speed curve refers to the feed movement of the piston.
  • the function of the directional control valve 15 is to adjust the delivery quantity or the delivery pressure of the pump in accordance with the above-mentioned setpoint specifications. As long as the quantity limiter 27 is not effective, the setpoint quantity M prevails unchanged.
  • the electronic control unit is controlled with this value and the directional control valve is positioned according to the setpoint.
  • control piston 18 is connected via the control line 19 to the delivery line 13 in front of the directional control valve, the force on this - because its area is larger - prevails so that the force on the piston 17 is overcome and the pump 10 is set to a larger delivery rate. A constant pressure difference and thus a quantity adjustment of the pump proportional to the setpoint is achieved via this control piston.
  • the pressure setpoint and actual value are compared at the control amplifier 35, and after appropriate amplification, this signal acts on the quantity limiter 27 and corrects the setpoint of the delivery quantity until the actual value determined on the pressure transmitter 31 corresponds to the pressure setpoint entered at the input 36

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Transmission Device (AREA)

Claims (3)

1. Installation de réglage de la pression et du débit d'une pompe réglable (10) dont l'organe de réglage (16) se règle par l'intermédiaire d'un piston (18) soumis à l'action d'une pression sur commande d'une soupape de commande (15) la soupape de commande établissant une différence de pression constante ainsi que d'une installation de commande électrique pour la régulation du débit et de la pression de la pompe, la valeur réelle de la pression étant déterminée par un capteur de pression raccordé à la conduite de transfert (13) de la pompe, caractérisée en ce que la valeur réelle de la pression (31) régnant dans la conduite de transfert (13) est introduite comme signal électrique avec une réserve de valeur réelle de pression (33) dans un amplificateur électrique de réglage (35) qui reçoit également la valeur de consigne de la pression (P), en ce que la valeur de consigne du débit (M) est introduite dans un limiteur de débit (27) qui règle la soupape de commande (15) par l'intermédiaire d'un moyen électronique de réglage de position (25), dont la position qui correspond au débit est introduite comme signal électrique (29) également dans le moyen électrique de réglage de position (25) et en ce que l'amplificateur de réglage (35) compare la valeur de consigne et la valeur réelle de la pression en tenant compte de la réserve de valeur réelle de pression pour transmettre le signal de comparaison au limiteur de débit (27) et de le corriger jusqu'à ce que celui-ci réalise la valeur de consigne de la pression par un réglage correspondant du débit et en ce que la grandeur de réglage de l'amplificateur de réglage (35) ne peut dépasser une valeur inférieure à celle de la valeur de consigne du débit par un asservissement (39) prévu entre cet amplificateur et le limiteur de débit (27).
2. Installation selon la revendication 1, caractérisée par une réserve de valeur réelle (33) réglée par un amortissement directionnel formé par une diode (40) et une résistance (41).
3. Installation selon l'une des revendications 1 ou 2, caractérisée en ce que la position de la soupape de commande (15) et ainsi la valeur réelle du débit se déterminent par un capteur de course (29) relié à la soupape de commande.
EP85105969A 1984-06-14 1985-05-15 Dispositif pour le réglage de la pression et du débit d'une pompe réglable Expired - Lifetime EP0164602B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85105969T ATE46561T1 (de) 1984-06-14 1985-05-15 Einrichtung zum regeln des druckes und der foerdermenge einer verstellbaren pumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843422089 DE3422089A1 (de) 1984-06-14 1984-06-14 Einrichtung zum regeln des druckes und der foerdermenge einer verstellbaren pumpe
DE3422089 1984-06-14

Publications (4)

Publication Number Publication Date
EP0164602A2 EP0164602A2 (fr) 1985-12-18
EP0164602A3 EP0164602A3 (en) 1987-12-16
EP0164602B1 EP0164602B1 (fr) 1989-09-20
EP0164602B2 true EP0164602B2 (fr) 1994-12-28

Family

ID=6238344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85105969A Expired - Lifetime EP0164602B2 (fr) 1984-06-14 1985-05-15 Dispositif pour le réglage de la pression et du débit d'une pompe réglable

Country Status (5)

Country Link
US (1) US4708596A (fr)
EP (1) EP0164602B2 (fr)
JP (1) JP2654770B2 (fr)
AT (1) ATE46561T1 (fr)
DE (2) DE3422089A1 (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4801247A (en) * 1985-09-02 1989-01-31 Yuken Kogyo Kabushiki Kaisha Variable displacement piston pump
DE3644736C2 (de) * 1985-12-30 1996-01-11 Rexroth Mannesmann Gmbh Steueranordnung für mindestens zwei von mindestens einer Pumpe gespeiste hydraulische Verbraucher
DE3619147C2 (de) * 1986-06-06 1995-04-20 Bosch Gmbh Robert Verfahren zur Kompensation von Verlusten einer verstellbaren Pumpe
DE3644745A1 (de) * 1986-12-30 1988-07-14 Rexroth Mannesmann Gmbh Steueranordnung fuer mindestens zwei von mindestens einer pumpe gespeiste hydraulische verbraucher
DE3702002A1 (de) * 1987-01-23 1988-08-04 Hydromatik Gmbh Steuervorrichtung fuer ein hydrostatisches getriebe fuer wenigstens zwei verbraucher
US4886422A (en) * 1987-07-09 1989-12-12 Tokyo Keiki Company Ltd. Control apparatus of variable delivery pump
DE3733396C2 (de) * 1987-10-02 1998-12-17 Rexroth Mannesmann Gmbh Elektrische Pumpenregelung für die Förderstrom- und Druckregelung an einem Verbraucher
JP2620961B2 (ja) * 1988-09-26 1997-06-18 本田技研工業株式会社 可変容量式圧縮機のストローク検出値補正装置
DE8906826U1 (de) * 1989-06-03 1989-09-07 Keicher, Siegfried, 7906 Blaustein Hydraulische Regeleinrichtung zur Regelung einer Regelpumpe für den Antrieb eines Hydraulikmotors
US5177965A (en) * 1989-12-29 1993-01-12 Heinrich Nikolaus Pump control system with limit signal generated at a given displacement setting
DE3943357A1 (de) * 1989-12-29 1991-07-04 Rexroth Mannesmann Gmbh Schaltungsanordnung mit einer ansteuerelektronik fuer die magnetspulen von stellgliedern eines hydraulichen systems
US5287699A (en) * 1990-01-16 1994-02-22 Kabushiki Kaisha Komatsu Seisakusho Automatic vibration method and device for hydraulic drilling machine
DE4102087A1 (de) * 1991-01-24 1992-07-30 Rexroth Mannesmann Gmbh Schaltungsanordnung zur druckregelung in einem hydraulischen drucksystem
DE4140423A1 (de) * 1991-12-07 1993-06-09 Mannesmann Rexroth Gmbh, 8770 Lohr, De Vorrichtung zur einstellung des arbeitsfluessigkeitsdruckes
US5500580A (en) * 1994-09-19 1996-03-19 Hr Textron Inc. Integrated compliance servovalve
KR100212645B1 (ko) * 1994-09-30 1999-08-02 토니헬샴 유압펌프의 토출유량 제어장치
DE10104851A1 (de) * 2001-02-03 2002-08-22 Zf Lenksysteme Gmbh Pumpsystem mit einer hydraulischen Pumpe, insbesondere für ein Lenksystem
JP3085306U (ja) * 2001-10-11 2002-04-26 株式会社サルバニーニジャパン 曲げ加工装置
CN1283511C (zh) 2001-11-23 2006-11-08 Zf操作系统有限公司 用于汽车的液压助力转向系及用于这种转向系的调整方法
DE10157527A1 (de) * 2001-11-23 2003-06-05 Zf Lenksysteme Gmbh Hydraulische Hilfskraftlenkung für Kraftfahrzeuge
DE10157548A1 (de) * 2001-11-23 2003-06-05 Zf Lenksysteme Gmbh Einstellverfahren für hydraulisch arbeitende Fahrzeug-Servolenkungen
RU2716647C2 (ru) * 2015-03-10 2020-03-13 Сондерхофф Энджиниэринг Гмбх Способ компенсации потерь из-за утечек и транспортирующая система для перемещения определенного объема жидкости

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Publication number Priority date Publication date Assignee Title
US3777492A (en) * 1971-02-17 1973-12-11 Dowty Technical Dev Ltd Hydraulic apparatus including variable delivery pumps
DE2505780C2 (de) * 1975-02-12 1986-03-06 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum Regeln wenigstens einer verstellbaren Pumpe
US3996744A (en) * 1975-09-02 1976-12-14 The Cessna Aircraft Company Automatic control for hydraulic power transmission
DE2840687A1 (de) * 1978-09-19 1980-04-03 Bosch Gmbh Robert Einrichtung zur regelung des foerderstroms und zur begrenzung des foerderdrucks einer verstellbaren pumpe.
DE2904474A1 (de) * 1979-02-07 1980-08-28 Bosch Gmbh Robert Stromregeleinrichtung fuer eine verstellbare pumpe
US4285639A (en) * 1979-06-12 1981-08-25 Parker-Hannifin Corporation Electronic control for variable displacement pumps
DE3001680A1 (de) * 1980-01-18 1981-07-23 Robert Bosch Gmbh, 7000 Stuttgart Stromregeleinrichtung fuer eine pumpe
DE3016609A1 (de) * 1980-04-30 1981-11-05 G.L. Rexroth Gmbh, 8770 Lohr Vorrichtung zum regeln der foerdermenge einer pumpe
DE3027819A1 (de) * 1980-07-23 1982-02-25 Backe, Wolfgang, Prof.Dr.-Ing., 5100 Aachen Vorrichtung zur regelung einer verstellpumpe
DE3044515A1 (de) * 1980-11-26 1982-06-03 bso Steuerungstechnik GmbH, 6603 Sulzbach Verstelleinrichtung fuer hydraulikpumpe mit verstellbarer foerdermenge
DE3143074A1 (de) * 1981-10-30 1983-05-11 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur druck- und stromregelung einer verstellbaren pumpe

Also Published As

Publication number Publication date
US4708596A (en) 1987-11-24
EP0164602B1 (fr) 1989-09-20
JPS614881A (ja) 1986-01-10
EP0164602A3 (en) 1987-12-16
DE3422089A1 (de) 1985-12-19
EP0164602A2 (fr) 1985-12-18
ATE46561T1 (de) 1989-10-15
DE3573150D1 (en) 1989-10-26
JP2654770B2 (ja) 1997-09-17

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