EP0826110B1 - Dispositif hydraulique coulissant de regulation de puissance et de couple - Google Patents

Dispositif hydraulique coulissant de regulation de puissance et de couple Download PDF

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Publication number
EP0826110B1
EP0826110B1 EP96919743A EP96919743A EP0826110B1 EP 0826110 B1 EP0826110 B1 EP 0826110B1 EP 96919743 A EP96919743 A EP 96919743A EP 96919743 A EP96919743 A EP 96919743A EP 0826110 B1 EP0826110 B1 EP 0826110B1
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EP
European Patent Office
Prior art keywords
control
pressure
valve
pump
delivery
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
EP96919743A
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German (de)
English (en)
Other versions
EP0826110A1 (fr
Inventor
Mikko Erkkilae
Felix Zu Hohenlohe
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.)
Brueninghaus Hydromatik GmbH
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Brueninghaus Hydromatik GmbH
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Publication of EP0826110A1 publication Critical patent/EP0826110A1/fr
Application granted granted Critical
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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
    • F04B2201/00—Pump parameters
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1204—Position of a rotating inclined plate
    • 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
    • F04B2205/00—Fluid parameters
    • F04B2205/08—Pressure difference over a throttle

Definitions

  • the present invention relates to a power or torque control device for an adjustable hydraulic pump with a hydraulic servo actuator for stepless Setting the pump delivery rate at which the delivery rate setting in Dependence on the delivery pressure of the hydraulic pump in a delivery pressure line and a control pressure in a control line is determined, and the actuator one Pump actuator in the direction of the maximum flow rate and at least an acting on the pump actuator in the direction of a delivery rate reduction Has piston, the piston surface with a hydraulically operated control valve the delivery pressure can be acted upon or connected to a drain, and the The control valve is actuated by the control pressure in the control line, wherein a torque valve is provided, the closing force of which is a measuring spring arrangement is determined, which is connected to the pump actuator and depending on the Delivery rate setting is biased, and the torque valve Control line depending on the control pressure in the control line and the Preload of the measuring spring assembly connects to the drain.
  • Such a control device is known from EP 0 149 787.
  • the control device is either a torque control or a power control operable, depending on whether in the discharge pressure line of the hydraulic pump optionally adjustable flow throttle is provided or not.
  • the control devices have a direct functional relationship between the stroke volume the pump and the load-dependent operating pressure, of which the control valve Acting control pressure is dependent.
  • a measure of the displacement of the The hydraulic pump is the position that adjusts the pump delivery rate Pump actuator, which has a measuring spring arrangement with the torque valve connected is.
  • the shape of the hyperbolic torque or power curve is determined solely by the interpretation of the characteristic of the measuring spring arrangement.
  • This known power or torque control device is very strong depending on the load on the load side taken from the operating pressure line.
  • a change in the amount of labor also changes the amount of tax oil in the Control line so that the pump is adjusted along its performance hyperbola.
  • a Change in the location of the power hyperbole that is, a change in Power setting of the pump is only possible by directly adjusting the preload the measuring spring arrangement possible by means of a handle. This adjustment by hand is very cumbersome and expensive. In certain applications, for example in Excavator vehicles or the like, however, it is necessary to adjust the power the pump depending on the work or the speed of the pump to be able to change the driving diesel engine.
  • the object of the present invention is therefore to provide a performance or Torque control device according to the preamble of appended claim 1 create with which the torque or power setting of the hydraulic pump simple way changed and to changing working conditions respectively different loads can be adjusted.
  • the present invention makes it possible in particular to control the control pressure in the control line by adjusting the adjustable throttle device accordingly to be changed, even if the load side is removed from the operating pressure line Work flow rate should remain constant.
  • the power setting of the adjustable hydraulic pump quickly and easily to different Working conditions are adjusted.
  • the adjustable throttle device preferably consists of the electrically controlled proportional valve, through which the control pressure in the control line is continuously adjustable.
  • the adjustable throttle device preferably consists of the electrically controlled proportional valve, through which the control pressure in the control line is continuously adjustable.
  • the adjustable throttle device is made of one Switching valve and a throttle arranged parallel to this. In this case are the power and flow control even when the Switching valve effective.
  • the adjustable Throttle device that is, the switching valve and the throttle parallel to it, and the Branch to the control valve and the torque valve another throttle in the Control line can be arranged.
  • an adjustable flow restrictor in the delivery pressure line arranged between the hydraulic pump and the branch Control line arranged.
  • Pump speed fluctuations which affect the flow rate, over the control according to the invention is detected, which thus works as a power control.
  • the adjustable flow throttle is not provided in the delivery pressure line, so provides the control according to the invention represents a torque control.
  • the adjustable throttle device with a control device be connected via the different operating modes by means of a separate switch the hypropump are adjustable.
  • This configuration makes it possible to Power setting of the pump by operating, for example, one in the cab Excavators arranged separate switch to adapt to the respective work.
  • the control device can also have a device for measuring the Diesel speed must be connected, so that the power setting of the pump too can be controlled or adjusted depending on the diesel speed.
  • Figure 1 shows a hydraulic pump 1, which is via a shaft 2 by a not shown Drive is driven.
  • the hydraulic pump 1 can be, for example adjustable axial piston pump, which has a pump actuator 3, the Swivel angle is proportional to the stroke volume of the hydraulic pump 1.
  • a Servo actuator for adjusting the swivel angle of the hydraulic pump includes one Spring 4 and a pressurized piston 5, the spring 4, the hydraulic pump 1st to a maximum swivel angle, that is, to the maximum delivery volume.
  • the piston area of the Piston 6 is significantly larger than that of the piston 5.
  • a pressure relief valve 11 is in series with the control valve switched.
  • the control valve 8 is designed as a pressure compensator, so it can also be used as a Pressure valve are referred to and is the one hand from the delivery pressure of line 9, and on the other hand, acted upon by a control pressure of a control line 12.
  • Throttle device 13 adjustable, which is arranged in the control line 12.
  • the Control line 12 takes the load-dependent operating pressure of the hydraulic pump 1 from one Operating pressure line 15 behind an optionally adjustable flow restrictor 16 from.
  • Throttle device 13 can be changed in a simple manner.
  • the optionally adjustable flow restrictor 16 limits the flow rate of the Hydraulic pump 1 in the delivery pressure line 10. In the one shown in FIG Embodiment are the delivery pressure and the control pressure, which the control valve 8th act, removed in front of or behind the flow throttle 16. In this case it is therefore a power regulation.
  • the flow restrictor 16 is not available, you get a torque control.
  • the torque valve 17 is acted upon by the pressure of the control line 12 and on the other hand by a measuring spring arrangement 18, the pretensioning by the position the piston 6 or the pump actuator 3 is determined.
  • the torque valve 17 can connect the control line 12 to an unpressurized drain. Reaches the Control pressure in the control line 12 the value set on the torque valve 16, see above this begins to open to the drain, and there is a pressure drop at the spool of the control valve 8.
  • the control valve 8 is opened and the piston 6 is on the Signal pressure line 7 is acted upon by a signal pressure and moves this or that Pump actuator 3 in the direction of smaller flow rates.
  • the Measuring spring assembly 18 of the torque valve 17 biased so that the pump is adjusted along the performance hyperbole.
  • the adjustable one Throttle device 13 formed by a quantity proportional valve 13a, which for Example can be electrically controlled. In the closed position of the volume proportional valve 13a, the power and the flow control are switched off.
  • the adjustable throttle device 13 is through a switching valve 13b and a throttle 13c arranged in parallel therewith. If necessary, a further throttle 14 between the throttle device 13 and the branch to the control valve 8 and to the torque valve 17 of the control line 12 be provided. This further throttle 14 limits the amount of control oil in the Control line 12 when the switching valve 13b is in the open position.
  • FIG. 3 shows a schematic overview of a further exemplary embodiment of the present invention.
  • the adjustable throttle device of the power or Torque control device 22 of pump 1 has a control device 20 connected, which can be controlled by means of a separate switch 21.
  • Appropriate setting of the switch 21 can be different operating modes, that is Power settings of the pump can be adjusted.
  • the switch 21 shown is discreetly adjustable, but continuous adjustment is also possible. Dependent Different performance settings of the pump 1 can thus be made from work be made. It is particularly favorable that the switch 21 separately Example can be arranged in the cab of an excavator.
  • a Device 23 for measuring the speed of the pump 1 driving Diesel engine 25 to be connected to the control device 20. This makes it possible the performance of pump 1 depending on the speed of the diesel engine continuously or change discreetly.
  • Figure 4 shows a further embodiment of the present invention, in which the components corresponding to the first exemplary embodiment shown in FIG are identified by the same reference numerals.
  • Operating pressure lines 15a, 15b are provided, which from the delivery pressure line 10th branch off. With the two operating pressure lines 15a, 15b different loads can be operated, e.g. a charger block through the operating pressure line 15a and Excavator block through the operating pressure line 15b.
  • the number of operating pressure lines, which branch off from the discharge pressure line 10 is not limited to two, such as in the exemplary embodiment shown in FIG. 4, but the delivery pressure line 10 can branch into any number of operating pressure lines.
  • a control line 12a or 12b branches off from each operating pressure line 15a, 15b, in each of which an adjustable throttle device 13a is provided.
  • the shown adjustable throttling devices are electrically controlled volume proportional valves 13a according to the embodiment shown in Figure 1, however the adjustable throttle devices shown in FIG Embodiment also from a switching valve and one parallel to this arranged choke exist, as in the second embodiment ( Figure 2). are If more than two operating pressure lines are provided, each of these branches Operating pressure lines from a control line, in each of which an adjustable Throttle device is provided. As shown in Figure 4, the two are Control lines 12a, 12b optionally or alternately via a selection valve 30 the control line 12 connectable. The function and effect of the control line 12 was already in detail with reference to the first embodiment shown in Figure 1 described.
  • a choke 14 may be arranged in the control line 12.
  • This choke 14 is in the Figure 4, however, not shown.
  • an adjustable Flow throttle 16 can be arranged in the delivery pressure line 10, wherein downstream of this throttle 16, the control pressure and upstream of this throttle 16 the delivery pressure is tapped off, analogously to that shown in FIG. 1 Embodiment.
  • This optionally adjustable flow restriction 16 is in the Figure 4 not shown.
  • the adjustable throttle devices 13a, 13a of FIG. 4 The embodiment shown can be according to that shown in FIG Embodiment to be connected to a control device 20, via the 21 different operating modes by means of a separate switch Hydraulic pump 1 are adjustable. This embodiment is also not shown in FIG. 4.

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

Abstract

L'invention concerne un dispositif de régulation de puissance et de couple pour une pompe hydraulique (1) réglable, avec un servo-régulateur hydraulique pour ajuster en continu le débit de refoulement de la pompe. L'ajustement du débit de refoulement est déterminé en fonction de la pression de refoulement de la pompe hydraulique (1) régnant dans une conduite de pression de refoulement (10) et de la pression de commande régnant dans la conduite de commande (12). Le régulateur comporte un ressort (4) qui place un élément de régulation de la pompe (3) dans le sens de débit de refoulement maximal et au moins un piston (6) qui agit sur l'élément de régulation de la pompe (3) dans le sens d'une diminution du volume refoulé. La surface du piston peut être sollicitée par la pression de refoulement par l'intermédiaire d'une soupape de commande (8) à actionnement hydraulique ou est reliée à un écoulement (19). L'actionnement de la soupape de commande (8) s'effectue à l'aide de la pression de commande régnant dans la conduite de pression de commande (12). Il est prévu une soupape qui agit sur le couple (17) et dont la force de fermeture est déterminée par un système de ressort de mesure (18) relié à l'élément de régulation de la pompe (3) et précontraint en fonction de l'ajustement du débit de refoulement. Cette soupape qui agit sur le couple (17) relie la conduite de commande (12), en fonction de la pression de commande qui y règne et de la précontrainte du système de ressort de mesure (18), à l'écoulement (9). Dans la conduite de commande (12) dérivée de la conduite de pression de service (15) de la pompe, il est prévu un dispositif d'étranglement (13) ajustable servant à ajuster la pression de commande qui s'exerce sur la soupape de commande (8) et sur la soupape qui agit sur le couple (17) ou sur leurs éléments de fermeture.

Claims (7)

  1. Dispositif de régulation de puissance ou de couple pour une pompe hydraulique (1) réglable comportant un dispositif hydraulique d'asservissement pour le réglage en continu du débit de la pompe, dans lequel le réglage du débit est déterminé en fonction de la pression de refoulement de la pompe hydraulique (1) dans une conduite de pression de refoulement (2) et en fonction d'une pression de commande dans une conduite de commande (12), et dans lequel le dispositif de réglage comporte un ressort (4) réglant un organe de réglage de pompe (3) en direction du débit maximal et au moins un piston (6) qui agit sur l'organe de réglage (3) de la pompe dans le sens d'une réduction du débit, et dont la surface de piston peut être sollicitée par la pression de refoulement, par l'intermédiaire d'une soupape de commande (8) actionnée hydrauliquement, ou est reliée à une évacuation (19), et l'actionnement de la soupape de commande (8) s'effectue au moyen de la pression de commande dans la conduite de commande (12), et dans lequel il est prévu une soupape de couple (17) dont la force de fermeture est déterminée par un dispositif à ressort de mesure (18), qui est relié à l'organe de réglage (3) de la pompe est qui est précontraint en fonction du réglage du débit, et dans lequel la soupape de couple (17) relie la conduite de commande (12) à l'évacuation (19) en fonction de la pression de commande dans la conduite de commande (12) et en fonction de la précontrainte du dispositif à ressort de mesure (18), caractérisé en ce que dans la conduite de commande (12), partant de la conduite de pression de service (15) de la pompe, est disposé un dispositif d'étranglement (13) réglable, pour le réglage de la pression de commande agissant sur la soupape de commande (8) et sur la soupape de couple (17) ou leurs organes de fermeture.
  2. Dispositif de régulation de puissance ou de couple pour une pompe hydraulique (1) réglable comportant un dispositif hydraulique d'asservissement pour le réglage en continu du débit de la pompe, dans lequel le réglage du débit est déteminé en fonction de la pression de refoulement de la pompe hydraulique (1) dans une conduite de pression de refoulement (2) et en fonction d'une pression de commande dans une conduite de commande (12), et dans lequel le dispositif de réglage comporte un ressort (4) réglant un organe de réglage de pompe (3) en direction du débit maximal et au moins un piston (6) qui agit sur l'organe de réglage (3) de la pompe dans le sens d'une réduction du débit, et dont la surface de piston peut être sollicitée par la pression de refoulement, par l'intermédiaire d'une soupape de commande (8) actionnée hydrauliquement, ou est reliée à une évacuation (19), et l'actionnement de la soupape de commande (8) s'effectue au moyen de la pression de commande dans la conduite de commande (12), et dans lequel il est prévu une soupape de couple (17) dont la force de fermeture est déterminée par un dispositif à ressort de mesure (18), qui est relié à l'organe de réglage (3) de la pompe est qui est précontraint en fonction du réglage du débit, et dans lequel la soupape de couple (17) relie la conduite de commande (12) à l'évacuation (19) en fonction de la pression de commande dans la conduite de commande (12) et en fonction de la précontrainte du dispositif à ressort de mesure (18), caractérisé en ce que la conduite de pression de refoulement (10) se ramifie en au moins deux conduites de pression de service (15a, 15b), de chacune desquelles part une conduite de commande (12a, 12b), dans chacune desquelles est prévu un dispositif d'étranglement (13a) indirect, les conduites de commande (12a, 12b) pouvant être reliées au choix à la conduite de commande (12), par l'intermédiaire d'une soupape de sélection (30).
  3. Dispositif de régulation selon la revendication 1 ou 2, caractérisé en ce que le dispositif d'étranglement (13) réglable ou les dispositifs d'étranglement (13) réglables est constitué ou sont constitués d'une ou chacun d'une soupape à débit proportionnel (13a) commandée électriquement.
  4. Dispositif de régulation selon la revendication 1 ou 2, caractérisé en ce que le dispositif d'étranglement (13) réglable ou les dispositifs d'étranglement (13) réglables est constitué ou sont constitués d'une ou chacun d'une soupape de commutation (13b) et d'un organe d'étranglement (13c) disposé en parallèle sur celle-ci.
  5. Dispositif de régulation selon la revendication 4, caractérisé en ce qu'entre le dispositif d'étranglement (13) réglable ou la soupape de sélection (30) et la ramification vers la soupape de commande (8) et vers la soupape de couple (17), un organe d'étranglement (14) est disposé dans la conduite de commande (12).
  6. Dispositif de régulation selon l'une des revendications précédentes, caractérisé en ce qu'un organe d'étranglement de débit (16), éventuellement réglable, est disposé dans la conduite de pression de refoulement (10) et en ce que la pression de commande est prélevée sur cet organe d'étranglement (16) et en amont, la pression de refoulement.
  7. Dispositif de régulation selon l'une des revendications précédentes, caractérisé en ce que le dispositif d'étranglement (13) réglable ou les dispositis d'étranglement (13) réglables est relié ou sont reliés à un ou chacun à un dispositif de commande (20) par lequel différents modes de fonctionnement de la pompe hydraulique (1) peuvent être réglés au moyen d'un commutateur (21) séparé.
EP96919743A 1995-05-16 1996-05-09 Dispositif hydraulique coulissant de regulation de puissance et de couple Expired - Lifetime EP0826110B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19517974A DE19517974A1 (de) 1995-05-16 1995-05-16 Verschiebbare hydraulische Leistungs- bzw. Momentenregeleinrichtung
DE19517974 1995-05-16
PCT/EP1996/001970 WO1996036813A1 (fr) 1995-05-16 1996-05-09 Dispositif hydraulique coulissant de regulation de puissance et de couple

Publications (2)

Publication Number Publication Date
EP0826110A1 EP0826110A1 (fr) 1998-03-04
EP0826110B1 true EP0826110B1 (fr) 1999-01-27

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EP96919743A Expired - Lifetime EP0826110B1 (fr) 1995-05-16 1996-05-09 Dispositif hydraulique coulissant de regulation de puissance et de couple

Country Status (5)

Country Link
US (1) US5993168A (fr)
EP (1) EP0826110B1 (fr)
JP (1) JP4422212B2 (fr)
DE (2) DE19517974A1 (fr)
WO (1) WO1996036813A1 (fr)

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DE19953170B4 (de) * 1999-11-04 2004-08-12 Brueninghaus Hydromatik Gmbh Leistungsregelvorrichtung und Ventilblock für eine Leistungsregelvorrichtung
DE102013214861A1 (de) 2012-08-16 2014-05-22 Robert Bosch Gmbh Verstellvorrichtung für eine hydrostatische Pumpe und hydrostatische Pumpe

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US9086143B2 (en) 2010-11-23 2015-07-21 Caterpillar Inc. Hydraulic fan circuit having energy recovery
CN102536761B (zh) * 2011-12-26 2015-01-07 中联重科股份有限公司 工程机械及其非电控液压泵的功率控制系统及控制方法
US9323253B2 (en) * 2012-12-21 2016-04-26 Eaton Corporation Proportional flow control of a fluid pump assembly
CN110185093A (zh) * 2019-05-21 2019-08-30 上海威派格智慧水务股份有限公司 一种双罐体结构无负压供水装置
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19953170B4 (de) * 1999-11-04 2004-08-12 Brueninghaus Hydromatik Gmbh Leistungsregelvorrichtung und Ventilblock für eine Leistungsregelvorrichtung
DE102013214861A1 (de) 2012-08-16 2014-05-22 Robert Bosch Gmbh Verstellvorrichtung für eine hydrostatische Pumpe und hydrostatische Pumpe

Also Published As

Publication number Publication date
DE59601232D1 (de) 1999-03-11
JP4422212B2 (ja) 2010-02-24
US5993168A (en) 1999-11-30
DE19517974A1 (de) 1996-11-21
EP0826110A1 (fr) 1998-03-04
JPH11505308A (ja) 1999-05-18
WO1996036813A1 (fr) 1996-11-21

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