EP1180598A2 - Ensemble soupape - Google Patents

Ensemble soupape Download PDF

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Publication number
EP1180598A2
EP1180598A2 EP01119038A EP01119038A EP1180598A2 EP 1180598 A2 EP1180598 A2 EP 1180598A2 EP 01119038 A EP01119038 A EP 01119038A EP 01119038 A EP01119038 A EP 01119038A EP 1180598 A2 EP1180598 A2 EP 1180598A2
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
valve arrangement
connection
consumer
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.)
Granted
Application number
EP01119038A
Other languages
German (de)
English (en)
Other versions
EP1180598A3 (fr
EP1180598B1 (fr
Inventor
Jörg Dantlgraber
Reiner Püschel
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.)
Bosch Rexroth AG
Original Assignee
Bosch Rexroth AG
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 Bosch Rexroth AG filed Critical Bosch Rexroth AG
Publication of EP1180598A2 publication Critical patent/EP1180598A2/fr
Publication of EP1180598A3 publication Critical patent/EP1180598A3/fr
Application granted granted Critical
Publication of EP1180598B1 publication Critical patent/EP1180598B1/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
    • F04B49/002—Hydraulic systems to change the pump delivery

Definitions

  • the invention relates to a valve arrangement for Supply of a hydraulic consumer according to the Preamble of claim 1.
  • Such a valve arrangement is, for example, from known from DE 42 11 551 C2 and DE 43 34 167 A1 and is used in hydraulic systems where a Consumer via a variable pump with a pressure medium is supplied. It is between the variable pump and the Consumers provided a bias valve, which at a for adjusting the delivery volume of the variable pump required minimum pressure connecting the consumer opens. This ensures that between the Pressure connection of the variable displacement pump and the preload valve for actuating an actuator of the variable pump required minimum pressure prevails. This minimum pressure is throttled over the backflow valve, so that too consumer pressures below this pressure are adjustable.
  • the preload valve is included a bluff body executed by a bias spring is biased against a valve seat.
  • the feather applied force corresponds to the minimum pressure for Adjustment of the variable pump.
  • the bluff body is with one Valve seat executed against the via the bias spring Valve body of a pressure relief valve is biased. Since the effective area of the valve body is less than that of the bluff body opens the valve body against the Force of the preload spring only when a maximum is reached Consumer pressure at which the pressure relief valve a connection to a tank is opened.
  • the Spring rate of the preload spring and the area ratio of the The valve body and the bluff body are dependent the maximum consumer pressure to be set and the Minimum pressure selected.
  • the invention is based on the object to create a valve assembly that an adjustment of maximum consumer pressure to different Operating conditions with minimal device technology Effort.
  • the valve arrangement is included Pressure relief valve and a preload valve, whose bluff body as a valve body via a bias spring and via a pilot valve arrangement in the closing direction is acted upon.
  • the pilot valve arrangement is such designed to change the closing direction effective control pressure allows so that according to maximum adjustable consumer pressure is variable. Since the Bluff body according to the invention additionally from a control pressure is biased in the closing direction, the bias spring weaker than in the prior art described at the beginning be interpreted.
  • the spring chamber assigned to the bluff body via a nozzle connected to the pressure connection, the control pressure in Spring chamber through a parallel to the pilot valve arrangement switched damming valve can be limited that for adjustment the minimum pressure required to adjust the variable pump is effective.
  • the bluff body with a first control edge are executed, over which one the Throttle cross-section enabling connection to the damming valve can be controlled with increasing consumer pressure, so that at Reaching the maximum consumer pressure of the Bluff body acting in the closed position control pressure is specified only by the pilot valve arrangement, while in the area below the control pressure by the Jam valve and the flow control valve is specified.
  • a tank connection is controllable, so that Pressure medium directly to the tank with minimal pressure losses can flow off. That is, in the valve arrangement according to the invention is the comparatively large bluff body also part of the pressure relief valve, through which the pressure medium flow controlled when the maximum pressure is reached becomes.
  • the pilot valve arrangement is used only for Setting the pilot pressure effective in the closing direction, so this with a small cross section can be interpreted.
  • the effective one for setting the minimum pressure Damming valve is preferably used as a check valve trained, the closing spring together with the Bluff body pretensioning spring in the closing direction determines the minimum pressure.
  • the pilot valve arrangement can, for example, as electrically adjustable pressure relief valve or by a variety of connected in parallel Pressure relief valves can be designed, optionally can be activated via a directional valve.
  • the embodiment is the bluff body with the second Control edge forming jacket breakthrough carried out when the maximum consumer pressure is reached Connection to the tank is controllable.
  • the nozzle is advantageously in the bottom of the cup-shaped bluff body.
  • FIG. 1 shows a simplified circuit diagram of a Valve arrangement 1, via which a hydraulic consumer 2, for example with an aggregate of an injection molding machine a variable displacement pump 4 can be connected.
  • a hydraulic consumer 2 for example with an aggregate of an injection molding machine a variable displacement pump 4 can be connected.
  • About the Valve arrangement 1 can be the maximum consumer pressure limited and one for actuating the actuators 6
  • Variable pump 4 required minimum pressure set become.
  • the variable displacement pump 4 can be used, for example, as Piston pump, preferably an axial piston pump or a radial piston pump be carried out, the actuator 6 by an actuating cylinder with an associated control valve is formed.
  • the valve arrangement 1 has a Input port P to which the pressure port of the Variable pump 4 is connected. Consumer 2 is on a consumer port A connected while a tank 8 is connected to a tank connection T.
  • a pilot operated pressure relief valve 16 provided in Closing direction by means of a pilot valve arrangement 18 specified pilot pressure is applied.
  • valve 12 and Pressure relief valve 16 shown separately -
  • the biasing spring 14 also the Valve body of the pressure relief valve 16 in Preloaded closing direction.
  • the pilot valve assembly 18 can a control line 20 in which there is a nozzle from the pressure line 10 tapped consumer pressure individually depending on the operating conditions limit.
  • the pilot valve arrangement has three in parallel as Pressure relief valves designed pilot valves 22, 23, 24, the one pilot valve 22 directly into the Control line 20 is switched during the two remaining pilot valves 23, 24 a preferably electrically adjustable directional valve 26 is connected upstream, either one of the two pilot valves 23, 24 is switchable.
  • the pilot valve 22 In the basic position of the Directional control valve 26, the pilot valve 22 is effective, via the the maximum effective consumer pressure to a maximum pressure is limited. Limit the two pilot valves 23, 24 the maximum consumer pressure to lower pressures than the pilot valve 22, so that by switching the Directional control valve 26 and by connecting the Pilot valve 23 or 24 changed accordingly Maximum consumer pressures are adjustable.
  • an electrically adjustable pressure relief valve 28 can be used as a pilot valve.
  • the output connector of the Pilot valve arrangement 18 is connected to the tank connection T connected.
  • FIG 2 shows a very simplified Sectional view through a valve assembly 1, with the the circuit shown in Figure 1 is realized.
  • the valve assembly 1 has a valve housing 30, in whose valve bore 32 a bluff body 34 is guided. This is against the valve seat via the biasing spring 14 36 biased so that the pressure port P against the Work port A is blocked.
  • the bluff body 34 is a cup-shaped piston executed, in the bottom of which the nozzle 38 is arranged, through which the interior 40 of the piston with a spring chamber 42 of the valve arrangement 1 can be connected. That is, the print on Pressure port P is in the closed position of the bluff body 34 via the interior 40 and the nozzle 38 into the spring chamber 42 transferred so that the bluff body 34 in addition to the force of Preload spring 14 by the control pressure in the spring chamber 42 in Is closed.
  • a bias connection 44 opens is connected to the tank 8 via a tank line 46.
  • tank line 46 In the tank line 46 is a check valve which acts as a damming valve 48 provided, the closing spring 50 in Dependency on the adjustment pump 4 minimum pressure to be set is selected.
  • the leader connector 44 forms a throttle cross section 52, which during the axial movement of the bluff body 34 whose bottom peripheral edge 54 can be opened or closed is.
  • Pressure relief port 56 which is downstream of the Check valve 48 is connected to the tank line 46.
  • This pressure relief port 56 can be when lifting the Bluff body 34 from the valve seat 36 by another Control edge 58 are controlled by a Breakthrough 60 is formed in the jacket of the bluff body 34.
  • FIG 2 shows the valve arrangement in its Basic position in which the pressure at work port A less than that for the adjustment of the variable pump 4 required minimum pressure is. It is assumed that Pressure relief valve 28 is set to 192 bar and the force of the bias spring 14 a pressure of 8 bar and the force of the closing spring 50 a pressure of 10 bar equivalent. Accordingly, the check valve 48 opens a pressure of 10 bar in the spring chamber 42, so that the Back of the bluff body 34 with a force in the closing direction is pressurized to a pressure of 18 bar (Closing spring 14 8 bar, check valve 48 10 bar) equivalent. When this minimum pressure is reached in Pressure port P becomes the bluff body 34 as shown in Figure 2 lifted from its valve seat 36 and the Connection to consumer connection A opened.
  • valve arrangement is in a storage function. It flows in Control oil flow, the size of which depends on the cross section of the nozzle 38 and the pressure difference (from 8 bar) above the nozzle is determined, via the nozzle 18 and the check valve 48 to the tank.
  • the valve arrangement has one in such Operating state practically no function.
  • electrical adjustable pressure relief valve 28 instead of electrical adjustable pressure relief valve 28 also a Parallel connection of fixed settings Pressure relief valves or a similar valve arrangement be used.
  • a valve arrangement for supplying a is disclosed hydraulic consumer with a pressure medium, wherein via a preload valve to adjust one Variable pump required minimum pressure is adjustable.
  • the maximum consumer pressure is about one Pressure relief valve limited, the Pressure relief valve assigned a pilot valve arrangement is over which the in the closing direction of a bluff body of the Pressure control valve effective control pressure changeable is.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)
EP20010119038 2000-08-17 2001-08-07 Ensemble soupape Expired - Lifetime EP1180598B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10040737 2000-08-17
DE10040737A DE10040737A1 (de) 2000-08-17 2000-08-17 Ventilanordnung

Publications (3)

Publication Number Publication Date
EP1180598A2 true EP1180598A2 (fr) 2002-02-20
EP1180598A3 EP1180598A3 (fr) 2003-04-16
EP1180598B1 EP1180598B1 (fr) 2006-11-08

Family

ID=7653094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010119038 Expired - Lifetime EP1180598B1 (fr) 2000-08-17 2001-08-07 Ensemble soupape

Country Status (2)

Country Link
EP (1) EP1180598B1 (fr)
DE (2) DE10040737A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008031390A1 (fr) * 2006-09-14 2008-03-20 Luk Lamellen Und Kupplungsbau Beteiligungs Kg système hydraulique d'amenée d'un fluide hydraulique à un consommateur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016122392A1 (de) * 2016-11-21 2018-05-24 Schwing Gmbh Dickstoffpumpe mit einstellbarer Begrenzung des Förderdrucks

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2120125A1 (de) * 1971-04-24 1972-11-16 Robert Bosch Gmbh, 7000 Stuttgart Hydraulikanlage
GB1443799A (en) * 1972-10-11 1976-07-28 Kloeckner Humboldt Deutz Ag Valve assembly
DE4211551A1 (de) * 1992-04-06 1993-10-07 Rexroth Mannesmann Gmbh Verstellpumpe mit einem Druckbegrenzungs- und einem Druckzuschaltventil
DE4334167A1 (de) * 1993-10-07 1995-04-13 Rexroth Mannesmann Gmbh Hydraulisches System zur Beaufschlagung eines hydraulischen Verbrauchers mit einem geregelten Verbraucherdruck und Drosselventil, insbesondere zur Verwendung in einem solchen hydraulischen System

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL169628C (nl) * 1971-06-29 1982-08-02 Ind En Handelmaatschappij Kopp Regelinrichting voor het lastonafhankelijk besturen van hydraulische aandrijfapparaten.
DE3603988C2 (de) * 1984-11-28 1994-12-08 Zahnradfabrik Friedrichshafen Steuereinrichtung für zwei über je einen Stromzweig durch eine Hochdruckpumpe versorgte hydraulische Stellvorrichtungen
DE4335495A1 (de) * 1992-10-27 1994-04-28 Bosch Gmbh Robert Steuereinrichtung für eine Hydraulikanlage
JPH10131751A (ja) * 1996-10-29 1998-05-19 Aisin Seiki Co Ltd タンデムポンプ装置
DE19729693A1 (de) * 1997-07-11 1999-01-14 Claas Industrietechnik Gmbh Hydraulische Steuerung für schaltbare Verbindungselemente, insbesondere für eine fremdgeschaltete Kupplung an einem Antriebsmotor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2120125A1 (de) * 1971-04-24 1972-11-16 Robert Bosch Gmbh, 7000 Stuttgart Hydraulikanlage
GB1443799A (en) * 1972-10-11 1976-07-28 Kloeckner Humboldt Deutz Ag Valve assembly
DE4211551A1 (de) * 1992-04-06 1993-10-07 Rexroth Mannesmann Gmbh Verstellpumpe mit einem Druckbegrenzungs- und einem Druckzuschaltventil
DE4334167A1 (de) * 1993-10-07 1995-04-13 Rexroth Mannesmann Gmbh Hydraulisches System zur Beaufschlagung eines hydraulischen Verbrauchers mit einem geregelten Verbraucherdruck und Drosselventil, insbesondere zur Verwendung in einem solchen hydraulischen System

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008031390A1 (fr) * 2006-09-14 2008-03-20 Luk Lamellen Und Kupplungsbau Beteiligungs Kg système hydraulique d'amenée d'un fluide hydraulique à un consommateur
JP2010503798A (ja) * 2006-09-14 2010-02-04 ルーク ラメレン ウント クツプルングスバウ ベタイリグングス コマンディートゲゼルシャフト 消費器に作動液を供給するための液圧系

Also Published As

Publication number Publication date
EP1180598A3 (fr) 2003-04-16
DE10040737A1 (de) 2002-02-28
DE50111399D1 (de) 2008-03-13
EP1180598B1 (fr) 2006-11-08

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