EP0740083B1 - Vanne d'arrêt avec une piston de vanne distributrice - Google Patents

Vanne d'arrêt avec une piston de vanne distributrice Download PDF

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Publication number
EP0740083B1
EP0740083B1 EP96104154A EP96104154A EP0740083B1 EP 0740083 B1 EP0740083 B1 EP 0740083B1 EP 96104154 A EP96104154 A EP 96104154A EP 96104154 A EP96104154 A EP 96104154A EP 0740083 B1 EP0740083 B1 EP 0740083B1
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure cut
valve
shuttle valve
bore
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
EP96104154A
Other languages
German (de)
English (en)
Other versions
EP0740083A2 (fr
EP0740083A3 (fr
Inventor
Ralph Hinz
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
Original Assignee
Brueninghaus Hydromatik 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 Brueninghaus Hydromatik GmbH filed Critical Brueninghaus Hydromatik GmbH
Publication of EP0740083A2 publication Critical patent/EP0740083A2/fr
Publication of EP0740083A3 publication Critical patent/EP0740083A3/fr
Application granted granted Critical
Publication of EP0740083B1 publication Critical patent/EP0740083B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors

Definitions

  • the present invention relates to a pressure cutoff valve according to the The preamble of the appended patent claim 1.
  • the pressure cut-off valve 1 shown in FIG. 3 has a shuttle valve piston 2a, which in a bore 3 of the Pressure cutoff valve 1 is slidably disposed.
  • a shuttle valve piston 2a By applying the each higher pressure of a working medium in one of two lines A, B, the z. B. by lines of the high and low pressure side of an axial piston machine or the like. can be formed, the shuttle valve piston 2a between two end positions slidable.
  • the shuttle valve piston 2a has one over its entire length Length extending inner bore 4 through which at least in one of the two End position a measuring piston 5 for pressure cutoff (pressure limitation) with the higher pressure is applied.
  • pressure cutoff pressure limitation
  • a pressure relief valve which has a pendulum element and a pressure relief valve axially aligned with this in a bore, which in turn is controlled by a pilot valve.
  • the valve has two inlets, one opens above the pressure relief valve and one below, but above the Pendulum element.
  • the upper inlet is via an overflow channel with an annular groove in the Pendelements and another channel in the pendulum element with the room in connection under the pendulum element.
  • the pendulum element has an inner bore the pressure is on and over this in one of the two end positions of the pendulum element of the upper inlet ultimately passed on to the pilot valve.
  • Pressure relief valves (1, 2) are also known from DE 41 18 244-A1, However, the pistons are not designed as shuttle valve pistons, which by Exposure to the higher pressure of a working medium in one of two lines can be moved.
  • the present invention is therefore based on the object Pressure cut-off valve according to the preamble of appended claim 1 to create a continuous flushing of the working medium from one lower pressure line allowed.
  • the shuttle valve piston possibly one has inner bore extending over its entire length, through which Volumetric flask for pressure cutoff at least in one of the two end positions of the Shuttle valve piston is acted on by the higher pressure, and this is characterized in that the shuttle valve piston is designed so that in both End positions a connection between only the line with the lower one Pressure and at least one flushing opening for flushing out the working medium is released.
  • the main advantage of the pressure cut-off valve according to the present Invention lies in the simple, space-saving and very inexpensive design. Another great advantage is that it is an integral part of the present Invention shuttle valves in the bore of the above commercially available pressure cut-off valve can be integrated.
  • FIG. 1 and 2 show a pressure cut-off valve 1 with a Shuttle valve piston 2b.
  • the shuttle valve piston 2b is in a bore 3 of the Pressure cut-off valve 1 is slidably arranged and is replaced by the higher one Pressure of a working medium supplied through lines A and B is applied.
  • the two lines A and B can z. B. the high and low pressure lines a hydrostatic engine or the like.
  • the shuttle valve piston 2b is located in, as shown its lower end position, the working medium from line B acts on it the higher pressure directly at the corresponding end of the bore 3 of the Pressure cut-off valve 1 located measuring piston 5 for pressure cut-off.
  • the measuring piston 5 is in the extension of Longitudinal axis of the bore 3 and the shuttle valve piston 2b in one to the Bore 3 adjoining bore for receiving the volumetric flask 5 is arranged.
  • the Working medium emerges from line B through a side of the hole 3 located inlet opening 12 in the upper end of the bore in Figures 1 and 2 on. At the same end of the bore 3 is located directly opposite the inlet opening 12 the corresponding outlet opening 13 for the supplied through line B.
  • Working medium By extending over the entire length of the shuttle valve piston 2b extending inner bore 4 becomes the working medium having the higher pressure the line B to the end cap 16, which has a bore 17 through which that the higher pressure working medium additional functions are supplied can.
  • the measuring piston 5 for pressure cut-off works in a known manner. At a a certain set high pressure value will depress the volumetric flask 5 Spring compressed, and the pressurized working medium is over the Control edge (5.2) of the control piston (5.1) removed.
  • the working medium of line B which is under a higher pressure, presses the Shuttle valve piston 2b in its lower end position. This is due to the special constructive design of the shuttle valve piston from line A through the Inlet opening 14 with the working medium hitting the shuttle valve piston lower pressure a connection to one or two rinsing openings 7 released.
  • the rinsing opening is located between the Inlet openings 12 and 14 in the pressure cut-off valve 1 and leads to a Flushing line 18.
  • the pressure cut-off valve 1 can also in its opposite wall have a further flushing opening 7.
  • the flush line 18 leads to a tank in which the rinsed working medium is cleaned and cooled becomes, or to the housing of a hydrostatic engine, where the working medium for lubricating the motor, the pump or the like.
  • the shuttle valve piston 2b has at its upper and at its lower end Sealing elements or sections 9, which have the same cross-sectional area as the bore 3 of the pressure cut-off valve. In this way it seals in the 1 and 2 shown lower end position of the shuttle valve piston the upper Sealing element 9 the high pressure side, through line B, the input and the Outlet openings 12 and 13 and the upper end of the bore is formed by the Low pressure side, in which the rinsing of the working medium from line A to Rinsing opening 7 takes place.
  • the lower sealing element 9 of the shuttle valve piston 2b is arranged on this or has such a width that that of the line A arriving through the inlet opening 14 working medium between the inner edge of the lower sealing element 9 and the outer edge of the inlet opening 14 one Passage finds through which it can reach the flushing opening 7.
  • the lower Sealing element 9 does not close the outlet opening, so that Working medium continue to flow from the inlet opening 14 to the outlet opening 15 can.
  • the Shuttle valve piston 2b designed so that between the sealing element 9 and the working medium entering the inlet opening 14 can reach the flushing opening 7.
  • the shuttle valve piston exists between the two Sealing elements 9 from several sections 8, whose cross-sectional area is smaller than is the cross-sectional area of the bore 3 of the pressure cutoff valve 1.
  • the sections 8 have a smaller diameter than the bore 3 exhibit.
  • Three such sections 8 are shown in FIGS. 1 and 2. Between the outer surfaces of these sections 8 and the inner wall of the bore 3 are thus Cavities formed, the connection 6 between the low pressure line A and the Make rinse opening 7.
  • the shuttle valve piston has throttle elements 10, which limits the amount of working fluid flushed out.
  • these throttle elements 10 are formed by throttle sections, the Cross-sectional area smaller than the cross-sectional area of the bore 3, but larger than that Cross-sectional area of the sections 8 is. The rinsed working medium therefore takes place on These throttle sections locate smaller openings and are throttled. in the In the case of a cylindrical shuttle valve piston 2b and a cylindrical bore 3 the throttle sections have a diameter that is between the diameter the sections 8 and the diameter of the bore 3 is.
  • the throttle sections have one or several axial or longitudinal grooves 11 through which the flow of the flushed out Working medium between the line A and the flushing opening 7 is limited.
  • the shuttle valve piston 2b is preferably symmetrical, so that also at a reversal of the flow direction of the working medium or an exchange the high and low pressure side is given the function according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Driven Valves (AREA)

Claims (7)

  1. Vanne d'arrêt de pression (1) comportant un piston de vanne à alternance ou vanne distributrice (2b), piston qui est disposé de façon coulissante dans un alésage (3) de la vanne d'arrêt (1) et qui est déplaçable sous l'effet de l'alimentation de la pression respectivement la plus élevée d'un agent de travail dans une des deux conduites (A,B) entre deux positions d'extrémité; moyennant quoi, le piston de la vanne distributrice (2b) munie d'un alésage intérieure (4) s'étendant sur toute sa longueur, par lequel un piston de mesure (5) destiné à couper la pression au moins dans l'une des deux positions d'extrémité du piston de la vanne distributrice (2b), est sollicité par la pression la plus élevée,
    caractérisée en ce que,
    le piston de la vanne à alternance ou vanne distributrice (2b) est conçu de telle sorte qu'également pendant la coupure de pression dans les deux positions d'extrémité, il n'est libéré qu'une communication (6) entre la conduite (A ou B) avec la pression respectivement la plus basse et au moins une ouverture de rinçage ou balayage (57) pour expulser l'agent de travail.
  2. Vanne d'arrêt de pression selon la revendication 1,
    caractérisée en ce que
    le piston de la vanne distributrice (2b) comporte au moins sur une extrémité un élément d'étanchéité (9) qui, dans la position d'extrémité correspondante, forme une étanchéité entre la conduite A ou B) avec la pression la plus élevée et au moins une ouverture de rinçage ou balayage (7).
  3. Vanne d'arrêt de pression selon la revendication 1 ou 2,
    caractérisée en ce que
    le piston de la vanne distributrice (2b) présente dans la direction longitudinale des sections dont la face en coupe transversale est inférieure à la face en coupe transversale de l'alésage (3) de la soupape d'arrêt de pression (1) et qui, de cette manière, forment la communication (6) pour le rinçage ou balayage d'expulsion de l'agent de travail.
  4. Vanne d'arrêt de pression selon la revendication 3,
    caractérisée en ce que
    entre les sections (8) sont prévus des éléments d'étranglement (10) qui limitent la quantité de l'agent de travail expulsée par rinçage.
  5. Vanne d'arrêt de pression selon la revendication 4,
    caractérisée en ce que les éléments d'étranglement (10) sont formés par des sections d'étranglement dont la face en coupe transversale est supérieure à celle des sections (8) et inférieure à celle de l'alésage (3).
  6. Vanne d'arrêt de pression selon la revendication 5,
    caractérisée en ce que les sections d'étranglement présentent des rainures ou gorges axiales (11).
  7. Vanne d'arrêt de pression selon l'une des revendications précédentes, caractérisée par une conception symétrique du piston de vanne distributrice (2b) de telle sorte que sélectivement l'une des conduites A ou B se trouve être la conduite avec la pression la plus élevée.
EP96104154A 1995-03-31 1996-03-15 Vanne d'arrêt avec une piston de vanne distributrice Expired - Lifetime EP0740083B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19512143A DE19512143C1 (de) 1995-03-31 1995-03-31 Druckabschneidungsventil mit Wechselventilkolben
DE19512143 1995-03-31

Publications (3)

Publication Number Publication Date
EP0740083A2 EP0740083A2 (fr) 1996-10-30
EP0740083A3 EP0740083A3 (fr) 1998-07-01
EP0740083B1 true EP0740083B1 (fr) 2001-02-14

Family

ID=7758468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96104154A Expired - Lifetime EP0740083B1 (fr) 1995-03-31 1996-03-15 Vanne d'arrêt avec une piston de vanne distributrice

Country Status (2)

Country Link
EP (1) EP0740083B1 (fr)
DE (2) DE19512143C1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10019254C2 (de) * 2000-04-18 2002-04-25 Brueninghaus Hydromatik Gmbh Drucksteuerventil
DE10035628C2 (de) * 2000-07-21 2002-06-06 Brueninghaus Hydromatik Gmbh Steuerbares Umschaltventil
DE102004061861B4 (de) 2004-12-22 2008-06-19 Brueninghaus Hydromatik Gmbh Druckabschneidungsventileinheit und damit versehener hydraulischer Kreislauf
CN103321983B (zh) * 2013-07-02 2016-04-06 中航力源液压股份有限公司 一种提高液压变量马达恒压截断性能的方法及恒压截断阀
DE102016215214A1 (de) 2016-08-16 2018-02-22 Zf Friedrichshafen Ag Getriebevorrichtung mit mehreren über hydraulisch betätigbare Kolben-Zylinder-Einrichtungen verstellbare Schaltstangen ein- und auslegbaren Übersetzungen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3526581C2 (de) * 1985-07-25 1994-06-23 Vos Richard Grubenausbau Gmbh Wechselventil
DE3921292A1 (de) * 1989-06-29 1991-01-10 Rexroth Mannesmann Gmbh Vorgesteuertes druckbegrenzungsventil
DE4118244C2 (de) * 1991-06-04 1994-05-26 Heinz Hessler Ventilanordnung eines Hebesystems mit lastabhängiger Druckbegrenzung

Also Published As

Publication number Publication date
DE19512143C1 (de) 1996-07-25
EP0740083A2 (fr) 1996-10-30
EP0740083A3 (fr) 1998-07-01
DE59606427D1 (de) 2001-03-22

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