EP0740083A2 - Vanne d'arrêt avec une piston de vanne distributrice - Google Patents

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

Info

Publication number
EP0740083A2
EP0740083A2 EP96104154A EP96104154A EP0740083A2 EP 0740083 A2 EP0740083 A2 EP 0740083A2 EP 96104154 A EP96104154 A EP 96104154A EP 96104154 A EP96104154 A EP 96104154A EP 0740083 A2 EP0740083 A2 EP 0740083A2
Authority
EP
European Patent Office
Prior art keywords
pressure
piston
shuttle valve
bore
working medium
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
EP96104154A
Other languages
German (de)
English (en)
Other versions
EP0740083A3 (fr
EP0740083B1 (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 cut-off valve according to the preamble of the appended patent claim 1.
  • FIG. 3 Such a commercially available pressure cut-off valve is known from the applicant's catalog sheet RDE 92002-6.2.1 - L + B / 10.89 and is shown in FIG. 3 of the accompanying drawings.
  • the pressure cut-off valve 1 shown in FIG. 3 has a shuttle valve piston 2a, which is slidably arranged in a bore 3 of the pressure cut-off valve 1.
  • the shuttle valve piston 2a is displaceable between two end positions.
  • the shuttle valve piston 2a has an inner bore 4 which extends over its entire length and through which at least in one of the two end positions a measuring piston 5 for pressure cut-off (pressure limitation) is subjected to the higher pressure.
  • pressure cut-off pressure limitation
  • this pressure cut-off valve known from the prior art has no possibility of continuously flushing out a certain amount of working medium from the line having the respectively lower pressure in order to e.g. to supply cooling and / or cleaning.
  • a shuttle valve is known from DE 35 26 581-C2, the piston of which can be displaced between two end positions in one of two lines (6, 7) by fogging with the higher pressure of a working medium.
  • This shuttle valve also has no possibility of continuously flushing out a certain amount of working medium from the line having the lower pressure.
  • the present invention is therefore based on the object of providing a pressure cut-off valve according to the preamble of the appended patent claim 1, which permits continuous flushing out of the working medium from a line having a respectively lower pressure.
  • a pressure cut-off valve with a shuttle valve piston which is arranged in a bore in the pressure cut-off valve in a sliding manner and can be displaced in one of two lines between two end positions by the application of the higher pressure of a working medium
  • the shuttle valve piston optionally being one extending over its entire length has an inner bore through which a measuring piston for pressure cutoff is acted upon by the higher pressure in at least one of the two end positions of the shuttle valve piston, and which is characterized in that the shuttle valve piston is designed so that a connection between the two end positions only the line with the lower 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 the shuttle valve piston forming an essential part of the present invention can be integrated into the bore of the above-mentioned commercially available pressure cut-off valve.
  • FIGS. 1 and 2 show a pressure cut-off valve 1 with a shuttle valve piston 2b.
  • the shuttle valve piston 2b is slidably arranged in a bore 3 of the pressure cut-off valve 1 and is acted upon by the respectively higher pressure of a working medium supplied through the lines A and B.
  • the two lines A and B can z. B. the high and low pressure lines of a hydrostatic engine or the like.
  • the shuttle valve piston 2b as shown in FIGS. 1 and 2 2, is displaced into a lower end position by the higher pressure acting on its upper end. He sits with its lower end on an end cap 16.
  • the working medium from line B with the higher pressure acts directly on a measuring piston 5 located at the corresponding end of the bore 3 of the pressure cutoff valve 1 for pressure cutoff.
  • the measuring piston 5 is arranged in the extension of the longitudinal axis of the bore 3 and the shuttle valve piston 2b in a bore adjoining the bore 3 for receiving the measuring piston 5.
  • the working medium enters line B through an inlet opening 12 located laterally on the bore 3 into the upper end of the bore 3 in FIGS. 1 and 2.
  • the measuring piston 5 for pressure cut-off works in a known manner. At a certain set high pressure value, a spring pushing down the measuring piston 5 is compressed, and the working medium under pressure is discharged via the control edge (5.2) of the control piston (5.1).
  • the working medium of line B which is under a higher pressure, pushes the shuttle valve piston 2b into its lower end position.
  • a connection to one or two flushing orifices 7 is released to the working medium coming from line A through inlet port 14 onto the shuttle valve piston at a lower pressure.
  • the flushing opening is located between the inlet openings 12 and 14 in the pressure cutoff valve 1 and leads to a flushing line 18.
  • the pressure cutoff valve 1 can also have a further flushing opening 7 in its opposite wall.
  • the flushing line 18 leads to a tank in which the flushed-out working medium is cleaned and cooled, or to the housing of a hydrostatic engine, where the working medium is used to lubricate the engine, 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.
  • the upper sealing element 9 seals the high-pressure side, which is formed by the line B, the inlet and outlet openings 12 and 13 and the upper end of the bore, from the low pressure side in which the rinsing of the working medium from line A to the rinsing opening 7 takes place.
  • the lower sealing element 9 of the shuttle valve piston 2b is arranged thereon or has such a width that the working medium arriving from the line A through the inlet opening 14 finds a passage between the inner edge of the lower sealing element 9 and the outer edge of the inlet opening 14 which it can reach the flush opening 7.
  • the lower sealing element 9 does not close the outlet opening, so that Working medium can continue to flow from the inlet opening 14 to the outlet opening 15.
  • the shuttle valve piston 2b is designed such that the working medium entering between the sealing element 9 and the inlet opening 14 can reach the flushing opening 7.
  • the shuttle valve piston between the two sealing elements 9 consists of several sections 8, the cross-sectional area of which is smaller than the cross-sectional area of the bore 3 of the pressure cut-off valve 1.
  • the sections 8 have a smaller diameter than the bore 3.
  • FIGS. 1 and 2. Three such sections 8 are shown in FIGS. 1 and 2. Cavities are thus formed between the outer surfaces of these sections 8 and the inner wall of the bore 3, which create the connection 6 between the low-pressure line A and the flushing opening 7.
  • the shuttle valve piston has throttle elements 10, by means of which the amount of the working medium flushed out is limited.
  • these throttle elements 10 are formed by throttle sections, the cross-sectional area of which is smaller than the cross-sectional area of the bore 3 but larger than the cross-sectional area of the sections 8.
  • the flushed out working medium thus finds smaller passage openings at the location of these throttle sections, and is throttled.
  • the throttle sections In the case of a cylindrical shuttle valve piston 2b and a cylindrical bore 3, the throttle sections have a diameter which lies between the diameter of the sections 8 and the diameter of the bore 3.
  • the throttle sections have one or more axial or longitudinal grooves 11, by means of 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 of symmetrical design, so that the function according to the invention is given even when the flow direction of the working medium is reversed or the high and low pressure sides are interchanged.

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)
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
DE19512143 1995-03-31
DE19512143A DE19512143C1 (de) 1995-03-31 1995-03-31 Druckabschneidungsventil mit Wechselventilkolben

Publications (3)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1176315A3 (fr) * 2000-07-21 2003-11-12 Brueninghaus Hydromatik Gmbh Soupape de commutation commandable
CN103321983A (zh) * 2013-07-02 2013-09-25 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
CN121676367A (zh) * 2025-12-08 2026-03-17 江苏汇智高端工程机械创新中心有限公司 一种压力切断阀、闭式柱塞泵系统及工程机械

Families Citing this family (3)

* 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
DE102004061861B4 (de) 2004-12-22 2008-06-19 Brueninghaus Hydromatik Gmbh Druckabschneidungsventileinheit und damit versehener hydraulischer Kreislauf
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118244A1 (de) 1991-06-04 1992-12-10 Heinz Hessler Ventilanordnung eines hebesystems mit lastabhaengiger druckbegrenzung
DE3526581C2 (de) 1985-07-25 1994-06-23 Vos Richard Grubenausbau Gmbh Wechselventil

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3921292A1 (de) * 1989-06-29 1991-01-10 Rexroth Mannesmann Gmbh Vorgesteuertes druckbegrenzungsventil

Patent Citations (2)

* 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
DE4118244A1 (de) 1991-06-04 1992-12-10 Heinz Hessler Ventilanordnung eines hebesystems mit lastabhaengiger druckbegrenzung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1176315A3 (fr) * 2000-07-21 2003-11-12 Brueninghaus Hydromatik Gmbh Soupape de commutation commandable
CN103321983A (zh) * 2013-07-02 2013-09-25 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
CN121676367A (zh) * 2025-12-08 2026-03-17 江苏汇智高端工程机械创新中心有限公司 一种压力切断阀、闭式柱塞泵系统及工程机械

Also Published As

Publication number Publication date
EP0740083A3 (fr) 1998-07-01
DE59606427D1 (de) 2001-03-22
DE19512143C1 (de) 1996-07-25
EP0740083B1 (fr) 2001-02-14

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