EP0764785A3 - Directional spool valve with extensive valve seat - Google Patents

Directional spool valve with extensive valve seat Download PDF

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Publication number
EP0764785A3
EP0764785A3 EP96106249A EP96106249A EP0764785A3 EP 0764785 A3 EP0764785 A3 EP 0764785A3 EP 96106249 A EP96106249 A EP 96106249A EP 96106249 A EP96106249 A EP 96106249A EP 0764785 A3 EP0764785 A3 EP 0764785A3
Authority
EP
European Patent Office
Prior art keywords
valve
longitudinal slide
fine control
consumer connection
cone
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
EP96106249A
Other languages
German (de)
French (fr)
Other versions
EP0764785A2 (en
EP0764785B1 (en
Inventor
Hartmut Dipl.-Ing. Sandau (Fh)
Werner Dipl.-Ing. Schumacher
Rainer Dipl.-Ing. Trucksess (Fh)
Holger Dipl.-Ing. Lueues
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0764785A2 publication Critical patent/EP0764785A2/en
Publication of EP0764785A3 publication Critical patent/EP0764785A3/en
Application granted granted Critical
Publication of EP0764785B1 publication Critical patent/EP0764785B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices
    • F15B13/015—Locking-valves or other detent i.e. load-holding devices using an enclosed pilot flow valve

Abstract

Die Erfindung betrifft ein Längsschieberventil mit zwei in einem Ventilgehäuse koaxial angeordneten, in einigen Bereichen zylindrisch ausgebildeten Längsschiebern (140,147), von denen der erste (140) den Druckmittelstrom zwischen mindestens einem Verbraucheranschluß und mindestens einem Rücklaufanschluß entlang seinem Ventilkegel und seinem Feinsteuerbereich führt. Der zweite Längsschieber (147), der im ersten (140) gelagert und geführt ist, leitet elektromagnetisch angesteuert aus dem Verbraucheranschluß (50) abgezweigtes Druckmittel bei Bedarf für die Öffnungsbewegung des ersten Längsschiebers (140) primär vor eine von dessen Stirnseiten um. Dabei steht ein vor der anderen Stirnseite des ersten Längsschiebers (140) angeordneter Druckraum (135) in der Sperrstellung hydraulisch mit dem Verbraucheranschluß (50) in Verbindung.The invention relates to a longitudinal slide valve with two in one Valve housing arranged coaxially, in some areas cylindrical longitudinal slides (140, 147), of which the first (140) the pressure medium flow between at least one consumer connection and at least one return port along its Valve plug and its fine control range leads. The second Longitudinal slide (147), which is mounted and guided in the first (140), conducts electromagnetically controlled branched off from the consumer connection (50) Pressure medium for the opening movement of the first longitudinal slide (140) primarily in front of one of its end faces around. One is in front of the other end of the first Longitudinal slide valve (140) arranged pressure chamber (135) in the blocking position hydraulically connected to the consumer connection (50).

Zur Schaffung einer geringeren Flächenpressung im Ventilsitz (146) des ersten Längsschiebers wird der mittlere Durchmesser der kegelmantelförmigen Dichtfläche von dessen Ventilkegel (148) größer ausgelegt als der maximale Durchmesser des nachgeordneten Feinsteuerbereichs. Zusätzlich wird zur Vermeidung von Unstetigkeiten im Ventilregelverhalten der Feinsteuerbereich mit einer relativ großen positiven Überdeckung ausgestattet.

Figure 00000001
In order to create a lower surface pressure in the valve seat (146) of the first longitudinal slide, the mean diameter of the cone-shaped sealing surface of its valve cone (148) is designed to be larger than the maximum diameter of the downstream fine control area. In addition, in order to avoid discontinuities in the valve control behavior, the fine control area is equipped with a relatively large positive overlap.
Figure 00000001
EP96106249A 1995-09-22 1996-04-20 Directional spool valve with extensive valve seat Expired - Lifetime EP0764785B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19535223 1995-09-22
DE19535223A DE19535223A1 (en) 1995-09-22 1995-09-22 Longitudinal slide valve with large valve seat

Publications (3)

Publication Number Publication Date
EP0764785A2 EP0764785A2 (en) 1997-03-26
EP0764785A3 true EP0764785A3 (en) 1998-06-03
EP0764785B1 EP0764785B1 (en) 2001-11-28

Family

ID=7772862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96106249A Expired - Lifetime EP0764785B1 (en) 1995-09-22 1996-04-20 Directional spool valve with extensive valve seat

Country Status (2)

Country Link
EP (1) EP0764785B1 (en)
DE (2) DE19535223A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1128109A1 (en) 2000-02-22 2001-08-29 Siemens Building Technologies AG Valve for control device
US7392971B2 (en) 2003-04-10 2008-07-01 Bosch Rexroth Ag Infinitely variable directional valve
RU2552211C1 (en) * 2014-05-05 2015-06-10 Валерий Владимирович Бодров Multi-purpose valve
RU2766379C1 (en) * 2021-07-12 2022-03-15 Артур Олегович Бурков Indirect action safety device for hydraulic systems

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4140604A1 (en) * 1991-12-10 1993-06-17 Bosch Gmbh Robert CONTROL DEVICE FOR THE VOLUME FLOW OF A HYDRAULIC WORKING AGENT

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4140604A1 (en) * 1991-12-10 1993-06-17 Bosch Gmbh Robert CONTROL DEVICE FOR THE VOLUME FLOW OF A HYDRAULIC WORKING AGENT

Also Published As

Publication number Publication date
EP0764785A2 (en) 1997-03-26
EP0764785B1 (en) 2001-11-28
DE59608303D1 (en) 2002-01-10
DE19535223A1 (en) 1997-03-27

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