• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A pressure-limiting valve for hydraulic fluids comprises a stepped switching piston which is loaded by a closing spring to oppose high fluid pressure obtaining in an inflow duct of the valve. Radial transverse bores branch from an axially-extending bore in the switching piston. When the setting pressure established by the closing spring is exceeded, the transverse bores in the piston move past an O-ring seal as the piston compresses the spring, and pressure fluid thus flows from the axially-extending bore into a discharge duct of the valve. The stepped switching piston is guided in a pressure chamber by a portion of its cross-section which is greater than that in the zone of the O-ring seal. Adjacent the inflow duct, the axially-extending bore in the piston has a reduced flow cross-section. Further radial bores lead from the axially-extending bore in the piston in the region of the stepped portion of the latter.
    公开号:SU1324593A3
    申请号:SU833673054
    申请日:1983-12-08
    公开日:1987-07-15
    发明作者:Кригер Карл；Райнельт Вернер
    申请人:Херманн Хемшайдт Машиненфабрик Гмбх,Унд Ко (Фирма)；
    IPC主号:
    专利说明:

    The diagonal bore holes 14 communicated with the axial channel 7. When pressure is applied, the piston-spool 3, compressing the supper 4, moves to ensure that the working medium is drained through the axial 7 and radial 8 channels. Simultaneously on the stage tread
    one
    The invention relates to a valve and is intended to protect systems from overpressure in them beyond their allowable.
    The purpose of the invention is to increase the reliability of the device by providing an additional effect of the working medium on the piston-slide when the device is activated.
    Figs, 1 shows the valve in the initial position, of a general view; figure 2 - the same, when triggered.
    The safety valve contains a housing 1, in a stepped bore 2 of which there is a piston-spool 3, loaded on one side by a spring 4, and on the other - by pressure of HFA-liquid and having an axial internal opening 7 communicating with inlet 5 and outgoing from its radial bore holes 8 are of the same diameter. The sealing ring 9 is located in the groove 10, made in step 11 of said bore 2 of smaller diameter, the piston-spool is two-stage and its step 12 of larger diameter is located on the inlet side 5, while the channel 6 in the piston-spool 3 has a smaller cross section than the cross-section of the axial inner bore 7. On the outer surface of the front part of the larger stage I2 of the piston-hammer 3, a colder bore 13 is made, and in the area of the bore 13 in the piston-spool 3 additional radial grooves are made bore holes 14, telling axial inner hole 7 with the cavity of the bore 2 of the housing 1 of larger diameter.
    The safety valve operates as follows.
     the larger diameter of the piston-gaiter 3 causes a pressure differential, provided by the passage of the working medium through the additional holes 14, and the piston-spool 3 in the end of its working stroke rests on the body without impact. 2 Il.
    When the pressure of the working medium is supplied to the inlet 5 of the valve, which exceeds the installation, the spring 4 under the action of the force developed by this pressure,
    the piston-spool 3 is compressed and shifted to the side providing the opening of the valve (shown in Lig.2). Radial bore holes 8 pass by sealing ring 9
    and the working medium, the passageway, the axial inner bore .7 and the radial bore holes 8, are fed to the crosslink. With the passage of the throttle section, which are additional radial bore holes 14, a loss of fluid pressure occurs and a pressure differential occurs at the treads of a larger diameter piston -gold 3, which creates an additional force acting against the compression force of the stem 4 and the piston-spool 3 moves in the direction of the spring 4, leaning against the toroidal surface of the bore of the housing 1 in the run of its stroke without impact.
    权利要求:
    Claims (1)
    [1]
    Formula of Absorption
    A safety valve, containing a piston-spool with an axial internal bore, connected by a channel with an inlet, and located in the stepped bore of the body and loaded with a spindle on one side and pressure of the HFA-liquid on the other side. radial holes of the same diameter and a sealing ring located in a groove made in a step of said bore of a smaller diameter, the piston-spool is two-step and its step of a larger diameter is located on the inlet side, characterized in that In order to increase the reliability of operation, the said channel in the gold spool is made smaller than the cross-section than the cross-section of the axial inner bore on the outer surface of the end portion
    A larger piston-golder stoop is made with an annular bore; in the zone of the point you are in the lorshne-spool, additional radial bores are made, which communicate an axial inner bore with a bore cavity of a larger diameter case.
    Editor M. Petrov
    Compiled by L. Semenov
    Tehred N.Glushchenko Proofreader A. Ilyin
    Order 2976/59
    Circulation 811 Subscription
    VNISHI-USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, st. Project, 4
    , Figure 2
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1324593A3|1987-07-15|Safety valve
    US4541607A|1985-09-17|High-pressure ball valve
    US3981479A|1976-09-21|Check valve
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    US4984603A|1991-01-15|Flow control valve assembly
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    同族专利:
    公开号 | 公开日
    CS274712B2|1991-10-15|
    GB2133121A|1984-07-18|
    GB8332024D0|1984-01-04|
    DE3245667A1|1984-06-14|
    FR2537688A1|1984-06-15|
    GB2133121B|1986-04-23|
    CS922383A2|1991-03-12|
    ZA839034B|1984-07-25|
    HU187617B|1986-02-28|
    FR2537688B1|1985-06-21|
    US4552172A|1985-11-12|
    DE3245667C2|1986-09-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2886058A|1954-10-06|1959-05-12|Gilmer F Horton|High pressure check valve|
    US2890714A|1955-03-08|1959-06-16|Anderson Greenwood & Co|Pilot-operated relief valve|
    FR1149979A|1956-04-20|1958-01-03|Improvements to safety valves for pressurized fluid circuits|
    DE1254925B|1965-06-12|1967-11-23|Voith Gmbh J M|Spring-loaded pressure relief valve, especially for pressure rooms|
    GB1117550A|1966-01-20|1968-06-19|Gewerk Eisenhuette Westfalia|Pressure relief valve|
    DE1750834A1|1968-06-10|1971-04-29|Gewerk Eisenhuette Westfalia|Pressure relief valve cartridge with piston O-ring seal|
    DE1800524A1|1968-10-02|1970-05-14|Voith Gmbh J M|Spring-loaded pressure relief valve, especially for pressure rooms|
    DE1814154B2|1968-12-12|1978-09-07|Kloeckner-Humboldt-Deutz Ag, 5000 Koeln|Hydraulic pressure valve|
    GB1588727A|1977-07-19|1981-04-29|Gould Inc|Flow regulator|
    DE2736076A1|1977-08-10|1979-02-15|Kraftwerk Union Ag|RETURN FLOW VALVE WITH DAMPING DEVICE|DE3546557C2|1984-03-16|1989-06-15|Gat Grubenausbau Gmbh, 5840 Schwerte, De|Pressure relief valve|
    AU574451B2|1984-03-16|1988-07-07|Richard Voss Grubenausbau Gmbh|Pressure relief valve|
    DE3523548A1|1985-07-02|1987-01-15|Gewerk Eisenhuette Westfalia|PRESSURE LIMIT VALVE|
    US4949751A|1986-06-10|1990-08-21|Jacobs Brake Technology Corporation|Compression release retarder with valve motion modifier|
    US4898206A|1986-06-10|1990-02-06|The Jacobs Manufacturing Company|Compression release retarder with valve motion modifier|
    DE3637888A1|1986-11-06|1988-05-19|Gewerk Eisenhuette Westfalia|PRESSURE LIMIT VALVE, IN PARTICULAR FOR HYDRAULIC EXTENSION SYSTEMS|
    US5215116A|1989-05-19|1993-06-01|Richard Voss Grubenausbau Gmbh|Pressure-relief valve with stepped or double piston|
    EP0425621A1|1989-05-19|1991-05-08|Richard Voss Grubenausbau Gmbh|Pressure limiting valve with stepped or double piston|
    AU630996B2|1989-09-01|1992-11-12|Richard Voss Grubenausbau Gmbh|Pressure limiting valve with teflon seal|
    DE4004931C2|1990-02-16|1995-02-23|Rexroth Mannesmann Gmbh|Pilot operated pressure cut-off valve|
    PL164135B1|1990-02-22|1994-06-30|Quante Heinrich Berg Ing|Pressure limiting valve with stable spring seating|
    US5301711A|1993-08-02|1994-04-12|Molitor Arvid A|Flow control and measurement device|
    US5531513A|1994-12-16|1996-07-02|Kelsey-Hayes|High pressure accumulator/bypass valve with stationary high pressure seal|
    WO1999039092A1|1998-02-02|1999-08-05|Diesel Engine Retarders, Inc.|Self-clipping slave piston device with lash adjustment for a compression release engine retarder|
    WO2000011336A1|1998-08-19|2000-03-02|Diesel Engine Retarders, Inc.|Hydraulically-actuated fail-safe stroke-limiting piston|
    US6145805A|1999-08-23|2000-11-14|Caterpillar Inc.|Liquid control valve assembly with local damping and hydraulically actuated fuel injector using same|
    US6957634B2|2002-10-04|2005-10-25|Caterpillar Inc.|Engine valve actuator|
    US20050034766A1|2003-08-15|2005-02-17|Rado Gordon E.|By-pass pressure regulator|
    US7472914B2|2005-02-28|2009-01-06|Anderson Brian K|Suspension system|
    US20130180592A1|2011-09-12|2013-07-18|Baker Hughes Incorporated|Valve for Use in Chemical Injectors and the Like|
    CN106523474B|2016-10-10|2018-01-16|合肥协力液压科技有限公司|relief valve|
    CN106438542B|2016-10-10|2018-04-17|合肥协力液压科技有限公司|relief valve|
    CN106286451A|2016-10-10|2017-01-04|合肥协力液压科技有限公司|Relief valve|
    CN107061416B|2017-05-27|2018-04-27|安徽工程大学|A kind of Bingham fluid is without spool overflow mechanism and method|
    CN107061813A|2017-06-19|2017-08-18|太仓市宇航造纸机械厂|A kind of valve|
    US11118698B2|2018-07-23|2021-09-14|Pratt & Whiiney Canada Corp.|Damping mechanism for valves|
    JP2020153316A|2019-03-20|2020-09-24|日本電産トーソク株式会社|Reflux valve|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3245667A|DE3245667C2|1982-12-09|1982-12-09|Pressure relief valve for HFA fluids|
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