• 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 piston valve construction effects leakage reduction in a control valve for hydraulic steering systems by reducing the wetted circumference of a portion of a piston valve collar with the use of radial recesses therein diverting a portion of flow therefrom to a groove of the piston valve which effects smoothing of turbulence of flow from said recesses followed by flow from said groove through a throttling gap to effect a laminar flow.
    公开号:SU893143A3
    申请号:SU802878747
    申请日:1980-01-24
    公开日:1981-12-23
    发明作者:Ланг Армин
    申请人:Цанрадфабрик Фридрихсхафен (Инофирма)；
    IPC主号:
    专利说明:

    (54) HYDRO DISTRIBUTOR
    The invention relates to a volumetric hydraulic drive and can be used, for example, in hydrostatic control systems. A hydraulic distributor for controlling hydraulic fluid of hydraulic systems, in particular hydrostatic control of automobiles, is known, comprising a housing with a cylindrical bore and a spool with grooves and shoulders mounted in the latter with axial movement, which have grooves distributed around the circumference and forming slots . The grooves on the clamps are made to provide a high sensitivity of the distributor while maintaining the tightness inherent in the spools forming considerable overlaps with the grooves of the housing. High tightness in hydrostatic systems is necessary to accurately synchronize the movement of the handheld steering wheel of the pump control with the servomotor 1. However, the hydraulic distributor has insufficient tightness and considerable production noise due to the turbulent flow through the valve. The purpose of the invention is to reduce leaks and reduce production noise. . The goal is achieved by the fact that the spool is provided with additional bridges located between the groove and the shoulders and forming with the last ring nozzles, and with the body throttle gaps. In this case, the grooves are made in the form of radially arranged holes. FIG. I presents the hydraulic distributor, longitudinal section; in fig. 2 is an enlarged image of the throttling slots of the distributor. The valve includes a housing I with a cylindrical bore 2 and installed in the latter with the possibility of axial movement of the spool 3 with a groove 4 and shoulders 5 and b, on which grooves 7 and 8 distributed around the circumference are formed, forming with throttles 11 and 10 of the housing I and 10 12. The spool 3 is equipped with additional sections 13 and 14, located between the groove 4 and the shoulders 5 and b and forming annular recesses 15 and
    权利要求:
    Claims (2)
    [1]
    Claim
    1. A control valve for controlling the working fluid of hydraulic systems, in particular a hydrostatic control of a vehicle, comprising a housing with a cylindrical hole and mounted in the latter with axial movement with a spool with a groove and collars, on which grooves distributed around the circumference are made, forming throttling grooves with the body grooves slots, characterized in that, in order to reduce leaks and reduce production noise, the spool is equipped with additional bands located between groove and collars and forming with the latter annular recesses, and with the body 15 throttle clearances.
    [2]
    2. The control valve according to claim 1, characterized in that the grooves are made in the form of a radially
    20 located holes.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU893143A3|1981-12-23|Hydraulic distributor
    SU973010A3|1982-11-07|Directional valve for vehicle steering system
    US3021869A|1962-02-20|Rotary type hydraulic valve
    KR910012582A|1991-08-08|Hydraulic valve assembly
    US2952275A|1960-09-13|Valve
    US5193915A|1993-03-16|Device for delivering pressurized fluid from a stationary part to a rotatable shaft
    US2526361A|1950-10-17|Control valve for fluid servomotors
    US6523513B2|2003-02-25|Camshaft timing device for internal combustion engines
    GB1449660A|1976-09-15|Vehicular power steering systems
    US3363651A|1968-01-16|Rotary fluid valve
    KR960702581A|1996-04-27|Hydraulic cylinder speed control method and device
    US3832933A|1974-09-03|Auxiliary power steering device for vehicles with pressure accumulators
    SU695544A3|1979-10-30|Hydraulic booster for a steering system of a vehicle
    US4459952A|1984-07-17|Cylinder deactivator device for diesel engines
    GB1381393A|1975-01-22|Gerotor-type rotary fluid pressure devices
    US4176548A|1979-12-04|Hydrostatic torque measuring device for rotating shafts
    US4214643A|1980-07-29|Automotive vehicle power steering system
    US2985190A|1961-05-23|Pilot valves having circular outlet ports modified to have the gain characteristics of square ports
    SU901644A1|1982-01-30|Centrifugal pump
    GB1393023A|1975-05-07|Steering valve
    US3308721A|1967-03-14|Hydraulic rotary servo mechanism
    SU437873A1|1974-07-30|Throttle
    US4690624A|1987-09-01|Fuel injection pump for internal combustion engines
    SU1090269A3|1984-04-30|Rotary hydraulic pilot directional valve
    SU378661A1|1973-04-18|MULTI-SECTIONAL ZOLOTNIKOVYY HYDRAULIC
    同族专利:
    公开号 | 公开日
    JPS5599470A|1980-07-29|
    IN151945B|1983-09-10|
    DK149512B|1986-07-07|
    GB2042440A|1980-09-24|
    ES254181Y|1981-11-01|
    ES254181U|1981-02-16|
    DE2902751B1|1980-06-26|
    DK18580A|1980-07-26|
    US4313467A|1982-02-02|
    PL221371A1|1980-09-08|
    DK149512C|1986-12-15|
    YU304379A|1984-12-31|
    BG46602A3|1990-01-15|
    JPS6325989B2|1988-05-27|
    AR219203A1|1980-07-31|
    DE2902751C2|1981-03-12|
    BR8000422A|1980-09-30|
    DD148659A5|1981-06-03|
    FR2447503B1|1983-12-23|
    GB2042440B|1983-02-02|
    YU41194B|1986-12-31|
    FR2447503A1|1980-08-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2812775A|1956-09-10|1957-11-12|New York Air Brake Co|Stabilizing means for high pressure hydraulic valves of the plunger type|
    DE1755792C3|1968-06-22|1979-02-15|Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen|Power steering device, in particular for motor vehicles|
    CS148407B1|1969-11-03|1973-02-22|
    DE2221238C2|1972-04-29|1981-11-19|Integral Hydraulik & Co, 4000 Düsseldorf|Arrangement to reduce the cavitation noise on the control piston|
    DE2557235C3|1975-12-19|1979-04-19|O & K Orenstein & Koppel Ag, 1000 Berlin|Spool piston for hydraulic multi-way valves|DE3119101C2|1981-05-14|1988-12-08|Mannesmann Rexroth Gmbh, 8770 Lohr, De|
    JPS6148026B2|1983-06-01|1986-10-22|Honda Motor Co Ltd|
    US4666073A|1984-07-25|1987-05-19|Dufour Kenneth S|Spring biased spool type valve controller for a pneumatic dual diaphragm control system|
    JPH048668B2|1985-03-06|1992-02-17|
    JPS63166870U|1987-04-20|1988-10-31|
    US4779646A|1987-07-15|1988-10-25|Trw Inc.|Fluid flow control valve|
    GB8717963D0|1987-07-29|1987-09-03|Vickers Systems Ltd|Spool|
    JPH0229688U|1988-08-11|1990-02-26|
    US4941508A|1989-12-28|1990-07-17|Dana Corporation|Force balanced hydraulic spool valve|
    JPH0431372U|1990-07-10|1992-03-13|
    GB9712327D0|1997-06-13|1997-08-13|Seddon Donald|Hydraulic valves and systems|
    KR100496650B1|2002-06-27|2005-06-22|주식회사 한화|Flow force compensating spool valve and hydraulic valve, pneumatic valve, three-way control valve, four-way control valve using it|
    US7600737B2|2007-04-13|2009-10-13|Honeywell International Inc.|Cutback poppet valve|
    WO2013090728A2|2011-12-15|2013-06-20|Eaton Corporation|Flow directing spool for valve|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2902751A|DE2902751C2|1979-01-25|1979-01-25|Control valve|
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