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    • 4. 发明公开
    • 스플릿압력보상기를가진유압제어밸브시스템
    • 液压控制阀系统采用分体式压力补偿器
    • KR1020000015981A
    • 2000-03-25
    • KR1019980709541
    • 1998-02-23
    • 허스코 인터내셔날, 인크.
    • 레인,마이클,씨.윌크,라우드,에이.페더슨,레이프파이크,마이클,제이.
    • F15B11/05
    • E02F9/2267E02F9/2203E02F9/2271E02F9/2296F15B11/163F15B11/165F15B11/168F15B2211/20546F15B2211/251F15B2211/30555F15B2211/3111F15B2211/31576F15B2211/324F15B2211/351F15B2211/50536F15B2211/5157F15B2211/528F15B2211/55F15B2211/6054F15B2211/7053F15B2211/71
    • PURPOSE: A pressure compensated hydraulic system is provided to supply a hydraulic fluid to more than one hydraulic operator. CONSTITUTION: An improved pressure-compensated hydraulic system for feeding hydraulic fluid to one or more hydraulic actuators (20). A remotely located, variable displacement pump (18) provides an output pressure equal to a control input pressure plus a constant margin. A pressure compensation system requires that a load-dependent pressure be provided to the pump input through a load sense circuit. An isolator (92) transmits the load-dependent pressure to the pump control input, while preventing fluid from leaving the load sense circuit and flowing to the remotely located pump (18). A valve section (13, 14, 15) which controls the fluid flow between the pump (18)and actuator (20) has a pressure compensating valve (48) with a piston (64) and a spool (60) controlling a pressure differential across a main control valve orifice (44) by moving within a bore (62) in response to a pressure differential between a pump supply pressure and the load sense pressure. The piston (64) and the spool (60) also separate to shut off fluid to the actuator (20) when the back pressure from the load exceeds the pump supply pressure.
    • 目的:提供压力补偿液压系统,以将液压油供应​​给多个液压操作员。 构成:用于将液压流体输送到一个或多个液压致动器(20)的改进的压力补偿液压系统。 位移可变的泵(18)提供等于控制输入压力加上恒定余量的输出压力。 压力补偿系统要求通过负载检测电路向泵输入提供与负载有关的压力。 隔离器(92)将负载相关压力传递到泵控制输入端,同时防止流体离开负载感测电路并流到远处位置的泵(18)。 控制泵(18)和致动器(20)之间的流体流动的阀部分(13,14,15)具有带有活塞(64)的压力补偿阀(48)和控制压差的阀芯(60) 通过响应于泵供应压力和负载感测压力之间的压力差在孔(62)内移动而穿过主控制阀孔(44)。 当来自负载的背压超过泵供应压力时,活塞(64)和阀芯(60)也分离以关闭致动器(20)的流体。