公开(公告)号：US3817153A

公开(公告)日：1974-06-18

申请号：US29269672

申请日：1972-09-27

Applicant: REXROTH GMBH G L

Inventor： ZUNZER E

IPC: F15B1/027 ,  F15B11/17 ,  F15B11/16 ,  F15B1/02

CPC classification number: F15B11/17 ,  F15B1/027 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/25 ,  F15B2211/3116 ,  F15B2211/329 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/7142

Abstract: A plurality of valve units, each including a plurality of main valves connected in series in an idling conduit connecting the outlet of a control pump with a discharge space, is used for supplying hydraulic consumer motors with pressure fluid. Each main valve has an idling position for connecting the outlet of the pump with the discharge space through the idling conduit, and two operative positions for supplying and discharging fluid from the respective consumer motor, and for closing the idling circuit. Each main valve includes hydraulic operating means for shifting the main valve between idling and operative positions. A plurality of control valves supplies fluids to and discharge fluids from the hydraulic operating means, and a pressure control unit connects the idling conduit with the control valves. the pressure control unit includes a pressure reducing valve, a pressure fluid accumulator, a check valve between the accumulator and the pressure reducing valve so that a selected pressure is maintained in the hydraulic operating means when the respective main valve is in one of the operating positions. Preferably, a pressure limiting valve is arranged downstream of the pressure reducing valve, and has a higher pressure than the same. A pressurizing valve is provided between the idling conduit and the discharge space for maintaining a pressure in the idling conduit by which the operation of the operating means is started.

Abstract translation: 多个阀单元，其各自包括多个主阀，其串联连接在连接控制泵的出口和排出空间的空转导管中，用于向液压消费者电动机提供压力流体。 每个主阀具有怠速位置，用于通过怠速导管连接泵的出口和排出空间，以及用于从相应的消耗电动机供应和排出流体并且用于关闭怠速回路的两个操作位置。 每个主阀包括用于在空转和操作位置之间移动主阀的液压操作装置。 多个控制阀向液压操作装置供应流体并从液压操作装置排出流体，压力控制单元将空转导管与控制阀连接。 压力控制单元包括减压阀，压力流体蓄能器，蓄能器和减压阀之间的止回阀，使得当相应的主阀处于操作位置之一时，液压操作装置中保持选定的压力 。 优选地，压力限制阀布置在减压阀的下游，并且具有比其更高的压力。 在空转管道和排放空间之间设置有加压阀，用于维持起动操作装置的操作的空转管道中的压力。