公开(公告)号：US3788774A

公开(公告)日：1974-01-29

申请号：US3788774D

申请日：1973-01-10

Applicant: REXROTH GMBH G L

Inventor： ROESSLEIN H

IPC: F04B49/00

CPC classification number: F04B49/002 ,  F04B2201/1203 ,  Y10T137/8659

Abstract: An adjustable main pump whose output volume is controlled by a servomotor operated by an auxilliary pump controlled by control valves, is provided with pressure regulating cylinder and piston means receiving fluid from the auxilliary pump and supplying fluid to the servomotor through the control valves. A pressure responsive piston is controlled by high pressure fluid from the outlet of the adjustable main pump, and acts on the regulating piston, forming a variable throttle therewith for controlling the flow from the regulating cylinder to a low pressure discharge conduit, or to the servomotor, depending on the pressure exerted by the pressure responsive piston on the regulating piston, so that the product of pump pressure and pumped volume, representing the power output of the main pump, remains constant during regulating movement of the pressure responsive piston.

Abstract translation: 输出容量由由控制阀控制的辅助泵操作的伺服电机控制的可调节主泵设置有压力调节缸和活塞装置，其从辅助泵接收流体并通过控制阀将流体供应到伺服电动机。 压力响应活塞由可调节主泵的出口的高压流体控制，作用在调节活塞上，形成可变的节流阀，用于控制从调节气缸到低压排放管道的流量，或伺服电动机 取决于压力响应活塞对调节活塞施加的压力，使得代表主泵的功率输出的泵压力和泵送体积的乘积在压力响应活塞的调节运动期间保持恒定。