Infinitely variable pump system - can supply several hydraulic users and is regulated by varying load pressures

摘要

The variable delivery pump (2) has an adjustment range through zero to negative. It is mounted parallel to a fixed delivery pump (1). When the valves (6,7,8) are in their neutral position, the connections to the users (9,10,11) are closed and the flow from the fixed delivery pump (1) passes through the variable delivery pump (2) to a tank. When one or more of the valves (6,7,8) are open, the output of the variable delivery pump (2) will be regulated by load pressure. USE/ADVANTAGE - Relatively simple and cheap variable delivery pump.