VARIABLE DISPLACEMENT PUMP REGULATOR

摘要

This regulator (10) is provided with a feedback lever (24) which moves a compensator sleeve (32) in the axial direction of a compensator spool (30). The compensator spool (30) and the compensator sleeve (32) form an autogenous pressure introducing chamber (34), into which the autogenous pressure (Pd) of a pump is introduced, and a pressure adjusting unit (51), which outputs a control pressure (Pcl) from the autogenous pressure introducing chamber (34) to a large-diameter pressure receiving part (22) of a servo piston (21). Inside of the compensator sleeve (32), a step portion (42) is provided where a pressure acts in the direction a control spring (31) biases the compensator spool (30) by means of the autogenous pressure (Pd) introduced into the autogenous pressure introducing chamber (34).