AXIAL PISTON TYPE LIQUID PRESSURE ROTARY MACHINE

摘要

PROBLEM TO BE SOLVED: To provide an axial piston type liquid pressure rotary machine which achieves good lubricity of a valve plate cylinder block.;SOLUTION: In an axial piston type liquid pressure rotary machine, a seal surface 4c of a valve plate 4 faces a seal surface of a cylinder block to form a hydrostatic bearing. A shallow groove 20 is provided on the seal surface 4c. The shallow groove 20 is provided over a circumferential direction of the seal surface 4c of the valve plate 4 so as to connect a port 4a with a port 4b.;SELECTED DRAWING: Figure 4;COPYRIGHT: (C)2016,JPO&INPIT