| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic rotary machine that can restrain a contact pressure between a valve plate and a cylinder block from becoming too high.SOLUTION: Hydraulic rotary machines 100, 200 comprises: a cylinder block 40 that is fixed to a rotating shaft 30 and has a plurality of cylinder bores 41; pistons 50 arranged slidably in cylinder bores 41 so as to define volume chambers 42; a swash plate 70 for reciprocating the pistons 50 so as to expand/contract the volume chambers 42; and a valve plate 80 that is in sliding contact with the cylinder block 40 and has a suction port 81 and a discharge port 82 communicating with the volume chambers 42. The valve plate 80 has a sliding contact surface 83 formed so as to protrude spherically with respect to the cylinder block 40, and the cylinder block 40 has a sliding contact surface 44 formed so as to be recessed depending on the shape of the sliding contact surface 83 of the valve plate 80. A minute clearance is formed at an outer edge position between the sliding contact surface 83 of the valve plate 80 and the sliding contact surface 44 of the cylinder block 40. |
