| 摘要 |
A hydraulic pump or motor of the type having a rotary cylinder barrel 11 rotatable within a body chamber 20, the barrel containing a plurality of circumferentially spaced pistons and having a cylinder port face containing a like plurality of circumferentially spaced cylinder ports 13, the cylinder port face bearing against a stationary port surface on a port block 10 containing circumferentially spaced inlet and delivery ports, characterised in that at least one passage 15, 19 is provided in each of the barrel and port block, each passage extending from the chamber to a region 21 radially inside the cylinder port face thereby permitting fluid to flow from the chamber to and from the region through the passages for cooling and flushing, at least the passage in the barrel communicating with the region closely adjacent the radially inner most edge of the cylinder port face. <IMAGE> |
