| 摘要 |
<p>PURPOSE:To enable capacity control by a simple structure by providing a sliding type switching valve that is driven by a control piston, on one fluid supply route of a cylinder group, and by providing a rotary valve driven in the same way, on the other fluid supply route. CONSTITUTION:A central cylinder block 2 comprises cylinder blocks 2a, 2b in the front side and the rear side respectively, and double-headed pistons 30a... are inserted into each pair of cylinders 12a... and 13a... that are formed on the cylinder blocks 2a, 2b so that the pistons are freely slid and reciprocated. Each piston 30a is reciprocated by the rotational oscillation of a swash plate 27, while a fluid is taken in from the both sides, and is compressed. A sliding type poppet valve 57 is provided on a suction passage 37 in the front side, while a cylindrical rotary valve 41 is provided on a suction port 47a to the rear side, by which a fluid is supplied when a slit-shape suction port 48 is superimposed on the port 47a. The operation of the valves 57, 41 is controlled by a control piston 50 corresponding to the pressure of a control pressure chamber 51.</p> |
