| 摘要 |
1,184,544. Hydraulic reciprocating motors. MOLINS MACHINE CO. Ltd. May 3, 1967 [May 6, 1966], No.20186/66. Heading F1A. In a hydraulic servomotor system comprising a radial ball piston motor, Fig. 3, controlled by a slide valve 1, Fig. 1, a hydrostatic bearing is formed between the rotating cylinder block 103 of the motor and the stationary pintle valve 115 by grooves 118, 119, 120, 121 in the pintle valve, which are connected to the high-pressure liquid supply line 15 of the motor upstream of the control valve 1. The motor ball pistons 104 engage an eccentric groove 102 in the motor casing, drive being transmitted through a shaft 107 on the cylinder block. Vent holes 105, 106 are formed in the cylinder block, holes 105 registering with grooves 122, 123 in the pintle. Distributing ports 124, (125, Fig. 4, not shown), in the pintle communicate via connections 112, 114 with ports 3 and 5 in control valve 1, Fig. 1. Movement of control valve spool 16 in either direction causes corresponding movement of the motor output shaft, downward movement of the valve spool acting to reduce the pressure at port 3 and increase the pressure at port 5 from the supply pressure at port 4. Exhaust liquid from the motor passes through valve port 2 when the valve spool is moved downwardly, and port 6 when moved upwardly. Hydrostatic bearing grooves 118, 119, 120, 121 comprise three segmental portions on either side of distributing ports 124, (125), each portion being connected through a passage in the pintle to connection 113 and highpressure line 15. The motor casing is vented through connection 111. |
