| 摘要 |
1,131,386. Reciprocating pumps and motors. J.F.F.M.R. LANDREAU. July 3, 1967 [July 25, 1966], No.30491/67. Heading F1A. In a pump or motor having a plurality of cylinders 13 arranged radially about a crank-shaft 1 and mounted for oscillation in side plates 3, 4 by means of trunnions 14, 15, seals 18 are arranged between each trunnion and the respective side plate on either side of a cylinder inlet or exhaust port formed in the trunnion. A positioning ring 19 is provided between one of the seals 18 and the free end of the respective trunnion. The flow fluid into each cylinder 13 through the cylinder passage 43 and out of the cylinder through passage 44 is controlled by cylinder oscillation, an inlet port (39), Fig. 3 (not shown) in the trunnion 14 registering with a respective inlet duct 35 in the side plate 3 and an outlet port in the trunnion 15 registering with a respective exhaust duct 37 in the side plate 4. The pistons 8 are provided with bearing shells 20, e.g. of bronze, and a ring 23, which may be secured to one of the pistons, is mounted in grooves 22 in the bearing shells. Trunnion passages 40 provide for the escape of leakage. |
