| 摘要 |
<p>A fluid pressure energy translating device (10) of the sliding vane type comprising a cam ring (13) including an internal contour (30), a rotor (25) having a plurality of vanes (36) rotatable therewith and slidable relative thereto in slots in the rotor (25) with one end of each vane (36) engaging the internal contour (30). The rotor (25) and internal contour (30) cooperate to define one or more pumping chambers (31, 32) between the periphery of the rotor and the cam contour through which the vanes (36) pass carrying fluid from an inlet port (19) to an outlet port (22). At least one cheek plate (16, 17) is associated with the body (11) and rotor (25). Two pressure chambers (39, 40) are formed for each vane (36) and each vane has two piston surfaces, one in each chamber, both being effective under pressure in the respective chambers (39, 40) to urge the vanes into engagement with the cam (13). A generally annular internal feed passage (44) is formed entirely within the rotor (25) and communicates with one set (39) of the pressure chambers. A radial passage (41) is provided on each vane (36) extending from the tip of the base thereof, so that cyclically changing pressure is supplied to the other set (40) of chambers. Arcuate grooves (49a, b) are provided in the face of the cheek plate (16, 17) in the dwell zones, and a hydrostatic pressure pad (48) is associated with the opposite face of the cheek plate (16, 17) and circumscribes the arcuate grooves (49a, b). An opening (50) extends from the arcuate grooves (49a, b) through the cheek plate (16,17) to the hydrostatic area (48).</p> |
