| 摘要 |
<p>Two or more radial piston hydraulic pumps (12, 13) disposed within a simple housing structure, where an input shaft (5) driving through bevel gearing (8, 9, 14) serves to transmit power to the cylinder barrels (12, 13) of the hydraulic pumps (15, 16). At least one cylinder barrel (12, 13) is mounted to rotate on each respective pintle valve (10, 11) each cylinder barrel (12, 13) having a radial cylinder bores (19) each housing a piston (40) operatively connected to a slipper (42) engaging a surrounding annular track ring (43, 44). The pintle valve (10, 11) is provided with a fluid intake duct (30) positioned centrally within the housing, and where the intake duct (30) is unobstructed by any rotating or fixed components of the pump. The intake duct (30) in the end of the pintle is large in size in order to reduce the velocity of the fluid entering the pump and thereby avoid cavitation erosion of the internal pump components. The pintle valves (10, 11) are supported at both ends within the housing so as to allow the pumps to operate under high pressure without problems of hydraulic forces tending to deflect the pintle valve members.</p> |
