INTERNAL GEAR DEVICE WITH ROTARY VALVE INTERNAL GEAR DEVICE WITH ROTARY VALVE

摘要

A gerotor device has a body (10) that includes high pressure ports (20) communicating with an inlet (12) and low pressure ports (22) communicating with an outlet (14). An inner member (42) and an outer member (40) co-operate to define pressure chambers (52) that increase the decrease in volume as the member (42) orbits and rotates. A rotary valve (62) selectively connects pressure chambers (52) to pressure ports (20) and (22) to convert between mechanical torque and fluid pressure. Cavities (75) and (77) are provided adjacent the rotary valve (62) hydraulically to balance the valve.