CONTROL MECHANISM OF WORKING-VOLUME OF DOUBLE-FLOW AXIAL-PISTON HYDRAULIC MACHINE Russian patent published in 1998 - IPC

FIELD: hydraulic drives, applicable in control mechanisms of working volume of double-flow axial-piston hydraulic machine with independent pumping units. SUBSTANCE: the mechanism has two governors, differential piston kinematically linked with the pumping unit and communicating with its discharge line through a hydraulic line, spring-loaded double-arm lever, distributing control valve installed in transverse opening of the differential piston and engageable with one of the arms of the control piston lever engageable with the other arm of the lever, installed in the working chamber connected to the control line. It is furnished with a pressure averager connected to the discharge lines of hydraulic machines, and two power governors, the actuator of each governor is connected to the respective control line. The control elements are connected to each other and to the outlet of the pressure averager through hydraulic lines. Besides, it may be furnished with two shut-off valves, each connected to the control line. Control cavities of the shut-off valves are connected to the respective discharge lines. It may also be furnished with an additional control line connected to one of the shut-off valves. EFFECT: improved design. 3 cl, 1 dwg