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

FIELD: control of working volume of axial-piston hydraulic machines. SUBSTANCE: the mechanism has two governors, each of them is made in the form of a differential piston linked with one of the pumping units, 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 and installed in the working chamber communicating with the control line. In addition, each governor is furnished with a spring- loaded lever, throttle slide valve engageable with the additional lever and communicating with the control line, drainage and control piston working chamber, pressure pickup acting on the lever in the direction opposite the spring action and connected to the discharge line of the pumping unit providing for movement of the pressure pickup along the lever, spring-loaded plunger with a working cavity connected to the control piston working chamber, as well as a booster acting on the lever through a flexible member in the direction opposite the spring action and connected to the discharge line of the other pumping unit. EFFECT: improved design. 1 dwg