HYDRAULIC CONTROL DEVICE Russian patent published in 2014 - IPC F15B13/07 F04B1/26 

FIELD: machine building.

SUBSTANCE: proposed device is designed to control axial piston hydraulic machine control member. It consists of control roll, hydraulic cylinders, pump adjusting member, mechanical feedback, flat two-slides throttling pressure control valve composed by two rotary slides fitted on one axle between lower distribution bed and upper support plate. Note here that first slide is articulated with control roll lever while second slide is articulated with hydraulic control cylinder via feedback lever. Hydraulic pressure control valve slides have working fluid control, feed and discharge openings and hydrostatic chambers. Control and feedback levers are arranged in symmetry along cylinder block inclination lengthwise axis at neutral position of the pump adjusting member. Lengths of their arms are selected to satisfy the equality of turn angles of the first and second slides at control roll turn. First slide is communicated via differential reducer to high-torque motor.

EFFECT: decreased quantity of mechanical and hydraulic elements, lower costs, higher reliability.

5 cl, 5 dwg