FEED CONTROLLER FOR AXIAL PISTON HYDRAULIC MACHINE Russian patent published in 1995 - IPC

FIELD: hydraulic engineering. SUBSTANCE: differential piston having the lateral bore is mounted inside the housing to define under-piston space and above-piston space. A movable sleeve kinematically connected with a controlled link is received in the bore. The sleeve has inner ring groove coupled with the above-piston space of the housing. The spring-loaded differential plunger is mounted inside the sleeve to define a control chamber connected with the high-pressure line through the under- piston space. The plunger is mounted for permitting overlapping the groove of the sleeve and interacting with one of the arms of the rotatable double-arm lever mounted on the axle of rocking inside the housing. The other arm of the lever bears on the spring-loaded pusher. The three-linear slide distributor is provided with the return spring and two control chambers. The control chamber of the spring-loaded booster, which bears on the arm of the lever toward the pusher, is connected with the one of the distributing lines. The other lines are connected with the high-pressure and low-pressure lines. One control chamber is connected with the high-pressure line and the other one is connected with the control pressure source. Both chambers are mounted from the side which is opposite to the return spring of the distributor. EFFECT: improved accuracy of controlling. 2 cl, 2 dwg