MOBILE MACHINE HYDRAULIC POWER SUPPLY UNIT Russian patent published in 2006 - IPC F15B11/16 

FIELD: hydraulic systems of mobile machines.

SUBSTANCE: proposed mobile machine hydraulic power supply unit includes variable-capacity pump whose pressure manifold communicates with pressure pipeline to deliver working liquid to hydraulic motors of machine actuators, and drain pipeline. Cylinder is provided to change delivery of pump which is mechanically coupled with pumping unit of pump and is made in form of stepped piston whose smaller working space is hydraulically connected with pressure pipeline. Control of pump is effected by auxiliary supply unit, pressure level control unit, pusher with working chamber and control three-line spool mechanically coupled with pusher.

EFFECT: provision of effective and reliable operation of several consumers at different pressure, speed or power control modes in single-pump hydraulic systems.

4 cl, 1 dwg