DOUBLE-ACTING TRANSLATIONAL MOTION HYDRAULIC DRIVE Russian patent published in 2003 - IPC

FIELD: hydraulic drives designed for provision of translational motion of group of double-acting hydraulic prime movers. SUBSTANCE: hydraulic drive includes stages in form of two double-cavity hydraulic prime movers, each with unlike and different in volumes cavities, and which are rigidly connected between each other and communicated by link connecting inlets to one of hydraulic prime movers over nonclosed contour through controlled hydraulic control valve with pressure line. In this case, unlike cavities from different in volumes cavities of hydraulic prime movers are connected in pairs by hydraulic link with formation of cavities in form of communicating volumes with possible connection of each cavity to pressure or drain line and with simultaneous provision of maximum and minimum values of columns of like cavities from cavities different in volumes of hydraulic prime movers in extreme positions of hydrau7lic drive. The latter has two throttled, each provided with check valve which are installed in antiphase in direction of throttling or free passage of fluid countercurrents from different hydraulic prime movers, in said link on pressure hydraulic line between inlets to one of hydraulic prime movers. EFFECT: provided independent control of speed of each hydraulic prime mover. 3 cl, 3 dwg