AXIAL-PLUNGER HYDRAULIC PUMP Russian patent published in 1999 - IPC

FIELD: hydraulic engineering; handling aggressive liquids and liquids with poor lubricating properties. SUBSTANCE: axial-plunger hydraulic pump has fixed cylinder block with plunger and drive shaft with inclined disk. Inclined disk interacts through solids of revolution with intermediate disk. Center of spherical support of intermediate disk does not coincide with plane passing through geometric centers of plunger spherical heads arranged in intermediate disk in radial holes provided with longitudinal slots preventing falling out of plunger heads arranged eccentrically relative to their axes. Radial stop is fixed on cylindrical surface of intermediate disk to prevent its turning. Radial stop is made in form of axle with spherical member of rotation getting into slot of pump housing plug. Six diameter slots are made on outer surface of plunger in zone of getting of distribution unit channels into cylinders. Two of slots open into cylinder working spaces and four blind slots are connected in pairs by radial holes. Sealing grooves are made on outer surface of plunger to separate working spaces of cylinders and drive shaft space into which liquid is filled to preset level for lubricating friction units. With pump operating, spherical member of revolution of intermediate disk executes vibratory motion in slot of pump housing plug preventing turning of intermediate disk relative to pump housing. EFFECT: enhanced dynamic characteristics and increased service life of pump. 13 cl