ADJUSTABLE DIAPHRAGM PUMP UNIT Russian patent published in 2012 - IPC F04B9/08 

FIELD: engines and pumps.

SUBSTANCE: unit includes vertically installed power hydraulic cylinder with a piston, which is rigidly connected to a stock, working hydraulic cylinder, valve block - suction and delivery, and adjustable hydraulic pump having hydraulic lines one of which is interconnected with hydraulic distributor through a check valve, and located in the housing. The other line is connected to working fluid tanks. Primary power source is connected to inlet shaft of hydraulic pump. Control unit with controller is connected to end transmitters and hydraulic distributor. In addition, unit is provided with a leak-proof chamber with a cover plate, in the upper part of which there installed is an elastomeric diaphragm made in the form of a hose of self-reversing type with closed lower end, or in the form of a membrane or bellows, which divide the chamber into two leak-proof cavities. Cavity above the diaphragm, which has smaller volume, is interconnected with lower end of working hydraulic cylinder filled with liquid industrial oil. Lower cavity under diaphragm is interconnected with valve block. Working hydraulic cylinder is equipped with a piston hinged to piston stock of power hydraulic cylinder.

EFFECT: lower metal consumption and simpler design, durability and reliable operation is provided.

3 cl, 1 dwg