PNEUMOHYDRAULIC STATION Russian patent published in 1997 - IPC

FIELD: machine-tool industry; hydraulic actuating mechanisms of production equipment. SUBSTANCE: pneumohydraulic station includes two double-acting boosters each; each booster is provided with one additional pneumatic chamber and two control pneumatic chambers brought in communication with pressure source and with exhaust line through its two-position pneumatic distributor; each chamber of pneumatic distributor is connected to respective control chamber of other booster; station is also provided with delivery check valves and suction check valves. In center of each housing there is hole for communicating the additional chamber with atmosphere. Hydraulic chambers of boosters are located between pistons of each booster in sleeve rigidly secured on pistons for motion relative to rod-piston secured on housing. Boosters are provided with two coaxial additional chambers each has spring-loaded floating pistons; hydraulic chamber is brought in communication with outlets of respective check valves made in the form of damper of large section and with hydraulic chambers of boosters through additional check valves and passages in rods; pneumatic chamber is brought in communication with respective pneumatic chambers of boosters; passages in rods are brought out to opposite side of pistons. EFFECT: enhanced reliability. 1 dwg