PNEUMOHYDRAULIC STATION Russian patent published in 1999 - IPC

FIELD: machine-tool industry; drives of hydraulically-operated actuating mechanisms of production equipment. SUBSTANCE: pneumohydraulic station includes two double-acting boosters 6, 13 each of which is provided with one additional pneumatic cavity 26, 49 and two control pneumatic cavities 4, 5, 11, 12 connected with pressure source and exhaust end through its own pneumatic distributor 2, 36; each control cavity of pneumatic distributors is connected to respective control cavity of other booster; pneumohydraulic station is also provided with pressure check valves and suction check valves. Hole 62, 63 made in center of each housing of booster 6, 13 is used for communicating the additional pneumatic cavity with atmosphere. Hydraulic cavities 14, 15, 41, 42 of boosters 6, 13 are located between pistons 29, 30, 52, 53 in sleeves 28, 51 rigidly secured on pistons for their motion relative to rod-piston 27, 50 immovably fixed on housing. Booster 6, 13 are additionally provided with two chambers 9, 10, 39,40 each with spring-loaded floating pistons 58, 59, 60, 61; one hydraulic cavity 18, 19, 45, 46 of these chambers is brought in communication with outlets of respective check valves 20, 21, 47, 48 made in form of damper of large section and with hydraulic cavities 14, 15, 41, 41 of boosters 6, 13 through suction check valves 16, 17, 43, 44 and passages 31, 32, 54, 55 in rod-piston 27, 59; other pneumatic cavity 7, 8, 37, 38 is brought in communication with respective pneumatic cavities 4, 5, 11, 12 of booster 6, 13; passages 31, 32, 54, 55 in rod-piston 27, 50 are brought out to opposite sides. Supply of one of boosters 13 having larger gain is effected from receiver 35 which is supplied from exhaust hole of pneumatic distributor 34 supplying other booster 6 having lesser gain from pneumatic main. EFFECT: reduced overall dimensions; saving of energy carrier; reduced noise. 1 dwg