POSITION PNEUMOHYDRAULIC DRIVE Russian patent published in 1997 - IPC

FIELD: pneumohydraulic automation. SUBSTANCE: drive has actuating pneumatic cylinder whose rod is rigidly connected with rod of braking hydraulic cylinder and adjustable throttle device which has housing with supply and discharge passages connected to chambers of hydraulic cylinder and throttling member made in the form of cylindrical core rigidly secured on end of housing. Housing has inner threaded hole receiving the threaded bush embracing the above-mentioned cylindrical core bush is mounted for motion under action of electromagnetic winding embracing the housing; this winding is connected to control system which includes speed sensor and pneumatic cylinder rod position sensor, follow-up monitoring unit, program storage unit and electromagnetic winding voltage control unit. Control unit is provided with accelerometer and meter of derivative of generalized coordinate of pneumatic cylinder rod. EFFECT: enhanced efficiency. 3 cl, 2 dwg