QUICK-OPERATING ELECTROHYDRAULIC AMPLIFIER Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: plunger of the gate valve with the discharge and drain chambers is rigidly connected with a movable coil mounted in the housing on the resilient members for forward displacement in the ring-shaped gap of the magnetic circuit of the electromechanical transducer. The terminals of the coil winding are switched on to the flexible buses of the transducer. The coil has hollow conducting adapters. The winding is made as at least two parts of the conducting capillary tube. The gate valve plunger has two inner channels. One of them is connected with the discharge chamber, the other one with the drain chamber of the gate valve. The adapter cavities are connected one after another by parts of the capillary tube. Each cavity is switched on by turns to one of the inner channels of the plunger. The winding terminals are made together with extreme adapters. The flexible buses are made as U-shaped conducting plates. EFFECT: enhanced control of the hydraulic servo drive. 1 cl, 2 dwg