FIELD: machine building.
SUBSTANCE: invention refers to hydraulic automation and hydraulic drive and can be used for example in control systems of objects with high dynamic properties at action of electromagnetic interference and increased radiation on them and operation at explosion-hazardous premises. Drive includes control electrohydraulic drive, power hydraulic drive with a spool valve, which is mechanically connected to stock of control electrohydraulic drive, electric displacement transducer installed on stock of power hydraulic cylinder and electronic amplifier. Output of electronic amplifier is connected to input of summing electronic amplifier the output of which is connected to control winding of electrohydraulic amplifier, device with two bellows installed on mechanical movable part of electrohydraulic amplifier of control electrohydraulic drive. Transducer for conversion of movement of stock of control electrohydraulic drive to pneumatic pressure signal is installed on stock of control electrohydraulic drive and has two throttles, two nozzles, elastic stiff plate connected by means of a rod to stock of control electrohydraulic drive. Output of transducer is connected to input of fluid amplifier; transducer for conversion of movement of power hydraulic cylinder stock to pneumatic pressure signal is installed on stock of power hydraulic cylinder and includes two throttles, two nozzles, stiff elastic plate connected through a rod to stock of power hydraulic cylinder. Output of transducer is connected to input of fluid amplifier, which is connected to summing fluid power amplifier. Valve actuating the fluid control channel, in case of electric power failure or at the operator's request, connects the bellows to outputs of summing fluid power amplifier. Control electrohydraulic drive includes hydraulic cylinder with stock.
EFFECT: higher dynamic accuracy of drive at high load capacity and functioning of the drive at action of electronic interference.
1 dwg
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