FIELD: power engineering. SUBSTANCE: proposed hydraulic drive is designed for maintaining constant speed of emergency power supply source. Hydraulic drive contains hydraulic motor and generator installed on shaft, shaft speed governor and hydraulic supply source. It is furnished additionally with device to control and regulate parameters of hydraulic drive-generator by revolutions, including electrohydraulic slave mechanism, command device and control unit whose input is connected to output of generator, and output, through command device, to electric input of slave mechanism whose hydraulic input is connected to pressure line of hydraulic supply source, and output, to shaft speed governor. EFFECT: improved reliability of hydraulic drive. 4 cl, 1 dwg
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