ELECTROHYDRAULIC DRIVE Russian patent published in 2019 - IPC F15B9/17 F15B1/02 

FIELD: engines and pumps.

SUBSTANCE: drive comprises supply unit 1 of working medium supply with volume pump 2 having housing 19 and drive motor 30 with drive shaft 29 of pump 2, and group of connected to pump 2 hydraulic lines 3, 4 delivery and drain, respectively, steering drives 5…12 discrete angular displacement of actuators. Steering drives 5…12 includes rotary hydraulic engine 14 and distributor 13 connected to cavities of hydraulic motor 14 and to hydraulic lines 3, 4. Drive is equipped with volumetric pump 2 connected to suction and to draining line 4 of steering drives 5…12 retaining device 15. Device 15 comprises reservoir 17, hermetically separated by element 16 on chamber 37 with working medium and drive chamber 32, to which is connected source of hot gas under pressure, made in form of solid-fuel gas generator 35 and equipped with electrically igniting initiating pyrocartridge 36. Volumetric pump 2 of feed pump unit 1 is equipped with compensation-pressing device in form of hollow two-stage piston 21 and bellows 18, fixed on housing 19 of pump 2 to form cavity 20, connected to inner volume of housing 19. At the same time bellows 18 is rigidly fixed by one edge to housing 19, and by another – to hollow two-stage piston 21 installed on housing 19 with formation of differential cavity 31 connected to discharge of pump 2, and with possibility of translational movement of said piston 21 along section of surface of housing 19 pump 2, drive motor 30 of which is equipped with self-contained electric power source 34.

EFFECT: increased reliability, increased period of keeping of readiness for operation.

8 cl, 2 dwg