HYDRAULIC DRIVE WITH THROTTLING CONTROL Russian patent published in 2020 - IPC F15B11/05 

FIELD: machine building.

SUBSTANCE: application field: hydraulic drives of machines and units operating with variable in magnitude and direction load at output link of hydraulic motor. Hydraulic drive includes hydraulic double-acting hydraulic engine 1, hydraulic power supply 2 with pressure 3 and drain 4 hydraulic lines, four-line throttling hydraulic distributor 5 with proportional electric control, electronic control unit 6 of which is connected to control system 7 of hydraulic drive, valve 8 of constant pressure difference, inlet channel and spring control cavity of which are connected to drain channel of hydraulic distributor 5, outlet channel – with drain hydraulic line 4, and control cavity opposite to spring cavity with channel T of switching device 9, and valve 10 ratio between pressure difference in inlet and outlet channels of said valve and pressure difference in inlet and outlet channels of valve 8. Inlet channel of valve 10 is connected to the pressure hydraulic line 3, and the outlet channel – to the pressure channel of the hydraulic control valve 5. Switching hydraulic device 9 is made in the form of a four-line three-position hydraulic distributor, the control electrodes YA1 and YA2 of which are connected to the hydraulic drive control system 7.

EFFECT: higher rigidity coefficient of hydraulic drive.

1 cl, 1 dwg