The structure principle of the valve block of the electro-hydraulic thruster is mainly composed of the principle of the hydraulic system and the structure of the valve block. The valve block is composed of two overlapping sets of valve block structures. If one group is oil intake, then the other group is the return Oil, on the contrary, is the same.
When the oil is in, the oil suction check valve of the electric hydraulic pusher is closed, and the oil opens the check valve. At the same time, the high pressure oil passes through the control port to throttle the control chamber of the check valve, because the pressure area of the control chamber is more than the valve The large positive pressure area of the core makes the valve port in a closed state, forcing oil into the hydraulic cylinder.
When oil is sucked, the oil suction check valve of the electric hydraulic pusher opens, the check valve closes, and the control chamber of the throttle check valve loses pressure. Therefore, the oil return of the hydraulic cylinder is realized after the throttle check valve opens. The flow (speed) is adjusted by the adjusting screw of the throttle check valve, and the power (pressure) is adjusted by the adjusting screw of the overflow valve.
The AC motor of the electric hydraulic pusher drives the bidirectional gear pump to work through the coupling, and the high pressure oil output from the gear pump enters the hydraulic cylinder to work through the pin. The forward and reverse rotation of the motor realizes the reciprocating movement of the piston rod of the hydraulic cylinder. All hydraulic parts work in a closed steel cylinder oil tank, so the oil suction and oil return of the hydraulic system can be carried out directly in the tank.
