The electric motor drives the hydraulic pump to suck oil from the oil tank, and the hydraulic pump converts the mechanical energy of the electric motor into the pressure energy of the liquid. Hydraulic medium through the pipeline through the throttle valve and reversing and valve into the left cavity of the hydraulic cylinder, pushing the piston to drive the table right, the hydraulic cylinder right cavity discharged hydraulic medium through the reversing valve flow back to the oil tank. After the reversing valve reversing hydraulic medium into the hydraulic cylinder right cavity, so that the piston left, pushing the table to move in the opposite direction. Change the opening of the throttle valve can adjust the speed of the hydraulic cylinder. The pressure of the hydraulic system can be adjusted through the relief valve. In the drawing of the hydraulic system diagram, in order to simplify the sake of the symbols are used to represent the hydraulic components, this symbol is called the function of the symbol.
