Zhanpeng液压-a11v（l）o可变位移活塞泵

When the pull rod moves downward, it pushes the servo piston to move down. , the upper valve port of the servo valve is opened, and the pressure oil in the lower chamber of the variable housing enters the upper chamber of the variable housing through the oil passage in the variable piston. Since the area of the upper chamber is larger than that of the lower chamber, the hydraulic pressure pushes the piston to move downward, driving the pin The shaft rotates the variable head around the center of the steel ball, changes the inclination angle of the variable head (increases), and the flow rate of the plunger pump increases accordingly. On the contrary, when the rod moves upward, the inclination angle of the variable head changes in the opposite direction, and the flow rate of the pump changes accordingly.