Working principle of YUKEN plunger pump

Plunger pump is a kind of reciprocating pump, belonging to volumetric pump. Its plunger is driven by eccentric rotation of pump shaft, reciprocating, and its suction and discharge valves are one-way valves. When the column plug is pulled out, the pressure in the working chamber decreases, and the outlet valve is closed; when the pressure is lower than the inlet pressure, the inlet valve is opened, and liquid enters; When the plunger is pushed in, the working chamber pressure rises, and the inlet valve is closed. When the pressure is higher than the outlet pressure, the outlet valve is opened, and the liquid is discharged.

The axial piston pump with slipper structure is the most widely used axial piston pump at present. The plunger placed in the cylinder block contacts the swashplate through the slipper. When the transmission shaft drives the cylinder block to rotate, the swashplate pulls or pushes the plunger out of the cylinder block to complete the oil suction and drainage process. The oil in the working volume cavity composed of the plunger and the cylinder hole is respectively communicated with the oil suction and discharge cavities of the pump through the oil distribution plate. The variable mechanism is used to change the inclination of the swashplate. The displacement of the pump can be changed by adjusting the inclination of the swashplate.