The working principle of plunger pump

The plunger pump is an important piece of equipment for the hydraulic system. Relying on the reciprocating movement of the plunger in the cylinder, the volume of the sealing chamber will be changed to achieve oil absorption and pressure oil. Plunger pumps have the advantages of high rated pressure, compact structure, high efficiency, and convenient flow adjustment. They are widely used in hydraulic presses, engineering machinery, ships, and other high pressure, large flow, and large flow adjustment occasions.

A plunger pump is a kind of reciprocating pump, which belongs to a volumetric pump. Its plunger is driven by the eccentric rotation of the pump shaft to move back and forth, and its valve and valve are both check valves. When the plunger is pulled out, the pressure in the working chamber decreases, and the outlet valve closes. When the pressure is lower than the inlet pressure, the inlet valve opens and the liquid enters; when the plunger is pushed in, the working chamber pressure rises and the inlet valve closes. When the pressure is higher than the outlet pressure, The outlet valve opens and the liquid is discharged. When the drive shaft drives the cylinder block to rotate, the swash plate pulls or pushes the plunger from the cylinder block to complete the oil absorption and discharge process. The working cavity hole of the cylinder plunger passes through the fluid composed of the valve plate and is respectively communicated with the suction pump and the oil discharge chamber. Variables are used to change the inclination angle of the swashplate, and the pump displacement can be changed by adjusting the inclination angle of the swashplate.

Plunger pump structure

Piston pumps are divided into two typical structural forms: axial piston pumps and radial piston pumps. Since radial piston pumps are a new type of high-efficiency pump with high technology content, radial piston pumps can be used as a piston pump. An important part of the field, it has a rapid acceleration effect.