The plunger pump works mainly by changing the hydraulic pressure. The plunger reciprocates back and forth in the cylinder, which can change the volume of the sealed working chamber, so as to achieve the purpose of oil absorption and oil pressure. The suction valve and discharge valve of the plunger pump are all one-way valves. When the plunger is pulled out, the pressure in the working chamber is reduced, and the outlet valve is closed. When the pressure is lower than the inlet pressure, the inlet valve is opened and the liquid enters; when the plunger is pushed inward, it will work. When the chamber pressure rises, the inlet valve closes, and when it is higher than the outlet pressure, the outlet valve opens and the liquid is discharged.
When the drive shaft drives the cylinder to rotate, the swash plate pulls or pushes the plunger out of the cylinder to complete the oil suction and discharge process. The oil in the working chamber formed by the plunger and the cylinder hole is communicated with the suction and discharge chambers of the pump respectively through the oil distribution plate. The variable mechanism is used to change the inclination of the swashplate, and the displacement of the pump can be changed by adjusting the inclination of the swashplate. This is the basic working principle of the ceramic plunger pump.
2. The structure of the ceramic plunger pump
The structure of a ceramic piston pump is not complicated, it is divided into axial piston pump and radial piston pump. Among the two, the radial piston pump has a higher technical content, is a kind of high-efficiency pump, and will be the main application object of the piston pump in the future.
In addition, the maintenance of the plunger pump is also very important, and the maintenance can properly prolong the service life of the plunger pump. The swash plate axial piston pump generally adopts the form of rigid body rotation and end face distribution. The end face of the cylinder body is inlaid with a friction pair composed of a bimetallic plate and a steel oil distribution plate, and most of them adopt the method of plane distribution, so the maintenance is more convenient.
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