The excavator hydraulic pump converts the mechanical energy of the prime mover into the pressure energy of the working fluid and provides the working fluid with a certain pressure and flow. It is the power source of the hydraulic system. Plunger pump is to achieve oil absorption and oil pressure by means of reciprocating movement of plunger in cylinder body to change the volume of sealing working chamber. Because the plunger and cylinder bore are cylindrical surfaces, they are easy to process, with high matching accuracy and good sealing performance. They are often made into high-pressure pumps. As long as the working stroke of the plunger is changed, the displacement of the pump can be changed, and it is easy to realize one-way or two-way variable.
Advantages: plunger pump has high pressure, compact structure, high efficiency and convenient flow regulation
Disadvantages: complex structure, high processing requirements and high price.
Plunger pumps are often used in hydraulic systems that require high pressure and large flow.
According to the arrangement direction of the plunger, the plunger pump is divided into axial plunger pump and radial plunger pump.
Axial piston pump is divided into swash plate type and inclined shaft type according to its structural characteristics.
