Different hydraulic pump station hydraulic system types

Types of common hydraulic pumps:

1. According to whether the flow rate can be adjusted, it can be divided into: variable pump and fixed displacement pump. The output flow can be adjusted according to needs is called a variable pump, and the flow can not be adjusted is called a fixed volume pump.

2. According to the common pump structure in the hydraulic system, it is divided into three types: gear pump, vane pump and plunger pump.

Gear pump: Smaller size, simpler structure, less strict requirements for oil cleanliness, and cheaper cost; however, the pump shaft is subject to unbalanced force, severe wear, and large leakage.

Vane pump: Divided into double acting vane pump and single acting vane pump. The pump has uniform flow, stable operation, low noise, higher operating pressure and volumetric efficiency than a gear pump, and a more complex structure than a gear pump.

Plunger pump: high volumetric efficiency, small leakage, can work under high pressure, mostly used in high-power hydraulic systems; but complex structure, high requirements for materials and processing accuracy, expensive construction, and high requirements for oil cleanliness.