What are the types of hydraulic pumps?
Jan 15,2024
1, according to whether the flow can be adjusted can be divided into: variable pump and quantitative pump. The output flow can be adjusted according to the needs of the variable pump, the flow can not be adjusted called quantitative pump.
2. According to the commonly used pump structure in hydraulic system, it is divided into 3 kinds: gear pump, vane pump and plunger pump.
Gear pump: small size, simple structure, lax requirements for oil cleanliness, and cheaper price; but the pump shaft is subject to unbalanced force, serious wear and large leakage.
Vane pump: divided into double acting vane pump and single acting vane pump. This pump has uniform flow, stable operation, low noise, higher pressure and volumetric efficiency than gear pumps, and more complicated structure than gear pumps.
Plunger pump: high volumetric efficiency, small leakage, can work under high pressure, mostly used in high-power hydraulic systems; but the structure is complex, the material and processing accuracy requirements are high, the price is expensive, and the oil cleanliness requirements are high.
Generally, the piston pump is used when the gear pump and the vane pump cannot meet the requirements. There are some other forms of hydraulic pumps, such as screw pumps, but the application is not as common as the above three.
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