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Hydraulic pump classification
Views: 925 Update Date: Dec 09 , 2017

1. According to whether the flow can be adjusted can be divided into: variable pump and quantitative pump. Output flow can be adjusted according to the needs of the variable pump, called the quantitative pump can not be adjusted.

2. According to the hydraulic system commonly used pump structure is divided into: gear pump, vane pump and plunger pump.

Gear pump: smaller, simple structure, less stringent requirements on the cleanliness of oil, the cheaper prices; but the pump shaft by the unbalanced force, serious wear and tear, leakage larger.

Vane pump: divided into double-acting vane pump and single-action vane pump. This pump flow uniform, smooth operation, low noise, pressure and volumetric efficiency than the gear pump, the structure is more complex than the gear pump.

Piston pump: high volumetric efficiency, small leakage, can work under high pressure, mostly for high-power hydraulic system; but the structure is complex, high requirements of materials and processing precision, the price is expensive, the oil cleanliness requirements.

Generally in the gear pump and vane pump can not meet the requirements of the piston pump. There are some other forms of hydraulic pumps, such as screw pumps, but not as universal as the above three pumps.

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