Types of hydraulic pumps

1.According to whether the flow can be adjusted, it can be divided into: variable pump and quantitative pump.

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

3.There are some other forms of hydraulic pumps, such as screw pumps, etc.

Definition of hydraulic pump: A machine that relies on the change of the closed working volume to realize the suction and pressure of liquid, thereby converting mechanical energy into hydraulic energy.

Types of commonly used hydraulic pumps:

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

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

Gear pump: Smaller in size, simpler in structure, less strict on oil cleanliness, and cheaper in price; but the pump shaft is subjected to unbalanced forces, causing serious wear and leakage.

Vane pump: divided into double-acting vane pump and single-acting vane pump. This kind of pump has uniform flow, stable operation, low noise, higher operating pressure and volumetric efficiency than gear pumps, and more complex structure than gear pumps.

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