The hydraulic pump is the power component of the hydraulic system. It is driven by the engine or motor, sucks oil from the hydraulic oil tank, forms pressure oil discharge, and sends it to the actuator. According to the structure, the hydraulic pump is divided into gear pump, plunger pump, vane pump and screw pump. Types of common hydraulic pumps:
1. According to whether the flow can be adjusted, it can be divided into variable displacement pump and quantitative pump. The output flow that can be adjusted according to needs is called variable displacement pump, and the flow that cannot be adjusted is called quantitative pump.
2. According to the commonly used pump structure in the hydraulic system, it is divided into gear pump, vane pump and plunger pump.
Gear pump: small volume, simple structure, lax requirements for oil cleanliness and cheaper price; However, the pump shaft suffers from unbalanced force, serious wear and leakage.
Vane pump: it is divided into double acting vane pump and single acting vane pump. The pump has the advantages of uniform flow, stable operation, low noise, higher operating pressure and volumetric efficiency than gear pump, and more complex structure than gear pump.
Plunger pump: high volumetric efficiency, small leakage, can work under high pressure, mostly used in high-power hydraulic system; However, it has complex structure, high requirements for materials and processing accuracy, expensive price and high requirements for oil cleanliness.
Generally, the plunger pump is used when the gear pump and vane pump can not 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.
The hydraulic pump brands represented by our company include rexrorh, Parker, Yuken, yeoshe, Huade, berarama, etc.
