Types of hydraulic pumps commonly used
- Gear pump: the volume is small, the structure is simple, to the oil cleanliness requirement is not strict, the price is cheaper;But the pump shaft by the unbalanced force, wear serious, large leakage.
- Plunger pump: high volume efficiency, small leakage, can work under high pressure, mostly used in high-power hydraulic system;But the structure is complex, the material and the processing precision request is high, the price is expensive, to the oil cleanliness request is high.
- Blade pump: divided into double-acting blade pump and single-acting blade pump.This pump flow uniformity, smooth operation, low noise, pressure and volume efficiency than gear pump high, complex structure than gear pump.
1.Hydraulic pump pressure
Rated pressure refers to the maximum pressure that can operate continuously according to the test standard under normal working conditions.Its size is limited by the life, if the rated pressure work, pump (or motor) service life will be shorter than the design life.Overload is when the working pressure is greater than the rated pressure
3. Displacement and flow rate