What are the main performances of hydraulic electric pumps

Release time:

2023-08-29

Viscosity is the first factor to consider when selecting hydraulic oil. Under the same working pressure, if the viscosity is too high, the movement resistance of hydraulic components will increase, and the self-priming capacity of the hydraulic pump will decrease as the temperature rises faster, and the pressure drop and power loss of the pipeline will increase; If it is low, it will increase the volume loss of the hydraulic pump, increase the internal leakage of the components, thin the oil film of the sliding parts, and reduce the supporting capacity.

1. Appropriate viscosity, good viscosity-temperature characteristics

Viscosity is the first factor to consider when selecting hydraulic oil. Under the same working pressure, if the viscosity is too high, the movement resistance of hydraulic components will increase, and the self-priming capacity of the hydraulic pump will decrease as the temperature rises faster, and the pressure drop and power loss of the pipeline will increase; If it is low, it will increase the volume loss of the hydraulic pump, increase the internal leakage of the components, thin the oil film of the sliding parts, and reduce the supporting capacity.

2. Good lubricity (wear resistance)

Hydraulic electric pumps have a large number of moving parts that need to be lubricated to prevent wear on relative moving surfaces, especially for systems with high pressure, which require much higher anti-wear properties of hydraulic oil.

3. Good oxidation resistance

The hydraulic electric pump will also be oxidized during use. The acidic substances produced after the oxidation of the hydraulic oil will increase the corrosion of the metal, and the sludge deposits will block the filter and the small gaps, making the hydraulic system work abnormally. Therefore, it is required Has good oxidation resistance.

4. Good shear stability

When the hydraulic oil passes through the pump, the throttle port and the gap of the valve, it is subjected to severe shearing, which causes the molecules of some macromolecular polymers in the oil, such as tackifiers, to break and become small molecules, reducing the viscosity. If it is reduced to a certain extent, the oil cannot be used, so it is required to have good shear resistance.

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