Features of hydraulic jacks

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Features of hydraulic jacks

1. Proper viscosity, good viscosity-temperature characteristics-hydraulic jack
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, the temperature will increase and the self-priming capacity of the hydraulic pump will decrease, and the pipeline pressure drop and power loss will increase; if the viscosity is too high If it is low, it will increase the volume loss of the hydraulic pump, increase the leakage in the components, and make the oil film of the sliding parts thinner, and the supporting capacity will decrease.
2. Good anti-emulsification and hydrolytic stability-hydraulic jack
The water and condensate mixed in the hydraulic oil from different ways in the working process are affected by the hydraulic pump and other components.
3. Good rust and corrosion resistance-hydraulic jack
Hydraulic oil will inevitably come into contact with moisture and air during use, as well as acidic substances produced after oxidation, which will rust and corrode the metal and affect the normal operation of the hydraulic system.

4. Good oxidation resistance-hydraulic jack
The hydraulic oil is also oxidized during use. The acidic substances generated after the hydraulic oil is oxidized will increase the corrosiveness of metals, and the sludge deposits produced will block the filter and small gaps, making the hydraulic system work abnormally, so it is required to have Good oxidation resistance.
5. Adaptability to sealing material-hydraulic jack
Due to the poor adaptability of the hydraulic oil and the sealing material, the hydraulic jack will cause the sealing material to expand, soften or harden and lose its sealing performance. Therefore, the hydraulic oil and the sealing material are required to be compatible with each other.
6. Good lubricity (wear resistance)-hydraulic jack
The hydraulic system has a large number of moving parts that need to be lubricated to prevent the wear of the relative moving surface, especially the higher pressure system, the anti-wear performance of the hydraulic oil is much higher.
7. Good shear stability-hydraulic jack
As the hydraulic oil passes through the pump, valve orifices and gaps, it has to undergo violent shearing, causing some macromolecular polymers in the oil, such as tackifier molecules, to break and become small molecules, which reduces the viscosity. The oil can no longer be used if it is reduced to a certain level, so it is required to have good shear resistance.
8. Good foam resistance and air release-hydraulic jack
In the hydraulic oil tank, because the air bubbles mixed in the oil circulate with the oil, it will not only reduce the pressure of the system and deteriorate the lubrication conditions, but also produce abnormal noise and vibration. In addition, the air bubbles increase the contact area between the oil and the air and accelerate Because of the oxidation of the oil, hydraulic oil is required to have good anti-foaming and air release properties.