According to different materials, hydraulic rotary seals must have the following performance characteristics:

1. The seals has certain mechanical and physical properties: such as tensile strength, constant elongation strength, and elongation;

2. The material structure of the seals has a certain degree of elasticity, the hardness is verified, and the compression permanent deformation is small;

3.3. The seals is compatible with the working medium, and it is not easy to swell, decompose and harden;

4. The seals must have the advantages of wear resistance and certain tear resistance;

5. With high temperature and low temperature aging performance;

What is hydraulic oil? What is the effect of hydraulic oil on the rotary seals?

Hydraulic oil is the use of hydraulic pressure in the hydraulic system as the power of the transmission medium, and plays the role of lubrication transmission, anti-corrosion, and anti-rust in the hydraulic system. For hydraulic oil, it should first meet the requirements of the hydraulic device on the liquid viscosity at the working temperature and the starting temperature. Since the viscosity change of the oil is directly related to the hydraulic action, transmission efficiency and transmission accuracy, the viscosity-temperature performance and the transmission accuracy of the oil are also required. Shear stability should meet the various needs raised by different uses. Therefore, the importance of hydraulic oil cannot be underestimated.

Compared with the advantages of the performance of the rotary seals, any kind of sealing material cannot have all the above characteristics. It is necessary to rotate the suitable seals material according to the working environment, temperature, pressure, medium and movement mode, and to meet the requirements by formulating the material formula. Certain requirements or use some auxiliary sealing tools to enhance the sealing, etc.

The formation of the sealing effect is through contact, and the factors that affect the effect of the rotary seals are the rotation of the sealing structure and the formation of the oil film, pressure, temperature, compatibility of materials, material, hardness, geometry, and surface of the working surface that the dynamic seal contacts. However, the compatibility between the hydraulic oil and the sealing material is very important. If there is a tiny dust particle in the hydraulic oil, it will cause the surface friction of the rotating seals, and the wear debris produced by the incompatibility with the hydraulic oil will make the rotating seal damaged and fails, and it also causes secondary pollution to the hydraulic oil and fails.