Precautions for the application of hydraulic seals in hydraulic systems

If the hydraulic cylinder is not well sealed, it will cause serious internal and external leakage, so that the force and working speed cannot meet the design requirements, the power loss will increase, the efficiency will be reduced, the environment will be polluted, the oil will be wasted, and even fire will be caused. Therefore, seals are very important in hydraulic systems. Seals can be used to prevent oil leakage and external gas, dust, etc. from entering the hydraulic system. Of course, it is impossible for the hydraulic cylinder to be absolutely sealed. Because of the reciprocating motion of the piston rod, the oil is always brought out. However, this leakage is required to be as small as possible. On the contrary, if the piston rod is reciprocating, it will not bring out the slightest oil, so that the piston rod is in dry friction, which will affect the working life and performance of the hydraulic cylinder.

Hydraulic seals are the core of hydraulic equipment and the guarantee for the normal operation of hydraulic equipment. First of all, we must understand the environmental conditions such as the working performance, working pressure, working oil temperature, working medium hydraulic oil and moving speed of the hydraulic equipment in the factory. The sealing characteristics, structural forms, and performance of sealing materials of hydraulic seals. Ensure the design and manufacture quality of seals, sealing surfaces, sealing grooves and the assembly quality of seals, reduce hydraulic oil pollution and enhance protection awareness, strengthen the supervision and inspection of hydraulic oil pollution, and replace hydraulic oil pollution in time. Good storage and safekeeping of hydraulic seals, etc. Based on this, a comprehensive analysis and comparison are carried out, and common hydraulic seals with suitable structural forms and suitable materials are selected from them. Installation of hydraulic seals: 1. Check the relevant surfaces of the piston, cylinder barrel and installation guide sleeve, and make sure that the package is clean, free of edges and burrs. 2. The installation tool is required to be smooth, without edges and sharp corners, to ensure that the seal will not be damaged in any form during the installation process. Installed, but no grease is allowed to remain between the sliding seal ring and the rubber elastomer, otherwise it will affect the sealing performance. 4. Whether it is vertical or horizontal installation, the coaxiality of the piston and the cylinder should be maintained. Excessive eccentricity may damage the seal. 5. The installation speed should not be too fast, otherwise the seal will be damaged. Storage and storage of hydraulic seals: When storing and storing hydraulic seals, the hydraulic seals should be placed in a sealed moisture-proof plastic bag such as PTFE, and the storage date should be recorded, and then stored in a dark place to avoid. Improper storage and storage such as high temperature or direct sunlight will reduce its sealing performance.