In the hydraulic system and its system, the sealing device is used to prevent the leakage of working medium and the intrusion of external dust and foreign objects. The element that plays a role in sealing is the seal.
Leakage will cause a waste of working medium, pollute the machine and the environment, and even cause malfunction of the machine operation and personal accident of the equipment.
Internal leakage will cause the volumetric efficiency of the hydraulic system to drop sharply, failing to reach the required working pressure, or even unable to work.
The tiny dust particles intruding into the system will cause or aggravate the wear of the friction pair of the hydraulic components, further leading to leakage.
Therefore, seals and sealing devices are an important part of hydraulic equipment. Its working reliability and service life are an important indicator for measuring the quality of the hydraulic system.
In addition to the gap seal, seals are used to make the gap between two adjacent coupling surfaces controlled below the minimum gap that the liquid to be sealed can pass.
In contact seals, there are two types: self-sealing compression seals and self-sealing self-tightening seals (ie lip seals).
