Hydraulic seals are an important component of hydraulic devices, which can effectively prevent and eliminate hydraulic device leakage problems, and improve device operation efficiency.
1, Structural form
With the expansion of the application scope of hydraulic devices, the types of hydraulic seals used are also gradually increasing. Compared with the operating forms of the joint surface of hydraulic seals, they can be divided into two forms based on whether they can perform relative motion: static seals and dynamic seals.
Further detailed analysis of the application of these seals can be divided into six forms according to the differences in structural forms. These six types of seal structural forms not only include sealing gaskets and packing seals, but also involve self sealing compression seals and self sealing tight seals. In addition, combination seals and dust seals are also commonly used forms in hydraulic seals.
2, Sealing effect
In modern industrial production, although there are significant differences in the structural forms of hydraulic device seals, there are significant similarities in the overall sealing performance. They are all sealed and protected by their own elasticity, plasticity, or elastic-plastic deformation. Under the action of hydraulic seals, the sealing surface will generate high initial contact stress, effectively preventing the leakage of pressureless liquid and improving the overall operational performance of hydraulic seals. When the hydraulic transmission device is in operation, the pressure liquid will have a significant squeezing effect on the sealing lip. At this time, the sealing lip will closely adhere to the sealing surface and generate higher pressure. As the liquid pressure increases, the additional contact force of the hydraulic seal also gradually increases, resulting in certain elastic and plastic deformation problems. This deformation can effectively prevent pressure liquid leakage, which is beneficial for the safety of hydraulic devices Stable applications have a positive effect.