With the development of industrial technology, people's requirements for reciprocating motion are gradually increasing. With the development of energy, mining, metallurgy, railway, highway and construction industries, high-pressure, high-speed, low-friction piston rod and rubber ring combination are often encountered.
ultra high pressure sealstructure, generally referred to as "combined seal".
Piston rod seals can be divided into Glea ring, Stern seal, etc. The use of super
High pressure sealThe material is Teflon filled with Teflon. The following Hino hydraulic seals tell you the structure and use of piston ultra-high pressure seals:
(1) It is a combinationultra high pressure seal, Pre-stressed by the O-ring, which can compensate the initial state and work;
(2) The friction force is small, and the friction resistance is reduced and the wear resistance is improved due to the filling of additives such as graphite, copper powder, and carbon solder;
(3) high pressure resistance and high allowable line speed;
(4) Small leakage and pumping function;
Piston SuperHigh pressure sealFor more knowledge:
1. In the past, most of the pistonultra high pressure sealThe parts usually use o-rings, v-rings and y-rings. However, an incorrect ultra-high pressure seal form can affect frictional resistance and cause premature wear of the ultra-high pressure seal lip. Therefore, it allows the movement speed is relatively low, and is widely used in occasions with low requirements for movement speed, such as hydraulic equipment of engineering machinery, metallurgical equipment and agricultural machinery.
2. The combined ultra-high pressure sealing structure of the hydraulic piston rod is a main ultra-high pressure sealing ring made of PTFE and packing, and the other is an O-shaped elastic ultra-high pressure seal that plays the role of secondary ultra-high pressure sealing. The combined ultra-high pressure seal ring has the characteristics of low friction resistance, no crawling when starting, low leakage and wear resistance.
3, piston rod superHigh pressure sealThe combined application not only avoids the contact between metals, but also improves the carrying capacity, bears a certain lateral force, has low friction, and is suitable for high-pressure and high-speed systems.
