Rubber O ring damage

Rubber O ring damage is mainly caused by wear and tear, mainly depends on the degree of wear and tear.

When the liquid pressure small, rubber O ring friction force depends on the size of its pre compression. When the working fluid is under pressure, the friction force increases with the increase of the working pressure. When the working pressure is less than 20MPa, the linear relationship is approximately linear. The pressure is greater than 20MPa, with the increase of pressure, increase the rubber O ring and the metal surface contact area is gradually slow, the friction force increased correspondingly slow. Under normal circumstances, the service life of rubber O ring decreases with the increase of liquid pressure will approximate the relationship of a square. The increase in the friction, so that the rotating or reciprocating motion of the shaft and the rubber O - a lot of frictional heat generated between the sealing rings. Because most of the O ring is made of rubber, low thermal conductivity. Therefore, the friction heat will cause the aging of rubber O ring, resulting in destruction of the effectiveness of sealing performance. The friction will cause the O ring to reduce the amount of compression surface damage. Serious friction will soon lead to damage the surface of the O shaped ring, lost seal.

Now we can know it is intuitive, the friction of the rubber O-rings in a great extent for the service life of the O-ring is have great influence on twisted ring O-ring effects of friction in the application, so in the application of O-ring please don't ignore the friction Oh!