First, O Ring Seals is a circular shape of the sealing element, it is widely used in a variety of mechanical equipment, in a certain temperature, pressure and different liquid or gas medium to play a sealed role, and other seals Compared to the loop, with the following superior performance:
①, O Ring Seals sealed parts of the structure is simple, compact installation, and lighter weight.
②, O Ring Seals-sealing effect, often only one seal will be able to complete the sealing effect.
③, good sealing performance, used as a fixed seal when almost no leakage, used as a sports seal, only when the speed is high when some leakage.
④, movement friction resistance is very small, for the occasion of the pressure can also be adapted.
⑤, O Ring Seals size and groove has been standardized, low cost, easy to use, easy to use and outsourcing.
Compared with other seals, there are three problems:
①, starting the frictional resistance.
②, used as a pneumatic device seal, you must add lubricating oil to prevent wear.
③, the coupling parts, such as the movement surface, grooves, gaps and other processing size and accuracy requirements are very strict.
Structural Design Principle of O - ring Rubber Seal
O Ring Seals are generally sealed by the rebound produced by the compression, but with the increase in pressure, it is squeezed into the sealed cloud and shape changes,
In order to make the O-ring rubber seal has a good sealing effect and extend the service life, must be made of O Ring Seals groove and seal the gap between the design of the appropriate design, when the gap is too large O Ring Seals in the oil The role of squeezing the gap, causing damage, causing leakage. When the working pressure is less than 9.8Mpa generally do not design retaining ring, when the pressure is greater than 9.8Mpa O Ring Seals pressure surface is easy to be squeezed, should add ring; if one-way pressure, set a block in the pressure surface Circle, if the two-way pressure will have to set up two retaining ring.