We all know that the main functions of rubber seals
are sealing performance and shock absorption, but why rubber seals have these two functions, many people do not know, in fact, this is mainly related to the raw materials of rubber seals. That is, the elastic deformation of rubber that we commonly use is the primary condition to support the sealing performance of rubber seals. We all know that the main functions of rubber seals seals are sealing performance and shock absorption, but why rubber seals have these two functions, many people do not. You know, in fact, this is mainly related to the raw materials of rubber seals, which is our commonly used rubber. The basic characteristics of rubber that we know are elasticity and high density, so elastic deformation is the first and foremost to support the sealing performance of rubber seals. Conditions, let's look at them in detail. The fundamental reason why rubber seals can automatically activate energy under the pressure of sealing fluid is the elasticity and resilience of rubber seals. Whether it is static sealing or dynamic sealing, this valuable characteristic of rubber seals is inseparable. 700)this.width=700' border=0 src='HTTP://www.orksealing.com/UploadFiles/20210927161444527.jpg'> The rubber seal should be installed into the groove in an extended state, and it should be subjected to large The elastic deformation (interference) of the seal cavity allows the seal cavity to rely on the resilience of the rubber seal to generate the allowable sealing force within the tolerance range. The elastic deformation of rubber enables it to maintain its tightness under different motion states, even when the running surface is not concentric, which is a large deformation under low stress. Due to the high Poisson ratio of rubber, under the applied axial fluid pressure, the rubber seal can automatically appear a radial sealing force proportional to it (the volume remains basically unchanged before and after deformation). As a result, rubber seals can be successfully installed in relatively simple, inaccurate sealing cavities, and have wider tolerances than other sealing materials. The above is a specific introduction to the reasons for the sealing performance of rubber seals. It can be seen from the above that elastic deformation is indeed the primary condition for seals, but here we also have to repeat that elastic deformation alone is not enough. high characteristic.
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