Rubber sealing ring is widely used in the field of sealing because of its excellent elasticity and compression performance, which can effectively prevent the leakage of medium; It is because it is widely used, so its use scenarios and application environment are diverse and uncertain, which are the important reasons for the frequent failure of rubber seals. Fracture is an important phenomenon of failure, accounting for more than 80% of the number of defective rubber seals; So what causes the rubber seal ring to break? Here is a brief introduction.

Overload of rubber sealing ring: each material and product has its own safe load, and rubber sealing ring is no exception. For example, the rated load of rubber sealing ring is 10N, while the working environment has 20n, so it is easy to fracture under such overload; So in the product design, we must consult the relevant information to see how much the load of the product is, whether the product is in overload operation, generally not more than 90% of the load of the product is relatively safe.

Rubber sealing ring material aging: in many cases, material aging is also an important reason for fracture, each material has its own life, long-term use of aging beyond its own life will fracture; Aging products will become hard and brittle, and then stress concentration occurs on the notch, leading to fracture. Therefore, the rubber sealing ring on mechanical products needs to be replaced in time before aging fracture, so as to avoid safety accidents caused by rubber ring fracture.

Corrosion of rubber sealing ring: it's easy to understand the fracture of the product after corrosion. For example, the material of silicone sealing ring is not oil-resistant. How to put the silicone sealing ring in the environment with oil for a long time is easy to be corroded and fractured; There is also the chemical corrosion of the environment, how not to use fluorine rubber seal ring is very easy to break, only fluorine rubber seal ring has the characteristics of corrosion resistance, so in the product selection of materials, we need to understand the material characteristics and environmental media, only when the material and the use of media match, the product can play its maximum role.