Cause analysis of rubber seal ring damage

Rubber sealing ring is widely used in the sealing field because of its superior elasticity and compression resistance, which can effectively prevent the leakage of media; It is precisely because it is widely used that its use scenarios and application environments are diverse and uncertain, which are important reasons for the frequent failure of rubber sealing rings. Fracture is an important phenomenon of failure, accounting for more than 80% of the defective products; So what are the reasons for the rubber seal ring fracture? 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 the rubber ring is 10N, while the working environment has 20n, so it is easy to break under such overload; Therefore, during product design, it is necessary to consult relevant data to see how much the load of the product is and whether the product is operating under overload. Generally, it is relatively safe not to exceed 90% of the load of the product.

Aging of rubber sealing ring material: material aging is also an important reason for fracture in many cases. Each material has its own life, and it will break if it is used for a long time beyond its own life; In case of aging, the product will become hard and brittle, and then the stress concentration on the notch will lead to fracture. Therefore, the rubber sealing ring on the mechanical product needs to be replaced in time before aging and fracture, so as to avoid safety accidents due to rubber ring fracture.

The rubber sealing ring is corroded: it is easy to understand the fracture of the product after corrosion. For example, the material of the silicone sealing ring is not oil resistant. It is easy to be corroded and fractured when the silicone sealing ring is used in an oil environment for a long time; In addition, in the environment with chemical corrosion, it is easy to break without using fluorine rubber sealing rings. Only fluorine rubber sealing rings have corrosion resistance. Therefore, when selecting materials for products, it is necessary to understand the material characteristics and environmental media. Only when the materials match the use media can the products play their maximum role.