Causes of damage of rubber sealing ring

Rubber sealing ring is widely used in the sealing field because of its excellent elasticity and compression performance, which can effectively prevent the leakage of medium; It is precisely because it is widely used that its use scenarios and application environment 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 number of defects; So what are the reasons for the fracture of the rubber seal ring? 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, which is easy to fracture under this overload; Therefore, during product design, we must consult relevant data to see how large the load of the product is and whether the product is operating under overload. Generally, it is relatively safe to not exceed 90% of the load of the product.

Rubber sealing ring material aging: material aging is also an important reason for fracture many times. Each material has its own life. If it is aged for a long time, it will break beyond its own life; When the product is aged, it 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.

Corrosion of rubber sealing ring: it is 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 an oil environment for long-term use, it is easy to be corroded and fractured; In addition, in the environment with chemical corrosion, it is easy to break without using fluorine rubber sealing ring. Only fluorine rubber sealing ring has corrosion-resistant characteristics. Therefore, when selecting the material of the product, it is necessary to understand the material characteristics and environmental medium. The product can play its greatest role only when the material is matched with the use medium.