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2022

Reasons for failure of rotating seal ring

The influence of the soft and hard of the rotating sealing ring: In many cases, the function and structure of the product can be completely changed according to the soft and hard of the silicone product. Therefore, in the application process of the rotating sealing ring, due to the selection of different soft and hard, the sealing ring will There are some inevitable problems, such as extrusion gap, excessive stress, too high hardness, product deformation does not rebound, etc.

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　　Rotating seal ringThe influence of soft and hard: In many cases, the function and structure of the product can be completely changed according to the soft and hard of the silicone product. Therefore, in the application process of the rotating sealing ring, due to the selection of different soft and hard, the sealing ring will appear some inevitable problems, such as extrusion gap, excessive stress, high hardness, product deformation does not rebound, etc.

The rotary seal ring is widely used in the sealing field with its superior elasticity and compression performance, which can effectively prevent the leakage of the medium. Due to its wide application, its application scene and environment have diversity and uncertainty, which are the important reasons for the frequent failure of the rotary seal ring.

① Sealing ring clearance

The gap problem can be divided into several factors. First, due to the raw rubber material, many silicone materials show poor resilience due to formula, and insufficient tensile force leads to cracks in the application process, resulting in leakage. However, the processing problems of silicone ring manufacturers, such as products with fragile products that lead to thinner edge thickness, often show such problems. When the products soften, the rubber material has an immature internal protrusion, after long-term tensile compression, deformation cracks.

② Overload

Each material and product has its own safety load, and the rotating seal ring is no exception. It is easy to break under such overload.

③ Material aging

In many cases, material aging is also an important reason for fracture. Each material has its own life span. After long-term use, aging beyond its own life span will break. After aging, the product will harden and become brittle, and then stress concentration will occur at the notch, resulting in fracture. Therefore, the rotating sealing ring on the mechanical product needs to be replaced in time before aging and fracture to avoid safety accidents caused by rubber ring fracture.

④ Sealing quality

The production quality of seals is closely related to the reliability of products. Common problems include: unstable raw material quality, incorrect mixing materials, improper storage of raw materials or rubber materials (cross contamination), uneven mixing, improper curing conditions (temperature, time, pressure, etc.), improper storage of sealed products, improper use of molds, etc. These problems often involve quality control in the production process.

⑤ Design error

Design errors are usually caused by the designer's insufficient understanding of the product, such as insufficient estimation of the sealing pressure, misunderstanding of the contact stress distribution of the sealing surface, and unreasonable design of the sealing groove.

Key words:

Rotating seal ring