A variety of factors can accelerate the wear of rubber sealing rings. The following is a detailed summary of these factors:
Material factors
- 1. Chemical Incompatibility:
When rubber seals come into contact with certain oils, solvents, or chemicals, they may swell or dissolve, resulting in dimensional changes or weakened strength.
Chemical incompatibility may also cause the rubber to harden (lose elasticity) or soften (decrease structural strength).
- 2. Material Aging:
During long-term use, rubber materials deteriorate in performance due to aging, which is manifested as reduced elasticity, increased hardness, and surface cracking.
The aging process includes thermal aging (high temperature causes thermal oxidation degradation of rubber molecular chains), oxidative aging (oxygen reacts with double bonds of rubber molecules to decompose the material), ozone aging (ozone causes cracks on the rubber surface), and UV aging (ultraviolet rays cause degradation of the rubber surface).
Design factors
- 1. Improper Design:
Excessive compression may cause permanent deformation or tearing of the seal.
Insufficient compression will not form an effective seal.
Designing with sharp edges or uneven surfaces will lead to stress concentration and increase the risk of wear.
- 2. Problems with Size and Tolerance Matching:
Improper tolerance matching between the seal and the mating parts will affect the fitting effect.
If the cross-sectional size is too small, it cannot withstand high pressure, and if it is too large, it will increase the difficulty of assembly and friction loss.
Processing factors
- 1. Process Problems:
The performance of rubber sealing rings depends on the material formula. Improper formula design leads to substandard performance.
Insufficient vulcanization leads to insufficient elasticity, while excessive vulcanization increases brittleness or accelerates aging.
- 2. Surface Defects:
Surface defects such as pores, cracks, and burrs reduce sealing performance and easily cause stress concentration, leading to early failure.
Application environment factors
- 1. High Temperature and High Pressure:
A high-temperature environment accelerates the aging process of rubber and reduces the sealing performance.
A high-pressure environment increases the pressure on the seal ring and accelerates wear.
- 2. Corrosive Chemicals:
Corrosive chemicals such as acids, alkalis, and salt solutions will corrode rubber seals, causing them to decompose or degrade.
- 3. Particles and Impurities:
Particles or impurities in the working medium may cause wear or scratches on the surface of the seal ring.
External factors
- 1. Improper Installation and Maintenance:
Mechanical damage (such as scratches and cuts) during installation becomes the starting point of failure.
Improper maintenance causes premature aging or wear of the seal ring.
- 2. External Particle Contamination:
External particle contamination embeds into the sealing surface, causing scratches or wear.
Conclusion
Factors that lead to accelerated wear of rubber sealing rings involve materials, design, processing, application environment, and external factors. To reduce wear, it is necessary to consider these factors comprehensively and take corresponding preventive measures.
If you have any other questions, please visit Linde Polymers' official website for consultation www.lindeseals.com.
