O-ring: the "universal cornerstone" of industrial seals
Jul 07,2025
In the hidden corner of mechanical equipment, a rubber ring with a diameter of only a few centimeters carries the sealing cornerstone of modern industry - O-ring.
In the hidden corner of mechanical equipment, a rubber ring with a diameter of only a few centimeters carries the sealing cornerstone of modern industry - O-ring.
The Technical Essence of O-rings: A Micro Miracle of Elasticity
The core principle of O-ring is to use the elastic deformation of rubber material to form radial or axial contact pressure in the groove, thereby achieving static or dynamic sealing. Its performance advantage stems from three physical characteristics:
Stress relaxation characteristics: The initial high contact stress after installation gradually decreases to a stable value over time, balancing sealing and wear;
Pascal fluid pressure transmission: The system pressure is transmitted through rubber, causing the O-ring to self seal under high pressure;
Section compression ratio design: The compression ratio is usually controlled at 15% -25%. If it is too small, it will cause leakage, and if it is too large, it will cause permanent deformation.
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