Under normal use, the O-ring will not produce distortion or rolling under reciprocating motion, because the contact area between the rubber O-ring and the groove is greater than the friction contact area on the sliding surface, and the resistance of the rubber O-ring itself can prevent distortion. However, in the case of improper use, it will easily cause distortion and thus lead to damage, and then cause leakage.
There are three main reasons for the distortion of the O-ring
1, piston, piston rod and cylinder clearance is not uniform;
2, O-ring section diameter is not uniform;
3. The friction of O-ring is not uniform
Here are some ways to reduce the distortion of the O-ring:
1. Choose the right O-ring material, you can choose the material with low friction coefficient. Especially when used in high temperature or chemical corrosive environment, choose high temperature or corrosion resistant materials.
2. Increase the section thickness or radial thickness of the O-ring, and use appropriate pretension force to avoid strong impact or vibration and reduce the deformation of the O-ring.
3. Ensure that the quality and quantity of lubricating oil or grease are appropriate to avoid excessive distortion caused by dry friction or poor lubrication.
4. During the installation process, the O-ring should be avoided as much as possible from being stretched or stuck in the installation hole, adhere to the corresponding installation position, and use appropriate tools and methods for installation.
5. Do a good job of balance and symmetry of the O-ring, as far as possible to reduce its unilateral distortion in use.
6. Regularly check and replace the O-ring with aging, hardening, damage, deformation and other problems to ensure its good sealing effect and service life.
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