Failure forms and solutions of rubber O-rings

Posted by ai on March 7th, 2020

As we all know, the use of rubber O-rings is very extensive, and plays a very important role in various industries. Therefore, the failure of the O-ring will cause a lot of accidents and will bring great losses to the user. Next, let's take a look at the failure forms of rubber O-rings and their solutions, hoping to help everyone. hydraulic seal manufacturer recommends.

Method / step

Form of failure one, installation damage: that is, the seal partly or completely presents a neat wound.

Reasons: sharp edges and corners, no chamfers; seal size is not correct; seal hardness or elasticity is too low

Solution: sharp edges and corners, no chamfer; seal size is not correct; seal hardness or elasticity is too low

Form two of failure, the seal is curled.

Reasons: Installation caused; the movement speed is too low; the material is too hard or the elasticity is too low; uneven surface treatment of the O-ring; uneven groove size; rough groove surface and insufficient lubrication

Solution: correct installation; choose high elastic material; choose self-lubricating material; proper groove design and achieve required processing accuracy; try to use support ring

Form three of failure, excessive compression: The surface of the seal is deformed in plane and may be accompanied by cracks.

Reason: the design is not reasonable; the deformation of the material due to heat or chemical media is not considered; the pressure is caused by the excessive pressure

Solution: The groove design considers the deformation of the material due to heat or chemical media

Form 4 of failure, extrusion: The seal has a rough, ragged edge, usually on the low pressure side

Reasons: Too large clearance; Too low hardness or elasticity of seal; Too small groove space; Irregular gap size;

Corners are too sharp; seals are not the right size

Solution: reduce the gap size; choose a seal with better elasticity and higher hardness; reasonable groove design; choose a suitable size seal

5

Form of failure 5. Chemical corrosion: Chemical corrosion can cause defects such as foaming, cracking, small holes, and discoloration.

Knowing its physical properties

Reason: the material does not match the medium or the temperature is too high

Solution: Choose materials that are more resistant to chemical media