A common cause of oil spill: first we introduced 1)
Assembly reasons due to installation tooling, lead to oil seal after being connected in deformation;
In the process of assembly, oil seal by screw thread or spline, cause the lip cut;
Skeleton reason due to oil seal spring material and manufacturing problems, lead to the failure in performance.
Spring failure modes for: spring too tight or too loose, too loose when spring compression force is small, can not meet the sealing effect, too tight when the spring compression strength, oil seal and the mismatch between the axis of rotation, lead to abnormal wear of oil seal, oil eventually occur.
Working medium for working medium is oil.
Oil seal material selection should consider its compatibility with the oil, the compatibility is poor, can produce the lip swelling, hardening, softening, cracking, etc. , finally the spill occurred.
Lip wear reason cleanliness: sand casting, machining iron impurities, oil, etc. , stockpiling oil seal lip area, work occurs when abnormal wear and tear;
Oil seal and axis coaxial, oil seal eccentric wear occurred after being connected, abnormal wear lip;
The reasons of shaft axis of the surface roughness and hardness is unreasonable, the auto industry is generally selects the roughness is not lower than 0.
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