Failure Analysis Of Common Automobile Oil Seals (3)

Damage to the housing of the automotive seal leads to leakage:

1. Insufficient lubrication: cause abnormal wear on the lip. Try to add lubricating oil to the specified amount before running. Apply grease between lips. The structure near the oil seal can be changed.

2. Abnormal oils: cause the lips to swell. Change to a lubricant that will not swell the lip material. Do not clean the oil seal. Use lubricating oil when cleaning the machine.

3. Abnormal high temperature: the entire lip is hardened and cracked. Different from the predetermined temperature conditions at the time of design, the oil temperature rises and exceeds the heat resistance limit.

4. Excessive pressure: There are cracks on the lip and waist, or the lip is turned over or abnormally worn. Excessive alignment will also deform the oil seal skeleton, resulting in seal failure. The oil seal has abnormally high pressure during operation. Improve the operating conditions of the oil seal, make it a structure without pressure, or set up a vent hole. Use pressure-resistant oil seals instead.

5. Foreign matter jamming: The lip end is abnormally worn, damaged, and foreign matter is attached, and debris, dust and sand, liquid sealant, paint, etc. are attached to the shaft and oil seal, causing jamming. Do not contaminate dust and sand on the oil seal and shaft during assembly. When using sealant, try to avoid falling around the oil seal. When spraying the oil roller, try to avoid contact with the oil seal and the mating shaft. Please wash the assembly and parts regularly, or clean before use.