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Analysis of oil leakage inspection and prevention of automobile oil seal
Most of the crankshaft bearing parts of the automobile engine are installed with sealing rubber oil seals, whose main function is to prevent the leakage of lubricating oil to the outside, and prevent dust, sand and other dirt from being immersed in the interior of the engine, thereby improving the lubrication effect and service life of the automobile engine. If the rubber oil seal has oil leakage phenomenon, it is mostly caused by wear, aging or scratches and grooves on the rotating shaft journal that works with it.
Oil leak inspection and prevention of rubber oil seal:
- The reason for the oil seal oil leakage is that the lip of the oil seal produces a radial load, that is, radial pressure, in the rotating contact with the journal. If the radial pressure is too small, the friction is reduced, although the wear can be reduced, the leakage of the lubricating oil will increase, resulting in oil seal oil leakage; If the radial pressure is too large, although it can reduce the wear, although it is conducive to sealing, but the lip of the oil seal is seriously worn within a short service time, resulting in oil seal oil leakage. In addition to the radial pressure, the factors that affect the sealing performance of the oil seal also include the eccentricity of the journal and the linear speed, the roughness of the surface, the material of the oil seal, the smoothness of the lip, and the elasticity of the self-tightening spring. In addition, the lack of lubricating oil or too dirty oil and sand and other foreign bodies invade, will aggravate the oil seal lip wear, make the oil seal loose, resulting in seal failure.
2, the harm of rubber oil seal oil leakage after the engine oil seal oil leakage will cause oil leakage, affect the lubrication of the engine crankshaft journal in the short term, accelerate the wear of the journal, and reduce the service life of the automobile engine. The leakage of oil may also cause the accumulation of dirt and dust in the leaking part, resulting in the abrasive wear of the engine crankshaft journal, which affects the normal operation of the engine. A long time of oil leakage may also cause serious consequences such as engine burning due to too little oil.
- The main measures to prevent oil leakage from rubber oil seals are good quality oil seals. When selecting the oil seal, not only should we look at the size of the oil seal, but also should carefully check its quality. Good quality oil seal skeleton hard, no deformation, oil seal rubber and skeleton firmly combined, its lip has good toughness, and no defects, self-tightening spring without rust and deformation.
In the process of use, it is necessary to ensure that the oil seal is not short of oil, not much oil, the lack of oil will cause the oil seal to be burned and aging by high temperature, and too much oil will cause the oil in the box to spill, and the oil seal will be broken. The box with air holes or ventilation devices shall be kept unblocked. If the journal has been worn out grooves, it can be repaired in time by surfacing welding and then machining. Aging and damaged oil seal should be replaced with new parts in time.
