Reasons and maintenance methods for oil leakage of IKO bearing oil seal

The oil seal is an important part of agricultural machinery and various types of mechanical equipment. The feeler gauge is inserted between the two rows of rollers on the IKO bearing and the outer circle and is widely used around the IKO bearing center. Its performance and quality directly affect the reliability of the use of agricultural machinery and various mechanical equipment. Some oil seals have a long life span of one year, a few months or even three or five days, and oil leaks due to poor sealing. This situation has seriously affected the working efficiency of agricultural machinery and various mechanical equipment, which not only increases fuel consumption and production costs, but also pollutes the environment.

First, the working principle of the oil seal 1. In the free state, the inner diameter of the oil seal lip is smaller than the shaft diameter, and has a certain amount of interference. 2. After installation, the interference pressure of the oil seal cutting edge and the contraction force of the self-tightening spring generate a certain radial pressure on the rotating shaft. 3. When working, the oil seal lip forms a sealing contact belt of 0.25 to 0.5 mm width under the action of radial pressure. Under the action of the lubricating oil pressure, the oil penetrates into the oil seal edge and forms a very thin oil film between the rotating shaft. The inner friction of the lubricant at the contact and the agitation and extrusion of the lubricant are affected by the surface tension of the oil, forming a “new moon” on the outer edge of the shaft and the oil seal to prevent oil from overflowing and sealing. .

Second, the main factors causing oil seal oil leakage The oil seal is not strict is the main cause of oil leakage. When the shaft wears and forms a groove, even if the new oil seal is replaced, the contact pressure of the oil seal lip and the shaft is lowered, so that the interference of the diameter of the oil seal lip and the shaft diameter after installation is too small. Taking the crankshaft oil seal of S195 diesel engine as an example, the main reasons for the poor sealing are: 1 poor quality of oil seal manufacturing; poor quality of 2 shaft or IKO bearing; 3 improper use and maintenance; IKO bearing measurement error does not mean that the inspection tolerance can be relaxed 10%4 improper installation; 5 improper storage, adversely affected by environmental pollution.

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Fatigue life, noise life and lubrication life of KOYO bearings

The KOYO bearing's burnout life, noise life and lubrication life are just KOYO bearings. Rolling KOYO bearings during operation, accept a certain load, that is, static load, but for steel balls and raceways, the stress is recurrent, the data will be ignited and burned, and then KOYO bearings will reach the end of life. The phenomenon is that a part of the rolling surface data suddenly disappears like a fish scale. This phenomenon is called burnout. The noise life is very small for the KOYO bearing of the household appliance, the KOYO bearing is very small, and the KOYO bearing has a long service life. However, after the KOYO bearing is operated for a while, wear, vibration noise, grease deterioration, etc. may occur. Because the KOYO bearing noise request for the appliance is serious, when the KOYO bearing noise exceeds the allowable limit, it is considered that the KOYO bearing can no longer be used. The total time of KOYO bearing low noise operation is called KOYO bearing noise life. Lubrication life

KOYO bearings for household appliances are equipped with maintenance-free grease-lubricated KOYO bearings. Although KOYO bearing lubrication requires only a small amount of lubricant, KOYO bearings are poorly lubricated due to deterioration and leakage of grease after a long period of operation, and then KOYO bearings are ineffective. The total time of operation of KOYO bearings under superior lubrication conditions is called KOYO bearing life.

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