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

by:ORK      2022-11-21
IKO bearings are often used in agricultural machinery and various types of machinery and equipment, and are important parts, but some users of IKO imported bearings make IKO bearings scrapped due to oil leakage from the oil seal. This situation seriously affects the working efficiency of various mechanical equipment, which not only increases fuel consumption and production costs, but also pollutes the environment. 1. The working principle of IKO bearing 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 edge and the contraction force of the self-tightening spring will produce a certain radial pressure on the rotating shaft. 3. When working, under the action of radial pressure, the oil seal lip forms a sealing contact ring with a width of 0.25 to 0.5 mm. Under the action of the lubricating oil pressure, the oil penetrates into the oil seal edge and the rotating shaft to form a very thin oil film. The oil film formed by the internal friction of the lubricant at the contact point and the stirring and extrusion of the lubricant is affected by the surface tension of the oil, forming an oil film on the outer edge of the rotating shaft and the oil seal edge.“new moon”The surface prevents oil from overflowing and plays a sealing role. Second, the main factors causing oil leakage of IKO bearing oil seals: The lack of tight oil seal sealing is the main factor causing oil leakage. When the shaft is worn and a groove is formed, even if the new oil seal is replaced, the oil seal still cannot be sealed, because the contact pressure between the oil seal lip and the shaft decreases, resulting in too little interference between the diameter of the oil seal lip and the shaft diameter after installation. Taking the oil seal of the crankshaft of the S195 diesel engine as an example, the main reasons for the lack of tight sealing are: 1. Poor manufacturing quality of the oil seal; 2. Poor quality of the shaft or IKO bearing; 3. Improper use and maintenance; the measurement error of the IKO bearing does not mean that the inspection tolerance can be Relax by 10% ④ Improper installation; ⑤ Improper storage, adverse effects caused by environmental pollution. 3. Countermeasures for oil leakage due to poor sealing of oil seals 2. During installation, if the outer surface roughness of the shaft diameter is low or there are defects such as rust spots, rust, burrs, etc., use a fine emery cloth or oil stone to smooth it; apply clean oil or grease on the oil seal lip or the corresponding position of the shaft diameter. Apply sealant to the outer ring of the oil seal, wrap the keyway on the shaft with hard paper to avoid scratching the lip of the oil seal, and use a special tool to rotate the oil seal inward and press it in. Do not smash hard to prevent the oil seal from being deformed. Or break the spring and fail; if the lip is flanged, the spring falls off and the oil seal is skewed, it must be removed and re-installed. It should be noted that when the shaft diameter is not worn and the oil seal spring has sufficient elasticity, do not tighten the inner spring without authorization. 3. Oil seals used in agricultural machinery generally have poor working conditions, large environmental temperature differences, a lot of dust, and frequent machine vibrations, when the stress conditions of the parts are constantly changing, they should be inspected, maintained and maintained frequently. 4. If the shaft diameter and IKO bearing are seriously worn; the oil seal rubber seals is aging or the spring is invalid, etc., the corresponding parts should be repaired and replaced in time. 5. Troubleshoot abnormally hot components or assemblies in time; avoid mechanical overspeed and overload operation to prevent oil seal lip temperature rise, rubber seals aging, and early lip wear. 6. Always check the oil level of the oil. If there are too many impurities in the oil, alloy powder and metal iron filings should be completely replaced with new oil. The brand and quality of the oil changed should meet the requirements of the season. 7. Oil seals that are not used temporarily should be kept properly to prevent them from being stained with oil, dust or sun exposure. 8. When the shaft diameter is worn into“V”When the contact pressure between the new oil seal lip and the shaft cannot be used to seal the oil, AR-5 two-component adhesive can be used for bonding, which is simple, reliable and wear-resistant. You can also use the method of oil seal displacement to make up for it. https://www.orksealing.com/
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