Preventive measures for oil leakage of polyurethane seals

1. Grasp and identify the basic knowledge of fake and inferior products, and buy high-quality and standardized polyurethane seals and oil seals.

2. During installation, if the outer surface roughness of the shaft diameter is low or there are defects such as rust, rust, burrs, etc., use a fine sand cloth or a whetstone to polish and smooth it; Apply cleaning oil or grease to the matching parts of the shaft diameter. Apply sealant to the outside of the oil seal of the polyurethane seal, and wrap the groove on the shaft with a cardboard shell to prevent scratching the oil seal lip of the polyurethane seal. Use common tools to turn the oil seal of the polyurethane seal inward and insert it. Do not smash and punch hard to prevent the polyurethane rod seal oil seal from being deformed or broken and yellowing and ineffective; if the lip is reversed, the spring falls, and the polyurethane seal oil seal is inclined, be sure to remove it and reinsert it.

3. Polyurethane seals and oil seals used in mechanical equipment are generally subject to extreme standard work, large temperature differences in the natural environment, a lot of floating dust, and machine vibrations often cause the parts to withstand continuous changes. Inspection, maintenance and maintenance are required. maintainance.

4. If the shaft diameter and rolling bearing are seriously damaged; the vulcanized rubber of the polyurethane seal oil seal is embrittled or the elastic yellow is invalid, etc., the corresponding components should be repaired and replaced immediately.

5. Immediate fault detection should be performed on abnormally hot components or the entire process; prevent mechanical equipment from overspeeding and overloading, so as to avoid the temperature rise of the oil seal lip of the polyurethane seal, the embrittlement of the vulcanized rubber, and the initial damage of the lip.

6. Always check the amount of oil and oil. If there is too much oil residue, alloy powder and iron pins of metal materials should be completely replaced with new oil. The brand and quality of the oil to be changed should be in accordance with the regulations of the season.

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