General use of rolling bearings, because of friction small damage smaller, so the life of the rolling bearing fatigue life can be achieved. However, if due to an accident in the course, can also cause early damage, which cannot be used. Is not generally cannot be used because of the fatigue life, we become early damage or malfunction or failure. Commonly occurs in FAG bearings on the installation, use, lubricate, and so on.
Bearing structure different mechanical structure under normal circumstances are different, the processing is not the same, if you use does not match on different parts of the rolling bearing, so sure is easy to cause damage to rolling bearings.
Improving processing; processing of rolling bearing heat treatment lower hardening heating temperature is best used on a link, the appropriate extended holding time, doing so can improve bearing alloy concentration, you can increase the impact toughness of NSK bearings. Improving process monitoring tools; promote quality improvement. Road curvature location monitoring such as improved circulation, improving the overall performance of the car bearing after Assembly, improved working conditions for rolling bearings.
Preventive measures
1, the measurement block main bearing hole concentricity and roundness, measuring both the crankshaft runout, to match Bush′s thickness, even lubrication gap. Preparing Bush rescrape method can also be used.
2, increasing bearing repair and Assembly quality, strictly control the quality of connecting rod. Old and new connecting rods are required to measure its degree of parallelism and distorted, unqualified prohibition of connecting rod Assembly; two bearing housings of the tile should be higher by bearing plane 30-50mm, to ensure that SKF bearings does not loose; when assembling the crankshaft to prevent skewed and uneven bearing bolt torque to avoid crankshaft deformation. Clean Assembly environment to produce cylinder dust cover, ensure the cleanliness of diesel engine Assembly.
3, rational choice and add oil and ensure clean.