The damage in the use of the gasoline engine bearing is mainly wear, fatigue, peeling and ablation. The surface cleanliness of the parts is poor.

　　Low machining accuracy, maintenance and improper use (FIG. 2 shows the damage to the axial alloy).

　　The reasons for the abnormal shaft damage are:

　　The parts are not clean, residual metal impurities, sand or dust are attached to the alloy surface of the shaft and bearing.

　　Poor maintenance: lack of lubricating oil or lubricants, deteriorated, not replaced regularly. Oil in oil contains moisture

　　When high speed and high load operation, oil pressure, oil, viscosity drop, can not form the oil film and create half a thousand friction, axle surface

　　Under the instantaneous impact load, erosion damage is produced.

　　The bearing of the shaft is too high, and the gap between the collar and the shaft is too small to have sufficient moisture

　　Lubricating oil. Can not form oil film, causing local 10 friction.

　　Improper use: engine overloading slow speed allows the shaft and bearing to produce boundary lubrication. If the traction is not enough, use low gear

　　Increase the speed of engine, produce high temperature for a long time, and reduce the oil viscosity. Direct contact between metal, the axial surface of the interior

　　Fatigue flaking, first crack, then transverse crack.

　　According to the characteristics of early damage, the preventive measures are:

　　Use high quality lubricants, check the oil quality regularly, find the dilution, the metamorphism. Should be replaced in time.

　　Strictly abide by the operating rules. Use vehicles properly and avoid overloading and overloading.

　　The cleanliness of the assembly of the parts in strict repair procedures; According to the specification, the shaft is selected