The main mode of rolling bearing fault

1. Fatigue spalling of rolling bearing inner and outer raceway and rolling body table is accept load and relative rolling, as a result of the action of alternating load, first, certain depth under the surface ( Maximum shear stress) Appearance made a crack, and then extended to contact surface spalling pit, finally carried out the large peeling, this kind of phenomenon is the fatigue spalling. In the operation of fatigue spalling will form the impact load, vibration and noise. 2. Wear due to dust and the invasion of the foreign body, relative motion of raceway and rolling element will make up the appearance of wear, smooth and bad will aggravate the wear, the wear of the bearing clearance increases as a result, the surface roughness increases, reduces the bearing running accuracy, thus reduce the movement precision of the machine, vibration and noise is increased. Restrictions on fine mechanical bearings, is often wear the bearing's life. 3. Plastic deformation when the shaft to the excessive impact load or static load, or because of the thermal deformation provoked the additional load, or have a high hardness of foreign intrusion will be in the groove on the surface dents or scratches. This will make the bearings produce violent vibration and noise in the process of operation. And once you have indentation, creasing provoked impact load will further the spalling of full appearance. 4. Rust corrosion is one of the most serious problem of rolling bearing, high precision bearing may be due to the loss of appearance corrosion by precision and can't continue to work. Water, acid or alkaline substances will direct shooting provoked bearing corrosion. Landing after the bearing to suspend the work, bearing temperature reaches the dew point, moisture in the air condenses into water droplets are attached will also provoked rust bearing appearance. In addition, when bearing internal current, current possible through the raceway and rolling contact points on the body, thin oil film provoked edm and produce electric erosion, constitute a washboard in appearance of the uneven. 5. High fracture rupture may make up the load bearing parts. Improper grinding, heat treatment and assembly gets up the residual stress, thermal stress at work is too large will make up the bearing parts. In addition, improper assembly method, assembly technology, also can form bearing ring guard and roller chamfer impellers. 6. Agglutination in smooth, under the condition of high speed and heavy loading, fever, because of friction bearing parts can be in a very short time to reach a high temperature, burn and hood from appearance. One component glue refers to the appearance of metal adhesion to another parts parts appearance. 7. Adhere to the frame damage due to improper assembly or use may be provoked adhere to attack deformation, increase it and rolling friction between the body, and make some card roller die can't scroll, may also form frame and attacks on inner and outer friction, etc. The damage will be further exacerbated vibration, noise and heat, cause damage of bearing.