Motion of bearing abrasion and countermeasures

Bearing micromotion abrasion is due to occur between two contact bodies with oxidation corrosion effect of small amplitude caused by the reciprocating sliding wear phenomenon, often occur in the reciprocating swing or affected by the vibration between the raceway surface and rolling body, can also occur between the matching surface. When a car or machine as a goods transport on the train, track the impact of the joint often make a car or machine of this type of injury of the bearings. The reasons: in the stationary state under fluctuating load and oxidation corrosion for a long time, gradually formed the wear form, can occur even if the load is small, the oxidation rate is also an important factor of this kind of damage, the vibration can make the characteristics of metal molecules escape quickly formation on the surface of the oxide, which in turn increase the wear and tear. Bearing the characteristics of the micro abrasion performance: in damage formed on the surface of the dark matte equidistant distribution of small hole, the interval approximately equal spacing or an integral multiple of roller, serious when they appear like a washboard ground pit concave and convex alternate with, or embedded in ring inside the rim, often accompanied by palm red fine rust particles, but small pit sometimes may be polished. This pit is also called the false impression, slight abrasion especially when oxidation is not obvious, and because of the heavy load of plastic pit difficult to separate, but the vibration of the micromotion abrasion will be pushed out lubricant, wear in the contact surface, and wipe away the original grinding trace on the surface, while retain the original true indentation marks, in the vast majority of cases are still able to distinguish between. In view of the micro abrasion, the following countermeasures should be taken: 1) Use machines bearing vibration source should be far away from the outside world, or open antivibration groove to prevent vibration from the foundation to bearing; 2) Machine shaft should be put in the transport without turning, or make the bearing can only turn in one direction, and to lock shaft made no axial channeling move; 3) Lower consistency of using grease lubrication, grease, but the best lubrication oil, oil viscosity at 0. 1Pa• S around for the best; 4) Within the scope of the possible bearing clearance should be made smaller, preloaded mounting or use.