Motor network many fault bearing lubrication system is the root cause of problems. Bearing lubrication system is the main factor affecting the service life of bearing, the motor running plays a vital role. Principle of the motor bearing lubrication is grease under the effect of shear force, its three-dimensional fiber mesh structure pulled out the lubricating oil, in the rolling element bearing, bearing, and form a layer of oil film bearing race, then the lubrication effect. Working principle of the bearing lubrication equipment in the process of actual operation, when the new start rolling of bearing grease, grease, first of all, was thrown from the rolling element, and quickly circulate in the bearing cover of the cavity, cooling; Subsequently, grease from the rotation of the bearing race again the lateral cuts to the rolling elements. Cling to the surface of the rolling element part of grease in shear under the action of tensile fiber mesh structure, make the minority of lubricating oil in the rolling element and form a layer of lubrication film on the surface; The rest of the grease is still intact fiber mesh structure, cooling and sealing role. From the working principle of the grease in the bearing, the grease inside the motor bearing is not relying on adhesion on metal surface grease lubrication, but as the liquid inside the cavity of bearing cover cycle activities, namely continuously to out of rolling element bearing cover inside the cavity, and then returning from bearing cap cavity on the rolling element, and then repeatedly cut and cooling. This process not only can form stable within the bearing oil film, also can ensure the balance of the internal temperature of the bearing. Common problems and treatment method (1)Smacked a fat liquefaction, lead to bearing non-lubricated dry grinding, have short bearing apart and lock, eventually lead to overload electrical JiSao chamber, winding burned down. Because most of the motor itself the source of the problem caused by high temperature or high bearing temperature grease mutation, should choose and motor function and operating condition of high temperature grease right itself. （2)The grease condensation to rolling. The conditions are poor quality or the working temperature of the grease and grease caused by temperature is not suitable for the actual working conditions, in low temperature environment should choose the grease is suitable for low temperature operation. Cause poor lubrication when the motor starting, if because motor slow long run, is only starting process is because the motor current is too large to burning. （3)Grease its own quality problems. If the working temperature of the grease is not in conformity with the requirements, or when the electric operation base oil evaporation, causing no grease lubrication. In order to avoid similar problems, should be especially stable motor manufacturers choose grease, avoid because fat is not in conformity with the cause of quality problems. For a motor, the material of the grease cost proportion is very small, not too due to save money on lipid to small loss. （4)Oil in the process of motor cannot constitute a good circulation. The problem is, in fact, quite a few problems, motor manufacturers don't realize bearing inner lid, the design of the bearing cover their structure, the degree of stator alignment, bearing and shaft, bearing and bearing housing cooperative ties all affects the cycle of, after all, in different degrees. Many motor manufacturers adjusted within the bearing cover cavity depth, add the bearing oil baffle plate, to ensure that the stator alignment degree to reduce motor rotors of channeling in the process of operation, adjust the way such as bearings and related parts and components of the radial cooperation tolerance and see significant role. Proved that the design of motor bearing grease is a good circulation system is an important technique of processing quality of bearing fault, but often motor manufacturers do not necessarily understanding and cognition to the problem, especially the design staff, should ensure that oil dredge and recycled, theoretically on the design of the bearing cover more elegant, contains inner cavity shape of the bearing cover, such as width, depth and scale could better deal with the problem was.
