Motor bearing run laps emergency treatment measures

Motor bearing run laps emergency treatment measures A: the harm of bearing run laps, 1) The negative effects on the equipment is very large, it intensifies with parts of wear, serious and even subscription fee, damaged equipment, reduce the machine precision; （ 2) Due to the increased friction, put a lot of energy into useless heat and noise, reduce the efficiency. If appear this kind of circumstance, should according to the actual situation, to stop running as soon as possible, arrange maintenance. B: the cause of the bearing run laps, rolling bearing and shaft ( Hole) To cooperate, for shaft and hole, the machining accuracy of bearing, tolerance, material, installation, assembly precision, and the use of maintenance requirements is very strict, what is bad is likely to run laps. Choose improper fit tolerance: motor bearing run laps emergency treatment measures 1, bearing the author remind: if the fit tolerance of bearing and shaft and hole slants big, Clearance fit) Smaller, mutual extrusion, and axis ( Bearing) Will be under the effect of torsion, the static damage to each other, sliding, we call it 'run laps phenomenon happened. Bearing inner ring with the axial sliding said within laps, sliding bearing outer ring and bearing hole happen according to run outside. 2, machining precision and installation accuracy does not meet the requirements: refers to the shaft, bearing, bearing hole machining tolerance, surface roughness, the installation of assembly accuracy and other technical parameters. These countries also have industry standards, once can not meet the standard demand, will affect the fit tolerance, in the process of bearing the dismantling of the burr to pull off, causing shaft and hole, fit clearance, reasonable tolerance matching conditions are destroyed. 3, the shaft alignment can not meet the requirement: can make with the bearing vibration sound, shaft bending, load is bigger, cause, increase the number of replacement of bearings, bearing failure affects the bearing and shaft ( Or hole) The fit tolerance, everything is not normal are likely to cause bearing run laps and bearing failure. 4, shaft and bearing material chooses inappropriate: different kinds of bearings should be compatible with the bearing steel manufacturing, strength and stiffness of shaft, need to be able to adapt to the operation of the bearing, better wear resistance, bearing friction coefficient was smaller, so that to ensure the normal use of bearings, reducing the possibility of a run laps. 5, daily maintenance is not in place: motor bearing circle emergency treatment measures 1, bearing running laps prevention ( 1) For general industrial operation of the motor, bearing fit design can be reference to the existing mature standard reasonable choice bearing and bearing clearance, strictly control the manufacturing process shaft axis machining precision, form and position tolerances, improve the fit precision of the assembly parts. Reduce made shaft caused smaller and make the shaft hole of any abnormal operation design. ( 2) For motor used in wind power industry, bearing fit is no mature standard design reference, must according to the characteristics of wind turbine, the characteristics of transmission, frequent start-stop reliable to select bearing fit. From the following aspects: a. Choose according to mutation maximum load with the axis of interference, as far as possible big, Technology can achieve within the scope of license) ； b。 Try to increase the hardness of axis, not differ with the hardness of bearing ring too much; c。 In the range of allowable costs, increase the reliability of the bearing running, as far as possible in the moment of inertia of big bearing; d。 To reduce the cross section thin-walled bearing temperature rise, such as strengthen the bearing lubrication, appropriate chooses large clearance of rolling bearings. e. To prevent bearing by electric erosion, produce shaft current, increase the bearing temperature rise, filter and reliable grounding measures should be taken to design. 2, strengthen the quality control in the process of assembly manufacturing motor bearing run laps emergency treatment measures ( 2) Stop bearing lock, in the end must be preloaded bearing friction. （ 3) When processing shaft and hole must guarantee the machining precision, roughness: Ra≤ 0. 8μ M, alignment: does & le; 0. 05年μ m。 （ 4) Shaft, hole processing material selection and heat treatment, must according to the bearing and shaft running environment and load conditions, to ensure sufficient strength and rigidity. （ 5) Strengthen the daily maintenance of bearing, found to have abnormal situation, must not take disease persistence, check processing. A: on site operation can repair under the thin wall bearing such a: high speed wire rod rolling mill bearing's advice