Motor bearing high temperature root cause and solution

Bearing as one of the important parts, inside the motor bearing speed will directly affect the performance of motor with low speed motor, high temperature too high will lead to motor burn out the machine, the bearing network according to the understanding of motor bearing, to tell you that in general, is refers to the rolling bearing overheating temperature rise more than 55 ℃, sliding bearing temperature rise of more than 40 ℃. The root cause of the motor bearing temperature is too high and the solution: 1, the rolling bearing installation is not correct, fit tolerance too tight or too loose. Rolling bearing performance depends not only on the manufacturing precision of the bearing itself, but also depends on a matching shaft and hole size precision, surface roughness, geometric tolerance and as well as the selection of matching and correct installation. In general horizontal motor assembly good rolling bearing only bear radial stress, but if the bearing inner ring and the shaft with a tight, or bearing outer ring and cooperate too tight end cover, the program when the interference of the assembled bearing gap is too small, sometimes even close to zero. In this way, the rotation is not flexible, produces heat in the operation process. If the bearing inner ring and shaft with too loose, or bearing outer ring and cooperate too loose end cover, bearing or bearing outer ring and inner ring on the shaft end cover relative rotation, lead to bearing friction heat and overheating. In general, as a reference parts of bearing inner ring diameter tolerance zone move below zero in the standard. Tolerance zone of the same shaft and bearing inner ring and the mixing proportion of tolerance zone with the general reference hole is much more important. 2, the selection of grease or improper maintenance, poor quality of grease or deterioration, or mixed with dirt and impurities, can cause bearing heating. Too much or too little can also cause bearing grease fever, because too much grease bearing rotating part and grease causes larger friction, while too little grease can cause dry friction and heat. So we must adjust the amount of grease, making them approximately 1/2 - bearing chamber space volume 2/3. Should be clean inappropriate or bad grease, with appropriate and clean grease replacement. 3, motor bearing cover and cylindrical roller bearing between the axial clearance is too small. General in the large and medium-sized motor shaft extension end use ball bearing. Use roller bearing shaft extension end, make the rotor heat expands out freely. Because on both ends of small motor use ball bearings, bearing cover and the bearing outer ring should have proper clearance, otherwise the bearing may be due to the axial heat extension of excessive and heated. Appear this kind of phenomenon, should be before and after removal of the bearing cover, or between bearing cover and the end cover with a thin pad, formed between the outer bearing cover and the bearing outer ring enough clearance. 4, on either side of the motor end cover or bearing cover installation is not correct. If the motor end cover or on either side of the bearing cover not parallel installation or block does not stop, turn out of orbit and the club to generate heat. End cover or on either side of the bearing cover must be installed to level off, and rotate uniformly bolted. 5, ball bearing, roller, inside and outside the ring, ball bearing severe wear or metal flake. At this point should be replaced. 6, connected to the loader. Including: poor coupling assembly, belt tension is too large, the load machine axis of different bearing, pulley diameter is too small, hypertelorism, axial and radial load is too large. Correct connection, avoid abnormal bearing force. 7, shaft bending. At this point, the shaft of the bearing force is no longer a pure radial force, thus causes a bearing heating. Try to bend the shaft straightening or get a new one. 【 Warm prompt. 【 The bearing network] Some information from the Internet, and strive to secure timely, accurate, aims to deliver more information, does not represent our views to its approval or responsibility for their authenticity. If this net reprint information involves the issues such as copyright, please contact with this net. Tel: 0571 - 81630205. Tags: production and processing