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Spherical roller bearing fault maintenance
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| Time：2017.08.12 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
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Spherical roller bearing fault maintenance
In the use of self-aligning ball bearings, usually there will be some faults, for example, bearing damage, burns, sand spallation, raceway, bead etc.. Bearings are the main parts of machinery. How can we maintain and repair them?
1, shaft and bearing room tolerance selection and control: bearing into the bearing should be flexible rotation, no blocking. If the rotation is not flexible, the size of the shaft is shown to be too large and the tolerances should be lowered. Such as spherical roller bearing onto the shaft by hand after rotation obviously "rustle" sense, the tolerances of the shaft may be too large or the roundness of the shaft well. Therefore, in the control of shaft and bearing room tolerance, but also to control the roundness, at present, many domestic manufacturers only tolerance control, there is no control of roundness.
2, bearing assembly methods: because bearings are high precision products, such as improper assembly, it is easy to damage to the bearing channel, resulting in damage to bearings. Spherical roller bearings in the assembly should have a dedicated mold, can not beat, in pressing axis only small force, only large force pressing circle. When assembling, the air pressure or hydraulic pressure is required, and the upper and lower die shall be out of the horizontal state when the press is installed. If there is an inclination, the bearing groove will be damaged by the force, and the bearing will lead to noise.
3, assembly of foreign objects to prevent: Bearing in the rotor to do dynamic balancing, it is easy to balance the iron filings when the dynamic into the bearing, so it is best to install the bearings before the dynamic balance. Some manufacturers for ease of assembly, assembly of some oil or grease lubrication effect in the bearing house painted, but often the operator is difficult to control, if the oil or grease in the bearing chamber accumulates more, in spherical roller bearings along the axis rotates easily into the internal bearing. Bearing room is best not to oil or grease, such as non coating can not be controlled, not in the bearing room has deposited.
4, to prevent rust paint: paint rust is characterized by multiple sealed type motor, the motor sound in the assembly is very good, but in the warehouse put some time after the motor noise change greatly, remove the bearing with serious rust. Previously, many manufacturers will think that the problem of bearings, through our continuous publicity, now the motor plant has been aware of the main problem of insulating paint. This is mainly because the acid insulating paint volatilization of the formation of corrosive substances under certain temperature and humidity, the bearing groove corrosion and cause damage of spherical roller bearing. The problem is only a good choice of insulating paint, and after drying for a period of time after the installation of ventilation. |
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