2013年8月10日星期六

Crossed roller bearings how to adjust in order to achieve the best results

Bearing is the basis of the quality of its own, through the bearing steel, cross roller bearing and crafts strict customs, the production out of the bearing quality is absolutely the best. But why will still see some of the questions about the damage it? This is mainly because the use of inattention caused, not seen since the bearing itself quality problems caused.
Through a combination of bearing failure and deterioration, performance status parameters to determine and predict the reliability and performance of the bearing, the site of the abnormal situation, causes and degree of risk identification and judgment to decide restoration and improvement of the integrated technology. Therefore, the bearing fault diagnosis technology is not a simple fault detection (or monitoring) technology, nor is it a simple point inspection instrumentation. Correctly, quickly and effectively signal acquisition, data processing, manual or automatic identification and judgment. In order to determine the scientific repair cycle, the mechanism should be based on various types of failure, fatigue, wear life tests and estimates necessary.
1, the shaft and the bearing housing tolerances choice and control: after pressure block has no bearing swivel sense of flexibility. If significant rotation is not flexible, then the shaft size is too large, and decreased tolerance. Such as bearings pressed into the hand after the obvious "imperfections" in a certain sense the steering shaft, it may be too round shaft or shaft tolerance is not good. A good shaft and bearing tolerances in the control room, so it should be controlled roundness.
2, the bearing assembly mode: Because bearings are precision products, such as improper assembly, easy to damage the channel bearings, resulting in bearing damage. Bearing in the assembly, there should be a special mold, can not beat, pushing the axial force can only be a small circle, the press force only when the circle. Assembly requires the use of pneumatic or hydraulic crimping die down when outside the country level, if the channel slope will lead cross roller bearing damage due to power, leaving the production of bearing guide ring.
3, the assembly to prevent foreign bodies: Bearing mounted rotor balancing is very susceptible to the iron homeostasis Before installing the bearings, so it is best to do balancing. Bearing in the conference room to put some oil or grease lubrication, but operators often difficult to control the amount of oil or grease the bearings if the plot to stay indoors, it's easy to rotate along the axis cross roller bearing. Bearing chamber is preferably not coated with oil or grease, such as non-coated control, without bearing to stay indoors.
4, paint rust prevention: paint rust is featured in a sealed motor, in the General Assembly multiple motors sounds good, but after a period of storage, the motor becomes a very unusual sound, remove the bearing severe rust. Many manufacturers will be considered before the cross roller bearing problems, now the main electrical plant has been aware of the problem of varnish. The main problem is that out of the insulating paint volatile acid at a certain temperature, humidity, corrosion and protection of metals, formation of corrosive substances, channels skf bearing cause corrosion damage. The only problem now is to choose a good varnish, dry air for some time after assembly.
5, the bearing life is the manufacture, assembly, use is closely related to every aspect must be made in order to make the best functioning of the state of the bearing, thus extending the service life of cross roller bearings.

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