Timken bearing fault feature to demonstrate serious failures (typically, such as bearing damage, Burns, Sha spallation, Raceway, wearing beads) when not more than one week, equipment, larger, faster, shorter time intervals. Therefore, the actual bearing fault diagnosis, finding fault, its advanced features, should decisively determine the spherical roller bearing failure, repair as soon as possible.
1, selection and control of shaft and housing tolerances: after the bearing pressed into the Timken bearing should rotate flexible non-blocking. If there is a clear turning not flexible, it indicates that the axis dimensions are too big, tolerance to downgrade. Spherical roller bearings are pressed into the shaft by hand after turning the obvious "rustling", the tolerances of the shaft may be too large or the roundness of the shaft well. So in the control shaft and housing tolerances, to control the roundness, at present, many manufacturers to control the tolerance, not to control the roundness.
2, bearing Assembly methods: because the bearings are high-precision products, such as improper Assembly can easily cause damage to the bearing Raceway, cause bearing damage. Spherical roller bearings in the mould of the Assembly should be given special, not free to strike, only small forces when pressed into the shaft, pressure only when large washers. Assembly requires the use of pneumatic or hydraulic, pressure mode when external to the level of State, such as the tilt causes the Timken bearing raceways due to mechanical damage, while cooling the bearing rings.
3, Assembly of foreign body to prevent: bearing mounted on the rotor's dynamic balancing is easy to move when balancing occurs when iron filings into the bearing, so it is best to be loaded before bearing dynamic balancing. Some manufacturers to assemble, Assembly in room coated with oil or grease lubrication effect, but operators are difficult to control, indoor accumulates more if oil or grease in the bearings, spherical roller bearings rotate easily along the shaft into the Timken bearing. Room it is best not to oil or grease the bearing, if not not to control shall not be coated in bearing Interior accumulates.
4, painted Rust prevention: paint-rust is characterized by multiple sealed motor, motor Assembly has a good voice, but after some time in the warehouse, much of the abnormal noise of motor, remove the bearing with serious rust. Many manufacturers are considered to be before bearing problems, through our continuous publicity, motor works have been realized largely insulated paint problem now. Insulating varnishes containing the problem is because of volatile acid in formation under certain temperature, humidity, corrosive substances, corrosion, which cause Timken bearing Raceway spherical roller bearings are damaged. That there can only be a good selection of electrical insulating varnishes, and after drying, ventilation Assembly over time.
We should cause us to be a defect in this and other national guard bearing components, failure is often very fast, very suddenly. Considered to be two hours after the digital measurement of rotor shaft end example.
These counterfeits bearing fault diagnosis, we should pay attention to time-domain spectroscopy of Timken bearings are usually of high quality equipment and vibration conditions, such incidents on the spectrum of abnormal accumulation of normal, to promptly determine when spherical roller bearing failures, avoid equipment accident.
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