1, TIMKEN bearing the shaft and the bearing housing tolerances choice and control: TIMKEN bearings are pressed into block after no sense should be flexible rotation. If significant rotation is not flexible, it indicates that the shaft size is too large, tolerance to downward. Such as bearings pressed into the shaft turned by hand obvious "imperfections" sense, it may be too much tolerance of the shaft or shaft roundness bad. So good control shaft and the bearing housing tolerance should also control the roundness, many domestic manufacturers only tolerance control, no roundness control.
2, TIMKEN bearing assembly methods: Because bearings are precision products, such as improper assembly is very easy to damage the bearing channel, leading to bearing damage. Bearing in the assembly should have a dedicated mold and can not beat the pressed into the shaft when the force only a small circle, the circle can only push a large circle force. Assembly requires the use of pneumatic or hydraulic, press-fit upper and lower mold to remain outside the state level, if inclined bearing channel will lead to damage due to power, leaving the bearing guide ring.
3, the assembly to prevent foreign bodies: TIMKEN bearings mounted to the rotor can easily do balancing balancing generated when the iron filings into the TIMKEN bearings inside, so it is best to do before loading the bearing dynamic balancing. There are some manufacturers in order to facilitate assembly, the assembly in the bearing chamber coated with some oil or grease lubricant effect, but the operator is often difficult to control the amount, if the oil or grease in the bearings TIMKEN indoor accumulates more in the bearing rotation easily along the shaft into the bearing. Bearing chamber preferably not coated with oil or grease, such as non-coated bearings shall not be have to control indoor accumulates.
4, paint rust prevention: paint rust characterized by multiple in sealed-type motor, motor in the assembly sounds good, but put in the warehouse for some time, the motor becomes very abnormal sound, remove TIMKEN bearings severe rusting. Many manufacturers will be considered a bearing problem, through our continuous publicity, and now the motor plant has been realized mainly insulating paint problems.
The problem is mainly because the insulating paint out of the volatile acidic substance at a certain temperature, humidity, the formation of corrosive materials, the corrosion TIMKEN bearing channel leading to bearing damage. The problem can only be a good selection of insulating paint, and after a period of time after drying ventilation assembly. TIMKEN bearing life is associated with manufacturing, assembly, use all closely related, must make every link in order to make the bearing in the best operating condition, thus extending the life of TIMKEN bearings. TIMKEN bearing fatigue life calculation based on fatigue life of the delineation, the inner ring or shaft rotation (in this case, the outer ring or the seat is fixed) is delineated, with the total value of the transfer of the total transfer value. Move the bearing fatigue life testing procedures, scale testing methods), used in the test machine functioning as a way to meet the requirements delineated, TIMKEN bearing fatigue life testing the number of samples, the test data obtained from actual test subsistence, which is said bearing fatigue life testing revealed the theme. Bearing fatigue life test is adequate lubrication to maximize inhibition move bearing wear, and increased capacity and speed, with projections
TIMKEN bearing fatigue life factor enhanced fatigue test method. TIMKEN bearing fatigue life calculation and fatigue life tests are complementary, two results are sufficient correspondence. In fact, if every detail use, and has taken a number of full TIMKEN bearing life test to verify the suitability of the selected bearing in the economy of time and labor, and therefore, the bearing life test method is necessary or important that in most cases, in the case before use, a scaling method of calculating the estimated life Swedish TIMKEN bearing life, there is adequate level of reliability.
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