If the selection TIMKEN bearing of extreme speed speed can not meet the application requirements, can be made some improvement measures to improve the technology, in order to achieve a satisfactory requirements. Such as improving bearing tolerance level; Suitable enlargement of clearance; Switch to special materials and improve keep shelf structure; Change the lubrication methods, such as the oil and gas, oil mist and injection lubrication; Improved cooling conditions and so on.

(1) the rolling bearing way voice and control method is rolling say when Angle contact ball bearing operation, its rolling rolling rolling on the way in body sends out one kind of gliding continuous voice, is rolling bearings can happen all the basic characteristic of sound. The general is rolling bearing sound is way voice and other sound. The ball bearings rolling say is irregular, frequency in 1000 Hz above, its main frequency not with engine speed and change, but its total pressure level with the speeding up of the speed increases. Roll say big TIMKEN bearings, and its groove of sound pressure level with viscosity decreased; And roll say small bearings, and its pressure level in viscosity increases to about 20 was/s above, by reducing and to increase somewhat. The greater the rigidity of the bearing, roll say the total pressure level is lower. Such as radial clearance is too small, roll say the total pressure level and the main frequency will be as radial clearance decreased sharply increase. Roll control the way voice method: choose low noise bearing namely striation small bearing, deliberate choice use conditions. Roll say often affect the entire machine noise, reducing groove sound can reduce the noise of the machinery.

(2) the impact of the roller sound and control method of the larger type ball bearings or cylindrical roller bearing in pure radial load when a low speed, because of the roller centrifugal force is small, the load in the rolling body will impact maintains a or groove and making noise. But with the speed increase, the noise will disappear. The impact of roller sound control method are: reduced radial clearance, use a reasonable structure and material of sex and maintains a bearings.

(3) the rolling bearings rolling sound and control method is run over rolling sound Angle contact ball bearing in all cases it could have happened to harsh metal friction sound, occurs mostly in the larger type bearing grease lubrication, and in the performance degradation of oil complexes are more likely to happen, in oil lubrication almost does not occur. In addition, in winter are easy to occur, when subject to pure radial load, in radial clearance great occasion easy to occur, and with the different size, in a particular speed range easy to happen, not only will continuously happen and will appear intermittently. Foreign circle groove adopt the special processing method can prevent the emergence of rolling rolling sound and, when necessary, can choose the bearing, or reduced TIMKEN bearing radial clearance, use the good performance of grease and improve and bearing match the rigid parts.

Therefore, only survey bearing damage, it was hard to know that the real cause of the damage. But, if know the use of machinery, bearing conditions of use, bearing the structure, around about accidents of the situation before and after, combining bearing damage status and several reasons investigation, it can avoid the same accident happen again.

The judge spherical bearing can use again, according to the Angle contact ball bearing the damage degree, mechanical properties, importance, operation conditions, check cycle factors related to decide. But when the examination if found to have the following defect, the bearing can't continue to use, the need to change new bearing.

(a) inner ring and outer, rolling body, maintains a random a crack or gap.

(b) rings, arbitrary roller has a fracture.

(c) rolling face, raised edge, rolling elements are clearly scratches.

(d) maintains a wear obvious, or rivets obvious loose.

(e) groove surface, rolling body is rust or scars.

(f) groove surface, rolling elements have serious creasing or collision.

(g) inner circle diameter or outer diameter face on the creep significantly.

(h) in overheating and obvious change color.

(I) the sealing grease of Angle contact ball bearing, sealing ring or dust cover seriously damaged.



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