KOYO import bearing preload fault inspection methods

KOYO import bearings, in most cases, the working status: use proper clearance. According to different purposes, and in the bearing, bearing in advance, make the internal stress, makes the negative bearing clearance is used, this method is called using preloading. More appropriate, such as the angular contact ball bearing, tapered roller bearings, two families use bearing, bearing clearance, can be adjusted. 1 the main purpose of the preload: the main purpose of the preload, would it be possible for some typical examples, the examples to prove: ( 1) In the right direction and the radial position of the axial direction of the decision of the shaft, inhibit beating axis. ( 2) Increase the bearing rigidity. Machine tool spindle bearings, ride a bike with small agent bearing gear differential. ( 3) To prevent the vibration of the different sounds and axial direction of the resonance. A small motor bearings. ( 4) Inhibition of rolling rotary sliding, sliding and rotating revolution slides. High speed rotation center of the thrust bearing, thrust ball bearings. ( 5) , ring, keep the position of the scroll right. Thrust ball bearing, spherical roller thrust bearing, and the horizontal axis. 2 preloading method: in the early period of the load positioning is KOYO import bearing shaft relative position, in use will not change the preload method. An example: (below 1) In order to implement the width or bearing axial clearance between preload after tighten before the adjustment method of difference. ( 2) Adjust the size of the mat, gaskets, bearing preload, to give way. ( 3) Tighten the screw axis can be adjusted, nut after clearance, adopted by the method. In this case, with proper preload, to determine the start hand side friction torque adjustment. The so-called pressure constant is the use of helical spring pretightening, disc spring, give appropriate preparation method of the bearing. When use, even though the KOYO import bearing changing the relative position, loading method in advance. When used, it will even the change of relative position, preload can maintain. Use after xie used engine oil, engine oil lubrication bearing if possible, should be impregnated with fresh oil and let the machine in low speed rotation for a few minutes. As far as possible make the oil collecting residual pollutants, and then purging in addition to the oil. Note: the oil before use it's best to filter it. And the use of grease lubrication bearing in replacing grease, Joe used in addition to the device should be avoided with any part of the cotton material come into contact with the bearing. Because these residues fiber may wedged in between the scroll and damage, especially the application of small bearing more need to pay attention to this problem. Check the KOYO import bearings, don't let the bearing exposure to pollutants or moisture environment. If the job is interrupted, should with oil or similar materials cover paper plastic film machine. 1, tile surface corrosion: spectrum analysis found that non-ferrous metal element concentration anomaly; Iron spectrum appeared a lot of non-ferrous metal components in sub-micron wear particles; Lubricating oil excess moisture, acid value exceeds bid. 2, a shaft neck surface strain: iron spectrum have iron series cutting grinding grain or black oxide particles, metal surface heat tint. 3, shaft neck surface corrosion: spectrum analysis found that iron concentration is unusual, there are a lot of iron in iron spectrum of submicron particles, water or high acid value oil paint. 4, surface strain: iron spectrum found cutting abrasive, abrasive ingredients for non-ferrous metal. 5, tile back micro wear: spectrum analysis found that iron concentration is unusual, there are a lot of iron in iron spectrum wear submicron particles, lubricating oil moisture and acid value anomalies. Under the condition of fluid lubrication, sliding surface is lubricating oil without direct contact, also can greatly reduce the friction loss and wear of surface oil film also has a certain vibration absorbing ability.