Koyo bearing normal maintenance to avoid failure of two ways

You first need to stress is that it is important to keep the bearing lubrication and clean. So when we inspection on koyo bearings before, should first clean the surface of bearing, and then remove the perimeter of the bearing parts. Everyone should pay attention to, oil seal is very fragile parts, this in the check and need to be careful, when disassembling do not excessive force, so as not to cause damage to parts. And careful check of the bearing oil seal and its surrounding parts, if has presented the adverse symptoms, be sure to replace, and bad seal will cause damage to the bearing cloud caused by abnormal equipment downtime. Second, we will also examine koyo bearing lubricant. Lubrication is very important, not just for bearing, also for all of the bearing. But please note that the bearing should not add too much grease. Check of bearing lubricant method is: with little lubricant in friction between two fingers, and if the presence of pollutants, can be felt; Or in the back of a thin layer of lubricant, then seal of inspection. And then replace the bearing lubricant. 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 joint Angle of cotton into 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. Finally, it is important to note covering exposed bearing. Check the bearing, don't let bearing exposure to pollutants or moisture environment. If the job is interrupted, should with oil film, paper or similar material by machine. If don't have to remove and may perform inspection of cleaning without masking of bearing, to coating with brush with petroleum solvent ( whitespirit) Cleaning and dry with a lint-free cloth or with compressed air to blow dry, Be careful not to let the bearing component starting rotation) 。 With a little mirror, and the probe used in the similar to the dentist to check the bearing of the orbit plane, retainer and beads. Do not clean the encrypted block or dust bearing; You just wipe the outer surface. If the bearing is need to replace damaged situation. During regular maintenance downtime time replacement bearings than the array bearing damage of selected into a sudden stop loss is much more economical one. Adhesive and abrasive wear failure of adhesive and abrasive wear failure of koyo bearing surface is one of the most common failure mode. Bearing parts between the relative sliding friction causes the surface of the metal loss known as sliding friction losses. Continue to wear will make the parts size and shape change, bearing fit clearance increases, working surface morphology becomes bad, thus loss of rotating accuracy, bearing cannot work normally. Sliding wear forms can be divided into the abrasive wear, adhesive wear and corrosive wear and fretting wear, etc. , one of the most common for abrasive wear and adhesive wear. Bearing parts of the friction surface between the friction caused by external grinding hard particles or metal surface wear phenomenon belongs to the abrasive wear. It is often in the bearing surface caused by chisel cutting type or furrows type of scratches. External hard particles often come from the dust in the air or the impurity in the lubricant. Adhesion wear is mainly due to the friction surface peak friction surface is uneven, the outline of local friction heat make friction surface temperature, lubricating film rupture, serious when surface layer of metal will be partial melting, produce adhesive contact point, avulsion and adhesion of circulation process, serious when cause friction welded and stuck below. 2. Contact fatigue, Fatigue wear) Failure of contact fatigue failure is one of the most common failure modes of all kinds of bearings, koyo bearing surface is the repeated effect loop contact stress and failure. Bearing parts surface contact fatigue spalling is a fatigue crack in the process of crack initiation and extension. Initial contact fatigue crack first from the maximum orthogonal shearing stress under contact surface, and then extended to form a hemp dot spalling or small exfoliate, the former is called pitting corrosion or pitting peeling; The latter is called the shallow flaking. Such as the initial crack on the border of hardening layer and the core area, caused the early spalling of hardening layer, it is called a hardening layer peeling off.