KOYO thrust ball bearing failure cause analysis method

Bearing is available judgment, mainly considering KOYO bearing damage degree, mechanical properties, importance, and operating conditions, to the next overhaul period. If there are the following defects can't use, must replace the new thrust ball bearing. Inner ring and outer ring, rolling element and cage on any one have crack or gap. 1, ring, rolling body fracture on any one. 2, rolling on the pavement, guard, rolling body CARDS have a significant injury. 3, keep wear significant or rivet significant relaxation. On page 4, raceway and rolling body rust, injury. On page 5, raceway and rolling body severe creasing and mark. 6, inner ring diameter or outer diameter surface has obvious creep. 7, due to the hot color change is obvious. 8, the bearing grease sealed, sealing ring or dust cover breakage is obvious. KOYO bearing failure is often the cause of many factors, all the influence factors of design and manufacturing process will be associated with the failure of bearing, the analysis is not easy to judge. In general, generally can be used from the two aspects of factors and internal factors considered and analyzed. Race with all sorts of KOYO bearings and rolling friction is rolling bearing inherent noise, raceway is by the elastic properties of the rolling element and raceway contact, when the thrust ball bearing rotating roller rolling over on the rolling path of a continuous and a sophisticated sound; Abnormal sound of rolling friction can be issued a 'tickle, tickle' uncomfortable metal friction abnormal sound, smooth and good, won't make such a sound. So in normal condition is not a problem, as long as the noise increased after must pay attention to. About various thrust ball bearings are exist. When the rolling bearing raceway appearance or table in vitro was bruised, pit, rust, then you will have certain periodic noise and vibration. When bearing in operation will produce contamination noise have dust intrusion. This noise is cyclical, also with vibration, its sound size is not fixed, sometimes no. Processing, step down tight sleeve, readjust the matching of the shaft and the inner ring tightness, replace the bearing after the clearance from 0. 10mm。 To restart the installation fan, thrust ball bearing vibration value and operating temperature back to normal. Bearing internal clearance is too small or poor parts design and manufacture of precision, are a major extension bearing operating temperature on the high side, for the convenience of the fan equipment installation; Repairing and maintenance. Commonly used more on the design of set set of bearing inner ring with tapered bore the bearing bearing, but also easily because of the negligence of the installation program problem. Especially the adjust of the appropriate clearance. Thrust ball bearing internal clearance is too small. Operating temperature rise sharply: tapered bore the bearing inner ring is too loose and set fit, KOYO bearing because of loose fitting surface occurs easily and failure loss in a short period.