Transmission TIMKEN bearing failure analysis - bearing on knowledge

TIMKEN bearing fault on transmission phenomenon: sound transmission gear meshing, TIMKEN bearings, sound operation, such as the noise is too big; Transmission from dry grinding impact such as abnormal sound. Reason: rolling TIMKEN bearing oil deficiency ( Before the first axis TIMKEN bearing) , loss to round steel ball mill, pitting, delaminating, scars, both inside and outside groove on the shaft or casing rotation, or TIMKEN bearing gap is too big. Excluding method is: add oil, to replace the damaged TIMKEN bearing; Gear machining precision or improper heat treatment technology of gear yawing or tooth shape change. Elimination method is: the replacement of damaged gear; The backlash is too large or spline fit clearance is too large. Elimination method is: the replacement of damaged synchronizer hub and shaft; Repair of tooth surface without burr, bumps, etc for finishing. Elimination method is: repair tooth surface; Tooth surface spalling, delaminating, defects, wear gear does not change in pairs or even in a fix. Elimination method is: the replacement of damaged gear; The first axis, the second shaft bending deformation. Elimination method is: the replacement of the deformation of shaft; Shell TIMKEN bearing hole boring set set of repair, make the two hole center distance change or make two axis is not parallel. Elimination method is: the replacement of damaged casing; After repair of the fork camber is wrong or fork wear after the single side welding is too thick, the related gear position is not allowed. Elimination method is: change the fork; The second shaft fastening nut loose or other each shaft axial positioning phrase. Elimination method is: reassemble; Self-locking device groove, steel ball wear or even self-locking spring fatigue, broken, cause shift offside. Excluding method is: change the fork shaft, ball or spring; Individual tooth fracture. Elimination method is: the replacement of damaged gear; Gear oil shortage, metamorphism and specifications do not conform to the requirements or impurities in the oil. Elimination method is: add or replace conform to the requirements of the oil. TIMKEN bearing load capacity than the same volume of sliding TIMKEN bearing much smaller, therefore, TIMKEN bearing radial size large. So, under heavy load situations and demands radial size, structure compact occasions (such as internal combustion engine crankshaft TIMKEN bearing) , use slide more TIMKEN bearing; Particularly sensitive to scrap metal and other foreign bodies, TIMKEN bearing TIMKEN bearings once in foreign body, can produce bigger vibration and noise in an intermittent, also can cause early damage. In addition, TIMKEN bearings due to metal inclusions and is also the possibility of early damage. Even if they don't happen early damage, TIMKEN bearing's life also to have certain limit. All in all, TIMKEN bearing life is sliding TIMKEN bearing shorter. However, compared with the sliding bearing TIMKEN TIMKEN bearing, each have advantages and disadvantages, each has certain applicable occasions, therefore, they cannot fully replace each other, however, due to the prominent advantages of TIMKEN bearing, at present, TIMKEN bearing has developed into a main pattern of the machinery, more and more widely applied.