tailieunhanh - Rolling Bearing Damage 2009 Part 4

Tham khảo tài liệu 'rolling bearing damage 2009 part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Evaluation of running features and damage to dismounted bearings Pattern of rolling contact 25 Radial load of a radial bearing . deep groove ball bearing. Under point load and with a sufficiently rigid housing the track on the stationary ring is shorter than half the raceway circumference in so far as there is no radial preload. Under circumferential load the track spreads over the entire raceway circumference. a Point load for the outer ring circumferential load for the inner ring b Point load for the inner ring circumferential load for the outer ring P P nA nA rotating inner ring constant load direction rotating inner ring circumferential load direction rotating outer ring circumferential load direction rotating outer ring constant load direction 25a 25b 26 Axial load of a radial bearing . deep groove ball bearing. On the inner and outer rings the tracks spread off-centre over the entire raceway circumference. The arrangement of the tracks is based on the direction of the external load and the cycling conditions point load or circumferential load axial load combined load figs. 25 to 27. A targetactual comparison would also reveal important information on unexpected load conditions . a disturbed floating bearing function. In the case of radial load exclusively the origination of tracks in circumferential direction on the stationary ring depends mainly on the amount of load the size of the bearing clearance and the rigidity of the mating parts. The greater the load and smaller the clearance as well as the softer the housing the longer the load zone is and thus the track also. 27 Combined radial-axial load of a deep groove ball bearing. In the case of the inner ring circumferential load there is a constant wide track over the entire raceway circumference. The track on the outer ring point load is wider in the radial load zone than on the rest of the circumference. FAG I 20 Evaluation of running features and damage to dismounted bearings Pattern of rolling .