tailieunhanh - Rolling Bearing Damage 2009 Part 3

Tham khảo tài liệu 'rolling bearing damage 2009 part 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Symptom Typical causes of rolling bearing damage Operational stress Environmental influence Lubrication Load too high or too low Vibrations High speeds Dust dirt Aggressive media water External heat Current passage Unsuitable lubricant Insufficient lubricant Excess lubricant a Unusual running behaviour Uneven running Unusual noise Disturbed temperature behaviour b Appearance of dismounted bearing parts 1 Foreign particle indentations 2 Fatigue 3 Stationary vibration marks 4 Molten dents and flutes 5 Skidding 6 Rolling element indentations scuffing 7 Seizing marks 8 Wear 9 Corrosion 10 Overheating damage 11 Fractures 12 Fretting corrosion false brinelling 13 I FAG Evaluation of running features and damage to dismounted bearings Measures to be taken Measures to be taken Marking separate parts When there are several bearings from the same type of bearing location number all bearing parts and keep a record of their arrangement in the location. Mark lateral arrangement of bearing parts to one another and in their mounting position. Mark radial mounting direction of the rings with regard to external forces. Measurements taken with complete bearing Noise inspection Inspection of radial axial clearance Inspection of radial axial runout Inspection of frictional moment Dismantling bearing into separate parts Determine grease quantity if grease has escaped from sealed bearings. Remove dust shields and seals carefully from sealed bearings avoiding deformations as much as possible. Assess grease distribution in the bearing. Take grease sample take several samples if there is an irregular lubricant pattern. If dismounting cannot be nondestructive those parts which are assumed to have had no influence on the cause of damage should be destroyed . cut or turn off the retaining lip at the small cone diameter of tapered roller bearing . Should damage be inevitable during the dismounting procedure it should be marked and taken note of. Assessment of .