轴承常见失效形式ppt课件.ppt
Trouble Shooting轴承故障检修,Bearing,Load/Contact Patterns负荷/接触痕迹,Typical Running Traces of Deep Groove Ball Bearings深沟球轴承的典型运行痕迹,(a) shows the most common running trace generated when the inner ring rotates under a radial load only. （e）所示为轴承内圈旋转仅受径向负荷时最常见的正常运行痕迹。(e) through (h) show different running traces that result in a shortened life due to their adverse effect on bearings. （e）（h）所示的轴承运行痕迹是由于轴承遭受不良影响所致，这类情况往往会导致轴承实际使用寿命的降低。,Click on a picture to enlarge it,Typical Running Traces of Roller Bearings滚子轴承的典型运行痕迹,(i) shows the outer ring running trace when a radial load is properly applied to a cylindrical roller bearing which has a load on a rotating inner ring. (j) shows the running trace in the case of shaft bending or relative inclination between the inner and outer rings. This misalignment leads to the generation of slightly shaded (dull) bands in the width direction. Traces are diagonal at the beginning and end of the loading zone. For double-row tapered roller bearings where a single load is applied to the rotating inner ring, (k) shows the running trace on the outer ring under radial load while (I) shows the running trace on the outer ring under axial load. When misalignment exists between the inner and the outer rings, then the application of a radial load causes running traces to appear on the outer ring as shown in (m).,Click on a picture to enlarge it,Damage Types & Causes轴承损伤类型及其原因,Damage Types & Causes轴承损伤类型及其原因,In general, if rolling bearings are used correctly, they will survive to their predicted fatigue life. Bearings, however, often fail prematurely due to avoidable mistakes. The causes of, this premature failure include improper mounting, mishandling, poor lubrication, entry of foreign matter or abnormal heat generation.For example, one cause of premature failure is rib Scoring which is due to insufficient lubrication, use of improper lubricant, faulty lubrication system, entry of foreign matter, bearing mounting error, excessive deflection of the shaft or some combination of these. If all conditions are known for the times both before and after the failure, including the application, the operating conditions, and environment, then a countermeasure can be determined by studying the nature of the failure and its probable causes. A successful countermeasure will reduce similar failures or prevent them from happening again.Examples of bearing damage and countermeasures are presented in the following sections. Please consult these sections when trying to determine the cause of bearing damage.,Flaking 剥落,Flaking 剥落,Click on a picture to enlarge it,Peeling 剥皮,Click on a picture to enlarge it,Scoring 擦伤,Scoring 擦伤,Click on a picture to enlarge it,Smearing 污损,Smearing 污损,Click on a picture to enlarge it,Fracture 破裂,Click on a picture to enlarge it,Cracks 龟裂,Cracks 龟裂,Click on a picture to enlarge it,Cage Damage 保持架损坏,Cage Damage,Cage Damage 保持架损坏,Click on a picture to enlarge it,Denting 压痕,Denting 压痕,Click on a picture to enlarge it,Pitting 蚀损斑,Click on a picture to enlarge it,Wear 磨损,Wear 磨损,Click on a picture to enlarge it,Fretting 微振磨损,Fretting 微振磨损,Click on a picture to enlarge it,False Brinelling 摩擦腐蚀压痕,False Brinelling 摩擦腐蚀压痕,Click on a picture to enlarge it,Creep 蠕动磨损,Creep 蠕动磨损,Click on a picture to enlarge it,Seizure 咬卡,Seizure 咬卡,Click on a picture to enlarge it,Electrical Corrosion 电腐蚀,Electrical Corrosion 电腐蚀,Click on a picture to enlarge it,Rust And Corrosion 锈蚀,Rust And Corrosion 锈蚀,Click on a picture to enlarge it,Mounting Flaws 安装伤痕,Mounting Flaws 安装伤痕,Click on a picture to enlarge it,Discoloration 褪色污点,Discoloration 褪色污点,Click on a picture to enlarge it,
