simple diagnostic introduce locomotive rolling bearings and precision diagnostics industry 双列角接触球轴承|3056轴承-pg电子官方网站

locomotive bearing as main components , in particular traction motor , axle box bearings , its function on the safe transport plays an important role , when run on a motorcycle online , once the bearing failure will result in the entire trains can not run , blocking transport positive line , especially the failure of the passenger train , the negative impact is even greater , but once the locomotive bearing failure on the locomotive repair is very difficult, to prevent and reduce the incidence of motorcycle bearing failure , for the safe transport of the locomotive is very important , the bearing can before loading will have hidden faults detected bearings , bearing accessories to ensure qualified car is the focus of this article discusses .
2 bearing failure
serious damage to the bearing is often not a single cause, but under the combined effects of several aspects , creating a vicious circle in harsh operating conditions , leading to severe burning of the bearing, so after the accident, it is often difficult to judge by the due to any reason , we will formulate relevant measures to bring some difficulties for the discussion, starting with the analysis of several aspects of bearing failure causes.
abnormal wear of bearings 2.1
2.1.1 when the period of use of the bearing , the bearing inner ring, the rolling body cage, outer ring , roller , etc. have some defects , injuries , resulting in poor lubrication of the bearing , causing the bearing heat , prolonged fever , will leads to: ( a ) diluting the bearing lubricating oil. ( 2 ) the acceleration of material fatigue , decrease in hardness. for these reasons, further creating a vicious cycle , leaving the bearings overheat accelerate burning . serious displacement of the bearing inner ring , rolling out of round , shock and heat, the final weld together. therefore, when run on a line , if found bearing severe fever, smoke , do not stop, and run to the front of the station should be maintained because of overheating bearings in a molten state at the moment , once again unable to walk after parking the cooling plug positive line .
2.1.2 oil locomotive bearing maintenance is very important, especially the right amount of oil to the bearing to ensure good bearing lubrication, lack of oil and fuel are also very likely to cause excessive bearing failure , oil plus less likely to cause bearing poor lubrication and heat, cadogan also likely to cause a stir overheating , so the maintenance of the oil should be appropriate to also clean the bearing grease is also very important, once oils fall into other impurities and moisture will affect the normal tour gaps and build the necessary film .
2.1.3 prolonged use of bearings , bearing life and more than likely to cause material fatigue , coupled with a strong impact on the role of leaving the material deformation , making the roller raceway peeling , pearling , resulting in poor lubrication and vibration increase .
2.2 installation influence on bearing
2.2.1 with the gap of the bearing inner ring and the shaft does not match the amount of interference , it is very likely to cause bearing failure , interference capacity, is likely to cause the bearing inner ring due to excessive tensile stress and crack, the amount of interference is too small , too is likely to cause the bearing inner ring " flaccid ."
2.2.2 bearing assembly with clearance fit properly, are likely to cause bearing failure , a small clearance is likely to cause friction rollers and raceways fever , with the temperature rising , the bearing inner ring , rolling elements , cage , outer ring , does not cover the same temperature , there is a temperature difference between them , and thus the amount of expansion is slightly different , with the gap will result in a further reduction of the bearing according to the heat applied . the gap is too large, increasing vibration roller , roller and raceway exacerbate the impact , but also easily lead to uneven distribution of internal loads , reducing roller bearing , the central roller load is too large.
2.2.3 bearing assembly not according to process requirements, the impact of bearing with copper hammer , causing deformation of the cage , traction motor bearing inner ring is not installed correctly , or other reason the axial transverse momentum disappear , causing the bearing shaft jisi .