【Q&A Question 121】2017.05.01
Thread Content
This post was last edited by 955559 on 2017-7-21 23:01. [Q&A Question 121] May 1, 2017: What could be the reasons for a short lifespan of rolling bearings? The reference answers will be visible after responding; points are awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) The bearing seat is defective ； Centerline movement ； Incorrect installation ； Improper fit between the shaft and the housing ； Poor lubrication ； Poor sealing; dust and moisture have penetrated in ； High vibration. Scoring criteria: Incorrect answers result in 2 wealth points; *incomplete* answers earn 3–8 points. Correct answers with a detailed explanation grant 10 wealth points, while correct answers with insufficient supplementary *answers* yield 15–20 wealth points. Please use these criteria for scoring. 2017 Q&A Summary Thread (updates available) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates available) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Petrochemical Sector – “Creative Ideas for Energy Savings” campaign (sponsors sought; highest returns ever offered) http://bbs.hcbbs.com/thread-1666758-1-1.html Sponsors are being sought for this campaign; those interested can contact the campaign coordinator. Petrochemical deep processing version – the event to share pictures of chemical equipment has started! A vast amount of wealth, as well as HChuan coins, are waiting for you to claim them: http://bbs.hcbbs.com/thread-1760733-1-1.html. Notice regarding the collection of chemical engineering technical materials in the “Petroleum and Chemicals Section”: http://bbs.hcbbs.com/thread-1614796-1-1.html (Source: HChuan Chemical Forum)
Defects in the bearing housing, displacement of the center line, incorrect installation, improper fit between the shaft and the housing, poor lubrication, inadequate sealing, presence of dust, intrusion of moisture, and excessive vibration.
The lubricant contains impurities, it was damaged during installation, it has defects due to poor manufacturing quality, the lubrication is inadequate, and there are large temperature fluctuations
Material issue, improper installation! There is a problem with the quality of the lubricating oil, and the temperature is extremely high
①The bearing housing is defective; ② The center line has shifted; ③ It was installed incorrectly; ④ The shaft and the housing do not fit properly; ⑤ Lubrication is inadequate; ⑥ The sealing is poor, allowing dust and moisture to enter; ⑦ There is excessive vibration.
The bearing housing is defective； Centerline movement ； Incorrect installation ； Improper fit between the shaft and the housing ； Poor lubrication ； Poor sealing; dust and moisture have penetrated in ； Large vibration, etc
The bearing housing is defective； Incorrect installation ； Large vibration ； Centerline movement ； Improper fit between the shaft and the housing ； Poor lubrication ； Poor sealing.
During rolling, frictional forces are present, there are impurities, the lubrication effect is poor, and damage is likely to occur