机械设计与制造英文翻译.docx
( 4.5 )《机械设计与制造英文翻译.docx》由会员分享，可在线阅读，更多相关《机械设计与制造英文翻译.docx（10页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。
1、机械设计与制造英文翻译 外文翻译 How to extend the service life of bearing Natures harsh working conditions can lead to the failure of bearing, but if you follow some simple rules, opportunities for normal operation of the bearing can be improved.In the using proce of bearing,extreme neglect in a bearing leads to o
2、verheating and poibly seizure or, at worst, an explosion.But even a failed bearing leaves clues as to what went wrong.After a little detective work, action can be taken to avoid a repeat performance.Some of the reasons for bearing failure, but common is incorrect use of improper use, pollution, lubr
3、icants, loading and unloading or handling damage and installation error, etc.The problem is often not difficult to diagnose, because of a failed bearing usually leaving the slightest trace what went wrong.However，while a postmortem yields good information，it is better to avoid the proce altogether b
4、y specifying the bearing correctly in The first placeTo do this，it is useful to review the manufacturers sizing guidelines and operating characteristics for the selected bearing.Equally important is the research requirement of noise, torque, beating, and poible exposure to pollutants, hostile liquid
5、, and extreme temperatures.Whether can provide further clues bearing is suitable for this work. 1 bearing failure reason - 1 environmental vibration.Also a light preload on the bearing helps keep the balls and raceway in tight contact.Preloading also helps prevent false brinelling during transit.Sei
6、zures can be caused by a lack of internal clearance, improper lubrication, or exceive loading.Before seizing, exceive, friction and heat softens the bearing steel.Overheated bearings often change color，usually to blue-black or straw coloredFriction also causes stre in the retainer，which can break an
7、d hasten bearing failure Premature material fatigue is caused by a high load or exceive preloadWhen these conditions are unavoidable，bearing life should be carefully calculated so that a maintenance scheme can be worked out Another solution for fighting premature fatigue is changing materialWhen sta
8、ndard bearing materials，such as 440C or SAE 52100，do not guarantee sufficient life，specialty materials can be recommended.In addition，when the problem is traced back to exceive loading，a higher capacity bearing or different configuration may be used Creep is le common than premature fatigueIn bearin
9、gsit is caused by exceive clearance between bore and shaft that allows the bore to rotate on the shaftCreep can be expensive because it causes damage to other components in addition to the bearing 0ther more likely creep indicators are scratches，scuff marks，or discoloration to shaft and boreTo preve
10、nt creep damage，the bearing housing and shaft fittings should be visually checked Misalignment is related to creep in that it is mounting relatedIf races are misaligned or cockedThe balls track in a noncircumferencial pathThe problem is incorrect mounting or tolerancing，or insufficient squarene of t
11、he bearing mounting siteMisalignment of more than 1/4can cause an early failure Contaminated lubricant is often more difficult to detect than misalignment or creepContamination shows as premature wearSolid contaminants become an abrasive in the lubricantIn addition。 - 3 tolerate only minimal deflect
- 配套讲稿：
如PPT文件的首页显示word图标，表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制：
部分文档作品中含有的国旗、国徽等图片，仅作为作品整体效果示例展示，禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词：
- 机械设计 制造 英文翻译
淘文阁 - 分享文档赚钱的网站所有资源均是用户自行上传分享，仅供网友学习交流，未经上传用户书面授权，请勿作他用。
限制150内