機(jī)械設(shè)計(jì)與制造英文翻譯

1、外文翻譯How to extend the service life of bearingNature's 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 improve

2、d. In the using process of bearing,extreme neglect in a bearing leads to overheating and possibly seizure or, at worst, an explosion. But even a failed bearing leaves clues as to what went wrong. After a little detective

3、 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, lubricants, loading and unloading or handling damage and installat

4、ion 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 th

5、e process altogether by specifying the bearing correctly in The first place．To do this，it is useful to review the manufacturers sizing guidelines and operating characteristics for the selected bearing. Equally importa

6、nt is the research requirement of noise, torque, beating, and possible exposure to pollutants, hostile liquid, and extreme temperatures. Whether can provide further clues bearing is suitable for this work. 1 bearing b

7、earing failure failure reason reason to reduce 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

8、.Seizures can be caused by a lack of internal clearance, improper lubrication, or excessive loading. Before seizing, excessive, friction and heat softens the bearing steel. Overheated bearings often change color，usually

9、to blue-black or straw colored．Friction also causes stress in the retainer，which can break and hasten bearing failure．Premature material fatigue is caused by a high load or excessive preload．When these conditions are una

10、voidable，bearing life should be carefully calculated so that a maintenance scheme can be worked out．Another solution for fighting premature fatigue is changing material．When standard bearing materials，such as 440C or SAE

11、 52100，do not guarantee sufficient life，specialty materials can be recommended. In addition，when the problem is traced back to excessive loading，a higher capacity bearing or different configuration may be used．Creep is

12、 less common than premature fatigue．In bearings．it is caused by excessive clearance between bore and shaft that allows the bore to rotate on the shaft．Creep can be expensive because it causes damage to other componen

13、ts in addition to the bearing．0ther more likely creep indicators are scratches，scuff marks，or discoloration to shaft and bore．To prevent creep damage，the bearing housing and shaft fittings should be visually checked．Misa

14、lignment is related to creep in that it is mounting related．If races are misaligned or cocked．The balls track in a noncircumferencial path．The problem is incorrect mounting or tolerancing，or insufficient squareness of th