機(jī)械設(shè)計制造復(fù)習(xí)(存儲版)
【正文】 d information，it is better to avoid the 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 important is the research requirement of noise, torque, beating, and possible exposure to pollutants, hostile liquid, and extreme can provide further clues bearing is suitable for this failure reasonenvironmental a light preload on the bearing helps keep the balls and raceway in tight also helps prevent false brinelling during can be caused by a lack of internal clearance, improper lubrication, or excessive seizing, excessive, friction and heat softens the bearing bearings often change color，usually to blueblack 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 unavoidable，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 52100，do not guarantee sufficient life，specialty materials can be addition，when the problem is traced back to excessive loading，a higher capacity bearing or different configuration may be used．Creep is less mon 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 ponents 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．Misalignment 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 the bearing mounting site．Misalignment of more than 1/4由環(huán)境和污染所產(chǎn)生的軸承失效是可以預(yù)防的，而且通過簡單的肉眼觀察是可以確定產(chǎn)生這類失效的原因。這種破壞稱為低荷振蝕。因此，要根據(jù)不同的用途來選用潤滑劑。在許多工業(yè)產(chǎn)品中，污染是不可避免的，因此常用密封或遮護(hù)裝置來保護(hù)軸承，使其免受灰塵或臟物的侵蝕。噪聲的分析是用安德遜計進(jìn)行的，該儀器在軸承生產(chǎn)中可用來控制質(zhì)量，也可對失效的軸承進(jìn)行分析。做事也比較認(rèn)真付責(zé)任。很強(qiáng)的事業(yè)心和責(zé)任感使我能夠面對任何困難和挑戰(zhàn)。面對除塵效果不良，設(shè)備運(yùn)轉(zhuǎn)周期短而造成的緊張局面沒有絲毫怨言，而是以更加飽滿的熱情，更加昂揚(yáng)的斗志，經(jīng)常提前上班，推遲下班時間，甚至放棄休假時間，一絲不茍地干好每項工作，從未發(fā)生過影響生產(chǎn)的情況。在這過程中他根據(jù)現(xiàn)場實際設(shè)計提出多項技改方案，如：①、重力脫水器底面容易積泥加沖洗水；②、原設(shè)計檢修人孔不合理進(jìn)行統(tǒng)一規(guī)范；③、錘陀支架沒有適合現(xiàn)場實際的，他自行設(shè)計一套支架等。XX年提出并實施板框水回收工作，利用酸堿中和原理降低一次除塵水硬度，極大地改善了轉(zhuǎn)爐除塵水質(zhì)，被分廠評為將成本突出個人。至今我在自己的崗位上通過提高自己的綜合能力，滿足工作需要，不斷學(xué)習(xí)、不恥下問，得到同事們的一致好評。專業(yè)技能加優(yōu)異的成績，我所
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