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id="tpnrxl7j" class="title"> <h3><a>軸承的熱態特性分析<small></small></a></h3> </div> <!-- 頁面標題結束 --> <hr class="featurette-divider"> <!-- 中部開始 --> <div id="tpnrxl7j" class="container"> <!-- 正文 --> <div id="tpnrxl7j" class="lead" id="print"> <p> <a name="bookmark14" style="line-height: 19pt; background-color: transparent;"><span id="tpnrxl7j" class="32pt">第三章軸承的熱態特性分析</span></a></p> <p class="50" align="left" style="margin: 0cm 0cm 9.7pt; line-height: 14pt; page-break-after: avoid; background: transparent;"><a name="bookmark15"><span id="tpnrxl7j" class="51pt"><span style="font-family: SimSun;">3.1</span></span></a><span id="tpnrxl7j" class="51pt">摩擦、磨損對軸承的影響</span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:16.35pt; margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent: 26.0pt;line-height:23.3pt;mso-line-height-rule:exactly;background:transparent"><span id="tpnrxl7j" class="2">如圖</span><span id="tpnrxl7j" class="2"><span style="font-family: SimSun;">3.1</span></span><span id="tpnrxl7j" class="2">所示，在滾動軸承高速旋轉時，軸承滾動體與軌道間摩擦力會隨著轉速 的增加而增大，導致軸承耗損加劇，直接造成軸承的磨損過度、點蝕、擦傷等問題， 使軸承的精度下降，使用壽命減小。摩擦力的增大，直接導致軸承發熱量升高，使軸 承發生燒結現象，直接造成使用壽命縮短。軸承發熱量的變大，直接導致軸承溫度升 高，由于過度發熱使軸承熱變形量變大，使軸承精度降低，降低了軸承的使用壽命和 機械加工質量。</span></p> <p class="50" align="left" style="margin: 21.1pt 0cm 19pt; line-height: 14pt; page-break-after: avoid; background: transparent;"><a name="bookmark16"><span id="tpnrxl7j" class="51pt"><span style="font-family: SimSun;">3.2</span></span></a><span id="tpnrxl7j" class="51pt">軸承摩擦力矩產生原理</span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:11.0pt; margin-left:0cm;text-indent:0cm;line-height:11.0pt;mso-line-height-rule:exactly; background:transparent"><st1:chsdate year="1899" month="12" day="30" islunardate="False" isrocdate="False" w:st="on"><span id="tpnrxl7j" class="2"><span style="font-family: SimSun;">3. 2. </span></span><span id="tpnrxl7j" class="2">1</span></st1:chsdate><span id="tpnrxl7j" class="2">滾動軸承的摩擦起因</span></p> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:26.0pt;line-height:23.3pt;mso-line-height-rule: exactly;mso-list:l0 level1 lfo1;background:transparent"><!--[if !supportLists]--><span style="font-family: SimSun;">(1)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span id="tpnrxl7j" class="2">在滾動接觸面上的差動滑動所引起的摩擦：滾動體旋轉運動時，表面某點的 線速度與此點到軸線的距離成正比<sup>[41]</sup>。人們發現接觸區各點的線速度是不同，這是由 于滾動體與軌道是曲面接觸，接觸點到滾動體自轉軸線的距離不相等。接觸面中間部 分和兩側會產生差動滑動，此滑動只發生在純滾動運動時的點接觸的位置，且滑動方 向不同。接觸區面積微小，各點線速度基本上沒有區別，稱為微觀差動滑動摩擦<sup>[42]</sup>。</span></p> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:26.0pt;line-height:23.3pt;mso-line-height-rule: exactly;mso-list:l0 level1 lfo1;tab-stops:47.55pt;background:transparent"><!--[if !supportLists]--><span style="font-family: SimSun;">(2)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span id="tpnrxl7j" class="2">材料滯后性所造成的純滾動摩擦：滾動體沿滾道表面滾動，軸承在受力的作 用下，接觸表面產生彈性變形；取消力的作用，彈性變形將恢復大部分；但隨著壓力 的增大，負載減少時的形變大于給定應力的形變<sup>[42]</sup>。這種彈性滯后性反映了能量的損 失，這種能量的損失為滾動摩擦阻力<sup>[43]</sup>。</span></p> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:26.0pt;line-height:23.3pt;mso-line-height-rule: exactly;mso-list:l0 level1 lfo1;tab-stops:47.8pt;background:transparent"><!--[if !supportLists]--><span style="font-family: SimSun;">(3)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span id="tpnrxl7j" class="2">滑動接觸部位的純滑動摩擦：滾動體沿著滾道的滾動不是純滾動。滾動體沿 著滾道的滾動不僅有自身的滾動，還有沿著滾道的滑動。純滑動摩擦是軸承滑動接觸 位置引起的摩擦和滾動體在滾道上打滑引起的摩擦的總稱。滾動體打滑量與軸承的轉 速、載荷、尺寸結構和潤滑劑物理特性等息息相關。目前關于軸承的打滑量還沒有明 確的計算方法。</span></p> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:26.0pt;line-height:23.3pt;mso-line-height-rule: exactly;mso-list:l0 level1 lfo1;tab-stops:47.3pt;background:transparent"><!--[if !supportLists]--><span style="font-family: SimSun;">(4)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span id="tpnrxl7j" class="2">滾動體沿接觸面中心法線的自旋滑動引起的摩擦:對于球軸承，軸承承受軸 向載荷時，滾動體會繞接觸面法線方向沿著滾道面旋轉。自旋運動引起的摩擦可以稱 為自旋滑動摩擦。</span></p> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-indent:26.0pt; line-height:23.3pt;mso-line-height-rule:exactly;mso-list:l0 level1 lfo1; tab-stops:47.8pt;background:transparent"><!--[if !supportLists]--><span style="font-family: SimSun;">(5)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span id="tpnrxl7j" class="2">潤滑劑粘性摩擦：潤滑劑粘性摩擦由兩部分組成，一部分是油膜內部的摩擦， 另一部分是滾動體和保持架運動時攪動潤滑劑引起的摩擦。不論彈流潤滑還是動壓潤 滑，其油膜厚度的計量單位都是微米，接觸面積微小，因此接觸區內潤滑劑的體積大 部分時候小于幾立方毫米。進行軸承潤滑的潤滑劑由于滾動體的攪動作用而造成飛 派，形成攪動阻力。攪動阻力會造成攪動摩擦損耗，此損耗是潤滑劑摩擦損耗主要組 成部分。潤滑劑過多軸承攪動阻力增加，軸承溫升變大。研宄證明了在油量合適的情 況下進行潤滑，潤滑劑的攪動摩擦損失為整體損失的50%至60%,軸承滾動與滑動 摩擦損失為整體的20%至30%,密封圈摩擦損失為整體的10%至30%<sup>[41]</sup>。</span></p> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-indent:26.0pt; line-height:23.3pt;mso-line-height-rule:exactly;mso-list:l0 level1 lfo1; tab-stops:47.8pt;background:transparent"> </p> <p class="21" style="margin:0cm;margin-bottom:.0001pt;text-indent:26.0pt; line-height:23.3pt;mso-line-height-rule:exactly;mso-list:l0 level1 lfo1; tab-stops:47.8pt;background:transparent"><span style="font-size:9.0pt;font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";mso-bidi-font-family: "Times New Roman";mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language: ZH-CN;mso-bidi-language:AR-SA">本文采摘自“數控加工中心主軸軸承油氣潤滑機理研究”，因為編輯困難導致有些函數、表格、圖片、內容無法顯示，有需要者可以在網絡中查找相關文章！本文由伯特利數控整理發表文章均來自網絡僅供學習參考，轉載請注明！</span></p></div> <div id="tpnrxl7j" class="blank30"></div> <!-- tag --> <div id="tpnrxl7j" class="blank10"></div> 標簽： <a href='/index.php?case=tag&act=show&tag=%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>加工中心</a> <a href='/index.php?case=tag&act=show&tag=%E6%95%B0%E6%8E%A7%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>數控加工中心</a> <a href='/index.php?case=tag&act=show&tag=CNC%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>CNC加工中心</a> <a href='/index.php?case=tag&act=show&tag=%E6%95%B0%E6%8E%A7%E6%9C%BA%E5%BA%8A' target='_blank'>數控機床</a> <a href='/index.php?case=tag&act=show&tag=%E4%B8%BB%E8%BD%B4' target='_blank'>主軸</a> <a href='/index.php?case=tag&act=show&tag=%E8%BD%B4%E6%89%BF' target='_blank'>軸承</a> <!-- 分類 --> <div id="tpnrxl7j" class="blank10"></div> 分類： <a href='/bethel/type/jnc/type-1.html' target='_blank'>加工中心</a> <div 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