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class="2">經(jīng)典流體潤(rùn)滑理論起源于1886年，從</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US">Reynolds</span></span><span id="n1l1njb9b" class="2">提出</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US">Reynolds</span></span><span id="n1l1njb9b" class="2">方程以來(lái)奠定了潤(rùn) 滑理論的基礎(chǔ)，距今己有200多年的歷史了<sup>[36]</sup>。起初，在進(jìn)行理論研宄時(shí)由于科技發(fā) 展的限制，許多條件都是為了更利于分析進(jìn)行了合理的簡(jiǎn)化和假設(shè)。隨著科技的發(fā)展, 分析己經(jīng)在基本模擬現(xiàn)實(shí)的基礎(chǔ)之上進(jìn)行。在潤(rùn)滑理論發(fā)展過(guò)程中每一次進(jìn)步，都與 科學(xué)技術(shù)息息相關(guān)。科技的進(jìn)步使理論得到升華，理論的發(fā)展又推動(dòng)科技躍進(jìn)，彼此 之間相互促進(jìn)。潤(rùn)滑理論的發(fā)展過(guò)程大致上可分為3個(gè)時(shí)期。</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;background:transparent"><span id="n1l1njb9b" class="2">第1時(shí)期：從1886年提出</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US">Reynolds</span></span><span id="n1l1njb9b" class="2">方程到二戰(zhàn)以前。在這個(gè)時(shí)期，計(jì)算機(jī)還是 稀有的物品，其技術(shù)尚無(wú)法的合理應(yīng)用，人們當(dāng)時(shí)研宄</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US">Reynolds</span></span><span id="n1l1njb9b" class="2">方程解的求法。研 究</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US">Reynolds</span></span><span id="n1l1njb9b" class="2">方程可以得到無(wú)限長(zhǎng)軸承和短軸承解，在此過(guò)程中主要是依靠</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US">Reynolds </span></span><span id="n1l1njb9b" class="2">的解析解和對(duì)簡(jiǎn)單宏觀(guān)場(chǎng)的模擬等，用簡(jiǎn)化假設(shè)得到的結(jié)果來(lái)說(shuō)明軸承受力情況和其 變化規(guī)律。分析了氣體和液體動(dòng)壓潤(rùn)滑在性能上的不同，潤(rùn)滑技術(shù)在軸承上的應(yīng)用得 到了發(fā)展。但是，在這個(gè)時(shí)期人們只可以簡(jiǎn)要地計(jì)算的</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US">Reynolds</span></span><span id="n1l1njb9b" class="2">方程解，得到的解 與軸承的實(shí)際情況有很大的差別。</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;background:transparent"><span id="n1l1njb9b" class="2">第2時(shí)期：二戰(zhàn)結(jié)束以后到1960年以前，潤(rùn)滑理論發(fā)展迅速。人們可以計(jì)算出 有限長(zhǎng)徑向軸承相關(guān)性能，這主要是人類(lèi)在戰(zhàn)爭(zhēng)期間保密計(jì)算的發(fā)展造成的。在此階 段人們對(duì)油膜形成有了更深刻的認(rèn)識(shí)，并且更加了解油膜邊界條件。起初，對(duì)于潤(rùn)滑 軸承人們只對(duì)軸承壓力分布進(jìn)行計(jì)算。由于數(shù)值計(jì)算技術(shù)的進(jìn)步，現(xiàn)在可以對(duì)軸承靜 特性、動(dòng)特性和穩(wěn)定性進(jìn)行分析計(jì)算，使得軸承技術(shù)也得到質(zhì)的變化。20世紀(jì)50年 代，各個(gè)地方開(kāi)始使用流體靜壓軸承。1950年以后，氣體潤(rùn)滑成為新的發(fā)展趨勢(shì)。 在這個(gè)時(shí)期，學(xué)者們發(fā)現(xiàn)慣性、溫度、彈性變形、流體性能等與潤(rùn)滑效果有著密切的 聯(lián)系，學(xué)者們開(kāi)始主要研宄潤(rùn)滑時(shí)的慣性、溫度等問(wèn)題。</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;background:transparent"><span id="n1l1njb9b" class="2">第3時(shí)期：20世紀(jì)60年代至今，工程模型建立更接近實(shí)際情況。動(dòng)靜狀態(tài)聯(lián)合 的計(jì)算分析方法成為新的求解方式，對(duì)于低副接觸的滾動(dòng)軸承，因?yàn)閯?dòng)靜結(jié)合法而使 軸承的外形設(shè)計(jì)趨于完美。人們把幾何參數(shù)模型、潤(rùn)滑劑性能模型、表面粗糙度模型 添加到潤(rùn)滑模型中，通過(guò)這種更接近工況的潤(rùn)滑模型求得流體潤(rùn)滑方程解。在高副接 觸方面，例如：凸輪、齒輪、滾動(dòng)軸承等，學(xué)者們把</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US">Reynolds</span></span><span id="n1l1njb9b" class="2">方程和</span><span id="n1l1njb9b" class="2TimesNewRoman"><span lang="EN-US">Hertz</span></span><span id="n1l1njb9b" class="2">彈性接觸 理論耦合豐富了潤(rùn)滑理論；結(jié)合彈性變形、溫度和表面結(jié)構(gòu)設(shè)計(jì)出熱彈流計(jì)算模型； 把熱變形、壓力、溫度、彈性變形、粗糙度等耦合，結(jié)合潤(rùn)滑理論和熱彈流計(jì)算模型 推導(dǎo)得出比較接近工況要求的潤(rùn)滑理論模型。對(duì)于機(jī)械故障診斷、重型機(jī)械失效、工 程潤(rùn)滑等提供了更佳準(zhǔn)確的理論。</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;background:transparent"> </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;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(shù)控加工中心主軸軸承油氣潤(rùn)滑機(jī)理研究”，因?yàn)榫庉嬂щy導(dǎo)致有些函數(shù)、表格、圖片、內(nèi)容無(wú)法顯示，有需要者可以在網(wǎng)絡(luò)中查找相關(guān)文章！本文由伯特利數(shù)控整理發(fā)表文章均來(lái)自網(wǎng)絡(luò)僅供學(xué)習(xí)參考，轉(zhuǎn)載請(qǐng)注明！</span></p></div> <div id="n1l1njb9b" class="blank30"></div> <!-- tag --> <div id="n1l1njb9b" class="blank10"></div> 標(biāo)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' 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