本文關(guān)鍵詞：基于電容法的點(diǎn)接觸潤(rùn)滑狀態(tài)研究　出處：《大連海事大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 電容法 鏡像法 矩量法 彈流潤(rùn)滑

【摘要】：實(shí)際工作中,經(jīng)常會(huì)出現(xiàn)點(diǎn)接觸這一類高副潤(rùn)滑表面,如滾動(dòng)軸承等。這一類機(jī)械零件在生產(chǎn)實(shí)踐中經(jīng)常因?yàn)槟Σ聊p而產(chǎn)生故障。為了延長(zhǎng)零件的使用壽命,本文必須對(duì)這一類零件接觸面的摩擦狀態(tài)有清楚的認(rèn)識(shí)。因而點(diǎn)接觸彈流潤(rùn)滑理論成為了當(dāng)前的研究熱點(diǎn),許多學(xué)者都參與到這個(gè)研究領(lǐng)域中來(lái),并提出了若干假設(shè)和理論。 本文在廣泛參考國(guó)內(nèi)外相關(guān)文獻(xiàn)的基礎(chǔ)上,搭建了點(diǎn)接觸旋轉(zhuǎn)式試驗(yàn)臺(tái),并且針對(duì)此實(shí)驗(yàn)臺(tái)構(gòu)建了彈流計(jì)算理論模型。在理論模型構(gòu)建中,用Barus和Renolds的黏度定義替換了Hamrock-Dowson點(diǎn)接觸膜厚公式中的黏度定義式,并仿照#12誘導(dǎo)方程的設(shè)定方法,自行設(shè)定了新的誘導(dǎo)方程,簡(jiǎn)化了計(jì)算、提高了理論精度。對(duì)該理論模型的計(jì)算結(jié)果與Hamrock-Dowson公式所計(jì)算的結(jié)果進(jìn)行了對(duì)比,得出了兩者結(jié)果基本一致。本文還運(yùn)用電容法對(duì)自行設(shè)計(jì)的實(shí)驗(yàn)臺(tái)的油膜厚度的變化趨勢(shì)進(jìn)行了測(cè)量和分析,得出不同轉(zhuǎn)速與載荷下電容值的變化規(guī)律,以及對(duì)應(yīng)最小油膜厚度的變化趨勢(shì)。用鏡像法與矩量法對(duì)電容值進(jìn)行了計(jì)算,并且分析了鏡像法與矩量法計(jì)算結(jié)果產(chǎn)生偏差的原因。將計(jì)算出的電容值與實(shí)測(cè)電容值進(jìn)行了對(duì)比與分析。研究結(jié)果表明：當(dāng)載荷一定時(shí),電容值隨轉(zhuǎn)速的增加而減小,并且減小的幅度隨轉(zhuǎn)速的增加而變小。在定轉(zhuǎn)速的條件下,電容值隨載荷的增加而增加,并且增加的幅度隨載荷的增加而變小。電容值的變化受轉(zhuǎn)速的變化影響較大而載荷對(duì)電容值的影響較小。計(jì)算電容值隨著最小膜厚的變大也變小,并且隨著最小膜厚的增大,電容值減小的幅度越來(lái)越小。Hamrock-Dowson點(diǎn)接觸膜厚公式所計(jì)算出的油膜厚度與針對(duì)本實(shí)驗(yàn)臺(tái)所構(gòu)建的理論模型所計(jì)算出的油膜厚度的偏差受到黏溫系數(shù)的影響。在出口區(qū)產(chǎn)生壓力陡增現(xiàn)象。并且在定載荷的情況下,當(dāng)轉(zhuǎn)速增加時(shí)壓力陡增的峰值變大并向油膜中心區(qū)靠近。在出口區(qū)也出現(xiàn)膜厚頸縮現(xiàn)象,并且在定載荷的情況下,當(dāng)轉(zhuǎn)速增加時(shí)頸縮區(qū)域向油膜中心區(qū)靠近。
[Abstract]:In actual work, often contact the high lubrication surface, such as rolling bearings. This kind of mechanical parts in the production practice often due to friction and wear failure. In order to prolong the service life of parts, we must on the parts of the friction surface state have a clear understanding and point. Contact Elastohydrodynamic Lubrication Theory has become the focus of current research, many scholars are involved in this research field, and puts forward some hypotheses and theories.
Based on extensive literatures at home and abroad, to build a contact rotating test rig, and the experiment platform is constructed EHL calculation theoretical model. In the construction of the theoretical model, using Barus and Renolds to replace the definition of viscosity viscosity defined type Hamrock-Dowson point contact film thickness in the formula, and according to the method set induced by #12 equation, set by the new equation, simplified the calculation and improve the accuracy of theory. The calculated results are compared to the theoretical model and Hamrock-Dowson formula of the calculated results, the two results are basically the same trend. This paper also used the capacitance method for oil film thickness on self-designed platform the measured and analysis, obtains the variation of different speed and load capacitance values, and the corresponding minimum film thickness. The changes of electric image method and moment method Capacitance values were calculated and analyzed the image method and moment method for calculating the deviation results. The calculated capacitance values are compared and analyzed with the measured capacitance values. The results show that: when the load is constant, the capacitance decreases with the increase of speed, and reduces with the increasing of engine speed but smaller. In constant speed condition, the capacitance value increases with the increase of load, and increases with the increase of load decreases. The variation of capacitance changes influenced by the speed and load has little effect on the capacitance of the capacitor. The calculation value with the minimum film thickness becomes larger small, and with the minimum film thickness increases, the deviation of the thickness of oil film theory model of oil film thickness capacitance decreased degree is becoming smaller.Hamrock-Dowson point contact film thickness formula is calculated and constructed according to the experiment platform of the calculated Affected by the viscosity temperature coefficient. In the export pressure rise phenomenon. And in constant load condition, when the speed increases the peak pressure sharply becomes large and close to the oil film to the center. In the export zone is also the film thickness necking, and under constant load, when the speed increases the necking zone close to the oil film center.

【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH117.2

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本文編號(hào)：1386819