蘇侃臺灣大學:機械工程學研究所吳崇献Wu, Chung-HsienChung-HsienWu2010-06-302018-06-282010-06-302018-06-282008U0001-1007200816100300http://ntur.lib.ntu.edu.tw//handle/246246/187344本研究初步先修改現有試驗機,使其足以符合在彈液動潤滑條件下量測摩擦扭力的需要。接著藉量測點接觸相同表面速度和但不同滑滾比的摩擦扭力、不同表面速度但相同滑滾比的摩擦扭力,以及觀察其磨耗情形,分析滑滾比及表面速度和對潤滑情形的影響。結果發現滑滾比及表面速度和的增加均會造成摩擦力下降的趨勢,然而由其破壞條件及相同條件的表面狀況觀之,則發現滑滾比及表面速度和的增加均使油膜承載力降低。 藉過去的相關研究及理論,可推斷剪率的增加,超越了油膜層流所產生的極限剪應力,促使油膜分層,發生不連續的速度梯度,降低承載力,進而產生表面破壞。In order to measure the frictional torque under elastohydrodynamic lubrication condition, this study is to modify a tribological tester which we already have. Then using this tester, the effect of the sum of surface speed and slip ratio on the friction coefficient and load carrying capacity of the oil films generated between point contact can be evaluated by the wear conditions of the tested specimens under elastohydrodynamic conditions. The experimental results show that the increase in sliding-rolling ratio and the sum of surface speed not only caused the friction coefficient between specimens to decrease, but also caused the specimens to be worn more easily. This result means that the load carrying capacity of the oil film decreases as the sliding-rolling ratio and the sum of surface speed between two disc specimens in elliptic contact increases.中文摘要………………………………………………………………………………Ⅰ文摘要………………………………………………………………………………Ⅱ錄……………………………………………………………………………………Ⅲ表目錄………………………………………………………………………………Ⅵ號說明………………………………………………………………………………Ⅹ一章 緒論…………………………………………………………………………1-1 簡介…………………………………………………………………………1-2 相關文獻回顧……………………..………………………………………………4-2-1 潤滑失效模式相關文獻………………………………………………5-2-2 流變性質相關文獻……………………………………………………7-2-3 以數值方法計算的相關文獻…………………………………………8二章 實驗相關理論……………………………………………………………10-1 表面粗糙度………………………………………………………………………10-2 表面接觸應力……………………………………………………………………10-3 液動承載力………………………………………………………………………12-4 潤滑模式…………………………………………………………………………13-4-1 液動潤滑………………………………………………………………14-4-2 邊界潤滑………………………………………………………………14-4-3 混合潤滑…………………………………………………………15-4-4 彈液動潤滑…………………………………………………………15-5 黏度………………………………………………………………………………18-6 影響潤滑狀況的參數………………………………………………………19-6-1 表面粗度的影響…………………………………………………………19-6-2 表面滑動速度的影響……………………………………………………20-6-3 滑滾比的影響…..…………………………………………………………23-6-4 溫度的影響………………………………………………………………25-6-5 剪切稀化的影響………..…………………………………………………28三章 實驗設備與方法………………………………………………………30-1 實驗目的…………………………………………………………………………30-2 試驗機之設計……………………………………………………………………30-2-1 試驗機主要設計………………………………………………………30-2-2 軸承摩擦扭力量測設計…………………………………………………33-2-3 扭力計………………..……………………………………………………35-2-4 荷重計……………..………………………………………………………36-3 實驗條件與試片規格…………………………………………………………37-3-1 試片規格………………………………………………………………37-3-2 潤滑油性質……………………………………………………………41-3-3 加載時間間隔…………………………………………………………42-4 實驗方法…………………………………………………………………………43-4-1 試片試驗………………………………………………………………43-4-2 軸承試驗………………………………………………………………43四章 結果與討論………………………………………………………………44-1 軸承之影響………………………………………………………………………44-2 表面粗糙度的影響………………………………………………………………46-3 滑滾比的影響……………………………………………………………………46-3-1摩擦係數量測………………………………………………………….…46-3-2表面磨耗狀況………………………………………………………….…47-3-3小結…………………………………………………………………….…52-4 表面速度和的影響………………………………………………………………54-4-1表面粗糙度較小之試片實驗結果………………………………….…54-4-2表面粗糙度較大之試片實驗結果………………………………….…55-4-3小結…………………………………………………………………….…58-5 時間的影響…….………………………………………………………………59五章 結論與建議………………………………………………………………60-1 結論………………………………………………………………………………60-2 建議未來研究方向………………………………………………………………60考文獻……………………………………………………………………………613548830 bytesapplication/pdfen-US磨潤彈液動潤滑滑滾比表面速度和極限剪應力TribologyEHLThin-film lubricationShear-thinningLimiting shear stress不同滑滾比下點接觸之薄膜潤滑狀態Thin Film Lubrication of Point Contact in Different Slip Ratiosthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/187344/1/ntu-97-R95522516-1.pdf