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鋼球滾子弧面分度凸輪機構彈流潤滑分析
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國家自然科學基金資助項目（50875153）


Elastohydrodynamic Lubrication Analysis of Globoidal Indexing Cam with Steel Ball
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    摘要:

    利用Hamrock-Dowson膜厚度公式和點接觸中心區(qū)油膜計算公式,，推導出鋼球滾子弧面分度凸輪機構中鋼球和凸輪滾道接觸油膜厚度的計算公式,。利用數(shù)值計算方法,，比較分析了凸輪在采用修正等速,、修正梯形加速度和修正正弦加速度運動規(guī)律曲線時,，整個分度周期內油膜厚度的變化,。討論了凸輪轉速,、分度盤負載力矩,、鋼球直徑,、凸輪滾道截面半徑與分度盤直徑比等參數(shù)對油膜厚度的影響,，為鋼球滾子弧面分度凸輪的潤滑設計提供了理論依據(jù)。

    Abstract:

    Based on Hamrock-Dowson and film thickness calculation formulae, the EHD film thickness formulae of globoidal indexing cam mechanism of steel ball between steel ball and cam raceway were deduced. By using numerical analysis method, film thickness of cams with modified constant velocity motion curve, modified trapezoidal acceleration motion curve and modified sine acceleration motion curve respectively were compared during the entire indexing cycle. The effects of cam speed, load torque on indexing plate, ball diameter, indexing plate diameter, curvature ratio, etc. on film thickness were also discussed. It provided theoretical basis for the lubrication design of globoidal indexing cam of steel ball.

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付振山,馮顯英,李蕾,張成梁.鋼球滾子弧面分度凸輪機構彈流潤滑分析[J].農業(yè)機械學報,2011,42(6):208-212. Fu Zhenshan, Feng Xianying, Li Lei, hang Chengliang. Elastohydrodynamic Lubrication Analysis of Globoidal Indexing Cam with Steel Ball[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(6):208-212.

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