Roller Dynamic Analysis and Pure Rolling Criterion for one type High Speed Cylinder Cam Mechanism

一種高速圓柱凸輪滾輪純滾動分析以及純滾動判據

徐健(Jian Xu) ； 李強(Qiang Li) ； 楊臻(Zhen Yang)

《中國機械工程學刊》 37卷4期 (2016/08) Pp. 315-323

摘要

為了給出一種固定圓柱凸輪滾輪的純滾動判據，一種凸輪機構和主要從動件系統背景，對滾輪系統在高速下建立已經完成分析。第一步，從動件系統的加速度被分解，指出了從動件的加速度將引起系統驅動力矩。從動件線性加速度和其轉動加速度被表示出旋轉體角度φ，角速度ω_1，角加速ε_1以及滾動壓力角。利用主滾輪以及工作構件分別作為研究物體，利用牛頓第二定律，主滾輪動力學必要條件被推導出來。使用某型滾輪系統，主滾輪判斷，有還是沒有ε_1。必須指出，是否純滾動不僅客觀的增加了非純滾動，而且可以增加滾輪的壓力高達3倍以上，摩擦力到3～4倍。指出了減小主滾輪的tt，增加主滾輪的內部直徑R_n，減少了主滾輪的外徑R都能增加了滾輪的純滾動，該純滾動在降低系統驅動功耗方面，以及減小系統的磨損極大好處。這樣在檢查圓柱凸輪方面具有一定的價值。

並列摘要

In order to give the roller pure rolling criterion for fixed cylinder cam roller follower mechanism, with the background of one type cylinder cam mechanism and main roller-working part system, the roller dynamics analysis of high speed cylinder cam mechanism was performed. Firstly the working part system' acceleration was decomposed and it pointed out that the working part's maximum linear motion acceleration had some influence on the system driving moment. The main roller's longitudinal motion acceleration and its pure rolling angular acceleration was expressed with the variables of revolving body's rotating angleφ, its angular velocityω_1, its angular accelerationε_1 and the cam curve pressure angleθ. With the main roller and working part as the research object respectively, by using the Newton's Second law, the dynamics necessary condition of the main roller's pure rolling is deduced. With some certain cylinder cam system example, the movement status of main roller is judged with and without the revolving body angular accelerationε_1. It points out that the rotational angular acceleration not only increases the possibility of non-pure rolling but also increases the roller's pressure force up to 3 times and friction force 3~4 times. In the same time it indicates that properly reducing the thickness of the main roller t ,increasing the main roller's inner hole radius R_n , reducing the main roller's outer radius R also helps the pure roll; and the pure rolling has great significance in reducing system's drive consumption and cam system's wear condition. Thus it has some reference value for cylinder cam profound design and checking the design quality.

並列關鍵字

Cylinder Cam ； Pure Rolling ； Friction ； Pressure force ； Criterion