Dynamic Characteristic and Experiment Analysis of Planetary Roller Screw

行星滾柱絲杠動力學特性分析及試驗研究

郭嘉楠(Jia-Nan Guo) ； 何鵬(Peng He) ； 劉佔生(Zhan-Sheng Liu) ； 黃洪雁(Hong-Yan Huang) ； 黃玉平(Yu-Ping Huang) ； 丁偉濤(Wei-Tao Ding)

《中國機械工程學刊》 39卷2期 (2018/04) Pp. 171-178

摘要

This paper develops a dynamic model to predict the natural frequencies of planetary roller screw. In this model, meshing stiffness of planetary roller screw is taken into consideration. Based on this model, natural frequencies of the system with different mesh stiffness induced by variation of contact angle, roller radius and eccentricity are studied theoretically. The meshing stiffness and natural frequencies are found to increase with contact angle. The maximum natural frequencies reach peak values during the increase of the roller radius. The eccentricity leads to a non-uniform deflection of each roller around the screw. The eccentricity has little effect on the natural frequencies of planetary roller screw. Natural frequencies of the system are tested to valid the simulation results by setting up a planetary roller screw test rig. Comparisons between numerical and experimental results are presented and discussed.

關鍵字

planetary roller screw ； dynamic characteristics ； contact analysis ； experiment study

並列摘要

本文建立了考慮嚙合剛度的行星滾柱絲杠動力學模型。分析了接觸角、滾柱半徑和偏心對嚙合剛度以及行星滾柱絲杠固有頻率的影響規律：行星滾柱絲杠的嚙合剛度和固有頻率都隨著接觸角的增加而增大。滾柱半徑達到某一特定值時行星滾柱絲杠固有頻率達到最大。偏心會導致圍繞在絲杠周圍的滾柱產生不均勻的變形，但其對行星滾柱絲杠的固有頻率的影響較小。搭建行星滾柱絲杠固有頻率特性試驗台，驗證了模擬計算結果的準確性。