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CSME 2018/04
Volume 39 No.2
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171-178
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Dynamic Characteristic and Experiment Analysis of Planetary Roller S crew
Jia-Nan Guoa, Peng He a, Zhan-Sheng Liub, Hong-Yan Huangb, Yu-Ping Huangc and Wei-Tao Dingc
aVibration and Acoustic Control Technology for Power Machinery, Harbin Institute of Technology, Harbin, 150001, China.
bVibration and Acoustic Control Technology for Power Machinery, Harbin Institute of Technology, Harbin, 150001 China.
cChina Academy of Launch Vehicle Technology, Beijing, 100000, China.
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Abstract:
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 result s by setting up a planetary roller screw test rig. Comparisons between numerical and experimental results are presented and discussed.
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Keywords: planetary roller screw, dynamic characteristics, contact analysis, experiment study study.
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©
2018
CSME , ISSN 0257-9731
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