Mixed-lubrication analysis of planetary roller screw

Mixed-lubrication analysis of planetary roller screw
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行星滚柱丝杠混合润滑分析

DOI:
10.1016/j.triboint.2019.105883
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发表时间:
2019-07
影响因子:
6.2
通讯作者:
Song Baoyu
Song Baoyu
中科院分区:
工程技术1区
文献类型:
--
作者:
Xie Zhijie;Xue Qihe;Wu Jiqiang;Gu Le;Wang Liqin;Song Baoyu

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建立了考虑接触载荷、螺纹接触几何形状、表面粗糙度和瞬态效应的行星滚子丝杠混合润滑模型。讨论了螺杆转速、轴向载荷和表面粗糙度对润滑的影响。提高转速对接触区域的润滑有显著影响。随着转速的增加,油膜厚度增加,摩擦系数和接触面积比减小,润滑方式由混合型向全膜型转变。随着载荷的增加,膜厚比减小,而摩擦系数和最大亚表面von Mises应力增加。高精度加工可以通过适当降低加工表面的粗糙度来改善润滑,这将增加油膜厚度并降低接触面积比。
The mixed-lubrication model of the planetary roller screw is proposed considering contact load, contact geometry of thread, surface roughness and transient effects. The influences of rotational speed of the screw, axial load and surface roughness on lubrication are discussed. Increasing rotational speed has a significant effect on the lubrication of contact areas. As the speed increases, the film thickness increases while the friction coefficient and contact-area ratio decrease, and the lubrication mode changes from mixed to full-film. As the load increases, the film-thickness ratio decreases while the friction coefficient and maximum subsurface von Mises stress increase. High-precision machining can improve lubrication by properly reducing the roughness of the machined surface, which would increase film thickness and decrease the contact-area ratio.
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发表时间: 2007
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