高过载脂润滑滚珠丝杠副流固耦合分析  

Analysis of Fluid-structure Coupling of High Overload Grease Lubricated Ball Screw Pair

作　　者：许鹿辉 范元勋[1] 李晓飞 XU Luhui;FAN Yuanxun;LI Xiaofei(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《机械制造与自动化》2024年第1期20-23,28,共5页Machine Building & Automation

基　　金：航天一院CALT基金资助项目(CALT201512)。

摘　　要：润滑脂润滑对滚珠丝杠副的振动与冲击属于复杂的流固耦合过程。为描述润滑脂与滚珠丝杠间的相互影响,建立滚珠丝杠副与润滑脂的流-固耦合模型,采用耦合拉格朗日-欧拉算法,分析滚珠丝杠副在转速和轴向载荷作用下润滑脂流动和接触滚道的接触应力情况。结果表明:在考虑润滑条件下,滚珠丝杠滚道处的受力更加均匀,接触应力比未考虑润滑脂时减少了18%,这为航天用滚珠丝杠副的选型与设计提供一定的选择准则。The vibration and impact of grease lubrication on the ball screw pair belong to a complex fluid-structure coupling process.In order to describe the interaction between grease and ball screw,the model of the fluid-structure coupling between the ball screw pair and the grease is established.The coupled Lagrangian-Eulerian algorithm is applied to analyze the grease flow and contact stress of the contact raceway of the ball screw pair under the action of rotational speed and axial load.The results show that in consideration of lubrication,the force on the ball screw raceway is more uniform,and the contact stress is reduced by 18%compared with that without considering the grease,which provides certain selection criteria for the selection and design of the aerospace ball screw pair.

关 键 词：润滑脂 滚珠丝杠 流固耦合 CEL算法 

分 类 号：TH132[机械工程—机械制造及自动化]