摘要
针对航空航天环境下滚珠丝杠副经常工作于高频、高载工况中,存在摩擦温升过高导致润滑脂性能退化及热变形等问题,建立摩擦温升模型。讨论热变形对滚珠丝杠副结构参数的影响;结合热变形并引入惯性载荷,求解滚珠丝杠副发热量与对流换热系数;对稳态温度理论值进行求解;采用Workbench进行了温度仿真,得到不同频率、振幅与载荷条件下的滚珠丝杠副的稳态温度云图。理论计算结果表明:振幅对温升的影响最为显著,载荷对温升的影响大于频率对温升的影响。
In order to solve the problems of grease performance degradation and thermal deformation caused by excessive friction temperature rise due to the fact that ball screw side often works in high frequency high load conditions in aerospace environment,the friction temperature rise model is established.The influence of thermal deformation on the parameters of ball screw substructure is discussed.By combination of the thermal deformation and with the introduction of inertial load,the co-heating and convection heat exchange coefficient of the ball screw are solved,and the theoretical value of steady state temperature is solved.By Workbench,the temperature simulation is carried out to obtain the steady-state temperature cloud diagram of the ball screw side under different frequency,amplitude and load conditions.The theoretical calculation results show that the amplitude has the most significant effect on temperature rise,and the effect of load on temperature rise is greater than that of frequency on temperature.
作者
张家诚
范元勋
张训国
许鹿辉
张阳
鞠斌
杨泽宇
ZHANG Jiacheng;FAN Yuanxun;ZHANG Xunguo;XU Luhui;ZHANG Yang;JU Bin;YANG Zeyu(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Shanghai Space Propulsion Technology Research Institute,Shanghai 201109,China)
出处
《机械制造与自动化》
2023年第2期27-30,54,共5页
Machine Building & Automation
基金
航天一院高校联合创新基金项目(CALT201512)。
关键词
滚珠丝杠副
热变形
惯性载荷
温度仿真
ball screw
thermal deformation
inertial load
temperature simulation
