摘要
针对机床高速化发展过程中螺母发热无法控制的问题,提出了空心冷却螺母的设计,即将螺母加工成空心并通入冷却介质的方式对螺母进行冷却以达到抑制螺母温升的设计方法。利用CFX软件,将理论计算得到的摩擦热加载到螺母滚道内,对不同冷却介质、不同载荷、不同转速下螺母的冷却效果进行分析,并对同一冷却介质不同流速下的流场和温度场进行分析。结果表明:综合分析认为运用专用冷却油的冷却效果最好;载荷及转速对空心螺母温升影响较小;揭示了空心螺母随着速度变化的流场变化规律以及温度场分布情况。
Aiming at the problem thatthe out-of-control of nut pair friction heat during the high-speed development ofmachine tool,a hollow cooling n ut design was put forward,which was a design that the nut was manufactured as hollow and cooling medium was injected,so as to control the nut temperature-rising. Using CFX which was a Computational Fluid Dynamics（CFD）software,the friction heat which was calculated by theoretical method was loaded on the ball screw race. By analyzingcooling mediums,it showed the special cooling oil had the best cooling effect; by analysis on the temperature rising under different loads and rotation rates,it showed the hollow nut had little influence on them; by analysis on the flow field and the temperature field under different flow velocity of cooling medium,it revealed the changing rule and the distribution of temperature.
出处
《机械设计与制造》
北大核心
2016年第2期228-231,共4页
Machinery Design & Manufacture
关键词
空心冷却螺母
热态
仿真分析
Hollow Cooling Nut
Thermal Characteristics
Simulation Analysis
