摘要
建立了龙门加工中心主轴系统的有限元模型,计算了主轴轴承的发热量以及主轴系统各个表面的对流换热系数,利用ANSYS对其温度场进行有限元分析,并利用ANSYS中的耦合场分析计算出主轴系统的热变形。计算结果表明:主轴系统在一定载荷下以3000r/min的速度运转时,需要2h 45min可达到热平衡状态;最高温升出现在前端轴承安装处,最大热变形达21.7μm。分析结果为主轴系统结构优化设计以及冷却、补偿系统的设计提供了一定依据。
The finite model of a gantry type machine center spindle system was built, The spindle bearing heat and all surface convective heat transfer coefficient were calculated. The thermal field was analyzed by ANSYS with the thermal deformation of the spindle system by using coupled field analysis function of ANSYS. According to the results, spindle system in a certain load needs 2 hours 45 minutes to reach thermal balance state when rotating at the speed of 3 000r/min. The maximum temperature appears at where the front bearing is installed; the largest deformation is 21.7μm. The results provide a basis to machine center on the optimization of structure, cooling system and compensation system design.
出处
《机床与液压》
北大核心
2008年第5期16-18,43,共4页
Machine Tool & Hydraulics
基金
国家高技术研究发展计划(863)项目(2005AA424220)
北京航空航天大学数字化设计与制造北京市重点实验室共建项目
