摘要
针对磁悬浮式驱动织针运动过程中温度变化导致的散热问题,从摩擦热流生成、温度场与应力场的数值计算等方面提出织针滑动摩擦的分析方法,揭示磁悬浮式驱动织针发生热失效的机理。以ANSYS14.0有限元分析软件为仿真平台,建立织针装置的参数化模型,分析织针在成圈、集圈及浮线3种运动过程中的瞬态温度分布和应力分布。结果表明:3种运动状态刚完成时瞬态的最低温度分别为13℃、17℃、18℃,最高温度分别为46℃、59℃、63℃,满足织针材料对温度的要求;织针最大应力在x方向为3.12×10-4MPa,表现为压应力,满足织针材料对强度的要求;可为磁悬浮织针选材和结构设计提供参考。
In view of the cooling problem due to temperature changes in the motion of the magnetic suspension driven needle,this paper presents an analyzing method for sliding friction of needles in terms of numerical calculation of forming of frictional heat-flow,temperature field and stress field,and discloses the thermal failure mechanism of the magnetic suspension driven needle.Based on the finite element analyzing software platform-ANSYS14.0,this paper sets up a parametrical model of needle device and analyzes the transient temperature distribution and stress distribution in processes of normal knitting,tucking and missing.The results show that the lowest transient temperatures after normal knitting,tucking and missing are just finished are 13 ℃,17 ℃ and 18 ℃ respectively,and highest transient temperatures are 46 ℃,59 ℃ and 63 ℃respectively,which meets the requirements on needle materials;and the highest stress on the needle is 3.12 ×10-4 MPa(compression) along x direction,which meets the strength requirements on needle materials.The conclusions in this paper can be reference for material selection and structural design of magnetic suspended needle.
出处
《针织工业》
北大核心
2012年第12期7-10,72,共4页
Knitting Industries
基金
国家自然科学基金(51175384)
湖北省自然科学基金(2011CDB216)
