摘要
以缝纫机气浮针杆表面形状的测量结果和变化规律为基础,通过建立接近真实情况下的针杆表面数值模型和缝纫机气浮针杆动态控制方程,分析针杆往复运动下数据模型的动态变化原理,采用有限差分法对理想针杆和带有形状误差的针杆的动态性能进行仿真分析。结果表明:带有形状误差的针杆表面在动态情况下可以产生相对明显的动压效应,产生较大的气膜承载力。
Based on the measurement results of air flotation sewing machine needle bar and surface form changes, a numerical model close to the real case surface of needle bar was established, and the dynamic control equation of air flotation sewing machine needle bar was deduced. The dynamic change principle of the data model for needle bar reciprocating motion was analyzed, solves the air flotation sewing machine needle bar dynamic control equation using the finite difference method. Compared simulated performance between the ideal needle bar and the one with form error. The results show that： the surface of the needle bar with form error can be produced relatively obvious dy- namic pressure effect in dynamic situations, provided a larger capacity gas film.
出处
《润滑与密封》
CAS
CSCD
北大核心
2014年第4期74-78,97,共6页
Lubrication Engineering
基金
西安市科技局技术推广项目(CXY1301)
关键词
形状误差
气浮针杆
动态性能
有限差分法
form error
air flotation needle bar
dynamic performance
finite difference method
