工业缝纫机针杆的气浮轴承性能数值计算与分析

为了对气浮针杆的小孔节流型轴承的支承性能进行研究，文章在建立数学模型的基础上，运用有限差分法对控 制方程进行数值有限差分的推导，利用MATLAB对针杆在低速和高速的情况下的压力分布进行了数值求解。结果表 明：气浮轴承能够较好地实现工业缝纫机的低速和高速情况下的气浮支承；双排节流小孔的压力分布承载效果比单排节 流小孔好；随着气浮针杆运动速度的变化双排节流小孔的气浮轴承的稳定性较好。对进一步深入对工业缝纫机针杆的 气浮支承研究具有指导意义。

Numerical Simulation and Analysis of Air-Floating Bearing Performance on Needle Bar of Industrial Sewing Machine

ln order to research the bearing performance of orifice type bearing in floating needle bar. on the basis of establishment of its mathematical model. the finite difference of control equation was detruded by using finite difference method. And the pressure distribution of needle bar was programed numerically at low speed and high-speed by MATLAB. The results show that the floating bearing can well achieve the effect of air-float supporting at low-speed and high-speed of industrial sewing machine. the pressure distribution of double throttling orifice is better than single-row throttle holes of bearing, the stability of air bearing with double orifice holes is better with changing the velocity of flotation needle bar. It is also an important guide and reference for the study on air-floating bearing of needle bar in industrial sewing machine.