摘要
为了实现对气浮动压轴承的静特性能进行研究,文中提出并设计了一种圆锥型气浮动压轴承.在数学模型建立的基础上对其求解域进行了保角变换和斜坐标变换,运用局部积分有限差分对控制方程在斜坐标系下的差分式进行了推导,利用VB对控制方程的静特性进行了数值计算求解.结果表明:螺旋槽能很好实现气浮轴承动压效应,轴承的转速N对其动压效应影响比较大,转速N越高其动压效应越明显;轴承的螺旋角和槽深比对轴承的静特性的影响存在一个最佳参数,轴承的槽数和槽宽比增加到一定值后继续增大对轴承的承载力的影响不明显.实验结果与数值计算结果进行了比较,两者基本一致,为气浮动压轴承的研究与发展提供了一种新结构和新思路.
In order to study the static performance of aerodynamic bearings, the conical aerodynamic bearings was developed and designed in this study. Based on the established mathematical model, the eonformal mapping and oblique coordinate transformation of the calculated regions of the controlling equations were processed and the finite difference formulas of the governing equations were deduced in oblique coordinate system by employing the regional integral finite difference method, the static performance of the controlling equations was analyzed using numerical method by Visual Basic. The results show that the spiral groove can get better dynamic pressure performance of the aerodynamic bearings and the effect of dynamic pressure was more obvious with the increasing bearing speed. The influence of the spiral angle and the groove depth ratio on the static performance had an optimal value and the capacity of the bearing did not increase obviously when the groove number and groove width ratio reached a certain value. Experimental results verified the correctness of numerical calculation and provided a valuable reference of the study and design of the air - floating dynamic pressure bearing.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2014年第1期36-42,共7页
Tribology
基金
国家自然科学基金(50805112)
陕西省教育厅专项基金(12JK0692)资助~~
关键词
气浮动压
数值分析
有限差分
轴承
aerodynamic, numerical analysis, finite difference, bearing
