加工误差对静压气浮主轴静动态性能的影响
Influence of Manufacturing Errors on Static and Dynamic Performances of Aerostatic Spindle
李瑞瑞 1李运堂 1王鹏峰 2叶月亮 1李孝禄 1陈源1
作者信息
- 1. 中国计量大学 机电工程学院,杭州 310018
- 2. 中国计量大学 现代科技学院 机电工程学院,杭州 310018
- 折叠
摘要
为了改善静压气浮主轴静动态性能,研究了非均匀分布变节流孔直径静压气浮主轴结构.基于有限差分和线性小扰动法分析节流孔直径和分布不均匀性对主轴承载能力的影响,研究了轴套存在周向或轴向加工误差(正弦波纹、矩形波纹和三角波纹)对主轴静动态性能的影响.结果表明:节流孔直径系数为0.9～0.95 时,承载能力提升最明显;周向或轴向加工误差有助于提高主轴承载能力;矩形和三角形波纹提高新型主轴承载能力更显著;轴向矩形波纹、三角波纹更有助于提高主轴稳定性;随着加工误差幅值增大,主轴稳定性降低.
Abstract
An aerostatic spindle is studied in which the its orifices are distributed unevenly and have different diameters and to improve its static and dynamic characteristics.The effects of different orifice diameters and uneven distributions on bearing load capacity are analysed with Finite Difference Method combined with Linear Perturbation Method.The influences of circumferential or axial manufacturing errors(sine waviness,square waviness,triangular waviness)in sleeve on static and dynamic performances are analysed.The results indicate that the bearing capacity of aerostatic spindle increased most significantly if orifice diameter coefficient is within 0.9～0.95.Circumferential and axial manufacturing errors improve bearing capacity.Square waviness and triangular waviness have more significant influence on bearing capacity.Axial square waviness and triangular waviness are hopeful for dissipating the whirling energy and improving the stability of the spindle.The larger the amplitude of manufacturing errors is,the worse the stability of the spindle is.
关键词
静压气浮主轴/有限差分法/线性小扰动法/加工误差/静态性能/动态性能Key words
aerostatic spindle/finite difference method/linear perturbation method/manufacturing errors/static characteristics/dynamic characteristics引用本文复制引用
基金项目
国家自然科学基金(51675498)
浙江省省属高校基本科研业务费专项(2020YW29)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据