摘要
静压主轴高速旋转时,无回油槽静压轴承油腔之间的窜油会随速度增高而加剧,从而导致各油腔压力显著变化。传统经验计算方法由于忽略了窜油影响导致分析结果偏离实际工况,而采用三维流场仿真技术又存在计算效率低不适合工程上计算分析需要的缺点。针对定量供油重载静压轴承,提出了一种考虑速度和窜油影响且适合工程计算分析的油腔压强计算方法。利用所设计并搭建的数控落地铣镗床FB320静压轴承实验台,通过CFD油膜流场数值计算和实验测试对比研究,证实了所提出的解析方法的有效性。
When spindle is running at high speed,the effects of channeling oil on the pressure field of hydrostatic bearing without oil- return groove can not be ignored. Due to traditional experience formulas neglecting the effect of the channeling oil and numerical simulation has low computational efficiency,a new analytical method to calculate the oil cavity pressure of constant current supply heavy- duty hydrostatic bearing is proposed,which takes the effects of speed and channeling oil into consideration. Numerical simulation on oil film pressure field was conducted by commercial CFD software,the CNC floor type milling-boring machine FB320 experimental bench was established and the corresponding expenrimental date was collected. The effectiveness of new analytical method was demonstrated by both simulation results and testing data.
出处
《制造技术与机床》
北大核心
2016年第7期62-66,共5页
Manufacturing Technology & Machine Tool
基金
重型数控机床关键共性技术创新能力平台(2013ZX04013-011)
关键词
重载静压轴承
窜油
解析方法
数值计算
实验
heavy-duty hydrostatic bearing
channeling oil
analytic method
numerical calculation
experiment
