高速透平机械全金属鼓泡箔片动压气体轴承稳定性研究

发布时间：2018-11-24 08:16

【摘要】：为了验证高速透平机械中鼓泡箔片轴承完全取代传统静压轴承的可行性,将全金属鼓泡箔片径向轴承和鼓泡箔片止推轴承同时应用在主轴直径为25mm、产量为150m3/h工业制氧机用的高速透平膨胀机上,进行了全动压鼓泡箔片轴承透平膨胀机的实验研究,实验用的鼓泡箔片径向轴承采用周向叉排,鼓泡箔片止推轴承采用径向叉排。实验结果表明:透平转子在全动压鼓泡箔片轴承透平膨胀机上能够稳定运行,表现出良好的动态性能和稳定性;由于良好的柔弹性结构、惯性小等特点,鼓泡箔片轴承能够迅速适应转子运动;随着转子转速的升高,转子轴心轨迹由不规则半圆环状逐渐变成规则的圆环状,在多次重复性实验中轨迹重复性较好;鼓泡箔片轴承可有效抑制转子涡动,转子能够在高转速下持续稳定运行。
[Abstract]:In order to verify the feasibility of completely replacing the traditional static bearing with bubbling foil bearing in high-speed turbine machinery, the full metal foaming foil radial bearing and bubble foil thrust bearing are applied to the spindle diameter of 25mm at the same time. The experimental study on the full dynamic pressure bubbling foil bearing turbine expander for the high speed turbine expander used in the 150m3/h industrial oxygen generator was carried out. The radial bearing of the bubble foil used in the experiment adopted circumferential fork row. Foaming foil thrust bearing adopts radial fork row. The experimental results show that the turbine rotor can run stably on the fully dynamic bubbling foil bearing turbine expander, showing good dynamic performance and stability. Because of its good flexible elastic structure and small inertia, foaming foil bearings can adapt to rotor motion quickly. With the increase of rotor speed, the axis trajectory of the rotor gradually changes from irregular semicircular to regular circular, and the trajectory is more reproducible in repeated experiments. Bubble foil bearing can restrain rotor vortex effectively and the rotor can run steadily at high speed.
【作者单位】：西安交通大学能源与动力工程学院;新疆自治区煤炭科学研究所;
【基金】：国家自然科学基金资助项目(51406157) 江苏省自然科学基金资助项目(BK20140408) 新疆科技厅创新发展专项基金资助项目(2015013)
【分类号】：TH133.3

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