CAJ | 학술논문

箔片动压气体轴承（ CFB）采用弹性支承和顶层平箔组成的弹性箔片结构，具有极端环境下良好的抗转子不对中和高速下的抗涡动性能，对于实现低温透平膨胀机高效稳定运行具有重要意义。回顾了国内箔片动压气体径向轴承在低温透平膨胀机中的应用，阐述了分段弹性支承、粘弹性支承、波箔箔片、鼓泡箔片等几种典型箔片轴承在高速透平膨胀机上的研究进展及其支承特性。进一步分析对比了上述轴承对高速低温透平膨胀机转子动力学和气动特性的影响规律，结果显示CFB具有优异的静动态特性，能够实现高速低温透平膨胀机的稳定运转，与此同时保证了低温透平高速转子较小的同步涡动和稳定的轴心位置，在高速透平机械的应用领域具有重要价值。
박편동압기체축승（ CFB）채용탄성지승화정층평박조성적탄성박편결구，구유겁단배경하량호적항전자불대중화고속하적항와동성능，대우실현저온투평팽창궤고효은정운행구유중요의의。회고료국내박편동압기체경향축승재저온투평팽창궤중적응용，천술료분단탄성지승、점탄성지승、파박박편、고포박편등궤충전형박편축승재고속투평팽창궤상적연구진전급기지승특성。진일보분석대비료상술축승대고속저온투평팽창궤전자동역학화기동특성적영향규률，결과현시CFB구유우이적정동태특성，능구실현고속저온투평팽창궤적은정운전，여차동시보증료저온투평고속전자교소적동보와동화은정적축심위치，재고속투평궤계적응용영역구유중요개치。
The compliant foil bearing (CFB) with flexible top plate surface and elastic support has excellent resist-ance against rotor inclination under extreme environments and excellent resistance against eddy motion at high speed. The highly effective and stable operation of a cryogenic expander is of great significance.In this paper, the applica-tion of CFB in the cryogenic turboexpander in China is reviewed and the research progress of CFBs such as piece-wise CFB, visco-elastic CFB, conventional bump type CFB and protuberant CFB in high-speed turboexpander and their support characteristics is explained.In addition, this paper analyzes the effect of the bearings on the rotor dynamics and aerodynamic characteristics of the high-speed cryogenic turboexpander.The results showed that CFBs have excel-lent static and dynamic performance.It can also realize the stable operation of high-speed cryogenic turboexpander and ensure a small synchronous eddy motion and a stable position of the axial center of high-speed cryogenic turboex-pander.Therefore, it has an important value in the application field of the high-speed turbine machinery.