CAJ | 학술논문

采用气体轴承的高速微型燃气轮机具有结构紧凑、做功功率密度大、高转速、轴承功耗低等优点。然而，由于气体轴承润滑介质气体自身的粘度小，导致了气体润滑轴承有承载能力差、摩擦系数小、高速下的稳定性差等劣势。基于气体轴承支承条件下的高速涡轮转子系统，通过试验对比研究了轴承供气压力的提高对转子系统气膜振荡的影响。试验结果表明：气膜振荡发生后，轴承供气压力的提高能够抑制甚至消除气膜振荡，从而控制了混沌运动的幅值边界，最终达到提高轴承—转子系统稳定性的目的。
채용기체축승적고속미형연기륜궤구유결구긴주、주공공솔밀도대、고전속、축승공모저등우점。연이，유우기체축승윤활개질기체자신적점도소，도치료기체윤활축승유승재능력차、마찰계수소、고속하적은정성차등열세。기우기체축승지승조건하적고속와륜전자계통，통과시험대비연구료축승공기압력적제고대전자계통기막진탕적영향。시험결과표명：기막진탕발생후，축승공기압력적제고능구억제심지소제기막진탕，종이공제료혼돈운동적폭치변계，최종체도제고축승—전자계통은정성적목적。
Microturbomachinery (MTM) with gas bearings has the advantages of compact structures, high power density, high speed, low power consumption of bearings, etc. However, gas bearings have the disadvantages of low damping, low load-carrying capacity and poor stability in high speed operation due to the inherently small gas viscosity. Based on the high-speed turbine rotor system supported by gas bearings, experimental investigation of the influence of supply pressure on the gas whip of the rotor system was carried out. The results show that the gas whip can be suppressed and eliminated by increasing the bearing supply pressure. Thus, the amplitude boundary of chaotic motion can be controlled and the stability of the rotor-bearing system can be improved.