航空发动机篦齿⁃橡胶涂层机匣碰摩实验

doi:10.7527/S1000-6893.2023.28350

Abstract

Abstract:

To verify the rotor-stator vibration characteristics induced by rubbing between the labyrinth and rubber-coated case for aero-engine booster， a local rubbing experimental device was designed for rotor-stator. The time-frequency domain variations of rotor vibrational displacement， the vibration acceleration of the case and the base， the strain of the case and the elastic support， as well as case temperature were measured and analyzed systematically at various rubbing speeds. The results show that the rotor-stator rubbing features are significantly affected by the wear and fusion of the rubber coating， which results in a variational contacting status between rotor and stator during the rubbing process. The rubbing shows features of high energy， strong transient state and short-time self-separation. A typical period of abrupt change and recovery in short time can be observed for the monitored signals during the rubbing. The rotor-stator coupling vibration is excited by rubbing， inducing resonance at natural frequencies of the rotor and the stator. In the meanwhile， the modulation vibration between the casing natural frequency and rotor frequency is captured.

Key words: aero-engine, vibrational characteristics, local rubbing, rubber coating, combined frequency

CLC Number:

V231.9

Ruixian MA, Xin WANG, Kaiming WANG, Bin LI, Mingfu LIAO, Siji WANG. Rubbing experimental study on labyrinth and rubber⁃coated case for aero⁃engines[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(4): 628350-628350.

Figures/Tables 21

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编号	类型	标准型号
1号	滚棒轴承	SKF NU 1016
2号	深沟球轴承	SKF 6013
5号	滚棒轴承	SKF NJ 2214 ECP

部件	内直径/mm	外直径/mm	长度/mm
风扇盘	60	396.0	50
增压级鼓筒	382	398.0	138
风扇轴	47	71.0	262
涡轮轴	0	50.0	1 772
涡轮盘	289	507.8	20

类型	灵敏度	量程	频响范围	用途
电涡流位移传感器	8 mV/μm	1.5 mm	0~2 600 Hz	转子振动
加速度传感器	100 mV/g	±50 g	0~10 000 Hz	机匣及支座振动
热电偶	40 μV /℃	800 ℃		机匣温度
应变片	2	2%		机匣及弹支应变

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Rubbing experimental study on labyrinth and rubber⁃coated case for aero⁃engines

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