航空发动机拍振问题研究与验证

丁小飞; 廖明夫; 彭丹阳; 韩方军

doi:10.13224/j.cnki.jasp.20220112

航空发动机拍振问题研究与验证

doi: 10.13224/j.cnki.jasp.20220112

1.
西北工业大学动力与能源学院，西安 710072
2.
中国航发沈阳发动机研究所，沈阳 110015
3.
中国航发沈阳黎明航空发动机有限责任公司，沈阳 110043

详细信息

作者简介:
丁小飞（1987-），男，研究员，博士生，主要从事航空发动机整机振动分析和故障诊断的研究

中图分类号: V231.96
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- 被引次数: 0
出版历程
- 收稿日期: 2022-03-04
- 网络出版日期: 2023-06-19

Experimental validation of the beat vibration of aero-engine

1.
School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China
2.
Shenyang Engine Research Institute，Aero Engine Corporation of China，Shenyang 110015，China
3.
Shenyang Liming Aero Engine Corporation Limited，Aero Engine Corporation of China，Shenyang 110043，China

摘要

摘要:
结合拍振理论仿真分析、实测振动信号分析和工程实际拍振总结，讨论了航空发动机存在的3种多源拍振模式；建立了拍振故障识别流程和排除方法。工程试验验证表明：对于航空发动机常见的3种多源耦合拍振模式，当激振频率相差大于3%时，即可消除多源拍振及其引起的振动值波动问题。所建立的流程和方法在某型发动机振动波动问题排故中进行了应用验证，准确识别出低压转子2倍频-高压转子基频耦合拍振。通过控制规律微调低压转子转速，使低压转子2倍频和高压转子基频相差3% ，消除了拍振引起的振动波动，验证了研究结论的正确性。
- 振动 /
- 多源激振 /
- 拍振 /
- 振动波动 /
- 激振频率
Abstract:
Combined with theoretical simulation of the beat vibration, analysis of the measured vibration signal and summary of the actual vibration elimination experience, three multi-source beat vibration modes of aero-engines were discussed. The identification process and the elimination method of the beat vibration fault were established. Experimental verification showed that for the three common multi-source coupling beat modes, the multi-source beat vibration and the vibration fluctuation could be eliminated when the multi-source excitation frequency differed by more than 3%. The proposed process and method were implemented and verified in engine beat vibration and fluctuation trouble-shooting, and the low-pressure rotor 2 times frequency-high-pressure rotor fundamental frequency coupled beat vibration was accurately identified. The low-pressure rotor speed was well-tuned through the control schedule to separate the above two frequencies by 3%. The vibration fluctuations caused by beat vibration was eliminated and the proposed method was validated.
- vibration /
- multi-source excitation /
- beat vibration /
- vibration fluctuation /
- excitation frequency

HTML

图 1 某航空发动机结构简图

Figure 1. Schematic diagram of an aero-engine structure

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图 2 双转子动力学分析模型

Figure 2. Dynamic analysis model of dual rotor

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图 3 状态1振动响应

Figure 3. Vibration response of state 1

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图 4 状态2振动响应

Figure 4. Vibration response of state 2

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图 5 高、低压转子转速比曲线

Figure 5. Speed ratio curve of high pressure rotor and low pressure rotor

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图 6 低压转子倍频与工作转速线关系

Figure 6. Relationship between frequency multiplication of low pressure rotor and working speed line

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图 7 高压转子分频与工作转速线关系

Figure 7. Relationship between frequency division of the high pressure rotor and the working speed line

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图 8 附件传动频率与工作转速线关系

Figure 8. Relationship between the transmission frequency of the accessory system and the working speed line

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图 9 拍振引起的振动波动故障识别和排除流程

Figure 9. Identification process and the method of eliminating the beat vibration fault

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图 10 振动测点位置

Figure 10. Location of vibration measuring points

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图 11 振动曲线

Figure 11. Vibration curves

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图 12 振动速度总量B的频谱云图

Figure 12. Spectrogram of total vibration velocity B

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图 13 工况1波形

Figure 13. Waveform of working condition 1

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图 14 工况2波形

Figure 14. Waveform of working condition 2

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图 15 验证试车振动曲线

Figure 15. Vibration curves for verification test

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表 1 仿真计算状态

Table 1. State of the simulation calculation

状态	f_l/Hz	f_h/Hz
1	221.2	220.3
2	183.4	208.3

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表 2 不平衡量位置和大小

Table 2. Unbalance size and location

施加位置	大小∠相位/（${\rm{ g} }\cdot{\rm{mm} }$，（°））
风扇3级盘	100∠0
低压涡轮1级盘	100∠0
高压转子9级盘	100∠0
高压涡轮盘	100∠0

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表 3 振动测点信息

Table 3. Information of vibration measuring point

监测量	位置	测振方向
低压转子基频振动位移A₁/mm	进气机匣	水平
高压转子基频振动速度V₂/（mm/s）	中介机匣	垂直
振动速度总量B/（mm/s）	中介机匣	水平
高压转子基频振动速度V₃/（mm/s）	涡轮机匣	水平
低压转子基频振动位移A₄/mm	涡轮机匣	垂直

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表 4 拍振发生前后N₂和N₁统计

Table 4. Information of N₂ and N₁ before and after beat vibration occurred

型号	序号	拍振模式	$ {N_2} $	$ {N_1} $	$R $
A	1	1	13245	6618	2.001
	1	拍振排除后	13243	6802	1.947
	2	1	12914	6482	1.992
	2	拍振排除后	12900	6550	1.969
	3	1	13552	6795	1.994
	3	拍振排除后	13576	6993	1.941
	4	1	10975	3680	2.98
	4	拍振排除后	10936	3460	3.16
	5	1	10779	3591	3.001
	5	拍振排除后	10801	3481	3.102
B	6	1	11728	5952	1.97
B	6	拍振排除后	12217	5978	2.04
C	7	2	8865	4442	1.99
C	7	拍振排除后	9047	4431	2.04

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