大涵道比商用发动机风扇转子本机平衡技术研究与试验

万召; 陈亚龙; 周怡; 虞磊; 陈景阳; 刘显波

doi:10.13224/j.cnki.jasp.20230599

大涵道比商用发动机风扇转子本机平衡技术研究与试验

doi: 10.13224/j.cnki.jasp.20230599

万召^1,,
陈亚龙¹,
周怡¹,
虞磊¹,
陈景阳¹,
刘显波^2,*, ,

1.
中国航发商用航空发动机有限责任公司，上海 200241
2.
上海交通大学船舶海洋与建筑工程学院，上海 200240

基金项目: 国家重点基础研究发展计划（2023YFF0713400）；国家自然科学基金（12272218）

详细信息

作者简介:
万召（1981-），男，高级工程师，博士，主要从事叶轮机械结构强度方面的研究。E-mail：rickywan@163.com

通讯作者:
刘显波（1986-），男，副教授，博士，主要从事转子动力学、非线性振动与控制方面的研究。E-mail：liuxianbo@sjtu.edu.cn

中图分类号: V231.1
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- 被引次数: 0
出版历程
- 收稿日期: 2023-09-17
- 网络出版日期: 2024-08-08

Study and verification of on-site fan rotor balance of high bypass ratio aero-engine

WAN Zhao^1
,,
CHEN Yalong¹,
ZHOU Yi¹,
YU Lei¹,
CHEN Jingyang¹,
LIU Xianbo^{2,*
, ,}

1.
Commercial Aircraft Engine Corporation Limited，Aero Engine Corporation of China，Shanghai 200241，China
2.
School of Naval Architecture，Ocean and Civil Engineering，Shanghai Jiao Tong University，Shanghai 200240，China

摘要

摘要:
研究了大涵道比商用航空发动机风扇转子本机平衡的理论和工程方法，研究了影响平衡精度和效率的关键问题，包括幅值时变的转速/键相位的识别、传感器振动响应与转子实际不平衡方位的关系、平衡螺钉的高效优化排布方法等。分析了某型大涵道比商用发动机在整机试验时风扇转子系统的振动响应，讨论了试重大小和方位的确定方法，研究了动不平衡量随转速等的变化规律，通过一次动平衡使得风扇转子的振动下降超过80%，且低压涡轮的振动下降超70%，表明了动平衡理论和工程方法的正确性，也表明风扇转子的动平衡有利于降低低压涡轮转子的振动，相关方法已应用于航空发动机科研试车。
- 本机平衡 /
- 影响系数法 /
- 键相位识别 /
- 振动矢量 /
- 平衡螺钉排布
Abstract:
The theory and engineering approach for on-site balancing of fan rotors in high-bypass ratio aero-engines were studied to address crucial aspects such as identifying variable amplitude speed impulse signals, establishing the correlation between vibration signals and the angular location of rotor imbalance, and expeditious balancing screw arrangement. Additionally, the investigation scrutinized fan rotor vibration in high-bypass ratio aero-engines, and a method was proposed to ascertain trial weight quantity and angle. The research also examined the trajectory of imbalance variation with rotor speed. Following a single on-site balance, fan rotor vibration experienced a remarkable reduction of over 80%, while low-pressure turbine rotor vibration decreased by more than 70%. This successful outcome validated both the balance theory and engineering methodology. Furthermore, it underscored the advantages of minimizing fan rotor vibration in mitigating vibrations in the low-pressure turbine rotor.
- on-site balance /
- influence coefficient method /
- key phase identification /
- vibration vector /
- balance screw arrangement

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图 1 影响系数的矢量作图法

Figure 1. Vector demonstration of influence coefficient method

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图 2 基频幅值、相位的分析流程

Figure 2. Steps for vibration amplitude and phase analysis of the fundamental frequency

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图 3 低压转子转速、键相测试示意图

Figure 3. Speed tooth wheel and key phase testing

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图 4 实测的测速音轮的转速脉冲信号

Figure 4. Tested signal of speed tooth wheel with variable amplitude

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图 5 传感器测得的振动响应与转子不平衡之间的关系

Figure 5. Relation between tested vibration and rotor unbalance

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图 6 螺钉排布的矢量分解方法

Figure 6. Vector decomposition method for balance screw arrangement

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图 7 叶片质量矩称量及排布示意图

Figure 7. Blade moment measuring and arrangement

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图 8 风扇帽罩及平衡孔示意图

Figure 8. Spinner and the balance holes location

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图 9 低压转子-支承系统及相关测点

Figure 9. Monitoring points of low pressure rotor vibration

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图 10 工作转速范围内转子临界转速振型

Figure 10. Vibration modes of first two rotor critical speed

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图 11 1#支点初始振动的频谱图

Figure 11. Vibration spectrum of No.1 bearing housing of fan rotor

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图 12 1#支点水平振动的基频幅值和相位

Figure 12. Bode diagram of horizontal vibration of No.1 bearing housing

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图 13 初始振动与试重后1#支点水平振动曲线

Figure 13. Bode diagram No.1 bearing housing before and after trial weight installation

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图 14 动平衡矢量作图法与不平衡量随转速的变化曲线

Figure 14. Vector map of dynamic balance and unbalanced weights calculation and the trend at different speeds

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图 15 螺栓排布情况

Figure 15. Balance screws arrangements

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图 16 动平衡前后1#支点水平振动响应

Figure 16. Vibration comparison of No.1 bearing housing before and after dynamic balance

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图 17 动平衡前后5#支点（涡轮端）水平振动响应

Figure 17. Horizontal vibration comparison of No.5 bearing housing （turbine end） before and after dynamic balance

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表 1 平衡螺钉规格

Table 1. Table of balance screws

组别	质径积/（g·mm）	组别	质径积/（g·mm）
P1	10214.5	P5	23296
P2	13725.7	P6	26166
P3	17076.5	P7	29752
P4	20314.6

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表 2 动平衡计算结果列表（去除试重）

Table 2. Table of dynamic balance calculation results （excluding trial weight）

相对转速/%	初始振动		试重后振动		平衡计算结果M_x/ （（g·mm） ∠相位）
相对转速/%	取值区间代号	V₀ （振幅∠相位）	取值区间代号	V₁（振幅∠相位）	平衡计算结果M_x/ （（g·mm） ∠相位）
34	A1	38.2∠141°	B1	18.7∠121°	29948∠337°
56	A2	41.2∠68°	B2-1	23.6∠5°	38186∠343°
56	A2	41.2∠68°	B2-2	33.2∠75°	77103∠18.5°
70	A3	45.5∠85°	B3-1	31.8∠96°	49396∠17°
70	A3	45.5∠85°	B3-1	33.9∠95°	56251∠21°
70	A3	45.5∠85°	B3-2	34.2∠97°	54791∠25°
70	A3	45.5∠85°	B3-3	31.7∠96°	49366∠17°
72	A4-1	59.5∠87°	B4-1	42.6∠88°	59526∠355°
72	A4-2	60.7∠74°	B4-1	42.6∠88°	47358∠21°
72	A4-3	58.4∠84°	B4-1	42.6∠88°	61247∠3°
72	A4-1	59.5∠87°	B4-2	43.7∠91°	61862∠5°
72	A4-2	60.7∠74°	B4-2	43.7∠91°	44632∠28°
72	A4-3	59.4∠83°	B4-2	43.7∠91°	57565∠16°

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