| 大涵道比涡扇发动机低压转子现场动平衡技术 |
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| 引用本文： | 陈曦,廖明夫,张霞妹,王四季.大涵道比涡扇发动机低压转子现场动平衡技术[J].航空动力学报,2017,32(4):808-819. |
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| 作者姓名： | 陈曦 廖明夫 张霞妹 王四季 |
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| 作者单位： | 西北工业大学 动力与能源学院,西安 710129 |
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| 摘 要： | 针对大涵道比涡扇发动机,建立基于最小二乘影响系数的低压转子现场动平衡方法,研制动平衡测试系统,搭建模型转子实验器,开展相关动力学特性计算与动平衡实验,并在真实发动机台架实验中验证其正确性、有效性与可靠性.结果表明:采用跟踪高脉冲、定比例方波的方法识别高齿信号,并对振动信号进行整周期截取、插值处理与多次平均,能够保证转速与相位测量的准确度与稳定性.1号支点对风扇不平衡较为敏感,5号支点对涡轮不平衡较为敏感,而2号支点对两者均敏感,但对风扇不平衡的敏感度更大.在保证动平衡效果的前提下,与三圆平衡法相比,低压转子现场动平衡技术能够提高操作便捷性,减少起停次数,降低时耗,具有一定的工程应用前景.
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| 关 键 词： | 现场动平衡 高齿信号识别 影响系数法 低压转子 涡扇发动机 大涵道比 |
| 收稿时间： | 2015/7/28 0:00:00 |
Field balancing technology for low pressure rotors ofhigh bypass ratio turbofan engines |
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| CHEN Xi,LIAO Ming-fu,ZHANG Xia-mei,WANG Si-ji.Field balancing technology for low pressure rotors ofhigh bypass ratio turbofan engines[J].Journal of Aerospace Power,2017,32(4):808-819. |
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| Authors: | CHEN Xi LIAO Ming-fu ZHANG Xia-mei WANG Si-ji |
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| Abstract: | For high bypass ratio turbofan engines, a field balancing method for low pressure rotors was established based on least-square influence coefficient, and a testing system for dynamic balancing was developed. After a model rotor experiment rig was built up, relevant calculation of dynamic characteristics and balancing experiments were conducted. And the correctness, validity and reliability of the field balancing technology were verified in a bench experiment of actual engine. Results indicated that using the method of tracking high pulse and transforming square wave according to fixed proportion can identify the high-tooth signal, and integral period interception, interpolation processing and multiple times averaging of vibration signals can ensure the accuracy and stability of speed and phase measurement. The No.1 support was more sensitive to the fan unbalance, and the No.5 support was more sensitive to the turbine unbalance, while the No.2 support was sensitive to both unbalances, and the sensitivity to the fan unbalance was greater. Under the premise of ensuring the balancing effectiveness, when compared with the three-circle balancing method, the field balancing technology for low pressure rotors can also facilitate the operational convenience, decrease the number of startups and shutdowns, and achieve less time consumption with a bright prospect in engineering application. |
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| Keywords: | field balancing high-tooth signal identification influence coefficient method low pressure rotor turbofan engine high bypass ratio |
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