Field balancing technology for low pressure rotors ofhigh bypass ratio turbofan engines
-
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.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.
-
[1] Thompson B D,Badgley R H,Raczkowski R.Methods and procedures for trim balancing the LM2500 marine gas turbine in the test cell and aboard ship[C]∥Porceedings of ASME International Gas Turbine and Aeroengine Congress and Exposition.Toronto:American Society of Mechanical Engineers,1989:1-8. [2] Thompson B D.Optimization of LM2500 gas generator and power turbine trim-balance techniques[J].Journal of Engineering for Gas Turbines and Power,1992,114(2):222-229. [3] Thompson B D,Grobler J.Development US navy gas turbine vibration analysis expertise:LM2500 vibration and trim balance[C]∥Proceedings of ASME Turbo Expo.Copenhagen:American Society of Mechanical Engineers,2012:243-253. [4] 晏砺堂,晓光.CFM56-3发动机本机平衡技术[J].国际航空,1989(3):32-34.YAN Litang,XIAO Guang.CFM56-3field balancing technology of engines in field[J].International Aviation,1989(3):32-34.(in Chinese) [5] 王凤,张德志,刘洪波.民用大涵道比涡扇发动机本机平衡方法研究[R].北京:第2届民用飞机制造技术及装备高层论坛,2010. [6] 陈炳贻.航空发动机平衡工艺技术的发展[J].推进技术,1998,19(4):106-110.CHEN Bingyi.Development of balance technology for aeroengines[J].Journal of Propulsion Technology,1998,19(4):106-110.(in Chinese) [7] 章璟璇.柔性转子动平衡及转子动力特性的研究[D].南京:南京航空航天大学,2005.ZHANG Jingxuan.Research on flexible rotor dynamic balancing and rotor dynamical characteristic[D].Nanjing:Nanjing University of Aeronautical and Astronautics,2005.(in Chinese) [8] 唐广.航空发动机高速柔性转子动力特性和平衡技术研究[D].长沙:湖南大学,2012.TANG Guang.The investigation of dynamic characteristics and balance technology of a high speed flexible rotor of aeroengine[D].Changsha:Hunan University,2012.(in Chinese) [9] 邓旺群,王桢,舒斯荣,等.涡轴发动机细长柔性转子动力特性及高速动平衡技术研究[J].振动与冲击,2012,31(7):162-165.DENG Wangqun,WANG Zhen,SHU Sirong,et al.Dynamic characteristics and high speed dynamic balance technique for a power turbine rotor of a turbo-shaft engine[J].Journal of Vibration and Shock,2012,31(7):162-165.(in Chinese) [10] 廖明夫.航空发动机转子动力学[M].西安:西北工业大学出版社,2015. [11] 张春雷.旋转机械状态监测与现场动平衡[D].西安:西北工业大学,2002.ZHANG Chunlei.Condition monitoring of rotating machinery and rotor balancing in-situ[D].Xian:Northwestern Polytechnical University,2002.(in Chinese) [12] 王四季,廖明夫.转子现场动平衡技术研究[J].机械科学与技术,2005,24(12):1510-1514.WANG Siji,LIAO Mingfu.Study of techniques for rotor balance in situ[J].Mechanical Science and Technology,2005,24(12):1510-1514.(in Chinese) [13] 张凤均.LabWindows/CVI开发入门与进阶[M].北京:北京航空航天大学出版社,2001. [14] 王建新,杨世凤,隋美丽.LabWindows/CVI测试技术及工程应用[M].北京:化学工业出版社,2006. [15] 李明,廖明夫,王四季.风力机现场动平衡的信号预处理方法研究[J].噪声与振动控制,2014,34(3):160-164.LI Ming,LIAO Mingfu,WANG Siji.Study on signal preprocessing method for dynamic balance of wind turbines[J].Noise and Vibration Control,2014,34(3):160-164.(in Chinese) [16] 徐士良.常用算法程序集:C语言描述[M].北京:清华大学出版社,2004. [17] 陈曦,廖明夫,李全坤.带套齿联轴器的转子系统动力学特性研究[J].推进技术,2015,36(7):1069-1078.CHEN Xi,LIAO Mingfu,LI Quankun.Dynamic characteristics of a rotor system with a spline coupling[J].Journal of Propulsion Technology,2015,36(7):1069-1078.(in Chinese) [18] Goodman T P.A least-squares method for computing balance corrections[J].Journal of Manufacturing Science and Engineering,1964,86(3):273-277.
点击查看大图
计量
- 文章访问数: 1069
- HTML浏览量: 5
- PDF量: 585
- 被引次数: 0