Dynamic characteristics of misaligned gear coupling-bearing-rotor system
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摘要: 为适应液体火箭发动机高速涡轮泵模拟运转需求,内啮合齿轮联轴器被设计作为涡轮快速起动过程运动传递的核心零部件;实际中联轴器前后两轴的不对中程度对试验转子动态性能产生了极大影响。构建了此类特定工程应用的内啮合齿轮联轴器刚度阻尼计算模型、多种不对中工况的表征方法及其附加力与力矩的求解模型、考虑不对中因素的联轴器-滚动轴承-双转子动力学分析模型,耦合上述模型数值求解得到了不对中参数对试验转子动力学性能的影响规律,包括临界转速、振动响应等,与文献对比完成了模型验证。结果表明:构建模型的动态响应误差小于15%;缩短联轴器和提高涡轮和试验转子同轴对中量可较好地降低系统的动力响应值,可有效地降低转子碰磨故障现象的产生,且其对双转子系统临界转速的影响较小,研究将为高速涡轮泵的设计和安全运行提供理论和试验参考。Abstract: For meeting the requirement of the simulated operation of a high-speed turbopump in liquid rocket engine,an internal gear coupling was designed as the key component to transfer the motion during the fast start-up stage.The misalignment of the center axis between the turbo rotor and the test rotor had a significant impact on the dynamics performance of the test rotor.The stiffness and damping theoretical model of the internal gear coupling,the model for solving additional forces and moments of the gear coupling under various misalignment conditions,and the dynamic model considering the misalignment factor for double rotor system coupling the gear coupling and the rolling bearing were proposed.The influences of the misalignment parameters on the dynamic performance (critical speed and vibration response) of the test rotor were obtained by numerical solution of the above coupled models,and the model verification was completed by comparing with the literature.The results showed the vibration response error between the proposed model and literature was less than 15%,and shortening the gear coupling length and increasing the center axis alignment can reduce effectively the dynamic response of the rotor system,and had little effect on the critical speed of the double rotor system.The research results provide a theoretical and experimental reference for the design and safe operation of high-speed turbopump.
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Key words:
- gear coupling /
- misalignment /
- rotor dynamics /
- critical speed /
- vibration response
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[1] MOGHE S M,MAHURE A N.Study of vibration response of coupling under misalignment condition:a review[J].International Journal of Research in Advent Technology,2017,5(4):50-53. [2] 山内进吾,染谷常雄,刘晓雨.齿轮联轴器轴系的自激振动[J].齿轮,1984,8(6):51-54. [3] MARMOL R A.Spline coupling induced nonsynchronous rotor vibrations[J].ASME Journal of Mechanical Design,1980,102(1):168-176. [4] REDMOND I.Study of a misaligned flexibly coupled shaft system having nonlinear bearings and cyclic coupling stiffness-Theoretical model and analysis[J].Journal of Sound & Vibration,2010,329(6):700-720. [5] GUO Y,LAMBERT S,WALLEN R,et al.Theoretical and experimental study on gear-coupling contact and loads considering misalignment,torque,and friction influences[J].Mechanism & Machine Theory,2016,98:242-262. [6] TUCKMANTEL F W D S,CAVALCA K L.Vibration signatures of a rotor-coupling-bearing system under angular misalignment[J].Mechanism & Machine Theory,2019,133:559-583. [7] 李明,姜培林,虞烈.轴承-转子-齿轮联轴器系统的振动研究[J].机械工程学报,1998,34(3):39-45. [8] 李明,李自刚.联轴器不对中故障转子系统的动力学试验[J].振动.测试与诊断,2015,35(2):345-351. [9] 赵广,刘占生,叶建槐,等.转子-不对中花键联轴器系统动力学特性研究[J].振动与冲击,2009,28(3):78-82. [10] 赵广,郭嘉楠,王晓放,等.转子-齿式联轴器-轴承系统不对中动力学特性[J].大连理工大学学报,2011,51(3):338-345. [11] 廖仲坤,陈果,王海飞.套齿联轴器对航空发动机振动特性的影响[J].中国机械工程,2015,26(10):1312-1319. [12] 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):1069-1077. [13] 韩清凯,王美令,赵广,等.转子系统不对中问题的研究进展[J].动力学与控制学报,2016,14(1):1-13. [14] 万召,荆建平,孟光,等.弹性联轴器不对中转子-轴承系统的非线性动力特性及稳定性研究[J].振动与冲击,2012,31(24):20-25. [15] PALAZZOLO A B,LOCKE S R,MICHAEL C,et al.Gear coupling misalignment induced forces and their effects on machinery vibration [C]∥ Turbomachinery and Pump Symposia .College Station,US:Texas A&M University,1992:83-96.[16] 沈润杰,梅德庆,陈子辰,等.齿轮联轴器附加力建模及实验研究[J].浙江大学学报(工学版),2001,35(2):80-84. [17] 胡航领,何立东,王晨阳.2N和N+1支撑三跨转子在三种联轴器下的振动特性实验研究[J].振动与冲击,2017,36(5):164-168. [18] 高腾,荆建平,梅庆,等.花键连接转子系统稳定性研究[J].噪声与振动控制,2016,36(2):40-45. [19] 赵玫.机械振动与噪声学[M].北京:科学出版社,2011. [20] 张伟社,冯守卫.直齿轮轮齿刚度的简化计算[J].现代制造工程,2004,3:72-74. [21] LEE Y S,LEE C W.Modelling and vibration analysis of misaligned rotor-ball bearing systems[J].Journal of Sound & Vibration,1999,224(1):17-32. [22] 《航空发动机设计手册》总编委员会.航空发动机设计手册第12册 传动及润滑系统[M].北京:航空工业出版社,2002.
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