滑动轴承-转子系统临界转速计算研究
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摘要
临界转速是风力发电机等旋转机械系统设计中的一个重要参数.本文提出了一种计算滑动轴承-转子系统的临界转速的方法.以一个算例分析了临界转速的计算过程,并讨论了集总圆盘与轴段的耦合处理方式及滑动轴承油膜刚度对临界转速的影响.为滑动轴承-转子系统在运行中的稳定性和避免发生共振现象提供了重要理论依据.
Critical speed is an important parameter in the design of rotating mechanical systems such as wind turbines.This paper presents a method for calculating the critical speed of a sliding bearing-rotor system.The calculation process of critical speed is analyzed by an example,And the coupling treatment method of the lumped disc and the shaft segment and the influence of the stiffness coefficient of the sliding bearing on the critical speed are discussed,which provides an important theoretical basis for the stability of the sliding bearing-rotor system during operation and avoiding resonance.
Critical speed is an important parameter in the design of rotating mechanical systems such as wind turbines.This paper presents a method for calculating the critical speed of a sliding bearing-rotor system.The calculation process of critical speed is analyzed by an example,And the coupling treatment method of the lumped disc and the shaft segment and the influence of the stiffness coefficient of the sliding bearing on the critical speed are discussed,which provides an important theoretical basis for the stability of the sliding bearing-rotor system during operation and avoiding resonance.
引文
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[2]于慎波,丛明星,钟双双.永磁同步电主轴临界转速计算[J].机床与液压,2016,44(1):120-123.
[3] Rankine W J M.On the Centrifugal Force of Rotating Shafts[J].The Engineer,1869,4(32):27.
[4] Jeffcott H H.The Lateral Vibration of Loaded Shafts in the Neighbourhood of a Whirling Speed[J].Philosophical Magazine,1919,6(37):304-314.
[5] LiH.Q,ShinY.C.Integrated Dynamic Thermo-mechanical Modeling of High Speed Spindles,Part 2:Solution Procedure and Validations[J].ASME,Journal of Manufacturing Science and Engineering,2004,126(1):148
[6] Yuzhong Cao,Y.Altintas.Modeling of Spindle-bearing and Machine Tool System for Virtual Simulation of Milling Operations[J].International Journal of Machine Tools&Manufacture,2007(47):1342-1050.
[7] Chiwei Lin,Jay F.Tu.Model Based Design of Motorized Spindle Systems to Improve Dynamic Performance at High Speeds[J].Journal of Manufacturing Processes,2007(2).
[8] MB Deepthikumar,AS Sekhar,MR Srikanthan.Balancing of Flexible Rotor with Bow Using Transfer Matrix Method[J].Journal of Vibration and Control,2014,20(2):225-240.
[9]彭必友,殷国富,姜华,等.加工中心电主轴动力学分析理论建模与实验研究[J].四川大学学报(工程科学版),2011,43(4):249-253.
[10]吴文镜,刘强.机床动力学建模的拓展传递矩阵法[J].机械工程学报,2010,46(21):69-75.
[11]毛文贵,刘桂萍,韩旭,等.一种高效的电主轴系统复频率计算方法[J].振动与冲击,2014,33(19):164-168.