高速磁悬浮鼓风机涡轮锁紧装置设计分析及试验
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摘要
高速磁悬浮鼓风机由于采用磁轴承支撑和高速直驱的工作方式,相比于传统鼓风机可以显著提高工作效率,具有清洁、静音、维护费用低,无需油膜润滑等优点,但是相对于传统鼓风机,高速磁悬浮鼓风机对涡轮叶片的锁紧装置有特殊的要求。针对一台额定功率为315kW额定转速为30000r/min的高速磁悬浮鼓风机的涡轮锁紧装置进行设计和动力学分析,建立其在加速过程、稳速运行、降速过程和意外跌落过程等4种工况下的力学模型,分析了其工作原理与失效的原因,并针对磁悬浮转子意外跌落的冲击载荷进行了结构上的改进设计,使其满足在所有工况下的可靠锁紧。改进后的锁紧装置通过试验证明了其有效性和可行性,本研究可以为同类机构的设计提供参考。
High-speed maglev blower due to the workings of a high-speed direct drive, compared to traditional blower can significantly improve the work efficiency, furthermore due to the magnetic suspension bearing supporting without oil film lubrication,has the advantages of cleaning, ultra-quiet, low maintenance cost and so on. However, compared with the traditional turbine installation, high speed maglev blower has special request for turbine locking device to meet the operating requirements of high speed and high stability. Based on a rated power 315 kW high-speed maglev blower with rated speed of 30 000 r/min, its turbine locking device has been analyzed. The mechanical models of four conditions such as accelerating process, steady speed operation, slow down and accidental dropping process have been listed to analyze its working principle and the possibility of failure. Finally, the turbine locking device has been improved for the magnetic suspension rotor impact load, and the reliable locking under all conditions has been proved by practical application. It may provide reference for the similar mechanism.
High-speed maglev blower due to the workings of a high-speed direct drive, compared to traditional blower can significantly improve the work efficiency, furthermore due to the magnetic suspension bearing supporting without oil film lubrication,has the advantages of cleaning, ultra-quiet, low maintenance cost and so on. However, compared with the traditional turbine installation, high speed maglev blower has special request for turbine locking device to meet the operating requirements of high speed and high stability. Based on a rated power 315 kW high-speed maglev blower with rated speed of 30 000 r/min, its turbine locking device has been analyzed. The mechanical models of four conditions such as accelerating process, steady speed operation, slow down and accidental dropping process have been listed to analyze its working principle and the possibility of failure. Finally, the turbine locking device has been improved for the magnetic suspension rotor impact load, and the reliable locking under all conditions has been proved by practical application. It may provide reference for the similar mechanism.
引文
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[3]边靖,王晓康,芦汉超,等.市政污水行业中鼓风机的应用分析[J].中国给水排水,2015,31(24):19-24.BIAN Jing,WANG Xiaokang,LU Hanchao,et al.Application of blower in municipal wastewater industry[J].China Water&Wastewater,2015,31(24):19-24.
[4]吴绪军.磁悬浮离心式鼓风机在污水厂节能降耗中的应用[J].环境与发展,2015,27(2):82-84.WU Xujun.Application of high-speed blower saving energy in wastewater treatment plant[J].Environment and Development,2015,27(2):82-84.
[5]王飏,王军,王瓯.电磁悬浮轴承的发展及在鼓风机上的应用前景[J].风机技术,2008(2):70-72.WANG Yang,WANG Jun,WANG Ou.Development of magnetic floating bearing and its application prospect for blowers[J].Compressor Blower&Fan Technology,2008(2):70-72.
[6]陈琪,刘刚,郑世强.基于自适应变步长最小均方差算法的磁悬浮电动机自动平衡方法[J].机械工程学报,2015,51(15):119-127.CHEN Qi,LIU Gang,ZHENG Shiqiang.Automatic balancing for magnetically suspended high-speed motor based on adaptive variable step-size LMS algorithm[J].Journal of Mechanical Engineering,2015,51(15):119-127.
[7]汤恩琼,房建成,郑世强.磁悬浮电动机柔性转子振动控制与试验研究[J].机械工程学报,2015,51(1):106-116.TANG Enqiong,FANG Jiancheng,ZHENG Shiqiang.Vibration control and experimental study of flexible rotor in magnetically suspended motor[J].Journal of Mechanical Engineering,2015,51(1):106-116.
[8]冯锐,郑世强,房建成.高速磁悬浮电动机对拖试验中转子不平衡量在线辨识与振动控制[J].机械工程学报,2014,50(3):71-77.FENG Rui,ZHENG Shiqiang,FANG Jiancheng.Online identification and unbalanced vibration control of high-speed magnetically levitated motor for drag test[J].Journal of Mechanical Engineering,2014,50(3):71-77.
[9]ZHENG S,CHEN Q,REN H.Active balancing control of amb-rotor systems using a phase-shift notch filter connected in parallel mode[J].IEEE Transactions on Industrial Electronics,2016,63(6):3777-3785.
[10]YU W T,LI H W,LIU S Q,et al.The design for high-power maglev blower controller[J].Advanced Materials Research,2013,712-715:2747-2752.
[11]CHEN S,LIU G,ZHENG S.Sensorless control of bldcm drive for a high-speed maglev blower Using a low pass filter[J].IEEE Transactions on Power Electronics,2017,32(11):8845-8856.
[12]HONG D K,LEE K C,JEONG Y H,et al.Magnetic field and rotordynamic analysis of 30 krpm 220 kW rated high speed motor for blower supported magnetic bearing[C]//Electromagnetic Field Computation.IEEE,2010:1-1.
[13]HUANG Z,FANG J.Multiphysics design and optimization of high-speed permanent-magnet electrical machines for air blower applications[J].IEEETransactions on Industrial Electronics,2016,63(5):2766-2774.
[14]JASTRZEBSKI R P,SMIRNOV A,NERG J,et al.Laboratory testing of an active magnetic bearing supported permanent magnet 3.5 kW blower prototype[C]//European Conference on Power Electronics and Applications.IEEE,2013:1-9.
[15]杨家礼,郭小平,黄舜.一种转子联轴器锁紧装置结构分析[J].燃气轮机技术,2013,26(3):18-20.YANG Jiali,GUO Xiaoping,HUANG Shun.The analysis on a locking structure of rotor shaft coupling[J].Gas Turbine Technology,2013,26(3):18-20.
[16]田锐,张虹,胡辽平,等.涡轮增压器压气机叶轮锁紧螺母扭力设计计算方法研究[J].机械设计与制造,2014(4):4-6.TIAN Rui,ZHANG Hong,HU Liaoping,et al.The research on the torque design and calculation method of locknut on turbochager compressor impeller[J].Machinery Design&Manufacture,2014(4):4-6.