基于Romax的高速齿轮转子临界转速的计算与分析
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摘要
高速齿轮转子应用广泛,其动态特性影响着齿轮箱的运转稳定性和可靠性。通过Romax软件,对两种振动异常的高速齿轮转子进行动态分析,得到了两种转子的各阶固有频率,以及轴承支撑参数对各阶固有频率的影响。发现改进前两高速齿轮转子的运行转速接近1阶临界转速,同时在Romax中对轴系结构进行改进,使其工作转速远离临界转速;改进后试验表明,两转子各振动指标正常,齿轮箱运转良好;为高速齿轮转子的临界转速计算提供了一种精确有效的方法。
The high speed gear rotor is widely used,and its dynamic property affects the stability and reliability of gearbox. The dynamic analysis of two kinds of high-speed gear rotor with abnormal vibration are proceeded by Romax software,the each nature frequency of two rotors and the influence of the bearing supporting parameter on each nature frequency are obtained. It is found that the running speed of first two high speed gear rotor before improvement is approached to the first order critical speed. At the same time,the shaft system structure is improved in the Romax to make sure the running speed faraway from critical speed. The improved test result indicates that the each vibration index is normal,and the running condition of gearbox is pretty well. A method for accurate calculating the critical speed of high-speed gear rotor is provided.
The high speed gear rotor is widely used,and its dynamic property affects the stability and reliability of gearbox. The dynamic analysis of two kinds of high-speed gear rotor with abnormal vibration are proceeded by Romax software,the each nature frequency of two rotors and the influence of the bearing supporting parameter on each nature frequency are obtained. It is found that the running speed of first two high speed gear rotor before improvement is approached to the first order critical speed. At the same time,the shaft system structure is improved in the Romax to make sure the running speed faraway from critical speed. The improved test result indicates that the each vibration index is normal,and the running condition of gearbox is pretty well. A method for accurate calculating the critical speed of high-speed gear rotor is provided.
引文
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[7]朱新龙,熊禾根.基于Romax的减速箱箱体有限元模态分析[J].机械传动,2013,37(2):94-96.
[8]American Petroleum Institute.Special Purpose Gear Units for Petroleum,Chemical and Gas Industry Services,API 613-2003[S].Washington:American Petroleum Institute,2003:19-20.
[2]王东华,刘占生,窦唯.一种改进的转子系统临界转速调整方法[J].航空动力学报,2008,23(8):1449-1454.
[3]陈双涛,侯予,陈汝刚,等.高速透平膨胀机临界转速的计算与分析[J].西安交通大学学报,2010,44(9):33-37.
[4]黄文俊,朱晓农,于洋,等.离心风机转子临界转速计算方法的对比分析[J].流体机械,2014,42(10):37-40.
[5]钟一谔,何衍宗,王正,等.转子动力学[M].北京:清华大学出版社,1987:143-165.
[6]张明,江志农,朱俊,等.整体齿轮压缩机复杂系统临界负荷故障现象及机理研究[J].机械工程学报,2017,53(23):20-25.
[7]朱新龙,熊禾根.基于Romax的减速箱箱体有限元模态分析[J].机械传动,2013,37(2):94-96.
[8]American Petroleum Institute.Special Purpose Gear Units for Petroleum,Chemical and Gas Industry Services,API 613-2003[S].Washington:American Petroleum Institute,2003:19-20.