提出一种旋转机械弯曲转轴的平衡配重补偿方法,从所测转轴弯曲分布曲线中计算得到补偿转轴弯曲影响的配重量,从而降低旋转机械振动。根据转轴弯曲变形的特点,认为轴段截面上弯曲值与角度之间的关系以及弯曲沿轴向的分布可以分别用三角函数和多项式来拟合。为了考虑弯曲截面位置对振动的影响,依据力和力矩平衡方法,把不同轴段上的力分解到两个端面上,在两个端面上保留反对称分量力并将对称分量力修正后移到转轴中部。结合某台135MW汽轮机高压转子弯轴实例进行了分析。
Abstract
The paper presents a compensation weight calculation method for bend rotor balance of rotating machinery. The compensated weight is calculated from the measured rotor bend curve to reduce vibration. Rotor bend in circular direction and along shaft axis are fitted using the triangular function and the polynomial function respectively on the base of rotor bend characteristics. Unbalance force in different shaft sections was divided to the selected two end sections using the force and the moment balance method to consider the influence of force distribution in the shaft. The symmetric force component is moved to rotor center while the ant symmetric force component is kept in the two end sections. The method was used to calculate the compensation weight for a 135MW turbine high pressure rotor successfully.
关键词
旋转机械 /
振动 /
平衡 弯曲转子
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Key words
Rotating machinery /
Vibration /
Balance /
Bend rotor
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参考文献
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脚注
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