基于模态振型分析的大型汽轮机低压转子高速动平衡方法

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (14) : 87-92.

论文

基于模态振型分析的大型汽轮机低压转子高速动平衡方法

宾光富1,2，何立东1，高金吉1，李立波3

作者信息 +

The High-speed Dynamic Balancing Method for Large Steam Turbine Low Pressor Rotor Basedon Modal Shape Analysis

Bin Guangfu1, 2, He Lidong1, Gao Jinji1, Li Libo3

Author information +

文章历史 +

摘要

针对目前传统影响系数法难以平衡某些大型汽轮机低压转子的难题，提出一种基于模态振型分析的大型柔性转子高
速动平衡方法。在分析汽轮机转子系统结构的基础上，综合考虑了动平衡机摆架轴承座的动力特性，采用基于有限元的转子
轴承动力学分析商业软件DyRoBeS 建立了转子-轴承-摆架系统模型，分析转子系统临界转速和振型，从而根据转子的模态
振型，结合柔性转子影响系数平衡法要点，设计合理的平衡工艺，有针对性的选择平衡校正面和平衡转速点，采取逐阶次平
衡的方法，实现这类大型特殊柔性转子的动平衡。最后以哈汽产的66 万千瓦大型汽轮机低压转子高速动平衡试验为例，应
用结果表明采用该方法能有效平衡大型柔性转子，且减少了起机次数，节省了平衡费用。

Abstract

Using the conventional influence coefficient method in the high-speed dynamic balancing machine
is usually difficult to balance some large flexible rotors, a new method for large steam turbine LP rotor
balancing based on mode shape analysis was developed in this study. Analyzing of the steam turbine rotor
system structure with the dynamic characteristics of dynamic balancing machine, the rotor-bearing-pedestal
system model was established by using DyRoBeS software to get the critical speed and model shape of rotor
system. Then, a reasonable balance process including balancing planes and speed points was designed based
on model shape combined with influence coefficient method of flexible rotor. The balancing method by order
time was adopt to meet dynamic balancing requirements of this kind of large special rotor. Finally, a large
660MW steam turbine LP-rotor produced by Harbin Turbine Company Limited was taken as an example. The
application result shows that the proposed method can balance large flexible rotor effectively, reduce balancing
number, and save balancing cost.

导出引用

宾光富;何立东;高金吉;李立波. 基于模态振型分析的大型汽轮机低压转子高速动平衡方法[J]. 振动与冲击, 2013, 32(14): 87-92

Bin Guangfu;;He Lidong;Gao Jinji;Li Libo. The High-speed Dynamic Balancing Method for Large Steam Turbine Low Pressor Rotor Basedon Modal Shape Analysis[J]. Journal of Vibration and Shock, 2013, 32(14): 87-92