主汽温偏差引发振动波动原因的分析与试验研究
Analysis and Experimental Study on Unstable Vibration Caused by Steam Temperature Deviation
曹仲勋 1申智勇 1段旺权 2杨建刚3
作者信息
- 1. 国家能源集团科学技术研究院有限公司,江苏南京 210046
- 2. 国能长源汉川发电有限公司,湖北汉川 431600
- 3. 东南大学能源与环境学院,江苏南京 210096
- 折叠
摘要
为了解决某型1 000 MW汽轮机高压转子振动不稳定问题,试验研究了转子振动规律及其影响因素,采用有限元方法建立高压转子-轴承系统动力学模型,计算分析了主汽温偏差对振动的影响.结果表明:主汽温偏差改变转子和汽缸同心度,产生不均衡汽流力作用到转子上改变了轴承载荷,进而影响振动;该机组高压转子1号轴承磨损后轴承间隙增大、轴承刚度减小,主汽温偏差对不稳定振动影响程度增大,并导致振动响应最大部位向1号轴承侧移动;采取减小主汽温偏差、防止轴承乌金偏磨、减小轴承间隙等措施,在实际应用中取得了较好的减振效果.
Abstract
In order to solve the problem of unstable vibration of the high-pressure rotor of a certain type of 1 000 MW steam turbine,experimental research was conducted on the rotor vibration rule and its influ-encing factors.A dynamic model of the high-pressure rotor bearing system was established by the finite element method,and the influence of steam temperature deviation on vibration was calculated and ana-lyzed.The results indicate that the deviation of steam temperature changes the concentricity between the rotor and cylinder,resulting in unbalanced steam force acting on the rotor.The bearing load has been changed,leading to vibration.After the wear of No.1 bearing of the high-pressure rotor,the bearing clearance increases,the bearing stiffness decreases,and the impact of steam temperature deviation on unstable vibration increases,leading to the maximum vibration response moving towards the side of No.1 bearing.Measures such as reducing the deviation of steam temperature,preventing bearing babbitt wear and reducing bearing clearance have achieved good vibration reduction effects in practical application.
关键词
振动/汽轮机/轴承/刚度/不平衡响应Key words
vibration/steam turbine/bearing/stiffness/unbalance response引用本文复制引用
基金项目
国家能源集团科学技术研究院有限公司科技项目(WH2023Y02)
出版年
2024
NETL
NSTL
万方数据