汽轮机部分进汽故障综合治理方法的研究
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摘要
电站汽轮机机组在部分进汽工况下常出现瓦温高、振动大等问题,并易发生汽流激振。通过分析汽轮机部分进汽故障的机理,指出调节级配汽剩余汽流力直接作用于高压转子,且量级与转子自重相当,这将导致轴承偏离设计工况,从而引发故障。从调整调节级汽流力和轴系载荷分配两个角度出发,结合实际工程案例,总结归纳出现阶段主要采用的调整阀序、优化阀门特性曲线、调整轴系载荷分配三种治理方法及各自的应用要点。研究成果对工程实践具有一定的借鉴意义。
Problems such as high bearing temperature,serious vibration and steam flow excitation often occur in steam turbine unit under partial admission mode in power plant.Through analysis on the mechanism of steam turbine fault under partial admission mode,it was figured out that the residual steam force of governing stage was the main cause of the fault.The steam force acted directly on the high pressure rotor and was equal to the weight of the rotor,which would make bearings deviate from the design conditions,resulting in failures.From aspects of adjusting the steam flow force in governing stage and load distribution in the shaft system,combined with the actual project case,three adopted treatments(including the adjustment of valve sequence,optimization of the characteristic curve of valve and the adjustment of the load distribution of the shaft system)and their key points were summarized and concluded.The research results can provide certain reference for the engineering practice on this item.
Problems such as high bearing temperature,serious vibration and steam flow excitation often occur in steam turbine unit under partial admission mode in power plant.Through analysis on the mechanism of steam turbine fault under partial admission mode,it was figured out that the residual steam force of governing stage was the main cause of the fault.The steam force acted directly on the high pressure rotor and was equal to the weight of the rotor,which would make bearings deviate from the design conditions,resulting in failures.From aspects of adjusting the steam flow force in governing stage and load distribution in the shaft system,combined with the actual project case,three adopted treatments(including the adjustment of valve sequence,optimization of the characteristic curve of valve and the adjustment of the load distribution of the shaft system)and their key points were summarized and concluded.The research results can provide certain reference for the engineering practice on this item.
引文
[1]姜广政,傅行军.汽流激振机理分析及某330MW汽轮机故障处理[J].江苏电机工程,2014,33(2):15-21.
[2]柴保桐,傅行军,郭嘉.汽流激振机理探讨及某660 MW汽轮机故障分析及对策[J].江苏电机工程,2015,34(1):73-74.
[3]纪海东,于达仁.汽轮机配汽剩余气流力对轴系影响的研究[J].黑龙江电力,2003,25(5):355-358.
[4]张秀坤,蒋明东,苏盛波,等.国产600MW汽轮机配汽方式优化改造[J].节能技术,2005,23(1):87-90.
[5]李刚,胥建群,李玲,等.大型汽轮机组汽流激振及配汽优化研究[J].江苏电机工程,2010,29(5):11-15.
[6]谭锐,刘晓燕,陈显辉,等.超临界600MW汽轮机运行优化研究[J].热力透平,2013,42(1):15-18.
[7]段岩峰.局部进汽引发轴系故障的机理及对策[D].哈尔滨:哈尔滨工业大学,2010.
[8]刘景森,张卫斌,熊建华.600 MW超临界汽轮机顺序阀控制方式优化[J].江西电力,2009,33(5):19-24.
[9]张曦,黄卫剑,朱亚清.汽轮发电机组流量特性试验分析与研究[J].控制工程,2013,20(3):462-465.
[10]马士东.600MW汽轮机运行方式切换中产生负荷扰动的原因[J].发电设备,2010(5):347-349.
[11]鲁叶茂,曹涛.汽轮机调门最佳重叠度的确定方法[J].发电设备,2005(6):378-379.
[12]文贤馗,申自明.汽轮机控制系统改造中阀门重叠度的研究[J].热力发电,2003(5):41-43.
[13]高庆水,张万福,张楚,等.部分进汽下汽轮机不稳定振动及抑制方法[J].机械工程学报,2014,50(5):108-114.
[14]顾伟飞,吴华强.轴系调整实现汽轮机顺序阀方式投运[J].电力科学与工程,2008,24(7):46-48.
[2]柴保桐,傅行军,郭嘉.汽流激振机理探讨及某660 MW汽轮机故障分析及对策[J].江苏电机工程,2015,34(1):73-74.
[3]纪海东,于达仁.汽轮机配汽剩余气流力对轴系影响的研究[J].黑龙江电力,2003,25(5):355-358.
[4]张秀坤,蒋明东,苏盛波,等.国产600MW汽轮机配汽方式优化改造[J].节能技术,2005,23(1):87-90.
[5]李刚,胥建群,李玲,等.大型汽轮机组汽流激振及配汽优化研究[J].江苏电机工程,2010,29(5):11-15.
[6]谭锐,刘晓燕,陈显辉,等.超临界600MW汽轮机运行优化研究[J].热力透平,2013,42(1):15-18.
[7]段岩峰.局部进汽引发轴系故障的机理及对策[D].哈尔滨:哈尔滨工业大学,2010.
[8]刘景森,张卫斌,熊建华.600 MW超临界汽轮机顺序阀控制方式优化[J].江西电力,2009,33(5):19-24.
[9]张曦,黄卫剑,朱亚清.汽轮发电机组流量特性试验分析与研究[J].控制工程,2013,20(3):462-465.
[10]马士东.600MW汽轮机运行方式切换中产生负荷扰动的原因[J].发电设备,2010(5):347-349.
[11]鲁叶茂,曹涛.汽轮机调门最佳重叠度的确定方法[J].发电设备,2005(6):378-379.
[12]文贤馗,申自明.汽轮机控制系统改造中阀门重叠度的研究[J].热力发电,2003(5):41-43.
[13]高庆水,张万福,张楚,等.部分进汽下汽轮机不稳定振动及抑制方法[J].机械工程学报,2014,50(5):108-114.
[14]顾伟飞,吴华强.轴系调整实现汽轮机顺序阀方式投运[J].电力科学与工程,2008,24(7):46-48.