排灌机械工程学报
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排灌机械工程学报  2014, Vol. 32 Issue (1): 45-50    DOI: 10.3969/j.issn.1674-8530.13.0041
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最小二乘拟合法在大型水电机组安装中的应用
李林伟, 王磊, 朱罗平, 施国庆
华电电力科学研究院水电技术研究所, 浙江 杭州 310030
Application of least square fitting method in installation of large hydro generating sets
Li Linwei, Wang Lei, Zhu Luoping, Shi Guoqing
Institute for Hydroelectric Technology, Huadian Electric Power Reasearch Institute, Hangzhou, Zhejiang 310030, China
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摘要 为了分析大型水轮发电机组安装、加工的质量,以及设备吊装、混凝土施工过程中设备的变形情况,提出了基于VC编程的最小二乘拟合圆与拟合空间平面算法,并在大型水轮发电机组安装中进行了实际应用.运用该方法计算出某大型水轮发电机组座环上、下镗口加工后的圆度分别为1.53,1.74 mm,拟合圆半径分别为6 340.24,6 335.48 mm,同心度为0.14 mm,各项指标都达到优良标准.运用该方法,对另一座水电站在蜗壳混凝土浇筑灌浆后,由水准仪测量得到的座环上环板各测点高程,计算出座环上环板的平面度为6.44 mm,已超出了质量标准.在大型定子机座整体吊装时,通过测量定子机座吊起后支腿测点的高程,然后以空间平面拟合方法计算出机架各支腿的不平度,可以快速分析定子机座整体吊装时的变形情况.
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李林伟
王磊
朱罗平
施国庆
关键词水轮发电机组   座环   定子机座   圆度   最小二乘法   平面度     
Abstract: In order to analyze the quality of installation and machining, and the deformation of equipment in hoisting and concrete construction for large hydro generating sets, an algorithm of least squares for fitting a circle and plane based on VC programming was presented and applied into installation of large hydro generating sets. In the light of this method, the roundness of bored holes on top and bottom annular plates of the stay ring was 1.53 mm and 1.74 mm, the fitted radius was 6 340.24 mm and 6 335.48 mm, the concentricity was 0.14 mm, all the parameters have arrived at the standard of excellence. In another hydro power station, the altitude of each point on the top annular plate of stay ring was measured by a level after volute concreting and grouting was completed, then the flatness of the plate was fitted by means of this method, showing a 6.44 mm flatness which was better than that in the quality standard for installation. During integral hoisting of a large stator frame, the altitude of each point on the legs of the frame was measured, and then the flatness of every leg was calculated by fitting plane with that method, eventually, the deformation of the frame could be analyzed quickly.
Key wordshydroelectric generating set   stay ring   stator frame   circularity   least squares method   flatness   
收稿日期: 2013-01-18;
通讯作者: 李林伟(1984—),男,浙江衢州人,工程师,硕士(llw1251@126.com),主要从事水电站机组安装、水电站机组性能考核、水电站经济运行研究.   
作者简介: 李林伟(1984—),男,浙江衢州人,工程师,硕士(llw1251@126.com),主要从事水电站机组安装、水电站机组性能考核、水电站经济运行研究.
引用本文:   
李林伟,王磊,朱罗平等. 最小二乘拟合法在大型水电机组安装中的应用[J]. 排灌机械工程学报, 2014, 32(1): 45-50.
LI Lin-Wei,WANG Lei,ZHU Luo-Ping et al. Application of least square fitting method in installation of large hydro generating sets[J]. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(1): 45-50.
 
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