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.
李林伟, 王磊, 朱罗平, 施国庆. 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 Linwei, Wang Lei, Zhu Luoping, Shi Guoqing. Application of least square fitting method in installation of large hydro generating sets. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(1): 45-50.
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