高水头混流式水轮机导水机构互换性具有巨大的经济效益。本文全面分析和论证了高精度轴向装配尺寸链的加工精度、形位误差与检测方法及加工机床精度的内在关系,并提出了在现有一般技术装备条件下如何保证导叶端面间隙的工艺路线,以及进一步提高形位误差的可行性方案。 High water head Francis turbine water diversion agency has enormous economic benefits. This paper comprehensively analyzes and demonstrates the inherent relationship between machining accuracy, shape error, detection method and machining precision of high precision axial assembly chain, and puts forward the process of how to ensure the gap of guide vane under the current general technical equipment condition Route, as well as to further improve the shape error of the feasibility of the program.