难加工航空发动机叶轮叶片抛光技术及其发展现状

摘要

The impeller and blade is the key part of the aero-engine.The surface micro-morphology and surface roughness of the impeller and blades have direct influence on the air compressing efficiency and heat conductivity of aero-engine and the thrust weight ratio of plane.Some polishing techniques as final finishing process of the impeller and blades are reviewed and their recent developments are shown in the paper.Further more,the method and the characteristics of abrasive belt grinding,abrasive flowing machine polishing and non-tradition polishing and results in the polishing machining of impeller are analyzed.%叶轮叶片是航空发动机的核心零件,叶轮表面粗糙度及其微观形貌对发动机的压气效率、热导率和推重比等性能指标具有重要的影响.综述了国内外关于航空发动机叶轮叶片和整体叶轮表面抛光技术的研究和发展概况,对砂带抛光、流体磨料抛光和整体叶轮的特种抛光方法的特点及其在叶轮抛光加工中的效果进行了系统的分析.