摘要
压气机叶轮轻量化设计能提升其工作效率和服役寿命,而叶轮因不能改变其外形结构而不适用于拓扑优化的方式。为此,选择去除内部材料填充点阵结构成为轻量化设计的理想选择。本研究以压气机叶轮为研究对象,轻量化设计和成形工艺为目标,采用激光选区熔化技术,以Ti-6Al-4V粉末为材料,研究体心立方(BCC)和Gyroid两种点阵结构填充压气机叶轮的成形工艺。结果表明,设置叶轮外壳工艺参数:激光功率190 W,扫描速度1250 mm/s,扫描策略中对轮廓进行扫描;设置点阵结构参数:激光功率210 W,扫描速度1200 mm/s,不进行轮廓扫描,可以实现点阵叶轮完整成形。点阵结构的填充可以实现约20%的减重,点阵叶轮在成形过程中的变形量为0.12~0.13 mm,比实体叶轮降低了0.23 mm,因而点阵结构的设计能够改善成形过程中的变形。本研究通过完整的工艺流程实现了叶轮轻量化设计和制造。
The lightweight design of compressor impeller can improve its working efficiency and service life,but the impeller cannot change its shape structure and is not suitable for topology optimization.Therefore,the choice of removing the internal material and filling the lattice structure becomes the ideal choice for lightweight design.Aiming at lightweight design and forming process of compressor impeller,this study adopted selectivelaser melting technology and Ti-6Al-4V powder as materials to study the forming process of compressor impeller filled by Body-Centered Cube(BCC)and Gyroid lattice structures.The results showed that,the process parameters of the impeller shell are set as follows:laser power 190 W,scanning speed 1250 mm/s;the profile is scanned in the scanning strategy;and the lattice structure parameters are set as follows:laser power 210 W,scanning speed 1200 mm/s;the complete formation of the lattice impeller can be realized without profile scanning.The filling of the lattice structure can achieve about 20%weight reduction,and the deformation of the lattice impeller during the forming process is 0.12~0.13 mm,which is 0.23 mm lower than that of the solid impeller,so the design of the lattice structure can reduce the residual deformation during the forming process.This study realizes the lightweight design and manufacture of impeller through the complete process flow.
作者
魏取龙
姜丽红
刘征
张文玮
赵明杰
王冠刚
郭正华
余强强
WEI Qulong;JIANG Lihong;LIU Zheng;ZHANG Wenwei;ZHAO Mingjie;WANG Guangang;GUO Zhenghua;YU Qiangqiang(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China;AECC Honglin Aviation Power Control Technology Co.,Ltd.,Guiyang 550009,China)
出处
《推进技术》
北大核心
2025年第5期299-310,共12页
Journal of Propulsion Technology
基金
国家自然科学基金(52465045,52305373)。
