第20卷第9期 2014年9月
计算机集成制造系统
Computer Integrated Manufacturing Systems
DOI:10.13196/j.cims.2014.09.015
汽轮机喷嘴环磨粒流抛光工艺参数优化
赵涛，史耀耀，葡小军，吴广
（西北工业大学现代设计与集成制造教育部重点实验室，陕西
710072）
西安
Vol.20 No,9 Sep.2014
摘要：为解决大型汽轮机喷嘴环磨粒流抛光的工艺技术问题，研究了喷嘴环磨粒流抛光工艺，分析了抛光工艺因素对表面质量的影响。根据喷嘴环结构的特点，结合抛光压力损失规律，设计了喷嘴环磨粒流抛光专用夹具；利用ANSYS有限元软件对叶片进行压力载荷静态分析，确定了合理的磨粒流抛光压强范围；采用信噪比实验设计法对工艺参数进行分析，得出工艺参数对表面粗糙度的影响关系及最优抛光工艺参数。通过实验验证可知，喷嘴环表面质量得到显著提升，可满足喷嘴环抛光表面粗糙度小于0.4um以及允许变形量小于0.1mm的图纸要求。
关键词：磨料流抛光；喷嘴环；表面质量；工艺因索；汽轮机
中图分类号：TH162+.1
文献标识码：A
Process parameters optimization of abrasive flow polishing in turbine static blade ring
ZHAOTao,SHIYao-yao,LIN Xiao-jun,WU Guang
(The key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education,
Northwestern Polytechnical University,Xi'an 710072, China)
Abstract: To solve the process technology problem of turbine static blade ring's abrasive flow polishing, the polishing process and the influence of polishing factors on surface quality were analyzed. According to the features of static blade ring, a special fixture for static blade ring abrasive flow polishing was designed by combining with the loss law aaanaaeondsskeessd software, and a reasonable range of abrasive flow polishing pressure was determined. By using signal-to-noise exper imental design method to analyze process parameters, the influence of process parameters to the surface roughness and the optimal polishing process parameters were obtained. The experimental results showed that the surface quali-ty of static blade ring was significantly improved, and abrasive flow polishing could satisfy the drawing requirements o e ssa e ssaao ens o e ssa se i ae aes aas ssaes o in deformation.
Key words:abrasive flow polishing; static blade ring; surface quality; process parameter; turbine
1
问题的提出
汽轮机喷嘴环是汽轮机核心部件之一，其质量
的优劣直接影响燃气轮机压气机的压缩比，进而影响燃烧质量和发电效率，因此喷嘴环质量的优劣是影响能源利用率的一个关键因素。为保证汽轮机能源利用率，要求喷嘴环具有较高的加工质量，而表
面粗糙度和变形量作为表征喷嘴环加工质量的主要参数，降低其表面粗糙度、减小变形量已经成为喷嘴环加工领域近年研究的重点。
喷嘴环尺寸较大，直径约为2000mm，叶片扭曲大，叶片间通道狭窄，开散性差（如图1），目前国内主要采用球头铣刀进行铣削加工或电火花加工。球头铣刀铣削加工后喷嘴环叶片型面波峰波谷明
收稿日期：2013-06-16;修订日期：2013-10-23，Received 16 June 2013;accepted 23Oct,2013
基金项目：西北工业大学创新基金资助项目（12014)；西北工业大学研究生种子基金资助项目（Z2013024)，Foundation items；Projectsupported
by the Innovation Fund of Northwestern Polytechnical University, China(No. 12014), and the Graduate Seed Fund of Northwestern Polytechnical University, China(No. Z2013024),
万方数据