液力元件叶轮流道混合材质填充成型方法  

Study on a fill-form mixing material molding method for flow passage of turbomachinery

作　　者：刘博深[1] 魏巍[1,2] 闫清东[1,2] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]车辆传动国家重点实验室(北京理工大学),北京100081

出　　处：《哈尔滨工业大学学报》2015年第7期52-56,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金青年科学基金(51475041);国家部委基础产品创新计划(VTDP-2104);国家级预研项目(40402050202)

摘　　要：为解决叶轮机械空间流道的非破坏性非接触测绘问题,提出一种采用高硬度硅胶和超轻纸黏土两种不同材质对流道特征进行提取的填充成型新方法,高硬度硅胶保证拓取叶型的准确性,超轻纸黏土作为硅胶的支撑.与采用单一硅胶填充流道成型方法相比,新方法克服了叶片大扭曲角度下由于硅胶拔模受力过大,导致其难以准确回弹到原始填充位置的弊端.采用最近点迭代算法拼合某叶片测绘点云数据,并与已有叶片样件模型进行对比,结果表明:平均偏差由单一硅胶填充的300.7μm减少到混合材质填充的28.5μm,实现了较高精度的空间扭曲流道特征提取,为设计制造结果偏差检验提供了一种有效的逆向工程方法.A fill-form mixing material molding method for flow passage of turbomachinery such as hydrodynamic torque converter in the process of non-contact measurement was proposed,and the passage structure was extracted by two different materials of silicone rubber and ultra-lightweight paper clay,where silicone rubber got accurate shape of passage and paper clay supported the silicone rubber. Compared with traditional molding method with sole silicone rubber,this method overcame the shortcoming of large modeling deviation caused by deforming of silicone rubber after it was taken from flow passage but could not rebound to original shape,and the data of mapping point cloud of passage pieced by ICP algorithm coincided well with the known blade. The average deviation decreased steeply from 300. 7 μm of the sole silicone rubber molding method to 28. 5 μm of the mixing material molding method,and more accurate extraction and reconstruction of special flow passage was accomplished which provids a more effective reverse engineering method to measure and check the deviation in design and manufacture.

关 键 词：叶轮 流道 混合材质 非接触测绘 逆向工程 

分 类 号：U463[机械工程—车辆工程] TH137[交通运输工程—载运工具运用工程]