磨粒流研抛伺服阀阀芯喷嘴的冲蚀磨损分析

发布时间：2018-03-30 07:23

本文选题：阀芯喷嘴　切入点：磨粒流研抛　出处：《光学精密工程》2017年07期

【摘要】：为了研究固液两相磨粒流对伺服阀阀芯喷嘴的研抛性能,从冲蚀磨损的角度对比分析了不同磨粒硬度下的磨粒流研抛效果。利用计算流体力学方法,求解分析了磨粒流研抛伺服阀阀芯喷嘴时流场中的冲蚀磨损特性,采用电子显微镜以及扫描电镜仪检测伺服阀阀芯喷嘴零件经磨粒流研抛前后的表面粗糙度和表面形貌。实验结果表明:采用碳化硅磨粒和白刚玉磨粒加工后的伺服阀阀芯喷嘴主干通道、交叉孔以及小孔区域的粗糙度分别由1.1μm、0.823μm、0.743μm降低为0.735μm、0.721μm、0.571μm和1μm、0.747μm、0.696μm。在本试验中碳化硅磨粒的加工效果优于白刚玉磨粒,即具有高磨粒硬度的磨粒研抛效果好。检测结果显示,磨粒流研抛技术可有效改善伺服阀阀芯喷嘴的表面质量;提高磨粒硬度可提高磨粒流的研抛效果;伺服阀阀芯喷嘴的交叉孔以及小孔区域的表面质量要高于主干通道的表面质量。
[Abstract]:In order to study the polishing performance of solid-liquid two-phase abrasive flow on valve core nozzle of servo valve, the abrasive flow polishing effect under different abrasive hardness was compared and analyzed from the angle of erosion wear. The erosion and wear characteristics in the flow field of abrasive abrasive abrasive polishing servo valve valve core nozzles are solved and analyzed. The surface roughness and surface morphology of servo valve valve core nozzle before and after abrasive polishing were examined by means of electron microscope and scanning electron microscope. The experimental results show that silicon carbide abrasive particles and white corundum abrasive particles are used after processing. Service valve core nozzle trunk passage, The roughness of cross hole and small hole region was reduced from 1. 1 渭 m ~ 0. 823 渭 m ~ 0. 743 渭 m to 0.735 渭 m ~ 0. 721 渭 m ~ 0. 571 渭 m and 1 渭 m ~ 0. 747 渭 m ~ 0. 696 渭 m respectively. The processing effect of silicon carbide abrasive particle is better than that of white corundum abrasive particle. Abrasive flow polishing technology can effectively improve the surface quality of valve core nozzles of servo valve, increase the hardness of abrasive particles can improve the abrasive flow polishing effect. The surface quality of the cross hole and orifice of the valve core nozzle is higher than that of the main channel.
【作者单位】：长春理工大学机电工程学院;
【基金】：国家自然科学基金资助项目(No.51206011) 吉林省科技发展计划资助项目(No.20160101270JC,No.20170204064GX) 吉林省教育厅项目(吉教科合字[2016]第386号)
【分类号】：TG580.23

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