华鹏,朱海清,施晓敏,张茂力,邓俊秀.安全阀阀座与阀瓣研磨修复工艺实验研究[J].表面技术,2017,46(8):280-285
安全阀阀座与阀瓣研磨修复工艺实验研究
Grind and Repair Process Experiment of Safety Valve Seat and Valve Disc
投稿时间:2017-02-20  修订日期:2017-08-20
DOI:10.16490/j.cnki.issn.1001-3660.2017.08.045
中文关键词:  安全阀  磨削机理  正交实验  磨削量  表面粗糙度
英文关键词:safety valve  grinding mechanism  orthogonal experiment  grinding amount  surface roughness
基金项目:
作者单位
华鹏 江南大学 机械工程学院,江苏 无锡 214122 
朱海清 江南大学 机械工程学院,江苏 无锡 214122 
施晓敏 江南大学 机械工程学院,江苏 无锡 214122 
张茂力 江南大学 机械工程学院,江苏 无锡 214122 
邓俊秀 江南大学 机械工程学院,江苏 无锡 214122 
AuthorInstitution
HUA Peng School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China 
ZHU Hai-qing School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China 
SHI Xiao-min School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China 
ZHANG MAO-Li School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China 
DENG Jun-xiu School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China 
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中文摘要:
      目的 为满足安全阀阀座与阀瓣配合面密封要求,提高安全阀密封面磨削修复质量和效率,阀座和阀瓣表面粗糙度Ra≤0.1 μm。方法 在正交实验的基础上,采用Al2O3砂纸、白刚玉研磨膏为磨削介质,研究了磨粒细度、磨削时间、磨削转速、磨削压力对密封表面粗糙度和磨削量的影响,使用粗糙度测量仪、千分尺、电子显微镜对阀座和阀瓣的表面粗糙度、磨削量、表面形貌进行测量分析。以磨削量和表面粗糙度为评价指标,得到最佳工艺参数,并通过多组重复性实验验证实验结果的可靠性。结果 在最佳磨削工艺参数下,砂纸研磨阀座和阀瓣的磨削量为0.023 mm,表面粗糙度为0.135 μm,研磨膏抛光阀座和阀瓣的表面粗糙度为0.073 μm。结论 砂纸研磨最佳工艺参数:研磨压力80 N,研磨转速80 r/min,研磨时间10 min,砂纸细度1000目。研磨膏抛光最佳工艺参数:抛光压力30 N,抛光转速100 r/min,抛光时间10 min。采用砂纸、研磨膏磨削修复工艺,可以提高磨削量,降低表面粗糙度,提高了安全阀磨削后的密封性能。
英文摘要:
      The work aims to meet sealing requirements of safety valve seat and valve disc fitting surface, improve grind repair quality and efficiency of safety valve sealing surface, and make valve seat and disc surface roughness Ra≤0.1 μm. With Al2O3 abrasive paper and white corundum abrasive paste as grinding medium, effects of grain fineness, grinding time, grinding speed and grinding pressure on sealing surface roughness and grinding amount were studied based on orthogonal experiment. Surface roughness, grinding amount and surface morphology of the valve seat and valve disc were measured and analyzed using roughness tester, micrometer and electron microscope. Optimum technological parameters were obtained with grinding amount and surface roughness as evaluation indicators, and reliability of the experiment was verified by multiple repetitive experiments. Provided with optimum grinding technological parameters, the grinding amount of valve seat and valve disc grinded by sandpaper was 0.023 mm, and surface roughness 0.135 μm, surface roughness of valve seat and valve disc polished with abrasive paste was 0.073 μm. Optimum technological parameters for sandpaper grinding are: grinding pressure 80 N, grinding speed 80 r/min, grinding time 10 min, sandpaper fineness 1000 mesh; for abrasive paste polishing: polishing pressure 30 N, polishing speed 100 r/min and polishing time 10 min. Sandpaper and grinding paste grind repair process can improve grinding amount, reduce surface roughness, and improve sealing performance of grinded safety valve.
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