机械密封动压槽激光加工工艺参数反演及槽深加工精度控制研究  

Study on Parameters Inversion and Groove Depth Accuracy Control in Laser Machining of Hydrodynamic Grooves of Mechanical Seal

作　　者：陈硕 刘小磊 邓强国[1] 孙雪剑 许恒杰[1] 毛文元[1] Chen Shuo;Liu Xiaolei;Deng Qiangguo;Sun Xuejian;Xu Hengjie;Mao Wenyuan(Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan,China)

机构地区：[1]昆明理工大学化学工程学院,云南昆明650500

出　　处：《中国激光》2024年第16期305-315,共11页Chinese Journal of Lasers

基　　金：国家自然科学基金(52105189);云南省科技厅基础研究专项-面上项目(202401AT070404);云南省教育厅科学研究基金(2024J0075)。

摘　　要：为了进一步提高机械密封动压槽槽深的加工精度,利用槽深计算模型,编写了动压槽激光加工工艺参数反演程序,同时还基于槽深误差和槽深相对误差的定义,构建了多次反演槽深加工误差的模型,开展了工艺参数单次反演及槽深加工精度多次反演的控制研究,并进行了实验验证。结果表明:在单次反演研究中,利用反演程序获得的16组工艺参数反演结果与实验结果均较为吻合,槽深的最大相对误差不超过17.00%;在多次反演研究中,分别以第1次反演实验槽深小于目标槽深(槽深相对误差为17.00%)和大于目标槽深(槽深相对误差为5.55%)为案例,通过不同的反演方法进行两次反演,最终将槽深相对误差均控制在5.00%以内,满足了设计控制目标要求,实现了对机械密封动压槽槽深的精确控制。Objective As an important component of rotating equipment such as pumps,compressors,and reactors,the hydrodynamic mechanical seal plays a vital role in ensuring the stable operation of the main machine.The machining accuracy of the hydrodynamic groove depth is an important factor that affects its stable operation.At present,laser machining technology has been widely used in the machining of hydrodynamic grooves,but the general groove depth machining error is still approximately 1-2μm,and a large groove depth machining error can easily cause seal instability or failure.Therefore,accurate control of the hydrodynamic groove depth is of great significance to improve the sealing performance and operating stability.However,there is still a lack of simple and effective methods and measures to accurately control the groove depth of hydrodynamic grooves,and thus further study is required.Based on the depth calculation model of hydrodynamic grooves and the groove depth machining error model of multi-inversion,this study investigated the inversion of process parameters and groove depth machining accuracy control in nanosecond laser machining of mechanical seal hydrodynamic grooves.This study is expected to provide theoretical guidance and technical support for the accurate control of groove depth in various mechanical seal hydrodynamic grooves or microgrooves in other fields.Methods A parameter inversion program is compiled based on the groove depth calculation model for laser machining of hydrodynamic grooves previously proposed by the research group.Combined with the definition of groove depth error and groove depth relative error,a multi-inversion groove depth machining error model is constructed.The model considered two conditions,namely,experimental groove depths smaller and greater than the target groove depth.The inversion program is used to study the single inversion of process parameters and the machining accuracy control of groove depth with multi-inversion.A SiC sealing ring is used as the experimental object,an

关 键 词：激光技术 机械密封 动压槽 工艺参数 反演 

分 类 号：TH42[机械工程—机械制造及自动化]