气动执行器气动控制时间影响因子的理论分析
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摘要
针对航征品牌具体型号的气动执行器,分析了其瞬态特性。结合工程热力学理论和流体数值模拟方法,提出了气动执行器必需空气质量概念,在此基础上建立了变量为空气质量流量的气动执行器动作时间计算模型。在实际参数变化范围内,运用控制变量和正交分析方法,分析了钢管长度、管径和弯头个数对气动执行器动作时间的影响规律,并确立了各个影响因素的优先级。根据气动执行器控制气路设计的实际情况,探索了气路异形化结构对气动执行器动作时间的影响规律,在此基础上进行了实例运用,验证了分析结果的正确性。
The transient characteristics of the pneumatic actuator for the specific type of aero sign are analyzed. We use the theory of engineering thermodynamics and numerical simulation method of fluid to put forward the concept of air quality. On this basis,a calculation model of pneumatic actuator action time based on air mass flow is established. In the range of actual parameters,the influence laws of steel tube length,tube diameter and quantity of elbow on pneumatic actuator action time are analyzed,and the priority of each influencing factor is discovered with the methods of control variables and orthogonal analysis. According to the actual situation of the gas path design controlled by pneumatic actuator,the influence rule of the gas path abnormity mechanism on pneumatic actuator action time is explored. Finally,we use examples to verify the correctness of the analysis result.
The transient characteristics of the pneumatic actuator for the specific type of aero sign are analyzed. We use the theory of engineering thermodynamics and numerical simulation method of fluid to put forward the concept of air quality. On this basis,a calculation model of pneumatic actuator action time based on air mass flow is established. In the range of actual parameters,the influence laws of steel tube length,tube diameter and quantity of elbow on pneumatic actuator action time are analyzed,and the priority of each influencing factor is discovered with the methods of control variables and orthogonal analysis. According to the actual situation of the gas path design controlled by pneumatic actuator,the influence rule of the gas path abnormity mechanism on pneumatic actuator action time is explored. Finally,we use examples to verify the correctness of the analysis result.
引文
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[3]SMC(中国)有限公司.现代实用气动技术[M].第3版.北京:机械工业出版社,2008:11-69,129-170.SMC(China)Co.,Ltd.Modern Practical Pneumatic Technology[M].3rd ed.Beijing:China Machine Press,2008:11-69,129-170.
[4]吉恒松,王谦,韩新月,等.热力学第一定律在充气过程求解中的应用[J].广州化工,2013,41(22):165-167.JI Hengsong,WANG Qian,HAN Xinyue,et al.Application of the First Law of Thermodynamics in Solving Inflatable Process[J].Guangzhou Chemical Industry,2013,41(22):165-167.
[5]邵帅,邓清华,时和双,等.不同容积流量下汽轮机低压缸末三级定常流动数值研究[J].西安交通大学学报,2013,47(1):15-20.SHAO Shuai,DENG Qinghua,SHI Heshuang,et al.Numerical Investigation on Flow Characteristics in Steam Turbine Low Pressure Cylinder and LPEH Under Different Volume Flow Rate Conditions[J].Journal of Xi'an Jiaotong University,2013,47(1):15-20.
[6]李明高,李明.ANSYS 13.0流场分析技术及应用实例[M].北京:机械工业出版社,2012.LI Minggao,LI Ming.Flow Field Analysis Technology and Application Examples in ANSYS 13.0[M].Beijing:China Machine Press,2012.
[7]王乐勤,林思达,田艳丽,等.基于CFD的大流量喷嘴喷射性能研究[J].流体机械,2008,36(11):17-21.WANG Leqin,LIN Sida,TIAN Yanli,et al.Study on Great Flow Nozzle Performance with CFD Method[J].Fluid Machinery,2008,36(11):17-21.
[8]李勇,王涵北.不同气体模型对数值模拟结果影响分析[J].汽轮机技术,2016,58(2):81-83.LI Yong,WANG Hanbei.The Analysis of Influence of Different Gas Models on Numerical Simulation[J].Turbine Technology,2016,58(2):81-83.
[9]杨雪龙,龙新平,肖龙洲,等.不同湍流模型对射流泵内部流场模拟的影响[J].排灌机械工程学报,2013,31(2):99-102.YANG Xuelong,LONG Xinping,XIAO Longzhou,et al.Influence of Different Turbulence Models on Simulation of Internal Flow Field of Jet Pump[J].Journal of Drainage and Irrigation Machinery Engineering,2013,31(2):99-102.
[10]王烨,王良壁.一种用于分析封闭腔内湍流自然对流换热的k-ε新模型[J].应用力学学报,2014,31(5):814-818.WANG Ye,WANG Liangbi.A New k-εModel for the Analysis of Turbulent Natural Convection Heat Transfer in a Closed Chamber[J].Chinese Journal of Applied Mechanics,2014,31(5):814-818.
[11]韩长伟,殷文齐,宋清玉.正交分析法在150 MN水压机活动横梁设计中的应用[J].一重技术,2017,(1):1-6.HAN Changwei,YIN Wenqi,SONG Qingyu.Application of Orthogonal Method in Design of 150 MN Hydraulic Press Slides[J].CFHI Technology,2017,(1):1-6.