载流滑动摩擦副温度场瞬态特性仿真研究
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摘要
弓网系统瞬态温升会影响摩擦副的材料特性、加速系统磨耗。为减小温度场引起的磨耗,对铜/浸铜碳摩擦副的瞬态温升及分布规律进行研究。利用COMSOL Multiphysics建立仿真模型,通过温升实验验证模型的有效性,并对接触面的温度场瞬态过程进行仿真计算。滑板温升伴随有周期性小峰值,运行初始阶段接触区温度最高,在接触区相对运动的前方温度梯度较大、后方有"高温拖尾"现象。运行中后期接触区温度反而稍低,在相对运动前方温度值更高。铜导线温度变化较平缓且总体温度较低,在运行方向温度梯度较小。上述结论对研究摩擦副的温度特性具有重要意义。
The transient temperature rise of pantograph and catenary system could affect material properties of the friction pair, which accelerates the wear of system. In order to reduce the wear caused by temperature, transient temperature and distribution of copper/copper-carbon friction pair are studied. A simulation model is established by using COMSOL Multiphysics software. Model effectiveness is verified with temperature experiments. The transient process of temperature field is studied by simulation. The results show that the temperature rise of carbon plate has small cyclical peaks. The highest temperature appears on the contact region in the initial stage of running. Temperature gradient is larger in front of the direction of relative movement, and "high temperature trailing" phenomenon appears in the back. Temperature on contact region is slightly lower in middle and late stage of running. And temperature in front of the direction of relative movement is higher. Temperature rise of copper wire is gentle and overall low. The temperature gradient is smaller in the direction of running. These results will provide certain references to further study on the temperature characteristics of the friction pair.
The transient temperature rise of pantograph and catenary system could affect material properties of the friction pair, which accelerates the wear of system. In order to reduce the wear caused by temperature, transient temperature and distribution of copper/copper-carbon friction pair are studied. A simulation model is established by using COMSOL Multiphysics software. Model effectiveness is verified with temperature experiments. The transient process of temperature field is studied by simulation. The results show that the temperature rise of carbon plate has small cyclical peaks. The highest temperature appears on the contact region in the initial stage of running. Temperature gradient is larger in front of the direction of relative movement, and "high temperature trailing" phenomenon appears in the back. Temperature on contact region is slightly lower in middle and late stage of running. And temperature in front of the direction of relative movement is higher. Temperature rise of copper wire is gentle and overall low. The temperature gradient is smaller in the direction of running. These results will provide certain references to further study on the temperature characteristics of the friction pair.
引文
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[15]田兴春,董霖,徐伟,等.焦耳热对搅拌摩擦焊耦合温度场的影响[J].润滑与密封,2014,39(8):68-72.Tian Xingchun,Dong Lin,Xu Wei,et al.The Effect of Joule-Heat on Coupling Temperature Field of Friction Stir Welding[J].Lubrication Engineering,2014,39(8):68-72.
[16]杨阳,何强,秦大同,等.基于COMSOL的混合动力汽车ISG电机瞬态温度场分析[J].中国公路学报,2013,26(6):176-181.Yang Yang,He Qiang,Qin Datong,et al.Analysis on Transient Temperature Field of ISG Motor in Hybrid Electric Vehicle Based on COMSOL[J].China Journal of Highway and Transport,2013,26(6):176-181.
[2]卜俊,丁涛,陈光雄.温度对受电弓滑板材料磨损的影响[J].润滑与密封,2010,35(5):22-25.Bu Jun,Ding Tao,Chen Guangxiong.Effect of Temperature on the Wear Behaviour our of a Pantograph Strip Material[J].Lubrication Engineering,2010,35(5):22-25.
[3]Adrian Plesca.Thermal analysis of sliding electrical contacts with mechanical friction in steady state conditions[J].International Journal of Thermal Sciences(S1290-0729),2014,84:125-133.
[4]Costica Nituca.Thermal analysis of electrical contacts from pantograph–catenary system for power supply of electric vehicles[J].Electric Power Systems Research(S0378-7796),2013,96:211-217.
[5]Rowe K G,Bennett A I,Krick B A,et al.In situ thermal measurements of sliding contacts[J].Tribology International(S0301-679X),2013,62:208-214.
[6]火文辉,李忠学.弓网接触界面热效应与磨损量的数值模拟[J],机械研究与应用,2015,28(3):98-104.Huo Wenhui,Li Zhongxue.Numerical Simulation of Thermal Effect and Wear Loss on Pantograph-Catenary Contact Interface[J].Mechanical Research&Application,2015,28(3):98-104.
[7]张玉燕,李海龙,王振春,等.大载流高速滑动电接触表面瞬态温度分析[J].中国科学:技术科学,2015,45(8):834-842.Zhang Yuyan,Li Hailong,Wang Zhenchun,et al.Analysis of Surface Transient Temperature on Large Current Carrying High-Speed Sliding Electrical Contact[J].Scientia Sinica:Technologica,2015,45(8):834-842.
[8]胡艳,董丙杰,黄海,等.碳滑板电滑动温升及其对滑板磨损影响的试验研究[J].摩擦学学报,2015,35(6):677-683.Hu Yan,Dong Bingjie,Huang Hai,et al.Experimental Study on the Temperature Rise of a Carbon Strip and Its Influence on the Wear Performances of the Carbon Strip[J].Tribology,2015,35(6):677-683.
[9]王英,刘志刚,母秀清,等.受电弓双滑板下的弓网电接触稳态热流分析与验证[J].铁道学报,2015,37(5):27-33.Wang Ying,Liu Zhigang,Mu Xiuqing,et al.Thermal Steady-state Analysis and Validation with Double Slide Electric Contacts in Pantograph-catenary System[J].Journal of The China Railway Society,2015,37(5):27-33.
[10]董霖,李传喜,陈光雄,等.弓网载流摩擦耦合温度场的仿真研究[J].中国铁道科学,2014,35(3):102-106.Dong Lin,Li Chuanxi,Chen Guangxiong,et al.Simulation study on Coupling Temperature Field under Pantograph-Catenary Friction with Electric Current[J].China Railway Science,2014,35(3):102-106.
[11]王万岗,吴广宁,高国强,等.弓网系统接触电阻特性[J].中南大学学报,2012,43(10):3857-3864.Wang Wangang,Wu Guangning,Gao Guoqiang,et al.Characterization of Contact Resistance Between Pantograph and Catenary System[J].Journal of Central South University,2012,43(10):3857-3864.
[12]郭凤仪,张艳立,王智勇,等.弓网电弧实验系统与辐射噪声实验研究[J].电工电能新技术,2015,34(12):49-53.Guo Fengyi,Zhang Yanli,Wang Zhiyong,et al.Design of Pantograph Arc Experiment System and Study on Radiated Noise[J].Advanced Technology of Electrical Engineering and Energy,2015,34(12):49-53.
[13]郭凤仪,王喜利,王智勇,等.弓网电弧辐射电场噪声实验研究[J].电工技术学报,2015,30(14):220-225.Guo Fengyi,Wang Xili,Wang Zhiyong,et al.Research on Radiated Electric Field Noise of Pantograph Arc[J].Transactions of China Electrotechnical Society,2015,30(14):220-225.
[14]郭凤仪,王喜利,王智勇,等.弓网离线接触电流总谐波畸变率的实验研究[J].电工技术学报,2015,30(12):261-266.Guo Fengyi,Wang Xili,Wang Zhiyong,et al.Experimental Research on Total Harmonic Distortion of Contact Current Caused by Pantograph-Catenary Off-Line[J].Transactions of China Electrotechnical Society,2015,30(12):261-266.
[15]田兴春,董霖,徐伟,等.焦耳热对搅拌摩擦焊耦合温度场的影响[J].润滑与密封,2014,39(8):68-72.Tian Xingchun,Dong Lin,Xu Wei,et al.The Effect of Joule-Heat on Coupling Temperature Field of Friction Stir Welding[J].Lubrication Engineering,2014,39(8):68-72.
[16]杨阳,何强,秦大同,等.基于COMSOL的混合动力汽车ISG电机瞬态温度场分析[J].中国公路学报,2013,26(6):176-181.Yang Yang,He Qiang,Qin Datong,et al.Analysis on Transient Temperature Field of ISG Motor in Hybrid Electric Vehicle Based on COMSOL[J].China Journal of Highway and Transport,2013,26(6):176-181.