电气化铁路接触网绝缘子积污特性模拟仿真  

Simulation on Contamination Depositing Characteristics of Electrified Railway Catenary Insulator

作　　者：王国志[1] 陈情 WANG Guozhi;CHEN Qing(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学机械工程学院,成都610031

出　　处：《电瓷避雷器》2020年第6期228-234,240,共8页Insulators and Surge Arresters

摘　　要：通过分析颗粒在绝缘子表面沉积的力学机理,给出了颗粒在绝缘子表面的沉积判据。采用COMSOL多物理场仿真软件,对铁路接触网QBN-25绝缘子的自然积污特性进行仿真,分析风速大小、颗粒粒径对绝缘子积污的影响。结果表明:接触网绝缘子表面颗粒的积污量与风速呈正相关关系,同样积污量与颗粒粒径的大小近似呈正相关关系;在小风速时,绝缘子两端伞裙的积污量较高,低压端绝缘子比高压端绝缘子积污更加严重,处于中间位置伞裙的积污量较小,绝缘子各个伞裙的积污分布总体上呈"U"型分布,而且当风速增大后,高压端绝缘子积污量会比低压端绝缘子积污严重;灰尘颗粒粒径增加后,这种"U"型分布会变得不再显著,绝缘子各个伞裙的积污量变得平均起来。Theauthor analyses the mechanics mechanism of the particle deposition on the surface of the insulator,the sedimentary criterionis given. Using COMSOL multi-physical field simulation software,the natural pollution accumulation characteristics of QBN-25 insulator in railway catenary are simulated,and the influence of wind speed and particle size on insulator fouling is analyzed. The results show that catenary insulator surface particle deposition quantity relation with wind speed were positively correlated,the same quantity and the size of the particle were positively related;In small wind speed,the insulator deposition quantity on both ends of the insulator shed is higher,the deposition quantity of the low voltage side is more serious than high side,quantity is smaller in the middle position,the quantity of each insulator shed in general is "U"type distribution,when the wind speed increases,the high voltage side deposits seriously than the low side;With the dust particle size increases,the "U"type distribution will become no longer significant,quantity of the each shed becomes average.

关 键 词：接触网 绝缘子 灰尘颗粒 自然积污 

分 类 号：U225.43[交通运输工程—道路与铁道工程] TM216[一般工业技术—材料科学与工程]