论文部分内容阅读
针对我国电气化铁路高速、重载下弓网高温引起的弓网热侵蚀问题,提出一种针对弓网滑动电接触在双滑板电接触点下的稳态热模型,说明弓网滑板双点取流和单点取流的热流分布差别。首先从双滑板接触点角度分析弓网受流,依据稳态热平衡方程构建了电接触在双滑板电接触点下的稳态热模型,并给出了边界条件;然后通过非接触式红外热像检测进行了不同条件参数下的稳态双滑板接触点受流测温实验与模型对比;最后验证了该弓网电接触在双滑板电接触点下的稳态热模型可以计算不同弓网接触压力、不同车速、双滑板不同受流、不同距离等情况下的稳态温度分布,并证实了模型的可行性和有效性。
Aiming at the problem of thermal corrosion of bow web caused by the high temperature of bow web at high speed and heavy load of electrified railway in China, a steady-state thermal model is proposed for the sliding contact of bow web under the contact points of double skateboard. And single-point flow of heat flow distribution differences. Firstly, the bow flow is analyzed from the point of contact of the double-slider, then the steady-state thermal model of the electrical contact under the double-slider electrical contact is established based on the steady-state heat balance equation, and the boundary conditions are given. Then, by the non-contact infrared thermography The steady-state thermal model of the double-slider contact point under different conditions was tested and compared with the model. Finally, it was verified that the steady-state thermal model of the electrical contact of the bow mesh under the double-slider electrical contact point could calculate the contact pressure , Different vehicle speeds, double skateboards with different current, different distances and other conditions of steady-state temperature distribution, and confirmed the feasibility and effectiveness of the model.