针对东风4B型客运机车轮对拍箱轴承烧损情况进行了分析研究，指出在提速后因线路、转向架结构和特性带来的影响，提出了改进建议和措施。 According to the analysis of the burning of the caster bearings of the DF-4B Passenger Wheel, it is pointed out that the suggestions and measures for improvement are put forward after the speed is raised due to the influence of the structure and characteristics of the line and bogie.