轨道列车制动盘紧固件不同螺纹结构传力研究

打开文本图片集

中图分类号：U270.35 文献标志码：B doi：10.20213/j.cnki.tdcl.2025.01.013

文章编号：1002-7602（2025）01-0118-05

Abstract：High-strength bolts are key components of brake discs for high-speed rail vehicles，and their main failures are nut loosening and bolt fatigue fracture.By comparing the different engagement states of wedge thread and common thread nut with bolt，the force transmission behavior of thread structure is analyzed.Photo-elastic test technology is used to test the stress-strain distribution at the nut and bolt engagement when threads of diferent structures are engaged. The results show that compared with ordinary threaded nuts，when assembled with the same bolt，the stress of the first buckle thread ofa wedge threaded nut is obviously lower than that of ordinary threads，and the stressdistribution of allengaging threads is more uniform.At the same time，the comparative test results of bolt fatigue strength show that the fatigue life of wedge thread nut matching bolt is obviously better than that of ordinary thread under the same load condition.

Key Words：rail vehicle;thread structure;fastener; force transmission;brake disc

制动盘是高速轨道交通列车盘形基础制动装置的核心部件之一，在高速旋转和摩擦制动过程中承受的各种载荷均通过制动盘紧固件进行传递。（剩余4875字）