摘要
高速列车齿轮在最高转速/转矩下会产生高温,温度过高会使齿轮系统发生热变形,容易导致齿轮轮齿折断、传动失效等问题。首先研究不同摩擦系数对齿轮表面温度的影响,采用ABAQUS/Explicit方法对最高转速/转矩及不同摩擦系数下的热应力和名义应力进行对比。结果表明:摩擦系数越大,高速列车齿轮系统热应力和名义应力之差越大;当摩擦系数为0.1时,热应力和名义应力峰值较小;在0.02 s内高速列车齿轮系统热应力和名义应力最高点均处于齿根处。其次采用热结构耦合研究不同材料比热容对高速列车齿轮系统温度影响,结果表明:高速列车齿轮在比热容为700 J/(kg·℃)时较合适。本研究为高速齿轮系统的结构设计和工程应用提供了一种新思路。
High-speed train gears will generate high temperature at the highest speed/torque;if the temperature is too high,the gear system will be thermally deformed,which will easily lead to problems such as gear teeth breakage and transmission failure.The friction coefficient is an important factor affecting the surface temperature of the gear.The ABAQUS/Explicit method is used to compare the thermal stress and the nominal stress at the highest speed/torque with the most different friction coefficients.The results show that the larger the friction coefficient,the larger the difference between the thermal stress and the nominal stress of the high-speed train gear system;when the friction coefficient is 0.1,the thermal stress and nominal stress peak are smaller;within 0.02 s,the highest point of thermal stress and nominal stress of the high-speed train gear system is at the root of the tooth.The thermal-structure coupling is used to study the effect of the specific heat capacity of different materials on the temperature of the high-speed train gear system.The results show that the specific heat value of the high-speed train gear is 700 J/kg·℃.This research provides a new idea for the structural design and engineering application of high-speed gear systems.
作者
侯琬儿
李晓峰
王得羽
周世新
HOU Wan-er;LI Xiao-feng;WANG De-yu;ZHOU Shi-xin(Graduate School of Dalian Jiaotong University,Dalian Liaoning 116000,China)
出处
《机械研究与应用》
2023年第1期131-135,共5页
Mechanical Research & Application
关键词
高速列车齿轮
摩擦系数
热结构耦合
显示动力学
热应力
名义应力
high-speed train gears
friction coefficient
thermal structural coupling
display kinetics
thermal stress
nominal stress
