胶条夹装式车窗密封结构参数化设计研究  

Study on the Parametric Design of Rubber Strip Clamped Sealing Structure of Car Window

作　　者：贾亚丽 颜海蛟 刘光键 王喆 JIA Yali;YAN Haijiao;LIU Guangjian;WANG Zhe(CRRC Qingdao Sifang Co.,Ltd.,Qingdao 266111,China;Qingdao Klein Railway Equipment Co.,Ltd.,Qingdao 266117,China)

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛266111 [2]青岛科林铁路设备有限公司,山东青岛266117

出　　处：《智慧轨道交通》2023年第6期1-4,共4页SMART RAIL TRANSIT

摘　　要：车窗与基材的安装方式主要有粘接式、螺栓紧固式、胶条夹装式等[1]。胶条夹装式结构通过窗框与车体之间的胶条夹紧来实现夹紧及密封,其特点是结构简单、更换方便,但受胶条老化行为的影响,胶条的硬度、几何形状等会随时间发生变化[2],与基材之间的接触应力也随之发生变化,故在设计过程中难以准确预测胶条全寿命周期内(最大使用寿命15年)的密封性能。针对胶条夹装式车窗结构,将胶条接触应力作为密封性能的设计依据[3],首先通过试验及仿真得到实现密封的临界接触应力[4],再考虑胶条全寿命周期内导致接触应力变化的主要因素,进而计算得到在寿命周期内接触应力的衰减量,最终确保残余应力大于临界接触应力,形成了满足在全寿命周期内密封可靠性的胶条参数化设计方法。The car window and the base material are assembled mainly by means of adhesive bonding,bolt fixing,rubber strip clamping,etc.[1]The rubber strip clamped structure realizes clamping and sealing with the rubber strip between the window frame and the car body.It is characterized by simple structure and easy replacement.However,under the effect of rubber ageing,the hardness and the geometric shape of the rubber strip will change with time[2],and the contact stress between the rubber strip and the base material will change accordingly,therefore,it’s difficult to exactly forecast the sealing performance of the rubber strip within its life cycle(Maximum service life=15 years)in the process of design.For the rubber strip clamped car window structure,the contact stress of rubber strip is taken for the design basis of the sealing performance[3].Firstly,the critical contact stress realizing the sealing function is obtained by test and simulation[4];secondly,the main factors causing the change of contact stress of rubber strip within its life cycle are taken into account;then the attenuation of the contact stress within the life cycle is calculated to ensure that the residual stress is greater than the critical contact stress,thus forming the parametric design method that can guarantee the sealing reliability of the rubber strip within its life cycle.

关 键 词：车窗 夹装式车窗 夹紧密封 橡胶老化 全寿命周期密封性能 参数化设计 

分 类 号：U270.386[机械工程—车辆工程]