WJ-8型扣件螺旋道钉防松退性能改进措施  

Improvement Measures for Anti⁃loosening Performance of WJ⁃8 Type Fastener Screw Spike

作　　者：于毫勇 肖俊恒 刘长溪 王亚洲 刘炳彤 YU Haoyong;XIAO Junheng;LIU Changxi;WANG Yazhou;LIU Bingtong(Beijing Tieke Shougang Rail Technology Co.Ltd.,Beijing 102206,China;State Key Laboratory for Track System of High-speed Railway,Beijing 100081,China)

机构地区：[1]北京铁科首钢轨道技术股份有限公司,北京102206 [2]高速铁路轨道系统全国重点实验室,北京100081

出　　处：《铁道建筑》2024年第11期54-57,共4页Railway Engineering

摘　　要：WJ-8型扣件正常安装状态下,道钉受到锤击时有螺旋道钉松退甚至弹出。针对这一问题,本文对处于平衡状态和非平衡状态的道钉进行受力分析,分析螺栓副防松性能的影响因素,并提出了针对螺旋道钉防松性能的改进措施。结果表明:螺旋道钉防松退性能与螺旋升角、螺纹摩擦半径、螺纹动摩擦因数有关;降低道钉螺旋升角、增加螺纹摩擦半径、加大上部牙侧角以及采用表面更粗糙的防腐方式,均能显著提升螺旋道钉的防松退性能。In the normal installation state of WJ-8 type fasteners,when the spike is hammered,the screw spike may be loose or even popped out.In response to this issue,this article conducted force analysis on the equilibrium and nonequilibrium states of spikes,analyzed the factors affecting the anti-loosening performance of bolt pairs,and proposed improvement measures for the anti-loosening performance of screw spike.The results indicate that the anti-loosening performance of screw spike is related to the helix angle,thread friction radius,and thread dynamic friction coefficient.Reducing the helix angle of the screw spike,increasing the friction radius of the thread,increasing the upper flank angle,and adopting a rougher surface anti-corrosion method can significantly improve the anti-loosening performance of the screw spike.

关 键 词：WJ-8型扣件 螺旋道钉 试验研究 螺纹自锁 螺栓副 影响因素 改进措施 

分 类 号：U213.533[交通运输工程—道路与铁道工程]