挡肩式车钩自由摆角对重载机车制动安全性能的影响
何永强1,3，陈章1,3，周坤*,2，王开云2，吕凯凯2，周义昌2
（1.大功率交流传动电力机车系统集成国家重点实验室，湖南 株洲 412001；2.西南交通大学 牵引动力国家重点实验室，四川 成都 610031；3.中车株洲电力机车有限公司，湖南 株洲 412001）
摘要：对于采用挡肩式车钩的机车而言，较大的车钩自由摆角将产生过大的横向分力，威胁机车的行车安全性。本文对挡肩式车钩的稳钩机理进行了理论分析，建立了重载机车动力学模型和挡肩式102车钩的动力学模型，计算分析了在车钩自由摆角为6°、7°、8°时的车钩稳定性与机车安全性，并研究了二系悬挂横向刚度对车钩稳定性的影响。研究结果表明，在纵向压钩力作用下，车钩自由摆角为6°、7°时重载机车可满足直线运行安全要求；当车钩自由摆角为8°、纵向压钩力为1200 kN时，由于车钩挡肩力过大，车钩出现失稳现象；适当增大机车二系悬挂横向刚度，可提高车钩稳定性与机车行车安全性。
关键词：重载机车；挡肩式车钩；行车安全性；车钩自由摆角；二系悬挂横向刚度
中图分类号：U292.92+1 文献标志码：A doi：10.3969/j.issn.1006-0316.2020.12.004
文章编号：1006－0316 (2020) 12－0022－06
Influence of Free Angle of Coupler with Restoring Bump Stop on the Braking Safety of Heavy Haul Locomotive
HE Yongqiang1，CHEN Zhang1，ZHOU Kun2，WANG Kaiyun2，LV Kaikai2，ZHOU Yichang2
( 1.State Key Laboratory of Heavy Duty AC Drive Electric Locomotive Systems Integration, Zhuzhou 412001, China; 2.State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China; 3.CRRC Zhuzhou Locomotive Co., Ltd., Zhuzhou 412001, China )
Abstract：For locomotive using the coupler with restoring bump stop, larger coupler free angle will cause excessive lateral force, which affects the running stability of locomotive. The stabilizing mechanism of coupler was analyzed in this paper. A dynamic simulation model of heavy haul locomotive as well as 102 coupler with restoring bump stop was built to study the coupler stability and locomotive running safety with the coupler free angle equaling 6, 7 and 8 degrees respectively. The simulation results show that the locomotive service requirement is satisfied on straight track under the longitudinal pressure when coupler free angles equal to 6 and 7 degrees. When the coupler free angle is 8 degrees and the longitudinal pressure is 1200 kN, the coupler instability occurs, which is caused by the overlarge coupler shoulder force. The coupler stability and locomotive running safty would be improved by increasing the lateral stiffness of secondary suspension appropriately.
Key words：heavy haul locomotive；coupler with restoring bump stop；running safety；coupler free angle；lateral stiffness of secondary suspension
———————————————
收稿日期：2019－11－18
基金项目：国家杰出青年科学基金（51825504）；大功率交流传动电力机车系统集成国家重点实验室开放课题（2017ZJKF07）
作者简介：何永强（1979－），男，湖南新化人，高级工程师，主要研究方向为机车服役性技术。*通讯作者：周坤（1995－），男，山东济宁人，硕士研究生，主要研究方向为重载列车系统动力学，E-mail：zhou17828115036@163.com。
设为首页 | 加入收藏 | 免责条款
《机械》杂志版权所有 Copyright©2008-2012 Jixiezazhi.com All Rights Reserved
电话：028-85925070 传真：028-85925073 E-mail：jixie@vip.163.com
地址：四川省成都锦江工业开发区墨香路48号 邮编：610063
Powered by PageAdmin CMS