Failure analysis of the conical press-fit connections in a locomotive drive system

被引：3
|
作者：
Shen, Longjiang [1 ,2 ,3 ]
Tang, Yingwu [3 ]
Jiang, Bingyan [1 ]
机构：
[1] Cent S Univ, Coll Mech & Elect Engn, State Key Lab High Performance Complex Mfg, Changsha 410083, Hunan, Peoples R China
[2] CSR Zhuzhou Elect Locomot Co Ltd, Zhuzhou 412001, Peoples R China
[3] CSR Zhuzhou Elect Co Ltd, Zhuzhou 412001, Peoples R China
来源：
ENGINEERING FAILURE ANALYSIS | 2014年 / 44卷
关键词：
Failure analysis; Conical press-fit connections; Fretting wear/fatigue; Corrosion; Oil groove;
D O I：
10.1016/j.engfailanal.2014.04.019
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The nose-suspension drive designs with overhanging pinion are commonly applied in freight electrical locomotives because of simple, space-saving and cost-effective. The failures of conical press-fit connections in a nose-suspension drive system are analyzed in this paper. It was showed by the analysis that the crack on the inner conical surface of motor shaft is initiated by the combination of fretting and corrosion. Sharp oil groove edge and emergency of crack at the mouth of radial oil hole in pinion will accelerate the formation of fretting wear groove, and consequently the initiation of cracks. Coexist of tensile normal stress under the contact surface within the fretting zone will benefit the propagation of the fretting fatigue cracks. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：158 / 167
页数：10
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