Failure Fault Analysis and Improvement Recommendations for Axlebox Bearing Failures in Metro Vehicle
Journal Title: Urban Mass Transit - Year 2025, Vol 28, Issue 3
Abstract
［Objective］ Axlebox bearing failures in metro vehicles can lead to wheelset seizing, resulting in scenarios ranging from passenger evacuation and vehicle rescue to severe incidents such as interval blockages or even derailments. These failures significantly compromise vehicle service performance and operational safety. A particular metro line experiences two instances of bearing failure during operation, necessitating an in-depth analysis of the root causes. ［Method］ A detailed sampling analysis is conducted on the failure axlebox bearing components. Retrospective checking of the maintenance and operational processes are traced, and tracking tests are conducted on vibration, temperature, and imaging of bearings from the same batch under same operating conditions. Additionally, a systematic analysis is conducted on the installation structure and fitting dimensions of the bearings and the auxiliary components. ［Result & Conclusion］ The analysis results reveal that the chamfering of the insulation board in the axle-end grounding device exceeds the upper design limit, leading to poor sealing at the joint surface. During vehicle operation, air-conditioning condensate infiltrates the axlebox bearings along the joint surface, causing emulsification and degradation of the lubricant, which results in reduced lubrication performance, bearing overheating and eventual bearing failure.
Authors and Affiliations
Weilong ZHAO, Xuewen LIANG
Keywords
Related Articles
- EP ID EP760178
- DOI 10.16037/j.1007-869x.2025.03.058
- Views 20
- Downloads 0
Construction and Operation Development of Low-Capacity Urban Rail Transit System
［Objective］ With the advantages of diverse functional positioning, flexible line layout, economic and environmental protection, low-carbon, etc., the low-capacity urban rail transit system has become an important part...
Study on Stress and Deformation Mechanism of Side Pile and Middle Column for PBA Method Metro Station in Loess Area
[Objective] In order to ensure the stability of important vertical load-bearing components in the process of station construction with PBA (pile-beam-arch) method in loess area, it is necessary to study the stress and de...
Exploration and Practice of Nanjing Metro Digital Transformation
[Objective] Digital transformation is an inevitable trend for urban rail transit enterprises during the shift from high-speed growth to high-quality development. It is necessary to study the top-level design, path select...
Optimization of Urban Rail Transit Train Stock Utilization under Re-coupling Operation Mode
［Objective］ Re-coupling operation mode can effectively improve the matching degree between the passenger flow and the transport capacity of urban rail transit, while it also poses challenges to the formulation of the t...
Key Waterproof Technologies for Integral Underground Station with Assembled Superposed Structure in Urban Rail Transit
[Objective] In order to improve the waterproof performance of the integral underground station with assembled superposed structure (abbreviated as AS station) and help its application in urban rail transit projects, it i...