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| 标 题： |
A comparison of techniques to determine the nominal life (L_(10)) on railway bearings
铁路轴承额定寿命（L_(10)）测定技术的比较 |
| 作 者： |
Numan Perales
Angel Hernandez
Diego Galar
Roberto Villarejo |
| 关键词： |
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| 出版年： |
2014 |
| 会议名： |
11th International Conference on Condition Monitoring and Machinery Failure Prevention Technologies (CM 2014 and MFPT 2014)
第11届国际设备状态监测与机械故障预防技术会议（CM 2014 和 MFPT 2014） |
| 届 次： |
11th |
| 摘 要： |
Bearings are one of the most important components in a railway vehicle for safety, since a failsafe design is not available. Contact fatigue, internal clearance, corrosion, and contamination of the lubricating oil can cause bearing failures. Generally, failures show up as imperfections in the ball race, in the ball/roller or in the retainer. The more frequent defects are caused by contact fatigue [1]. The analytical methodology (Methodology I) is an alternative approach proposed by the authors [1], inspired by a procedure used to design rail shafts [2]. The purpose is to compare the obtained life using methodology I, with the life estimated by LKAB company. The latter uses a calculation method well-established in manuals of bearing manufacturers such as SKF and Timken. This is to avoid a drawback observed in this type of approach, namely, the lack of rigour in defining terms associated with the mathematical model used to estimate L_(10). The research goal is to perform an inspection and analysis of the functioning of the bearings most commonly used on railways in order to estimate the bearings' life under real operating conditions.
轴承是铁路车辆中最重要的安全部件之一，因为无法采用失效保护设计。接触疲劳、内部间隙、腐蚀以及润滑油污染都可能导致轴承损坏。通常，故障表现为滚珠轨道、滚珠/滚轮或保持架的缺陷。其中最常见的缺陷是由接触疲劳引起的[1]。作者提出的方法（方法一）是一种替代方案[1]，其灵感来源于铁路轴设计中的一种方法[2]。该方法旨在将使用方法一所得的寿命与LKAB公司估算的寿命进行比较。后者采用的是SKF和Timken等轴承制造商手册中广泛应用的计算方法。此举意在避免此类方法存在的一个缺点，即在定义用于估算L_(10)的数学模型相关术语时缺乏严谨性。本研究的目标是对铁路中最常用的轴承运行状况进行检查和分析，以评估轴承在实际运行条件下的使用寿命。 |
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