Investigation on features and tendencies of axle-box heating

Lunys, Olegas; Dailydka, Stasys; Бурейка, Гинтаутас

doi:10.21307/tp-2015-011

Cited by 10 publications

(3 citation statements)

References 6 publications

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“…A hot-box detector is intended to detect the heat radiating from a bearing shortly before failure from overheating. The rate of heating can cause components in the bearing to rise to temperatures upward of 800°C (1472°F) in a span of nearly 25 minutes [10]. The addition of more detectors on the track has been implemented in the past, however, this has had a limited effect due to the rapid failure modes associated with overheated bearings [9].…”

Section: Current Problems and Developments In Wayside Hot-box Detectomentioning

confidence: 99%

An investigation into wayside hot-box detector efficacy and optimization

Tarawneh

Aranda

Hernandez

et al. 2019

International Journal of Rail Transportation

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Wayside hot-box detectors (HBDs) are devices used to assess the health of railcar components including bearings, axles, and brakes by monitoring their temperatures. HBDs use infrared (IR) sensors to record the temperatures of railroad bearings. Bearings that trigger an alarm or exhibit warm trending are removed and sent for inspection. In many cases, no discernable defects were found in the flagged bearings. Motivated by this finding, an investigation was conducted which included performing a controlled field test as well as exhaustive laboratory testing utilizing an HBD simulator. Data acquired from field and laboratory testing was used to evaluate the accuracy and efficacy of wayside HBDs. The results suggest that the scanning location on the bearing cup significantly affects the temperature measurement. Different calibrations for the field-and laboratory-acquired data were also explored. An optimized calibration technique along with proper IR sensor alignment can markedly improve the accuracy of HBD measurements.

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Section: Current Problems and Developments In Wayside Hot-box Detectomentioning

confidence: 99%

An investigation into wayside hot-box detector efficacy and optimization

Tarawneh

Aranda

Hernandez

et al. 2019

International Journal of Rail Transportation

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“…이는 열차 운행구 간에서의 예상치 못한 철도 차량 및 철도 시설물의 기계적 또는 물리적 결함과 이상 기후 및 자연 재해로 인한 위험 요소를 사 전에 검지하여 열차 안전 운행과 시설물 보호를 실행하는 역할을 하는 안전장치의 개념이 고속철도를 중심으로 확산되면서, 다양 한 센서 기술과 열차 검지 기술의 신뢰성과 가용성이 속도 개념 과 연계하여 논의되었다 [2]. 특히 고속으로 주행하는 열차의 차 축 과열로 인한 탈선사고의 사전 예방을 목적으로 사용되는 차축 온도 검지장치의 경우에는 기존의 설비가 대부분 300 km/h 전후 에서 동작하도록 개발되었고 [3][4], 운영 환경에 따라 수시로 오 동작이 발생함으로서 열차 운행 지연 및 대형 사고에 대한 안전 불감증 등으로 관련 설비에 대한 조사, 분석이 실시되었다 [5]. 그 결과, 국외에서 수입에 의존하던 차축온도 검지장치의 문제점 보 완 및 고속화 열차 운행에 부합하는 국산화 요구사항에 부합하도 록 350 km/h 이상의 속도로 주행하는 열차의 차축온도 검지장치 를 개발하였고 [6][7], 관련 속도 검증에는 회전체를 이용하여 시 뮬레이션하였다 [8].…”

Section: 서 론 경부고속철도의 도입으로 고속철도의 중요성이 매우 크게 부 각되고 있으며 최근에는 호남고속선이 개통되unclassified

Verification of High Speed Performance for the Electronic Pedal using a Rotor

Kim¹,

Go²,

Yoon³

et al. 2016

The Transactions of The Korean Institute of Electrical Engineer

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-In this paper, we have checked a method of performance evaluation for electronic pedal, which is a core technology of HBD for detecting the axle temperature of high-speed train. As it is practically impossible to conduct train speed test of 500 km/h, we utilize a high speed rotor for evaluating high speed performance of the electronic pedal instead. According to this method, we found that the measurement results by the velocity measuring instrument is similar with the ones from this research through the high speed rotor. In conclusion, it will be possible to conduct reliability evaluation for high speed performance for Beacon, Balise and RFID, which are utilized for transmitting vital information of train control systems through using the rotor.

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“…Several papers exposing the results of applying those techniques (or improved versions of them) can be found in the scientific literature. [5][6][7][8][9][10][11][12][13][14][15][16] However, most of these techniques require specific equipment that makes their implementation on in-service rolling stock difficult.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of chromatographic spectral technique applied to a high‐speed train

Bustos

Rubio

Castejón

et al. 2021

Struct Control Health Monit

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High-speed rail is a key player in people's mobility thanks to its speed and high safety standards. These high safety standards are supported by extensive maintenance (of both rolling stock and track) that applies the latest nondestructive and monitoring techniques. In that context, this work presents the enhanced graphical representation of state configurations (EGRSC) and enhanced chromogram of bands of frequency (ECBF) methods, which are the evolution of the graphical representation of State configurations and chromogram of bands of frequency techniques. A clearer nomenclature is defined for the configuration states of the EGRSC. The ECBF introduces a new variable threshold that allows discarding frequency regions with small power variations and a new color palette. These methods are used in the vibratory study of an inservice high-speed train to identify the operating condition of the train. To conduct that task, a set of accelerometers is installed on the axle box of a trailer axle of the train. Accelerometers are oriented into the three space directions: longitudinal, lateral, and vertical. Vibration signals are taken during the normal operation of the train and transmitted to and stored on a remote database.Vibration measures are collected before and after a major maintenance operation. The application of EGRSC and ECBF allows collecting information from thousands of vibration signals and to display that information intuitively and understandably. The analysis of EGRSC and ECBF results allows identifying several frequency regions with significant spectral power variations that are common to the three vibration directions studied. These patterns should be taken as a reference for future maintenance actions. Any unexpected behavior of these frequency regions would indicate the presence of a fault.

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Investigation on features and tendencies of axle-box heating

Cited by 10 publications

References 6 publications

An investigation into wayside hot-box detector efficacy and optimization

An investigation into wayside hot-box detector efficacy and optimization

Verification of High Speed Performance for the Electronic Pedal using a Rotor

Enhancement of chromatographic spectral technique applied to a high‐speed train

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