• Title, Summary, Keyword: wheel wear

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A study on the prediction of wheel wear of railway rolling stock (철도차량 차륜마멸예측에 관한 연구)

  • Kang, Bu-Byoung;Chung, Heung-Chai
    • Proceedings of the KSME Conference
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    • pp.1270-1276
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    • 2003
  • This paper describes an analytical method for wheel wear prediction. The outputs from vehicle dynamic software are used to calculation the wheel wear. Two calculation examples are shown for a high-speed line and a conventional line. Through the comparison of two cases, we can see the wheel wear characteristics on the conventional line and the high-speed line. The conventional line has many curved tracks that cause severe wheel flange wear. The influences of curve radius on wheel wear are also described considering the operational performance of the high speed trainset. A method of calculation using contact patch work model is presented for determination of the evolution by wear railway wheels.

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a city railroad rolling-stock wheel wear and study about maintenance standard (도시철도차량 차륜마모 특성 및 유지보수기준에 관한 연구)

  • Park, Soo-Choong;Ji, Yong-Hyeon;Kim, Eun-Sil
    • Proceedings of the KSR Conference
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    • pp.806-812
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    • 2008
  • Many kinds of rolling-stocks that have various control methods are being operated by Seoulmetro which is a history of a city railroad rolling-stock. Seoulmetro is being faced with a wheel management comparing of other lines with a perpendicular wear of wheel and a side damage, and so on, by operating several cars at a loop line. This is causing maintenance expenses increase and deteriorating a fusibility of rolling-stock, for it has an effect on a rolling-stock using. A cutting pattern of wheel and a wear form affect the expected span of a wheel. A wheel cutting cause is classifed into cutting for reprofiling of a flange wear of wheel and for removing every kind defect which originates from wheel wear. In this study, Seoulmetro exhibit a stable rolling-stock use method and a reasonable management method of wheel, analysing wheel exchange condition and cutting management of wheel.

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Arc-type Wheel Profile Design and Test Results (원호형 차륜답면형상(안) 설계 및 현차시험 결과)

  • 허현무;권성태;이찬우;구동회
    • Journal of the Korean Society for Railway
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    • v.7 no.2
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    • pp.130-136
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    • 2004
  • The rolling-stocks on conventional line have suffered wheel problems due to the incompatibility between wheel and track condition. Especially, The 1:40 coned wheel profile's wear is very severe and these increase wheel maintenance cost. Thus we designed several arc-type wheel profiles coned 1:/20 to reduce the wheel flange wear and analyzed the dynamic performance of designed profiles. Tests carried out in service line to analyse the dynamic performance and verify the wear reduction for two cases of profiles. Test results shows the equal level of dynamic performance and the improvement of wheel flange wear compared with the conical wheel profile coned 1:40.

Evaluation and Analysis of Wheel alignment Effecting on Tire Uneven Wear (휠 얼라이먼트 값과 타이어 편마모 영향도 평가 및 분석)

  • Chung, Soo-Sik;Jung, Won-Wook;Lee, Sang-Ju;Koh, Bum-Jin;Choi, Young-Sam
    • Proceedings of the KSME Conference
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    • pp.1658-1662
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    • 2007
  • The tire uneven wear has been an ongoing concern for a long time, and one of customer's complaints too. This paper deals with uneven wear improvement of passenger car tires, to have tested the tire wear levels by each wheel alignment set (according to changing toe and camber) using taxis. The pre-set wheel alignments on test vehicle were gained by energy friction simulation of tire. The result of this experiment was as follows : First, verified the effects of initial wheel alignment (adjusted at Curb Vehicle Weight) to minimize tire uneven wear. Second, tire uneven wear makes tire life much shorter than even wear does.

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Prediction of Wheel Wear when Surface Grinding by Dual Detection Methods (평면연삭시 복합검출방법에 의한 숫돌마멸 예측)

  • 왕덕현
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • pp.172-177
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    • 1998
  • An experimental study on the prediction of grinding wheel wear by dual detection methods was conducted by the laser displacement and acoustic emission(AE) system. The laser displacement sensor was located above the head of the grinding wheel and the AE sensor was set under the workpiece, where the wheel were condition can be detected. It was found that the dual detection methods by laser displacement system and AE system made it possible to predict the wheel wear. From the experiments, the root mean square(RMS) values both methods was found to be proportional to the grinding wheel wear.

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A Study on the Wheel Wear of High Speed Train Running on the Conventional Line (경부고속열차의 기존선 주행시 차륜마멸특성에 관한 연구)

  • 강부병;이희성
    • Tribology and Lubricants
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    • v.19 no.4
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    • pp.187-194
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    • 2003
  • This paper describes the characteristics of wheel wear of high speed train running on the conventional line. Conventional line has many curved tracks that cause severe wheel flange wear. The influences of lubrication, cant deficiency, curve radius on wheel wear are also described considering the operation performance of the highspeed trainset. A method of calculation using contact patch work model is presented for determination of the evolution by wear of railway wheels.

Analysis on the wear patterns of wheel profiles for conventional line (기존선 차륜답면형상의 마모패턴 분석)

  • Hur Hyun-Moo;Lee Chan-Woo;Kwon Sung-Tae;Yun Chun-Han
    • Proceedings of the KSR Conference
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    • pp.651-655
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    • 2003
  • The rolling-stocks used in conventional line have suffered wheel problems due to lack of adaptability with track. These brought out severe wheel flange wear, these have caused unstable ride characteristics of rolling-stock. Especially, Wheel flange wear is severely influenced by wheel profile but lateral suspension characteristics. This study was started to induce wheel profile suitable for domestic railway environment. Thus, we analyzed the wear characteristics of wheel profiles that are being applied to railway rolling-stock in KNR. To analyze wheel wear characteristics, we have conducted experiment studies for passenger rolling-stock and obtained useful datum.

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An Analysis on the Variation of the Wheel/Rail Contact Geometry with the Wheel Wear of EMU (전동차 차륜 마모에 따른 차륜/레일 기하학적 접촉 특성 변화 분석)

  • Hur, Hyun-Moo;Park, Joon-Hyuk;You, Won-Hee;Park, Tae-Won
    • Proceedings of the KSME Conference
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    • pp.854-859
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    • 2008
  • In a railway vehicle, contact between wheel and rail is a peculiar characteristic and variations of wheel and rail profile influence on the dynamic characteristics of railway vehicle. Thus the variations of the wheel and rail profile are very important in railway dynamics. Recently a research relating to active steering to improve the curving performance of vehicle is progressing actively at home and abroad. In this field, a pre-study for the wheel/rail contact geometry is needed and especially the variation of the wheel/rail contact geometry with wheel wear is the key design parameter to develop the controller of the active steering bogie. In this paper, we have experimentally studied to analyze the variation of the wheel/rail contact geometry with wheel wear as a pre-study to develop the active steering bogie for electric multiple unit (EMU). For this, we have made an experiment with EMU operating in curving area. We have measured the wear profiles of the wheel of the test vehicle and analyzed the wheel/rail contact geometry with a mileage of the test vehicle. In experiment with test vehicle, we have got the useful data to design the steering controller of the wheelset.

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Analysis on the Running Stability of Rolling-stock according to Wheel Profile Wear (차륜답면형상 마모에 따른 차량 주행안정성 영향 분석)

  • Hur, Hyun-Moo;You, Won-Hee
    • Journal of the Korean Society for Precision Engineering
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    • v.28 no.5
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    • pp.551-558
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    • 2011
  • To analyze the effect of wear of wheel profile on the running stability of rolling-stock, theoretical and experimental studies were conducted on the profiles used in conventional lines. In experiment using 1/5 scale model to verify the results of the theoretical analysis, the test results of the critical speed for worn wheel profile samples show similar trend. In case of the conical type wheel profile(Profile 40), the equivalent conicity is increased with flange wear. But in case of the arc type wheel profile(Profile 20h), the equivalent conicity is decreased with flange wear. And the critical speed of the bogie was inverse proportion to the equivalent conicity. It is shown that the variation of the critical speed with the wheel wear could be changed according to the design concept and wear pattern of wheel profile. Results of the theoretical and experimental studies are discussed here.

A Wheel Wear Analysis of Railway Vehicle on a Curved Section (곡선 구간에서 철도 차량 휠의 마모 특성 해석)

  • Kang, Juseok
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.40 no.6
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    • pp.547-555
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    • 2016
  • The wheel wear of a railway vehicle is mainly generated when maneuvering on a curved track. The change in the wheel profile affects the dynamic stability of the vehicle. In this analysis, the wheel wear volume was calculated while changing the velocity and radius of the curve to analyze the wear characteristics of a wheel at a curved section. The wear index was calculated from a vehicle dynamic analysis based on a multibody dynamics analysis and wear volume from a wear model by British Rail Research. The wear volume at a radius of 300 m is dominant compared with other radii. The wear volume was calculated by assigning different coefficients of friction to the tread and flange of the wheel to investigate the effect of lubrication on the wear characteristics. The effect of the improvement by lubrication is calculated by varying the radius of the track, and is assessed on an actual urban railway section.