Employment of Two New Methods for the Research of Interaction of Wheel with a Flat and Rail

Bogdevičius, Marijonas; Žygienė, Rasa; Subačius, Rimantas

doi:10.4028/www.scientific.net/ssp.260.289

Cited by 4 publications

(4 citation statements)

References 15 publications

(17 reference statements)

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“…This wear generates impact loads that depend on the depth and length of the impact, as well as on the train load and train speed. This impact load can be several times higher than the wheel static load 6 – 9 . Wheel flats are the main causes of wheel bearing damage, axle temperature rise, axle fracture, as well as rail and concrete sleeper fracture 10 , 11 .…”

Section: Introductionmentioning

confidence: 93%

New support roller profile design for railway wheel re-profiling process by under-floor lathes with a single cutting tool

Corral

Meneses

Gómez

et al. 2022

Sci Rep

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The wheel re-profiling is an important part of railway wheelset maintenance. Researchers and railway operators have been very concerned about how to minimize the loss of time during wheel re-profiling without decreasing safety. Avoiding wheelset disassembly means considerable time savings, while reducing wheel damage during operation. Underfloor wheel lathes are the most appropriate tool to achieve this double objective, and therefore the most used nowadays. Multi-cut tool lathes have the disadvantage of being extremely expensive. On the other hand, with single tool lathes, re-profiling is not smooth or safe enough when current convex profile support rollers are used. It is well known by the companies that during reprofiling the wheel suffers impacts/damaged. In this article, a methodology to optimize the profile of the support rollers used in underfloor single tool lathes for railway wheel re-profiling is proposed. This novel profile design will minimize damage and increase the safety of such lathes, since it proposes a greater smoothness in the process. Simulations of re-profiling process have been carried out by the finite element method showing that the designed roller profile reduces drastically the impact/damage during the operation. The impact generated between the re-profiling wheel and the rollers is avoided. Profile-optimized support rollers have been used in a real underfloor wheel lathe, showing good results.

show abstract

Section: Introductionmentioning

confidence: 93%

New support roller profile design for railway wheel re-profiling process by under-floor lathes with a single cutting tool

Corral

Meneses

Gómez

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The impact load caused by wheel flats, depends on the depth and length of flats, as well as on the train speed and load. This impact load can be several times higher than the wheel static load [ 6] [ 7][ 8] [ 9]. Wheel flats are the main causes of wheel bearing damage, axle temperature rise, axle fracture, as well as rail and concrete sleeper fracture [ 10] [ 11] The wheel wear immediately affects the quality of the train's operation (stability, safety and passenger comfort) and the life of the rails [ 12][ 13] [ 14] For these reasons, the wheels have to be re-profiled to restore its geometry tread for purpose of maintenance.…”

Section: Introductionmentioning

confidence: 94%

New Support Roller Profile Design for Railway Wheel Re-profiling Process by Under-floor Lathes With a Single Cutting Tool

Corral¹,

Meneses²,

García³

et al. 2021

Preprint

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The wheel re-profiling is an important part of railway wheelset maintenance. Researchers and railway operators have been very concerned about how to minimize the loss of time during wheel re-profiling without decreasing safety. Avoiding wheelset disassembly means considerable time savings, while reducing wheel damage during operation. Underfloor wheel lathes are the most appropriate tool to achieve this double objective, and therefore the most used nowadays.Multi-cut tool lathes have the disadvantage of being extremely expensive. On the other hand, with single tool lathes, re-profiling is not smooth or safe enough when current convex profile support rollers are used.In this article, a methodology to optimize the profile of the support rollers used in underfloor single tool lathes for railway wheel re-profiling is proposed. This novel profile design will minimize damage and increase the safety of such lathes, since it proposes a greater smoothness in the process. Simulations of re-profiling process have been carried out by the finite element method showing that the designed roller profile reduces drastically the impact/damage during the operation. Profile-optimized support rollers have been used in a real underfloor wheel lathe, showing good results.

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“…The deterioration is the inevitable result of increasing wheel-rail contact force. Uncontrolled deterioration can, however, lead to wheel bearing damage, axle temperature increase, axle fracture, rail and concrete sleeper fracture, and rail deformation aggravation, which will seriously affect train safety [ 4 , 5 , 6 , 7 ]. The rapid and accurate detection of overrun flat wheels has become the most important issue for researchers.…”

Section: Introductionmentioning

confidence: 99%

In-Service Detection and Quantification of Railway Wheel Flat by the Reflective Optical Position Sensor

Gao

Feng

et al. 2020

Sensors

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Railway wheel tread flat is one of the main faults of railway wheels, which brings great harm to the safety of vehicle operation. In order to detect wheel flats dynamically and quantitatively when trains are running at high speed, a new wheel flat detection system based on the self-developed reflective optical position sensor is demonstrated in this paper. In this system, two sensors were mounted along each rail to measure the wheel-rail impact force of the entire circumference by detecting the displacement of the collimated laser spot. In order to establish a quantitative relationship between the sensor signal and the wheel flat length, a vehicle-track coupling dynamics analysis model was developed using the finite element method and multi-body dynamics method. The effects of train speed, load, wheel flat lengths, as well as the impact positions on impact forces were simulated and evaluated, and the measured data can be normalized according to the simulation results. The system was assessed through simulation and laboratory investigation, and real field tests were conducted to certify its validity and correctness. The system can determine the position of the flat wheel and can realize the quantification of the detected wheel flat, which has extensive application prospects.

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Employment of Two New Methods for the Research of Interaction of Wheel with a Flat and Rail

Cited by 4 publications

References 15 publications

New support roller profile design for railway wheel re-profiling process by under-floor lathes with a single cutting tool

New support roller profile design for railway wheel re-profiling process by under-floor lathes with a single cutting tool

New Support Roller Profile Design for Railway Wheel Re-profiling Process by Under-floor Lathes With a Single Cutting Tool

In-Service Detection and Quantification of Railway Wheel Flat by the Reflective Optical Position Sensor

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