A high-speed wheel tread structure suitable for wide rails in alpine regions

A technology for wheel treads and alpine regions, applied in the direction of rim measurement/measurement, etc., to achieve the effects of suppressing meandering motion, prolonging the repair cycle, and increasing service life

Active Publication Date: 2021-11-23
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem that the wheel tread of the existing domestic 300km / h speed grade cannot match the rail profile, gauge, and rail bottom slope adopted in Russia, the purpose of this invention is to provide a new type of high-speed rail suitable for wide rails in alpine regions. The wheel tread structure can achieve a balance between restraining snaking motion and prolonging the turnaround period

Method used

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  • A high-speed wheel tread structure suitable for wide rails in alpine regions
  • A high-speed wheel tread structure suitable for wide rails in alpine regions

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Embodiment Construction

[0017] refer to figure 1 The specific embodiment of the present invention includes the rim area, the tread area, and the transition area between the rim and the tread, and the rim part is connected smoothly by three sections of arcs BC, CE, EF and two straight lines AB, FG , the radius of the first arc BC is 19-21mm, the radius of the second arc CE is 11-13mm, the radius of the third arc EF is 19-21mm, and the angle between the extension line of the straight line FG and the horizontal line is 70°

[0018] The tread area is connected tangentially and smoothly by two sections of arcs JK, KM and two sections of oblique lines MN, NO in sequence, the OP section at the outer end is chamfered at 45°, and the radius of the first section of arc JK is 345-355mm , the radius of the second arc KM is 490-510mm, the slope of the first oblique line MN is 1 / 13-1 / 11, and the slope of the second oblique line NO is 1 / 9-1 / 7. Point L is the highest point of the rolling circle, and points A and L ...

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Abstract

A high-speed wheel tread structure suitable for wide rails in alpine regions belongs to the technical field of rail vehicle wheel treads. Through the reasonable design of the parameters of each part of the tread, the tread has a reasonable initial range of equivalent taper, avoiding the problem of excessively small equivalent taper. A snaking movement will cause the vehicle to vibrate at a low frequency and reduce ride comfort; at the same time, it can also avoid the problem that if it is too large, it will easily cause bogie instability in the later stage of the wheel repair cycle, reduce the vehicle's operating safety and ride comfort, and shorten the wheel repair cycle combined with the actual research status of Russia's existing high-speed rail lines, and matching reasonable suspension parameters, the wheel turning repair cycle was extended and the service life of the wheels was increased. Through the analysis of the actual measurement data of the track operation of the Russian high-speed railway, the invention has the characteristics of low wear and strong line adaptability, and achieves both consideration and balance in suppressing snaking motion and prolonging the turnaround period.

Description

technical field [0001] The invention relates to a wheel tread of a rail vehicle, in particular to a high-speed wheel tread structure suitable for wide rails in alpine regions. Background technique [0002] As the core technology of high-speed EMUs, wheel tread structure design is generally based on the adaptability of the tread structure to the rail, tread wear, vehicle lateral stability, vehicle body stability, wheel-rail contact stress, contact angle difference, vehicle suspension parameter adaptability, etc. Comprehensive consideration, in order to screen out the tread structure parameters of the wheel with the best adaptability to the equivalent taper of the tread, so as to achieve the best results in suppressing snaking motion, improving the stability of high-speed trains, reducing wheel rim wear, prolonging the wheel cycle, and increasing the service life of the wheel. Excellent consideration and balance. [0003] At present, the wheel tread structure used in Russia's...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61K9/12
CPCB61K9/12
Inventor 宋春元赵文学韩庆利李晓峰
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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