Wheel treads, wheels, variable gauge steering systems and vehicles

Abstract

The invention relates to the technical field of rail transit equipment, and particularly relates to a wheel tread, a wheel, a gauge-changeable steering system and a vehicle. The wheel tread is appliedto a gauge-changeable rail, the rail matched with the wheel tread is provided with at least two rail cants, the wheel tread comprises a rim, a high-taper area, a normal working area and a low-taper area which are connected continuously and smoothly, and the rim and the high-taper area are provided with opposite arc-shaped end faces respectively; a rolling circle is formed in the normal working area, the position where the rolling circle is located is a tread horizontal datum line, and when the rolling circle transversely moves, the normal working area and the rail are matched with corresponding equivalent tapers under each set of gauges and rail cants respectively. The wheel tread can adapt to two or more gauge rail system environments, and can enable a high-speed train to have a good wheel-rail contact relation, so that the train can run more stably.

Description

Technical field [0001] The invention relates to the technical field of rail transit equipment, in particular to a wheel tread, a wheel, a gauge-changeable steering system and a vehicle. Background technique [0002] The track system parameters of different countries are different, and the difference is mainly due to the difference in track gauge and track bottom slope of the country. Among them, the distribution range of gauge difference is 1000~1667mm, the distribution range of rail bottom slope difference is 1 / 20~1 / 40, and the rail profile and grinding standards are also different. [0003] On the one hand, there are many different gauges of railways in many countries. For example, China adopts 1435mm standard gauge, which covers 60% of the world's railways; while Russia uses 1520mm. Since the wheels usually have tapered treads, when the gauge is enlarged due to the outward movement of a strand of rail, the point of action of one wheel rail moves laterally, which easily causes t...

AI Technical Summary

Problems solved by technology

[0004] On the other hand, when there is a large difference in the rail bottom slope, it is easy to make the wheel-rail contact relationship poor, the contact point distribution is uneven, most of the contact points are concentrated in inappropriate positions, and there is no contact point transition in the root area of ​​the wheel rim, so that The wheel-rail contact surface is small, the wheel-rail force is uneven, the lateral bias force is large, and the additional bending stress generated at the rail waist is relatively large, resulting in excessive wheel-rail fatigue damage, which is not conducive to prolonging the service life of the wheel-rail. And it will also cause the problem that the equivalent taper of the rim tread is extremely reduced

[0005] It can be seen that when there are two or more gauge rail system environments, the excessive difference in gauge and bottom slope of high-speed trains will lead to poor wheel-rail contact and unstable train operation.

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