A New Wheel Tread Structure for High-speed EMUs

Abstract

The invention relates to a novel wheel tread structure for a high-speed motor train unit, and belongs to the field of railway vehicle wheel tread structures. The wheel tread structure can be completely matched with and completely adapt to the profile of CN60 novel railways, and a small curvature radius of a first arc segment end surface of a throat root circle high taper region is adopted to avoid the destabilization of train wheels produced by that the equivalent taper of a tread is too high, and avoid the rocking of motor trains caused by that the equivalent taper of the tread is too low. A normal operating region cooperates with a low taper region at the outer side of an end part of the tread to have the effect of enlarging the contacting area of the tread and the railways, and the wheels can be allowed to bear a higher axle weight load under the same contact stress. According to the novel wheel tread structure disclosed by the invention, the purposes that the tread wear is retarded and the wheel rotating period is prolonged are achieved through optimizing the optimal position of a rolling circle, and the adaptability of the tread structure to the change of a steel rail profile is greatly improved through the given parameter settings which are calculated and preferred, and the purpose of obtaining the ideal effects of concurrently considering and balancing two aspects of restraining snaking motion and prolonging the wheel rotating period is achieved.

Description

technical field [0001] The invention belongs to the field of wheel tread structures of rail vehicles, and in particular relates to a novel wheel tread structure of high-speed EMUs. Background technique [0002] Such as figure 1 As shown, the tread structure of the wheel of the rail passenger car is the contour line formed by the rim and the tread M on the radial section of the wheel, and the tread structure generally includes a wheel rim 1, a throat root circular height taper according to a well-known definition method in the art Area 2, rolling circle 3, normal working area 4, outer end low taper 5 and outer end face chamfering area 6 and other main structures, their outer contour lines are connected in sequence to form the overall tread structure contour curve. Among them, the rolling circle 3 is defined as the position of point B at a distance of L1=70mm from the inner surface of the tread rim, and the vertical diameter of the rolling circle 3 is used as the dividing lin...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the wheel tread shapes of old models such as the existing domestic EMU S1002CN cannot match the old CH60 rail profile and the new 60N rail profile at the same time, and the wheel tread shapes of the existing old models cannot The technical problem of achieving the best consideration and balance in the two aspects of improving the turnaround cycle and improving the dynamic performance of the train at the same time, the invention provides a new wheel tread structure for high-speed EMUs

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