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Economical turning repair wheel

An economical and wheel-based technology, which is applied in the direction of wheels, wheel manufacturing, and wheels characterized by rail running parts, can solve the problem of large amount of wheel tread repair, so as to improve the turn repair cycle, ensure stability, and reduce maintenance workload effect

Inactive Publication Date: 2014-03-19
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new type XP55-28 economical tread wheel for repairing the large amount of wheel tread during the three-stage repair of the current CRH5 EMU bogie.

Method used

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Embodiment Construction

[0022] refer to figure 1 , 2 3. The XP55-28 economical refurbished wheel tread is based on retaining the A, B, D, F, G, H, J curve section 3 of the existing XP55 tread profile, and the original XP55 tread from the rim apex The feature section 2 is translated 4.5mm along the negative direction of the Y axis within 16.5mm of the rolling circle (y=70, z=0). Since the smoothness of the curve is damaged due to the translation, two quaternary transition curves are adopted. Segment B, D, and D, F are smoothly connected by segment E and E curve segment to obtain XP55-28 tread characteristic segment 1. The rim thickness Sd of XP55-28 tread is 28mm, the rim height Sh is 29mm, and the Qr value is 10.5 mm, Dr, Δr is a point on the radius of the rolling circle, L2 is the distance from the position of the rolling circle to the inside of the wheel, L1 is the distance from the measuring point of the rolling circle to the apex of the rim, L3 is the vertical distance from the Qr value measurin...

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Abstract

An economical turning repair wheel. A wheel tread of the economical turning repair wheel is formed by reserving curved sections A, B, D, F, G, H and J (3) of an XP55 type tread part, meanwhile shifting a part (2) within the range of 16.5 mm from the top point of a tread wheel flange of the XP55-type tread curve to the inside of a rolling circle by 4.5 mm along the negative direction of a Y-axis, and smoothly connecting the sections of B and D and the sections of D and F by two sections of smooth curves, so that the thickness Sd of the wheel flange is 28 mm, the height Sh of the wheel flange is 29 mm and a Qr value is 10.5 mm. The wheel has the following positive effects: the service life of the wheel is prolonged, the maintenance cost is reduced, the turning repair period of the wheel is prolonged, and the repair workload is reduced; and the stability and smoothness of a train which runs on curved sections at high speed are guaranteed, the impact force between the wheel and the rail generated during the high-speed running of the train at the curved sections is alleviated, and acting forces from steel rails on the curves to a wheel shaft and a train body do not disappear suddenly along with the transition of wheel sets.

Description

technical field [0001] The invention relates to the design field of the bogie of a train set, in particular to a tread surface of an XP55-28 economical turning repair wheel applied to the bogie of a CA250 train set of a CRH5 type train. Background technique [0002] The shape of the wheel tread plays a vital role in the dynamic performance of the train. After the high-speed EMU train enters the curve section, in order to ensure the continuity and smoothness of the train operation and balance the centrifugal force, it is necessary to set a certain Therefore, a transitional curve must be inserted between the straight line segment and the circular curve segment of the wheel tread profile. The curvature of the transitional curve needs to change continuously from zero on the straight line to the curvature of the circular curve, so as not to cause the wheel-rail force mutations, thereby improving the stability of trains running on high-speed curves. At present, according to the n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60B17/00
CPCB60B2900/323B60B2900/131B60B2900/113B60B2310/231B60B17/0068
Inventor 周文平李秋泽王兴宇谌亮
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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