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Economical turning repair wheel

An economical and wheel technology, applied in the direction of wheels, wheel manufacturing, and wheels characterized by track running parts, etc., can solve the problem of large amount of repairing of wheel treads, improve the repairing cycle, ensure stability, and prolong the use. effect of life

Inactive Publication Date: 2012-07-18
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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  • Abstract
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  • 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

Method used

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Experimental program
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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 relates to a wheel tread, and is characterized in that partial curve sections A, B, D, F, G, H and J of an XP55 type tread are reserved, simultaneously, a portion in a 16.5mm range from a vertex of a tread flange of curves of the XP55 tread to the inner side of a rolling circle translates by 4.5mm along a negative direction of an Y axis, the section B and the section D are smoothly connected with the section D and the section F respectively by two smooth curves, accordingly flange thickness Sd is 28mm, flange height Sh is 29mm, and a Qr value is 10.5mm. The economical turning repair wheel has the advantages that (1), the service life of the wheel is prolonged, maintenance cost is lowered, wheel turning repair period is prolonged properly, and repair workload is reduced; and (2), high-speed running stability and steadiness of a train on the curve sections are guaranteed, wheel-rail impact force of the train running on the curve sections at high speed is relieved, and the problem that action force of steel rails on the curves to wheel axles and a train body cannot suddenly disappear along with traversing of wheel pairs is avoided assuredly.

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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IPC IPC(8): B60B17/00
CPCB60B2310/231B60B17/00B60B2900/323B60B2900/131B60B17/0068B60B2900/113
Inventor 周文平李秋泽王兴宇谌亮
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD