Steel wheel rail force loading platform and steel wheel rail force loading method
A technology of wheel-rail force and loading platform, which is applied in the direction of applying stable tension/pressure to test the strength of materials, can solve problems such as fracture, rail cracks, loss of life and property, etc., and achieves convenient use, reliable test results, and high loading force controllable effect
Inactive Publication Date: 2015-07-08
DALIAN UNIV OF TECH +1
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Problems solved by technology
When the rail temperature drops, an axial tension is generated in the rail; when the train passes at high speed, the wheels of the train will have a huge impact on the rail, and the wheel-rail force will cause the rail to vibrate and deform mainly vertically, especially in winter in cold regions , the longitudinal temperature tension in the rail is large, coupled with the long-term fatigue effect of the wheel-rail force, it will induce cracks or even fractures in the weak parts of the rail, which will cause loss of life and property
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[0017] The present invention will be further described below in conjunction with technical solutions and accompanying drawings.
[0018] A rail wheel-rail force loading platform, which is composed of a measuring unit 19, a bottom box girder 3, a column 4, a horizontal box girder 7, an actuating cylinder 11 and a special loading head 18; the measuring unit 19 is fixed on the inner arc of the tested steel rail 15 In the groove; used to measure the load-time curve of the rail 15; two bottom box girders 3 parallel to the track are respectively arranged on the ground on both sides of the test rail track, and the bottom box girder 3 is fixed on the ground by anchor bolts 1. A number of bolt holes are evenly distributed on the upper plane of the bottom box girder 3, and the two columns are respectively fixed on the two bottom box girders 3 by the column bolts 2, and the horizontal horizontal box girder 7 crosses the track and the two columns 4 are fixed by the beam bolts 6 Connection...
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The invention relates to a steel rail wheel-rail force loading platform and a steel wheel rail force loading method. A hydraulic actuating oil cylinder (11) and a special loading head (18) are utilized for simulating the action force of vehicle wheels on steel rails (5); the steel wheel rail force loading platform comprises bottom box girders (3), vertical columns (4), a cross box girder (7), an actuating oil cylinder (11), hinged support plates (10), an upper pressure plate (8), a loading head (18), a holding frame (15), a heightening hinged support (12), hinge pins and connecting bolts, wherein the positions of the vertical columns (4) and the cross box girder (7) on the bottom box girder (3) are adjustable, the actuating oil cylinder (11) is arranged below the cross box girder (7), the lower part of the actuating oil cylinder (11) is connected to the loading head (18), the posture of the loading head (18) is constrained by the holding frame (15), and the heightening hinged support (12) on the lower side surface of the vertical column (4) determines the posture of the holding frame (15), so that the direction of the loading force is changed. The loading force of the steel wheel rail rail force loading platform is controllable, and the steel wheel rail force loading platform is convenient to use.
Description
technical field [0001] The invention relates to a rail wheel-rail force simulation loading device, in particular to a high-speed railway seamless rail wheel-rail force simulation loading device. Background technique [0002] my country is a big railway country in the world, with passenger and freight lines all over the country. With the continuous increase of railway operation speed and carrying weight, the monitoring of railway rail safety is becoming more and more important. For the long rails of seamless lines, due to the constraints of rail joint resistance, fastener resistance and ballast bed resistance, when the rail temperature changes, longitudinal temperature forces will be generated in the long rails. When the rail temperature drops, an axial tension is generated in the rail; when the train passes at high speed, the wheels of the train will have a huge impact on the rail, and the wheel-rail force will cause the rail to vibrate and deform mainly vertically, especial...
Claims
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IPC IPC(8): G01N3/12
Inventor 戴恒震刘冲张志新任同群焦振华何亮王天娆张丽华
Owner DALIAN UNIV OF TECH