A superconduct magnet for eddy current braking of a high-speed train
An eddy current braking, high-speed train technology, applied in the direction of superconducting magnets/coils, brakes, magnetic objects, etc., can solve the problems of high electric power, non-adjustable braking force, low operating cost, etc., to increase the magnetic flux density and braking force, The effect of reducing energy consumption and reducing refrigerant loss
Active Publication Date: 2018-12-28
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology
The advantages of permanent magnet eddy current braking are no external power supply, light weight, small heat load, and low operating cost, but the disadvantages are that the braking force cannot be adjusted, and the non-working state is magnetic.
At this stage, electromagnetic eddy current braking adopts conventional magnets, that is, iron core windings. The advantages are such as large braking force, adjustable excitation current and adjustable braking force. Therefore, electromagnetic eddy current braking is the future of high-speed train eddy current braking technology. The main development direction, but there are still disadvantages such as large power consumption, high coil temperature, and braking force limited by weight and volume
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specific Embodiment approach 1
[0026] Specific implementation mode one: as figure 1 As shown, the superconducting magnet for superconducting eddy current braking of a high-speed train mainly includes a superconducting coil 1, a superconducting coil container 2, a refrigerant inlet and outlet 3, a transverse tie rod 4 and a vertical tie rod 5, a coil terminal inlet and outlet 6, a limiter Bit block 7, liquid level gauge 8, temperature sensor 9. The external connection mechanism can fix the superconducting magnet on the bottom of the high-speed train bogie through the Dewar 23, and there is a certain air gap between the top surface of the guide rail below the bogie; the superconducting magnet can generate electricity with the high-speed train track after being excited. The eddy current effect produces a braking force opposite to the direction of the train to achieve braking of the high-speed train; the superconducting magnet can adapt to the impact of the train vibration on the superconducting magnet through ...
specific Embodiment approach 2
[0037] Embodiment 2: This embodiment differs from Embodiment 1 in that the material of the superconducting coil is a high-temperature superconducting wire, block or strip, and other parameters are the same as Embodiment 1.
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A superconduct magnet for eddy current braking of a high-speed train is provided. The superconduct magnet for eddy current braking of a high-speed train is fixed at that bottom of a bogie of the high-speed train through a connecting mechanism, and an air gap is arranged between the superconducting magnet and the top surface of a guide rail under the bogie; after excitation, the superconducting magnet can generate eddy current effect with the guide rail of the high-speed train, and generate braking force opposite to the running direction of the train, so as to realize braking of the high-speedtrain; a liquid level detection sensor is arrange on the superconducting magnet to detect the position of the liquid level of the refrigerant in real time; the superconducting magnet can adapt to theimpact on the superconducting magnet caused by the vibration when the train is running at high speed through the elastic tie rod. A superconduct magnet for eddy current braking of a high-speed train has good adaptability under a high-speed running environment of the train.
Description
technical field [0001] The invention belongs to the technical field of high-speed train braking, in particular to superconducting magnet technology for eddy current braking of high-speed trains. Background technique [0002] At present, the braking methods of high-speed trains mainly include pad brakes, disc brakes, and electric brakes. The above brakes are all adhesive brakes, and their active effect is affected by the adhesion performance between the wheel and rail, that is, the friction coefficient of the wheel and rail, and the mechanical friction pressure of brake discs, brake pads and other components is large, and the loss is serious. For a given train and operating route, the wheel-rail friction coefficient is mainly affected by the following factors: 1. Rail surface conditions, harsh natural conditions such as rain, snow, ice, and fallen leaves will greatly reduce the wheel-rail friction coefficient; 2. Train speed, wheel-rail friction coefficient, etc. The rail fr...
Claims
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IPC IPC(8): H01F6/00H01F6/04H01F6/06B60L7/28
CPCB60L7/28H01F6/00H01F6/04H01F6/06B60L2200/26B60T13/748B61H7/083F16D63/008F16D2121/20H01F2027/406B61H11/00
Inventor 宋云涛方超卫靖戴文华杜双松
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI