Magnetic field shielding structure of railway vehicle

Abstract

The invention discloses a magnetic field shielding structure of a railway vehicle. Effective shielding of a low-frequency magnetic field and a high-frequency magnetic field around a traction power supply main line is realized by arranging a sleeve with a carbon steel inner tube and an aluminum alloy outer tube and enabling the traction power supply main line to penetrate through the inner tube. Anannular inner cavity between the inner tube and the outer tube is sealed through a tube plug, the magnetic field shielding effect is further improved, and the risk that the inner tube and the outer tube are damaged can be reduced through the tube plug. A hoisting seat is utilized to realize the punching-free installation of the sleeve, and the hoisting seat has a wiring harness fixing function byarranging a through hole in the lower support of the hoisting seat. By optimizing the structure of the hanging seat, the inner tube extends into a socket pipe in a junction box and the like, so thatthe magnetic field shielding effect and the mounting stability of the sleeve are improved, and the sleeve is stably and reliably mounted on a railway vehicle.

Description

technical field [0001] The invention relates to the technical field of rail vehicles, in particular to a magnetic field shielding structure of a rail vehicle. Background technique [0002] Rail vehicles usually use high-voltage, high-current electric traction technology to provide vehicle power. The electric traction technology generates large traction power, so the traction current is also large, so that a large low-frequency magnetic field will be generated around the main traction power supply line. The low-frequency magnetic field Shielding of low-frequency magnetic fields is necessary due to possible adverse effects on passengers, especially those with implantable medical devices. [0003] At the same time, in order to control the traction force and speed of the rail vehicle, the rail vehicle is usually equipped with a traction converter, which is connected to the traction power supply main line. The traction converter uses IGBT as the switching element, and the switchi...

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Problems solved by technology

[0002] Rail vehicles usually use high-voltage, high-current electric traction technology to provide vehicle power. The electric traction technology generates large traction power, so the traction current is also large, so that a large low-frequency magnetic field will be generated around the main traction power supply line. The low-frequency magnetic field May adversely affect passengers, especially those with implantable medical devices, necessitating shielding from low frequency magnetic fields

[0003] At the same time, in order to control the traction force and speed of the rail vehicle, the rail vehicle is usually equipped with a traction converter, which is connected to the traction power supply main line. The traction converter uses IGBT as the switching element, and the switching process of the switching element will generate high These high-frequency interferences will also be conducted in the form of current in the traction power supply main line and may radiate out. These radiations may cause interference to on-board electronic equipment and electronic equipment near the track. Therefore, it is also necessary to conduct high-frequency magnetic fields. shield

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