Rail transit magnetic track brake provided with horizontal magnet exciting coils

Abstract

The invention relates to a rail transit magnetic track brake provided with horizontal magnet exciting coils and applied to rail transit vehicles. A magnet exciting coil assembly of the magnetic track brake is transversely and horizontally arranged in an iron core unit. The magnet exciting coils are totally arranged in the iron core unit. The magnetic flux generated by the magnet exciting coil is almost completely closed in an iron core. Large brake force is provided by means of a few magnet exciting coils or low exciting current. The utilization rate of the magnetic flux of the magnet exciting coils is increased, and the conversion rate of brake force is increased. The magnet exciting coils are completely arranged in the iron core. Two end assemblies and the iron core unit form an inner cavity wrapping the magnet exciting coil assembly together, and it is guaranteed that the magnet exciting coils can be fully protected; and the reliability of the magnetic track brake is improved. When the rail transit magnet track brake acts, the lower end face of a barrier clearing plate is in contact with the upper end face of a track prior to the iron core unit, and foreign matter possibly existing on the surface of the track is removed; and it is guaranteed that pole shoes are in good contact with the surface of the track, and large brake force is obtained.

Description

technical field [0001] The present invention relates to the technical field of rail vehicle braking, in particular to a rail transit magnetic rail brake with a horizontally arranged excitation coil for rail transit vehicles. Background technique [0002] With the development of rail transit braking technology, magnetic rail brakes have been developed for many years as an important component of braking force output during emergency braking of vehicles. The excitation coil of the existing magnetic rail brake is usually arranged vertically relative to the rail surface, and the U-shaped iron core with the opening facing down wraps the lower half of the excitation coil, and the U-shaped iron core cannot completely cover the electromagnetic path of the upper half of the excitation coil. The disadvantage of this structure is that a considerable proportion of the upper half of the magnetic flux generated by the excitation coil is closed in the air and does not pass through the iron ...

AI Technical Summary

Problems solved by technology

The excitation coil of the existing magnetic rail brake is usually arranged vertically relative to the rail surface, and the U-shaped iron core with the opening facing downward wraps the lower half of the excitation coil. The U-shaped iron core cannot completely cover the electromagnetic path of the upper half of the excitation coil.

The disadvantage of this structure is that a considerable proportion of the upper half of the magnetic flux generated by the excitation coil is closed in the air without passing through the iron core, resulting in the loss of electromagnetic force; because only the lower half of the excitation coil is wrapped inside the U-shaped iron core While being protected, the upper part of the excitation coil protected only by the thin excitation coil protective case is vulnerable to external damage; due to the inevitable gap between the iron core and the coil protection case, there will be a gap between the iron core and the coil during the driving of the vehicle. Frequent vibrations are generated, which increases the noise during the driving process of the vehicle and easily causes the iron core and the coil protection shell to collide with each other and wear excessively, which affects product reliability

[0003] Chinese Patent No. CN200580015726 discloses a magnetic track brake, specifically disclosing the following features: the brake electromagnet includes an excitation coil body and at least one longitudinally extending parallel to the excitation coil body, directly connected with the excitation coil body and used to connect the brake electromagnet The fixed slats fixed on other components of the magnetic track brake, the excitation coil body can move to maintain multiple magnetic joints, the excitation coil body is placed vertically, and a fixed slat is arranged on each side of the excitation coil body. That is, the excitation coil body is divided into an upper excitation coil and a lower excitation coil. Almost all the magnetic induction lines generated by the lower excitation coil pass through the iron core, while a considerable part of the magnetic induction lines generated by the upper excitation coil do not pass through the iron core. As a result, the upper excitation coil leaks. Magnetic flux, resulting in low braking efficiency of the entire field coil body

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