Brake device of vacuum pipeline wheel rail train

Abstract

The invention discloses a brake device of a vacuum pipeline wheel rail train, which at least comprises a brake disc, a clutch a, a belt pulley a, a transmission belt, a tensioning mechanism, a belt pulley b, a speed change gear box, a clutch b, a magnetic coupling, a magnetic suspension bearing, a flywheel, a vacuum cavity and a cooling device, wherein the clutch a and the clutch b are automatically controlled by a computer; during braking, the clutch b is jointed with the magnetic coupling firstly, then the clutch a is combined with the brake disc, an axle drives the flywheel to rotate through the transmission belt and the speed change gear box, and the kinetic energy of the axle is changed to the kinetic energy of the flywheel; when the rotating speed of the flywheel reaches the maximum value, the clutch a is disconnected from the brake disc, the clutch b is disconnected from the magnetic coupling, and the flywheel still rotates at a high speed; and when the train starts, the clutch a is combined with the brake disc firstly, then the clutch b is jointed with the magnetic coupling, the kinetic energy of the flywheel is transferred to the axle through the gear box and the transmission belt, and thus the braking energy is changed to traction power.

Description

technical field [0001] The invention belongs to the technical field of braking of railway vehicles, and relates to a braking device of a vacuum pipeline wheel-rail train. Background technique [0002] For a train in an atmospheric environment, as the speed continues to increase, the interaction force between the train and the air becomes more and more intense, and the aerodynamic resistance, crosswind effect, cross-traffic effect, tunnel effect and aerodynamic noise are significantly enhanced. Taking a bullet train at a speed of 350 kilometers per hour as an example, the air resistance exceeds 90% of the total resistance of the train; due to the intensified vibration of the train in the air, the lateral and longitudinal sliding of the train on the wheel-rail is enhanced, resulting in the adhesion coefficient of the wheel-rail being reduced to that of a low-speed train about one-tenth of that of the train, which seriously affects the climbing and braking of the train; in addi...

AI Technical Summary

Problems solved by technology

[0008] Air braking is the main means of emergency braking of high-speed trains in the atmospheric environment, and disc friction braking is the most important way of air braking. The disc braking method increases with the increase of train speed and kinetic energy. The heat energy generated during braking is also greatly increased. The huge braking heat load makes the brake disc prone to thermal fatigue damage, which is mainly manifested in mechanical damage, tissue deterioration and oxidative corrosion under the simultaneous action of alternating temperature and alternating thermal stress. In severe cases, radial cracks will be formed on the friction surface of the brake disc, which will easily lead to brittle fracture of the brake disc and affect driving safety. In addition, high-temperature creep, high-temperature oxidation and frictional heat on the surface of the brake disc will cause material softening and other problems.

[0009] Although the dynamic brake has high efficiency and is widely used in conventional braking, the design of the brake device is complicated, the installation precision is high, and there are many pipelines. Braking can only be used as an alternative means and not as the ultimate means of braking

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