Springback-preventing high-speed train model accelerating device based on momentum transferring

Abstract

The invention discloses a springback-preventing high-speed train model accelerating device based on momentum transferring. The train model accelerating device comprises experiment tracks and trailer tracks which are arranged in parallel and spaced for an appropriate distance to the experiment tracks, wherein the experiment tracks are used for running a train model; the trailer tracks are used for running a trailer which can drive the train model to run; the trailer is accelerated in a traction way by a piston mechanism; the piston mechanism comprises a traction rope, a pipeline, as well as a sliding piston and a traction piston which are arranged inside the pipeline; the sliding piston is provided with a through hole in the axial direction; one end of the traction rope is connected with a train, while the other end of the traction rope penetrates through the through hole of the sliding piston and is connected with the traction piston; the pipeline comprises an acceleration pipe section and a deceleration pipeline section; the acceleration pipe section is provided with an inlet for inletting compressed gas; and the start end of the deceleration pipeline section is provided with more than one gas leakage hole. The train model accelerating device is applicable for accelerating the train model with weight up to tens of kg to the speed being over 300km / h, and the shape of the train is free from any restriction.

Description

technical field [0001] The invention relates to a method of accelerating a high-speed train model with a large mass and a large size to a speed equal to or higher than the running speed of a high-speed train within a short distance by using compressed gas (air, nitrogen or other non-toxic and non-combustible gases) acceleration device. Background technique [0002] Along with the operation of high-speed trains (over 270 kilometers per hour) in the world, one of the key devices for studying the operation of high-speed trains is the high-speed train dynamic model experimental device. The main structure of this device is divided into three parts: the acceleration part of the high-speed train model, the test part of the train model and the deceleration recovery part of the train model. The acceleration part of the high-speed train model is to use a certain method to accelerate the train model to the speed required by the experiment within a certain distance; then the train mode...

AI Technical Summary

Problems solved by technology

Although this technology can accelerate the train model to a speed of more than 300 km / h, the following disadvantages prevent this acceleration technology from being applied to a train model acceleration device with a large external dimension

First, since the train model is launched from the acceleration tube, the exterior size and structural form of the train are strictly limited

When the size of the train model increases, the caliber of the launch tube increases accordingly, and the construction cost of the experimental device increases greatly

Second, because the train model needs to decelerate and recover after passing the experimental section, the train model of this structure cannot effectively decelerate and recover in the recovery deceleration section due to the limitation of the structure

Third, when the train model has a certain form of aerodynamic appearance, the isolation and sealing of the compressed gas in the accelerator tube and the train model becomes a dilemma: if the end of the train model is used to seal, the corresponding train model The aerodynamic shape is destroyed; if the piston is used for sealing, after the train model is launched, the deceleration of the piston in the acceleration section is a tricky problem

Fourth, the compressed gas from the accelerating tube will seriously interfere with the experimental test of the train model in the experimental section. Although a large concave cavity can be used to eliminate the interference of this high-pressure air flow on the experimental section, the use of the concave cavity limits the two-way split. Expansion of Train Model Experiment Work

The 5th, in this train acceleration device, pantograph model cannot be installed on the top of the train model

Thus, this acceleration technique is limited to the relatively small shape and mass of the train model, and is limited to a one-way train dynamic model experimental setup

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