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Supersonic-speed air broom

A supersonic and air technology, applied in track cleaning, construction, cleaning methods, etc., can solve problems such as damage to wheels and tracks, vehicles not running normally, wheel idling, etc.

Pending Publication Date: 2019-05-28
TANGSHAN BAICHUAN INTELLIGENT MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Rail vehicles generate traction and braking force by means of the rolling friction force (adhesion) between the wheels and the rails. Experimental data show that under the condition of no sundries and dryness between the wheels and rails, the wheel-rail adhesion is an ideal state. The adhesion coefficient is between 0.3 and 0.5. When there are crushed leaves or oily water between the wheels and rails (such as rainy weather), the adhesion coefficient can be reduced to about 0.1 to 0.05. After the adhesion coefficient is reduced, it is very easy for the wheels to spin , idling will seriously damage the wheels and tracks, and even make the vehicle unable to run normally. The current solution is to spray sand on the track through the special sanding device on the vehicle to restore the wheel-rail adhesion, and the adhesion coefficient will rise after sanding The magnitude can reach about 60%. Although sand spreading can improve the wheel-rail adhesion, there are many unavoidable disadvantages, which will not be repeated here. With the development of rail transit technology, objectively, a more perfect New technology to replace old sanding technology

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the Laval acceleration nozzles (9) (6 in this example) in the accelerator (1) are divided into two groups according to the interval rule, namely group 1 and group 2, which are controlled by two solenoid valves (5) Each control one group, the purpose of doing this is: when the vehicle is running at a higher speed, the two groups of Laval acceleration nozzles (9) work at the same time, and when the vehicle is running at a lower speed, the solenoid valve (5) controls The next two groups work alternately, and only one group is working at each moment, so that the two-stage adjustment of the injection power is realized, and the solenoid valve (5) is in the closed state when it is not necessary to restore the wheel-rail adhesion.

Embodiment 2

[0039] Such as figure 2 As shown, on the basis of the technical solution described above, it is also possible to connect the accelerator (1), the valve seat (2) and a proportional valve (8) through the transition pipe (3), and the proportional valve (8) is used to Adjust the inlet pressure of the accelerator (1) within a certain range to change the outlet flow rate of all the Laval accelerator nozzles (9) to achieve the purpose of adjusting the injection power, and also have the function of opening and closing. When this method is adopted, the Laval accelerating nozzle (9) works under the working condition deviated from the design most of the time, and the gas will appear in an over-expansion state, so the efficiency and effectiveness will be reduced.

[0040] Since the gas flow involved in the present invention is a compressible gas flow, the velocity, density, temperature, etc. change greatly during the gas flow process, so a thermal insulation cover (4) is set outside the ...

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Abstract

The invention relates to the technical field of rail transit, in particular to a supersonic-speed air broom, which is a special spraying assembly used in a system for spray-sweeping the rail surface by the compressed air to recover a wheel and rail adhesion force. The supersonic-speed air broom can convert the static compressed air into supersonic-speed air jet according to the design requirement,spray-sweeps the rail surface by a certain incidence angle, generates momentum (Newton force) on the rail surface to form a sweeping force, and does mechanical work on falling leaves and floating water to eliminate the falling leaves and the floating water; meanwhile, the supersonic-speed air jet does heat work on the residual water on the rail surface in a heat conduction form, the water is further evaporated to dry the rail surface, and the aim of recovering the wheel and rail adhesion force is finally fulfilled.

Description

technical field [0001] The present invention relates to the technical field of rail transit, and in particular to a supersonic air broom, a special injection component used in a system that uses compressed air to sweep the rail surface to restore wheel-rail adhesion. The supersonic air broom can The static compressed air is transformed into a supersonic air jet according to the design requirements, and sprays and sweeps the rail surface at a certain incident angle, and forms a cleaning force through the momentum (Newton force) generated on the rail surface to perform mechanical work on fallen leaves and floating water. At the same time, the supersonic air jet will heat the residual moisture on the rail surface in the form of heat conduction, so that it can further evaporate and dry the rail surface, and finally achieve the purpose of restoring the wheel-rail adhesion. Background technique [0002] Rail vehicles generate traction and braking force by means of the rolling fric...

Claims

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Application Information

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IPC IPC(8): E01H8/10
Inventor 罗银生周勇毛荣生
Owner TANGSHAN BAICHUAN INTELLIGENT MACHINE
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