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An insulation performance test device for EMU roof insulators in complex environments

A technology for roof insulation and complex environments, applied to measuring devices, testing dielectric strength, instruments, etc., can solve problems such as large deviations, flashover voltage drops, etc., achieve small deviations, stable wind speed, and ensure safe operation

Active Publication Date: 2021-02-26
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the average speed of the EMU has reached 60-80m / s, there is high-speed relative motion between the roof insulators and the air, and the running train roof insulators are in complex environments such as snowfall, smog, sandstorms, and strong ultraviolet light. All factors will cause the flashover voltage (insulation performance) of the roof insulator to decrease; therefore, the flashover voltage (insulation performance) of the roof insulator measured by the existing test method deviates greatly from the flashover voltage of the roof insulator in actual operation. Taking it as the test basis for the design, manufacture and maintenance of roof insulators, its reliability and accuracy need to be improved

Method used

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  • An insulation performance test device for EMU roof insulators in complex environments
  • An insulation performance test device for EMU roof insulators in complex environments
  • An insulation performance test device for EMU roof insulators in complex environments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Figure 1-2 It is shown that a specific embodiment of the present invention is an insulation performance test device for roof insulators of EMUs in a complex environment, which is characterized in that:

[0029] From left to right, there are four insulated and cylindrical chambers: stable chamber 20, low-speed test chamber 21, high-speed test chamber 22 and expansion chamber 23; and stable chamber 20, low-speed test chamber 21, high-speed test chamber The axes of 22 and expansion chamber 23 are on the same straight line, and the diameter ratio is 0.5:1:0.3:1; between the stable chamber 20 and the low-speed test chamber 21, between the low-speed test chamber 21 and the high-speed test chamber 22, and between the high-speed test chamber 22 and the expansion cavity 23 are connected through a trumpet-shaped connecting cavity 4;

[0030] The left side of the stable chamber 20 is connected to the nozzle of the aerosol generator 1, and the top of the stable chamber 20 is prov...

Embodiment 2

[0037] image 3 As shown, the device of this example is basically the same as the device of Embodiment 1, the difference is only: the constant temperature and humidity controller 11 is not provided in the low-speed test chamber 21 of this example, and the partition plate 15 of the left port of the low-speed test chamber 21 Change to detachable metal mesh 16, the right port does not have dividing plate 15.

[0038]The device in this example can carry out the deposition of charged pollution particles such as wind and sand on the surface of the roof insulator and the test of its influence on the insulation performance of the roof insulator. After the metal mesh 16 is removed, the insulation performance test of the roof insulator under actual complex environments such as high-speed train operation accompanied by rainfall, smog, sandstorm, strong ultraviolet rays, etc. can be carried out.

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Abstract

An insulation performance test device for EMU roof insulators in a complex environment. There are four chambers from left to right: the stable chamber, the low-speed test chamber, the high-speed test chamber and the expansion chamber, and the left side of the stable chamber and the aerosol generator The nozzles of the low-speed test chamber are connected to each other, and the upper part is provided with a funnel; there are roof insulators in the low-speed test chamber, and the upper end of the roof insulator is connected to a high-voltage power supply; the upper surface of the inner wall of the low-speed test chamber is equipped with an ultraviolet There is a glass observation window at the top; a negative pressure fan and an anemometer are installed at the right end of the expansion chamber. The test environment is close to the actual operating environment of the roof insulator, and the test results are more accurate and reliable. At the same time, it can also test and analyze the relationship between various environmental factors and the insulation performance of the roof insulator. So as to provide a more reliable and accurate test basis for the design, manufacture and maintenance of the roof insulator, and better ensure the safe operation of the train.

Description

technical field [0001] The invention relates to an insulation performance test device for an EMU roof insulator. Background technique [0002] EMU roof insulators are used as insulation devices between the roof of high-speed railway trains and catenary, and their reliability directly affects the safe operation of trains. Flashover (discharge) of roof insulators will lead to a decrease in insulation performance, and multiple flashovers will cause a sharp drop in insulation performance. Therefore, the flashover voltage of the roof insulator (the critical voltage when the roof insulator flashover occurs) can be used to characterize its insulation performance; the higher the flashover voltage, the better the insulation performance. The determination of the flashover voltage of roof insulators is of great significance to the design, manufacture and maintenance of roof insulators. [0003] Existing testing of the insulation performance of roof insulators is to apply voltages ste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
CPCG01R31/1245
Inventor 张血琴唐昕宇郭裕钧吴广宁刘凯康永强李宇王耀振张广全石超群刘毅杰邓琴
Owner SOUTHWEST JIAOTONG UNIV
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