Electric contact material friction arc burning loss in-situ test device and test method thereof

A technology for in-situ testing of electrical contact materials, applied to measuring devices, material analysis through electromagnetic means, and material analysis, etc., can solve the problem of inability to effectively reflect the arc energy of electrical contact materials, the inability to effectively remove the negative effects of wear debris, and the inability to conduct electricity. Arc resistance performance evaluation of contact materials and other issues to achieve the effects of avoiding burning interference, accurate safety evaluation, and good feasibility

Pending Publication Date: 2021-10-22
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot effectively reflect the arc energy generated by the electrical contact material. On the other hand, it cannot effectively remove the negative impact of wear debris on arc ablation, and cannot evaluate the arc resistance of the electrical contact material.

Method used

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  • Electric contact material friction arc burning loss in-situ test device and test method thereof
  • Electric contact material friction arc burning loss in-situ test device and test method thereof
  • Electric contact material friction arc burning loss in-situ test device and test method thereof

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preparation example Construction

[0059] In some preferred embodiments, the preparation method further includes: after the test is completed, calculating the ablation mass, and measuring the ablation depth and ablation volume.

[0060] In some preferred embodiments, the in-situ test method for triboelectric arc burning of electrical contact materials further includes: before testing, grinding and cleaning the surface of the sample to be tested;

[0061] Preferably, the cleaning agent used in the cleaning includes deionized water and absolute ethanol.

[0062] This method is not only applicable to the in-situ test of samples of this specification, but also can be used for strip and block materials of other different sizes and specifications.

[0063] The process parameters of this experiment can not only adjust the power pulse width and frequency, but also can achieve this effect by changing the friction frequency.

[0064] Among them, in some more specific implementation cases, the in-situ test device and tes...

Embodiment 1

[0071] refer to figure 1 , the embodiment of the present invention provides an in-situ test device for frictional arc burning of electrical contact materials, including a test unit 1, a data acquisition unit 2 and a data processing unit 3, wherein the data acquisition unit 2 is connected to the data processing unit 3 , the test unit 1 is electrically connected with the data acquisition unit 2, specifically, as figure 1 and 2 As shown, the test unit 1 includes an adjustable speed motor 11, a tungsten electrode 14, a sample stage 12 and a DC power supply for at least placing the sample 4 to be tested, wherein the sample stage 12 has a negative electrode contact point 121 and a DC power supply arranged from top to bottom. Damping spring 122; the tungsten electrode 14 is fixedly connected with the adjustable speed motor 11, the tungsten electrode 14 is arranged above the sample 4 to be tested, and the tungsten electrode 14 can be in contact with the sample 4 to be tested and gene...

Embodiment 2

[0075] Tested by the in-situ test device for frictional arc burning of electrical contact materials in Example 1, the sample to be tested 4 is a cast Cu-Te alloy, first cut out from the ingot with a length, width and height of 45 mm by wire electric discharge cutting ×16mm×8mm block sample, then use sandpaper to grind the surface to be tested and then polish it, then wash and dry it with deionized water and absolute ethanol in turn, weigh it and wait for the test.

[0076] The sample is clamped and fixed on the sample stage 12 and the sample to be tested is connected to the negative pole of the power supply, and the clamping tungsten electrode 14 device is connected to the positive pole of the power supply. Turn on the power, set the voltage, the voltage can be adjusted according to the actual needs, the actual needs include whether to start arc, arc energy and application environment considerations, etc. In this embodiment, the voltage is set to 10V. Turn on the power supply...

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Abstract

The invention discloses an electric contact material friction arc burning loss in-situ test device and a test method thereof, the device comprises a test unit, a data acquisition unit and a data processing unit, the data acquisition unit is connected with the data processing unit, the test unit is electrically connected with the data acquisition unit, the test unit comprises an adjustable-speed motor, a test electrode, a sample table at least used for placing a to-be-tested sample and a power supply, the test electrode is fixedly connected with the adjustable-speed motor, the test electrode is arranged above the to-be-tested sample, and the test electrode can be in contact with the to-be-tested sample to generate friction and burning loss when located at the first station. According to the in-situ testing device for the friction arc burning loss of the electric contact material, through low-voltage friction arc burning loss, the working environment of the electric contact material is more similar to that of the electric contact material under the application conditions of an electric automobile, a charging device and the like, periodic friction arc starting is achieved through the rotary swing arm, burning loss interference caused by abrasive dust can be avoided, and meanwhile, better feasibility is provided for recording and collecting real-time data.

Description

technical field [0001] The invention belongs to the technical field of electrical materials, and in particular relates to an in-situ testing device and a testing method for frictional arc burning of electrical contact materials. Background technique [0002] During the electrical contact process, when the contact interface of two conductors changes from separation to contact or from contact to separation, an arc will be generated between the two under certain conditions. The high-energy, high-temperature arc will melt and damage the surface of the contact material, deteriorate the material performance, and reduce the service life of the material. Therefore, the arc ablation process of electrical contact materials is crucial to assess the service life of electrical contact materials. [0003] The current arc ablation performance test of electrical contact materials mainly focuses on the arc ablation behavior of pressure contacts, mainly for electrical contact materials of hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00
CPCG01N27/00
Inventor 许赪郑哲帅郑必长宋振纶胡芳怡胡方勤
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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