Judgment model and judgment method for whole life cycle of door and window adhesive strips of rail vehicles

A full-life cycle, rail vehicle technology, applied in vehicle testing, machine/structural component testing, instruments, etc., can solve problems such as lack of testing and specific methods to determine the UV aging resistance of rubber strips, and improve operational safety. performance, improve evaluation accuracy, and prevent operational risks

Pending Publication Date: 2019-10-22
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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Problems solved by technology

Rubber strips are an important component to ensure the overall performance and operational safety of vehicles. It is particularly important to measure the anti-ultraviolet aging performance of rubber strips by a test method, and then determine the life cycle of rubber strips. However, there is a lack of testing and determination of rubber strips in industry standards. Specific methods for UV aging resistance

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  • Judgment model and judgment method for whole life cycle of door and window adhesive strips of rail vehicles

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Embodiment Construction

[0025] This test method is based on the definition of the UV index by the World Meteorological Organization and the World Health Organization. Taking the average UV rays within 15 minutes of the strongest sunlight at noon as an example, the radiation amount of UV rays reaching the ground is E 0 =100mW / m 2 , converted to UV index I 0 =4. Based on the above definition, the irradiance ratio k 0 for,

[0026] k 0 =E 0 / I 0 =25mW / m 2

[0027] Let city A's annual average UV index be I i , then within 15 minutes, the corresponding radiation dose E i yes,

[0028] E. i =k 0 *I i

[0029] Therefore, the radiation dose corresponding to the unit hour is E hi :

[0030] E. hi = 4E i

[0031] It is known that the annual average sunshine time of City A is h i Hours / days, according to the operating conditions of different lines of urban rail vehicles in A city, it is assumed that the three rubber strips are exposed to ultraviolet rays: that is, the irradiation h i1 hour / ...

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Abstract

A judgment method for the whole life cycle of door and window adhesive tapes of rail vehicles is characterized in that a judgment model adopted is Ni=Yi*EYi / E0, wherein Ni is the number of irradiationcycles of ultraviolet irradiation lamps, Yi is the assumed life cycle of adhesive tapes, EYi is the total annual radiation, and E0 is the unit cycle radiation of the ultraviolet irradiation lamps; and the number of irradiation cycles of the ultraviolet irradiation lamps is calculated by using the judgment model, accelerated aging test based on different numbers of cycles is carried out, the key performance indexes of the adhesive tapes before and after test are compared, and the maximum value Yimax of Yi is taken as the whole life cycle of the adhesive tapes. The test method can be used to make the ultraviolet irradiation in different regions and cities equivalent to the corresponding numbers of accelerated aging irradiation cycles and test and judge the ultraviolet aging resistance of adhesive tapes in different operation environments, so as to improve the evaluation accuracy of the anti-aging performance of adhesive tapes, accurately predict the whole life cycle of adhesive tapes, prevent the aging of adhesive tapes from causing operation risks and improve the operation safety of vehicles.

Description

technical field [0001] The invention relates to a judgment of the aging resistance of a door and window rubber strip, in particular to a judgment model and a judgment method of the ultraviolet aging resistance. Background technique [0002] At present, rubber strips have become one of the main sealing structures for doors and windows of rail vehicles. Rail vehicle industry standards have clear requirements and judgment standards for most performance indicators of rubber strips. For example, GB / T 27568-2011 defines the weather resistance performance testing and judgment standards of rubber strips through three indicators: hot air aging, low temperature brittleness and ozone resistance. However, with the continuous development of the urban rail transit industry, people's requirements for the prediction accuracy of the whole life cycle cost of the vehicle continue to increase, and more specific requirements are put forward for the service life of the rubber strip. [0003] Ult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01M17/007G06F17/50
CPCG01N17/004G01M17/007G06F30/20
Inventor 王玥张龙张晓明张鸿嘉
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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