CN108535172B - Thermal aging test device and thermal aging test method - Google Patents
Thermal aging test device and thermal aging test method Download PDFInfo
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- CN108535172B CN108535172B CN201810266838.3A CN201810266838A CN108535172B CN 108535172 B CN108535172 B CN 108535172B CN 201810266838 A CN201810266838 A CN 201810266838A CN 108535172 B CN108535172 B CN 108535172B
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Abstract
The invention discloses a thermal aging test device and a thermal aging test method, wherein the thermal aging test device comprises: the heat dissipation device comprises a heat conduction shell with an accommodating cavity, a heat dissipation element arranged inside the heat conduction shell, a heating element arranged outside the heat conduction shell, and a controller connected with the heating element. According to the invention, the heat-radiating element is arranged in the heat-conducting shell, and the heat-conducting effect after heating by the heating element is utilized to carry out the heat aging test on the test sample in the accommodating cavity, so that the heat aging of the test sample in the actual operation process can be simulated in the specific implementation process. Specifically, the heat exchange of the test sample in the actual operation working condition is simulated through the arrangement of the heat dissipation element, namely, the heat convection between the heat and the outside world in the actual operation of the test sample is simulated to achieve the fit with the actual operation condition, so that the test data has more practical application value, and the method is effectively applied to the judgment of the aging characteristic of the test sample after the actual operation.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a thermal aging test device and a thermal aging test method.
Background
Polymer insulation materials are widely used in various power devices such as power cables, transformers, insulators, and the like. In long-term use, the internal microcosmic part of the crystalline polymer insulating material is continuously damaged by factors such as electricity, heat, force and the like, namely, the insulating material is aged, and the insulating property is reduced. Generally, the operating conditions of the crystalline polymer are not constant but vary with the operating load of the plant. Most of the traditional aging tests are artificially set aging conditions and do not accord with the actual operation condition of the crystalline polymer insulating material, so a large number of research results prove that the application value of the traditional aging test data is not high and the traditional aging test data cannot be effectively applied to the judgment of the aging characteristic of the insulating material after actual operation.
Disclosure of Invention
Based on the above, the invention provides a thermal aging test device and a thermal aging test method, aiming at overcoming the defects that the application value of aging test data in the prior art is not high and the aging test data cannot be effectively applied to the judgment of the aging characteristic of the insulation material after actual operation.
The technical scheme is as follows:
a thermal aging test apparatus comprising: the heat dissipation device comprises a heat conduction shell with an accommodating cavity, a heat dissipation element arranged inside the heat conduction shell, a heating element arranged outside the heat conduction shell, and a controller connected with the heating element.
This technical scheme is through the inside radiating element that sets up of heat conduction casing to through the effect of heating element heating back heat conduction, carry out the thermal ageing test to the test sample of placing in holding the chamber, at concrete realization in-process, can simulate the thermal ageing of test sample actual operation in-process. Specifically, the heat exchange of the test sample in the actual operation working condition is simulated through the arrangement of the heat dissipation element, namely, the heat convection between the heat and the outside world in the actual operation of the test sample is simulated to achieve the fit with the actual operation condition, so that the test data has more practical application value, and the method is effectively applied to the judgment of the aging characteristic of the test sample after the actual operation.
Further, the number of the heat dissipation elements is at least two.
Further, the heat dissipation elements are heat dissipation fins, and at least two of the heat dissipation fins have at least two different sizes.
Furthermore, the heating element is at least two electric heating plates, and the electric heating plates are uniformly distributed on the outer wall of the heat conduction shell.
Further, the heat conducting shell is connected with a grounding wire.
Further, still including locating the first temperature sensor in the holding chamber of heat conduction casing, first temperature sensor with the controller is connected.
Further, the heat conducting shell is a closed metal shell.
Further, still including locating the second temperature sensor of the intracavity is held to the heat conduction casing and locating the outside temperature monitor of heat conduction casing, temperature monitor with the second temperature sensor is connected.
Further, still include locate heat conduction casing and the outside protective housing of heating element, the protective housing is connected with the earth connection.
The technical scheme also provides a thermal aging test method, which comprises the following steps:
determining a temperature rising curve and a temperature reducing curve of a test sample in actual operation under the condition that the actual temperature of the test sample in operation is different from the external temperature;
arranging heat dissipation elements in an accommodating cavity of a heat conduction shell, and determining the number and the size of the heat dissipation elements, so that a temperature rise curve and a temperature reduction curve in the accommodating cavity are consistent with those of a test sample in actual operation under the condition that the actual temperature in the accommodating cavity is different from the external temperature;
determining the test temperature according to the temperature of the test sample when the test sample runs at different loads in actual running;
placing a test sample into the accommodating cavity, setting a test temperature, and heating the heat-conducting shell through a heating element to enable the temperature in the accommodating cavity to be consistent with the test temperature;
and controlling the on-off of the heating element through the controller according to the test requirements to perform a periodic aging test.
According to the technical scheme, the heat dissipation elements with different quantities and/or sizes are arranged on the inner wall of the heat conduction shell to simulate the convection condition of heat and the outside world of a test sample in actual operation, the actual operation environment of the test sample is periodically simulated by setting the test temperature, and the aging characteristic of the test sample is judged. And carrying out performance test on the test sample by periodic sampling, and establishing the relation between the performance parameter change and the aging time and temperature to obtain test data with practical guiding significance.
Drawings
Fig. 1 is a schematic structural diagram of a thermal aging test apparatus according to an embodiment of the present invention.
Description of reference numerals:
10. a thermally conductive housing; 11. an accommodating chamber; 20. a heat dissipating element; 30. a heating element; 40. a controller; 50. a first temperature sensor; 60. a second temperature sensor; 70. a temperature display; 80. a protective shell.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
A thermal aging test apparatus as shown in fig. 1, comprising: the heat-conducting shell comprises a heat-conducting shell 10 with a containing cavity 11, a heat-radiating element 20 arranged inside the heat-conducting shell 10, a heating element 30 arranged outside the heat-conducting shell 10, and a controller 40 connected with the heating element 30.
In the embodiment, the heat dissipation element 20 is arranged in the heat conduction shell 10, and the heat conduction effect of the heat conduction shell 10 after being heated by the heating element 30 is used for performing a heat aging test on the test sample placed in the accommodating cavity 11, so that in a specific implementation process, the heat aging of the test sample in an actual operation process can be simulated. Specifically, the heat exchange of the test sample in the actual operation condition is simulated through the arrangement of the heat dissipation element 20, that is, the heat convection between the heat and the outside world in the actual operation of the test sample is simulated to achieve the fitting actual operation condition, so that the test data has more practical application value, and the method is effectively applied to the judgment of the aging characteristic of the test sample after the actual operation. In addition, the heat conducting shell 10 can conduct heat of the heating element 30, and can also isolate the heating element 30 from the heat dissipation element 20, so as to avoid the phenomenon that the heating element 30 is too high to exceed the melting point of the heat dissipation element 20, which leads to the melting of the heat dissipation element 20. The test sample of the embodiment is the polymer insulating material to be detected.
The number of the heat dissipating elements 20 in the present embodiment is at least two. Since the thermal aging test apparatus of the present embodiment needs to test different test samples, the number of the heat dissipation elements 20 disposed in the heat conduction housing 11 can be set according to the different test samples, so that the heat dissipation elements 20 can simulate the heat exchange degree of the test samples in actual operation.
In order to facilitate the arrangement of the heat dissipation element 20, the heat dissipation element 20 is provided with at least two fins, the fins are attached to the inner wall of the heat conduction shell 10 to achieve a heat exchange effect, and when the number of the fins is large, the fins can be arranged in a circle-by-circle manner.
In addition, at least two cooling fins have at least two different sizes, namely the sizes of the length, the width and/or the thickness of the cooling fins are various and can be selected according to specific needs, so that the heat exchange simulation precision of the cooling fins is higher.
Similarly, in order to facilitate the setting of the heating element 30, the heating element 30 is an electrical heating sheet, and the heating effect is realized by attaching the electrical heating sheet to the outer wall of the heat-conducting shell 10, and the heat is transferred to the accommodating cavity 11 through the heat conduction function of the heat-conducting shell 10. At least two electric heating plates are uniformly distributed on the outer wall of the heat-conducting shell 10. Because the metal has good thermal conductivity, the heat conducting shell 10 of the embodiment is a closed metal shell, and the closed shell is helpful for simulating heat exchange and avoids interference of excessive external factors. And the heat conduction shell 10 of this embodiment is the confined hexahedron, the quantity of electrical heating piece is six, six the electrical heating piece evenly sets up in the central point of every face of heat conduction shell 10 and puts, guarantees that the test sample is heated evenly.
The heat conducting shell 10 is connected with a ground wire, so that the heat conducting shell 10 is prevented from being electrified to endanger personal and equipment safety.
The embodiment further comprises a first temperature sensor 50 arranged in the accommodating cavity 11 of the heat conducting shell 10, the first temperature sensor 50 is connected with the controller 40, and the first temperature sensor 50 is used for measuring the temperature in the accommodating cavity 11 and feeding back the temperature to the controller 40, so that the controller 40 controls the on-off of the heating element 30 according to the fed-back temperature data, and the temperature in the accommodating cavity 11 is ensured to be consistent with the set test temperature.
Further, the present embodiment further includes a second temperature sensor 60 disposed in the accommodating cavity 11 of the heat conducting casing 10 and a temperature display 70 disposed outside the heat conducting casing 10, wherein the temperature display 70 is connected to the second temperature sensor 60. The temperature display 70 ensures that the tester can know the temperature inside the accommodating cavity 11 in real time, and is matched with the first temperature sensor 50 and the controller 40 together to ensure the accuracy of the test temperature. In addition, in the present embodiment, the first temperature sensor 50 and the second temperature sensor 60 are disposed at different positions in the accommodating chamber 11, so that the temperatures measured by the first temperature sensor 50 and the second temperature sensor 60 are the temperatures at different positions in the accommodating chamber 11, and the temperatures are monitored by the two temperature sensors together, so that whether a part of the heating element 30 is faulty or not can be determined, or whether a certain temperature sensor is faulty or not can be determined.
Further, the heating device further includes a protective shell 80 disposed outside the heat conducting shell 10 and the heating element 30, in this embodiment, the protective shell 80 is a metal protective shell, and the protective shell 80 is connected to a ground line. Considering the follow-up electric-thermal combined aging, after the electric aging device is added in the test, the protective shell 80 of the embodiment is matched with the grounding wire together to play a role in protecting the thermal aging test device.
The embodiment also provides a thermal aging test method, which comprises the following steps:
determining a temperature rising curve and a temperature reducing curve of a test sample in actual operation under the condition that the actual temperature of the test sample in operation is different from the external temperature; the difference between the actual temperature at which the apparatus and device in which the test sample is located operates and the outside ambient temperature, such as the rise and fall of the ambient temperature and the temperature inside the cable insulation during the actual operation of the cable, is determined, thereby providing a basis for the selection of the subsequent heat-dissipating elements 20.
Set up heat radiating element 20 in the chamber 11 that holds of heat conduction casing 10 to confirm heat radiating element 20's quantity and size, make under the actual temperature in the chamber 11 and the ambient temperature condition that has the difference, the curve of rising temperature and the curve of cooling in the chamber 11 of holding are unanimous with the curve of rising temperature and the curve of cooling in the test sample actual motion, thereby guarantee to set up the curve of rising temperature and the curve of cooling in the chamber 11 of holding and the actual running conditions of test sample unanimous, even make the temperature change process in the thermal ageing process of test sample the same with the situation of its actual running or be close.
Determining the test temperature according to the temperature of the test sample when the test sample runs at different loads in actual running; because the aging mechanism and the internal crystal structure of the test sample are different under the conditions of different temperature values and temperature change rates, the selection of the test temperature value and the temperature change rate is required to be in accordance with the actual conditions of the test sample as much as possible. The temperature of the test sample comprises a low temperature value, a high temperature value and a rated temperature when different loads run in actual operation; wherein the low temperature value is the temperature of a test sample when the equipment runs at low load, and the low temperature value is lower than the maximum temperature of the equipment where the test sample runs for a long time; the high temperature value is the temperature of a test sample when the equipment runs under high load or overload, and the high temperature value exceeds the temperature of the equipment running for a long time; the rated temperature is the temperature of the device during rated load operation, i.e. the temperature of the device during long-term operation.
Placing a test sample into the accommodating cavity 11, setting a test temperature, and heating the heat conduction shell 10 through the heating element 30, so that the temperature in the accommodating cavity 11 is consistent with the test temperature, and the temperature change rate of the accommodating cavity is ensured to be consistent with the temperature change rate of the test sample in actual operation;
and controlling the on-off of the heating element 30 through the controller 40 according to the test requirement, and carrying out a periodic aging test. A time control button may be provided on the controller 40 to perform a periodic thermal aging test on the test specimen to simulate the temperature difference between the peak load and the valley load during the actual operation of the test specimen.
And (3) after the test sample is subjected to thermal ageing for a period of time, taking out the test sample to perform the strategy of various performance parameters, wherein the change of the parameters finally reflects the ageing of the test sample. In the whole heat aging research stage, samples are periodically taken to carry out performance test on test samples, and the relationship between the change of performance parameters and aging time and temperature is established.
According to the technical scheme, the heat dissipation elements 20 with different quantities and/or different sizes are arranged on the inner wall of the heat conduction shell 10 to simulate the convection condition of heat and the outside world of a test sample in actual operation, the actual operation environment of the test sample is periodically simulated by setting the test temperature, and the aging characteristic of the test sample is judged. And carrying out performance test on the test sample by periodic sampling, and establishing the relation between the performance parameter change and the aging time and temperature to obtain test data with practical guiding significance.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
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| CN109297893B (en) * | 2018-10-26 | 2021-03-12 | 竹田（无锡）汽配制造有限公司 | Accelerated thermal aging test device for automobile part inspection |
| CN111721642A (en) * | 2020-06-22 | 2020-09-29 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Temperature acceleration test system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4957012A (en) * | 1989-06-16 | 1990-09-18 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Predictive aging of polymers |
| CN100343969C (en) * | 2005-03-29 | 2007-10-17 | 华为技术有限公司 | Single plate temperature circulation aging device and its aging method |
| US8154493B2 (en) * | 2006-06-02 | 2012-04-10 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device, driving method of the same, and electronic device using the same |
| CN101308129A (en) * | 2007-05-14 | 2008-11-19 | 四川大学 | Simulation vulcanization method and device for rubber tire |
| CN101121200B (en) * | 2007-09-25 | 2011-01-19 | 江苏兴利来特钢有限公司 | Automatic observing and controlling method for roasting heat accumulating type steel ladle and the device using the method |
| CN101660728A (en) * | 2009-09-07 | 2010-03-03 | 南京汉德森科技股份有限公司 | Heat-radiating substrate for alternating current LED light source |
| CN101968521A (en) * | 2010-08-31 | 2011-02-09 | 国网电力科学研究院 | Thermal stability test heating method for electric appliance and special oven thereof |
| DE102012008226A1 (en) * | 2012-04-25 | 2012-11-15 | Daimler Ag | Testing apparatus for simulating chemically, thermally and mechanically induced ageing processes in test object i.e. plastic component, of valve, has pressurization device arranged in circulation circuit for pressurization of test medium |
| KR20140107939A (en) * | 2013-02-28 | 2014-09-05 | 주식회사 미래와도전 | Electrolytes |
| FR3012218B1 (en) * | 2013-10-17 | 2015-12-04 | Aircelle Sa | METHOD FOR EVALUATING THE DAMAGE OF A COMPOSITE MATERIAL COATED WITH A PAINT MEASURING ON THE SPECTROGRAM TWO DISTINCT CRITERIA |
| US9733201B2 (en) * | 2013-11-15 | 2017-08-15 | Pentair Thermal Management Llc | Thermal age tracking system and method |
| CN104458552A (en) * | 2014-12-11 | 2015-03-25 | 国家电网公司 | Method for testing and evaluating high-low temperature circulating ageing of silicone rubber for composite insulator |
| CN205404299U (en) * | 2016-03-23 | 2016-07-27 | 四川大学 | Can simulate test piece mechanical properties's under freeze thawing temperature load proof box and device |
| JP6612675B2 (en) * | 2016-05-16 | 2019-11-27 | 日本アビオニクス株式会社 | Building exterior wall diagnostic aptitude determination device |
| CN106098275B (en) * | 2016-07-18 | 2019-01-22 | 广州供电局有限公司 | cable protective layer protector and its adjusting method |
| CN106499385B (en) * | 2016-12-15 | 2017-09-29 | 中国石油大学(北京) | Device and method for evaluating fracture environment setting of casing integrality |
| CN107664652A (en) * | 2017-08-01 | 2018-02-06 | 哈尔滨哈普电气技术有限责任公司 | A kind of dynamic aging tester device and method of work |
| CN107655924A (en) * | 2017-08-11 | 2018-02-02 | 合肥卓立雅工程材料科技有限公司 | A kind of film thermal aging test device |
| CN207123525U (en) * | 2017-09-19 | 2018-03-20 | 东莞市爱佩试验设备有限公司 | Novel steam ageing oven |
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