CN107894555B - Method for testing insulating property of heating assembly - Google Patents
Method for testing insulating property of heating assembly Download PDFInfo
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- CN107894555B CN107894555B CN201711118293.3A CN201711118293A CN107894555B CN 107894555 B CN107894555 B CN 107894555B CN 201711118293 A CN201711118293 A CN 201711118293A CN 107894555 B CN107894555 B CN 107894555B
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- heating assembly
- testing
- conductive rubber
- vacuum bag
- heating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to an aviation electrical test technology, and particularly relates to a method for testing the insulation performance of a heating assembly. The testing technology comprises conductive rubber, a vacuumizing device, a vacuum bag, an insulation resistance tester and a plurality of conducting wires. Covering the position of the heating assembly to be measured with conductive rubber, leading out the conductive rubber and the binding post of the heating element by using a lead, vacuumizing to ensure that the conductive rubber is attached to the testing surface of the heating assembly, and measuring by using equipment. The invention has the advantages of convenient use, safety and reliability, can be used for detecting the irregular molded surface of the heating assembly, and has greater economic value.
Description
The technical field is as follows: the invention belongs to the aviation electrical control technology, and particularly relates to a method for testing the insulation performance of a heating assembly.
Background art: the surface (heating surface) of the heating component is generally made of nonmetal materials such as sealant (or rubber) and is used after being bonded with a metal skin or a clad iron; generally, a probe of an insulation resistance tester is used for clamping a specified position for measurement, when a certain point on the surface of a heating component is low in insulation, the probe is difficult to detect by using a probe testing means, the specific position of the low point in insulation is difficult to detect, and an assembly is easy to rework or scrap due to unqualified insulation performance after a metal skin or a clad iron is bonded. If the method for directly detecting the insulation resistance of the surface (non-metal) surface of the heating assembly is adopted, the larger loss caused by the fact that a fault part is transferred to the next procedure can be avoided, and the fault position can be positioned after the heating assembly is manufactured and formed for repair.
The invention content is as follows:
the purpose of the invention is as follows: a safe, reliable and efficient heating assembly insulation performance testing method is provided.
The technical scheme is as follows: a method for testing the insulation performance of a heating assembly, comprising the steps of:
the method comprises the following steps: placing the heating assembly on the conductive rubber, and moving the testing surface of the heating assembly into a vacuum bag after the testing surface of the heating assembly is attached to the conductive rubber;
step two: leading out the vacuum bag by the conducting rubber and a heating element binding post in the heating assembly respectively through conducting wires;
step three: vacuumizing the vacuum bag by using a vacuumizing device until a vacuum meter pointer on the vacuumizing device is between 0.01MPa and 0.06MPa, and tightly attaching the test surface of the heating assembly and the conductive rubber;
step four: connecting the lead-out wire to an insulation resistance tester to judge the insulation performance;
step five: if the insulation resistance is larger than or equal to a specified value, the performance of the test surface of the heating assembly meets the requirement, and the test is finished; otherwise, the requirement is not met, and the step six is carried out;
step six: and opening a vacuum bag, marking the transverse position and the longitudinal position of the heating assembly to form a plurality of test areas, moving the heating assembly to enable the heating assembly and the conductive rubber to generate relative movement, changing the test areas, testing the heating assembly according to the first step to the fifth step, and adopting a gradual approximation mode until a fault area is found.
Preferably, the prescribed value in step five is 20M Ω.
Preferably, after the testing surface of the heating assembly is attached to the conductive rubber in the first step, the lining plate is placed below the conductive rubber, and then the heating assembly is moved into the vacuum bag.
Has the advantages that: according to the method for testing the insulating property of the heating assembly, if the insulation resistance of a certain point on the surface (heating surface) of the heating assembly is low, a probe (chuck) of an insulation resistance tester is difficult to find out, the point of the heating assembly is converted into the surface with the low insulation resistance by using the conductive rubber, and the probe of the insulation resistance tester is convenient to measure after being led out by using a lead. The invention has the advantages of simple structure, easy operation, safety, reliability and convenient maintenance, and the used equipment is industrial general equipment which is used for the insulation test of the heating assembly and has larger practical application value.
Description of the drawings:
FIG. 1 heating element placed on conductive rubber
FIG. 2 heating element configuration
FIG. 3 enlarged view of typical defects of heating assembly
FIG. 4 is a schematic view of the shape of the conductive rubber
The specific implementation mode is as follows: the present invention will be described in further detail with reference to the accompanying drawings and examples. As shown in fig. 1 to 4, a method for testing the insulation performance of a heating assembly includes the following steps:
1. placing the heating assembly on conductive rubber (the Shore hardness of the conductive rubber is less than or equal to 40, and the thickness of the conductive rubber is less than or equal to 1.5mm) to enable the testing surface of the heating assembly to be attached to the conductive rubber; placing a lining plate on a vacuum bag, and placing a heating component and conductive rubber on the lining plate;
2. leading out the vacuum bag by the conducting rubber and a heating element binding post in the heating assembly respectively through conducting wires; ,
3. sealing the vacuum bag by using a sealing strip and vacuumizing the vacuum bag by using a vacuumizing device until a vacuum meter pointer on the vacuumizing device is between 0.01MPa and 0.06MPa, wherein the conductive rubber is tightly attached to the flat part of the testing surface of the heating assembly, and the uneven part on the testing surface of the heating assembly is covered with the conductive rubber according to the shape of the uneven part;
4. leading out a lead of a binding post of the heating element and a lead of conductive rubber into an insulation resistance tester, and judging the insulation performance: if the insulation resistance tester measures that the insulation resistance is more than or equal to 20M omega (or other specified values), the insulation performance of the test surface of the heating assembly meets the requirement, and the test is finished; if the insulation resistance tester measures that the insulation resistance is less than 20M omega (or other specified values), the insulation performance of the testing surface of the heating assembly does not meet the requirement; stopping the vacuum pumping device and opening a vacuum bag;
5. marking the transverse position and the longitudinal position of the heating assembly testing surface, and dividing the heating assembly testing surface into a plurality of areas; checking according to the area;
6. moving the heating assembly according to the mark to change the position of the heating assembly and the conductive rubber, placing a new testing area of the heating assembly on the conductive rubber, and testing the heating assembly according to the first step to the fifth step; and (4) adopting an elimination method, and using a successive approximation mode until an area with low insulation resistance is found, and accurately positioning the position of the probe.
According to the method for testing the insulating property of the heating assembly, if the insulation resistance of a certain point on the surface (heating surface) of the heating assembly is low, a probe (chuck) of an insulation resistance tester is difficult to find out, the point of the heating assembly is converted into the surface with the low insulation resistance by using the conductive rubber, and the probe of the insulation resistance tester is convenient to measure after being led out by using a lead. The invention has the advantages of simple structure, easy operation, safety, reliability and convenient maintenance, and the used equipment is industrial general equipment which is used for the insulation test of the heating assembly and has larger practical application value.
Claims (3)
1. A method for testing the insulation performance of a heating assembly is characterized by comprising the following steps:
the method comprises the following steps: placing the heating assembly on the conductive rubber, and moving the testing surface of the heating assembly into a vacuum bag after the testing surface of the heating assembly is attached to the conductive rubber;
step two: leading out the vacuum bag by the conducting rubber and a heating element binding post in the heating assembly respectively through conducting wires;
step three: vacuumizing the vacuum bag by using a vacuumizing device until a vacuum meter pointer on the vacuumizing device is between 0.01MPa and 0.06MPa, and tightly attaching the test surface of the heating assembly and the conductive rubber;
step four: connecting the lead-out wire to an insulation resistance tester to judge the insulation performance;
step five: if the insulation resistance is larger than or equal to a specified value, the performance of the test surface of the heating assembly meets the requirement, and the test is finished; otherwise, the requirement is not met, and the step six is carried out;
step six: and opening a vacuum bag, marking the transverse position and the longitudinal position of the heating assembly to form a plurality of test areas, moving the heating assembly to enable the heating assembly and the conductive rubber to move relatively, changing the test areas, testing the heating assembly according to the first step to the fifth step, and adopting a successive approximation mode until an area with low insulation resistance is found.
2. The method for testing the insulation performance of the heating assembly according to claim 1, wherein the specified value in the fifth step is 20M Ω.
3. The method for testing the insulation performance of the heating assembly according to claim 1, wherein after the testing surface of the heating assembly is attached to the conductive rubber in the first step, the lining plate is placed below the conductive rubber, and then the heating assembly is moved into the vacuum bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711118293.3A CN107894555B (en) | 2017-11-08 | 2017-11-08 | Method for testing insulating property of heating assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711118293.3A CN107894555B (en) | 2017-11-08 | 2017-11-08 | Method for testing insulating property of heating assembly |
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| Publication Number | Publication Date |
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| CN107894555A CN107894555A (en) | 2018-04-10 |
| CN107894555B true CN107894555B (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711118293.3A Active CN107894555B (en) | 2017-11-08 | 2017-11-08 | Method for testing insulating property of heating assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109324230B (en) * | 2018-12-07 | 2020-10-13 | 陕西庆华汽车安全系统有限公司 | Detection device and detection method for insulation resistance of electric initiating explosive device |
| CN111366821B (en) * | 2020-03-30 | 2020-12-29 | 中国空气动力研究与发展中心超高速空气动力研究所 | Automatic insulation testing device and method for chip type arc heater |
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| JP4588941B2 (en) * | 2001-08-10 | 2010-12-01 | 日置電機株式会社 | Resistance measuring device and circuit board inspection device |
| JP2007178218A (en) * | 2005-12-27 | 2007-07-12 | Mitsubishi Electric Corp | Thermal resistance measuring instrument |
| CN203216995U (en) * | 2013-03-05 | 2013-09-25 | 上海富士施乐有限公司 | Auxiliary device for measuring paper electrical impedance |
| CN104034965B (en) * | 2014-05-27 | 2018-07-31 | 上海富士施乐有限公司 | A kind of measuring device and method of paper capacitance-resistance characteristic |
| CN106645954B (en) * | 2015-11-03 | 2019-02-01 | 沈阳拓荆科技有限公司 | Heating dish impedance measurement tooling and measurement method |
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