CN110672502B - Method for measuring deformation recovery capability of O-shaped sealing ring for gas insulated enclosed switch - Google Patents
Method for measuring deformation recovery capability of O-shaped sealing ring for gas insulated enclosed switch Download PDFInfo
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- CN110672502B CN110672502B CN201910916748.9A CN201910916748A CN110672502B CN 110672502 B CN110672502 B CN 110672502B CN 201910916748 A CN201910916748 A CN 201910916748A CN 110672502 B CN110672502 B CN 110672502B
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- 238000007789 sealing Methods 0.000 title claims abstract description 47
- 238000011084 recovery Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 24
- 229920001971 elastomer Polymers 0.000 claims description 6
- 230000032683 aging Effects 0.000 abstract description 4
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 229910018503 SF6 Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
- G01B15/06—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons for measuring the deformation in a solid
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a method for measuring the deformation recovery capacity of an O-shaped sealing ring for a gas insulated enclosed switch, which comprises the following steps: taking the compressed O-shaped sealing ring, and intercepting a sample to be tested on the O-shaped sealing ring; measuring the diameter of the cross section of the sample to be measured in the horizontal direction after the cross section is compressed, namely the diameter of the horizontal cross sectiond h (ii) a Measuring the diameter of the vertical section of the compressed cross section of the sample to be measuredd v (ii) a The deformation recovery capability RA of the O-ring is the ratio of the vertical cross-sectional diameter to the horizontal cross-sectional diameter. The method fills the technical blank that the residual elasticity of the GIS retired O-shaped sealing ring cannot be measured, provides a method for representing the aging degree of the retired O-shaped sealing ring, and has important significance for detecting the performance of the O-shaped sealing ring.
Description
Technical Field
The invention relates to the technical field of electrical equipment performance detection, in particular to a method for measuring the deformation recovery capacity of an O-shaped sealing ring for a gas insulated enclosed switch.
Background
Gas Insulated Switchgear (Gas Insulated Switchgear, abbreviated as GIS) is a high-voltage electrical device filled with sulfur hexafluoride Gas at a certain pressure as an insulating medium and sealed by a flange-vulcanized rubber O-ring structure. After long-time use, the O-shaped sealing ring is aged due to the action of the use environment and stress, the sealing performance of the O-shaped sealing ring is continuously degraded, the deformation degree is increased, the surface of the sealing ring is gradually hardened, the elastic performance is reduced, and the deformation recovery capability is gradually weakened until the sealing is failed.
For detecting the performance of the sealing ring, the compression permanent deformation is generally used as an aging characteristic quantity to measure the vertical section diameter d of the sealing ring before aging0Vertical diameter d after compression and recovery of sealing ring1And the diameter d of the seal ring when compressedsI.e. the depth of the groove in which the sealing ring is located.
For the actual running O-shaped sealing ring in the GIS, the groove depth (d) is long due to the long running yearss) And original diameter (d)0) It is not available.
Therefore, the method for measuring the recovery deformation capability of the O-shaped sealing ring is provided, the compression permanent deformation rate is replaced, the method is used as the aging characteristic quantity of the O-shaped sealing ring, the deformation recovery capability of the sealing ring is accurately and effectively predicted, and the method is vital to guarantee the normal operation of mechanical equipment.
Disclosure of Invention
In order to solve the existing problems and defects in the prior art, the invention provides a method for measuring the deformation recovery capacity of an O-shaped sealing ring for a gas insulated enclosed switch.
The purpose of the invention is realized by at least one of the following technical solutions.
The invention provides a method for measuring the deformation recovery capacity of an O-shaped sealing ring for a gas insulated enclosed switch, which comprises the following steps:
(1) taking the compressed O-shaped sealing ring, and intercepting a sample to be tested on the O-shaped sealing ring;
(2) measuring the diameter of the cross section of the sample to be measured in the horizontal direction after the cross section is compressed, namely the diameter d of the horizontal cross sectionh；
(3) Measuring the diameter of the cross section of the sample to be measured in the vertical direction after the cross section is compressed, namely the diameter d of the vertical sectionv；
(4) The deformation recovery capability RA of the O-shaped sealing ring is as follows:
preferably, the horizontal cross-sectional diameter and the vertical cross-sectional diameter are measured using a scanning electron microscope or a rubber thickness meter.
Preferably, the sample to be measured is arc-shaped, and the arc length of the arc-shaped sample is 8 mm-12 mm.
Preferably, the horizontal section diameter and the vertical section diameter are measured by using a rubber thickness meter, and the value on the rubber thickness meter is read after the pressure foot is released for 3-5 seconds.
Preferably, the horizontal section diameter and the vertical section diameter are measured using a scanning electron microscope, and the measuring step includes:
1) placing a sample to be tested on a scanning electron microscope placing table, wherein the cross section of the sample to be tested is upward;
2) selecting the straight line with the longest distance between two points on the cross section of the sample to be detected, namely the diameter d of the horizontal section through a scanning electron microscopeh；
3) Selecting a straight line with the shortest distance between two points on the cross section of the sample to be detected, namely the diameter d of the vertical section through a scanning electron microscopev。
Preferably, the diameter of the horizontal section is measured for 3-5 times, the maximum value of the measured value is taken, the diameter of the vertical section is measured for 3-5 times, and the minimum value of the measured value is taken.
Preferably, the diameter of the horizontal section is measured for 3-5 times, the maximum value of the measured value is taken, the diameter of the vertical section is measured for 3-5 times, and the minimum value of the measured value is taken.
Compared with the prior art, the invention has the following beneficial effects and advantages:
the method for measuring the deformation recovery capacity of the O-shaped sealing ring for the gas insulated switchgear fills the technical blank that the residual elasticity of the decommissioned GIS O-shaped sealing ring cannot be measured, provides a method for representing the aging degree of the decommissioned O-shaped sealing ring, and has important significance for detecting the performance of the O-shaped sealing ring.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a horizontal cross-section of an O-ring seal;
FIG. 2 is a schematic view of a vertical section of an O-ring;
FIG. 3 is a schematic diagram of an arc-shaped sample to be tested of an O-shaped sealing ring;
FIG. 4 is a schematic view of the compression of an O-ring seal in a GIS;
in the attached figure, 1 is an O-shaped sealing ring, 2 is a metal flange, and 3 is SF6A gas.
Detailed Description
The following further describes embodiments of the present invention in conjunction with the following examples and figures, but the practice of the present invention is not limited thereto.
Examples
The embodiment provides a method for measuring the deformation recovery capacity of an O-shaped sealing ring for a gas insulated switchgear, which comprises the following steps:
(1) as shown in fig. 4, an O-shaped sealing ring 1 is placed in a GIS to be compressed, sulfur hexafluoride gas 3 is filled in the GIS to serve as an insulating medium, a metal flange 2 is filled in the GIS, then an arc-shaped sample to be measured is cut from the compressed O-shaped sealing ring, and the arc length is 10mm, as shown in fig. 3;
(2) measuring horizontal section diameter d of arc sample to be measured by Phenom Pro type scanning electron microscopehAnd vertical cross-sectional diameter dvTo obtain the deformation recovery capability of the O-shaped sealing ring 1
Specific example dhAnd dvThe measuring steps include:
1) placing a sample to be tested on a scanning electron microscope placing table, wherein the cross section of the sample to be tested is upward;
2) selecting the straight line with the longest distance between two points on the cross section of the sample to be measured by a scanning electron microscope, measuring for 4 times as shown in figure 1, and taking the maximum value in 4 measured values, namely the diameter d of the horizontal sectionh；
3) Selecting the straight line with the shortest distance between two points on the cross section of the sample to be measured through a scanning electron microscope, measuring for 4 times as shown in figure 2, and taking the minimum value in 4 measured values, namely the diameter d of the vertical sectionv。
According to the above test method, the arc-shaped samples 1 to 20 of the ethylene propylene diene monomer seal ring aged for 10, 20, 30, 40 and 50 days at 120 ℃ and 25% Compression ratio were subjected to Compression Set (CS) and Recovery Reliability (RA) tests, and the results are shown in table 1.
TABLE 1
| |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| CS | 0.28 | 0.39 | 0.36 | 0.26 | 0.47 | 0.42 | 0.46 | 0.39 | 0.48 | 0.59 |
| RA | 0.94 | 0.91 | 0.89 | 0.93 | 0.84 | 0.86 | 0.85 | 0.88 | 0.84 | 0.79 |
| Numbering | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| CS | 0.55 | 0.58 | 0.68 | 0.63 | 0.61 | 0.60 | 0.65 | 0.64 | 0.66 | 0.68 |
| RA | 0.82 | 0.81 | 0.78 | 0.73 | 0.81 | 0.81 | 0.79 | 0.79 | 0.77 | 0.77 |
The calculated Pearson correlation value of the same sample and two measuring methods is-0.952, and the correlation is strong, so the method for measuring the deformation recovery capability provided by the invention can replace the traditional method for measuring the compression set rate.
The above-mentioned embodiments can be regarded as the preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the embodiments, and any other changes, modifications, substitutions, combinations, and simplifications that may be made without departing from the spirit and principle of the present invention are all equivalent substitutions included in the scope of the present invention.
Claims (7)
1. The method for measuring the deformation recovery capacity of the O-shaped sealing ring for the gas insulated closed switch is characterized by comprising the following steps of: (1) taking the compressed O-shaped sealing ring, and intercepting a sample to be tested on the O-shaped sealing ring;
(2) measuring the diameter of the cross section of the sample to be measured in the horizontal direction after the cross section is compressed, namely the diameter d of the horizontal cross sectionh；
(3) Measuring the diameter of the cross section of the sample to be measured in the vertical direction after the cross section is compressed, namely the diameter d of the vertical sectionv；
(4) The deformation recovery capability RA of the O-shaped sealing ring is as follows:
2. the method for measuring the deformation recovery capability of an O-shaped sealing ring for a gas insulated switchgear according to claim 1, wherein the horizontal cross-sectional diameter and the vertical cross-sectional diameter are measured using a scanning electron microscope or a rubber thickness meter.
3. The method for measuring the deformation recovery capability of the O-shaped sealing ring for the gas insulated switchgear according to claim 1, wherein the sample to be measured is arc-shaped, and the arc length of the arc-shaped sample is 8mm to 12 mm.
4. The method for measuring the deformation recovery capacity of the O-shaped sealing ring for the gas insulated switchgear according to claim 2, wherein the horizontal section diameter and the vertical section diameter are measured by using a rubber thickness meter, and the value on the rubber thickness meter is read after the pressure is released for 3-5 seconds.
5. The method for measuring the deformation recovery capacity of the O-shaped sealing ring for the gas insulated switchgear according to claim 2, wherein the horizontal section diameter and the vertical section diameter are measured by using a scanning electron microscope, and the measuring step comprises:
1) placing a sample to be tested on a scanning electron microscope placing table, wherein the cross section of the sample to be tested is upward;
2) selecting the straight line with the longest distance between two points on the cross section of the sample to be detected, namely the diameter d of the horizontal section through a scanning electron microscopeh；
3) Selecting a straight line with the shortest distance between two points on the cross section of the sample to be detected, namely the diameter d of the vertical section through a scanning electron microscopev。
6. The method for measuring the deformation recovery capacity of the O-shaped sealing ring for the gas insulated switchgear according to claim 4, wherein the diameter of the horizontal section is measured for 3-5 times, and the maximum value of the measured value is taken; and measuring the diameter of the vertical section for 3-5 times, and taking the minimum value of the measured value.
7. The method for measuring the deformation recovery capacity of the O-shaped sealing ring for the gas insulated switchgear according to claim 5, wherein the diameter of the horizontal section is measured for 3-5 times, and the maximum value of the measured value is taken; and measuring the diameter of the vertical section for 3-5 times, and taking the minimum value of the measured value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910916748.9A CN110672502B (en) | 2019-09-26 | 2019-09-26 | Method for measuring deformation recovery capability of O-shaped sealing ring for gas insulated enclosed switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910916748.9A CN110672502B (en) | 2019-09-26 | 2019-09-26 | Method for measuring deformation recovery capability of O-shaped sealing ring for gas insulated enclosed switch |
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| Publication Number | Publication Date |
|---|---|
| CN110672502A CN110672502A (en) | 2020-01-10 |
| CN110672502B true CN110672502B (en) | 2021-12-24 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426993A (en) * | 2018-03-21 | 2018-08-21 | 广东电网有限责任公司电力科学研究院 | A kind of rubber packing material selection method and system |
| CN109883686A (en) * | 2018-12-21 | 2019-06-14 | 湖北航天化学技术研究所 | A method of measurement sealing ring opening force and compression set |
| CN210859787U (en) * | 2019-08-20 | 2020-06-26 | 中国第一汽车股份有限公司 | Sealing ring and sealing element |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160040812A1 (en) * | 2014-08-07 | 2016-02-11 | Wen Sheng Fu Co., Ltd. | Quick Connector Structure for a Pipe |
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- 2019-09-26 CN CN201910916748.9A patent/CN110672502B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426993A (en) * | 2018-03-21 | 2018-08-21 | 广东电网有限责任公司电力科学研究院 | A kind of rubber packing material selection method and system |
| CN109883686A (en) * | 2018-12-21 | 2019-06-14 | 湖北航天化学技术研究所 | A method of measurement sealing ring opening force and compression set |
| CN210859787U (en) * | 2019-08-20 | 2020-06-26 | 中国第一汽车股份有限公司 | Sealing ring and sealing element |
Non-Patent Citations (2)
| Title |
|---|
| The effect of the O-ring on the end face deformation of mechanical seals based on numerical simulation;Zhi Chen 等;《TRIBOLOGY INTERNATIONAL》;20161231;第97卷(第1期);第278-287页 * |
| 橡胶O形密封圈的变形及应力分析;任全彬 等;《航空动力学报》;19950731;第10卷(第3期);第241-244页 * |
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