CN106706252A - Method for testing insulator vibration fatigue performance - Google Patents
Method for testing insulator vibration fatigue performance Download PDFInfo
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- CN106706252A CN106706252A CN201710137882.XA CN201710137882A CN106706252A CN 106706252 A CN106706252 A CN 106706252A CN 201710137882 A CN201710137882 A CN 201710137882A CN 106706252 A CN106706252 A CN 106706252A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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Abstract
The invention provides a method for testing the insulator vibration fatigue performance. The method comprises the following steps: carrying out a mechanical damage test on a to-be-tested insulator, and determining the mechanical damage value Fcon of the to-be-tested insulator according to the testing result; selecting to-be-tested insulators the same as that in the last step, carrying out a vibration fatigue test on an insulator string consisting of the to-be-tested insulators, and determining the number of vibration damage times of the to-be-tested insulators when an arbitrary insulator is damaged; and carrying out a mechanical damage test on the insulator which is not damaged in the vibration fatigue test, determining the mechanical damage value Ff of the insulator which is not damaged, and determining the residual mechanical strength of the to-be-tested insulators according to the mechanical damage value Ff of the insulator which is not damaged and the mechanical damage value Fcon of the to-be-tested insulator. The method can be used for providing a quantitative checking index of a key test parameter to insulator fatigue performance testing, and is beneficial to directly evaluating the vibration fatigue performance of insulators.
Description
Technical field
The present invention relates to insulator vibrating fatigue technical field of performance test, in particular to a kind of vibration of insulator
The method of testing of fatigue behaviour.
Background technology
At present, countries in the world direct current transportation mechanical load grade is generally 120kN, 160kN, 210kN, 300kN, in order to test
Insulator vibrating fatigue performance, generally using traditional aeolian vibration method for testing fatigue, at least carries out 30,000,000 vibrations, consumption
When it is more long, and can not really reflect the influence under chronic fatigue state to insulator mechanical property.
The Insulators on HVDC Transmission Line that China is used is generally 420kN, 550kN, with HVDC conveying capacity and
The raising of voltage class, 1250mm2The application of wire, it is desirable to which insulator carries out multi-series and parallel connection will to meet the intensity of insulator chain
Ask.To mitigate string weight, simplify gold utensil, the engineer applied to more large-tonnage insulator proposes new requirement, researches and develops 700-840kN
Large-tonnage insulator has turned into problem in the urgent need to address.700-840kN large-tonnage insulators are to research and develop first both at home and abroad, its
Long term mechanical Fatigue Vibration performance directly affects the safe and reliable and stable operation of extra high voltage direct current transmission line.
The aeolian vibration fatigue test for using at present can not really reflect the long-term of the large-tonnage insulator of 420kN and the above
Mechanical fatigue characteristic, also, the country is still without suitable large-tonnage insulator vibrating fatigue method for testing performance, also without big ton
The test result of position insulator vibrating fatigue performance；External aspect, only may for load added by insulator on power transmission sequence
The various situations of change, for example, wave, the condition, the research carried out to the fatigue behaviour of insulator changing load such as icing.But only
Testing fatigue is carried out for small tonnage insulator, the insulator to more large-tonnage does not carry out fatigue test, does not also enter
One step proposes that corresponding testing standard and Key experiments parameter etc. quantify performance assessment criteria, it is difficult to directly apply to the vibration of insulator
The assessment of fatigue behaviour.
The content of the invention
In consideration of it, the present invention proposes a kind of method of testing of insulator vibrating fatigue performance, it is intended to solve existing vibration
Fatigue test method is not suitable for the test of large-tonnage insulator fatigue behaviour and is examined without the quantization for proposing Key experiments parameter
Core index causes the problem for being difficult to connect assessment insulator vibrating fatigue performance.
On one side, the present invention proposes a kind of method of testing of insulator vibrating fatigue performance, and the method includes following
Step：First Mechanical damage test step, Mechanical damage test is carried out to insulator to be measured, and is determined according to result of the test to be measured
The mechanical damage force value F of insulatorcon；Vibration fatigue test step, selection and the insulator to be measured of identical in above-mentioned steps and right
The insulator chain of its composition carries out vibration fatigue test, when wherein any one of insulator to be measured is destroyed, it is determined that
The flutter failure number of times of the insulator to be measured；Second Mechanical damage test step, to not suffering in the vibration fatigue test
SI semi-insulation of destruction carries out Mechanical damage test, it is determined that the mechanical damage force value of SI semi-insulation being not corrupted
Ff, and according to the mechanical damage force value F of SI semi-insulation being not corruptedfWith the mechanical damage of the insulator to be measured
Force value FconDetermine the residual mechanical intensity of the insulator to be measured.
Further, in the method for testing of above-mentioned insulator vibrating fatigue performance, the first Mechanical damage test step
Also include：Record the damage -form of the insulator to be measured.
Further, it is right in the vibration fatigue test step in the method for testing of above-mentioned insulator vibrating fatigue performance
The vibration force that the insulator chain applies is axial vibration power.
Further, in the method for testing of above-mentioned insulator vibrating fatigue performance, in the vibration fatigue test step, institute
Stating axial vibration power has default waveform.
Further, in the method for testing of above-mentioned insulator vibrating fatigue performance, the predetermined waveform is sine wave.
Further, in the method for testing of above-mentioned insulator vibrating fatigue performance, to described in the vibration fatigue test
The load that insulator to be measured applies has default proportionate relationship with the rated load of the insulator to be measured.
Further, in the method for testing of above-mentioned insulator vibrating fatigue performance, the vibration fatigue test step is also wrapped
Include：Record the damage -form of the insulator destroyed in the insulator chain.
Further, in the method for testing of above-mentioned insulator vibrating fatigue performance, the second Mechanical damage test step
Also include：SI semi-insulation being not corrupted described in record is by the damage -form after Mechanical damage test.
Further, in the method for testing of above-mentioned insulator vibrating fatigue performance, in second Mechanical damage test
The residual mechanical intensity is defined as FfWith FconRatio.
Further, in the method for testing of above-mentioned insulator vibrating fatigue performance, in second Mechanical damage test step
Also include after rapid：Steep wave test procedure, enters to the remaining insulator being not corrupted in the vibration fatigue test
Row steep wave is tested, and obtains steep wave result of the test.
In the present invention, by the first Mechanical damage test step and the second Mechanical damage test step determine respectively it is to be measured
The mechanical damage force value F of insulatorconWith the mechanical damage force value F of SI semi-insulation in fatigue statef, can be treated
Survey the mechanical residual strength R of insulator；The flutter failure number of times of insulator to be measured is determined by vibration fatigue test step；So as to
The quantizing examination index of Key experiments parameter is provided for insulator fatigue property test, is conducive to directly assessing shaking for insulator
Dynamic fatigue behaviour.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the flow chart of the method for testing of insulator vibrating fatigue performance provided in an embodiment of the present invention；
Fig. 2 is the another flow chart of the method for testing of insulator vibrating fatigue performance provided in an embodiment of the present invention.
Specific embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.Conversely, there is provided these embodiments are able to be best understood from the disclosure, and can be by the scope of the present disclosure
Complete conveys to those skilled in the art.It should be noted that in the case where not conflicting, embodiment in the present invention and
Feature in embodiment can be mutually combined.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Referring to Fig. 1, the stream of the method for testing of insulator vibrating fatigue performance provided in an embodiment of the present invention is shown in figure
Cheng Tu.As illustrated, the method comprises the following steps：
First Mechanical damage test step S1, Mechanical damage test is carried out to insulator to be measured, and true according to result of the test
The mechanical damage force value F of fixed insulator to be measuredcon。
Specifically, insulator to be measured can be the large-tonnage glass insulator or porcelain insulator of different model.Specific implementation
When, glass insulator can be selected according to the condition for meeting the 5th article of GB/T 775.3 regulation, according to meeting GB/T 775.3 the 8th
The condition selection porcelain insulator that bar specifies.Can be by mechanical damage device well-known to those skilled in the art, to be measured exhausted
Edge applies mechanical damage power, until insulator to be measured is pulled off cause and damages.The data acquisition unit of mechanical damage device can be certainly
Dynamic record causes the mechanical damage power that insulator destruction moment mechanical damage device to be measured applies, i.e.,：Mechanical damage force value Fcon。
Vibration fatigue test step S2, identical insulator to be measured and the insulator constituted to it in selection and above-mentioned steps
String carries out vibration fatigue test, when wherein any one insulator to be measured is destroyed, determines that the vibration of insulator to be measured is broken
Bad number of times.
Specifically, selection constitutes insulator chain with the insulator of same model in step S1, by vibrating device to insulator
Go here and there and apply the lasting vibration force for changing, keep the force state until when thering is an insulator to be destroyed in insulator chain, trying
Test end, the number of times of the period of change of vibration force recorded by control unit in vibrating device, due to insulator chain in it is each
The type of individual insulator is identical, it is believed that the flutter failure number of times of each insulator is the same in insulator chain, therefore, it can by
The number of times of the period of change is defined as the flutter failure number of times of insulator to be measured, that is, insulator to be measured vibrating fatigue pole
Limit.
Second Mechanical damage test step S3, SI semi-insulation to being not corrupted in vibration fatigue test carries out machinery
Failure test, it is determined that the mechanical damage force value F of SI semi-insulation being not corruptedf, and it is exhausted according to the part being not corrupted
The mechanical damage force value F of edgefWith the mechanical damage force value F of insulator to be measuredconDetermine that the residual mechanical of insulator to be measured is strong
Degree.
Specifically, the insulator that will can be not corrupted in vibration fatigue test is considered as the insulation in fatigue state
Son, by a part of insulator in fatigue state according to the flow of step S1, carries out Mechanical damage test, and record should be in tired
The mechanical damage force value F of SI semi-insulation of labor statef, and can be by FfWith FconRatio be defined as the residual of insulator to be measured
Remaining mechanical strength R.During specific implementation, can choose an insulator from the insulator in fatigue state carries out mechanical damage examination
Test, determine the mechanical damage force value F of the insulatorf, by the mechanical damage force value F of the insulatorfWith insulation to be measured in step S1
The mechanical damage force value F of sonconDetermine the residual mechanical intensity R of insulator to be measured；Can also be from the insulator in fatigue state
Middle multiple insulators of choosing carry out Mechanical damage test one by one, and the mechanical damage force value of each insulator that will be obtained is averaged
Obtain Ff, then by FfWith FconRatio be defined as the residual mechanical intensity R of insulator to be measured.
During experiment, can be by the mechanical damage force value F of above-mentioned insulator to be measuredcon, insulator to be measured flutter failure time
The mechanical damage force value F of number, the SI semi-insulation being not corruptedfWith the parameter such as the residual mechanical intensity R of insulator to be measured with
The preset standard value of each parameter is compared, it is believed that when the preset standard for wherein having more than two parameters and corresponding parameter
When value is consistent, it is believed that the anti-vibration fatigue behaviour of the insulator to be measured is qualified, if for example, the large-tonnage insulator newly developed
Above-mentioned condition can be met, you can think that the large-tonnage insulator can reach the requirement of engineer applied.During specific implementation, can be with root
The criterion of acceptability of insulator to be measured is determined according to actual application environment, the present embodiment does not do any restriction to it.It should be noted that
The preset standard value of each parameter can also be selected according to actual conditions, and the present embodiment does not do any restriction to it.
As can be seen that in the present embodiment, by the first Mechanical damage test step and the second Mechanical damage test step point
The mechanical damage force value F of the insulator to be measured not determinedconWith the mechanical damage force value of SI semi-insulation in fatigue state
Ff, the mechanical residual strength R of insulator to be measured can be obtained；The vibration of insulator to be measured is determined by vibration fatigue test step
Destruction number of times；So as to provide the quantizing examination index of Key experiments parameter for insulator fatigue property test, be conducive to directly
The vibrating fatigue performance of insulator is assessed, the quantization that existing vibration fatigue test method does not propose Key experiments parameter is solved
Performance assessment criteria causes the problem for being difficult to connect assessment insulator vibrating fatigue performance.
In above-described embodiment, the first Mechanical damage test step S1 can also include recording the destruction shape of insulator to be measured
State, vibration fatigue test S2 steps can also include the damage -form of the insulator destroyed in record insulator chain, second
Mechanical damage test step S3 can also include that the SI semi-insulation that record is not corrupted is sub by broken after Mechanical damage test
Bad form.Specifically, the insulator to be measured of different model, different tonnages can be recorded in mechanical damage by mechanical damage device
The fracture of the form destroyed after experiment, such as steel foot, chapeau de fer fracture etc.；By in vibrating device record vibration fatigue test
The fracture of the damage -form of the insulator for being destroyed, such as steel foot, chapeau de fer fracture etc.；Part is recorded by mechanical damage device
Insulator in fatigue state is through the damage -form after Mechanical damage test, such as fracture of steel foot, chapeau de fer fracture etc..Can be with
Find out, by recording insulator to be measured by the damage -form after different tests, be conducive to the machinery for finding insulator to be measured strong
The weaker position of degree, and then promote the improvement and lifting of insulator product vibrating fatigue performance.
It is axial vibration power to the vibration force that insulator chain applies in vibration fatigue test step S2 in above-described embodiment.
Specifically, the direction of vibration force that insulator chain applies is consistent with the axis direction of insulator chain, for example, for big ton
Position suspension type dish-type insulator, the vibration force applied to it can be the dynamic force in direction perpendicular to the ground.During specific implementation, the axial direction
Vibration force can have default waveform.It should be noted that the predetermined waveform in the present embodiment can exist according to insulator chain
The situation of change of suffered external load determines in actual working environment, for example sine wave, triangular wave, square wave, half-sine wave, half
Triangular wave, half square wave, oblique wave or shock wave etc., the present embodiment does not do any restriction to it.
As can be seen that applying the axial vibration power with predetermined waveform by insulator chain, can simulate under various operating modes
Large-tonnage insulator Vibration Condition, so as to measure influence of the vibrating fatigue state to large-tonnage insulator mechanical performance.
Preferably, above-mentioned predetermined waveform is sine wave.Specifically, can be determined to treat according to the period of change quantity of sine wave
Survey the flutter failure number of times of insulator.During specific implementation, the frequency of sinusoidal vibration is needed according to the specific of insulator different regions
Vibration Condition determines.For example, the vibration frequency of 840kN and 420kN insulators could be arranged to 6.7Hz.Due to insulator chain
The change of the outer vibrating force being subject in actual environment tends to sine wave.Therefore, when to insulator chain applying sine wave
During the axial vibration power of form, result of the test can be closer to actual conditions.
In the various embodiments described above, the load applied to insulator to be measured in vibration fatigue test is specified with insulator to be measured
Load has default proportionate relationship.Specifically, due on circuit insulator work load no more than its rated load 30%,
Amplitude change in vibration fatigue test and the deviation of nominal load are considered simultaneously also within the specific limits, therefore, vibrate tired
The load applied to insulator to be measured in labor experiment can be the 30% ± k% (0 of insulator rated load<k<10), wherein, k
Value can be determined according to the concrete condition of insulator to be measured and vibration fatigue test, for example, for 840kN's and 420kN
Insulator, the value of k is 7.5.
As can be seen that the vibration fatigue test method, can be directed to the different oscillating loads of the insulator setting of different model,
So that result of the test is more accurate.
Referring to Fig. 2, in the various embodiments described above, also include after the second Mechanical damage test step S3：Steep wave experiment step
Rapid S4, steep wave experiment is carried out to the remaining insulator being not corrupted in vibration fatigue test, obtains steep wave result of the test.Tool
Body ground, can choose one or more insulators, respectively according to GB/T20642 from the remaining insulator in fatigue state
The amplitude method of regulation carries out steep wave experiment, so as to learn whether the remaining insulator being not corrupted can be tried by steep wave
Test.
It is insulator vibrating fatigue as can be seen that test can further detect the defect of insulator to be measured by steep wave
Characteristic provides another test parameters, can more fully assess the fatigue behaviour of insulator.
In sum, the method for testing of the insulator vibrating fatigue performance for being provided in the present embodiment, is insulator fatigability
The quantizing examination index there is provided Key experiments parameter can be tested, is conducive to directly assessing the vibrating fatigue performance of insulator.
Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention
God and scope.So, if these modifications of the invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (10)
1. a kind of method of testing of insulator vibrating fatigue performance, it is characterised in that comprise the following steps：
First Mechanical damage test step, Mechanical damage test is carried out to insulator to be measured, and is determined according to result of the test to be measured
The mechanical damage force value F of insulatorcon；
Vibration fatigue test step, the insulator chain that selection is constituted with the insulator to be measured of identical in above-mentioned steps and to it is carried out
Vibration fatigue test, when wherein any one of insulator to be measured is destroyed, determines the vibration of the insulator to be measured
Destruction number of times；
Second Mechanical damage test step, it is broken that SI semi-insulation to being not corrupted in the vibration fatigue test carries out machinery
Bad experiment, it is determined that the mechanical damage force value F of SI semi-insulation being not corruptedf, and be not corrupted according to described
The mechanical damage force value F of SI semi-insulationfWith the mechanical damage force value F of the insulator to be measuredconDetermine the insulator to be measured
Residual mechanical intensity.
2. the method for testing of insulator vibrating fatigue performance according to claim 1, it is characterised in that first machinery
Failure test step also includes：Record the damage -form of the insulator to be measured.
3. the method for testing of insulator vibrating fatigue performance according to claim 2, it is characterised in that the vibrating fatigue
It is axial vibration power to the vibration force that the insulator chain applies in test procedure.
4. the method for testing of insulator vibrating fatigue performance according to claim 3, it is characterised in that the vibrating fatigue
In test procedure, the axial vibration power has default waveform.
5. the method for testing of insulator vibrating fatigue performance according to claim 4, it is characterised in that the predetermined waveform
It is sine wave.
6. the method for testing of insulator vibrating fatigue performance according to claim 5, it is characterised in that the vibrating fatigue
There is default proportionate relationship with the rated load of the insulator to be measured to the load that the insulator to be measured applies in experiment.
7. the method for testing of insulator vibrating fatigue performance according to any one of claim 1 to 6, it is characterised in that
The vibration fatigue test step also includes：Record the damage -form of the insulator destroyed in the insulator chain.
8. the method for testing of insulator vibrating fatigue performance according to any one of claim 1 to 6, it is characterised in that
The second Mechanical damage test step also includes：SI semi-insulation being not corrupted described in record is by Mechanical damage test
Damage -form afterwards.
9. the method for testing of insulator vibrating fatigue performance according to any one of claim 1 to 6, it is characterised in that
The residual mechanical intensity in second Mechanical damage test is defined as FfWith FconRatio.
10. the method for testing of insulator vibrating fatigue performance according to any one of claim 1 to 6, it is characterised in that
Also include after the second Mechanical damage test step：Steep wave test procedure, to remaining in the vibration fatigue test
The insulator being not corrupted carries out steep wave experiment, obtains steep wave result of the test.
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| CN107367362A (en) * | 2017-06-22 | 2017-11-21 | 西安工程大学 | Composite insulator fatigue rupture detection method based on image procossing |
| CN110763416A (en) * | 2019-10-17 | 2020-02-07 | 南京电气绝缘子有限公司 | Glass insulator falling test device |
| CN114545106A (en) * | 2020-11-26 | 2022-05-27 | 国网天津市电力公司 | Composite insulator aging degree testing method |
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| Publication number | Publication date |
|---|---|
| CN106706252B (en) | 2020-06-26 |
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