CN109060553A - A kind of through-flow bending creep testing device suitable for electrician's busbar - Google Patents
A kind of through-flow bending creep testing device suitable for electrician's busbar Download PDFInfo
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- CN109060553A CN109060553A CN201810679922.8A CN201810679922A CN109060553A CN 109060553 A CN109060553 A CN 109060553A CN 201810679922 A CN201810679922 A CN 201810679922A CN 109060553 A CN109060553 A CN 109060553A
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- 238000012360 testing method Methods 0.000 title claims abstract description 77
- 238000005452 bending Methods 0.000 title claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 230000006835 compression Effects 0.000 claims abstract description 26
- 238000007906 compression Methods 0.000 claims abstract description 26
- 238000006073 displacement reaction Methods 0.000 claims abstract description 18
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000004088 simulation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 238000011068 loading method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000013001 point bending Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012546 transfer Methods 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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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Abstract
The present invention proposes a kind of through-flow bending creep testing device suitable for electrician's busbar, including braced frame, driving mechanism, compression bar, hot environment case, test specimen fixed mechanism, test specimen monitors control mechanism, braced frame is by pedestal, column and crossbeam composition, driving mechanism is set on crossbeam top surface, test specimen fixed mechanism includes upper fixture and lower fixture, compression bar top is connected with driving mechanism, bottom end passes through crossbeam center and is connected with upper fixture, hot environment case is set to base top center, test specimen is set in hot environment case by lower fixture level, it includes computer that test specimen, which monitors control mechanism, load sensor, displacement sensor and temperature sensor, real-time display load on computer, electric current, temperature, displacement deformation trial curve.Structure of the invention design rationally, is capable of the actual operating mode of simulation creep test specimen to greatest extent.
Description
Technical field
The invention belongs to the technical fields of the mechanics properties testing of electrician's busbar, more particularly to one kind to be suitable for electrician's busbar
Through-flow bending creep testing device.
Background technique
Electrician's busbar be the electrical equipments such as high and low voltage electrical equipment, controller switching equipment, switch contact and bus duct and electrification plating,
The main media of electric energy is transmitted in the super-large currents equipment such as metal smelt.In the operating condition, it needs in busbar by biggish
Electric current causes lap-joint that creep easily occurs under the action of thermal expansion and compression to generate temperature rise.When these effect relaxations
After can cause lap-joint relaxation, and then increase contact resistance, even result in the serious consequence of joint fails.So for electrician mother
For row, the creep under through-flow and hot conditions is an important factor for limiting its structural reliability.But traditional creep test
Device can not carry out creep test of electrician's busbar under the conditions of through-flow, therefore, simulate electricity using through-flow creep test device
Creep behaviour of the work busbar in actual condition is beneficial to improvement and popularization in relation to busbar material.
In creep test, traditional pulling method is most widely used method.In view of electrician's busbar is in actual condition
The often compression being subject to, pulling method is unable to satisfy this condition, and three-point bending method can produce compression, and can pass through
Bending creep test data directly seek the uniaxial croop property of material, such as Norton constitutive equation parameter and creep limit
Deng so three-point bending method is a kind of reasonable method of comparison.
Summary of the invention
The technical problem to be solved by the invention is to solve the above problems providing a kind of suitable for electrician's busbar
Through-flow bending creep testing device, can either simulate the actual operating mode of busbar, analyze the through-flow shadow to its creep behaviour
It rings, and accurate test data can be obtained.
The technical proposal adopted by the invention to solve the above technical problems is that: a kind of through-flow bending suitable for electrician's busbar
Creep test device, which is characterized in that including braced frame, driving mechanism, compression bar, hot environment case, test specimen, the fixed machine of test specimen
Structure, test specimen monitor control mechanism, and the braced frame is made of pedestal, column and crossbeam, and the driving mechanism is set to crossbeam top
On face, the test specimen fixed mechanism includes upper fixture and lower fixture, and the compression bar top is connected with driving mechanism, and bottom end passes through cross
Beam center is connected with upper fixture, and the hot environment case is set to base top center, and the test specimen is set to by lower fixture level
In hot environment case, the test specimen monitoring control mechanism includes computer, load sensor and displacement sensor, and the load passes
Sensor is set to compression bar and is connected by cable with computer with the junction of upper fixture, and institute's displacement sensors are set in test specimen bottom surface
The heart is connected by cable with computer, and hot environment case is connected by cable with computer, and test specimen fixed mechanism is led by through-flow
Line is connected with power supply box, and the power supply box is connected by cable with computer.
According to the above scheme, the driving mechanism includes motor, retarder, turbine and worm and ball-screw, motor output end
Be connected with retarder input terminal, retarder output end is connected with worm screw, and worm screw engages with turbine, the lead screw of the ball-screw with
Worm gear is connected, and the compression bar top is connected with the nut of ball-screw.
According to the above scheme, the upper fixture includes upper fixture head and upper fixture column, the lower fixture include lower clamp head and
Lower press post, upper and lower press post are connect with the bottom thread of upper and lower clamp head respectively, and lower press post is fixed on the pedestal,
Lower clamp head is connected by screw with test specimen two ends, and upper fixture head is abutted against with test specimen end face center, upper fixture column and the pressure
Bar bottom end is connected.
According to the above scheme, the load sensor is spoke type load sensor, the compression bar bottom end and load sensor
Centre bore be spirally connected, upper fixture column is spirally connected by screw and the connecting hole on load sensor circumferential surface.
According to the above scheme, the upper fixture head and lower press post are ceramic material, and the through-flow conducting wire passes through the bottom
Seat and lower press post are connected with lower clamp head.
According to the above scheme, it is arc-shaped cone structure that the upper and lower clamp head, which is top,.
According to the above scheme, institute's displacement sensors are LVDT displacement sensor.
The beneficial effects of the present invention are: providing a kind of through-flow bending creep testing device suitable for electrician's busbar, will carry
G system, temp measuring system, through-flow system and displacement measurement system are combined together, can be to sample heated, through-flow
Bending creep test is carried out under state, is adopted the automatic loading method computerizedd control, is passed through load sensor and LVDT
(Linear Variable Differential Transformer) displacement sensor, data are accurate, high reliablity, behaviour
Make simple, temperature environment needed for providing test by hot environment case, and accurate temperature value can be obtained, by computer program control
The current value of power supply box processed output, value dynamic is adjustable, and can apply a variety of current waveforms, can to greatest extent simulation it is compacted
Become the actual operating mode of test specimen, it is bent to draw test for the information such as the available load of computer system, temperature, electric current, deformation
Line has the functions such as fault diagnosis, alarm.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of the invention；
Wherein: 1- motor；2- retarder；3- worm and gear；4- crossbeam；5- column；6- hot environment case；7-1- screw；
Clamp head under 7-2-；Press post under 7-3-；8- pedestal；9- is through-flow conducting wire；10- compression bar；11- load sensor；12-1- upper fixture
Column；12-2- upper fixture head；13-LVDT displacement sensor；14- computer；15- power supply box；16- test specimen.
Specific embodiment
For a better understanding of the invention, the invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of through-flow bending creep testing device suitable for electrician's busbar, including braced frame, driving
Mechanism, compression bar 10, hot environment case 6, test specimen 16, test specimen fixed mechanism, test specimen monitor control mechanism, braced frame by pedestal 8,
Column 5 and crossbeam 4 form, and driving mechanism is set on crossbeam top surface, and test specimen fixed mechanism includes upper fixture and lower fixture, compression bar top
End is connected with driving mechanism, and bottom end passes through crossbeam center and is connected with upper fixture, and hot environment case is set to base top center, test specimen
It is set in hot environment case by lower fixture level, it includes computer 14, load sensor 11 and position that test specimen, which monitors control mechanism,
Displacement sensor, load sensor are set to compression bar and are connected by cable with computer with the junction of upper fixture, and displacement sensor is
LVDT displacement sensor 13 is set to test specimen bottom center and is connected by cable with computer, the deformation displacement of creep test specimen is believed
Breath reaches in computer, and hot environment case is connected by cable with computer, and hot environment case has the function of registration, can be real-time
It shows the temperature inside the box, and temperature information is passed in computer, test specimen fixed mechanism passes through through-flow conducting wire 9 and 15 phase of power supply box
Even, power supply box is connected by cable with computer, there is constant-current source in power supply box, and current value is adjustable by computer.
Driving mechanism includes motor 1, retarder 2, turbine and worm 3 and ball-screw, and motor output end and retarder input
End is connected, and retarder output end is connected with worm screw, and worm screw engages with turbine, and the lead screw of ball-screw is connected with worm gear, compression bar top
End is connected with the nut of ball-screw.
Upper fixture includes upper fixture head 12-2 and upper fixture column 12-1, and lower fixture includes lower clamp head 7-2 and lower press post
7-3, upper and lower press post are connect with the bottom thread of upper and lower clamp head respectively, and lower press post is fixed on pedestal, lower clamp head
It is connected by screw 7-1 with test specimen two ends, upper fixture head is abutted against with test specimen end face center, upper fixture column and compression bar bottom end phase
Even, upper fixture head and lower clamp head are used to fix creep test specimen and convert bending load for the axial load that compression bar transmits.
Load sensor is spoke type load sensor, and the centre bore of compression bar bottom end and load sensor is spirally connected, upper fixture
Column is spirally connected by screw and the connecting hole on load sensor circumferential surface, thus by measure compression bar stress obtain creep test specimen by
Power situation.
Upper fixture head and lower press post are ceramic material, and through-flow conducting wire passes through pedestal and lower press post and lower clamp head phase
Even, electric current is formed into a loop by creep test specimen.
Upper and lower clamp head is that top is arc-shaped cone structure, to guarantee that creep surface of test piece loads uniform and energy
Reduce the influence of the frictional force between creep test specimen.
When carrying out the through-flow bending creep test of electrician's busbar, it can carry out in the steps below:
Step 1: joint test device as described above；
Step 2: opening hot environment case, creep test specimen is placed on the horizontal plane where two lower clamp heads, and use spiral shell
Silk is fixed, adjusts the position of upper fixture head until touching the upper surface of creep test specimen；
Step 3: hot environment case is connected, assigned temperature is heated to creep test specimen, and keep the temperature minute；
Step 4: being closed the control switch of power supply box by computer, and the electric current set is made to pass through creep test specimen；
Step 5: executing loading procedure, and starting driving mechanism drives compression bar to load creep test specimen, and respectively by bearing
Lotus sensor and LVDT sensor pass the information such as load, displacement back to computer, it should be noted that loading procedure should keep pressing
Power is consistent.
Step 6: according to test load and test specimen line of deflection, answering for equivalent uniaxial tensile test is obtained by transfer equation
Power and strain information may further obtain creep curve and Creep Equation etc..
The above, part specific embodiment only of the present invention, but scope of protection of the present invention is not limited thereto.This
The technical staff in field without departing from the principle and essence of the present invention, can make a variety of changes to these embodiments
It more or modifies, but these change and modification should all fall into protection scope of the present invention.
Claims (7)
1. a kind of through-flow bending creep testing device suitable for electrician's busbar, which is characterized in that including braced frame, driving machine
Structure, compression bar, hot environment case, test specimen, test specimen fixed mechanism, test specimen monitor control mechanism, and the braced frame is by pedestal, column
It is formed with crossbeam, the driving mechanism is set on crossbeam top surface, and the test specimen fixed mechanism includes upper fixture and lower fixture, described
Compression bar top is connected with driving mechanism, and bottom end passes through crossbeam center and is connected with upper fixture, and the hot environment case is set to pedestal top
Portion center, the test specimen are set in hot environment case by lower fixture level, test specimen monitoring control mechanism include computer,
Load sensor and displacement sensor, the load sensor is set to compression bar and the junction of upper fixture passes through cable and computer
Be connected, institute's displacement sensors are set to test specimen bottom center and are connected with computer by cable, hot environment case pass through cable and
Computer is connected, and test specimen fixed mechanism is connected by through-flow conducting wire with power supply box, and the power supply box passes through cable and computer phase
Even.
2. a kind of through-flow bending creep testing device suitable for electrician's busbar according to claim 1, which is characterized in that
The driving mechanism includes motor, retarder, turbine and worm and ball-screw, and motor output end is connected with retarder input terminal,
Retarder output end is connected with worm screw, and worm screw engages with turbine, and the lead screw of the ball-screw is connected with worm gear, the compression bar top
End is connected with the nut of ball-screw.
3. a kind of through-flow bending creep testing device suitable for electrician's busbar according to claim 2, which is characterized in that
The upper fixture includes upper fixture head and upper fixture column, and the lower fixture includes lower clamp head and lower press post, upper and lower press post
It is connect respectively with the bottom thread of upper and lower clamp head, lower press post is fixed on the pedestal, and lower clamp head passes through screw and examination
Part both ends are connected, and upper fixture head is abutted against with test specimen end face center, and upper fixture column is connected with the compression bar bottom end.
4. a kind of through-flow bending creep testing device suitable for electrician's busbar according to claim 3, which is characterized in that
The load sensor is spoke type load sensor, and the centre bore of the compression bar bottom end and load sensor is spirally connected, upper fixture
Column is spirally connected by screw and the connecting hole on load sensor circumferential surface.
5. a kind of through-flow bending creep testing device suitable for electrician's busbar according to claim 4, which is characterized in that
The upper fixture head and lower press post are ceramic material, and the through-flow conducting wire passes through the pedestal and lower press post and lower fixture
Head is connected.
6. a kind of through-flow bending creep testing device suitable for electrician's busbar according to claim 3, which is characterized in that
The upper and lower clamp head is that top is arc-shaped cone structure.
7. a kind of through-flow bending creep testing device suitable for electrician's busbar according to claim 1, which is characterized in that
Institute's displacement sensors are LVDT displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810679922.8A CN109060553B (en) | 2018-06-27 | 2018-06-27 | Through-flow bending creep test device suitable for electrician busbar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810679922.8A CN109060553B (en) | 2018-06-27 | 2018-06-27 | Through-flow bending creep test device suitable for electrician busbar |
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| CN109060553A true CN109060553A (en) | 2018-12-21 |
| CN109060553B CN109060553B (en) | 2021-01-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110232860A (en) * | 2019-06-11 | 2019-09-13 | 长沙理工大学 | Multifunction test device and its test method for soil mechanics plane strain problems |
| CN110987680A (en) * | 2019-12-13 | 2020-04-10 | 华中科技大学 | Bending strain generating device and application thereof |
| CN116539519A (en) * | 2023-07-07 | 2023-08-04 | 哈尔滨工业大学 | Dynamic measuring device and system for internal consumption of structural sample |
| CN117804947A (en) * | 2023-11-28 | 2024-04-02 | 中国电器科学研究院股份有限公司 | Composite material test device and method capable of automatically loading and maintaining constant stress |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116539519A (en) * | 2023-07-07 | 2023-08-04 | 哈尔滨工业大学 | Dynamic measuring device and system for internal consumption of structural sample |
| CN117804947A (en) * | 2023-11-28 | 2024-04-02 | 中国电器科学研究院股份有限公司 | Composite material test device and method capable of automatically loading and maintaining constant stress |
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