CN109060553B - Through-flow bending creep test device suitable for electrician busbar - Google Patents
Through-flow bending creep test device suitable for electrician busbar Download PDFInfo
- Publication number
- CN109060553B CN109060553B CN201810679922.8A CN201810679922A CN109060553B CN 109060553 B CN109060553 B CN 109060553B CN 201810679922 A CN201810679922 A CN 201810679922A CN 109060553 B CN109060553 B CN 109060553B
- Authority
- CN
- China
- Prior art keywords
- test piece
- lower clamp
- upper clamp
- pressure rod
- column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005452 bending Methods 0.000 title claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013001 point bending Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Images
Classifications
-
- 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
Abstract
The invention provides a through-flow bending creep test device suitable for an electrician bus, which comprises a supporting frame, a driving mechanism, a pressure rod, a high-temperature environment box, a test piece fixing mechanism and a test piece monitoring control mechanism, wherein the supporting frame consists of a base, an upright post and a cross beam, the driving mechanism is arranged on the top surface of the cross beam, the test piece fixing mechanism comprises an upper clamp and a lower clamp, the top end of the pressure rod is connected with the driving mechanism, the bottom end of the pressure rod penetrates through the center of the cross beam and is connected with the upper clamp, the high-temperature environment box is arranged at the center of the top of the base, a test piece is horizontally arranged in the high-temperature environment box through the lower clamp, the test piece monitoring control mechanism comprises a computer, a load sensor. The invention has reasonable structural design and can simulate the actual operating condition of the creep test piece to the maximum extent.
Description
Technical Field
The invention belongs to the technical field of mechanical property detection of an electrician bus bar, and particularly relates to a through-flow bending creep test device suitable for the electrician bus bar.
Background
The electrical busbar is a main medium for transmitting electric energy in electrical equipment such as high and low voltage electrical appliances, power distribution equipment, switch contacts, bus ducts and the like and super-large current equipment such as electrochemical plating, metal smelting and the like. In a working state, large current needs to pass through the busbar, so that temperature rise is generated, and creep deformation easily occurs at the lap joint under the action of thermal expansion and pressure stress. When these effects relax, the lap joint will relax, which increases the contact resistance and even leads to the serious effect of joint failure. Therefore, for the electrical busbar, the through-flow and creep under high temperature conditions are important factors limiting the structural reliability thereof. However, the conventional creep test device cannot perform a creep test of the electrical busbar under the through-flow condition, and therefore, the through-flow creep test device is adopted to simulate the creep behavior of the electrical busbar in the actual working condition, which is beneficial to improvement and popularization of relevant busbar materials.
In the creep test, the conventional tensile method is the most widely used method. Considering that the electrical busbar is usually subjected to compressive stress in actual working conditions, the tensile method cannot meet the conditions, the three-point bending method can generate the compressive stress, and the uniaxial creep property of the material, such as Norton constitutive equation parameters, creep limit and the like, can be directly obtained through bending creep test data, so that the three-point bending method is a reasonable method.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a through-flow bending creep test device suitable for an electrician busbar aiming at the existing problems, which can not only simulate the actual operation condition of the busbar and analyze the influence of the through-flow on the creep behavior of the busbar, but also obtain accurate test data.
The technical scheme adopted by the invention for solving the technical problems is as follows: a through-flow bending creep test device suitable for an electrician bus bar is characterized by comprising a supporting frame, a driving mechanism, a pressure rod, a high-temperature environment box, a test piece fixing mechanism and a test piece monitoring control mechanism, wherein the supporting frame consists of a base, a stand column and a cross beam, the driving mechanism is arranged on the top surface of the cross beam, the test piece fixing mechanism comprises an upper clamp and a lower clamp, the top end of the pressure rod is connected with the driving mechanism, the bottom end of the pressure rod penetrates through the center of the cross beam to be connected with the upper clamp, the high-temperature environment box is arranged at the center of the top of the base, the test piece is horizontally arranged in the high-temperature environment box through the lower clamp, the test piece monitoring control mechanism comprises a computer, a load sensor and a displacement sensor, the load sensor is arranged at the joint of the pressure rod and the upper, the high-temperature environment box is connected with the computer through a cable, the test piece fixing mechanism is connected with the power box through a through-flow wire, and the power box is connected with the computer through the cable.
According to the scheme, the driving mechanism comprises the motor, the speed reducer, the worm gear and the ball screw, the output end of the motor is connected with the input end of the speed reducer, the output end of the speed reducer is connected with the worm, the worm is meshed with the worm gear, the screw rod of the ball screw is connected with the worm gear, and the top end of the pressure rod is connected with the nut of the ball screw.
According to the scheme, the upper clamp comprises an upper clamp head and an upper clamp column, the lower clamp comprises a lower clamp head and a lower clamp column, the upper clamp column and the lower clamp column are respectively in threaded connection with the bottoms of the upper clamp head and the lower clamp head, the lower clamp column is fixed on the base, the lower clamp head is connected with the two ends of the test piece through screws, the upper clamp head is abutted to the center of the top surface of the test piece, and the upper clamp column is connected with the bottom end of the pressing rod.
According to the scheme, the load sensor is a spoke type load sensor, the bottom end of the pressure rod is in threaded connection with a central hole of the load sensor, and the upper clamp column is in threaded connection with a connecting hole in the circumferential surface of the load sensor through a screw.
According to the scheme, the upper clamp head and the lower clamp column are made of ceramic materials, and the through-flow conducting wire penetrates through the base and the lower clamp column to be connected with the lower clamp head.
According to the scheme, the upper clamp head and the lower clamp head are both cone structures with arc-shaped top ends.
According to the scheme, the displacement sensor is an LVDT displacement sensor.
The invention has the beneficial effects that: the through-flow bending creep test device is suitable for an electrical busbar, a load system, a temperature measuring system, a through-flow system and a displacement measuring system are combined together, a tested sample can be subjected to bending creep test in a heated and through-flow state, a computer-controlled automatic loading mode is adopted, the bending creep test can be performed by a load sensor and an LVDT (linear Variable Differential transducer) displacement sensor, the data is accurate, the reliability is high, the operation is simple, a high-temperature environment box provides a temperature environment required by the test, an accurate temperature value can be obtained, a computer program controls a current value output by a power box, the value is dynamically adjustable, various current waveforms can be applied, the actual operation working conditions of a creep test piece can be simulated to the maximum extent, the computer system can obtain information such as load, temperature, current, deformation and the like, a test curve is drawn, and the device has a fault diagnosis function, Alarm and the like.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
wherein: 1-a motor; 2-a reducer; 3-worm gear; 4-a cross beam; 5-upright column; 6-high temperature environment box; 7-1-screw; 7-2-lower clamp head; 7-3-lower clamp column; 8-a base; 9-a current conducting wire; 10-a compression bar; 11-a load cell; 12-1-mounting a clamp column; 12-2-upper clamp head; 13-LVDT displacement sensor; 14-a computer; 15-a power box; 16-test piece.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
As shown in figure 1, the through-flow bending creep test device suitable for the electrical busbar comprises a supporting frame, a driving mechanism, a pressure lever 10, a high-temperature environment box 6, a test piece 16, a test piece fixing mechanism and a test piece monitoring control mechanism, wherein the supporting frame consists of a base 8, an upright post 5 and a cross beam 4, the driving mechanism is arranged on the top surface of the cross beam, the test piece fixing mechanism comprises an upper clamp and a lower clamp, the top end of the pressure lever is connected with the driving mechanism, the bottom end of the pressure lever penetrates through the center of the cross beam and is connected with the upper clamp, the high-temperature environment box is arranged at the center of the top of the base, the test piece is horizontally arranged in the high-temperature environment box through the lower clamp, the test piece monitoring control mechanism comprises a computer 14, a load sensor 11 and a displacement sensor, the load sensor is arranged at the joint of the pressure lever and, the deformation displacement information of the creep test piece is transmitted to a computer, a high-temperature environment box is connected with the computer through a cable, the high-temperature environment box has a number indicating function, the temperature in the box can be displayed in real time, the temperature information is transmitted to the computer, a test piece fixing mechanism is connected with a power supply box 15 through a through-flow wire 9, the power supply box is connected with the computer through the cable, a constant current source is arranged in the power supply box, and the current value is adjustable through the computer.
The driving mechanism comprises a motor 1, a speed reducer 2, a worm gear and worm 3 and a ball screw, the output end of the motor is connected with the input end of the speed reducer, the output end of the speed reducer is connected with the worm, the worm is meshed with the worm gear, the screw rod of the ball screw is connected with the worm wheel, and the top end of the pressure rod is connected with the nut of the ball screw.
The upper clamp comprises an upper clamp head 12-2 and an upper clamp column 12-1, the lower clamp comprises a lower clamp head 7-2 and a lower clamp column 7-3, the upper clamp column and the lower clamp column are respectively in threaded connection with the bottoms of the upper clamp head and the lower clamp head, the lower clamp column is fixed on the base, the lower clamp head is connected with the two ends of the test piece through screws 7-1, the upper clamp head abuts against the center of the top surface of the test piece, the upper clamp column is connected with the bottom end of the compression bar, and the upper clamp head and the lower clamp head are used for fixing a creep test piece and converting an axial load transmitted by the compression bar into a bending load.
The load sensor is a spoke type load sensor, the bottom end of the pressure rod is in threaded connection with a center hole of the load sensor, and the upper clamp column is in threaded connection with a connecting hole in the peripheral surface of the load sensor through a screw, so that the stress condition of the creep test piece is obtained by measuring the stress of the pressure rod.
The upper clamp head and the lower clamp column are made of ceramic materials, the through-flow conducting wire penetrates through the base and the lower clamp column to be connected with the lower clamp head, and current passes through the creep test piece to form a loop.
The upper clamp head and the lower clamp head are both cone structures with arc-shaped top ends, so that the creep test piece is uniformly loaded on the surface, and the influence of friction force between the creep test piece and the creep test piece can be reduced.
When the through-flow bending creep test of the electrical busbar is carried out, the method can be carried out according to the following steps:
the method comprises the following steps: connecting the test device as described above;
step two: opening the high-temperature environment box, placing the creep test piece on the horizontal planes where the two lower clamp heads are positioned, fixing the creep test piece by using screws, and adjusting the position of the upper clamp head until the creep test piece contacts the upper surface of the creep test piece;
step three: switching on a high-temperature environment box, heating the creep test piece to a specified temperature, and keeping the temperature for minutes;
step four: closing a control switch of a power box through a computer to enable the set current to pass through the creep test piece;
step five: and executing a loading program, starting a driving mechanism to drive a pressure rod to load the creep test piece, and respectively transmitting information such as load, displacement and the like back to a computer by a load sensor and an LVDT sensor.
Step six: according to the test load and the test piece deflection line, stress and strain information of the equivalent uniaxial tensile test is obtained through a conversion equation, and a creep curve, a creep equation and the like can be further obtained.
The above description is only a part of the embodiments of the present invention, but the scope of the present invention is not limited thereto. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are intended to be included within the scope of the invention.
Claims (5)
1. A through-flow bending creep test device suitable for an electrician bus bar is characterized by comprising a supporting frame, a driving mechanism, a pressure rod, a high-temperature environment box, a test piece fixing mechanism and a test piece monitoring control mechanism, wherein the supporting frame consists of a base, an upright post and a cross beam, the driving mechanism is arranged on the top surface of the cross beam, the top end of the pressure rod is connected with the driving mechanism, the bottom end of the pressure rod penetrates through the center of the cross beam and is connected with an upper clamp, the high-temperature environment box is arranged at the center of the top of the base, the test piece is horizontally arranged in the high-temperature environment box through a lower clamp, the test piece monitoring control mechanism comprises a computer, a load sensor and a displacement sensor, the load sensor is arranged at the joint of the pressure rod and the upper clamp and is connected with the computer through a cable, the displacement, the test piece fixing mechanism is connected with the power box through a through-flow wire, the power box is connected with the computer through a cable, the test piece fixing mechanism comprises an upper clamp and a lower clamp, the upper clamp comprises an upper clamp head and an upper clamp column, the lower clamp comprises a lower clamp head and a lower clamp column, the upper clamp column and the lower clamp column are respectively in threaded connection with the bottoms of the upper clamp head and the lower clamp head, the lower clamp column is fixed on the base, the lower clamp head is connected with the two ends of the test piece through screws, the upper clamp head is in abutting joint with the center of the top surface of the test piece, the upper clamp column is connected with the bottom end of the compression bar, the upper clamp head and the lower clamp column are made of ceramic materials, the through-flow wire penetrates through the base and the lower clamp column to be connected with.
2. The through-flow bending creep test device suitable for electrical busbars according to claim 1, wherein the driving mechanism comprises a motor, a reducer, a worm gear and a ball screw, the output end of the motor is connected with the input end of the reducer, the output end of the reducer is connected with the worm gear, the worm gear is meshed with the worm gear, the screw shaft of the ball screw is connected with the worm gear, and the top end of the pressure rod is connected with the nut of the ball screw.
3. The through-flow bending creep test device suitable for the electrical busbar according to claim 2, wherein the load sensor is a spoke type load sensor, the bottom end of the pressure rod is in threaded connection with a central hole of the load sensor, and the upper clamp column is in threaded connection with a connecting hole on the peripheral surface of the load sensor through a screw.
4. The through-flow bending creep test device suitable for the electrical busbar according to claim 1, wherein the upper and lower clamp heads are both cone structures with arc-shaped top ends.
5. The through-flow bending creep test device for electrical busbars according to claim 1, wherein the displacement sensor is an 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109060553A CN109060553A (en) | 2018-12-21 |
| CN109060553B true CN109060553B (en) | 2021-01-19 |
Family
ID=64821446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810679922.8A Active CN109060553B (en) | 2018-06-27 | 2018-06-27 | Through-flow bending creep test device suitable for electrician busbar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109060553B (en) |
Families Citing this family (3)
| 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 |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4763529A (en) * | 1987-08-18 | 1988-08-16 | The United States Of America As Represented By The Secretary Of The Air Force | In-situ beta alumina stress simulator |
| JPH08178814A (en) * | 1994-10-27 | 1996-07-12 | Meidensha Corp | Strength test equipment |
| CN101216393A (en) * | 2007-12-28 | 2008-07-09 | 保定天威集团有限公司 | Self-adhering transposed conductor integral high-temperature bending strength experimental method and apparatus |
| KR20110077789A (en) * | 2009-12-30 | 2011-07-07 | 재단법인 포항산업과학연구원 | Bendability testing machine with temperature controller |
| CN103018110A (en) * | 2013-01-06 | 2013-04-03 | 深圳市宏之都科技有限公司 | Wire bending test machine |
| CN203203885U (en) * | 2013-03-20 | 2013-09-18 | 株洲时代电气绝缘有限责任公司 | Bending testing device |
| CN105259048A (en) * | 2015-11-02 | 2016-01-20 | 上海交通大学 | Real-time detecting device and method applied to sheet three-point bending performance test |
| CN106442131A (en) * | 2016-09-12 | 2017-02-22 | 郑州大学 | Piezoelectric-semiconductor multi-field-coupling fracture failure experiment research method |
| CN107894366A (en) * | 2017-09-30 | 2018-04-10 | 重庆鸽牌电线电缆有限公司 | A kind of trapezoidal copper bar stretching test method |
-
2018
- 2018-06-27 CN CN201810679922.8A patent/CN109060553B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4763529A (en) * | 1987-08-18 | 1988-08-16 | The United States Of America As Represented By The Secretary Of The Air Force | In-situ beta alumina stress simulator |
| JPH08178814A (en) * | 1994-10-27 | 1996-07-12 | Meidensha Corp | Strength test equipment |
| CN101216393A (en) * | 2007-12-28 | 2008-07-09 | 保定天威集团有限公司 | Self-adhering transposed conductor integral high-temperature bending strength experimental method and apparatus |
| KR20110077789A (en) * | 2009-12-30 | 2011-07-07 | 재단법인 포항산업과학연구원 | Bendability testing machine with temperature controller |
| CN103018110A (en) * | 2013-01-06 | 2013-04-03 | 深圳市宏之都科技有限公司 | Wire bending test machine |
| CN203203885U (en) * | 2013-03-20 | 2013-09-18 | 株洲时代电气绝缘有限责任公司 | Bending testing device |
| CN105259048A (en) * | 2015-11-02 | 2016-01-20 | 上海交通大学 | Real-time detecting device and method applied to sheet three-point bending performance test |
| CN106442131A (en) * | 2016-09-12 | 2017-02-22 | 郑州大学 | Piezoelectric-semiconductor multi-field-coupling fracture failure experiment research method |
| CN107894366A (en) * | 2017-09-30 | 2018-04-10 | 重庆鸽牌电线电缆有限公司 | A kind of trapezoidal copper bar stretching test method |
Non-Patent Citations (3)
| Title |
|---|
| 《电工母线排用导体材料的研究进展》;何卫 等.;《热加工工艺》;20160131;第45卷(第2期);第34-37,40页 * |
| 《电工用6101 挤压铝合金母排生产的关键技术要素和工艺控制要点》;叶细发.;《2016 中国铝加工产业技术创新交流大会论文集》;20161231;DI 335-340页 * |
| 《金属材料的抗蠕变机理及方法综述》;王利民 等.;《材料导报》;20180531;第373-377页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109060553A (en) | 2018-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109060553B (en) | Through-flow bending creep test device suitable for electrician busbar | |
| CN108279179B (en) | Constant and fatigue stress test device and test method | |
| WO2020207271A1 (en) | Device for testing service life in simulated environment | |
| CN101520402A (en) | Experimental facility for testing electrochemical signals of various materials in high-temperature high-pressure environment | |
| CN103149442A (en) | Automatic testing device for contact resistor made of electrical contact material | |
| CN201016946Y (en) | Heat conductive material parameter testing device | |
| CN101769963A (en) | Line insulation testing system | |
| CN101187612A (en) | Small drill drift creepage test device | |
| CN211553616U (en) | Spring stress relaxation test bench | |
| CN202886177U (en) | Comprehensive testing machine for electro-hydraulic servo steel strands | |
| CN210626572U (en) | Life test device under simulation environment | |
| CN113745881A (en) | Charging seat and automobile | |
| CN204988982U (en) | A electric friction wear testing machine for brush material | |
| CN203376453U (en) | Torque motor force testing device | |
| CN103969109A (en) | Universal sample fixation device for push-pull test apparatus | |
| CN211826386U (en) | Electronic cylinder load test system | |
| CN102590260B (en) | Heat-electric injury testing system of carbon fiber reinforced resin matrix composite material | |
| CN101666691B (en) | Temperature-induction nut testing instrument | |
| CN212159989U (en) | On-spot IGBT detection device | |
| CN205427140U (en) | High voltage circuit breaker stroke test testing system based on DSP | |
| CN210720022U (en) | Composite insulator buckling detection device | |
| CN205176061U (en) | Temperature rise drop test platform | |
| CN219495920U (en) | Test cable equipment | |
| CN208547690U (en) | A kind of Flouride-resistani acid phesphatase VDMOS pipe single-particle performance testing device | |
| CN215218387U (en) | Low-temperature torsion testing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |