CN102507349B - Micro fatigue testing machine with variable displacement control - Google Patents
Micro fatigue testing machine with variable displacement control Download PDFInfo
- Publication number
- CN102507349B CN102507349B CN 201110321831 CN201110321831A CN102507349B CN 102507349 B CN102507349 B CN 102507349B CN 201110321831 CN201110321831 CN 201110321831 CN 201110321831 A CN201110321831 A CN 201110321831A CN 102507349 B CN102507349 B CN 102507349B
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- connecting rod
- guide rod
- direct current
- testing machine
- driving mechanism
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Abstract
The invention discloses a micro fatigue testing machine with variable displacement control, which comprises a base, wherein the base is provided with a guide rail bracket and a drive mechanism bracket; a left chuck, a right chuck, a counter and a sliding block are arranged on the guide rail bracket; the left chuck is arranged on the sliding block; a drive mechanism is arranged on the drive mechanism bracket; the drive mechanism comprises a direct current motor, a short connection rod, a shaft, a guide rod and long connection rod; the direct current motor is fixed on the drive mechanism bracket; an output shaft of the direct current motor is connected with the short connection rod; the middle part of the guide rod is rotationally connected to the drive mechanism bracket; a first end of the guide rod is connected with the short connection rod through the shaft; a second end of the guide rod is hinged with one end of the long connection rod, and the other end of the long connection rod is connected to the left chuck or the sliding block. The micro fatigue testing machine disclosed by the invention has the following beneficial effects: reciprocating stretch can be realized under an alternate load action, the micro fatigue testing machine is simpler in structure and more convenient in processing without special parts, and meanwhile, continuous change of stretch displacement within 1-5 cm can be satisfied.
Description
Technical field
The present invention relates to the test unit that a displacement is controlled, the miniature test that especially can carry out the torture test of rubber test specimen.
Background technology
Aircraft integral tank in use fluid sealant can be subject to the effect of alternate load, produces the problems such as fatigue failure.Therefore the fatigue behaviour of fluid sealant is most important to the performance impact of fuel tank, if fluid sealant under arms in process Material degradation cause seepage, can not upgrade comprehensively, the modular repair difficulty is also larger.Due to its non-dismountable property, have material impact to machine life the sealing life of integral tank, and sealant lifetime used can represent integral tank sealing life, therefore sealant carried out life appraisal significant.Adopted the artificial accelerated aging test method to come projected life in the past, because end point values is determined unreasonable, lack again direct and indirect proof, the assessment result using value is not high, and existing fatigue tester is in the majority with the maximization hydrostatic control in the market, not the miniature fatigue test device of this type of suitable sealant material.
Summary of the invention
Can not effectively test the shortcoming of the fatigue behaviour of fluid sealant in order to overcome existing large-scale fatigue tester and test method, the invention provides the micro fatigue testing machine that a variable displacement is controlled, this testing machine can be according to testing requirements, change the stretching displacement of test specimen, the relevant fatigue behaviour of test fluid sealant.
the technical solution adopted for the present invention to solve the technical problems is: the micro fatigue testing machine that a kind of variable displacement is controlled, comprise pedestal, be provided with rail brackets and driving mechanism support on this pedestal, be provided with left chuck on described rail brackets, right chuck, counter and slide block, described left chuck is arranged on slide block, be provided with driving mechanism on described driving mechanism support, this driving mechanism comprises direct current generator, short connecting rod, axle, guide rod and long connecting rod, described direct current generator is fixed on the driving mechanism support, the output shaft of direct current generator is connected with described short connecting rod, the middle part of described guide rod is rotatably connected on the driving mechanism support, the first end of guide rod is connected with short connecting rod by described axle, the second end of guide rod and an end of described long connecting rod are hinged, the other end of long connecting rod is connected on described left chuck or slide block.
Be provided with two section material guide rails on described driving mechanism support, be provided with motor mounting plate on section material guide rail, described direct current generator is fixed on described motor mounting plate.
Described counter is photoelectric counter, and the transmitting terminal of this photoelectric counter and receiving end are arranged on guide rail both sides, the slide block to-and-fro movement once, the count display indicating value adds one.
The link of described guide rod and short connecting rod offers elongated slot, and described axle is arranged in this groove.
Also be connected with on described direct current generator and change the rotating speed machine governor that straightens the stream motor.
When working due to testing machine, velocity of rotation is larger, so the place of being rotationally connected all is equipped with bearing, reduces friction.Due to the rotation of motor, short connecting rod will be with moving axis along the stem guiding trough to-and-fro movement, thereby make guide rod left and right reciprocating rotation.Long connecting rod is connected that revolute pair connects with guide rod, and then makes slide block left and right to-and-fro movement on guide rail.Because the length of short connecting rod is constant, by the position of mobile motor installing plate on section bar support, electric machine rotation one circle can cause that the angle that guide rod rotates also will change, and the displacement of slide block changes then: namely motor is away from main support, and when rotating a circle, the displacement of slide block diminishes; Motor is near main support, and when rotating a circle, the displacement of slide block becomes large, and displacement is linear change.The right-hand member of left chuck is connected with test specimen, and the other end of test specimen will be fixed on right chuck, and mobile right chuck can rationally be regulated the required length of test specimen, when electric machine rotation, slide block reciprocatingly slides the left and right, drives test specimen and is repeatedly stretched under alternate load, in order to complete experiment.
The invention has the beneficial effects as follows, can realize under the alternate load effect back and forth stretching, structure is simpler, there is no special parts, process more conveniently, and the while can be satisfied stretching displacement 1cm-5cm and be changed continuously.
Description of drawings
Fig. 1 is axial projection's schematic diagram such as of the present invention;
Fig. 2 is front view of the present invention;
Fig. 3 is the annexation figure of external unit of the present invention;
Attached number in the figure title: 1. pedestal, 2. support, 3. right chuck, 4. left chuck, 5. slide block, 6. guide rail, 7. long connecting rod, 8. guide rod, 9. main support, 10. short connecting rod, 11. motor mounting plates, 12. direct current generator, 13. section material guide rails, 14. section bar supports, 15. axle, 16. Switching Power Supplies, 17. machine governors, 18. the photoelectric counting display, 19. photoelectric counting transmitting terminals, 20. photoelectric counting receiving ends.
Embodiment
In Fig. 1, on pedestal 1, section material guide rail 13, direct current generator 12, short connecting rod 10 are pressed certain way and are connected between guide rod 8, long connecting rod 7, slide block 5, left chuck 4, right chuck 3.Direct current generator 12 is connected with guide rod 8 by short connecting rod 10 and an axle 15, and guide rod 8 passes through long connecting rod 7 and slide block 5 and is connected chuck 4 and is connected.When working due to testing machine, velocity of rotation is larger, so the revolute pair junction all is equipped with bearing, reduces friction.Due to the rotation of motor 12, short connecting rod 10 will be with the groove to-and-fro movement of moving axis 15 along guide rod 8, thereby make guide rod 8 left and right reciprocating rotations.It is that revolute pair connects that long connecting rod 7 is connected with guide rod, and then makes slide block 5 left and right to-and-fro movement on guide rail 6.The driving mechanism support comprises main support 9 and section bar support 14, because the length of short connecting rod 10 is constant, by the position of mobile motor installing plate 11 on section bar support 14, motor 12 rotates a circle can cause that the angle of guide rod 8 rotations also will change, then the displacement of slide block 5 changes: namely motor 8 is away from main support 9, and when rotating a circle, the displacement of slide block 5 diminishes; Motor 12 is near main support 9, and when rotating a circle, the displacement of slide block 5 becomes large, and displacement is linear change.The right-hand member of left chuck 4 is connected with test specimen, and the other end of test specimen will be fixed on right chuck 3, and mobile right chuck 3 can rationally be regulated the required length of test specimen, when motor 12 rotates, slide block 5 reciprocatingly slides the left and right, drives test specimen and is repeatedly stretched under alternate load, in order to complete experiment.
In Fig. 3, the transmitting terminal 19 of photoelectric counter and receiving end 20 are electrically connected to count display 18, and count display 18 use wires are connected with Switching Power Supply 16.DC speed-reducing 12 and machine governor 17 are electrically connected to, and speed regulator 17 is connected with Switching Power Supply 16 by wire.Slide block 5 slides on guide rail 6, and the transmitting terminal 19 of photoelectric counter and receiving end 20 are placed on respectively the both sides of guide rail, and whenever slide block makes a round trip at transmitting terminal and receiving end, the displayed value of counter adds one.The knob of regulating electric machine speed regulator 17 can change the rotating speed of motor 12, thus the frequency of adjusting test machine work.
Claims (5)
1. the micro fatigue testing machine controlled of a variable displacement, it is characterized in that: comprise pedestal (1), be provided with rail brackets (6) and driving mechanism support on this pedestal (1), be provided with left chuck (4) on described rail brackets (6), right chuck (3), counter and slide block (5), described left chuck (4) is arranged on slide block (5), be provided with driving mechanism on described driving mechanism support, this driving mechanism comprises direct current generator (12), short connecting rod (10), axle (15), guide rod (8) and long connecting rod (7), described direct current generator (12) is fixed on driving mechanism support (14), the output shaft of direct current generator (12) is connected with described short connecting rod (10), the middle part of described guide rod (8) is rotatably connected on driving mechanism support (14), the first end of guide rod (8) is connected with short connecting rod (10) by described axle (15), one end of the second end of guide rod (8) and described long connecting rod (7) is hinged, the other end of long connecting rod (7) is connected on described left chuck (4) or slide block (5).
2. testing machine according to claim 1, it is characterized in that: described driving mechanism support comprises main support (9) and section bar support (14), what rotated at described guide rod (8) middle part is arranged on described main support (9), be provided with two section material guide rails (13) on section bar support (14), be provided with motor mounting plate (11) on section material guide rail (13), described direct current generator (12) is fixed on described motor mounting plate (11).
3. testing machine according to claim 2, it is characterized in that: described counter is photoelectric counter, the transmitting terminal of photoelectric counter (19) and receiving end (20) are electrically connected to count display (18), the transmitting terminal of this photoelectric counter (19) and receiving end (20) are arranged on rail brackets (6) both sides, slide block (5) to-and-fro movement once, count display (18) indicating value adds one.
4. according to claim 2 or 3 described testing machines is characterized in that: described guide rod (8) offers elongated slot with the link of short connecting rod (10), and described axle is arranged in this groove.
5. testing machine according to claim 4, is characterized in that: also be connected with on described direct current generator (12) and change the machine governor (17) that straightens stream motor (12) rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110321831 CN102507349B (en) | 2011-10-21 | 2011-10-21 | Micro fatigue testing machine with variable displacement control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110321831 CN102507349B (en) | 2011-10-21 | 2011-10-21 | Micro fatigue testing machine with variable displacement control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102507349A CN102507349A (en) | 2012-06-20 |
| CN102507349B true CN102507349B (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110321831 Expired - Fee Related CN102507349B (en) | 2011-10-21 | 2011-10-21 | Micro fatigue testing machine with variable displacement control |
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| CN (1) | CN102507349B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998617A (en) * | 2012-09-21 | 2013-03-27 | 国家电网公司 | Low-voltage switch mechanical property detecting device |
| CN103353429B (en) * | 2013-06-25 | 2015-12-09 | 南京航空航天大学 | A kind of Simple test-piece fatigue tester |
| CN105445021A (en) * | 2016-01-08 | 2016-03-30 | 托肯恒山科技（广州）有限公司 | Natural gas high-pressure ball valve life test apparatus |
| CN111114824B (en) * | 2019-12-18 | 2023-04-07 | 贵州华烽电器有限公司 | Device for testing service life of airplane control device |
| CN113933193A (en) * | 2021-10-14 | 2022-01-14 | 哈尔滨工程大学 | Piston ring fatigue testing machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2493924Y (en) * | 2001-04-19 | 2002-05-29 | 郑州机械研究所 | Small loading fatigue tester |
| CN201060097Y (en) * | 2007-06-20 | 2008-05-14 | 中国石油天然气集团公司 | Continuance pipe multi-axis combined load low-cycle fatigue tester |
| CN101324497A (en) * | 2008-07-08 | 2008-12-17 | 奇瑞汽车股份有限公司 | Flexible plate assembly axial fatigue test method |
| CN201622210U (en) * | 2010-03-16 | 2010-11-03 | 陈跃良 | Adjustable fretting fatigue tester |
-
2011
- 2011-10-21 CN CN 201110321831 patent/CN102507349B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2493924Y (en) * | 2001-04-19 | 2002-05-29 | 郑州机械研究所 | Small loading fatigue tester |
| CN201060097Y (en) * | 2007-06-20 | 2008-05-14 | 中国石油天然气集团公司 | Continuance pipe multi-axis combined load low-cycle fatigue tester |
| CN101324497A (en) * | 2008-07-08 | 2008-12-17 | 奇瑞汽车股份有限公司 | Flexible plate assembly axial fatigue test method |
| CN201622210U (en) * | 2010-03-16 | 2010-11-03 | 陈跃良 | Adjustable fretting fatigue tester |
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| Publication number | Publication date |
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| CN102507349A (en) | 2012-06-20 |
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