CN107389481A - Fatigue tester - Google Patents
Fatigue tester Download PDFInfo
- Publication number
- CN107389481A CN107389481A CN201710650490.3A CN201710650490A CN107389481A CN 107389481 A CN107389481 A CN 107389481A CN 201710650490 A CN201710650490 A CN 201710650490A CN 107389481 A CN107389481 A CN 107389481A
- Authority
- CN
- China
- Prior art keywords
- eccentric
- fatigue tester
- haulage gear
- motor
- fatigue
- 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.)
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
-
- 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
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Electromagnetism (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a kind of fatigue tester (100), including：Drive mechanism, the drive mechanism includes motor (122), eccentric actuation and linkage connector (130), the linkage connector (130) is produced vibration the rotary motion of the motor (122) by the eccentric actuation；Haulage gear, the haulage gear include ball pivot (162)；Connecting rod (140), the connecting rod (140) is connected by the ball pivot (162) with the haulage gear, wherein, the vibration of the linkage connector (130) of the drive mechanism is changed into reciprocating motion by the haulage gear by the ball pivot (162).The frequency of test force can be conveniently adjusted by the rotating speed of regulation motor.
Description
Technical field
The present invention relates to a kind of device for testing mechanical property, and in particular to a kind of fatigue examination for testing fatigue mechanics performance
Test machine.
Background technology
In engineering in practice, the service life of component of machine is one of plant equipment or the main performance of building structure.
Many parts are in the actual use of plant equipment or building structure by dynamic load effect.With by during dead weight not
Together, obvious deformation would generally not occur for these parts with fatigue rupture may occur in the case of surrender.Fatigue rupture pair
The performance and security performance of plant equipment or building structure have significant impact.Therefore, need to carry out for parts tired
Labor is tested to detect its fatigue mechanics performance.
Fatigue test refers to σ -1 by metal material measuring metal material, the S-N curves of drafting material, and then
Observe fatigue rupture phenomenon and Fracture Characteristics, and then the method by determining the Metal Material Fatigue limit under symmetrical cycle.Detection
Equipment typically uses fatigue tester.
Under sufficiently large alternate stress effect, in the portion such as the mutation of hardware profile or surface indentation or internal flaw
Position, all it may trigger microfissure because of larger stress concentration.Scattered microfissure splits formation macroscopic view by assembling to link up
Line.Established macroscopic cracking rallentando extends, and member cross-sections progressively weaken, when reaching certain limit, component meeting
Fracture suddenly.The fatigue of above-mentioned failure phenomenon, referred to as metal caused by because of metal alternate stress.Plastic property is good under static load
Material, when bearing alternate stress, often in the case of no substantially plastic deformation, break suddenly less than yield limit in stress
Split.Fatigue fracture is significantly divided into two regions：Relatively smooth Crack Extension area and more coarse fracture zone.Crackle is formed
Afterwards, when alternate stress makes the both sides of crackle and the when of opening and close, mutually extruding grind repeatedly, smooth areas is just formed by
's.The change of the interruption and size of load, more Crack frontal lines are left in smooth areas.Then it is most as coarse fracture zone
Break to form suddenly afterwards.Statistics shows that the failure of machine components, there are about 70% or so is Er Qiezao caused by fatigue
Into most of accident be catastrophic.Therefore, it is of practical significance by the antifatigue performance of experimental study metal material.
At present, certain experiences method and theory have been accumulated for fatigue mechanics performance both at home and abroad.It is and existing based on these
Theoretical and method have developed a variety of fatigue testers, and function constantly increases with application, to meet different materials
Expect the demand of fatigue test.
Common fatigue tester includes hydraulic servo type, electromagnetic type and mechanical several types.Wherein hydraulic servo type
Fatigue tester is current more advanced test device, but it is tested by hydraulic control so that its experimentation cost is high,
Power consumption is big under low frequency operation state, and testing cost is high.Electromagnetic type fatigue tester is applied to high-frequency work state, main to use
It is but poor for fatigue behaviour in general test specimen effect in the test preferable ferrous metal product of fatigue behaviour.Mechanical fatigue
Testing machine is applicable the fatigue test not high to frequency requirement, the small low cost of power, and main operational principle is motion bar in driver
According to perseveration above and below the stroke of setting under the fixed frequency of setting, so as to Repeated Compression, but Mechanical Fatigue Test Machine exists
Frequency is single during work, and can not be regulated and controled, and can not simulate the real working condition of parts.
In summary, it is necessary to develop that a kind of test accuracy is high, Draw bar lock clamp force is controllable, easy to operate, cost is low and
The fatigue tester of efficiency high.
The content of the invention
To solve the above problems, one aspect of the present invention provides a kind of fatigue tester, including：Drive mechanism, the driving
Mechanism includes motor, eccentric actuation and linkage connector, by the eccentric actuation by the rotation of the motor
Motion makes the linkage connector produce vibration；Haulage gear, the haulage gear include ball pivot；Connecting rod, the connecting rod pass through institute
Ball pivot is stated to be connected with the haulage gear, wherein：The haulage gear is by the ball pivot by the company of the drive mechanism
The vibration of knock-off joint is changed into reciprocating motion.
Further, the eccentric actuation includes eccentric wheel shaft, eccentric wheel, eccentric shaft bearing, described inclined
Outside the eccentric wheel shaft, the eccentric shaft bearing is movably set in outside the eccentric wheel heart wheel fixed cover, described inclined
Heart wheel bearing is connected with the linkage connector；The eccentric wheel receives the rotary motion of the motor, drives the camshaft
Hold and cause the linkage connector to produce vibration.
Further, the eccentric actuation is by sufficient lubrication；And it is provided with below the eccentric wheel driving machine
Fuel-economizing plate and oil connection, the lubricant structure lower section overflowed with receiving the eccentric actuation are provided with fuel-economizing plate and oil pipe
Joint, to receive the lubricant that the eccentric actuation is overflowed.
Further, the motor is connected by motor transmission shaft and key with the eccentric wheel shaft.
Further, the connecting rod includes force snesor, adjusting screw rod；The connecting rod passes through the force snesor and described
Adjusting screw rod is connected to the ball pivot, the test force applied by the force snesor detection fatigue tester；It is described
Nut is provided with adjusting screw rod, the test force applied of the fatigue tester and examination are adjusted by adjusting the nut
Test initialized gap values.
Further, the haulage gear also includes straight pin, fixing key seat；The ball pivot is fixed with the straight pin
In the fixing key seat.
Further, the straight pin is provided at both ends with baffle ring, and the straight pin is fixed on described solid by the baffle ring
On rationed marketing seat.
Further, the haulage gear also includes transfer block, and the haulage gear is connected to by the transfer block and held
Support plate；The loading plate is arranged on horizontal sliding equipment, and the loading plate receives the reciprocating motion of the haulage gear.
Further, the motor is variable-frequency motor.
Further, the drive mechanism and the horizontal sliding equipment are arranged at the support of the fatigue tester
On.
The beneficial effects of the present invention are：The frequency of test force can be conveniently adjusted by the rotating speed of regulation motor；This
Outside, the test force applied and experiment primary clearance of fatigue tester 100 can be adjusted again by adjusting nut.So as to try
In the case that part determines, fatigue tester of the invention can really simulate various operating modes, directly obtain fatigue mechanics performance
Critical value in test during test specimen fatigue rupture.
Brief description of the drawings
Fig. 1 is the general view of the fatigue tester of the present invention.
Fig. 2 is the view of the drive mechanism of the fatigue tester of the present invention.
Fig. 3 is the sectional view of the drive mechanism of the fatigue tester of the present invention.
Fig. 4 is the view of the haulage gear of the fatigue tester of the present invention
In institute's accompanying drawing, equivalent or similar component is represented with same reference numerals.
Embodiment
The present invention is further described with reference to specific embodiment, but does not limit the invention to these tools
Body embodiment.One skilled in the art would recognize that present invention encompasses may include in Claims scope
All alternatives, improvement project and equivalents.
It should be noted that the reference of identical label is identical in description and claims of this specification and above-mentioned accompanying drawing
Part, term " first ", " second " etc. are for distinguishing similar object, without for describing specific order or successively
Order.It should be appreciated that the term so used can exchange in the appropriate case, so as to embodiments of the invention described herein.
In addition, term " comprising " and " having " and their any deformation, it is intended that cover it is non-exclusive include, for example, comprising
The process of series of steps or unit, method, system, product or equipment are not necessarily limited to those steps clearly listed or list
Member, but may include not list clearly or for the intrinsic other steps of these processes, method, product or equipment or list
Member.
The overall structure of fatigue tester
It refer to Fig. 1.Fig. 1 shows the overall structure diagram of fatigue tester 100.Fatigue tester 100 has machine
Seat 110, mounting seat 120, drive mechanism (not indicated in figure), connecting rod 140, haulage gear (not indicated in figure), loading plate 180.
Drive mechanism includes motor 122 (referring to Fig. 2), eccentric actuation and linkage connector 130, is driven by eccentric wheel
The rotary motion of motor 122 is made linkage connector 130 produce vibration by motivation structure；Haulage gear includes ball pivot 162；Connecting rod 140 is logical
Cross ball pivot 162 to be connected with haulage gear, haulage gear is changed the vibration of the linkage connector 130 of drive mechanism by ball pivot 162
To move back and forth.
Test specimen 190 is fixed on support 110, and loading plate 180 is located on horizontal sliding equipment 186.During experiment, hold
Support plate 180 passes through I-steel and the contact action of test specimen 190.
Haulage gear reciprocates through loading plate 180 and is applied on test specimen 190, tired so as to be carried out to test specimen 190
Labor Mechanics Performance Testing.Typically, applied according to the material of test specimen 190 and real working condition requirement, regulation fatigue tester 100
The size and acting frequency of the power added, the critical value of the fatigue rupture of test specimen 190 can be obtained.
Hereinafter, the concrete structure of fatigue tester 100 is introduced in more detail.
Drive mechanism
With reference to shown in Fig. 2 and Fig. 3, drive mechanism includes motor 122, eccentric actuation and linkage connector 130, passes through
The rotary motion of motor 122 is made linkage connector 130 produce vibration by eccentric actuation.
More specifically, motor 122 is fixedly mounted in mounting seat 120 by motor support base 122, the output of motor 122
Rotary motion is transferred to eccentric actuation and bar linkage structure 130 by axle 126 by key 127.
Preferably, motor 122 is variable-frequency motor.In order that the structure for obtaining drive mechanism is compacter, motor 122 may be selected
For horizontal machine.
Linkage connector 130 has hollow cylindrical portion, and eccentric shaft bearing 134 is contained in the hollow cylinder of linkage connector 130
In portion, all sides are provided with the link joint feature 138 for receiving connecting rod 140 outside.
The rotary motion of motor 122 is changed into vibration by eccentric actuation so that linkage connector 130 produces vibration.
More specifically, eccentric actuation includes eccentric wheel shaft 132, eccentric wheel 136, eccentric shaft bearing 134, eccentric wheel
136 fixed covers are outside eccentric wheel shaft 132, and eccentric shaft bearing 134 is movably set in outside eccentric wheel 136, eccentric shaft bearing
134 are connected with linkage connector 130.
Further, eccentric shaft bearing 134 and the collar 135 are cased with outside eccentric wheel 126, the collar 135 can cause the inclined of both sides
Heart wheel bearing 134 is fixed and separated, and space therein is suitable to accommodate lubricant；Eccentric wheel shaft 132 be cased with back-up ring 131 with
Fixed eccentric 136 and eccentric shaft bearing 134.
Eccentric wheel shaft 132 is fixed in fixed seat 128 by bearing block 137, and is fixed and connected with mounting seat 120
Connect.
So as to which eccentric wheel 136 receives the rotary motion of motor 122, drive eccentric shaft bearing 134 and the connecting rod is connect
First 130 produce vibration.That is, the output shaft 126 of motor 122 is rotated by key 127 with movable eccentric wheel power transmission shaft 132, after
And rotated with movable eccentric wheel 136, the rotational band movable eccentric wheel bearing 134 and linkage connector 130 of eccentric wheel 136 vibrate.
Further, eccentric actuation is fully lubricated by lubricant.Section is provided with below eccentric actuation
Oiled-plate method 121 and oil connection 123, to receive the lubricant that eccentric actuation is overflowed.Fuel-economizing plate 121 and oil connection 123
It can be fixed by screw, integral installation is in mounting seat 120.
Connecting rod
The one end of connecting rod 140 is connected on linkage connector 130 (referring to Fig. 2), and the other end is connected to ball pivot 162 (referring to Fig. 4).
In particular, connecting rod 140 includes force snesor 150, adjusting screw rod 160.Force snesor 150 passes through joint
142 are connected to the end of connecting rod 140, and adjusting screw rod 160 is connected to the opposite side of force snesor 150 by another joint 161, adjust
Section screw rod 160 is connected with ball pivot 162.During so as to effect of vibration, ball pivot 162 can avoid difference with buffer compensation respectively to shift differences
It is worth the damage to structure.
Further, nut 164 is provided with adjusting screw rod 160, by adjusting nut 164 to adjust fatigue tester
100 test force applied and experiment initialized gap values (initialized gap values between loading plate 180 and test specimen 190).
Haulage gear
Haulage gear includes the straight pin 178 being connected with ball pivot 162, and straight pin 178 passes through fixing key seat 170, steady pin
Seat 170 is fixed by fixing bolt 172 and transfer block 176.
Further, transfer block 176 is connected to loading plate 180 by fixing bolt 182.Loading plate 180 is arranged on level
On sliding equipment 186, loading plate 180 receives the reciprocating motion of haulage gear.Because ball pivot 162 can be with buffer compensation respectively to displacement
Difference, and horizontal sliding equipment 186 only moves up in level, thus fatigue tester 100 test specimen 190 is applied it is reciprocal
Dynamic load in horizontal direction.
And the frequency of test force can be adjusted by the rotating speed of regulation motor 122, it can be adjusted again by adjusting nut 164
The test force applied and experiment primary clearance of fatigue tester 100.In the case of being determined in test specimen, of the invention is tired
Labor testing machine can really simulate various operating modes, critical when directly obtaining test specimen fatigue rupture in fatigue mechanics performance test
Value.
As it appears from the above, although the present invention is illustrated with reference to limited embodiment and accompanying drawing, belonging to the present invention
Possess usual knowledge in field can carry out various modification and variation from this record per capita.Thus, other embodiment and power
Sharp claim belongs to scope of the claims with equivalent.
Claims (10)
1. a kind of fatigue tester (100), including：
Drive mechanism, the drive mechanism includes motor (122), eccentric actuation and linkage connector (130), by described
The rotary motion of the motor (122) is made the linkage connector (130) produce vibration by eccentric actuation；
Haulage gear, the haulage gear include ball pivot (162)；
Connecting rod (140), the connecting rod (140) are connected by the ball pivot (162) with the haulage gear,
It is characterized in that：The haulage gear is by the ball pivot (162) by the linkage connector (130) of the drive mechanism
Vibration be changed into reciprocating motion.
2. fatigue tester (100) according to claim 1, it is characterised in that
The eccentric actuation includes eccentric wheel shaft (132), eccentric wheel (136), eccentric shaft bearing (134), described
Located at the eccentric wheel shaft (132) outside, the eccentric shaft bearing (134) is movably set in institute to eccentric wheel (136) fixed cover
State eccentric wheel (136) outside, the eccentric shaft bearing (134) is connected with the linkage connector (130)；
The eccentric wheel (136) receives the rotary motion of the motor (122), drives the eccentric shaft bearing (134) and causes
The linkage connector (130) produces vibration.
3. fatigue tester (100) according to claim 2, it is characterised in that
The eccentric actuation is by sufficient lubrication；
And fuel-economizing plate (121) and oil connection (123) are provided with below the eccentric actuation, to receive the bias
The lubricant that actuation is overflowed.
4. fatigue tester (100) according to claim 2, it is characterised in that the motor (122) is driven by motor
Axle (126) and key (127) are connected with the eccentric wheel shaft (132).
5. fatigue tester (100) according to claim 1, it is characterised in that
The connecting rod (140) includes force snesor (150), adjusting screw rod (160)；The connecting rod (140) is sensed by the power
Device (150) and the adjusting screw rod (160) are connected to the ball pivot (162), are detected by the force snesor (150) described tired
The test force that labor testing machine (100) is applied；
Nut (164) is provided with the adjusting screw rod (160), is tried by adjusting the nut (164) with adjusting the fatigue
Test the test force applied and experiment initialized gap values of machine (100).
6. fatigue tester (100) according to claim 1, it is characterised in that
The haulage gear also includes straight pin (178), fixing key seat (170)；
The ball pivot (162) and the straight pin (178) and be fixed in the fixing key seat (170).
7. fatigue tester (100) according to claim 6, it is characterised in that
The straight pin (178) is provided at both ends with baffle ring (174), and the straight pin (178) is fixed on by the baffle ring (174)
On the fixing key seat (170).
8. fatigue tester (100) according to claim 6, it is characterised in that
The haulage gear also includes transfer block (176), and the haulage gear is connected to loading plate by the transfer block (176)
(180)；
The loading plate (180) is arranged on horizontal sliding equipment (186), and the loading plate (180) receives the haulage gear
Reciprocating motion.
9. fatigue tester (100) according to claim 1, it is characterised in that the motor (122) is variable-frequency motor.
10. fatigue tester (100) according to claim 8, it is characterised in that the drive mechanism and the level
Sliding equipment (186) is arranged on the support (110) of the fatigue tester (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710650490.3A CN107389481B (en) | 2017-08-02 | 2017-08-02 | Fatigue testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710650490.3A CN107389481B (en) | 2017-08-02 | 2017-08-02 | Fatigue testing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107389481A true CN107389481A (en) | 2017-11-24 |
| CN107389481B CN107389481B (en) | 2023-05-26 |
Family
ID=60344508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710650490.3A Active CN107389481B (en) | 2017-08-02 | 2017-08-02 | Fatigue testing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107389481B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489726A (en) * | 2018-05-23 | 2018-09-04 | 江苏科信燃气设备有限公司 | Durability detection device for gas pressure regulator, governor diaphragm |
| CN112554869A (en) * | 2021-02-25 | 2021-03-26 | 中国科学院地质与地球物理研究所 | Hinge support and test equipment |
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| JP2006138460A (en) * | 2004-11-10 | 2006-06-01 | Koyo Seisakusho:Kk | Mechanism for changing revolving movement into reciprocating linear movement |
| CN101349625A (en) * | 2008-09-11 | 2009-01-21 | 江都市明珠试验机械厂 | Fatigue testing machine |
| CN201266157Y (en) * | 2008-09-18 | 2009-07-01 | 江苏明珠试验机械有限公司 | Torsion fatigue testing machine |
| WO2009139089A1 (en) * | 2008-05-14 | 2009-11-19 | 国際計測器株式会社 | Vibration testing system |
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| CN103900916A (en) * | 2014-03-06 | 2014-07-02 | 燕山大学 | Pulling and bending multi-axis loading fatigue testing machine |
| CN105092397A (en) * | 2015-05-25 | 2015-11-25 | 河南科技大学 | Mechanical structure fatigue damage online monitoring test device |
| DE102015103391B3 (en) * | 2015-03-09 | 2016-01-28 | F+E Ingenieurgesellschaft Mbh | Mechanical-dynamic pulser |
| CN207036585U (en) * | 2017-08-02 | 2018-02-23 | 中国地震局工程力学研究所 | Fatigue tester |
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2017
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|---|---|---|---|---|
| CH484424A (en) * | 1968-04-11 | 1970-01-15 | Inst Mek An Ussr | Device for converting torsional vibrations into linear vibrations |
| JP2006138460A (en) * | 2004-11-10 | 2006-06-01 | Koyo Seisakusho:Kk | Mechanism for changing revolving movement into reciprocating linear movement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489726A (en) * | 2018-05-23 | 2018-09-04 | 江苏科信燃气设备有限公司 | Durability detection device for gas pressure regulator, governor diaphragm |
| CN108489726B (en) * | 2018-05-23 | 2024-05-17 | 江苏科信燃气设备有限公司 | Durability detection device for gas pressure regulator membrane |
| CN112554869A (en) * | 2021-02-25 | 2021-03-26 | 中国科学院地质与地球物理研究所 | Hinge support and test equipment |
| CN112554869B (en) * | 2021-02-25 | 2021-07-09 | 中国科学院地质与地球物理研究所 | Hinge support and test equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107389481B (en) | 2023-05-26 |
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