CN108663208A - Fatigue test dynamic load loading device - Google Patents
Fatigue test dynamic load loading device Download PDFInfo
- Publication number
- CN108663208A CN108663208A CN201810795841.4A CN201810795841A CN108663208A CN 108663208 A CN108663208 A CN 108663208A CN 201810795841 A CN201810795841 A CN 201810795841A CN 108663208 A CN108663208 A CN 108663208A
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- CN
- China
- Prior art keywords
- dynamic load
- fatigue test
- loading device
- load loading
- test dynamic
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/021—Gearings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technical fields such as the fatigue test of gear, and in particular to a kind of fatigue test dynamic load loading device.The fatigue test dynamic load loading device, including pedestal, turbine box, Balance Iron, electromagnet, testing stand, upper grip, lower collet, connecting rod, crossbeam, the turbine box is set on the pedestal, the upper end of the turbine box connects the Balance Iron, the turbine box is used to adjust the height of the Balance Iron, the upper end of the Balance Iron is provided with the electromagnet, the testing stand is arranged in the top of the electromagnet, magnetic gap regulating device is equipped between the testing stand and the electromagnet, the lower collet is fixed on the testing stand, for fixing test specimen between the lower collet and the upper grip, the upper grip is connected to the crossbeam by connecting rod.
Description
Technical field
The invention belongs to the technical fields such as the fatigue test of gear, and in particular to a kind of fatigue test dynamic load load dress
It sets.
Background technology
It is continuous to the experiment and detection means of engineering goods with the development of mechanical industry and the continuous improvement of scientific research level
More stringent requirements are proposed.
In design of gears, especially for relatively high gear is required in terms of reliability, according to reliability theory pair
The result for the assessment that safety coefficient carries out can not almost reflect the reliability level of gear.It is thus typically necessary to gear
Fatigue test is carried out, to examine the reliability and durability of gear, especially.
The fatigue test of gear, metal material and its component needs to measure gear, metal material and its component in drawing, pressure
Or the fatigue properties under tension and compression alternating load, fracture mechanics, the experiment and detection of crack growth rate etc..It is being equipped with corresponding folder
When tool, fixture can carry out gear life experiment, bar samples drawingand pressing fatigue, plate tensile sample drawingand pressing fatigue, 3 points/four-point bending
Fatigue.
Therefore, the load that how test specimens such as gear, metal material and its component are carried out with dynamic load, becomes this field skill
Art personnel technical barrier urgently to be resolved hurrily.
Invention content
The present invention is directed at least solve the technical problems existing in the prior art, it is proposed that a kind of fatigue test dynamic load
Loading device can improve the problem of the existing technology.
A kind of fatigue test dynamic load loading device, including pedestal, turbine are provided to achieve the purpose of the present invention
Case, Balance Iron, electromagnet, testing stand, upper grip, lower collet, connecting rod, crossbeam, the turbine box are set on the pedestal,
The upper end of the turbine box connects the Balance Iron, and the turbine box is used to adjust the height of the Balance Iron, the Balance Iron
Upper end be provided with the electromagnet, the testing stand, the testing stand and the electromagnet is arranged in the top of the electromagnet
Between be equipped with magnetic gap regulating device, the lower collet is fixed on the testing stand, between the lower collet and the upper grip
For fixing test specimen, the upper grip is connected to the crossbeam by connecting rod.
Preferably, ball screw, stepper motor are provided in the turbine box；The lower end of the ball screw connects turbine
Case, upper end connect the Balance Iron, and the stepper motor drives the ball screw stretching motion with the height of adjustment iron.
Preferably, the junction of the stepper motor and the ball screw is equipped with lubricating cup.
Preferably, further include frequency modulation counterweight for adjusting resonant frequency, the frequency modulation counterweight is symmetrically set in the electromagnetism
The both sides of iron.
Preferably, the lower section of the frequency modulation counterweight is equipped with the weight tray for being used to support extra frequency modulation counterweight.
Preferably, further include for the screw across the frequency modulation counterweight.
Preferably, the magnetic gap regulating device includes turbine and worm screw, and the turbine and the worm screw engage.
Preferably, heel post is equipped between the crossbeam and the pedestal, the heel post is used to support the crossbeam.
Preferably, the predeterminated position of the heel post is equipped with close to switch, and the close switch is for detecting the experiment
Whether platform arrives at predeterminated position, if the testing stand arrive at predeterminated position, control the supply current for reducing the electromagnet or
Supply current described in person's terminal.
Preferably, the heel post is equipped with button box, and the button box is for receiving manual control signal, to control
State stepper motor action.
Preferably, force snesor is equipped between the connecting rod and the crossbeam.
Preferably, the pedestal is fixed on by pedestal spring on the basis of concrete floor.
Preferably, on the pedestal be located at the turbine box both sides be equipped with guide post, the both sides of the turbine box with it is described
Guide post is bonded, and the turbine box moves up and down along the guide post.
The invention has the advantages that：
Fatigue test dynamic load loading device provided by the invention is based on electromagentic resonance by load driving, passes through
Dynamic load is superimposed upon on static load, applies stress to test specimen, dynamic load makes test specimen have fixed frequency, loss of energy
It is very small, open shake it is easy, may be implemented electrification systems search resonance point automatically need not any adjustment；Experiment is loaded without abrasion,
Plant maintenance is simple；The frequency of load is high, and the test period is short, and test period is greatly saved.
Description of the drawings
Fig. 1 is the structural schematic diagram for the fatigue test dynamic load loading device that embodiment of the present invention provides；
Fig. 2 is the vibration fundamental diagram of fatigue test dynamic load loading device in Fig. 1.
Wherein, reference sign：
Pedestal spring 1, pedestal 2, turbine box 3, ball screw 4, travel switch 5, guide post 6, stepper motor 7, lubricating cup 8,
Nut 9, Balance Iron 10, electromagnet 11, button box 12, weight tray 13, frequency modulation counterweight 14, screw 15, turbine 16, worm screw 17,
Testing stand 18, lower collet 19, test specimen 20, upper grip 21, connecting rod 22, force snesor 23, crossbeam 24, big semielliptic spring 25.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
- Fig. 2 is please referred to Fig.1, Fig. 1 is the structure for the fatigue test dynamic load loading device that embodiment of the present invention provides
Schematic diagram；Fig. 2 is the vibration fundamental diagram of fatigue test dynamic load loading device in Fig. 1.
As Figure 1-Figure 2, a kind of fatigue test dynamic load loading device of present invention offer includes pedestal 2, turbine box
3, Balance Iron 10, electromagnet 11, testing stand 18, lower collet 19, upper grip 21, connecting rod 22, crossbeam 24, the turbine box 3 are set
It is placed on the pedestal 2, the upper end of the turbine box 3 connects the Balance Iron 10, and the turbine box 3 is for adjusting the balance
The upper end of the height of iron 10, the Balance Iron 10 is provided with the electromagnet 11, and the examination is arranged in the top of the electromagnet 11
Platform 18 is tested, magnetic gap regulating device is equipped between the testing stand 18 and the electromagnet 11, is fixed on the testing stand 18
Lower collet 19 is stated, for fixing test specimen 20 between the lower collet 19 and the upper grip 21, the upper grip 21 passes through connection
Bar 22 is connected to the crossbeam 24.
As shown in Fig. 2, fatigue test dynamic load loading device provided by the invention uses non-contacting load load side
Formula, directly using electromagnetic force as exciting force, wherein susceptor mass m1, prevailing quality m2, exciting quality m3, additional mass (are adjusted
14 mass of frequency counterweight) m4, support spring, K1, main vibration spring K2, test specimen K3, exciting vibrating spring K4.
Fatigue test dynamic load loading device provided by the invention, load driving are based on electromagentic resonance, are carried by dynamic
Lotus is superimposed upon on static load, applies stress to test specimen 20, dynamic load makes test specimen 20 have fixed frequency, loss of energy non-
It is often small, open shake it is easy, may be implemented electrification systems search resonance point automatically need not any adjustment；Experiment is loaded without abrasion, if
It is standby to safeguard simply；The frequency of load is high, and the test period is short, and test period is greatly saved.
In preferred scheme, ball screw 4, stepper motor 7 are provided in the turbine box 3；Under the ball screw 4
End connection turbine box 3, upper end connect the Balance Iron 10, and the stepper motor 7 drives 4 stretching motion of the ball screw to adjust
Save the height of Balance Iron 10.Ball screw 4 is driven to carry out stretching motion by stepper motor 7, with the height of adjustment iron 10,
The stepless speed regulation of 10 height of Balance Iron may be implemented.
In specific scheme, the upper end of ball screw 4 is set with nut 9, by special spanner can with adjusting nut 9 with
Gap between ball screw 4.
In preferred scheme, the stepper motor 7 and the junction of the ball screw 4 are equipped with lubricating cup 8, pass through lubricating cup 8
Lubricating oil can be added to ball screw 4, ball screw 4 is lubricated.
Further include the frequency modulation counterweight 14 for adjusting resonant frequency, the frequency modulation counterweight 14 is symmetrically set in preferred scheme
In the both sides of the electromagnet 11.Frequency modulation counterweight 14 is asymmetrical load, and frequency modulation counterweight 14 is connected to examination by big semielliptic spring 25
It tests on the main lead screw between platform 18 and electromagnet 11, by frequency modulation counterweight 14 and 25 excitation system of big semielliptic spring, by changing
Running frequency can be changed by becoming the quantity of frequency modulation counterweight 14.
In preferred scheme, the lower section of the frequency modulation counterweight 14 is equipped with the weight tray for being used to support extra frequency modulation counterweight 14
13.Extra frequency modulation counterweight 14 can be placed on weight tray 13.
Further include for the screw 15 across the frequency modulation counterweight 14 in preferred scheme.For the ease of placing frequency modulation weight
Code 14, frequency modulation counterweight 14 can pass through the screw 15, and the screw of different length can be selected according to the quantity of frequency modulation counterweight 14
15。
In preferred scheme, the magnetic gap regulating device includes turbine 16 and worm screw 17, the turbine 16 and the worm screw
17 engagements, the main lead screw between 16 joint test platform 18 of the turbine and electromagnet 11 can rotate snail by special handle
Bar 17, and then the length of main lead screw is adjusted by revolving wormgear 16, to adjust magnetic air gap.
In preferred scheme, heel post is equipped between the crossbeam 24 and the pedestal 2, the heel post is used to support institute
State crossbeam 24.
In further embodiment, the predeterminated position of the heel post is equipped with close to switch, and the close switch is for detecting
Whether the testing stand 18 arrives at predeterminated position, if the testing stand 18 arrives at predeterminated position, controls and reduces the electromagnet
Supply current described in 11 supply current or terminal.Mechanical position limitation protection may be implemented or load occur more than full scale
When the abnormal conditions such as 110% or over-and under-voltage, overcurrent, communication mistake, to realize mandatory protection.
In preferred scheme, the heel post is equipped with button box 12, and the button box 12 manually controls letter for receiving
Number, to control the action of the stepper motor 7.
In preferred scheme, it is equipped with force snesor 23 between the connecting rod 22 and the crossbeam 24, passes through force snesor
23 can detect the pulling force or pressure that the test specimen 20 is born.
In preferred scheme, the pedestal 2 is fixed on by 2 spring 1 of pedestal on the basis of concrete floor.
It is located at 3 both sides of the turbine box in preferred scheme, on the pedestal 2 and is equipped with guide post 6, the turbine box 3
Both sides are bonded with the guide post 6, and the turbine box 3 moves up and down along the guide post 6.Guide post 6 plays guiding and limit
Effect.
In specific implementation mode, the both ends of test specimen 20 are clamped in respectively in the grasping part of upper grip 21 and lower collet 19.
The structure, feature and effect of the present invention, the above institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention is not to limit practical range, every structure according to the present invention shown in drawing
Change made by thinking, or is revised as the equivalent embodiment of equivalent variations, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (13)
1. a kind of fatigue test dynamic load loading device, which is characterized in that including pedestal, turbine box, Balance Iron, electromagnet,
Testing stand, upper grip, lower collet, connecting rod, crossbeam, the turbine box are set on the pedestal, the upper end of the turbine box
Connect the Balance Iron, the turbine box is used to adjust the height of the Balance Iron, and the upper end of the Balance Iron is provided with described
The testing stand is arranged in the top of electromagnet, the electromagnet, and magnetic gap is equipped between the testing stand and the electromagnet and is adjusted
Device is fixed with the lower collet on the testing stand, described for fixing test specimen between the lower collet and the upper grip
Upper grip is connected to the crossbeam by connecting rod.
2. fatigue test dynamic load loading device according to claim 1, which is characterized in that setting in the turbine box
There are ball screw, stepper motor；The lower end of the ball screw connects turbine box, and upper end connects the Balance Iron, the stepping
Motor drives the ball screw stretching motion with the height of adjustment iron.
3. fatigue test dynamic load loading device according to claim 2, which is characterized in that the stepper motor and institute
The junction for stating ball screw is equipped with lubricating cup.
4. fatigue test dynamic load loading device according to claim 1, which is characterized in that further include for adjusting altogether
The frequency modulation counterweight of vibration frequency, the frequency modulation counterweight are symmetrically set in the both sides of the electromagnet.
5. fatigue test dynamic load loading device according to claim 4, which is characterized in that under the frequency modulation counterweight
Side is equipped with the weight tray for being used to support extra frequency modulation counterweight.
6. fatigue test dynamic load loading device according to claim 4, which is characterized in that further include for across institute
State the screw of frequency modulation counterweight.
7. fatigue test dynamic load loading device according to claim 1, which is characterized in that the magnetic gap regulating device
Including turbine and worm screw, the turbine and worm screw engagement.
8. fatigue test dynamic load loading device according to claim 1 or 2, which is characterized in that the crossbeam and institute
It states and is equipped with heel post between pedestal, the heel post is used to support the crossbeam.
9. fatigue test dynamic load loading device according to claim 8, which is characterized in that the heel post is preset
Position is equipped with close to switch, and the close switch is for detecting whether the testing stand arrives at predeterminated position, if the testing stand
Predeterminated position is arrived at, then controls supply current described in the supply current for reducing the electromagnet or terminal.
10. fatigue test dynamic load loading device according to claim 8, which is characterized in that set on the heel post
There is button box, the button box is acted for receiving manual control signal to control the stepper motor.
11. fatigue test dynamic load loading device according to claim 1, which is characterized in that the connecting rod and institute
It states and is equipped with force snesor between crossbeam.
12. fatigue test dynamic load loading device according to claim 1, which is characterized in that the pedestal passes through bottom
Seat spring is fixed on the basis of concrete floor.
13. fatigue test dynamic load loading device according to claim 1, which is characterized in that be located on the pedestal
The turbine box both sides are equipped with guide post, and the both sides of the turbine box are bonded with the guide post, and the turbine box is led described in
It moves up and down to column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810795841.4A CN108663208A (en) | 2018-07-19 | 2018-07-19 | Fatigue test dynamic load loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810795841.4A CN108663208A (en) | 2018-07-19 | 2018-07-19 | Fatigue test dynamic load loading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108663208A true CN108663208A (en) | 2018-10-16 |
Family
ID=63788488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810795841.4A Pending CN108663208A (en) | 2018-07-19 | 2018-07-19 | Fatigue test dynamic load loading device |
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Citations (6)
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|---|---|---|---|---|
| JP2011038817A (en) * | 2009-08-07 | 2011-02-24 | Railway Technical Res Inst | Frequency variable fatigue testing device using electrically operated vibration generator |
| CN204142592U (en) * | 2014-05-12 | 2015-02-04 | 常州市旭坤包装材料有限公司 | Electromagnetic exciting shaking table |
| CN104777054A (en) * | 2015-05-18 | 2015-07-15 | 浙江工业大学 | Method for identifying parameters of resonant fatigue crack propagation test vibration system based on soft sensing technology |
| CN105004620A (en) * | 2015-07-16 | 2015-10-28 | 浙江工业大学 | High-frequency fatigue testing machine dynamic load error compensation method |
| CN206725368U (en) * | 2017-05-16 | 2017-12-08 | 吉林大学 | A kind of high-frequency electrical magnetic-type vibrator |
| CN206997019U (en) * | 2017-06-01 | 2018-02-13 | 江苏磁谷科技股份有限公司 | A kind of electromagnetic actuator |
-
2018
- 2018-07-19 CN CN201810795841.4A patent/CN108663208A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011038817A (en) * | 2009-08-07 | 2011-02-24 | Railway Technical Res Inst | Frequency variable fatigue testing device using electrically operated vibration generator |
| CN204142592U (en) * | 2014-05-12 | 2015-02-04 | 常州市旭坤包装材料有限公司 | Electromagnetic exciting shaking table |
| CN104777054A (en) * | 2015-05-18 | 2015-07-15 | 浙江工业大学 | Method for identifying parameters of resonant fatigue crack propagation test vibration system based on soft sensing technology |
| CN105004620A (en) * | 2015-07-16 | 2015-10-28 | 浙江工业大学 | High-frequency fatigue testing machine dynamic load error compensation method |
| CN206725368U (en) * | 2017-05-16 | 2017-12-08 | 吉林大学 | A kind of high-frequency electrical magnetic-type vibrator |
| CN206997019U (en) * | 2017-06-01 | 2018-02-13 | 江苏磁谷科技股份有限公司 | A kind of electromagnetic actuator |
Non-Patent Citations (2)
| Title |
|---|
| 米亦农: "国外高频疲劳试验机的发展状况", 《材料试验机》 * |
| 郝岷: "《自动化生产线设备维修》", 31 August 2011, 第5-6页 * |
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Application publication date: 20181016 |