CN207396311U - Change the frequency modulation balancing device of free damping frequency in a kind of low frequency mechanical spectrometer - Google Patents
Change the frequency modulation balancing device of free damping frequency in a kind of low frequency mechanical spectrometer Download PDFInfo
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- CN207396311U CN207396311U CN201721512538.6U CN201721512538U CN207396311U CN 207396311 U CN207396311 U CN 207396311U CN 201721512538 U CN201721512538 U CN 201721512538U CN 207396311 U CN207396311 U CN 207396311U
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- pendulum
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- pendulum bar
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Abstract
The utility model is related to change the frequency modulation balancing device of free damping frequency in a kind of low frequency mechanical spectrometer, the vertical pendulum bar and T-shaped supporting rack that are vertically arranged on the table, the double threaded screw being horizontally set on vertical pendulum bar, the pendulum for being separately positioned on double threaded screw both ends and being connected through a screw thread, the guide roller for being separately positioned on T-shaped supporting rack upper end both sides, the cotton thread for bypassing two guide rollers successively are included；One end of the cotton thread is connected with vertical pendulum bar upper end, and the other end is provided with balance weight corresponding with vertical pendulum bar weight；Multiple small balls corresponding with pendulum weight are additionally provided in the balance weight；The utility model is when carrying out the low frequency damping of free damping measurement material, the pendulum to be varied in weight by rotating pendulum change pendulum to vertical pendulum bar distance or replacement can adjust vibration frequency, it and can be with vertical pendulum bar and the weight balancing of pendulum by increasing balance weight and small ball, so that sample does not stress in vertical direction or the effect of stress less, measurement accuracy is improved.
Description
Technical field
The utility model is related to material tests field, refer in particular to change in a kind of low frequency mechanical spectrometer the tune of free damping frequency
Frequency balancing device.
Background technology
Low frequency mechanoscopy tester is the important instrument of the characteristics such as research material power, electricity, magnetic, can detect the inside of material
Structure, defect and dislocation study the characteristics of motion of crystal boundary or boundary.
At present, the domestic low frequency mechanoscopy tester used is typically voluntarily developed, as SUZHOU VOCATIONAL UNIVERSITY shows
LMA-1 type low frequency mechanoscopy testers were once had developed in 2004 for Testing Technology Study；The tester is using on vertical pendulum bar
Speculum the vibration of sample is converted into the displacement of parallel hot spot, and pass through the silicon light of two pieces of differential connections on photoelectric transformer
The displacement of hot spot is converted into voltage signal by battery, and data acquisition is carried out by host computer, so as to measure the mechanoscopy of sample.
Material low frequency damping measurement is completed in low frequency mechanical spectrometer, i.e., sample, which is erect, places, and one end is fixed, is another
End applies the very little shearing stress of a Xun Huan, and stress is removed at once, is then decayed by sample free vibration, measures its attenuation
Amplitude change with time；Since the damping capacity of free damping measurement material is accurate, free damping measurement material
Damping capacity is widely adopted always, but vibration frequency is in the structure of vertical pendulum bar, material and size and specimen material and size
It cannot be changed after determining, free damping method is caused to have significant limitation in use, and sample is when measuring,
It is required that sample does not stress in vertical direction or the effect of stress less, measurement accuracy otherwise can be influenced.
Utility model content
The utility model aim is provided and changed certainly in a kind of low frequency mechanical spectrometer for overcome the deficiencies in the prior art
By the frequency modulation balancing device of frequency of fadings, when carrying out the low frequency damping of free damping measurement material, vibration frequency can be adjusted, and
Sample can be made not stress or the effect of few stress in vertical direction, improve measurement accuracy, and it is simple in structure, easy to use.
In order to achieve the above objectives, the technical solution adopted in the utility model is：Change freely in a kind of low frequency mechanical spectrometer
The frequency modulation balancing device of frequency of fadings comprising the vertical pendulum bar being movably arranged on vertically on workbench, is horizontally set on vertical pendulum bar
Double threaded screw, be separately positioned on double threaded screw both ends and be connected through a screw thread pendulum, set on the table T-shaped support
Frame, the guide roller for being separately positioned on T-shaped supporting rack upper end both sides, the cotton thread for bypassing two guide rollers successively；The one of the cotton thread
End is connected with vertical pendulum bar upper end, and the other end is provided with balance weight corresponding with vertical pendulum bar weight；It is additionally provided in the balance weight
Multiple small balls corresponding with pendulum weight.
Preferably, the vertical pendulum bar includes the epimere made of aluminium alloy or titanium alloy material, by tungsten-molybdenum alloy material system
Into stage casing and for fix the upper fixture of sample epimere composition；The double threaded screw is arranged on epimere, and is placed in workbench
Top.
Preferably, the pendulum is provided with multigroup, and the weight of multigroup pendulum gradually increases.
Preferably, the both ends of the cotton thread are connected respectively by pressure-pad with vertical pendulum bar and balance weight.
Due to the utilization of above-mentioned technical proposal, the utility model has following advantages compared with prior art：
The frequency modulation balancing device for changing free damping frequency in low frequency mechanical spectrometer described in the utility model is carrying out certainly
By attenuation measurement material low frequency damping when, change pendulum by rotating pendulum and vary in weight to vertical pendulum bar distance or replacement
Pendulum can adjust vibration frequency, and by increase balance weight and small ball can with vertical pendulum bar and the weight balancing of pendulum so that
Sample does not stress in vertical direction or the effect of stress less, improves measurement accuracy.
Description of the drawings
Technical solutions of the utility model are described further below in conjunction with the accompanying drawings：
Attached drawing 1 is the frequency modulation balancing device of change free damping frequency in low frequency mechanical spectrometer described in the utility model
Structure diagram.
Wherein：1st, workbench；2nd, balance weight；3rd, small ball；4th, guide roller；5th, cotton thread；6th, T-shaped supporting rack；7th, double end spiral shell
Bar；8th, pendulum；9th, epimere；10th, magnet steel；11st, speculum；12nd, stage casing；13rd, upper fixture.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the utility model is described in further detail.
Attached drawing 1 is the frequency modulation balancing device for changing free damping frequency in low frequency mechanical spectrometer described in the utility model,
Comprising the vertical pendulum bar being movably arranged on vertically on workbench 1, the double threaded screw 7 being horizontally set on vertical pendulum bar, it is separately positioned on
7 both ends of double threaded screw and be connected through a screw thread pendulum 8, be arranged on workbench 1 T-shaped supporting rack 6, be separately positioned on T-shaped
The guide roller 4 of 6 upper end both sides of supporting rack, the cotton thread 5 for bypassing two guide rollers 4 successively；On one end of the cotton thread 5 and vertical pendulum bar
End connection, the other end are provided with balance weight 2 corresponding with vertical pendulum bar weight；Multiple and pendulum 8 is additionally provided in the balance weight 2
The corresponding small ball 3 of weight；During use：The speculum 11 made of amorphous glass material on vertical pendulum bar can be also installed and generated very
The magnet steel 10 of small shearing stress changes pendulum 8 to the rotary inertia of vertical pendulum bar distance, i.e. change vertical pendulum bar, energy by rotating pendulum 8
A small range adjusts vibration frequency, and when distance is more remote, vibration frequency is smaller, and when distance is nearer, vibration frequency is bigger, and logical
Crossing, which increases balance weight 2 and small ball 3, with vertical pendulum bar and the weight balancing of pendulum 8 sample to be made not stress or lack in vertical direction
The effect of stress.
Further, the vertical pendulum bar includes the epimere 9 made of aluminium alloy or titanium alloy material, by tungsten-molybdenum alloy material system
Into stage casing 12 and form for fixing the upper fixture 13 of sample epimere 9, wherein since aluminium alloy or titanium alloy material are light,
The overall weight of vertical pendulum bar can be reduced, and tungsten-molybdenum alloy material system is more heat-resisting, ensures to deform under 400 degree of high temperature；Institute
It states double threaded screw 7 and is arranged on epimere 9, and be placed in 1 top of workbench.
Further, the pendulum 8 is provided with multigroup, and the weight of multigroup pendulum 8 gradually increases, and is varied in weight by replacing
Pendulum 8 can adjust vibration frequency on a large scale, such as reduce frequency, using larger pendulum 8, increase frequency, using smaller pendulum
Hammer 8.
Further, the both ends of the cotton thread 5 are connected respectively by pressure-pad with vertical pendulum bar and balance weight 2, not only facilitate installation,
And can guarantee that cotton thread 5 and the axis of vertical pendulum bar and balance weight 2 are concentric, improve the degree of balance.
Due to the utilization of above-mentioned technical proposal, the utility model has following advantages compared with prior art：
The frequency modulation balancing device for changing free damping frequency in low frequency mechanical spectrometer described in the utility model is carrying out certainly
By attenuation measurement material low frequency damping when, change pendulum by rotating pendulum and vary in weight to vertical pendulum bar distance or replacement
Pendulum can adjust vibration frequency, and by increase balance weight and small ball can with vertical pendulum bar and the weight balancing of pendulum so that
Sample does not stress in vertical direction or the effect of stress less, improves measurement accuracy.
It the above is only the concrete application example of the utility model, do not form any limit to the scope of protection of the utility model
System.All technical solutions formed using equivalent transformation or equivalent replacement, all fall within the utility model rights protection scope it
It is interior.
Claims (4)
1. change the frequency modulation balancing device of free damping frequency in a kind of low frequency mechanical spectrometer, it is characterised in that：Comprising vertical living
The dynamic vertical pendulum bar set on the table, the double threaded screw being horizontally set on vertical pendulum bar are separately positioned on double threaded screw both ends
And be connected through a screw thread pendulum, T-shaped supporting rack on the table is set, is separately positioned on T-shaped supporting rack upper end both sides
Guide roller, the cotton thread for bypassing two guide rollers successively；One end of the cotton thread is connected with vertical pendulum bar upper end, the other end be provided with
The corresponding balance weight of vertical pendulum bar weight；Multiple small balls corresponding with pendulum weight are additionally provided in the balance weight.
2. change the frequency modulation balancing device of free damping frequency, feature in low frequency mechanical spectrometer according to claim 1
It is：The vertical pendulum bar include the epimere made of aluminium alloy or titanium alloy material, the stage casing made of tungsten-molybdenum alloy material, with
And for fixing the upper fixture of sample epimere composition；The double threaded screw is arranged on epimere, and is placed in above workbench.
3. change the frequency modulation balancing device of free damping frequency in low frequency mechanical spectrometer according to claim 1 or 2, it is special
Sign is：The pendulum is provided with multigroup, and the weight of multigroup pendulum gradually increases.
4. change the frequency modulation balancing device of free damping frequency, feature in low frequency mechanical spectrometer according to claim 3
It is：The both ends of the cotton thread are connected respectively by pressure-pad with vertical pendulum bar and balance weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721512538.6U CN207396311U (en) | 2017-11-14 | 2017-11-14 | Change the frequency modulation balancing device of free damping frequency in a kind of low frequency mechanical spectrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721512538.6U CN207396311U (en) | 2017-11-14 | 2017-11-14 | Change the frequency modulation balancing device of free damping frequency in a kind of low frequency mechanical spectrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207396311U true CN207396311U (en) | 2018-05-22 |
Family
ID=62326273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721512538.6U Expired - Fee Related CN207396311U (en) | 2017-11-14 | 2017-11-14 | Change the frequency modulation balancing device of free damping frequency in a kind of low frequency mechanical spectrometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207396311U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655821A (en) * | 2017-11-14 | 2018-02-02 | 苏州市职业大学 | Change the frequency modulation bascule of free damping frequency in a kind of low frequency mechanical spectrometer |
-
2017
- 2017-11-14 CN CN201721512538.6U patent/CN207396311U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655821A (en) * | 2017-11-14 | 2018-02-02 | 苏州市职业大学 | Change the frequency modulation bascule of free damping frequency in a kind of low frequency mechanical spectrometer |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180522 Termination date: 20201114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |