CN106802237A - A kind of Leahy formula alternation torque loading device - Google Patents
A kind of Leahy formula alternation torque loading device Download PDFInfo
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- CN106802237A CN106802237A CN201710053570.0A CN201710053570A CN106802237A CN 106802237 A CN106802237 A CN 106802237A CN 201710053570 A CN201710053570 A CN 201710053570A CN 106802237 A CN106802237 A CN 106802237A
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- exciting
- brush
- actuating
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- positive
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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
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
Abstract
A kind of Leahy formula alternation torque loading device, the center of the exciting arm of force is fixedly connected with the center of circle of exciting tub bottom surface, first actuating motor and the second actuating motor are separately fixed at exciting tub bottom surface and on the position at exciting arm of force two ends, first actuating cam is arranged on the first actuating motor, positive electricity polar ring and negative electricity polar ring are arranged on and are fixed on the outer tube wall of exciting tub, positive brush and negative brush are all fixed on brush base, positive brush is contacted with positive electricity polar ring, negative brush is contacted with negative electricity polar ring, positive brush and negative brush are connected to power supply, rotating shaft one end is fixedly connected on the circle centre position of exciting tub bottom surface.Rotating shaft is rotated by power source, and exciting tub is rotated together with rotating shaft, and the alternation tangential force that actuating cam is produced causes alternation torque in circle centre position so that rotating shaft is subject to torsional excitation.Always realize that countershaft applies the function of torsional excitation, simple and compact for structure, good reliability, torsional excitation effect is obvious.
Description
Technical field
The present invention relates to mechanical field, particularly a kind of Leahy formula alternation torque loading device.
Background technology
Many occasions all can carry out torsional oscillation loading using the mode countershaft part of torsional excitation in engineering, and such as engine is bent
The fatigue test of the rotary parts such as axle, steam turbine generator and marine shafting, twisting vibration experiment, carry out model analysis, vibration and ring
Should analyze, to understand the performance of these shafting componentses, simulate its dynamic performance under some operating modes, obtain correlation test number
According to.The residual stress of rotating shaft part is eliminated using the dynamic stress of torsion coupling resonance generation, it is right to be needed in implementation process
Rotating shaft applies torsional excitation, when motor rotation frequency is equal to the difference of natural bending frequency and torsional natural frequency, the torsion of applying
Excitation of shaking is equal to torsional natural frequency, theoretical by Torsion Coupling, and eccentrically weighted shaft can simultaneously excite flexural resonance, flexural resonance and torsion
Turn resonance mutually to strengthen, produce enough dynamic stress.At present use torsional activator have electromagnetic exciter, Pneumatic vibration exciter,
Hydraulic vibration exciter, but these exciter structures are complicated, reliability is not high, expensive, and maintenance cost is high, performance difficulty, difficult
Used with popularizing.
The content of the invention
It is an object of the invention to provide a kind of Leahy formula alternation torque loading device, by rotary shaft and vibration exciter
Frame is rigidly connected, vibration the arm of force be rigidly connected with exciting frame, two actuating cams are connected firmly with exciting arm of force end respectively, respectively with
Centered on the arm of force center of circle, both sides are symmetrically installed.Rotating shaft is rotated by power source, the exciting arm of force and exciting frame due to rotation
Axle is rigidly connected, and is rotated together with rotating shaft.The alternation tangential force that actuating cam is produced causes alternation torque in circle centre position so that turn
Axle is subject to torsional excitation.
The present invention reaches above-mentioned purpose by the following technical programs：
A kind of Leahy formula alternation torque loading device, including it is rotating shaft, exciting tub, the exciting arm of force, positive electricity polar ring, negative
Electrode retaining collar, the first actuating motor, the second actuating motor, the first actuating cam, the second actuating cam, positive brush, negative brush and electricity
Brush base；
The center of the exciting arm of force is fixedly connected with the center of circle of exciting tub bottom surface, and the first actuating motor and second activates motor
It is separately fixed at exciting tub bottom surface and on the position at exciting arm of force two ends, the first actuating cam is arranged on the first actuating
On motor, the second actuating cam is arranged on the second rotary electric machine；
Positive electricity polar ring and negative electricity polar ring are arranged on and are fixed on the outer tube wall of exciting tub, and positive electricity polar ring and negative electricity polar ring divide
Not Tong Guo wire and first actuating motor and second actuating motor connection,
Positive brush and negative brush are all fixed on brush base, and positive brush is contacted with positive electricity polar ring, negative brush and negative electrode
Ring is contacted, and positive brush and negative brush are connected to power supply,
Rotating shaft one end is fixedly connected on the circle centre position of exciting tub bottom surface.
The exciting arm of force, the first actuating motor, the second actuating motor, the first actuating cam and the second actuating cam are in peace
With the Central Symmetry that is centrally formed of the exciting arm of force during dress, and then countershaft produces moment of torsion.
In addition to the junction of center and exciting tub, remaining two end portions is in hanging shape to the exciting arm of force
State.
It is of the invention to have the prominent advantages that：
Vibrator described in the design is made up of component of machine mostly, and reliability is high, simple and compact for structure, easy for installation
Simple and direct, parts intensity is high, is adapted to larger exciting scope, and the exciting arm of force is adjustable, and actuating cam arrangement can
Adjust, the exciting force and excited frequency of actuating cam are controlled by outside variable-frequency power sources, can be according to the actual conditions of experiment parts
Adjusted, flexibility is strong, low cost, maintenance is easy, effect substantially, greatly expands the range of application of torsional activator.
Brief description of the drawings
Fig. 1 is the structural representation of Leahy formula alternation torque loading device of the present invention.
Fig. 2 is the front view of Leahy formula alternation torque loading device of the present invention.
Fig. 3 is the assembling schematic diagram of the first actuating motor of the present invention and the first actuating cam.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is described further to technical scheme.
A kind of Leahy formula alternation torque loading device, including rotating shaft 1, exciting tub 2, the exciting arm of force 3, positive electricity polar ring
6th, the actuating of negative electricity polar ring 10, first motor 4, second actuating motor 5, the first actuating cam 11, the second actuating cam 10, positive brush
8th, negative brush and brush base 7；
The center of the exciting arm of force 3 is fixedly connected with the center of circle of the bottom surface of exciting tub 2, and the first actuating motor 4 and second is activated
Motor 5 is separately fixed at the bottom surface of exciting tub 2 and on the position at the two ends of the exciting arm of force 3, and the first actuating cam 11 is installed
On the first actuating motor 4, the second actuating cam 10 is arranged on the second rotary electric machine；
Positive electricity polar ring 6 and negative electricity polar ring 10 are arranged on and are fixed on the outer tube wall of exciting tub 2, positive electricity polar ring 6 and negative electricity
Polar ring 10 activates motor 5 and is connected by wire 9 with the first actuating motor 4 and second respectively,
Positive brush 8 and negative brush are all fixed on brush base 7, and positive brush 8 is contacted with positive electricity polar ring 6, negative brush with it is negative
Electrode retaining collar 10 is contacted, and positive brush 8 and negative brush are connected to power supply,
The one end of rotating shaft 1 is fixedly connected on the circle centre position of the bottom surface of exciting tub 2.
Further, the actuating of the exciting arm of force 3, first motor 4, second actuating motor 5, the first actuating cam 11 and the
Two actuating cams 10 are when mounted with the Central Symmetry that is centrally formed of the exciting arm of force 3, and then countershaft 1 produces moment of torsion.
Further, the exciting arm of force 3 is in addition to the junction of center and exciting tub 2, remaining two end portions
In vacant state.
During work, rotating shaft 1 is rotated by power source, and motor drives rotating shaft 1 to rotate, and rotating shaft 1 drives the rotation of torsional excitation device
Turn, the power line of the first actuating actuating motor 5 of motor 4, second is by wire 9 through the hole in exciting tub 2 and positive electricity polar ring 6
It is connected with negative electricity polar ring 10, when torsional excitation device rotates, positive electricity polar ring 6 and negative electricity polar ring 10 are remained and positive brush 8 and born
Brush contact, so as to provide power supply and signal to the first actuating actuating motor 5 of motor 4, second.Motor 4 is activated installing first
During with the first actuating cam 11, it is desirable to which when the first actuating motor 4 drives the first actuating cam 11 to rotate, the first actuating cam 11 is grown
The stroke range in footpath can effectively be clashed into the exciting arm of force 3.First actuating cam 11 and the second actuating cam 10 are to exciting
The shock at the two ends of the arm of force 3 causes that the exciting arm of force 3 vibrates, and then countershaft 1 produces moment of torsion.The exciting frame is cylindrical drum
Shape, positive electricity polar ring 6 and negative electricity polar ring 15 are coaxially mounted on the cylindrical outer wall face of cylinder barrel shaped exciting frame, cylinder barrel shaped exciting
One end of frame is provided with bottom surface or two ends and is designed with bottom surface.
The twisting vibration exported by torsional excitation device is applied in the rotating shaft 1 of the rotation of high rigidity, whenThe rotary frequency of rotating shaft 1 RateIt is equal toNatural bending frequencyWithTorsional natural frequencyDifference when, theoretical by torsion coupling resonance, a frequency is equal to reverses solid
The torsional excitation for having frequency can be while have excited flexural resonance, flexural resonance is mutually strengthened with torsional resonance, generation is enough
Dynamic stress eliminates the residual stress of high rigidity rotating shaft 1.
Claims (3)
1. a kind of Leahy formula alternation torque loading device, it is characterised in that including rotating shaft, exciting tub, the exciting arm of force, just
It is electrode retaining collar, negative electricity polar ring, the first actuating motor, the second actuating motor, the first actuating cam, the second actuating cam, positive brush, negative
Brush and brush base；
The center of the exciting arm of force is fixedly connected with the center of circle of exciting tub bottom surface, and the first actuating motor and the second actuating motor are distinguished
It is fixed on exciting tub bottom surface and on the position at exciting arm of force two ends, the first actuating cam is arranged on the first actuating motor
On, the second actuating cam is arranged on the second rotary electric machine；
Positive electricity polar ring and negative electricity polar ring are arranged on and are fixed on the outer tube wall of exciting tub, and positive electricity polar ring and negative electricity polar ring lead to respectively
Wire and the first actuating motor and the second actuating motor connection are crossed,
Positive brush and negative brush are all fixed on brush base, and positive brush is contacted with positive electricity polar ring, and negative brush connects with negative electricity polar ring
Touch, positive brush and negative brush are connected to power supply,
Rotating shaft one end is fixedly connected on the circle centre position of exciting tub bottom surface.
2. Leahy formula alternation torque loading device as claimed in claim 1, it is characterised in that the exciting arm of force,
One actuating motor, the second actuating motor, the first actuating cam and the second actuating cam are when mounted with the middle heart of the exciting arm of force
It is in a center of symmetry, and then countershaft produces moment of torsion.
3. Leahy formula alternation torque loading device as claimed in claim 1, it is characterised in that the exciting arm of force except
Outside the junction of center and exciting tub, remaining two end portions is in vacant state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710053570.0A CN106802237B (en) | 2017-01-20 | 2017-01-20 | Cam impact type alternating torque loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710053570.0A CN106802237B (en) | 2017-01-20 | 2017-01-20 | Cam impact type alternating torque loading device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106802237A true CN106802237A (en) | 2017-06-06 |
| CN106802237B CN106802237B (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710053570.0A Active CN106802237B (en) | 2017-01-20 | 2017-01-20 | Cam impact type alternating torque loading device |
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| CN (1) | CN106802237B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387997A (en) * | 2017-08-04 | 2019-02-26 | 北京空间机电研究所 | A kind of high rigidity lightweight space camera lens barrel and its vibrostability test method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387997A (en) * | 2017-08-04 | 2019-02-26 | 北京空间机电研究所 | A kind of high rigidity lightweight space camera lens barrel and its vibrostability test method |
| CN109387997B (en) * | 2017-08-04 | 2021-03-26 | 北京空间机电研究所 | High-rigidity light space camera lens barrel and anti-vibration stability testing method thereof |
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| Publication number | Publication date |
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| CN106802237B (en) | 2023-05-09 |
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