CN106768981A - A kind of grooved cam impact type alternation torque loading device - Google Patents
A kind of grooved cam impact type alternation torque loading device Download PDFInfo
- Publication number
- CN106768981A CN106768981A CN201710051986.9A CN201710051986A CN106768981A CN 106768981 A CN106768981 A CN 106768981A CN 201710051986 A CN201710051986 A CN 201710051986A CN 106768981 A CN106768981 A CN 106768981A
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- exciting
- cylindrical cam
- brush
- electricity polar
- polar ring
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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
Abstract
Grooved cam impact type 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 cylindrical cam driver and the second cylindrical cam driver are separately mounted to exciting tub bottom surface and on the position at exciting arm of force two ends, positive electricity polar ring and negative electricity polar ring are arranged on and are fixed on the outer tube wall of exciting tub, positive electricity polar ring and negative electricity polar ring are respectively by wire and the first actuating motor and the second actuating motor connection, positive brush and negative brush are all fixed on brush base, positive brush is contacted with positive 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 frame is rotated together with rotating shaft.The alternation tangential force that actuating grooved cam is produced causes alternation torque in circle centre position so that rotating shaft is subject to torsional excitation, realizes that countershaft applies the function of torsional excitation, and 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 grooved cam impact type 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 grooved cam impact type alternation torque loading device, by rotary shaft with swash
The rigidity of frame that shakes is connected, and the vibration arm of force is rigidly connected with exciting frame, and two actuating grooved cams are solid with exciting arm of force end respectively
Connection, respectively 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 being rigidly connected with rotary shaft, rotated together with rotating shaft.The alternation tangential force that actuating grooved cam is produced is caused in circle centre position
Alternation torque so that rotating shaft is subject to torsional excitation.
The present invention reaches above-mentioned purpose by the following technical programs：
Grooved cam impact type 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 cylindrical cam driver, the second cylindrical cam driver, positive brush, negative brush and brush base；First cylinder
Cam driver includes first groove cylindrical cam, the first actuating motor, the first actuating rod member and the first actuated slider, the second circle
Post cam driver includes second groove cylindrical cam, the second actuating motor, the second actuating rod member and the second actuated slider；
The center of the exciting arm of force is fixedly connected with the center of circle of exciting tub bottom surface, and the first cylindrical cam driver and second is justified
Post cam driver is separately mounted to exciting tub bottom surface and on the position at exciting arm of force two ends,
The structure of the first cylindrical cam driver is as follows：First groove cylindrical cam is connected to the first actuating motor
On output shaft, the first actuated slider is arranged on the first actuating rod member while being embedded in the groove of groove cylindrical cam；
The structure of the second cylindrical cam driver is identical with the first cylindrical cam driver；
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 cylindrical cam driver and the second cylindrical cam driver are with the middle heart of the exciting arm of force
It is in a center of symmetry, 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, actuating grooved cam arrangement side
Formula is adjustable, and the exciting force and excited frequency for activating grooved cam are controlled by outside variable-frequency power sources, can be according to experiment parts
Actual conditions are adjusted, and flexibility is strong, low cost, and maintenance is easy, and effect substantially, greatly expands the application of torsional activator
Scope.
Brief description of the drawings
Fig. 1 is the structural representation of grooved cam impact type alternation torque loading device of the present invention.
Fig. 2 is the front view of grooved cam impact type alternation torque loading device of the present invention.
Fig. 3 is the knot of the first cylindrical cam driver of grooved cam impact type alternation torque loading device of the present invention
Structure schematic diagram.
Fig. 4 is the right view of grooved cam impact type alternation torque loading device of the present invention.
Fig. 5 is the enlarged diagram of location A in Fig. 4.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is described further to technical scheme.
Grooved cam impact type alternation torque loading device, including rotating shaft 1, exciting tub 2, the exciting arm of force 3, positive electricity polar ring
5th, negative electricity polar ring 6, the first cylindrical cam driver, the second cylindrical cam driver, positive brush 7, negative brush and brush base 8；
First cylindrical cam driver includes the actuating actuating rod member 15 and first of motor 10, first of first groove cylindrical cam 11, first
Actuated slider 16, the second cylindrical cam driver includes the actuating of second groove cylindrical cam 13, second motor 12, the second actuator lever
Part and the second actuated slider；
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, the first cylindrical cam driver and second
Cylindrical cam driver is separately mounted to the bottom surface of exciting tub 2 and on the position at the two ends of the exciting arm of force 3,
The structure of the first cylindrical cam driver is as follows：First groove cylindrical cam 11 is connected to the first actuating motor
On 10 output shaft, the first actuated slider 16 is arranged on the first actuating rod member 15 while being embedded in groove cylindrical cam
In groove；The structure of the second cylindrical cam driver is identical with the first cylindrical cam driver；
Positive electricity polar ring 5 and negative electricity polar ring 6 are arranged on and are fixed on the outer tube wall of exciting tub 2, positive electricity polar ring 5 and negative electrode
Ring 6 activates motor 12 and is connected by wire 9 with the first actuating motor 10 and second respectively,
Positive brush 7 and negative brush are all fixed on brush base 8, and positive brush 7 is contacted with positive electricity polar ring 5, negative brush with it is negative
Electrode retaining collar 6 is contacted, and positive brush 7 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 exciting arm of force 3, the first cylindrical cam driver and the second cylindrical cam driver are with exciting force
Arm 3 is centrally formed Central Symmetry, 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 12 of motor 10, second is by wire 9 through the hole in exciting tub 2 and positive electrode
Ring 5 is connected with negative electricity polar ring 6, and when torsional excitation device rotates, positive electricity polar ring 5 and negative electricity polar ring 6 are remained and positive brush 7 and born
Brush contact, so as to provide power supply and signal to the first actuating actuating motor 12 of motor 10, second.First cylindrical cam driver
Operation principle be：First rotary electric machine drives first groove cylindrical cam 11 to rotate, because the first actuated slider 16 is embedded in
In the groove of groove cylindrical cam, so the first actuating rod member 15 is moved back and forth under the transmission of the first turning block.Installing
During the parts of the first cylindrical cam driver, it is desirable to which first groove cylindrical cam 11 is coaxial with the first actuating motor 10, first
The parallel axis with first groove cylindrical cam 11 of actuating rod member 15, and require the reciprocating stroke of the first actuating rod member 15
In the range of the exciting arm of force 3 can be carried out effectively clash into cause the exciting arm of force 3 vibrates, and then countershaft 1 generation moment of torsion.The
The operation principle of two cylindrical cam drivers is identical with the operation principle of the first cylindrical cam driver.The exciting frame is circle
Tubular, 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
One end of exciting 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. grooved cam impact type alternation torque loading device, it is characterised in that including rotating shaft, exciting tub, the exciting arm of force, just
Electrode retaining collar, negative electricity polar ring, the first cylindrical cam driver, the second cylindrical cam driver, positive brush, negative brush and brush bottom
Seat；First cylindrical cam driver includes first groove cylindrical cam, the first actuating motor, the first actuating rod member and the first actuating
Sliding block, the second cylindrical cam driver includes that second groove cylindrical cam, the second actuating motor, the second actuating rod member and second are caused
Movable slider；
The center of the exciting arm of force is fixedly connected with the center of circle of exciting tub bottom surface, and the first cylindrical cam driver and the second cylinder are convex
Wheel driver is separately mounted to exciting tub bottom surface and on the position at exciting arm of force two ends,
The structure of the first cylindrical cam driver is as follows：First groove cylindrical cam is connected to the output of the first actuating motor
On axle, the first actuated slider is arranged on the first actuating rod member while being embedded in the groove of groove cylindrical cam；Second
The structure of cylindrical cam driver is identical with the first cylindrical cam driver；
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. grooved cam impact type alternation torque loading device as claimed in claim 1, it is characterised in that the exciting force
Arm, the first cylindrical cam driver and the second cylindrical cam driver are with the Central Symmetry that is centrally formed of the exciting arm of force and then right
Rotating shaft produces moment of torsion.
3. grooved cam impact type alternation torque loading device as claimed in claim 1, it is characterised in that the exciting arm of force
In addition to 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 |
|---|---|---|---|
| CN201710051986.9A CN106768981B (en) | 2017-01-20 | 2017-01-20 | Groove cam impact type alternating torque loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710051986.9A CN106768981B (en) | 2017-01-20 | 2017-01-20 | Groove cam impact type alternating torque loading device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106768981A true CN106768981A (en) | 2017-05-31 |
| CN106768981B CN106768981B (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710051986.9A Active CN106768981B (en) | 2017-01-20 | 2017-01-20 | Groove cam impact type alternating torque loading device |
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| Country | Link |
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| CN (1) | CN106768981B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108044695A (en) * | 2018-01-05 | 2018-05-18 | 南京工程学院 | A kind of mechanical torsional oscillation platform based on space cam |
| CN115791063A (en) * | 2023-02-01 | 2023-03-14 | 胜利油田万和石油工程技术有限责任公司 | Drill fatigue impact damage tester |
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| JP2003126776A (en) * | 2001-10-30 | 2003-05-07 | Toyota Motor Corp | Torsional vibrator |
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| CN206583601U (en) * | 2017-01-20 | 2017-10-24 | 广西大学 | A kind of grooved cam impact type alternation torque loading device |
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| CN102071309A (en) * | 2010-12-31 | 2011-05-25 | 广西大学 | Six-degree-of-freedom vibratory stress relief device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108044695A (en) * | 2018-01-05 | 2018-05-18 | 南京工程学院 | A kind of mechanical torsional oscillation platform based on space cam |
| CN108044695B (en) * | 2018-01-05 | 2019-06-14 | 南京工程学院 | A kind of mechanical torsional oscillation platform based on space cam |
| CN115791063A (en) * | 2023-02-01 | 2023-03-14 | 胜利油田万和石油工程技术有限责任公司 | Drill fatigue impact damage tester |
| CN115791063B (en) * | 2023-02-01 | 2023-05-02 | 胜利油田万和石油工程技术有限责任公司 | Drill fatigue impact damage tester |
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| CN106768981B (en) | 2023-05-09 |
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