CN108547914A - One kind carrying piecewise linearity torsion of bar bump leveller - Google Patents
One kind carrying piecewise linearity torsion of bar bump leveller Download PDFInfo
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- CN108547914A CN108547914A CN201810477014.0A CN201810477014A CN108547914A CN 108547914 A CN108547914 A CN 108547914A CN 201810477014 A CN201810477014 A CN 201810477014A CN 108547914 A CN108547914 A CN 108547914A
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- bar
- piecewise linearity
- support plate
- rigidity
- torsion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
- F16F15/1485—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being unlimited with respect to driving means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention relates to Control Technique of Vibration and Noise fields, and in particular to one kind carrying piecewise linearity torsion of bar bump leveller.Technical solution is as follows：Including support plate, bearing, axle sleeve, trip bolt, connecting rod, piecewise linearity bar and absorbing mass block, the support plate is disc structure, and the support plate is fixedly connected on rotor；The absorbing mass block is disc structure, and the absorbing mass block is equipped with the centre bore arc groove different with four width of rebate differences, arc angles being distributed in uniform circular；The support plate is fixedly connected by the connecting rod with the absorbing mass block；The piecewise linearity bar is the different rigidity bar of four diameters, one end of the piecewise linearity bar is fixedly connected with the support plate, and the other end of the piecewise linearity bar is respectively placed in four arc grooves and keeps that there are gaps with the arc groove angular displacement direction.The configuration of the present invention is simple, vibration suppression bandwidth, significant effect.
Description
Technical field
The present invention relates to Control Technique of Vibration and Noise fields, and in particular to one kind carrying piecewise linearity torsion of bar absorbing
Device.
Background technology
When the torsion driving frequency of rotor-support-foundation system input is close or identical with the intrinsic frequency of rotor-support-foundation system, can cause to turn
The resonance of subsystem, this will directly affect the intensity and service life of rotor-support-foundation system and parts, or even to rotor-support-foundation system
Trouble free service threatens.Big torque is high-power is the trend of rotor-support-foundation system development, the torque with rotor-support-foundation system and power
It is continuously increased, this will increase the torsional oscillation and noise of rotor-support-foundation system.Therefore, become more prominent the problem of Torsional Vibration Control, it is right
The research of Torsional Vibration Control has very important theory significance and engineering application value.
Currently, bump leveller includes two kinds of passive type bump leveller and active bump leveller.The structure of passive bump leveller is simple, but
It is structural parameters to change, so the vibration suppression frequency band of bump leveller is narrow；The vibration suppression frequency range of active vibration absorber is big, but same
When due to complicated, reliability can be declined when complex working condition.
Invention content
The present invention provide it is a kind of carrying piecewise linearity torsion of bar bump leveller, by piecewise linearity bar and absorbing mass block it
Between gap-contact generate non-linear cube of rigidity, and the wideband vibration suppression of passive absorbing, structure are realized using non-linear rigidity
Simply, vibration suppression bandwidth, significant effect.
Technical scheme is as follows：
One kind carry piecewise linearity torsion of bar bump leveller, including support plate, bearing, axle sleeve, trip bolt, connecting rod,
Piecewise linearity bar and absorbing mass block, the support plate are disc structure, and the support plate is fixedly connected on rotor；The suction
The mass block that shakes be disc structure, the absorbing mass block be equipped with centre bore and in uniform circular distribution four width of rebate not
Arc groove same, arc angle is different；The bearing is mounted in the centre bore and is sleeved on rotor, and the axle sleeve passes through
Trip bolt, which is mounted on the rotor, positions the bearing；The support plate passes through the connecting rod and the absorbing quality
Block is fixedly connected；The piecewise linearity bar is the different rigidity bar of four diameters, one end and the branch of the piecewise linearity bar
Support plate is fixedly connected, and the other end of the piecewise linearity bar is respectively placed in four arc grooves and keeps and the circular arc
There are gaps for groove angle direction of displacement.
Described carries piecewise linearity torsion of bar bump leveller, wherein the rigidity of the piecewise linearity bar and its cross-sectional area
Square directly proportional, the big piecewise linearity bar correspondence of rigidity is positioned in the arc groove that width of rebate is big, arc angle is big, described point
The gap of section linear bar and the arc groove increases with the rigidity of the piecewise linearity bar and is increased.
Described carries piecewise linearity torsion of bar bump leveller, and preferred embodiment is, during reversing absorbing, four institutes
The obstructions vibration rigidity for stating the generation of piecewise linearity bar piecewise linearly increases with the increase of angular displacement, and overall fit is in cube rigid
Degree.
Beneficial effects of the present invention are：
1. the present apparatus is simple in structure, the present apparatus is mainly formed with simple rod piece with disk, and overall volume is small, and structure is tight
It gathers.
2. present apparatus vibration suppression bandwidth, the present apparatus is generated non-thread by the gap between piecewise linearity bar and absorbing mass block
Property rigidity, realizes wideband vibration suppression, can effectively inhibit rotor-support-foundation system in wide band twisting vibration.
3. present apparatus reliability is high, the present apparatus is relative to active control bump leveller, under complicated working condition, structure
Simply, not error-prone.
4. the present apparatus is easy to use, can be directly connected with rotor-support-foundation system by bearing, support plate.
5. present apparatus significant effect can effectively expand since the piecewise linearity rigidity of device is similar to non-linear rigidity
Operating frequency range, so shock attenuation result is notable.
Description of the drawings
Fig. 1 is with piecewise linearity torsion of bar bump leveller structure chart；
Fig. 2 is with piecewise linearity torsion of bar bump leveller working state schematic representation；
Fig. 3 is absorbing mass block structure figure；
Fig. 4 is the kinetic model figure with piecewise linearity torsion of bar bump leveller；
Fig. 5 is piecewise linearity rigidity and cube rigidity comparison diagram；
Fig. 6 is the piecewise linearity fundamental diagram with piecewise linearity torsion of bar bump leveller；
Fig. 7 is that whether there is or not piecewise linearity torsion of bar bump leveller effect contrast figures.
In figure：1 support plate, 2 bearings, 3 axle sleeves, 4 trip bolts, 5 absorbing mass blocks, 6 connecting rods, 7 piecewise linearity bars, 8
Rotor, 9, with piecewise linearity torsion of bar bump leveller, 10 turntables, 11 motors, 12 testing stands, 13 arc grooves.
Specific implementation mode
As shown in Figs. 1-3, a kind of to carry piecewise linearity torsion of bar bump leveller including support plate 1, bearing 2, axle sleeve 3, tight
Gu screw 4, connecting rod 6, piecewise linearity bar 7 and absorbing mass block 5, the support plate 1 is disc structure, and the support plate 1 is solid
Surely it is connected on rotor 8；The absorbing mass block 5 is disc structure, and the absorbing mass block 5 is equipped with centre bore and in nicely rounded
The different arc groove 13 of all four width of rebate differences, arc angles being distributed；The bearing 2 is mounted in the centre bore simultaneously
It is sleeved on rotor 8, the axle sleeve 3 is mounted on rotor 8 by trip bolt 4 and is positioned to the bearing 2；The support
Disk 1 is fixedly connected by the connecting rod 6 with the absorbing mass block 5；The piecewise linearity bar 7 is different rigid of four diameters
Bar is spent, one end of the piecewise linearity bar 7 is fixedly connected with the support plate 1, and the other end of the piecewise linearity bar 7 is put respectively
It is placed in four arc grooves 13 and keeps that there are gaps with 13 angular displacement direction of the arc groove；The piecewise linearity bar 7
Rigidity it is directly proportional to its cross-sectional area square, the big correspondence of piecewise linearity bar 7 of rigidity is positioned over that width of rebate is big, arc angle
In big arc groove 13, the piecewise linearity bar 7 and the gap of the arc groove 13 increase with the rigidity of the piecewise linearity bar 7
And increase；During reversing absorbing, obstructions vibration rigidity that four piecewise linearity bars 7 generate with the increase of angular displacement and
Piecewise linearly increase, overall fit is in cube rigidity.
As shown in figure 4, its dynamic differential equation is represented by：
Wherein θ is angular displacement,I1Indicate rotor
The rotary inertia of system, I2Indicate the rotary inertia of absorbing mass block 5, c1It is rotor-support-foundation system damping, c2It is bump leveller damping, k1
It is rotor-support-foundation system torsional rigidity, k2It is the non-linear rigidity that piecewise linearity bar 7 is formed, M is the driving torque that rotor generates.
As shown in figure 5, k2With angular displacement2Variation relation.Each spring indicates that piecewise linearity bar is being reversed with absorbing mass block
The rigidity generated in the process.When reverse bump leveller angular displacement it is smaller when, only the piecewise linearity bar of diameter minimum after torsion and
Absorbing mass block 5 contacts, at this time k2It is minimum；As angular displacement increases, larger piecewise linearity bar after torsion with absorbing quality
Block 5 contacts, at this time k2For the sum of two bar rigidity；As angular displacement further increases, the piecewise linearity bar of larger diameter is through torsion
It is contacted afterwards with absorbing mass block 5, at this time k2For the sum of three bar rigidity；When angular displacement is very big, the piecewise linearity of maximum gauge
Bar contacts after torsion with absorbing mass block 5, at this time k2For the sum of four bar rigidity.
In twist process, piecewise linearity rigidity such as formula (2), global approximation is in a cube rigidity.Therefore, angular displacement and obstruction
The moment conditions approximate fits of twisting vibration are at such as formula (3).
Shown in relationship such as formula (2) between the power and angular displacement of piecewise linearity, wherein θ is angular displacement, M1To hinder to reverse
The torque of vibration, k are stiffness coefficient.
M1=k θ3 (3)
As shown in fig. 6, piecewise linearity and non-linear two curves by contrast, from the almost phase of two curves in terms of fitting angle
Together, it therefore piecewise linearity rigidity can be regarded as to cube rigidity calculates.
The piecewise linearity structure that the present invention uses has same inhibition of vibration instead of non-linear cube of stiffness structure.
As shown in fig. 7, being distributed in 90 degree between arc groove, width of rebate is respectively 7.52mm, 8.90mm, 9.89mm, 10.64mm, right
The arc angle is answered to be I1=1kgm2, I2=0.15kgm2, c2=
3Ns/m, c1=6Ns/m k1=7.64 × 104N/m, k2For above-mentioned piecewise linearity rigidity when, can be significantly from figure
Go out, the maximum twist angle of main system 0.25mrad is reduced to by 2.7mrad or so hereinafter, and vibration suppression bandwidth, fully say
The present invention is illustrated and carries the feasibility of piecewise linearity torsion of bar bump leveller in practical applications.
The above, only preferred embodiment of the invention, but not have any restrictions to the present invention, it is every according to this
Inventive technique refers to any simple modification, the change made to above-described embodiment, still falls within the protection domain of the technology of the present invention
It is interior.
Claims (3)
1. one kind carrying piecewise linearity torsion of bar bump leveller, which is characterized in that including support plate, bearing, axle sleeve, fastening spiral shell
Nail, connecting rod, piecewise linearity bar and absorbing mass block, the support plate are disc structure, and the support plate, which is fixedly connected on, to be turned
On son；The absorbing mass block be disc structure, the absorbing mass block be equipped with centre bore and in uniform circular distribution four
The arc groove that width of rebate is different, arc angle is different；The bearing is mounted in the centre bore and is sleeved on rotor, institute
It states axle sleeve and is mounted on the rotor by trip bolt and the bearing is positioned；The support plate passes through the connecting rod and institute
Absorbing mass block is stated to be fixedly connected；The piecewise linearity bar is the different rigidity bar of four diameters, the one of the piecewise linearity bar
End is fixedly connected with the support plate, and the other end of the piecewise linearity bar is respectively placed in four arc grooves and keeps
There are gaps with the arc groove angular displacement direction.
2. according to claim 1 carry piecewise linearity torsion of bar bump leveller, which is characterized in that the piecewise linearity bar
Rigidity it is directly proportional to its cross-sectional area square, the big piecewise linearity bar correspondence of rigidity is positioned over that width of rebate is big, arc angle
In big arc groove, the gap of the piecewise linearity bar and the arc groove increases with the rigidity of the piecewise linearity bar and is increased
Greatly.
3. according to claim 1 carry piecewise linearity torsion of bar bump leveller, which is characterized in that in torsion absorbing process
In, the obstruction vibration rigidity that four piecewise linearity bars generate piecewise linearly increases with the increase of angular displacement, whole quasi-
It is in cube rigidity to close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810477014.0A CN108547914B (en) | 2018-05-18 | 2018-05-18 | One kind having piecewise linearity torsion of bar bump leveller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810477014.0A CN108547914B (en) | 2018-05-18 | 2018-05-18 | One kind having piecewise linearity torsion of bar bump leveller |
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| Publication Number | Publication Date |
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| CN108547914A true CN108547914A (en) | 2018-09-18 |
| CN108547914B CN108547914B (en) | 2019-10-15 |
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| CN201810477014.0A Expired - Fee Related CN108547914B (en) | 2018-05-18 | 2018-05-18 | One kind having piecewise linearity torsion of bar bump leveller |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610302A (en) * | 2019-02-01 | 2019-04-12 | 青岛理工大学 | Combined type bridge Torsional Vibration Control system |
| CN110230661A (en) * | 2019-06-12 | 2019-09-13 | 东北大学 | A kind of nonlinear energy trap with piecewise linearity beam applied to rotor-support-foundation system |
| CN114458732A (en) * | 2022-02-16 | 2022-05-10 | 东北大学 | Gap type nonlinear energy trap applied to torsional vibration suppression of rotor system |
| CN114465443A (en) * | 2022-02-16 | 2022-05-10 | 东北大学 | Permanent magnet nonlinear energy trap for restraining torsional vibration based on magnetic repulsion principle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02248550A (en) * | 1989-03-23 | 1990-10-04 | Nitta Ind Corp | Device for exempting lightweight building from vibration |
| CN103742591A (en) * | 2013-12-25 | 2014-04-23 | 北京化工大学 | Rotor adaptive continuous frequency shifting tuned mass damper (TMD) for rotary machinery |
| CN103776586A (en) * | 2014-01-13 | 2014-05-07 | 西安昆仑汽车电子有限公司 | Method for reducing effects of external vibration on dynamic-repeated-measurement precision of rotor dynamic balance measurement system |
| CN103792057A (en) * | 2014-03-10 | 2014-05-14 | 西安交通大学 | Adjustable gap nonlinear research test bed and use method thereof |
| CN104819233A (en) * | 2015-04-03 | 2015-08-05 | 北京航空航天大学 | Two-freedom-degree electric eddy current tuning passive damper |
-
2018
- 2018-05-18 CN CN201810477014.0A patent/CN108547914B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02248550A (en) * | 1989-03-23 | 1990-10-04 | Nitta Ind Corp | Device for exempting lightweight building from vibration |
| CN103742591A (en) * | 2013-12-25 | 2014-04-23 | 北京化工大学 | Rotor adaptive continuous frequency shifting tuned mass damper (TMD) for rotary machinery |
| CN103776586A (en) * | 2014-01-13 | 2014-05-07 | 西安昆仑汽车电子有限公司 | Method for reducing effects of external vibration on dynamic-repeated-measurement precision of rotor dynamic balance measurement system |
| CN103792057A (en) * | 2014-03-10 | 2014-05-14 | 西安交通大学 | Adjustable gap nonlinear research test bed and use method thereof |
| CN104819233A (en) * | 2015-04-03 | 2015-08-05 | 北京航空航天大学 | Two-freedom-degree electric eddy current tuning passive damper |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109610302A (en) * | 2019-02-01 | 2019-04-12 | 青岛理工大学 | Combined type bridge Torsional Vibration Control system |
| CN109610302B (en) * | 2019-02-01 | 2023-09-29 | 青岛理工大学 | Composite bridge torsional vibration control system |
| CN110230661A (en) * | 2019-06-12 | 2019-09-13 | 东北大学 | A kind of nonlinear energy trap with piecewise linearity beam applied to rotor-support-foundation system |
| CN110230661B (en) * | 2019-06-12 | 2021-05-28 | 东北大学 | Nonlinear energy trap with piecewise linear beam applied to rotor system |
| CN114458732A (en) * | 2022-02-16 | 2022-05-10 | 东北大学 | Gap type nonlinear energy trap applied to torsional vibration suppression of rotor system |
| CN114465443A (en) * | 2022-02-16 | 2022-05-10 | 东北大学 | Permanent magnet nonlinear energy trap for restraining torsional vibration based on magnetic repulsion principle |
| CN114465443B (en) * | 2022-02-16 | 2023-12-22 | 东北大学 | Permanent magnet nonlinear energy trap for suppressing torsional vibration based on magnetic repulsion principle |
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| CN108547914B (en) | 2019-10-15 |
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Granted publication date: 20191015 |