CN208578912U - A kind of variable element dynamic vibration absorber - Google Patents
A kind of variable element dynamic vibration absorber Download PDFInfo
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- CN208578912U CN208578912U CN201821035406.3U CN201821035406U CN208578912U CN 208578912 U CN208578912 U CN 208578912U CN 201821035406 U CN201821035406 U CN 201821035406U CN 208578912 U CN208578912 U CN 208578912U
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- air spring
- connecting rod
- dynamic vibration
- vibration absorber
- support rod
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 43
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 6
- 238000013016 damping Methods 0.000 abstract description 22
- 230000008450 motivation Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 10
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 8
- 230000004044 response Effects 0.000 description 6
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003475 lamination Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004602 germ cell Anatomy 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Vibration Prevention Devices (AREA)
Abstract
The utility model discloses a kind of variable element dynamic vibration absorbers, including pedestal and the shell being mounted on the base, air spring assembly, connecting rod and support rod are installed in the shell, described air spring assembly one end is fixed on the base, the other end is connected with connecting rod, muti-piece dismountable mass block of stacked arrangement is installed in the connecting rod, the support rod is fixed at the top of the inner wall of shell, and the mass block is arranged and is arranged on support rod and free to slide along the axis direction of support rod.The utility model can be realized motivation of adjustment absorber mass parameter by adjusting the quantity of mass block, it can be realized adjusting dynamic vibration absorber rigidity and damping parameter by adjusting air spring assembly charged pressure size, the purpose that effectively can be realized absorption equipment vibration for the power system device with different vibration characteristics, reduce apparatus body noise has the advantages that structure is simple, easy to process, easy to loading and unloading, design is reasonable, is easy to motivation of adjustment characterisitic parameter.
Description
Technical field
The utility model relates to power system device damping technologies, and in particular to a kind of variable element dynamic vibration absorber.
Background technique
As urban population density and electricity consumption scale are gradually increased, to provide required electric power to resident, some electric power are set
The standby such as installation sites such as transformer and its matched control cabinet are generally closer apart from residential building, because electromagnetism is imitated when equipment is run
Vibration equipment should can be generated, the low-frequency noise of equipment is eventually exhibited as, thus the life and rest for influencing resident are drawn in recent years
The resident of hair complains and also gets worse with dispute.Since this kind of number of devices is numerous, it is low for carrying out thorough upgrading to equipment
Although noise, low vibration equipment can solve problem, but invest huge.If can utility model it is a kind of can be easily installed disassembly and
Low-cost dynamic vibration absorber uses flexible absorbing measure to larger equipment is vibrated, is effectively reduced because vibration equipment causes
Low-frequency noise, undoubtedly a kind of practicable means.Since power system device vibration characteristics is different, preset parameter is moved
Power bump leveller is unable to satisfy the requirement of a wide range of equipment vibration damping, so being directed to different one germlines of vibration equipment characteristic utility model
Columnization, parameter can flexible modulation dynamic vibration absorber, it is only necessary to simple adjustment bump leveller inner body parameter can specific aim
Ground meets the damping requirements of distinct device, undoubtedly has great engineering application value.
Utility model content
The technical problems to be solved in the utility model: in view of the above problems in the prior art, it is dynamic to provide a kind of variable element
Power bump leveller, the utility model can be realized motivation of adjustment absorber mass parameter by adjusting the quantity of mass block, pass through tune
Section air spring assembly charged pressure size, which can be realized, adjusts dynamic vibration absorber rigidity and damping parameter, can be effectively for tool
The purpose for having the power system device of different vibration characteristics to realize absorption equipment vibration, reduce apparatus body noise, has structure
Simply, easy to process, easy to loading and unloading, design rationally, be easy to the advantages of motivation of adjustment characterisitic parameter.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model are as follows:
The utility model provides a kind of variable element dynamic vibration absorber, including pedestal and the shell being mounted on the base, institute
It states and air spring assembly, connecting rod and support rod is installed in shell, described air spring assembly one end is fixed on the base,
The other end is connected with connecting rod, and the dismountable mass block of muti-piece of stacked arrangement, the support rod are equipped in the connecting rod
It is fixed at the top of the inner wall of shell, and the mass block is arranged and is arranged on support rod and along the axis direction of support rod freedom
Sliding.
Preferably, the air spring assembly include the lower cover being sequentially connected, lower snap ring, air spring, upper snap ring and on
Lid is connected and fixed by connector and grips air spring upper end and keep sealing between the lower snap ring and lower cover,
It is connected and fixed between the upper snap ring and upper cover by connector and air spring lower end is gripped and keeps sealing, the sky
The Inflation door core of gas spring is mounted on lower cover or upper lid, and the lower cover is fixed on the base, the upper cover and connecting rod phase
Even.
Preferably, girdle ring is arranged on the air spring.
Preferably, thread segment and locking nut are set in the connecting rod, mass block is clamped to by the locking nut
In connecting rod.
Preferably, the mass block is arranged with respect to the axisymmetrical of connecting rod, the support being fixed at the top of the inner wall of shell
Bar quantity is two, and two support rods are arranged with respect to the axisymmetrical of connecting rod.
Preferably, the bottom of the pedestal is equipped with magnet block.
Compared to the prior art, the utility model have it is following the utility model has the advantages that
1, mass block described in the dynamic vibration absorber that the utility model is proposed is lamination, can be by increasing and decreasing lamination
Quantity achievees the purpose that motivation of adjustment absorber mass parameter；
2, spring described in the dynamic vibration absorber that the utility model is proposed is rubber air spring, can be empty by adjusting
Inside of air spring pressure achievees the purpose that motivation of adjustment bump leveller rigidity and damping parameter；
3, the dynamic vibration absorber carrying magnetic pedestal that the utility model is proposed, can easily angle suction in any direction
It is attached to the magnetic conductivity power equipment outer surface for needing vibration damping, reaches the vibration of absorption equipment ontology, reduces the purpose of noise of equipment.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment.
Fig. 2 is the absorbing mechanical model schematic diagram of the utility model embodiment.
Marginal data: 1, pedestal；2, shell；3, air spring assembly；31, lower cover；32, lower snap ring；33, air spring；
331, Inflation door core；332, girdle ring；34, upper snap ring；35, upper cover；4, connecting rod；41, thread segment；42, locking nut；5, it supports
Bar；6, mass block；7, magnet block
Specific embodiment
As shown in Figure 1, the variable element dynamic vibration absorber of the present embodiment includes pedestal 1 and the shell that is mounted on pedestal 1
2, air spring assembly 3, connecting rod 4 and support rod 5 are installed in shell 2,3 one end of air spring assembly is fixed on pedestal 1
The upper, other end is connected with connecting rod 4, and the dismountable mass block 6 of muti-piece of stacked arrangement is equipped in connecting rod 4, and support rod 5 is solid
At the top of the inner wall of shell 2, and mass block 6 is arranged and is arranged on support rod 5 and along the axis direction free skating of support rod 5
It is dynamic.It can be realized motivation of adjustment absorber mass parameter by adjusting the quantity of mass block 6, by adjusting air spring assembly 3
Charged pressure size, which can be realized, adjusts dynamic vibration absorber rigidity and damping parameter, can be effectively for different vibration characteristics
Power system device realize absorption equipment vibration, reduce apparatus body noise purpose, have structure it is simple, it is easy to process,
It is easy to loading and unloading, design rationally, be easy to the advantages of motivation of adjustment characterisitic parameter.
In the present embodiment, it is in frustum cone structure, the lower mouth inner wall of rotary table and shell 2 is closely matched thereon that pedestal 1, which is aluminium material,
It closes, lower rotary table is connected by embedded screw and the locking of shell 2.
In the present embodiment, shell 2 is cylinder-like structure, under the conditions of the dynamic vibration absorber possible application outdoors, institute
Using its enclosure material as aluminium, shell 2 is lower openings pattern, two tapped through holes that top preset is arranged symmetrically, convenient for branch
The fixation of strut 5.
As shown in Figure 1, air spring assembly 3 includes lower cover 31, lower snap ring 32, air spring 33, the upper card being sequentially connected
Ring 34 and upper cover 35 are connected and fixed by connector between lower snap ring 32 and lower cover 31 and grip 33 upper end of air spring
And sealing is kept, it is connected and fixed between upper snap ring 34 and upper cover 35 by connector and 33 lower end of air spring is gripped and protected
Hold sealing, the Inflation door core 331 of air spring 33 is mounted in upper cover 35, and lower cover 31 is fixed on pedestal 1, upper cover 35 with connect
Bar 4 is connected.In the present embodiment, upper cover 35 is stainless steel material, is in truncated cone-shaped structure, the tapped through hole of setting inflation thereon, screw thread
The Inflation door core 331 that air spring 33 is installed on through-hole passes through Inflation door core using the inflator or inflator shown with pressure
Compressed air is injected air spring 33 by 331, adjusts the rigidity and damping parameter of air spring 33 by adjusting the blowing pressure；
35 lower part of upper cover and upper snap ring 34 are bolted connection so that upper snap ring 34 and the cooperation of upper cover 35, suitable for reading by air spring 33
Locking, prevents internal compressed air from leaking out；Air spring 33 is rubber material, can be to air bullet by adjusting its internal pressure
The rigidity of spring and damping are adjusted, to adjust the rigidity and damping parameter of the dynamic vibration absorber.To enhance air spring
Stability under 33 inflated conditions is arranged with girdle ring 332 on air spring 33.Girdle ring 332 is stainless steel material in the present embodiment,
It is annular in shape.The lower mouth of air spring 33 is locked by lower snap ring 32 and lower cover 31, prevents internal compressed air from leaking out by lower mouth；
The lower snap ring 32 and lower cover 31 are stainless steel material, are fastenedly connected by stainless steel bolt, and lower cover 31 and pedestal 1 be not by
Steel bolt fastening of becoming rusty connection.
In the present embodiment, connecting rod 4 is stainless steel material, and tail portion is external thread structure, can be incited somebody to action by helicitic texture
Mass block 6 is whole to be fixedly connected with the upper cover 35 of air spring assembly 3.
As shown in Figure 1, setting thread segment 41 and locking nut 42 in connecting rod 4, locking nut 42 grips mass block 6
In connecting rod 4.Muti-piece mass block 6 can be combined into the big mass block of cylinder by connecting rod 4 and locking nut 42.
In the present embodiment, support rod 5 is stainless steel material, and support rod 5 is external thread structure close to head, is fixed on shell
In 2 screw top hole, the tail portion of support rod 5 is polished rod structure, is played a supporting role to mass block 6, mass block 6 may only edge
The axial movement of support rod 4.
As shown in Figure 1, mass block 6 is arranged with respect to the axisymmetrical of connecting rod 4, the branch being fixed at the top of the inner wall of shell 2
5 quantity of strut is two, and two support rods 5 are arranged with respect to the axisymmetrical of connecting rod 4.
In the present embodiment, mass block 6 is stainless steel material structure in the form of annular discs, can be according to required for dynamic vibration absorber
Quality is increased and decreased, and plays the role of adjusting quality.There are 2 smooth through-holes on every tablet quality block 6, after cooperating with support rod 4,
The direction of motion of mass block 6 is limited in the axial direction along support rod 4, and dynamic vibration absorber is facilitated to install along any direction.
As shown in Figure 1, the bottom of pedestal 1 is equipped with magnet block 7, the variable element dynamic vibration absorber of the present embodiment is according to attached drawing
After 1 is completed, if you need to which this reality can be realized in use, being adsorbed on the magnetic conductive shell of power system device by magnet block 7
Apply the Fast Installation of the variable element dynamic vibration absorber of example.In the present embodiment, 4 circles of 1 lower part of pedestal setting symmetric arrays
Blind hole, interior 4 circular magnet blocks 7, magnet block 7 and the pedestal 1 of being arranged of blind hole pass through strength glue sticking, the specifically use of magnet block 7
The rubidium magnet of strength.In addition, the variable element dynamic vibration absorber of the present embodiment can also be pasted onto electric system by seccotine
In the non-magnetic shell of equipment.Mass block 6 is stainless steel lamination, can reach motivation of adjustment suction by increasing and decreasing number of laminations
The purpose for device quality of shaking.Air spring 33 is rubber material, can reach motivation of adjustment by adjusting air spring the blowing pressure
Bump leveller rigidity, the purpose of damping.The dynamic vibration absorber that the present embodiment is proposed has magnet block 7, can be with any angle, side
The non-magnetic surface of power system device is pasted onto being adsorbed on power system device magnetic conduction surface, or by seccotine.To needle
To different application objects, three quality, rigidity, damping dynamic parameters for adjusting the dynamic vibration absorber can be realized pair
By the effect of dampening apparatus absorbing, the purpose of equipment noise reduction is finally played.Its structure is simple simultaneously, easy to process, low in cost,
It suits large area to popularize.
Regard the power system device for needing vibration damping as main vibrating system, this implementation being connected on power system device shell
The variable element dynamic vibration absorber of example can regard vibration subsystem as.The purport of dynamic absorber is the vibrational energy main vibrating system
Amount is transferred on subsystem, in the damping link between the energy consumption of transfer and main vibrating system, vibration subsystem, by being set by vibration damping
The mechanical model that the standby variable element dynamic vibration absorber with the present embodiment forms is as shown in Fig. 2, wherein need the electric system of vibration damping
Equipment is that main vibrational system is vibration control object, it is assumed that quality M, rigidity K.The variable element dynamic absorber of the present embodiment
Device can regard a single-freedom vibration system as, if its quality is m, rigidity k, damping be c.Under normal circumstances, power is inhaled
Device quality of shaking is much smaller than main vibrating system mass M.Shown in the kinetics equation such as formula (1) for then having variable element dynamic vibration absorber；
In formula (1), M is the quality of main vibrational system, and K is the rigidity of main vibrational system, and m is the quality for vibrating subsystem, k
It is the damping for vibrating subsystem, x for the rigidity of vibration subsystem, c1For main vibrating system vibratory response, x2It is rung for vibration subsystem
It answers.The effect for considering the simple harmonic quantity external force as shown in formula (2), then respond x1And x2It can indicate as shown in formula (3)；
F (t)=F0sin(ωt) (2)
In formula (2), F (t) is the simple harmonic quantity external force of t moment, F0For the amplitude of simple harmonic quantity external force, ω is the angular frequency of simple harmonic quantity external force
Rate _.
In formula (3), x1For main vibrating system vibratory response, x2To vibrate subsystem responses, X1For main vibrating system vibratory response width
Value, X2To vibrate subsystem response amplitude, ω is the angular frequency of simple harmonic quantity external force, and t is the time.
Response expression formula shown in formula (3) is substituted into formula (1) and derives available formula (4)；
Each parameter is identical as formula (1) and formula (3) in formula (4), and details are not described herein.
It is further derived by shown in main and sub vibrational system amplitude expression formula such as formula (5)；
In formula (4), | X1| it is main vibrating system amplitude, | X2| for remaining each parameter of sub- vibrational system amplitude and formula (1) and formula
(3) identical, details are not described herein.
Parameter: mass ratio μ, damping ratio is introduced for main and sub vibrational system amplitude expression formulaQuiet deformation Xst, forced oscillation
Dynamic frequency ratio λ, natural frequency ratio γn, respectively as shown in formula (6)~formula (10)；
μ=m/M (6)
Xst=F0/K (8)
λ=ω/Ωn (9)
γ=ωn/Ωn (10)
In formula (6)~formula (10), ωnFor sub- vibrational system angular frequency, ΩnFor main vibrational system angular frequency, remaining each parameter
Identical as formula (1) and formula (3), details are not described herein.
Formula (4) arrange under available dynamic vibration absorber effect using formula (6)~formula (10) these parameters, exciting
Shown in amplitude transmitting multiplying power such as formula (11) of the power to main vibrating system；
In formula (11), left side | X1|/XstAmplitude transmitting times of the lower exciting force to main vibrating system is acted on for dynamic vibration absorber
Rate, each parameter in right side are respectively to be directed to shown in formula (6)~formula (10) that main and sub vibrational system amplitude expression formula introduces to join
Number.By formula (11) it is found that exciting force transmits multiplying power and mass ratio, damping ratio and forcing frequency etc. to the amplitude of main vibrating system
Parameter is related.When main vibrating system is constant, it is believed that main vibrating system M, stiffness K immobilize, by adjusting the dynamic absorber
Device, that is, subsystem quality m, rigidity k, c is damped to adjust mass ratio, damping ratio and forcing frequency, it can be achieved that being to main vibration
The adjustment of system vibration amplitude, this is the most essential principle of variable mass bump leveller.In the present embodiment, it is meant that by adjusting power
The quantity of mass block 6 described in inside bump leveller adjusts the quality m of dynamic vibration absorber, by adjusting in air spring assembly 3
Portion's pressure adjusts the rigidity k and damped coefficient c of the dynamic vibration absorber, so that it may to by dampening apparatus ontology play absorbing effect
Fruit, to finally realize the purpose of equipment noise reduction.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (6)
1. a kind of variable element dynamic vibration absorber, it is characterised in that: including pedestal (1) and the shell being mounted on pedestal (1)
(2), air spring assembly (3), connecting rod (4) and support rod (5), the air spring group are installed in the shell (2)
Part (3) one end is fixed on pedestal (1), the other end is connected with connecting rod (4), is equipped with stacked arrangement on the connecting rod (4)
The dismountable mass block of muti-piece (6), the support rod (5) is fixed at the top of the inner wall of shell (2), and the mass block (6)
Be arranged be arranged in it is on support rod (5) and free to slide along the axis direction of support rod (5).
2. variable element dynamic vibration absorber according to claim 1, it is characterised in that: air spring assembly (3) packet
Include the lower cover (31) being sequentially connected, lower snap ring (32), air spring (33), upper snap ring (34) and upper cover (35), the lower snap ring
(32) it is connected and fixed between lower cover (31) by connector and air spring (33) upper end is gripped and keeps sealing, institute
It states to be connected and fixed between upper snap ring (34) and upper cover (35) by connector and air spring (33) lower end is gripped and kept
Sealing, the Inflation door core (331) of the air spring (33) are mounted on upper cover (35), and the lower cover (31) is fixed on pedestal
(1) on, the upper cover (35) is connected with connecting rod (4).
3. variable element dynamic vibration absorber according to claim 2, it is characterised in that: be arranged on the air spring (33)
There are girdle ring (332).
4. variable element dynamic vibration absorber according to claim 1, it is characterised in that: set screw thread on the connecting rod (4)
Mass block (6) is clamped on connecting rod (4) by section (41) and locking nut (42), the locking nut (42).
5. variable element dynamic vibration absorber according to claim 1, it is characterised in that: the mass block (6) is opposite to be connected
The axisymmetrical of bar (4) arranges that support rod (5) quantity being fixed at the top of the inner wall of shell (2) is two, and two support rods
(5) axisymmetrical of opposite connecting rod (4) is arranged.
6. variable element dynamic vibration absorber described according to claim 1~any one of 5, it is characterised in that: the pedestal
(1) bottom is equipped with magnet block (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821035406.3U CN208578912U (en) | 2018-07-02 | 2018-07-02 | A kind of variable element dynamic vibration absorber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821035406.3U CN208578912U (en) | 2018-07-02 | 2018-07-02 | A kind of variable element dynamic vibration absorber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716519A (en) * | 2018-07-02 | 2018-10-30 | 国网湖南省电力有限公司 | A kind of variable element dynamic vibration absorber |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716519A (en) * | 2018-07-02 | 2018-10-30 | 国网湖南省电力有限公司 | A kind of variable element dynamic vibration absorber |
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