CN220791881U - Modularized second-order eddy current damper for fan - Google Patents
Modularized second-order eddy current damper for fan Download PDFInfo
- Publication number
- CN220791881U CN220791881U CN202322045630.8U CN202322045630U CN220791881U CN 220791881 U CN220791881 U CN 220791881U CN 202322045630 U CN202322045630 U CN 202322045630U CN 220791881 U CN220791881 U CN 220791881U
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- eddy current
- order eddy
- damper
- current damper
- order
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- 238000013016 damping Methods 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 10
- 239000011159 matrix material Substances 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000004020 conductor Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The utility model discloses a modularized second-order eddy current damper for a fan, which comprises a loop chain, wherein the lower end of the loop chain is connected with a vibrator, the loop chain and the vibrator form a simple pendulum structure, magnetic steel is arranged at the bottom of the vibrator, the modularized second-order eddy current damper also comprises a damping plate, the magnetic steel moves relative to the damping plate to generate an eddy current damping effect, and the second-order eddy current damper also comprises an adjusting mechanism for adjusting damping force and/or frequency. The application also provides a plurality of second-order eddy current dampers which are arranged in the tower through a ring or a matrix according to the application of the second-order eddy current dampers in fan modularization. The utility model can damp vibration for frequencies of fans in various rotating speed ranges through wider damping frequency bands formed by a plurality of groups of modularized second-order eddy current dampers with fixed differences.
Description
Technical Field
The utility model relates to the technical field of fan vibration reduction, in particular to a modularized second-order eddy current damper for a fan.
Background
The second-order damper for the fan is mainly divided into a liquid damper and a metal eddy current damper, the damping effect of the second-order damping metal eddy current damper of the fan is far greater than that of the liquid damper, the mass of the metal eddy current damper is generally about one ton to two tons, and the single metal eddy current damper is large in overall dimension and can only be installed in the installation process of the fan, so that the metal eddy current damper is difficult to install due to the fact that the material transport hole is too small for an installed tower, and the problem is solved by the modularized second-order eddy current damper for the fan.
In addition, the metal eddy current damper existing in the market only absorbs vibration at a specific frequency, but the vibration frequency in the power generation process of the fan is not completely fixed, the frequency is related to the rotating speed of the fan impeller, and when the rotating speed of the impeller in the power generation process of the fan changes, the vibration frequency changes in a certain range, so that the vibration absorption effect is greatly reduced when the frequency of the single metal eddy current damper does not completely correspond to the frequency of the fan.
Disclosure of Invention
Aiming at the problems existing in the prior art, the modularized second-order eddy current damper for the fan is applied to second-order vibration reduction of an installed fan, the requirements on hoisting and installation are reduced, the second-order vibration acceleration of the installed fan is reduced, and therefore vortex-induced vibration resistance of the fan is effectively enhanced.
The technical scheme for realizing the aim of the utility model is as follows: the utility model provides a fan is with modularization second order electric vortex damper, second order electric vortex damper includes the loop chain, the loop chain lower extreme is connected with the oscillator, the single pendulum structure is constituteed with the oscillator to the loop chain, and the magnet steel is installed to the oscillator bottom, still includes the damping plate, the magnet steel is in order to produce electric vortex damping effect for the damping plate motion, second order electric vortex damper still includes the adjustment mechanism who is used for adjusting damping force and/or frequency.
Preferably, the adjusting mechanism comprises an adjusting plate and a top plate, the loop chain penetrates through the hanging point pin shaft to be arranged on the adjusting plate, a central hole for the loop chain to pass through is formed in the top plate, and a tightening bolt and a tension bolt for adjusting the height of the adjusting plate are arranged between the adjusting plate and the top plate.
Preferably, the center hole is provided with a chain swing length limiting mechanism for limiting the swing angle of the ring chain.
Preferably, the chain swing length limiting mechanism is a spacer.
Preferably, the second-order eddy current damper further comprises an outer cylinder, the top plate and the bottom plate form a whole damper frame structure, the damping plate is arranged on the bottom plate, and the vibrator is arranged in the outer cylinder.
Preferably, the vibrator comprises a mass block connecting rod connected with the lower end of the endless chain, and further comprises at least one mass block, and the mass block connecting rod penetrates through the at least one mass block.
Preferably, the vibrator is provided with a limiting ring for limiting the collision between the vibrator and the outer cylinder.
Preferably, a plurality of the second-order eddy current dampers are arranged in the tower through a ring.
Preferably, a plurality of the second-order eddy current dampers are arranged in the tower through a matrix.
Preferably, a plurality of the second-order eddy current dampers are connected in a matrix through damper connecting frames.
By adopting the technical scheme, the utility model has the following beneficial effects: (1) The fan is subjected to vibration reduction aiming at the frequencies of the fan in each rotating speed range through a wider vibration reduction frequency band formed by a plurality of groups of modularized second-order eddy current dampers with fixed differences in frequency.
(2) The modularized second-order eddy current damper for the fan is small in size, and under the condition that the damping frequency of the fan is met, the unidirectional maximum size is within 200mm-500mm, and the modularized second-order eddy current damper can pass through a hanging hole and a ladder hole of the installed fan. And basic structure hangs the oscillator for single iron chain, through the angle rotation between the iron chain links for the oscillator provides the swing inclination, this kind of mode has 2 times even bigger motion angle for pendulum rod formula attenuator, has increased the shock attenuation effect to the fan by a wide margin, a fan is with modularization second order electric vortex damper possesses reliable connection and regulation mode, bolt top draws the structure can adjust in order to adjust the attenuator damping force to the magnet steel clearance, increase iron chain pendulum length limiting mechanism simultaneously and can select to adjust or fix the attenuator frequency, all adjustment mechanism for a fan is external with modularization second order electric vortex damper, very strong convenience is provided.
(3) The installation scheme of the modularized second-order eddy current damper for the fan is mainly divided into matrix arrangement of the modularized second-order eddy current damper for the fan and annular arrangement of the modularized second-order eddy current damper for the fan in the fan. For the wideband vibration reduction scheme of the modularized second-order eddy current damper for the fan, the vibration frequency of the fan which is more frequently occurred is used as a standard, a certain range is taken up and down, and each damper in the range is designed and installed according to a certain frequency difference, so that a wideband vibration reduction mode can be achieved.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
FIG. 1 is a schematic diagram of a second-order eddy current damper according to the present utility model;
FIG. 2 is a top view of FIG. 1 in accordance with the present utility model;
FIG. 3 is a second order eddy current damper tower annular layout;
fig. 4 is a second order eddy current damper tower matrix arrangement.
Detailed Description
Example 1
Referring to fig. 1 to 4, the modularized second-order eddy current damper for a fan of the present embodiment, the second-order eddy current damper 21 includes a loop chain 1, the lower end of the loop chain is connected with a vibrator, the loop chain and the vibrator form a single pendulum structure, a magnetic steel 8 is installed at the bottom of the vibrator, the damper further includes a damping plate 9, the magnetic steel moves relative to the damping plate to generate an eddy current damping effect, and the second-order eddy current damper further includes an adjusting mechanism for adjusting damping force and/or frequency; the adjusting mechanism comprises an adjusting plate 3 and a top plate 6, the loop chain penetrates through the hanging point pin shaft 2 to be arranged on the adjusting plate, a central hole for the loop chain to pass through is formed in the top plate, and a tightening bolt 4 and a tightening bolt 5 for adjusting the height of the adjusting plate are arranged between the adjusting plate and the top plate. The central hole is provided with an iron chain swing length limiting mechanism for limiting the swing angle of the ring chain; the iron chain swing length limiting mechanism is a gasket.
As shown in fig. 1, a single pendulum structure is formed on a loop chain 1 and a suspended vibrator,
the loop chain 1 and the hanging point pin shaft 2 penetrating into the loop chain are fixed on the adjusting plate 3, the lower end of the loop chain 1 is connected with the mass block connecting rod 7, the mass block connecting rod 7 penetrates through a plurality of mass blocks to form a vibrator, and the bottom of the vibrator is provided with magnetic steel 8.
When the second-order vibration of the fan is transmitted to the damper, the vibrator is excited to swing, and at the moment, the magnetic steel fixed on the mass block connecting rod 7 moves relative to the damping plate 9 fixed on the bottom plate 10, so that an eddy current damping effect is generated, and a damping effect is generated.
A damping unit of a modularized second-order eddy current damper for a fan utilizes an eddy current damping technology, generates relative motion through a conductor plate arranged in the damper and fixed magnetic steel, generates eddy current in the conductor plate when the conductor plate in a local magnetic field cuts magnetic lines, interacts with an original magnetic field to generate a force for preventing the relative motion of the conductor plate and the magnetic field, and simultaneously converts kinetic energy obtained by the conductor plate into heat energy through the resistance effect of the conductor plate to dissipate the heat energy, so that the vibration speed of a mass block is limited, and the vibration acceleration of a tower cylinder is reduced. The electric vortex damper does not depend on mechanical friction energy consumption, has no problems of leakage and sealing of working fluid, has the advantages of high reliability, good durability, relatively simple structure and the like, and is particularly suitable for working environments requiring long fatigue life and difficult maintenance.
The second-order eddy current damper further comprises an outer cylinder 11, the outer cylinder, the top plate 6 and the bottom plate 10 form a whole damper frame structure, the whole damper frame structure plays a role in supporting and protecting, the damping plate is arranged on the bottom plate, and the vibrator is arranged in the outer cylinder.
The vibrator comprises a mass block connecting rod 7 connected with the lower end of the loop chain and at least one mass block, and the mass block connecting rod penetrates through the at least one mass block. And the vibrator is provided with a limiting ring 12 for limiting the collision between the vibrator and the outer cylinder.
The application provides a plurality of second-order eddy current dampers 21 which are arranged in a tower barrel in a ring shape according to the application of the second-order eddy current dampers to fan modularization. A tower ladder 23, a cable hole 22 and the like are arranged in the tower.
In parallel, in fan modular applications, a plurality of said second-order eddy current dampers 21 may also be arranged in a matrix within the tower 31; a plurality of the second-order eddy current dampers are connected in a matrix by a damper connecting frame 32.
In the implementation process, when the damper frequency is adjusted, the height of the adjusting plate 3 is adjusted through the jacking bolts 4 and the tension bolts 5 to adjust the leakage length of the loop chain 1, and then a gasket for limiting the swinging angle of the loop chain 1 is additionally arranged at the center of the top plate 6 to adjust the damper frequency.
When the damper is adjusted, the height of the adjusting plate 3 is adjusted through the jacking bolts 4 and the tension bolts 5, so that the gap between the magnetic steel 8 and the damping plate 9 is adjusted to adjust the damping size of the damper.
The frequency adjustment of the frequency band width of the damper mainly aims at the upper limit and the lower limit of a certain frequency vibration range of the fan to serve as frequency band boundaries, and then the frequency of a certain damper is divided according to the total number of the dampers. Assuming that the fan needs damping frequency to be f, and the frequency range of the fan in the actual running process is f-c; f+c ], if the number of installed dampers is n, the damper frequency adjustment is from low to high:
as shown in figure 3 for the annular layout of the damper tower,
the arrangement mode is arranged on the section edge of the tower barrel in an annular mode, has low bearing requirements on the platform, is convenient to maintain, and is suitable for the arrangement of most modularized dampers.
FIG. 4 is a diagram illustrating a damper tower matrix arrangement;
according to the arrangement mode, the connecting flange is added on the damper, the upper support and the lower support of each damper are connected with the adjacent damper or the tower through bolts, the arrangement mode is used for avoiding components of certain platforms, and the modular dampers are arranged in a concentrated mode, so that the horizontal arrangement space can be greatly reduced.
While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.
Claims (10)
1. A modularized second-order eddy current damper for a fan is characterized in that: the second-order eddy current damper (21) comprises a loop chain (1), the lower end of the loop chain is connected with a vibrator, the loop chain and the vibrator form a simple pendulum structure, magnetic steel (8) is installed at the bottom of the vibrator, the second-order eddy current damper further comprises a damping plate (9), the magnetic steel moves relative to the damping plate to generate an eddy current damping effect, and the second-order eddy current damper further comprises an adjusting mechanism for adjusting damping force and/or frequency.
2. The modular second-order eddy current damper for fans of claim 1, wherein: the adjusting mechanism comprises an adjusting plate (3) and a top plate (6), the loop chain penetrates through the hanging point pin shaft (2) to be arranged on the adjusting plate, a central hole for the loop chain to pass through is formed in the top plate, and a tightening bolt (4) and a tension bolt (5) for adjusting the height of the adjusting plate are arranged between the adjusting plate and the top plate.
3. The modular second-order eddy current damper for fans of claim 2, wherein: and the central hole is provided with an iron chain swing length limiting mechanism for limiting the swing angle of the ring chain.
4. A modular second order eddy current damper for a fan as claimed in claim 3, wherein: the iron chain swing length limiting mechanism is a gasket.
5. The modular second-order eddy current damper for fans of claim 2, wherein: the second-order eddy current damper further comprises an outer cylinder (11), the outer cylinder, the top plate (6) and the bottom plate (10) form a whole damper frame structure, the damping plate is arranged on the bottom plate, and the vibrator is arranged in the outer cylinder.
6. The modular second-order eddy current damper for fans of claim 5, wherein: the vibrator comprises a mass block connecting rod (7) connected with the lower end of the loop chain, and further comprises at least one mass block, wherein the mass block connecting rod penetrates through the at least one mass block.
7. The modular second-order eddy current damper for fans of claim 6, wherein: and the vibrator is provided with a limiting ring (12) for limiting the vibrator when colliding with the outer cylinder.
8. The modular second order eddy current damper for a fan according to any one of claims 1-7, wherein: a plurality of second-order eddy current dampers (21) are arranged in a tower through a ring shape.
9. The modular second order eddy current damper for a fan according to any one of claims 1-7, wherein: a plurality of second-order eddy current dampers are arranged in a tower (31) through a matrix.
10. The modular second-order eddy current damper for fans of claim 9, wherein: the second-order eddy current dampers (21) are connected into a matrix through damper connecting frames (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322045630.8U CN220791881U (en) | 2023-08-01 | 2023-08-01 | Modularized second-order eddy current damper for fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322045630.8U CN220791881U (en) | 2023-08-01 | 2023-08-01 | Modularized second-order eddy current damper for fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220791881U true CN220791881U (en) | 2024-04-16 |
Family
ID=90629179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322045630.8U Active CN220791881U (en) | 2023-08-01 | 2023-08-01 | Modularized second-order eddy current damper for fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220791881U (en) |
-
2023
- 2023-08-01 CN CN202322045630.8U patent/CN220791881U/en active Active
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