CN108425809B - Fan blade buffer device - Google Patents
Fan blade buffer device Download PDFInfo
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- CN108425809B CN108425809B CN201810498590.3A CN201810498590A CN108425809B CN 108425809 B CN108425809 B CN 108425809B CN 201810498590 A CN201810498590 A CN 201810498590A CN 108425809 B CN108425809 B CN 108425809B
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- fan blade
- buffering
- fan
- bracket
- buffer device
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- 230000003139 buffering effect Effects 0.000 claims abstract description 30
- 238000013016 damping Methods 0.000 claims description 21
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 230000006378 damage Effects 0.000 abstract description 16
- 239000004033 plastic Substances 0.000 abstract description 8
- 229920003023 plastic Polymers 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
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- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a fan blade buffering device which comprises a connecting part and a buffering part arranged on the connecting part, wherein the buffering part comprises a first buffering part with a frame structure and a detachable buffering pad arranged on the first buffering part, and a stop block is arranged at the bottom of the first buffering part. The fan blade buffer device has the advantages that the effective absorption of blade collision energy can be further ensured, the fan blade is prevented from freely swinging to the greater extent to cause damage to a fan unit, the stop block can give a supporting force to the buffer device when the buffer device of the fan blade is deformed after collision, the damage to a variable-pitch bearing of the fan is avoided, and the economic loss is better avoided. Because the stop block is contacted with the variable pitch bearing after the buffer device is subjected to plastic deformation, the support rigidity of the buffer device is enhanced, the hollow buffer frame is further deformed to absorb energy, and the buffer effect is achieved.
Description
Cross Reference to Related Applications
The present application claims priority from chinese patent application CN201710371167.2 entitled "a fan blade damping device" filed 24.5.2017, the entire contents of which are incorporated herein by reference.
Technical Field
The invention belongs to the technical field of wind power, and particularly relates to a fan blade buffering device.
Background
In a large-scale wind generating set, a variable pitch mechanism is often adopted to control the pitch of blades, and the variable pitch mechanism controls the installation angle of the blades to change along with the change of wind speed, so that the speed regulation before the networking of the generator is realized, the impact current during the networking is reduced, the output power can be kept relatively stable, and the generating capacity of a fan is improved. However, the pitch mechanism increases the failure rate of the wind turbine. If a transmission chain in the pitch control mechanism breaks down, the blades can swing freely, and the blades can collide with a tower of a fan when swinging freely, so that the blades and the wind generating set are damaged, and great economic loss is generated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a fan blade buffer device to avoid the damage to a wind generating set when a fan blade swings freely, thereby avoiding economic loss.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a fan blade buffering device comprises a connecting part and a buffering part arranged on the connecting part, wherein the buffering part comprises a first buffering part with a frame structure and a detachable buffering cushion arranged on the first buffering part, and a stop block is arranged at the bottom of the first buffering part.
The fan blade buffering device composed of the connecting component and the buffering component is arranged on the fan blade, and when the fan blade freely swings beyond a limited range due to failure of a transmission chain of a fan variable pitch mechanism, the buffering device can collide with a fan hub to effectively absorb collision energy, so that damage to a wind generating set due to free swing of the fan blade is avoided. Through multistage buffer unit, can further ensure buffer and effectively absorb blade collision energy to the damage to fan group that has avoided blade free swing to the bigger degree to lead to the fact. The stop block can give a supporting force to the buffer device when the fan blade buffer device is deformed after collision, so that the damage of a fan variable pitch bearing is avoided. Because the stop block is contacted with the variable pitch bearing after the buffer device is subjected to plastic deformation, the support rigidity of the buffer device is enhanced, the hollow buffer frame is further deformed to absorb energy, and the buffer effect is achieved.
With respect to the above technical solution, further improvements as described below can be made.
According to the fan blade damping device, in a preferred embodiment, the connecting part is configured as a plate structure with a part matched with the fan pitch bearing, and the stop is configured as a plate-shaped part which extends from one end of the first damping part far away from the connecting part and is approximately parallel to the connecting part. The connecting part can be extremely conveniently installed on the fan variable pitch bearing through the structural form of the connecting part, the structure of the connecting part can be simplified as far as possible, and therefore production and manufacturing cost is reduced.
Further, in a preferred embodiment, a protective block is provided at the free end of the stop. The purpose of setting up the protection piece is further to prevent that fan blade buffer from producing the deformation after the collision and causing the destruction to fan becomes oar bearing surface anticorrosive coating.
Specifically, in a preferred embodiment, the first buffer member includes a first bracket and a second bracket, and the first bracket is connected with the second bracket to configure a hollow frame. The metal frame configured as a hollow frame can improve plastic deformation of metal as much as possible to improve the cushioning capacity of the cushioning device.
Specifically, in a preferred embodiment, the first bracket includes a bottom plate, and a first side plate and a second side plate extending from both ends of the bottom plate, respectively, and being substantially parallel to each other, wherein the stopper protrudes from an end of the bottom plate away from the connecting member, and is substantially perpendicular to the bottom plate. The structure of the first bracket is simple as much as possible, so that the first bracket is simple and convenient to mount, produce and manufacture, and accordingly the cost can be reduced.
Further, in a preferred embodiment, the cushion pad is arranged on the second side plate.
In particular, in a preferred embodiment, the second bracket is configured as a circular arc-shaped plate provided with a hollow area, the circular arc-shaped plate being connected with the first side plate and the second side plate, respectively. The first bracket, which is configured as a circular arc-shaped plate structure having a hollow region, can reduce the weight as much as possible while the strength of the bracket will be ensured.
Further, in a preferred embodiment, a reinforcing rib connected to a surface of the first side plate facing away from the second side plate is provided on the connecting member. The reinforcing ribs are arranged between the connecting parts and the first side plate, so that the connecting strength and reliability between the first support and the connecting parts can be guaranteed.
Further, in a preferred embodiment, the bottom surface of the first bracket is provided with a plurality of uniformly spaced ribs extending in the width direction of the bottom surface. The bottom surface of the first bracket is provided with the reinforcing ribs, so that the connection strength and reliability between the first bracket and the connecting part can be further improved.
Further, in a preferred embodiment, the connecting part is provided with a mounting hole which is matched with the fan pitch bearing for mounting.
The buffer device is arranged on the fan variable pitch bearing in a detachable mounting mode, so that the buffer device can be mounted and replaced simply and quickly.
Compared with the prior art, the invention has the advantages that: the impact energy of the blades can be further effectively absorbed, so that the damage to the wind generating set caused by the free swing of the fan blades is avoided to a greater extent, the stop block can give a supporting force to the buffer device when the buffer device of the fan blades is deformed after the collision, the damage to a variable-pitch bearing of the fan is avoided, and the economic loss is better avoided.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 schematically illustrates an installation of a fan blade damper according to an embodiment of the present invention;
FIG. 2 schematically illustrates the overall construction of a fan blade damping arrangement in accordance with an embodiment of the present invention;
FIG. 3 is a view schematically showing a partial structure of a fan blade damper according to an embodiment of the present invention;
FIG. 4 schematically illustrates a first cushioning component of an embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The drawings are not to scale.
Detailed Description
The invention will be further explained in detail with reference to the figures and the embodiments without thereby limiting the scope of protection of the invention.
FIG. 1 schematically illustrates an installation of a fan blade damper 10 in accordance with an embodiment of the present invention. Fig. 2 schematically shows the overall structure of the fan blade damper 10 according to the embodiment of the present invention. Fig. 3 schematically shows a partial structure of the fan blade damper 10 according to the embodiment of the present invention. Fig. 4 schematically shows the first cushioning member 21 of the embodiment of the present invention.
As shown in fig. 1 to 4, a fan blade damping device 10 according to an embodiment of the present invention includes a connection member 1 and a damping member 2 disposed on the connection member 1, wherein the damping member 2 includes a first damping member 21 having a frame structure, and a detachable cushion 22 disposed on the first damping member 21, and a stopper 3 is disposed at a bottom of the first damping member 21. The fan blade buffering device composed of the connecting component and the buffering component is arranged on the fan blade, and when the fan blade freely swings beyond a limited range due to failure of a transmission chain of a fan variable pitch mechanism, the buffering device can collide with a fan hub to effectively absorb collision energy, so that damage to a fan unit due to free swing of the fan blade is avoided. Through the multistage buffer parts, the buffer device can be further ensured to effectively absorb the collision energy of the blades, so that the damage to the wind generating set caused by the free swing of the blades is avoided to a greater extent. The stop block can give a supporting force to the buffer device when the fan blade buffer device is deformed after collision, so that the damage of a fan variable pitch bearing is avoided. Because the stop block is contacted with the variable pitch bearing after the buffer device is subjected to plastic deformation, the support rigidity of the buffer device is enhanced, the hollow buffer frame is further deformed to absorb energy, and the buffer effect is achieved. Specifically, cushion pad 22 is typically coupled to first cushioning component 21 using a bolt 8 and nut 9 connection.
As shown in fig. 2, according to the fan blade damping device 10 of the present invention, in a preferred embodiment, the connecting member 1 is configured as a plate structure having a portion that forms a fit with the fan pitch bearing 7, and the stopper 3 is configured as a plate-like member that extends from an end of the first damping member 21 remote from the connecting member 1 and extends substantially parallel to the connecting member 1. The connecting part can be extremely conveniently installed on the fan variable pitch bearing through the structural form of the connecting part, the structure of the connecting part can be simplified as far as possible, and therefore production and manufacturing cost is reduced.
Further, in a preferred embodiment, a protection block 4 is provided at the free end of the stop 3. The purpose of setting up the protection piece is further to prevent that fan blade buffer from producing the deformation after the collision and causing the destruction to fan becomes oar bearing surface anticorrosive coating.
Specifically, as shown in fig. 4, in a preferred embodiment, the first buffer member 21 includes a first bracket 211 and a second bracket 212, and the first bracket 211 and the second bracket 212 are connected to form a hollow frame. The metal frame configured as a hollow frame can improve plastic deformation of metal as much as possible to improve the cushioning capacity of the cushioning device. Specifically, in a preferred embodiment, the first bracket 211 includes a bottom plate 2111, and a first side plate 2112 and a second side plate 2113 extending from both ends of the bottom plate 2111, respectively, substantially parallel to each other, wherein the stopper 3 protrudes from one end of the bottom plate 2111 away from the connecting member 1, and is substantially perpendicular to the bottom plate 2111. The structure of the first bracket is simple as much as possible, so that the first bracket is simple and convenient to mount, produce and manufacture, and accordingly the cost can be reduced. Further, as shown in FIG. 2, in a preferred embodiment, cushion 22 is disposed on second side plate 2113.
As shown in fig. 4, in particular, in a preferred embodiment, the second bracket 212 is configured as a circular arc-shaped plate provided with a hollow area, and the circular arc-shaped plate is connected with the first side plate 2112 and the second side plate 2113, respectively. The first bracket, which is configured as a circular arc-shaped plate structure having a hollow region, can reduce the weight as much as possible while the strength of the bracket will be ensured.
Further, as shown in fig. 2 and 3, in a preferred embodiment, a reinforcing rib 5 connected to a surface of the first side plate 2112 facing away from the second side plate 2113 is provided on the connecting member 1. The reinforcing ribs are arranged between the connecting parts and the first side plate, so that the connecting strength and reliability between the first support and the connecting parts can be guaranteed. Further, in a preferred embodiment, the bottom surface of the first bracket 211 is provided with a plurality of reinforcing ribs 5 uniformly spaced apart and extending in the width direction of the bottom surface. The bottom surface of the first bracket is provided with the reinforcing ribs, so that the connection strength and reliability between the first bracket and the connecting part can be further improved.
In the present embodiment, as shown in fig. 2 and 3, preferably, for simple installation and maintenance, and for the damping device to be used in an already installed fan, the connecting part 1 is provided with a mounting hole 6 which is installed in cooperation with a fan pitch bearing 7. The buffer device is arranged on the fan variable pitch bearing in a detachable mounting mode, so that the buffer device can be mounted and replaced simply and quickly.
In the present embodiment, it is preferable that the first buffer member 21 is configured as a metal frame and the cushion pad 22 is a rubber pad. The cushion pad 22 may be made of polyurethane, elastic cement, or the like. The buffer device is provided with elastic deformation of glue and plastic deformation of metal, and the buffer capacity of the buffer device is improved. The buffer metal frame continues to deform after the rubber deforms, so that the collision time of the buffer device with the fan hub in collision is prolonged, and the collision force is correspondingly reduced according to impulse and momentum theorem, so that the buffer device has the advantage of low impedance and protects other parts. And the metal frame generates plastic deformation after collision, so that the corresponding force energy is converted into heat energy to be consumed, and the energy absorption efficiency of the buffer device is high.
According to the embodiment, the fan blade buffering device is arranged on the variable pitch bearing of the fan, and the whole buffering device rotates along with the rotation of the variable pitch bearing. When the fan blade freely swings beyond the limited range due to failure of a transmission chain of the fan variable pitch mechanism, the buffer device can collide with the fan hub to effectively absorb collision energy, so that damage to the wind generating set due to free swing of the blade is avoided. Through the multistage buffer parts, the buffer device can be further ensured to effectively absorb the collision energy of the blades, so that the damage to the wind generating set caused by the free swing of the blades is avoided to a greater extent. The stop block can give a supporting force to the buffer device when the fan blade buffer device is deformed after collision, so that the damage of a fan variable pitch bearing is avoided. Because the stop block is contacted with the variable pitch bearing after the buffer device is subjected to plastic deformation, the support rigidity of the buffer device is enhanced, the hollow buffer frame is further deformed to absorb energy, and the buffer effect is achieved.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (8)
1. A fan blade buffering device is characterized by comprising a connecting part and a buffering part arranged on the connecting part, wherein the buffering part comprises a first buffering part with a frame structure and a detachable buffering pad arranged on the first buffering part, and a stop block is arranged at the bottom of the first buffering part;
the connecting part is configured as a plate structure with a part matched with a fan pitch bearing, and the stop block is configured as a plate-shaped part which extends out from one end of the first buffer part far away from the connecting part and is approximately parallel to the connecting part;
and a protection block is arranged at the free end of the stop block.
2. The fan blade damping device of claim 1, wherein the first damping member comprises a first bracket and a second bracket; the first bracket and the second bracket are connected to form a hollow frame.
3. The fan blade damping device of claim 2, wherein the first bracket comprises a bottom plate, and first and second side plates extending from opposite ends of the bottom plate, respectively, and being substantially parallel to each other, wherein the stop extends from an end of the bottom plate remote from the connecting member and is substantially perpendicular to the bottom plate.
4. The fan blade damping device of claim 3, wherein the cushion is disposed on the second side plate.
5. The fan blade damping device according to any one of claims 2 to 4, wherein the second bracket is configured as a circular arc-shaped plate provided with a hollow area, the circular arc-shaped plate being connected to the first side plate and the second side plate, respectively.
6. The fan blade damping device according to claim 3 or 4, wherein a reinforcing rib connected to a surface of the first side plate facing away from the second side plate is provided on the connecting member.
7. The fan blade damping device according to claim 3 or 4, wherein the bottom surface of the first support is provided with a plurality of uniformly spaced ribs extending in the width direction of the bottom surface.
8. The fan blade damping device according to any one of claims 1 to 4, wherein the connecting member is provided with a mounting hole for fitting with a fan pitch bearing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017103711672 | 2017-05-24 | ||
| CN201710371167 | 2017-05-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108425809A CN108425809A (en) | 2018-08-21 |
| CN108425809B true CN108425809B (en) | 2020-01-14 |
Family
ID=63163854
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810498531.6A Active CN108644071B (en) | 2017-05-24 | 2018-05-23 | Fan blade buffer device |
| CN201810498615.XA Active CN108425810B (en) | 2017-05-24 | 2018-05-23 | Fan blade buffer device |
| CN201810498590.3A Active CN108425809B (en) | 2017-05-24 | 2018-05-23 | Fan blade buffer device |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810498531.6A Active CN108644071B (en) | 2017-05-24 | 2018-05-23 | Fan blade buffer device |
| CN201810498615.XA Active CN108425810B (en) | 2017-05-24 | 2018-05-23 | Fan blade buffer device |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN108644071B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201568208U (en) * | 2009-10-26 | 2010-09-01 | 华锐风电科技(集团)股份有限公司 | Variable pitch limiting device of wind turbine generator system |
| GB201020977D0 (en) * | 2010-12-10 | 2011-01-26 | Nordic Windpower Ltd | Buffer device |
| CN202047948U (en) * | 2011-05-04 | 2011-11-23 | 株洲时代新材料科技股份有限公司 | Elastic element for warping board hub of two-blade wind power generator unit |
| CN104389746B (en) * | 2014-10-16 | 2017-11-07 | 新疆金风科技股份有限公司 | The impeller and wind power generating set of wind power generating set |
| CN205876597U (en) * | 2016-07-28 | 2017-01-11 | 株洲时代新材料科技股份有限公司 | Wind -driven generator |
-
2018
- 2018-05-23 CN CN201810498531.6A patent/CN108644071B/en active Active
- 2018-05-23 CN CN201810498615.XA patent/CN108425810B/en active Active
- 2018-05-23 CN CN201810498590.3A patent/CN108425809B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108425809A (en) | 2018-08-21 |
| CN108425810A (en) | 2018-08-21 |
| CN108425810B (en) | 2020-01-14 |
| CN108644071A (en) | 2018-10-12 |
| CN108644071B (en) | 2020-01-14 |
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