CN219827046U - Efficient blade aero-thermal deicing device - Google Patents
Efficient blade aero-thermal deicing device Download PDFInfo
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- CN219827046U CN219827046U CN202320447614.9U CN202320447614U CN219827046U CN 219827046 U CN219827046 U CN 219827046U CN 202320447614 U CN202320447614 U CN 202320447614U CN 219827046 U CN219827046 U CN 219827046U
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- deicing
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- thermal
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- 230000005611 electricity Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 6
- 238000009423 ventilation Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
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- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
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- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
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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
Abstract
The utility model relates to a wind-powered electricity generation field, concretely relates to efficient paddle aero-thermal defroster, including cabin, wheel hub and a plurality of blade, wheel hub is connected to the cabin, and a plurality of blades set up on wheel hub, and the blade includes the casing, sets up the blade leading edge web at the blade leading edge of casing and sets up the blade trailing edge web at the blade trailing edge of casing, and the air-blower is installed to the head of air inlet passageway, and the heater is installed to the air inlet of air-blower, and the afterbody of air inlet passageway is equipped with a plurality of spoilers, and the afterbody of blade leading edge web is equipped with a plurality of blade leading edge web air vents. Through the arrangement of the vent holes of the web plates at the front edges of the blades, the flow resistance of the deicing system is reduced; the spoiler is arranged in a key deicing area of the front edge of the blade, and the temperature rise of the outer wall of the blade in the key deicing area is enhanced.
Description
Technical Field
The utility model relates to the field of wind power, in particular to a high-efficiency blade air-heat deicing device.
Background
Wind power is used as a renewable new energy source and occupies a higher position in the electric power structure of China. However, when operating in winter, blade icing presents a double nuisance to the operational safety and power generation benefits of wind farms. The blade icing damages the pneumatic appearance, reduces the wind energy capturing capacity of the unit, and increases the load and vibration of the blade. Wind farm owners are pressing to need a system that can de-ice blade assemblies for wind farms that are more severely iced. Hot blast heating deicing is an active anti-freezing technology for blades, and by delivering heated air into the inner cavity of the blade, the heat carried by the hot air is transferred from the inner surface to the outer surface of the blade, thereby melting the ice layer on the outer surface of the blade. The hot blast heating deicing has the advantages of safe and reliable operation, simple and easy maintenance, lower system cost and the like. From the heat transfer flow, the hot blast deicing mainly comprises two heat transfer processes of heat convection and heat conduction.
According to the method and the system for optimizing the deicing performance of the blades of the wind driven generator, which are disclosed in the patent number 2022113917418, referring to fig. 3, the front edge area is a main windward area, and is also an area where the icing of the blades is serious and the influence of the icing on the aerodynamic performance of the blades is large. The hot blast heating deicing is an active anti-freezing technology, and the hot air circulating system consists of a blast blower, a heater, a ventilation pipeline and an inner cavity of a blade. The above-mentioned disadvantages are as follows:
1. the ventilation pipe is required to be additionally arranged, the installation and the later maintenance and replacement are both troublesome, the factory production efficiency of the blade is affected, and the design cost is high.
2. The front edge web is free of holes, the flow sectional area of the blade tip is small, the flow resistance is large, and the blower is large in shape selection and heavy in weight.
3. The rear edge web is free of wind shields, so that heat dissipation loss of a rear edge non-critical deicing area is large, and deicing efficiency is reduced.
4. The key area of the front edge is not provided with a spoiler, so that the flow rate of hot air flow on the wall surface of the inner cavity of the front edge is lower, the convection heat transfer coefficient is smaller, and the thermal resistance is larger.
5. The system has slow circulation temperature rise and long deicing time.
And 6, the temperature control of the heater outlet is not arranged on the wall surface of the blade, the air temperature of the heater outlet cannot be fully improved, and the deicing performance is poor.
In view of this, the present utility model provides a high efficiency blade aero-thermal de-icing apparatus.
Disclosure of Invention
The utility model aims to provide a high-efficiency blade air-heat deicing device aiming at the defects of the prior art.
In order to solve the technical problems, the following technical scheme is adopted:
the utility model provides an efficient blade aero-thermal defroster, includes cabin, wheel hub and a plurality of blade, wheel hub is connected to the cabin, and a plurality of the blade sets up on the wheel hub, its characterized in that: the blade comprises a shell, a blade front edge web plate arranged at the blade front edge of the shell and a blade rear edge web plate arranged at the blade rear edge of the shell, wherein a circulating air outlet channel is formed in a cavity between the blade front edge web plate and the shell, a circulating return air channel is formed between the blade front edge web plate and the blade rear edge web plate, a blower is arranged at the head of the circulating air outlet channel, a heater is arranged at the air inlet of the blower, a plurality of spoilers are arranged at the tail of the circulating air outlet channel, and the spoilers are arc spoilers; the tail part of the blade front edge web plate is provided with a plurality of blade front edge web plate vent holes, and the blade front edge web plate vent holes are communicated with the circulating air outlet channel and the circulating air return channel.
Further, the blower and the heater are fixed on the partition board, and the partition board is in sealing fixation with flange connection pre-buried at the front edge of the blade and the web plate of the front edge of the blade through fasteners.
Further, the intelligent system flow adjusting device is arranged on the partition plate.
Further, a first wind deflector is arranged between blade trailing edge webs of the blade trailing edge near the blade tip position of the shell; a second wind deflector is mounted between the blade trailing edge webs of the blade trailing edge near the blade root position of the shell.
Further, the device also comprises a blade inner wall temperature safety control device which is arranged on a blade front edge web plate close to the heater air outlet
Further, the device also comprises a heater over-temperature protection device, and the heater over-temperature protection device is arranged on the heater. In the running process of the system, the heater can have abnormal dry heating, the device feeds back signals through the temperature sensor, and when the temperature exceeds a certain value, the system safety fault is reported.
Further, an icing detection device is arranged on the outer side of the blade root of the blade.
Further, install electric slip ring, unit switch board and unit switch board in the cabin, unit switch board and unit switch board are all connected electric slip ring, the lower part in cabin is equipped with a tower section of thick bamboo.
Further, deicing control module and switch board are equipped with in the wheel hub, the air-blower is connected with deicing control module and switch board, deicing control module is connected with the electric slip ring.
Due to the adoption of the technical scheme, the method has the following beneficial effects:
the utility model relates to a high-efficiency blade aerothermal deicing device, which reduces the flow resistance of a deicing system by arranging a vent hole of a web plate at the front edge of a blade; the spoiler is arranged in a key deicing area of the front edge of the blade, and the temperature rise of the outer wall of the blade in the key deicing area is enhanced; and a wind shield is arranged between the rear edge of the blade and the web plate of the rear edge of the blade, so that the heat dissipation loss of a non-critical deicing area is reduced, the deicing capability of the system is obviously improved, the air quantity of the blower and the power selection design of the heater are optimized, the power and the weight of the blower and the heater are reduced, and the installation and the maintenance are convenient.
When the deicing system just starts to operate, the intelligent system flow regulating device is started, circulation from the outlet air quantity of the heater to the inlet of the blower is accelerated, air circulation heating time is shortened, deicing efficiency is improved, and generating capacity of the unit is increased.
Drawings
The utility model is further described below with reference to the accompanying drawings:
fig. 1 is a schematic structural diagram of a high-efficiency blade aero-thermal deicing device according to an embodiment of the present utility model.
FIG. 2 is a schematic view of the interior of a blade according to an embodiment of the present utility model.
FIG. 3 is a schematic diagram of a comparison of an optimized leading blade outer wall and an optimized trailing blade outer wall according to an embodiment of the present utility model.
FIG. 4 is a schematic view of a spoiler according to an embodiment of the utility model mounted to a blade leading edge web.
Fig. 5 is a flow chart illustrating an embodiment of the present utility model for a high efficiency blade aero-thermal de-icing apparatus.
In the figure: 1-a cabin; 2-a hub; 3-leaf blades; 4-a unit control cabinet; 5-a unit power distribution cabinet; 6-an electrical slip ring; 7-a deicing control module; 8-a power distribution cabinet; 9-tower; 10-blower.
11-a heater; 12-spoiler; 13-blade leading edge web vent holes; 14-a separator; 15-an intelligent system flow regulating device; 16-a first wind deflector; 17-a second wind deflector; 18-a blade inner wall temperature safety control device; 19-a heater over-temperature protection device; 20-icing detection means; 21-deicing key zone.
31-a housing; 32-blade leading edge; 33-blade trailing edge; 34-blade tips; 35-blade root; 36-blade leading edge web; 37-blade trailing edge web; 38-circulating air outlet channels; 39-circulation return air channel.
Detailed Description
The present utility model will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.
Referring to fig. 1-5, a high efficiency blade aero-thermal deicing device comprises a nacelle 1, a hub 2 and a plurality of blades 3, wherein the nacelle 1 is connected with the hub 2, the plurality of blades 3 are arranged on the hub 2, the blades 3 comprise a shell 31, a blade front edge web 36 arranged at a blade front edge 32 of the shell 31 and a blade rear edge web 37 arranged at a blade rear edge 33 of the shell 31, a circulating air outlet channel 38 is formed by a cavity between the blade front edge web 36 and the shell 31, a circulating return air channel 39 is formed between the blade front edge web 36 and the blade rear edge web 37, a blower 10 is arranged at the head of the circulating air outlet channel 38, a heater 11 is arranged at the air inlet of the blower 10, and a plurality of spoilers 12 are arranged at the tail of the circulating air outlet channel 38. The deicing key region 21 of the blade front edge 32 is additionally provided with a plurality of spoilers 12, each spoiler 12 is arranged every 3-5m, the convection heat exchange between the hot air flow of the key deicing region and the inner wall surface of the blade front edge 32 is enhanced, the temperature rise of the outer wall surface of the blade 3 is obviously improved, the deicing efficiency is improved, and meanwhile, the flow resistance is not obviously increased.
As a further explanation of the present embodiment, a plurality of blade leading edge web ventilation holes 13 are provided at the tail of the blade leading edge web 36, and the blade leading edge web ventilation holes 13 are communicated with the circulating air outlet channel 38 and the circulating air return channel 39; the ventilation holes 13 of the front edge webs of the blades are equidistantly formed in the tail portions of the front edge webs 36 of the blades, so that the flow resistance of the inner cavities of the blades 3 is remarkably reduced, the smaller blower 10, even lighter axial flow fans can be selected, the equipment cost is reduced, the equipment volume is reduced, and the later maintenance and replacement are facilitated.
As a further illustration of this embodiment, the blower 10 and the heater 11 are secured to the bulkhead 14, and the bulkhead 14 is sealingly secured to the flange connections embedded in the vane leading edge 32 and the vane leading edge web 36 by fasteners. The baffle 14 is connected with the flange pre-buried at the blade front edge 32 and the blade front edge web 36 through the fastener and is correspondingly sealed, so that the installation and the fixation are convenient, the later maintenance and the replacement are convenient, the ventilation pipe arrangement of the sectional installation in the prior art is avoided, the reliability is high, the manufacturing period of the blade 3 is not influenced, the cost is low, and the factory production efficiency of the blade 3 is improved.
As a further explanation of the present embodiment, the deicing device further includes a system flow intelligent adjustment device 15, where the system flow intelligent adjustment device 15 is disposed on the partition 14. The partition 14 is provided with holes, and the flow of the system is intelligently regulated by regulating the area of the holes. When the deicing system starts to operate, the intelligent system flow adjusting device 15 is started to accelerate circulation from the outlet air quantity of the heater 11 to the inlet of the blower 10, and shorten the air circulation heating time.
As a further illustration of the present embodiment, a first wind deflector 16 is mounted between blade trailing edge webs 37 of the blade trailing edge 33 at a location proximate to the blade tip 34 of the housing 31; a second wind deflector 17 is mounted between the blade trailing edge webs 37 of the blade trailing edge 33 near the blade root 35 of the housing 31. And wind shields are respectively arranged between the blade trailing edge 33 and the blade trailing edge web 37 near the blade tip 34 and the blade root 35, so that the heat dissipation loss of a non-critical deicing area of the trailing edge is reduced, and the deicing efficiency is remarkably improved.
As a further illustration of this embodiment, the de-icing assembly further comprises a blade inner wall temperature safety control 18, said blade inner wall temperature safety control 18 being mounted on the blade leading edge web 36 near the outlet of the heater 11.
As a further illustration of the present embodiment, the de-icing arrangement further comprises a heater overtemperature protection arrangement 19, said heater overtemperature protection arrangement 19 being arranged at the outlet of said heater 11. Because the blades 3 are made of glass fiber reinforced plastic, the limiting temperature is not more than 75 ℃, the temperature of the inner wall of the blades 3 near the outlet of the heater 11 needs to be controlled within 75 ℃, preferably within 70 ℃, and the heater over-temperature protection device 19 feeds back a temperature sensor signal to adjust the start and stop of the heater 11 and control the outlet temperature of the heater 11.
As a further illustration of the present embodiment, the blade 3 is provided with icing detection means 20 on the outside of the blade root 35.
As a further explanation of the present embodiment, an electric slip ring 6, a unit control cabinet 4 and a unit power distribution cabinet 5 are installed in the nacelle 1, and the unit control cabinet 4 and the unit power distribution cabinet 5 are both connected with the electric slip ring 6.
As a further explanation of the present embodiment, a deicing control module 7 and a power distribution cabinet 8 are disposed in the hub 2, and the blower 10 is connected with the deicing control module 7 and the power distribution cabinet 8, and the deicing control module 7 is connected with the electric slip ring 6.
As a further illustration of the present embodiment, the lower part of the nacelle 1 is provided with a tower 9.
As a further explanation of the present embodiment, the spoiler 12 is an arc-shaped spoiler 12. The design of the arc spoiler 12 improves enhanced heat transfer without significantly increasing flow resistance.
As a further explanation of this embodiment, the leading edge 32 of the blade is provided with a deicing key area 21, and a carbon fiber material with high thermal conductivity is laid on the deicing key area 21, so that the deicing key area is quickly warmed up, and local ice is quickly dissolved to drive surrounding ice to melt, thereby shortening the deicing time.
As a further explanation of the present embodiment, the non-deicing critical area of the blade leading edge 32, the blade trailing edge 33, the blade tip 34 of the casing 31, and the blade root 35 of the casing 31 are paved with a heat-insulating coating material or a heat-insulating device, which is used to reduce heat dissipation loss of the blade 3 and improve the utilization rate of the heater 11.
When the wind turbine generator is shut down due to icing or the icing detection device 20 detects a signal about to icing, the turbine control cabinet 4 receives a start signal of the deicing system of the blade 3 and sends an instruction to the deicing control and power distribution cabinet 8, the blower 10 and the heater 11 of the blade 3 are sequentially started, the temperature of the air inlet of the blower 10 and the temperature of the air outlet of the heater 11 are rapidly increased, air flows from the air outlet of the heater 11, firstly pass through the circulating air outlet channel 38 and then enter the circulating air return channel 39 through the web vent 13 at the front edge of the blade, finally returns to the blower 10, the air flows circulate in the blade 3, the temperature of the inner wall of the blade 3 is increased, and when the intelligent control device of the temperature of the inner wall of the blade 3 detects that the temperature reaches a set value, the intelligent control device of the temperature of the inner wall of the blade 3 is controlled to be in a constant range through controlling the start-stop of the heater 11.
The above is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present utility model to solve the substantially same technical problems and achieve the substantially same technical effects are encompassed within the scope of the present utility model.
Claims (9)
1. The utility model provides an efficient blade aero-thermal defroster, includes cabin, wheel hub and a plurality of blade, wheel hub is connected to the cabin, and a plurality of the blade sets up on the wheel hub, its characterized in that: the blade comprises a shell, a blade front edge web plate arranged at the blade front edge of the shell and a blade rear edge web plate arranged at the blade rear edge of the shell, wherein a circulating air outlet channel is formed in a cavity between the blade front edge web plate and the shell, a circulating return air channel is formed between the blade front edge web plate and the blade rear edge web plate, a blower is arranged at the head of the circulating air outlet channel, a heater is arranged at the air inlet of the blower, a plurality of spoilers are arranged at the tail of the circulating air outlet channel, and the spoilers are arc spoilers; the tail part of the blade front edge web plate is provided with a plurality of blade front edge web plate vent holes, and the blade front edge web plate vent holes are communicated with the circulating air outlet channel and the circulating air return channel.
2. A high efficiency blade aero-thermal de-icing apparatus as defined in claim 1 wherein: the air blower and the heater are fixed on the partition board, and the partition board is connected with the flange pre-buried at the front edge of the blade and the web plate at the front edge of the blade through fasteners in a sealing and fixing mode.
3. A high efficiency blade aero-thermal deicing apparatus according to claim 2, wherein: the intelligent system flow regulating device is arranged on the partition plate.
4. A high efficiency blade aero-thermal de-icing apparatus as defined in claim 1 wherein: a first wind deflector is arranged between blade trailing edge webs of the blade trailing edge near the blade tip position of the shell; a second wind deflector is mounted between the blade trailing edge webs of the blade trailing edge near the blade root position of the shell.
5. A high efficiency blade aero-thermal de-icing apparatus as defined in claim 1 wherein: the air conditioner further comprises a blade inner wall temperature safety control device, and the blade inner wall temperature safety control device is arranged on a blade front edge web plate close to the air outlet of the heater.
6. A high efficiency blade aero-thermal de-icing apparatus as defined in claim 1 wherein: the heater over-temperature protection device is arranged on the heater.
7. A high efficiency blade aero-thermal de-icing apparatus as defined in claim 1 wherein: and an icing detection device is arranged on the outer side of the blade root of the blade.
8. A high efficiency blade aero-thermal de-icing apparatus as defined in claim 1 wherein: the electric slip ring, the unit control cabinet and the unit power distribution cabinet are arranged in the engine room, the unit control cabinet and the unit power distribution cabinet are connected with the electric slip ring, and a tower barrel is arranged at the lower part of the engine room.
9. A high efficiency blade aero-thermal de-icing apparatus as defined in claim 8 wherein: the novel deicing device is characterized in that a deicing control module and a power distribution cabinet are arranged in the hub, the blower is connected with the deicing control module and the power distribution cabinet, and the deicing control module is connected with the electric slip ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320447614.9U CN219827046U (en) | 2023-03-10 | 2023-03-10 | Efficient blade aero-thermal deicing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320447614.9U CN219827046U (en) | 2023-03-10 | 2023-03-10 | Efficient blade aero-thermal deicing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219827046U true CN219827046U (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320447614.9U Active CN219827046U (en) | 2023-03-10 | 2023-03-10 | Efficient blade aero-thermal deicing device |
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| Country | Link |
|---|---|
| CN (1) | CN219827046U (en) |
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2023
- 2023-03-10 CN CN202320447614.9U patent/CN219827046U/en active Active
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