CN101787953A - Combined wind-power impeller - Google Patents
Combined wind-power impeller Download PDFInfo
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- CN101787953A CN101787953A CN200910028373A CN200910028373A CN101787953A CN 101787953 A CN101787953 A CN 101787953A CN 200910028373 A CN200910028373 A CN 200910028373A CN 200910028373 A CN200910028373 A CN 200910028373A CN 101787953 A CN101787953 A CN 101787953A
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- type blade
- impeller
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/30—Wind power
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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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- 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
- Y02E10/728—Onshore wind turbines
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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
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention relates to a combined wind-power impeller. The combined wind-power impeller is characterized in that the combined wind-power impeller is composed of resisting vanes, impelling vanes, a rotating shaft and spacer plates, wherein the resisting vanes are arranged at the central part near the rotating shaft of the impeller; the impelling vanes are arranged at the outer edge position of the impeller; an opening is respectively arranged between the resisting vanes and the impelling vanes; the resisting vanes and the impelling vanes are respectively arranged with the rotating shaft as a symmetrical axis; and the whole impeller is divided into layers of impeller units by the spacer plates along the axial direction of the rotating shaft. The wind-power impeller makes full use of the advantages of the resisting vanes and the impelling vanes, and a layered structure of the spacer plates to the vanes effectively overcomes the adverse impact of turbulence in the vertical direction of airflow, thereby improving the wind energy converting efficiency of the whole impeller. In the invention, component-based design is supplied for the wind-power impeller in both horizontal and vertical directions, and the wind-power impeller is assembled and spliced in the mode of blocks building, thereby lowering the difficulty in production, transportation and installation of the huge wind-power impeller.
Description
Technical field
The present invention relates to the impeller in the wind power plant, especially is a kind of wind electric impeller of extra-large-size vertical-shaft wind power generation equipment.
Background technique
In recent years, in large-scale or super-huge wind power plant, adopted the vertical axis wind electric impeller generally to be approved by industry, and entered the experimental stage.The shape of existing vertical shaft fan blade has simple resistance type, and simple lift-type is also arranged.It is less that simple resistance type fan blade starts required wind speed, and its wind energy conversion efficiency is lower, though and simple lift-type fan blade wind energy conversion efficiency is higher, but that it starts required wind speed is bigger.For large-scale or extra-large-size vertical-shaft wind power generation equipment, because fan blade yardstick super large, little and the wind energy conversion efficiency height of starting wind velocity is one of the design object that need pursue simultaneously, and how to reduce the production and transport mounting hardness also be to face one of difficult problem to the fan blade of yardstick super large simultaneously.
Summary of the invention
The present invention seeks to, provide a kind of wind power plant used vertical axis wind electric impeller, solve the difficult problem that megawatt-level wind impeller manufacturing, transportation, installation are faced, simultaneously, effectively reduce requirement and the raising wind energy conversion efficiency of megawatt-level wind impeller starting wind velocity.
For achieving the above object, the technological scheme of wind electric impeller of the present invention is, the formation of this wind electric impeller includes, resistance type blade, lift-type blade, rotating shaft and dividing plate, near this impeller shaft center portion is provided with the resistance type blade, this impeller outer edge is provided with the lift-type blade, be provided with opening between resistance type blade and the lift-type blade, some resistance type blades and lift-type blade all are that symmetry axis arranges that some dividing plates axially are divided into the several layers impeller units with impeller integral body along rotating shaft with the rotating shaft.The present invention combines traditional resistance type blade to be designed to an impeller integral body with traditional lift-type blade, by the lift-type blade to obtain bigger wind energy conversion efficiency, simultaneously again by the resistance type blade to obtain less starting wind velocity.Through preliminary simulation, increase is to the qualitative description of wind energy effective conversion, because the lift-type blade is positioned at the outward edge of whole impeller, under the wind-force effect, can produce bigger running torque to whole impeller, opening between resistance type blade and the lift-type blade is actually an air channel, and being provided with on the one hand of this air channel obviously improved lift-type blade wind energy conversion efficiency, has also played the effect of steady impeller rotation on the other hand.The passage that " containing axle ", structural design also provided wind-force to circle round once more and utilize for the air-flow that blows to the resistance type blade between resistance type blade and the rotating shaft has improved the conversion efficiency of resistance type blade to wind energy.In addition, the multilayer insulating panel of impeller of the present invention has also played on Vertical direction to be separated blowing to the impeller air-flow, make the air-flow that blows to impeller blow to resistance type blade and lift-type blade, effectively avoided because the adverse effect that the turbulent flow of air-flow Vertical direction is changed the impeller wind energy efficiency through the different air channel of level height.
In technique scheme, described resistance type blade and lift-type blade are spirality or are lineal shape.Accompanying drawing 1 has provided two groups of blade screw shape impeller overall structure schematic representation.Accompanying drawing 6 has provided three groups of blade lineal shape impeller overall structure schematic representation.
In technique scheme, the horizontal subtended angle α scope of resistance type blade correspondence is that 60 degree are to 100 degree in this impeller; Horizontal subtended angle γ scope 20 degree of lift-type blade correspondence are to 60 degree; The horizontal subtended angle β scope that opening is corresponding between resistance type blade and the lift-type blade is that 20 degree are to 60 degree.Accompanying drawing 5 and accompanying drawing 9 have provided the schematic representation of three horizontal subtended angles.So-called " horizontal subtended angle " be meant resistance type blade or lift-type blade or opening arc section the opening angle of corresponding circle centre position.Learn through preliminary pneumatic experiment, the horizontal subtended angle of resistance type blade correspondence is 80 degree in impeller, the horizontal subtended angle of lift-type blade correspondence is 40 degree, the corresponding horizontal subtended angle of opening also is 40 when spending between resistance type blade and the lift-type blade, and the wind energy conversion efficiency of three groups of blade straight line impellers is higher.
At large-scale or super-huge wind electric impeller, the present invention provides following technological scheme, promptly the needed design of assembling is decomposed in large scale blade, dividing plate, rotating shaft etc.Even described resistance type blade and lift-type blade are made up of some members again, the resistance type vane member is splicing extension mutually in the horizontal direction, the resistance type blade is fixedlyed connected with upper and lower adjacent separator in Vertical direction with the lift-type blade, and each layer dividing plate then fixedlyed connected with rotating shaft.The periphery of described resistance type vane member and lift-type vane member is provided with flange with holes, realizes between the member splicing between member and the dividing plate by rivet.Described dividing plate also is to be assembled by some module components, and the dividing plate center portion is connected and fixed by rivet and flange plate, and flange plate then is connected in the pin key mode with rotating shaft.Described roller end is provided with behind the positioning bearing by mandrel connector again and realizes being connected between rotating shaft and the rotating shaft, so that the impeller axial dimension strengthens, promptly realizes the axial cascade of several layers impeller units.
The wind electric impeller that MW class is above, the size of its blade will surpass tens meters usually, or even tens meters.The blade of large scale is to make the transportation installation all to have quite big difficulty like this.This structure that the present invention provides is at large-scale or super-huge wind electric impeller, taked the strategy of " breaking the whole up into parts ", to impeller carry out on the substantially horizontal and vertical direction on the decomposition assembling, reduce the cost and the difficulty of large-scale or super-huge wind electric impeller manufacturing, transportation, installation.
Advantage of the present invention is:
1, the wind energy conversion efficiency height of the wind electric impeller that provides of the present invention.
The first, wind electric impeller of the present invention organically is combined to resistance type blade and lift-type blade in the same wind electric impeller, given full play under the lift-type blade high wind speed condition, the strong point that the wind energy conversion efficiency is high, also brought into play the less strong point of resistance type blade starting wind velocity, wind electric impeller of the present invention can be used under wind speed variation wind field condition greatly, improved the efficient of impeller integral body the wind energy conversion;
The second, dividing plate of the present invention effectively overcomes the harmful effect of air-flow vertical direction turbulent flow to wind electric impeller to the hierarchy of resistance type blade and lift-type blade, has further improved fan blade integral body to utilization ratio of wind energy;
Three, " void contains " structure of resistance type blade and rotating shaft also makes the wind-force that acts on resistance type blade inboard be circled round and utilizes.
2, the combined type of wind electric impeller of the present invention design, make the very large wind electric impeller of volume both can assemble splicing in the horizontal direction, also can assemble splicing in vertical direction, " collection zero is for whole " greatly reduces the difficulty that the installation aspect is transported in large-scale and super-huge fan blade manufacturing.
Description of drawings
Fig. 1 is two groups of blade screw impellers of the present invention schematic representation.
Fig. 2 is a resistance type blade schematic representation in two groups of blade screw impellers of the present invention.
Fig. 3 is a lift-type blade structure schematic representation in two groups of blade screw impellers of the present invention.
Fig. 4 is two groups of blade screw impellers of the present invention central diaphragm schematic representation.
Fig. 5 is two groups of blade screw impeller assemblings of the present invention schematic representation.
Fig. 6 is three groups of blade straight lines of the present invention impeller schematic representation.
Fig. 7 is three groups of blade straight lines of the present invention impeller resistance type blade schematic representation.
Fig. 8 is three groups of blade straight lines of the present invention impeller lift-type blade schematic representation.
Fig. 9 is three groups of blade straight lines of the present invention impeller dividing plate schematic representation.
Figure 10 is three groups of blade straight lines of the present invention impeller assembling schematic representation.
Figure 11 is Application Example schematic representation of the present invention (two groups of blade screw impeller).
Figure 12 is embodiment's impeller shaft upper end and rack beam mounting structure schematic representation.
Figure 13 is the mounting structure schematic representation between impeller shaft underpart and the load-bearing base.
Figure 14 is the magnetic bearing structure schematic representation.
In the above accompanying drawing, the 1st, spin resistance type blade, the 2nd, opening, the 3rd, spiral lift-type blade, the 4th, dividing plate, the 5th, spin resistance type blade inner member, the 6th, spin resistance type blade middle part member, the 7th, spin resistance type blade outer member, the 8th, spin resistance type vane member level connects flange, the 9th, spin resistance type vane member vertically connects flange, the 10th, spiral lift-type blade connects flange, the 11st, spiral lift-type blade airfoil section, 12 is two groups of blade impeller dividing plate central components, the 13rd, the partition component I, the 14th, the partition component II, the 15th, the partition component III, the 16th, the partition component IV, 17 is two groups of blade dividing plates, the 18th, spiral lift-type blade, the 19th, spiral lift-type blade connects flange, the 20th, spin resistance type blade, the 21st, spin resistance type vane member connects flange, the 22nd, flange plate, the 23rd, straight line resistance type blade, the 24th, the opening between resistance type blade and the lift-type blade, the 25th, lift-type blade, the 26th, dividing plate, the 27th, straight line resistance type blade connects flange, the 28th, straight line lift-type blade connects flange, and the 29th, the aerofoil section of straight line lift-type blade, 30 is three groups of blade impeller dividing plate central components, the 31st, the partition component I, the 32nd, partition component II, the 33rd, partition component III, the 34th, partition component IV, the 35th, straight line resistance type blade, the 36th, opening between straight line resistance type blade and the straight line lift-type blade, the 37th, straight line lift-type blade, 38 is three groups of blade dividing plates, the 39th, wind electric impeller supporting stand, the 40th, bearing cross-beam, the 41st, wind electric impeller rotating shaft, the 42nd, helical runner, the 43rd, ground supporting frame, the 44th, magnetic suspension bearing and generator.
Specific embodiment
Embodiment one:
Present embodiment is two groups of blade screw impellers, its structure as shown in Figure 1, resistance type blade 1 and lift-type blade 3 are separated into six aspects by dividing plate 4, form six air channels being arranged above and below.There is opening 2 between resistance type blade 1 and the lift-type blade 3, also forms the air channel.Single resistance type blade is to be made of the flange 8 mutual assembly units that are connected by substantially horizontal of inner member 5, middle part member 6 and outer member 7, as shown in Figure 2.The flange up and down 9 of resistance type blade and lift-type blade up and down flange 10 respectively by rivet with its above dividing plate be connected with underlay screen, shown in accompanying drawing 2 and accompanying drawing 3.Dividing plate also is to be made of nine module component assembly units, as shown in Figure 4, dividing plate central component 12 has through hole, central component 12 bilateral symmetry are followed successively by partition component (I) 13, partition component (II) 14, partition component (III) 15, partition component (IV) 16, can adopt the flange riveted joint between the partition component, also can adopt adjacent two members dislocation lap joint up and down.Accompanying drawing 5 provides a certain deck structure assembling of present embodiment impeller schematic representation, resistance type blade 20 and lift-type blade 18 riveted with last lower clapboard by flange 9 and 19 up and down, the outer grand face of resistance type blade and lift-type blade is in same round helicoid, the pairing horizontal subtended angle α of resistance type blade is 80 degree, the pairing horizontal subtended angle β of opening is 40 degree between resistance type blade and the lift-type blade, the pairing horizontal subtended angle γ of lift-type blade is 40 degree, as shown in Figure 5.Each layer dividing plate is fixing with flange plate 22 by riveted joint, and flange plate then is by keyway and rotating shaft interlock.When impeller height is bigger, rotating shaft 41 can be divided into several sections up and down, and upper and lower rotating shaft with the bearing location, connects with shaft joint earlier again, thereby guarantees to go up the concentricity of lower rotary shaft.On resistance type blade and lift-type blade, be subjected to wind-force and produce moment, and then be delivered to rotating shaft, drive generator for electricity generation by rotating shaft again by dividing plate, flange plate.
Embodiment two:
Present embodiment is three groups of blade lineal shape impellers, and its structure as shown in Figure 6.Dividing plate 26 is divided into several aspects with straight line resistance type blade 23 and straight line lift-type blade 25, has opening 24 between resistance type blade and the lift-type blade, also forms the air channel.Dividing plate is to be made of the tridecyne component assembly, dividing plate central component 30 has through hole, the symmetrical successively assembly unit partition components in 30 3 limits of triangle center member (I) 31, partition component (II) 32, partition component (III) 33, partition component (IV) 34, straight line resistance type blade 35 and lift-type blade be flange and 38 riveted joints of last lower clapboard about in the of 37, as shown in Figure 10.The horizontal subtended angle α of 35 correspondences of resistance type blade is 80 degree, and the pairing horizontal subtended angle β of opening is 40 degree between resistance type blade and the lift-type blade, and the pairing horizontal subtended angle γ of lift-type blade is 40 degree.Each layer dividing plate is fixing with flange plate 22 by riveted joint, and flange plate then is by keyway and rotating shaft interlock.When impeller height is bigger, rotating shaft 41 can be divided into several sections up and down, and upper and lower rotating shaft with the bearing location, connects with shaft joint earlier again, thereby guarantees to go up the concentricity of lower rotary shaft.On resistance type blade and lift-type blade, be subjected to wind-force and produce moment, and then be delivered to rotating shaft, drive generator for electricity generation by rotating shaft again by dividing plate, flange plate.
Embodiment three:
Present embodiment is the wind-power generating system example.
This exemplary construction as shown in Figure 11.Wind electric impeller stand 39 is based upon on the firm base, the linkage structure of helical runner rotating shaft upper end and bearing cross-beam 40 as shown in Figure 12, this linkage structure hangs on bearing cross-beam with the part weight of impeller, linkage structure between helical runner rotating shaft lower end and the ground supporting frame 43 as shown in Figure 13, below this structure, can also increase an electromagnetism magnetic suspension bearing as shown in figure 14, effectively overcome the weight of huge impeller self with this magnetic suspension bearing, reduce the starting resistance of impeller simultaneously.
Claims (7)
1. combined wind-power impeller, it is characterized in that: this impeller formation includes, resistance type blade, lift-type blade, rotating shaft and dividing plate, near this impeller shaft center portion is provided with the resistance type blade, this impeller outer edge is provided with the lift-type blade, be provided with opening between resistance type blade and the lift-type blade, some resistance type blades and lift-type blade all are that symmetry axis arranges that some dividing plates axially are divided into the several layers impeller units with impeller integral body along rotating shaft with the rotating shaft.
2. a kind of combined wind-power impeller according to claim 1 is characterized in that: described resistance type blade and lift-type blade are spirality or are lineal shape.
3. a kind of combined wind-power impeller according to claim 1 is characterized in that: the horizontal subtended angle scope of resistance type blade correspondence is that 60 degree are to 100 degree; Horizontal subtended angle scope 20 degree of lift-type blade correspondence are to 60 degree; The horizontal subtended angle scope that opening is corresponding between resistance type blade and the lift-type blade is that 20 degree are to 60 degree.
4. a kind of combined wind-power impeller according to claim 1 and 2, it is characterized in that: described resistance type blade and lift-type blade are made up of some members again, the resistance type vane member is splicing extension mutually in the horizontal direction, the resistance type blade is fixedlyed connected with upper and lower adjacent separator in Vertical direction with the lift-type blade, and each layer dividing plate then fixedlyed connected with rotating shaft.
5. a kind of combined wind-power impeller according to claim 4 is characterized in that: the periphery of described resistance type vane member and lift-type vane member is provided with flange with holes, realizes between the member splicing between member and the dividing plate by rivet.
6. a kind of combined wind-power impeller according to claim 4 is characterized in that: described dividing plate is assembled by some module components, and the dividing plate center portion is connected and fixed by rivet and flange plate, and flange plate then is connected in the pin key mode with rotating shaft.
7. a kind of combined wind-power impeller according to claim 6 is characterized in that: described roller end is provided with behind the positioning bearing by mandrel connector again and realizes being connected between rotating shaft and the rotating shaft, so that the impeller axial dimension strengthens.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910028373A CN101787953A (en) | 2009-01-22 | 2009-01-22 | Combined wind-power impeller |
| US12/920,687 US8698340B2 (en) | 2008-03-04 | 2009-03-04 | Wind power system |
| PCT/CN2009/000229 WO2009109107A1 (en) | 2008-03-04 | 2009-03-04 | A wind power generating system |
| EP09717143.3A EP2267299B1 (en) | 2008-03-04 | 2009-03-04 | A wind power generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910028373A CN101787953A (en) | 2009-01-22 | 2009-01-22 | Combined wind-power impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101787953A true CN101787953A (en) | 2010-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910028373A Pending CN101787953A (en) | 2008-03-04 | 2009-01-22 | Combined wind-power impeller |
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| Country | Link |
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| CN (1) | CN101787953A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161671A (en) * | 2011-12-12 | 2013-06-19 | 苏郁夫 | Vertical type wind power generation device |
| CN103775283A (en) * | 2012-10-22 | 2014-05-07 | 北京航空航天大学 | Novel lift-drag complementary type vertical-axis wind turbine |
| CN106286136A (en) * | 2016-08-24 | 2017-01-04 | 六安强力电机有限公司 | A kind of micro wind turbine generator and application thereof |
| CN111255628A (en) * | 2020-03-05 | 2020-06-09 | 合肥托卡拉图科技有限公司 | Vertical axis wind turbine based on new energy |
| CN111615913A (en) * | 2020-05-20 | 2020-09-04 | 浙江中坚科技股份有限公司 | Blind-plugging external inserting line grass mowing head with three flange surfaces |
| CN111791400A (en) * | 2020-04-30 | 2020-10-20 | 株洲时代新材料科技股份有限公司 | Wind power blade mold segmentation compatible design method |
-
2009
- 2009-01-22 CN CN200910028373A patent/CN101787953A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161671A (en) * | 2011-12-12 | 2013-06-19 | 苏郁夫 | Vertical type wind power generation device |
| CN103775283A (en) * | 2012-10-22 | 2014-05-07 | 北京航空航天大学 | Novel lift-drag complementary type vertical-axis wind turbine |
| CN106286136A (en) * | 2016-08-24 | 2017-01-04 | 六安强力电机有限公司 | A kind of micro wind turbine generator and application thereof |
| CN111255628A (en) * | 2020-03-05 | 2020-06-09 | 合肥托卡拉图科技有限公司 | Vertical axis wind turbine based on new energy |
| CN111791400A (en) * | 2020-04-30 | 2020-10-20 | 株洲时代新材料科技股份有限公司 | Wind power blade mold segmentation compatible design method |
| CN111615913A (en) * | 2020-05-20 | 2020-09-04 | 浙江中坚科技股份有限公司 | Blind-plugging external inserting line grass mowing head with three flange surfaces |
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Application publication date: 20100728 |