CN111692050A - Connecting assembly and fan blade comprising same - Google Patents
Connecting assembly and fan blade comprising same Download PDFInfo
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- CN111692050A CN111692050A CN202010626337.9A CN202010626337A CN111692050A CN 111692050 A CN111692050 A CN 111692050A CN 202010626337 A CN202010626337 A CN 202010626337A CN 111692050 A CN111692050 A CN 111692050A
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- 238000009434 installation Methods 0.000 claims abstract description 23
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 239000000945 filler Substances 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims 1
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 description 15
- 238000012423 maintenance Methods 0.000 description 10
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000000712 assembly Effects 0.000 description 6
- 238000000429 assembly Methods 0.000 description 6
- 230000011218 segmentation Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000000463 material 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
- 230000001681 protective effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 230000003245 working 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
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
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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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
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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
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/40—Arrangements or methods specially adapted for transporting wind motor components
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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
- F03D80/50—Maintenance or repair
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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 invention discloses a connecting assembly and a fan blade comprising the same, wherein the connecting assembly is used for connecting two adjacent blade sections of the fan blade and comprises a first connecting piece, a second connecting piece and a fastener, the first connecting piece comprises a first mounting part and a first connecting part, the second connecting piece comprises a second mounting part and a second connecting part, and a first through hole and a second through hole are respectively and correspondingly arranged on the first connecting part and the second connecting part; the first installation part and the second installation part are respectively used for being fixed on the opposite connection surfaces of the two blade sections, and the fasteners can be arranged on the first through holes and the second through holes in a penetrating manner and enable the two opposite side surfaces of the first connection part and the second connection part to be attached and fixedly connected. The connecting assembly can connect and install the ultra-long fan blades in sections, thereby facilitating the transportation of the blades, greatly reducing the transportation difficulty and the transportation cost of the blades and enhancing the competitiveness.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a connecting assembly and a fan blade comprising the same.
Background
According to the power generation cost, the LCOE (normalized electricity cost) is lower when the designed power of a single wind power generator is larger. However, the large-power wind turbine usually means an ultra-long blade, the transportation of the ultra-long blade is difficult, especially for a curved mountain road with a complex terrain, the transportation of a large blade is more difficult, so that the transportation cost is greatly increased, the operation and maintenance cost of the blade accounts for a part of the cost of the whole wind turbine, the transportation cost of the blade is effectively reduced, the cost of the wind turbine is reduced, the operation and maintenance cost of the blade is more and more important for the flat price on-line, and under the condition, the large-power wind turbine blade is manufactured in sections, transported and installed on site.
At present, the sectional blades are various, and mainly comprise a bolt connecting sectional blade, a bonding sectional blade and a clamping sectional blade. Each of the three segmented blades has obvious advantages and disadvantages, and can be selected or rejected according to the characteristics concerned. Although the weight of the blade is increased by the bolt connection, the connection is tighter, and the tensile and shear resistance is strong, so that most of the sectional blades on the market adopt the bolt connection mode. However, most of the existing bolt-connected segmented blades are arranged in the blade between two blade segments through bolts, and operation and maintenance personnel need to climb into the blade cavity for maintenance, so that the maintenance difficulty is high.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a connecting assembly and a fan blade comprising the same.
The invention solves the technical problems through the following technical scheme:
a connecting assembly is used for connecting two adjacent blade sections of a fan blade and comprises a first connecting piece, a second connecting piece and a fastener, wherein the first connecting piece comprises a first mounting part and a first connecting part, the second connecting piece comprises a second mounting part and a second connecting part, and a first through hole and a second through hole are correspondingly formed in the first connecting part and the second connecting part respectively;
the first installation part and the second installation part are used for being fixed on two opposite connection surfaces of the blade sections respectively, and the fastener can be arranged on the first through hole and the second through hole in a penetrating manner and enables the two opposite side surfaces of the first connection part and the second connection part to be attached and fixedly connected.
In this scheme, adopt above-mentioned structural style, can carry out the segmentation connection installation with overlength fan blade through this coupling assembling, not only make things convenient for the transportation of blade, moreover greatly reduced the transportation degree of difficulty and the cost of transportation of blade, reinforcing competitiveness.
Preferably, the first connecting piece and the second connecting piece are identical in structure and size.
In this scheme, adopt above-mentioned structural style, be convenient for production and installation can not take place wrong installation because of the structure is different when the installation.
Preferably, the first mounting portion and the first connecting portion have longitudinal directions perpendicular to each other, and the second mounting portion and the second connecting portion have longitudinal directions perpendicular to each other.
Preferably, the first installation portion and the second installation portion are provided with limiting portions, and the limiting portions are used for preventing the first installation portion and the second installation portion from being separated from the corresponding blade sections.
In this scheme, adopt above-mentioned structural style, avoid fan blade to break away from the blade section at the installation department of during operation coupling assembling, influence the working property of blade.
A fan blade comprising a plurality of blade segments and a plurality of connection assemblies as described above, the plurality of connection assemblies being arranged along a circumferential direction of a connection face of two adjacent blade segments;
the first mounting part and the second mounting part are respectively fixed on the opposite connecting surfaces of the two blade sections, the first connecting part and the second connecting part both extend outwards along the radial direction of the fan blade, and the first through hole and the second through hole are positioned on the outer side of the fan blade;
the fastener is arranged in the first through hole and the second through hole in a penetrating mode, and two opposite side faces of the first connecting portion and the second connecting portion are attached and fixedly connected.
In this scheme, adopt above-mentioned structural style, the fastener setting of the coupling assembling of connecting two blade sections is in the outside of blade, makes the maintenance personal just can maintain the junction of blade outside the blade, avoids the staff to get into the blade cavity in, reduces and maintains the degree of difficulty.
Preferably, the fan blade further comprises a shield, the shield is arranged along the circumferential direction of the fan blade and is used for shielding the connecting assembly in the shield.
In this scheme, adopt above-mentioned structural style, not only can reduce the pneumatic performance loss that the segmentation department of two blade sections takes place air current mutual interference and pneumatic discontinuity to cause, can also avoid external environment to corrode coupling assembling, increase fan blade's life.
Preferably, the outer surface of the shield is in a streamline structure.
In this scheme, adopt above-mentioned structural style, the guard shield that has streamlined structure based on fluid mechanics design, this is the wing section aerodynamic performance who has considered two blade section junctions because of the discontinuous phenomenon that geometry and aerodynamic discontinuity caused, and what adopt is streamlined design, so can not lead to the fact too big resistance to fan blade whole at the blade section junction, also can not lead to the fact too big influence to the aerodynamic performance of segmentation.
Preferably, the fan blade further comprises an anti-shearing prism, two ends of the anti-shearing prism are respectively located in two adjacent blade sections, and two opposite side surfaces of the anti-shearing prism are respectively fixed with a front edge web and a rear edge web in the fan blade.
In this scheme, adopt above-mentioned structural style, the anti shear rigidity of reinforcing fan blade segmentation department avoids fan blade to take place the fracture.
Preferably, elastic fillers are arranged between two side faces of the anti-shearing prism, which are opposite to the windward face and the leeward face of the fan blade, and the inner wall face of the fan blade.
In this scheme, adopt above-mentioned structural style, make to have the buffering between blade internal wall face and the anti-shear prism, avoid causing the damage to the blade internal wall face.
Preferably, the anti-shearing prism is a cuboid, and the length of the anti-shearing prism in the chord direction of the airfoil shape of the fan blade is smaller than the length of the airfoil shape in the thickness direction.
In this scheme, adopt above-mentioned structural style, further strengthen the shear strength of fan blade segmentation department.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: the connecting assembly can connect and install the ultra-long fan blades in sections, thereby facilitating the transportation of the blades, greatly reducing the transportation difficulty and the transportation cost of the blades and enhancing the competitiveness. The fastener of the connecting assembly for connecting the two blade sections is arranged outside the blade, so that maintenance personnel can maintain the joint of the blade outside the blade, the working personnel is prevented from entering the cavity of the blade, and the maintenance difficulty is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a connecting assembly according to a preferred embodiment of the invention.
Fig. 2 is a schematic structural view of the connecting assembly according to the preferred embodiment of the invention after assembly.
FIG. 3 is a schematic structural view of a fan blade according to a preferred embodiment of the present invention.
FIG. 4 is a schematic view of the structural installation of a fan blade according to a preferred embodiment of the present invention.
FIG. 5 is a cross-sectional view of a fan blade in accordance with a preferred embodiment of the present invention.
Fig. 6 is a schematic structural view of a connecting assembly according to another embodiment of the present invention.
Description of reference numerals:
First connecting member 1
First mounting part 11
First through-hole 121
Second connecting piece 2
Second mounting part 21
Second connecting part 22
Second via 221
Single-headed bolt 3b
Second blade segment 6
Second connection surface 61
Shear resistant prism 8
Trailing edge web 10
Elastic filler 20
Detailed Description
The present invention is further illustrated by the following specific examples, but is not limited thereby in the scope of the following examples.
As shown in fig. 1 and 2, a connection assembly 100 of the present embodiment is used to connect two adjacent blade segments of a fan blade, where the connection assembly 100 is used to connect two adjacent blade segments. The connecting assembly 100 comprises a first connecting piece 1, a second connecting piece 2 and a fastener, wherein the first connecting piece 1 comprises a first mounting part 11 and a first connecting part 12, the second connecting piece 2 comprises a second mounting part 21 and a second connecting part 22, and a first through hole 121 and a second through hole 221 are correspondingly arranged on the first connecting part 12 and the second connecting part 22 respectively; the first mounting portion 11 and the second mounting portion 21 are respectively used for being fixed on the opposite connecting surfaces of the two blade sections, and fasteners can be arranged in the first through hole 121 and the second through hole 221 in a penetrating manner to enable the opposite side surfaces of the first connecting portion 12 and the second connecting portion 22 to be attached and fixedly connected.
This coupling assembling 100 can carry out the segmentation connection installation with super long fan blade, not only makes things convenient for the transportation of blade, moreover greatly reduced the transportation degree of difficulty and the cost of transportation of blade, reinforcing competitiveness.
As shown in fig. 1 and 2, in the present embodiment, the first connecting member 1 and the second connecting member 2 are identical in structure and size. Therefore, the production and installation are convenient, and the wrong installation caused by different structures can not occur during the installation.
Of course, in other embodiments, the structures and the dimensions of the first connecting member 1 and the second connecting member 2 may also be different, and the design may be specifically performed according to the properties of the used materials, the size of the cross section of the connecting surface of the blade segment, and other factors, and thus, details are not described herein.
As shown in fig. 1 and 2, in the present embodiment, the first mounting portion 11 and the first connecting portion 12 have longitudinal directions perpendicular to each other, and the second mounting portion 21 and the second connecting portion 22 have longitudinal directions perpendicular to each other. Of course, in other embodiments, the first mounting portion 11 and the first connecting portion 12 may not be perpendicular, and the second mounting portion 21 and the second connecting portion 22 may not be perpendicular, so long as the two opposite side surfaces of the first connecting portion 12 and the second connecting portion 22 are attached to each other when the first mounting portion 11 and the second mounting portion 21 are mounted on the blade section.
The first mounting portion 11 and the second mounting portion 21 each have a limiting portion for preventing the first mounting portion 11 and the second mounting portion 21 from disengaging from the corresponding blade segment. The limiting parts are arranged to prevent the fan blade from being separated from the blade segment when the fan blade works in the mounting part of the connecting component 100, and the working performance of the blade is affected.
Specifically, as shown in fig. 1 and 2, in the present embodiment, the mounting portions of the first connecting member 1 and the second connecting member 2 are both cylindrical structures, one end of each cylindrical structure is provided with a connecting portion having a square structure, and the other end of each cylindrical structure is provided with an annular protrusion, which is a limiting portion.
Of course, in other embodiments, the limiting portion may be of other structural types, or the mounting portion may be of a frustum structure, the connecting portion is disposed at the end with the smaller cross section of the frustum structure, and the end with the larger cross section of the frustum structure disposed in the blade segment may be subjected to a resistance action and may not slide out.
The first installation part 11 and the second installation part 21 of the first connecting piece 1 and the second connecting piece 2 are installed in the blade segments in a pre-embedded mode, namely the blade segments are correspondingly fixed on the two blade segments by the first connecting piece 1 and the second connecting piece 2 during production.
As shown in fig. 3 and 4, the embodiment of the present invention also discloses a fan blade, which includes a plurality of blade segments and a plurality of connecting assemblies 100 as above, wherein the plurality of connecting assemblies 100 are arranged along the circumferential direction of the connecting surface of two adjacent blade segments; the first mounting part 11 and the second mounting part 21 are respectively fixed on the opposite connecting surfaces of the two blade sections, the first connecting part 12 and the second connecting part 22 both extend outwards along the radial direction of the fan blade, and the first through hole 121 and the second through hole 221 are positioned on the outer side of the fan blade; the fastener is inserted into the first through hole 121 and the second through hole 221, and the opposite sides of the first connecting portion 12 and the second connecting portion 22 are engaged and fixedly connected.
As shown in fig. 4, the motor blade has a first blade segment 5 and a second blade segment 6 that need to be connected, the first blade segment 5 and the second blade segment 6 respectively have a first connecting surface 51 and a second connecting surface 61 that are arranged oppositely, the first connecting member 1 is fixedly mounted on the first connecting surface 51, the second connecting member 2 is fixedly mounted on the second connecting surface 61, the first connecting member 1 is aligned with the corresponding second connecting member 2, and the fastening member is a bolt-nut assembly, in this embodiment, the bolt is a stud bolt 3a with two threaded ends, two ends of the stud bolt 3a respectively pass through the through holes 121 and 221 on the two connecting members 1 and 2, and the connecting portions of the two connecting members 1 and 2 are attached to each other, and two ends of the stud bolt 3a are fastened by the two nuts 4.
Of course, as shown in fig. 6, in other embodiments, the bolt may be a single-headed bolt 3b, and the single-headed bolt 3b is inserted through the first through hole and the second through hole and then fixed by the nut 4.
In this embodiment, the fastener of the connection assembly 100 connecting the first blade section 5 and the second blade section 6 is arranged outside the blade, so that a maintenance worker can maintain the connection part of the blade outside the blade, the worker is prevented from entering the cavity of the blade, and the maintenance difficulty is reduced.
In other embodiments, a ring of flange-shaped connecting members may be provided on the outer periphery of the end of the first blade segment 5 near the end of the second blade segment 6, the outer edge of the flange-shaped connecting members may be provided with a ring of through holes distributed along the circumferential direction of the flange-shaped connecting members, the flange-shaped connecting members may be fixed to the outer peripheral surface of the end of the first blade segment 5 or the first connecting surface 51 by welding or the like, in this case, the end of the flange-shaped connecting members fixed to the first blade segment 5 corresponds to the mounting portion, and the end having the through holes corresponds to the connecting portion. The second connecting pieces 2 are of L-shaped structures, the second installation parts 21 of the second connecting pieces 2 are installed in the second blade sections 6 in a pre-embedded mode, and the second through holes 221 in the second connecting parts 22 of the second connecting pieces 2 correspond to the through holes in the flange-shaped connecting pieces one by one and are fixedly connected through bolts.
Of course, in other embodiments, a flange-like connection may also be provided on the second blade section 6, the first blade section 5 then being an L-shaped first connection 1. Alternatively, the first blade segment 5 and the second blade segment 6 are each provided with a flange-like connection member and then fixed by bolting.
As shown in fig. 5, in the present embodiment, the fan blade further includes a shroud 7, and the shroud 7 is disposed along the circumferential direction of the fan blade and is used for shielding the connection assembly 100 inside the shroud 7. Set up guard shield 7 and not only can reduce the pneumatic performance loss that the pneumatic discontinuity caused that the air current is disturbed each other and is taken place in the junction of first blade section 5 and second blade section 6, can also avoid external environment to corrode coupling assembling 100, increase fan blade's life.
The outer surface of the protective cover 7 is of a streamline structure, the protective cover 7 with the streamline structure is designed based on hydrodynamics, the discontinuity phenomenon of the airfoil aerodynamic performance at the joint of the first blade section 5 and the second blade section 6 caused by geometric and aerodynamic discontinuity is considered, the streamline design is adopted, so that too large resistance cannot be caused to the whole fan blade at the joint of the blade sections, and too large influence cannot be caused to the aerodynamic performance at the joint of the blade sections.
The cover 7 can completely cover all the connection assemblies 100, so that the connection assemblies 100 are not exposed. The connection mode of guard shield 7 and the surface of blade is for bonding, and bonding strength is as the case may be decided, only needs to guarantee when maintaining coupling assembling 100, conveniently pulls down guard shield 7 and the blade can not drop in daily operation.
As shown in fig. 4 and 5, in the present embodiment, the fan blade further includes an anti-shear prism 8, two ends of the anti-shear prism 8 are respectively located in two adjacent first blade segments 5 and second blade segments 6, and two opposite side surfaces of the anti-shear prism 8 are respectively fixed with a leading edge web 9 and a trailing edge web 10 in the fan blade. The shear-resistant prism 8 can enhance the shear-resistant rigidity of the fan blade segment, and the fan blade is prevented from being broken.
The shear-resistant prism 8 is fixed at the connecting end surfaces of the front edge web 9 and the rear edge web 10 in the first blade segment 5 and the second blade segment 6 through a plurality of positioning pins, so that the shear-resistant prism 8 can be reinforced, and the damage to the inner wall surface of the blade caused by the insecure fixation of the shear-resistant prism 8 can be prevented.
As shown in fig. 5, in the present embodiment, an elastic filler 20 is provided between both side surfaces of the shear resistant prism 8 facing the windward and leeward surfaces of the fan blade and the inner wall surface of the fan blade. The elastic filler 20 can buffer the space between the inner wall surface of the blade and the shear resistant prism 8, and avoid damaging the inner wall surface of the blade. The elastic filler 20 is arranged on the end face of the anti-shearing prism 8 closer to the inner wall surface of the blade, and the material type of the elastic filler 20 is set according to the requirement of the blade manufacturing process.
In this embodiment, the anti-shearing prism 8 is a cuboid, and the length of the anti-shearing prism 8 in the chord direction of the airfoil of the fan blade is smaller than the length of the airfoil in the thickness direction. This may further enhance the shear stiffness at the fan blade section.
The ratio of the length of the section of the anti-shearing prism 8 in the spanwise direction of the blade in the chord direction of the airfoil profile to the length of the section of the airfoil profile in the thickness direction of the airfoil profile is reversely deduced from the shearing rigidity required at the segmented joint of the first blade segment 5 and the second blade segment 6 in combination with the shearing stress applied to the stud bolts 3 of the connecting component 100 according to the structural design process of the blade, and the sum of the shearing stress applied to the anti-shearing prism 8 and the shearing stresses applied to the stud bolts 3 of the connecting components 100 meets the structural design requirement of the blade.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. A connecting assembly is used for connecting two adjacent blade sections of a fan blade and is characterized by comprising a first connecting piece, a second connecting piece and a fastening piece, wherein the first connecting piece comprises a first mounting part and a first connecting part, the second connecting piece comprises a second mounting part and a second connecting part, and a first through hole and a second through hole are correspondingly formed in the first connecting part and the second connecting part respectively;
the first installation part and the second installation part are used for being fixed on two opposite connection surfaces of the blade sections respectively, and the fastener can be arranged on the first through hole and the second through hole in a penetrating manner and enables the two opposite side surfaces of the first connection part and the second connection part to be attached and fixedly connected.
2. The connection assembly of claim 1, wherein the first connector and the second connector are identical in construction and size.
3. The connection module of claim 1, wherein the first mounting portion and the first connection portion have lengthwise directions that are perpendicular to each other, and the second mounting portion and the second connection portion have lengthwise directions that are perpendicular to each other.
4. The connection assembly of claim 1, wherein the first and second mounting portions each have a spacing portion for preventing the first and second mounting portions from disengaging from the corresponding blade segment.
5. A fan blade, comprising a plurality of blade segments and a plurality of connecting members according to any of claims 1 to 4, the plurality of connecting members being arranged in a circumferential direction of a connecting surface of two adjacent blade segments;
the first mounting part and the second mounting part are respectively fixed on the opposite connecting surfaces of the two blade sections, the first connecting part and the second connecting part both extend outwards along the radial direction of the fan blade, and the first through hole and the second through hole are positioned on the outer side of the fan blade;
the fastener is arranged in the first through hole and the second through hole in a penetrating mode, and two opposite side faces of the first connecting portion and the second connecting portion are attached and fixedly connected.
6. The fan blade of claim 5 further comprising a shroud disposed circumferentially about the fan blade and configured to shroud the connection assembly within the shroud.
7. The fan blade of claim 6 wherein the outer surface of the shroud is in the form of a streamline.
8. The fan blade of claim 5 further comprising an anti-shear prism having ends respectively located in two adjacent blade segments, opposite sides respectively secured to a leading edge web and a trailing edge web in the fan blade.
9. The fan blade of claim 8 wherein an elastomeric filler is disposed between the opposing sides of the shear prism opposite the windward and leeward sides of the fan blade and the inner wall of the fan blade.
10. The fan blade as in claim 8, wherein the shear prism is a cuboid, and wherein the length of the shear prism in the chordwise direction of the airfoil of the fan blade is less than the length of the airfoil in the thickness direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010626337.9A CN111692050A (en) | 2020-07-01 | 2020-07-01 | Connecting assembly and fan blade comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010626337.9A CN111692050A (en) | 2020-07-01 | 2020-07-01 | Connecting assembly and fan blade comprising same |
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| CN111692050A true CN111692050A (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010626337.9A Pending CN111692050A (en) | 2020-07-01 | 2020-07-01 | Connecting assembly and fan blade comprising same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339189A (en) * | 2021-08-04 | 2021-09-03 | 常州市宏发纵横新材料科技股份有限公司 | Sectional type wind-powered electricity generation blade convenient to butt joint |
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| CN202628407U (en) * | 2012-06-26 | 2012-12-26 | 昆明理工峰潮科技有限公司 | Sectional type wind driven generator blade |
| CN102926945A (en) * | 2012-11-13 | 2013-02-13 | 中国科学院工程热物理研究所 | Multi-segment wind turbine blade connected by U-shaped strengthening devices and assembling method thereof |
| CN203051006U (en) * | 2012-12-05 | 2013-07-10 | 上海万德风力发电股份有限公司 | Blade of high-power wind generator |
| CN103470456A (en) * | 2013-09-23 | 2013-12-25 | 华北电力大学（保定） | Sectional wind power generation blade with interchangeability |
| CN104976051A (en) * | 2014-04-11 | 2015-10-14 | 西门子公司 | Segmented rotor blade with a bolt connection |
| US9777704B2 (en) * | 2014-11-03 | 2017-10-03 | General Electric Company | Rotor blade assembly for a wind turbine having variable-length blade bolts |
| CN205689356U (en) * | 2016-06-02 | 2016-11-16 | 三一重型能源装备有限公司 | Wind-driven generator and combinations thereof blade |
| CN110268155A (en) * | 2016-12-28 | 2019-09-20 | 维斯塔斯风力系统有限公司 | Jointing and correlation technique for segmented wind turbine rotor blade |
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| CN113339189A (en) * | 2021-08-04 | 2021-09-03 | 常州市宏发纵横新材料科技股份有限公司 | Sectional type wind-powered electricity generation blade convenient to butt joint |
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Application publication date: 20200922 |