CN110966139A - Method and structure for embedding blades of wind driven generator - Google Patents
Method and structure for embedding blades of wind driven generator Download PDFInfo
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- CN110966139A CN110966139A CN201911410241.2A CN201911410241A CN110966139A CN 110966139 A CN110966139 A CN 110966139A CN 201911410241 A CN201911410241 A CN 201911410241A CN 110966139 A CN110966139 A CN 110966139A
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- driven generator
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000006260 foam Substances 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims description 16
- 239000003365 glass fiber Substances 0.000 claims description 14
- 239000004744 fabric Substances 0.000 claims description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 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
- 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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- 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)
- Wind Motors (AREA)
Abstract
The utility model provides a pre-buried method of aerogenerator blade and structure, the outside thread of bolt cover designs into the arc, connect the foam strip after the end seals and form bolt foam strip wholly, bolt foam strip wholly sets up with both sides are convex wedge strip interval arrangement in proper order, and make the top terminal surface of bolt cover outstanding aerogenerator blade terminal surface, the terminal surface and the aerogenerator blade terminal surface parallel and level of wedge strip, it is the inclined plane respectively to set up one side in the both sides of half face joint seam, the opposite side is curved half wedge strip, polish the terminal surface at bolt cover top and make whole tip parallel and level. The invention adopts the mode that the wedge-shaped strips are arranged on the two sides of the whole body formed by the bolt sleeve and the foam strips, simplifies the pre-buried structure of the wind driven generator blade, accelerates the forming efficiency, is easy to operate, can improve important connection tolerance such as the verticality and the coaxiality of the blade root connecting bolt, and improves the connection precision of the wind driven generator blade and the wind driven generator set, thereby improving the connection reliability between the wind driven generator set and the blade.
Description
Technical Field
The invention relates to a blade pre-embedding method and structure, in particular to a wind driven generator blade pre-embedding method and structure, and belongs to the field of composite material blade pre-embedding structures of wind driven generator sets.
Background
The wind generating set comprises a tower barrel fixedly arranged, an engine room supported by the tower barrel, a hub fixedly connected with a main shaft of the engine room, and blades arranged on the hub. The part of the blade fixedly connected with the hub is a blade root, the part of the blade furthest away from the hub is a blade tip, and the connection between the blade root and the variable-pitch bearing usually has two modes: t-shaped punching and embedded bolt sleeve type. Along with the increase of the length of the blade, the megawatt level of the wind generating set is improved, the load of the blade is continuously increased, more and more blades are transited to a pre-embedded bolt sleeve connection mode from a traditional T-shaped punching connection mode, so that more connecting bolts are arranged at the blade root, and the blade root connecting bolts are guaranteed to have enough ultimate strength and fatigue strength.
The embedded component mainly comprises a metal bolt sleeve, a wedge-shaped UD rod and a wedge-shaped foam strip made of PVC materials. The whole embedded assembly is assembled in the blade during blade molding and integrally poured and molded with the blade.
For example, the invention patent with the application number CN2013100239963 and the name of megawatt wind turbine blade root screw pre-embedding process method discloses a megawatt wind turbine blade root screw pre-embedding process method, which comprises the following steps: aligning the center of each flange hole of the blade root flange plate with the center of each hole of the die flange; penetrating a pre-buried screw rod into a flange hole of a blade root flange plate, and fixing the pre-buried screw rod by using a nut; sleeving the UD sleeve on the embedded screw; penetrating a bolt sleeve into the UD sleeve; penetrating the pre-buried screw rod into the bolt sleeve and screwing; penetrating the threaded end of the bolt sleeve into the PVC wedge; clamping the PVC wedge on the outer side of the UD belt, and compacting the UD belt and the PVC wedge; and placing the UD rod on the inner side of the UD belt, filling the UD rod between adjacent bolt sleeves, tamping the UD rod by using a hammer, and filling gaps among the UD belt, the UD rod and the bolt sleeves by using UD wires.
The invention patent with the application number of CN2012102028110, namely 'embedded bolt, prefabricated blade root, blade and forming method thereof and wind generating set' discloses an embedded bolt, a prefabricated blade root, a blade and forming method thereof and a wind generating set, wherein the embedded bolt comprises a rod-shaped threaded part and an embedded part which are integrally formed, the threaded part is provided with an external thread, and the tail part of the embedded part is provided with a bulge extending outwards; the threaded portion is used for extending out of a prefabricated blade root of the wind turbine generator blade, and the embedded portion is used for being embedded and fixed inside the prefabricated blade root. The embedded bolt provided by the technical scheme can keep the strength and the rigidity of the initial design at the blade root to the maximum extent only by fastening and connecting the protrusion of the embedded part and the prefabricated blade root. Meanwhile, the tensile strength and the torsion resistance of the bolt can be effectively improved, the embedded depth of the bolt can be designed to be shallower, the additional mass of the blade is increased as small as possible, and therefore the design of the blade is optimized.
The blade root embedded structure has the following defects:
(1) the existing tooth form on the outer surface of the embedded bolt sleeve is trapezoidal, and stress of circumferential fibers among teeth is concentrated, so that blades wrapped at the trapezoidal corners of the outer tooth form after being poured are easy to damage, the fiber strength is reduced, and the strength of the whole blade root is reduced;
(2) when the embedded bolt sleeve is embedded into the blade of the wind driven generator, 2 wedge-shaped strips and 4 small wedge-shaped strips are needed to be arranged around one embedded bolt sleeve. Due to the design of the wedge-shaped strips, construction is complicated when the embedded blades are formed. In addition, the 7 parts are mutually independent before the blade is formed, and the densities are different, so that the embedded bolt sleeve sinks due to the heavy weight of the embedded bolt sleeve in the blade forming process, the problem that the upper surface of the embedded bolt sleeve is rich in resin is easily caused, and the embedded structural strength of the embedded blade root is further influenced.
Therefore, a new blade root bolt embedded structure is needed, which can effectively solve the above disadvantages and improve the strength of the embedded structure of the blade root and the blade root.
Disclosure of Invention
The invention provides a method and a structure for embedding a blade of a wind driven generator, aiming at solving the problems of low strength, complex structure and complicated construction in the existing blade root embedded structure, and the method and the structure can improve the forming efficiency of the embedded blade, are easy to operate, improve the strength of the embedded structure of the blade root of the embedded blade and improve the connection reliability between a wind driven generator set and the blade.
The technical means adopted by the invention to solve the problems are as follows: the utility model provides a aerogenerator blade pre-buried method, the outside thread of bolt cover designs into the arc, connect the foam strip after the end seals and form bolt foam strip wholly, bolt foam strip wholly sets up for convex wedge strip with both sides interval arrangement in proper order, and make the top terminal surface of bolt cover outstanding aerogenerator blade terminal surface, the terminal surface and the aerogenerator blade terminal surface parallel and level of wedge strip, it is the inclined plane respectively to set up one side in the both sides that half face closed the seam, the opposite side is curved half wedge strip, the terminal surface at bolt cover top is polished and is made whole tip parallel and level.
Further, the arc radiuses of the wedge-shaped strips and the semi-wedge-shaped strips are designed to be larger than the outer diameter of the bolt sleeve, and the wedge-shaped strips or the semi-wedge-shaped strips are arranged in a matched mode after the glass fiber yarns are wound on the outer side of the bolt sleeve.
Further, the height of the wedge-shaped strip is designed to be smaller than the outer diameter of the bolt sleeve, and when the generator blade is molded and layered, the laid glass fiber cloth forms a wave form on the surfaces of the wedge-shaped strip or the semi-wedge-shaped strip and the bolt sleeve along the circumferential direction of the blade.
A wind driven generator blade embedded structure comprises semi-wedge-shaped strips arranged at two side ends, a bolt sleeve and wedge-shaped strips which are arranged along an arc shape are sequentially matched between the two semi-wedge-shaped strips, wherein one side of each semi-wedge-shaped strip is an arc surface, one side opposite to the arc surface is an inclined surface, two opposite sides of each wedge-shaped strip are arc surfaces, a foam strip is connected to the tail end of a blade tip part of the bolt sleeve after sealing, the arc surfaces of the semi-wedge-shaped strips are closely matched with the bolt sleeve, and the arc surfaces at two sides of each wedge-shaped strip are closely matched; the tooth shape of the outer surface of the bolt sleeve is arc-shaped, and when the bolt sleeve is matched with the wedge-shaped strip or the semi-wedge-shaped strip, the end face of the top of the bolt sleeve protrudes out of the end face of the wind driven generator blade, and the end face of the wedge-shaped strip or the semi-wedge-shaped strip is flush with the end face of the wind driven generator blade.
Further, the radius of the semi-wedge-shaped strips and the cambered surfaces of the wedge-shaped strips is larger than the outer radius of the bolt sleeve.
Further, the heights of the half wedge-shaped strips and the wedge-shaped strips are smaller than the outer diameter of the bolt sleeve.
Furthermore, the upper and lower surfaces of the half wedge-shaped strips and the wedge-shaped strips are in arc transition with the cambered surfaces of the side surfaces.
Further, the thickness of the tail part of the half wedge-shaped strip is larger than that of the head part.
Further, the tail part of the bolt sleeve on the blade tip side is provided with a sealing structure.
Further, the sealing structure comprises a T-shaped rear cover in interference sealing fit with the T-shaped counter bore of the bolt sleeve.
Further, the sealing structure also comprises an O-shaped sealing ring arranged between the rear cover and the bolt sleeve.
The invention has the beneficial effects that:
1. the invention adopts the mode that the wedge-shaped strips or the half wedge-shaped strips are arranged on the two sides of the whole body formed by the bolt sleeve and the foam strips, simplifies the pre-embedded structure of the wind driven generator blade, accelerates the forming efficiency and is easy to operate, can improve important connection tolerance such as the perpendicularity and the coaxiality of the blade root connecting bolt, and improves the connection precision of the wind driven generator blade and the wind driven generator set, thereby improving the connection reliability between the wind driven generator set and the blade.
2. The thread shape on the outer surface of the bolt sleeve is arc-shaped, so that stress concentration of circumferential fibers among the threads is avoided, and the connection strength of the embedded structure is increased.
3. The end face of the top of the bolt sleeve protrudes out of the end face of the wind driven generator blade, and the end face of the wedge-shaped strip or the semi-wedge-shaped strip is flush with the end face of the wind driven generator blade.
4. The radius of the semi-wedge-shaped strip and the cambered surface of the wedge-shaped strip is larger than the outer radius of the bolt sleeve, when the semi-wedge-shaped strip and the cambered surface of the wedge-shaped strip are jointed and matched after the glass fiber is wound on the outer side of the bolt sleeve, the wedge-shaped strip and the semi-wedge-shaped strip are also made of glass fiber materials, and can be better jointed with the bolt sleeve wound with the glass fiber, so that the strength of the whole embedded structure is improved.
5. The height of the semi-wedge-shaped strips and the wedge-shaped strips is smaller than the outer diameter of the bolt sleeve, so that when the wind driven generator blade is molded and layered, the glass fiber cloth forms a wave form at the outer sides of the semi-wedge-shaped strips or the wedge-shaped strips and the bolt sleeve along the circumferential direction of the blade, and resin enrichment caused by the fact that a gap between the bolt sleeve and the wedge-shaped strips or the semi-wedge-shaped strips is too large and resin filling is needed is avoided.
6. The thickness of the tail part of the half wedge-shaped strip at the blade tip side is larger than that of the end part of the blade root, so that the phenomenon that the clearance at the die closing seam is too large due to sinking of the tail part of the half wedge-shaped strip is avoided.
Drawings
FIG. 1 is a schematic front view of an overall structure of an embodiment;
FIGS. 2 and 3 are enlarged partial views of FIG. 1;
FIG. 4 is a schematic view of an assembly structure of a bolt sleeve and a foam strip and a wedge strip according to an embodiment;
FIG. 5 is a cross-sectional view of a bolt sleeve according to an embodiment;
FIG. 6 is an enlarged view of a portion of FIG. 5;
FIG. 7 is a schematic cross-sectional view of FIG. 4;
FIG. 8 is a schematic perspective view of a half wedge bar according to an embodiment;
FIG. 9 is a schematic front view of one half of a wedge bar of an embodiment;
in the figure: 1. the bolt comprises a half wedge-shaped strip, 2 wedge-shaped strips, 3 bolt sleeves, 31 rear covers, 32 counter bores, 33 sealing rings and 4 foam strips.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
A blade embedded structure of a wind driven generator comprises half wedge-shaped strips 1, wedge-shaped strips 2, bolt sleeves 3 and foam strips 4, wherein as shown in figures 1-3, two symmetrical half wedge-shaped strips 1 are arranged at two ends of the embedded structure, and one strip is arranged at each end. The bolt sleeve 3 and the wedge-shaped strips 2 are sequentially matched and arranged along the arc shape between the two half wedge-shaped strips 1, and the two half wedge-shaped strips 1 are matched with the bolt sleeve 3 on one side.
As shown in fig. 4, both sides of the wedge-shaped strip 2 are a plane with a concave arc surface on the upper surface, a plane on the lower surface and a wedge shape on the upper surface near the tip of the blade at the part near the tip of the blade, and the wedge-shaped strip 2 is closely matched with the bolt sleeve 3 at the two arc surfaces.
The two half wedge-shaped strips 1 have only one cambered surface, the structure of the two half wedge-shaped strips is similar to the structure of dividing a complete wedge-shaped strip 2 into two halves along the upper surface and the lower surface, and the difference between the two half wedge-shaped strips 2 in the embodiment is that: as shown in fig. 8 and 9, the thickness H1 of the half wedge-shaped strip 1 at the head is greater than the thickness H2 at the tail, and when the tail sinks after the whole embedded structure is embedded in the blade root, the thickness H2 of the tail of the half wedge-shaped strip 1 can compensate, so that the gap between two sides of the die closing seam of the blade is prevented from being too large.
The upper surface and the lower surface of the wedge-shaped strip 2 and the cambered surface of the side surface of the semi-wedge-shaped strip 1 are in arc transition, so that the transition edge is prevented from being worn easily when being too sharp, and the glass fiber cloth on the upper surface and the lower surface is prevented from being damaged.
As shown in fig. 6, the thread profile of the outer side of the bolt sleeve 3 is arc-shaped, so that the stress concentration of the circumferential fibers between teeth is avoided from cracking, and the tooth pitch L is set to be 6-8mm, so that the connection strength of the embedded structure is further increased. As shown in fig. 5, a T-shaped rear cover 31 is disposed at an end of the bolt sleeve 3 close to the blade tip, the rear cover 31 is in interference sealing fit with a T-shaped counter bore 32 at the end of the bolt sleeve 3, an O-shaped sealing ring 33 is further disposed between the rear cover 21 and the counter bore 32, the end of the bolt sleeve 3 is sealed with high strength by the interference fit and the O-shaped sealing ring 33, so as to prevent glue from entering an inner cavity of the bolt sleeve 3 when the blade is molded and poured, wherein the rear cover 21 may be made of a metal material, or a plastic or rubber which can resist a temperature of more than 100 ℃. As shown in fig. 4, the end of the sealed bolt sleeve 3 is connected with a wedge-shaped foam strip 4, the connection part of the foam strip 4 and the bolt sleeve 3 is cylindrical, the part on the blade tip side is wedge-shaped, and the bolt sleeve 3 and the foam strip 4 are integrated and then matched with the wedge-shaped strip 2 or the semi-wedge-shaped strip 1 to form a complete embedded structure.
As shown in fig. 7, the radius R2 of the arc surfaces of the wedge-shaped strips 2 and the half wedge-shaped strips 1 is larger than the outer radius R1 of the bolt sleeve 3 by about 3-4mm, in the pre-embedding process, the glass fiber wires are wound on the surface of the bolt sleeve 3 and then are matched with the wedge-shaped strips 2 or the half wedge-shaped strips 1, at the moment, the whole outer radius of the bolt sleeve 3 can be increased, the radius of the arc surfaces of the wedge-shaped strips 2 and the half wedge-shaped strips 1 is larger than the outer radius of the bolt sleeve 3, the glass fiber wires wound on the outer side of the bolt sleeve 3 can be more tightly attached to the wedge-shaped strips 2 or the half wedge-shaped strips 1 made of the same material, and the bonding force between the bolt sleeve 3 and.
As shown in fig. 4, in the process that the bolt sleeve 3 is matched with the wedge-shaped strip 2 or the semi-wedge-shaped strip 1, the end face of the bolt sleeve 3 protrudes out of the end face of the wind driven generator blade by 3-5mm, the end face of the wedge-shaped strip 2 or the semi-wedge-shaped strip 1 is flush with the end face of the wind driven generator blade, and the cambered surface of the wedge-shaped strip 2 or the semi-wedge-shaped strip 1 is sequentially matched with the outer diameter of the. Because 3 terminal surfaces of bolt housing and wedge strip 2 or half wedge strip 1's terminal surface itself is unevenness, and in the blade root with become the connected process of oar bearing, it is very level in order to improve the fatigue life who connects the screw rod to connect the face requirement, therefore, need polish to connecting the face, if 3 terminal surfaces of bolt housing and wedge strip 2 or half wedge strip 1's terminal surface parallel and level or wedge strip 2 and half wedge strip 1's terminal surface is higher than 3 terminal surfaces of bolt housing, and when polishing wedge strip 2 or half wedge strip 1 surface, the high temperature that polisher high-speed rotational friction produced probably leads to the wedge strip 2 or half wedge strip 1 of glass fiber material to burn, but then can not appear this problem when polishing 3 terminal surfaces of bolt housing to the metal material.
As shown in FIGS. 4 and 7, the height H of the wedge-shaped strip 2 or the half wedge-shaped strip 1 is about 2-3mm smaller than the outer diameter D of the thread bushing 3, so that when the wind turbine blade is formed into a laminate, the laid glass fiber cloth is generated into a wave form in the circumferential direction of the blade as shown in FIG. 7. When the height H of the wedge-shaped strip 2 or the half wedge-shaped strip 1 is equal to the outer diameter D of the thread bushing 3, the phenomenon that the gap is large or more glue needs to be filled between the wedge-shaped strip 2 or the half wedge-shaped strip 1 and the thread bushing 3 to cause resin enrichment due to the fact that the cambered surface radius R2 of the wedge-shaped strip 2 or the half wedge-shaped strip 1 is larger than the outer radius R1 of the thread bushing 3 is avoided, and the performance of the blade is affected.
The embodiment also relates to a wind driven generator blade embedding method, wherein the outer side thread of the bolt sleeve 3 is designed into an arc shape, the outer side of the bolt sleeve 3 is wound with glass fiber yarns, the tail end of the bolt sleeve 3 close to the blade tip side is sealed by a sealing structure and then connected with the foam strips 4, the foam strips and the wedge strips 2 are sequentially matched and arranged along the arc shape, and the two side end parts of the whole embedding structure are provided with the half wedge strips 1. The cambered surface radius of the wedge-shaped strip 2 or the semi-wedge-shaped strip 1 is designed to be larger than the outer radius of the bolt sleeve 3, and the height of the wedge-shaped strip 2 or the semi-wedge-shaped strip 1 is larger than the outer diameter of the bolt sleeve 3.
In this embodiment, the head refers to a side of the embedded structure far away from the tip of the blade, and the tail refers to a side of the embedded structure near the tip of the blade.
The above embodiments are provided for illustrative purposes only and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should fall within the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (10)
1. A method for embedding blades of a wind driven generator is characterized by comprising the following steps: the bolt sleeve is characterized in that the outer side thread of the bolt sleeve is designed into an arc shape, the bolt foam strip is integrally formed by connecting the foam strips after the tail end is sealed, the bolt foam strip is integrally arranged with the wedge strips of which the two sides are arc-shaped at intervals in sequence, the top end surface of the bolt sleeve protrudes out of the end surface of the blade of the wind driven generator, the end surfaces of the wedge strips are flush with the end surface of the blade of the wind driven generator, one side of each of the two sides of the half-face die joint is an inclined plane, the other side of each of the two sides of the half-face die joint is an arc-.
2. The method for embedding the blades of the wind driven generator as claimed in claim 1, wherein: the arc radiuses of the wedge-shaped strips and the semi-wedge-shaped strips are designed to be larger than the outer diameter of the bolt sleeve, and the wedge-shaped strips or the semi-wedge-shaped strips are arranged in a matched mode after glass fiber yarns are wound on the outer side of the bolt sleeve.
3. The method for embedding the blades of the wind driven generator as claimed in claim 1, wherein: the height of the designed wedge-shaped strip is smaller than the outer diameter of the bolt sleeve, and when the generator blade is molded and paved, the paved glass fiber cloth forms a wave form on the surfaces of the wedge-shaped strip or the semi-wedge-shaped strip and the bolt sleeve along the circumferential direction of the blade.
4. The utility model provides a aerogenerator blade embedded structure which characterized in that: the bolt sleeve and the wedge-shaped strips are arranged at two side ends, the bolt sleeve and the wedge-shaped strips are sequentially matched between the two half wedge-shaped strips, the bolt sleeve and the wedge-shaped strips are arranged along an arc shape, one side of each half wedge-shaped strip is an arc surface, one side opposite to the arc surface is an inclined surface, two opposite sides of each wedge-shaped strip are arc surfaces, the tail end of the part, facing the leaf tip, of the bolt sleeve is sealed and then connected with a foam strip, the arc surfaces of the half wedge-shaped strips are matched with the bolt sleeve in a close; the tooth shape of the outer surface of the bolt sleeve is arc-shaped, and when the bolt sleeve is matched with the wedge-shaped strip or the semi-wedge-shaped strip, the end face of the top of the bolt sleeve protrudes out of the end face of the wind driven generator blade, and the end face of the wedge-shaped strip or the semi-wedge-shaped strip is flush with the end face of the wind driven generator blade.
5. The blade embedded structure of the wind driven generator as claimed in claim 4, wherein: the radius of the semi-wedge-shaped strips and the cambered surfaces of the wedge-shaped strips is larger than the outer radius of the bolt sleeve.
6. The blade embedded structure of the wind driven generator as claimed in claim 4, wherein: the height of the half wedge-shaped strips and the wedge-shaped strips is smaller than the outer diameter of the bolt sleeve.
7. The blade embedded structure of the wind driven generator as claimed in claim 4, wherein: the thickness of the tail part of the semi-wedge-shaped strip is larger than that of the head part.
8. The blade embedded structure of the wind driven generator as claimed in claim 4, wherein: the bolt sleeve is provided with a sealing structure at the tail part of the blade tip side.
9. The blade pre-buried structure of the wind driven generator as claimed in claim 8, wherein: the sealing structure comprises a T-shaped rear cover in interference sealing fit with the T-shaped counter bore of the bolt sleeve.
10. The blade pre-buried structure of the wind driven generator as claimed in claim 8, wherein: the sealing structure further comprises an O-shaped sealing ring arranged between the rear cover and the bolt sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911410241.2A CN110966139B (en) | 2019-12-31 | 2019-12-31 | Method and structure for embedding blades of wind driven generator |
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|---|---|---|---|
| CN201911410241.2A CN110966139B (en) | 2019-12-31 | 2019-12-31 | Method and structure for embedding blades of wind driven generator |
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| CN110966139B CN110966139B (en) | 2021-12-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112659581A (en) * | 2021-01-15 | 2021-04-16 | 洛阳双瑞风电叶片有限公司 | Fixing assembly for embedded blade and manufacturing method of embedded blade |
| CN116557217A (en) * | 2023-07-10 | 2023-08-08 | 东方电气（天津）风电叶片工程有限公司 | Blade root embedded bolt sleeve mounting structure, blade and wind driven generator |
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| CN109296507A (en) * | 2018-10-15 | 2019-02-01 | 株洲时代新材料科技股份有限公司 | A kind of pre-buried connection structure of wind-powered electricity generation composite material blade blade root and wind power plant |
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| WO2012140039A2 (en) * | 2011-04-11 | 2012-10-18 | Lm Wind Power A/S | Wind turbine blade comprising circumferential retaining means in root regions |
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| CN116557217A (en) * | 2023-07-10 | 2023-08-08 | 东方电气（天津）风电叶片工程有限公司 | Blade root embedded bolt sleeve mounting structure, blade and wind driven generator |
| CN116557217B (en) * | 2023-07-10 | 2023-11-10 | 东方电气（天津）风电叶片工程有限公司 | Blade root embedded bolt sleeve mounting structure, blade and wind driven generator |
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| CN110966139B (en) | 2021-12-21 |
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