WO2010070767A1 - 風力発電装置のロータヘッドおよび風力発電装置 - Google Patents
風力発電装置のロータヘッドおよび風力発電装置 Download PDFInfo
- Publication number
- WO2010070767A1 WO2010070767A1 PCT/JP2008/073233 JP2008073233W WO2010070767A1 WO 2010070767 A1 WO2010070767 A1 WO 2010070767A1 JP 2008073233 W JP2008073233 W JP 2008073233W WO 2010070767 A1 WO2010070767 A1 WO 2010070767A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor head
- wind turbine
- wind
- power generator
- wind power
- Prior art date
Links
- 238000005304 joining Methods 0.000 claims description 13
- 238000010248 power generation Methods 0.000 claims description 10
- 239000002184 metal Substances 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- 238000005266 casting Methods 0.000 description 10
- 238000005452 bending Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000011218 segmentation 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
- 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
- F03D1/0691—Rotors characterised by their construction elements of the hub
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0224—Adjusting blade pitch
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2230/00—Manufacture
- F05B2230/20—Manufacture essentially without removing material
- F05B2230/21—Manufacture essentially without removing material by casting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2230/00—Manufacture
- F05B2230/50—Building or constructing in particular ways
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2230/00—Manufacture
- F05B2230/60—Assembly methods
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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
-
- 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
Definitions
- the present invention relates to a rotor head of a wind power generator and a wind power generator.
- a wind turbine device of a wind turbine generator includes a nacelle that is installed to be rotatable substantially horizontally at the upper end of a support, a rotor head that is rotatable around a substantially horizontal axis, and is provided on the nacelle, and radially around the axis of the rotor head. And a plurality of (for example, three) wind turbine blades attached thereto. The force of wind striking the wind turbine blade from the axial direction of the rotor head is converted into power for rotating the rotor head around the axis.
- the rotor head In consideration of strength, the rotor head is generally manufactured as a single unit from a cast (cast iron, cast steel). In recent years, as the wind turbine apparatus is increased in size, the rotor head is also increased in size and weight. For example, the weight of the rotor head of a 2-3 MW class wind turbine generator is about 10 tons. In the future, when the wind turbine generator becomes 5 MW class, the weight of the rotor head is predicted to exceed 40 tons. As described above, when the rotor head is increased in size, it is difficult or impossible to manufacture integrally by casting. In addition, transporting the rotor head to the assembly site requires great work and cost. Therefore, there is a strong demand for a structure that can cope with an increase in size of the rotor head.
- a rotor head has been proposed in which it is divided and manufactured and assembled at an assembly site. This is formed by dividing the rotor head into a central core portion and three outer portions to which the respective wind turbine blades are attached, and joining them.
- a core part and an outer side part can be manufactured with a reliable magnitude
- transportation is also easy.
- the core portion is provided with openings to which the respective outer portions are joined, there is a narrow flange between the openings.
- the molten metal flows through the flange part, so that a cross-sectional area large enough to allow the molten metal to flow is necessary. For this reason, a restriction is imposed on making the core portion small. In other words, it is necessary to secure a sufficient size in order to maintain casting accuracy and quality in the flange region existing in the middle of the molten metal flow path, and it is difficult to easily downsize the core portion. It was.
- an object of the present invention is to provide a rotor head of a wind turbine generator and a wind turbine generator that can cope with an increase in size and can prevent the reliability from being impaired.
- a first aspect of the present invention is a rotor head of a wind turbine generator in which a plurality of wind turbine blades are attached radially about an axis, and is configured by joining divided bodies formed by being divided into a plurality of parts. At least one of the joint portions between the divided bodies is a rotor head of a wind power generator formed in a plane intersecting the axis.
- the rotor head is configured by joining a plurality of divided bodies, the individual divided bodies can be manufactured by casting with a reliable size. Thereby, even if a rotor head enlarges, it can be manufactured reliably. Moreover, since it conveys to a construction site for every division body, it can convey easily. Since at least one of the joining portions of the divided bodies is formed in a plane that intersects the axis of the rotor head, the divided plane is formed in a direction that intersects the wind direction.
- the wind turbine blade When wind hits the wind turbine blade, the wind turbine blade is deflected to the leeward side, so that the bending load acting on the mounting surface of the wind turbine blade increases on the windward side and leeward side, and decreases in the direction intersecting the wind direction. Therefore, since the joint portion between the divided bodies is provided in a portion where the bending load is small, the reliability of the joint structure can be increased. Further, since this joint portion is formed so as to cut between the mounting openings of the wind turbine blade, this portion can be used as an inlet or an outlet of the molten metal when the divided body is manufactured by casting.
- the cross-sectional area that is, the width between the openings can be reduced. If the flange between the openings can be reduced, the rotor head can be reduced in size.
- the number of the divided bodies is two, and the joint portion is formed in a plane passing through the axis center of each wind turbine blade.
- the joining portion is formed only in the plane passing through the axis center of each wind turbine blade, in other words, in the plane intersecting so as to be substantially orthogonal to the axis of the rotor head. Will be.
- a positioning member for setting a mutual bonding position is provided at the bonding portion.
- the joining position can be set by the positioning member, and the casting can be machined accordingly, for example, the mounting surface of the swivel ring can be machined.
- a second aspect of the present invention is a wind power generator provided with a plurality of wind turbine blades that receive wind power, the rotor head of the first aspect, and a power generation facility that generates power by rotation of the rotor head.
- the rotor head of the first aspect it is possible to cope with an increase in the size of the rotor head without impairing reliability, and therefore, it is possible to cope with an increase in the size of the wind turbine generator.
- the rotor head since the rotor head is configured by joining a plurality of divided bodies, the rotor head can be reliably manufactured even if the rotor head is enlarged. Moreover, since it conveys to a construction site for every division body, it can convey easily. Since at least one of the joining portions between the divided bodies is formed in a plane that intersects the axis of the rotor head, the reliability of the joining structure can be increased. Further, since the joint portion is formed so as to cut between the mounting opening portions of the wind turbine blade, the flange portion between the opening portions can be reduced, and the rotor head can be reduced in size.
- FIG. 1 is a side view showing an overall schematic configuration of a wind turbine generator according to an embodiment of the present invention. It is the elements on larger scale explaining the structure of the rotor head of FIG. It is a perspective view which shows the structure of the rotor head concerning one Embodiment of this invention. It is a schematic diagram which shows the load distribution in the turning wheel of the rotor head concerning one Embodiment of this invention. It is a fragmentary sectional view which shows the structure of the junction part concerning one Embodiment of this invention. It is a fragmentary sectional view showing the joined state of the joined part concerning one embodiment of the present invention. It is a schematic diagram explaining the effect
- FIG. 1 is a side view showing an overall schematic configuration of a wind turbine generator 1 according to the present embodiment.
- the wind power generator 1 includes a support column 2 erected on the foundation B, a nacelle 3 installed at the upper end of the support column 2, and a rotor head 4 provided on the nacelle 3 so as to be rotatable about a substantially horizontal axis.
- a head capsule 5 that covers the rotor head 4, a plurality of wind turbine blades 6 that are radially attached around the rotation axis (axis) L of the rotor head 4, and a power generation facility 7 that generates power by the rotation of the rotor head 4. , Is provided.
- the support column 2 has a columnar configuration extending upward from the base B (upward in FIG. 1), for example, a configuration in which a plurality of units are connected in the vertical direction.
- a nacelle 3 is provided at the top of the support 2.
- the nacelle 3 is installed on the unit provided at the top.
- the nacelle 3 rotatably supports the rotor head 4 by the main shaft 8, and houses a power generation facility 7 that generates power by rotating the rotor head 4 (that is, the main shaft 8).
- the power generation equipment 7 includes a speed increasing device that increases the rotational speed of the main shaft 8, a power generator that generates power by transmitting the rotational driving force of the rotor head 4, and a voltage generated by the power generator is converted into a predetermined voltage.
- a transformer is provided.
- FIG. 2 is a partially enlarged view illustrating the configuration of the rotor head portion of FIG.
- FIG. 3 is a perspective view showing a single state of the rotor head 4.
- a plurality of wind turbine blades 6 are attached to the rotor head 4 radially around the rotation axis L, and the periphery thereof is covered with a head capsule 5.
- a force is generated on the wind turbine blade 6 to rotate the rotor head 4 around the rotation axis L, and the rotor head 4 is rotationally driven.
- the description is applied to an example in which three wind turbine blades 6 are provided.
- the number of wind turbine blades 6 is not limited to three, and in the case of two or more than three. It may be applied to the case and is not particularly limited.
- the rotor head 4 is provided with a main shaft mounting portion 9 to which the main shaft 8 is mounted and a wind turbine blade mounting portion 10 that is a substantially circular opening to which the wind turbine blade 6 is mounted.
- the rotor head 4 When viewed from the direction of the rotation axis L, that is, the wind direction W, the rotor head 4 has a substantially equilateral triangular shape with corners being concavely curved.
- the wind turbine blade mounting portions 10 ⁇ / b> A, 10 ⁇ / b> B, and 10 ⁇ / b> C are formed in a substantially circular shape at positions corresponding to the sides of the equilateral triangle.
- the rotor head 4 is composed of a front rotor head (divided body) 13 and a rear rotor head (divided body) 14 that are divided into two at a plane 11 connecting the axis centers OA, OB, OC of the wind turbine blade mounting portions 10A, 10B, 10C. It is configured.
- the surface 11 intersects so as to be substantially orthogonal to the rotation axis L of the rotor head 4.
- a joint portion (joint portion) 16 is provided on the concavely-curved flange portion 15 between the wind turbine blade mounting portions 10A, 10B, 10C in the front rotor head 13 and the rear rotor head 14.
- the joint portion 16 is provided so as to protrude outward and inward in the thickness direction. As shown in FIG. 5, a plurality of, for example, three through holes 17 for inserting bolts are formed in the protrusions of the joint portion 16. A plurality of, for example, two reamer holes (positioning members) 18 for positioning are formed in the main body portion of the joint portion 16.
- the front rotor head 13 and the rear rotor head 14 are positioned by reamer pins (positioning members) 19 inserted into the reamer holes 18 at the respective joints 16, and bolts inserted into the bolt holes 17. 20 and nut 22 are joined. Note that a screw may be cut in the bolt hole 17 and joined by the bolt 20 without using the nut 22.
- the rotor head 4 is configured by joining the front rotor head 13 and the rear rotor head 14, the front rotor head 13 and the rear rotor head 14 are manufactured by casting with a reliable size. Can do. Thereby, even if the rotor head 4 is enlarged, it can be reliably manufactured. Further, since the front rotor head 13 and the rear rotor head 14 can be separately conveyed to the assembly site, they can be easily conveyed.
- a base portion 21 that is rotatably supported by the rotor head 4 by a swivel bearing 23 is provided on the blade root side of the wind turbine blade 6, a base portion 21 that is rotatably supported by the rotor head 4 by a swivel bearing 23 is provided.
- the slewing ring bearing 23 is composed of two rows of rolling bearings.
- the base portion 21 is formed by sandwiching both end portions of the inner ring 25 of the slewing ring bearing 23 between a pair of substantially circular top plates 29.
- the outer ring 27 of the slewing ring bearing 23 is fixed to the rotor head 4 by bolts. Since the wind turbine blade 6 is fixedly attached to the top plate 29 on the outer peripheral side (lower side in FIG. 5), the entire wind turbine blade 6 is rotatably supported with respect to the rotor head 4.
- the rotor head 4 is provided with a pitch drive device 19 that rotates the wind turbine blade 6 around the axis O of the wind turbine blade 6 to change the pitch angle of the wind turbine blade 6 in one-to-one correspondence with each wind turbine blade 6. It has been. (See Figure 2)
- the force of the wind that hits the wind turbine blade 6 from the direction of the rotation axis L of the rotor head 4 is converted into power that rotates the rotor head 4 around the rotation axis.
- the rotation of the rotor head 4 is transmitted to the power generation facility 7 by the main shaft 8, and the power generation facility 7 generates power according to the power supply target, for example, AC power having a frequency of 50 Hz or 60 Hz.
- the rotor head 4 is directed to the wind by appropriately rotating the nacelle 3 on the horizontal plane in order to effectively apply the wind force to the wind turbine blade 6. .
- FIG. 4 shows the load distribution P acting on the swirl wheel 23 in the wind turbine blade mounting portion 10A.
- the surface 11 passes through the axis center OA of the wind turbine blade mounting portion 10A, and is substantially orthogonal to the axis center L, that is, the wind direction W. Points of intersection of the surface 11 and the wind turbine blade mounting portion 10A are points A and B.
- the bending load acting on the turning wheel 23 increases on the windward side and the leeward side, and decreases in the direction intersecting the wind direction. Therefore, the point A and the point B on the surface 11 are minimal. In other words, since the points A and B on the surface 11 are symmetric with respect to each other, these positions are neutral positions of the bending load. Note that when the wind condition or the like changes, the neutral position slightly fluctuates, but generally, the points A and B become the neutral positions.
- the joint portion 16 is provided in a portion where the bending load is the smallest, a large load does not act on the joint portion 16. For this reason, even the structure joined by the bolt 20 and the nut 22 can have long-term sufficient reliability in terms of strength. Note that even if the surface 11 passes through the axis centers OA, OB, OC and intersects the rotation axis L, a substantially equivalent load condition can be obtained. Further, the surface 11 may intersect the rotation axis L without passing through the axis centers OA, OB, OC.
- the front rotor head 13 and the rear rotor head 14 are each made by casting. At this time, the front rotor head 13 and the rear rotor head 14 form a mold so that the joint portion 16 is on the upper side, inject molten metal from the lower portion, and take out excess residue from the joint portion 16.
- the junction part 16 since the junction part 16 is formed in the collar part 15 between windmill blade attachment part 10A, 10B, 10C, the junction part 16 can be made into the exit of a molten metal, for example.
- the cross-sectional area of the flange 15, that is, the width of the flange 15 can be reduced.
- the wind turbine blade mounting portions 10A, 10B, and 10C can be provided close to each other.
- FIG. 7 shows the influence of the size of the flange portion 15 on the size of the wind turbine blade 6.
- the flange portion 15 has a size necessary for smoothly flowing down the molten metal.
- the wind turbine blade mounting portions 10A, 10B, 10C are moved in the direction of the rotation axis L so that the size of the flange 15 is increased.
- the height can be reduced as in the flange portion 15A.
- the flange part 15 can be made small like the flange part 15A, the rotor head 4 can be miniaturized like the rotor head 4A without changing the size of the wind turbine blade 6.
- the flange portion 15 ⁇ / b> B has substantially the same size as the flange portion 15. Get smaller.
- the size of the rotor head 4 can be reduced in the present embodiment.
- the cast joint surface 16 is shaved, and the reamer hole 18 is machined to align it.
- the bolt hole 17 and the mounting surface of the outer ring 27 are machined.
- the front rotor head 13 and the rear rotor head 14 formed separately are respectively transported to the assembly site of the wind power generator 1.
- the front rotor head 13 and the rear rotor head 14 are separately conveyed, they can be easily conveyed to the assembly site even if the rotor head is enlarged.
- the front rotor head 13 and the rear rotor head 14 are assembled at the assembly site.
- a reamer pin 19 is inserted into one of the reamer holes 18 of the joint portion 16 of the front rotor head 13 and the rear rotor head 14.
- the front rotor head 13 and the rear rotor head 14 are combined so that the reamer hole 18 of the other joint 16 is inserted into the reamer pin 19.
- the joined portions 16 are joined together using bolts 20 and nuts 22.
- the outer ring 27 is attached to the outer ring attachment surface and attached to the main shaft 8 of the nacelle 3. Further, the wind turbine blade 6 is attached to the wind turbine blade mounting portions 10A, 10B, and 10C.
- this invention is not limited to said each embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.
- the rotor head 4 is divided into two parts, but this may be divided into three parts or more.
- one of the dividing surfaces is set in a direction intersecting the rotation axis L as in the present embodiment.
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Abstract
Description
ロータヘッドの軸線方向から風車翼に当たった風の力が、ロータヘッドを軸線周りに回転させる動力に変換されるようになっている。
このように、ロータヘッドが大型化すると、鋳物による一体製作が困難となる、あるいは製作できなくなる恐れがある。また、ロータヘッドを組立現場に搬送するのも大変な作業およびコストを要することになる。
このため、ロータヘッドの大型化に対応できる構造が強く求められている。
これは、ロータヘッドが、中央のコア部と各風車翼を取り付ける3個の外側部とに分割され、それらを接合して形成されている。
これにより、コア部および外側部は信頼性のある大きさで鋳物によって製作できるので、高い品質で製造できる。また、小さなものを運搬するので、運送も容易となるものである。
一般に、接合構造の強度は、一体構造のものに比較して弱いので、大きな荷重が作用するものでは長期的な信頼性に問題がある。
本発明の第1態様は、複数の風車翼が軸線回りに放射状に取り付けられている風力発電装置のロータヘッドであって、複数に分割されて形成された分割体を接合して構成され、該分割体同士の接合部分の少なくとも一つは前記軸線に交差する面内に形成されている風力発電装置のロータヘッドである。
分割体同士の接合部分の少なくとも一つは、ロータヘッドの軸線に交差する面内に形成されているので、この分割面は風向に交差する方向に形成されている。風車翼に風が当ると、風車翼は風下側にたわむことになるので、風車翼の取付面に作用する曲げ荷重は風上側および風下側が大きくなり、風向に交差する方向に向かって小さくなる。したがって、分割体同士の接合部分はこの曲げ荷重が小さい部分に設けられていることになるので、接合構造の信頼性を高くすることができる。
また、この接合部分は風車翼の取付用開口部間を切断するように形成されているので、分割体を鋳物で製造する場合に、この部分を溶湯の入口あるいは出口とすることができる。これにより、取付用開口部間の鞍部を溶湯が流れることを求める必要がなくなるので、断面積、すなわち、開口部間の幅を小さくすることができる。開口部間の鞍部を小さくできると、ロータヘッドを小型化することができる。
分割体同士の接合部分の少なくとも一つは、ロータヘッドの軸線に交差する面内に形成されているので、接合構造の信頼性を高くすることができる。
また、この接合部分は風車翼の取付用開口部間を切断するように形成されているので、開口部間の鞍部を小さくでき、ロータヘッドを小型化することができる。
4 ロータヘッド
6 風車翼
7 発電設備
13 前部ロータヘッド
14 後部ロータヘッド
16 接合部
18 リーマ穴
19 リーマピン
L 回転軸線
O,OA,OB,OC 軸線中心
図1は、本実施形態にかかる風力発電装置1の全体概略構成を示す側面図である。
風力発電装置1には、基礎B上に立設された支柱2と、支柱2の上端に設置されたナセル3と、略水平な軸線周りに回転可能にしてナセル3に設けられたロータヘッド4と、ロータヘッド4を覆う頭部カプセル5と、ロータヘッド4の回転軸線(軸線)L周りに放射状に取り付けられる複数枚の風車翼6と、ロータヘッド4の回転により発電を行う発電設備7と、が設けられている。
支柱2の最上部には、ナセル3が設けられている。支柱2が複数のユニットから構成されている場合には、最上部に設けられたユニットの上にナセル3が設置されている。
発電設備7としては、主軸8の回転数を増加させる増速機と、ロータヘッド4の回転駆動力が伝達され発電を行う発電機と、発電機により発電された電圧を所定の電圧に変換するトランスと、が設けられているものを挙げることができる。
ロータヘッド4には、その回転軸線L周りに放射状にして複数枚の風車翼6が取り付けられ、その周囲は頭部カプセル5により覆われている。
これにより、風車翼6にロータヘッド4の回転軸線L方向から風が当たると、風車翼6にロータヘッド4を回転軸線L周りに回転させる力が発生し、ロータヘッド4が回転駆動される。
ロータヘッド4は、回転軸線Lの方向、すなわち、風向Wから見ると、角部が凹湾曲した略正三角形状をしている。風車翼取付部10A,10B,10Cは、図3に示されるように、正三角形の各辺に対応する位置に、略円形状に形成されている。
面11は、ロータヘッド4の回転軸線Lに略直交するように交差している。
前部ロータヘッド13および後部ロータヘッド14における風車翼取付部10A,10B,10Cの間の凹湾曲した鞍部15には、接合部(接合部分)16が設けられている。
接合部16の本体部分には、位置決め用のリーマ穴(位置決め部材)18が複数、たとえば、2個形成されている。
なお、ボルト孔17にネジを切って、ナット22を用いないでボルト20によって接合するようにしてもよい。
これにより、ロータヘッド4が大型化してもそれを確実に製造することができる。また、前部ロータヘッド13および後部ロータヘッド14はそれぞれ別個に組立現場に搬送できるので、それらを容易に搬送することができる。
基部21は、旋回輪軸受23の内輪25の両端部を一対の略円形状の天板29で挟んで形成されている。
外周側(図5の下側)の天板29には風車翼6が固定して取り付けられているので、風車翼6の全体がロータヘッド4に対して回動可能に支持されている。
風力発電装置1においては、ロータヘッド4の回転軸線L方向から風車翼6に当たった風の力が、ロータヘッド4を回転軸線周りに回転させる動力に変換される。
ここで、少なくとも発電を行っている間は、風の力を風車翼6に効果的に作用させるため、適宜ナセル3を水平面上で回転させることにより、ロータヘッド4は風上に向けられている。
図4は、風車翼取付部10Aにおける旋回輪23に作用する荷重分布Pを示している。面11は、風車翼取付部10Aの軸線中心OAを通り、軸線中心L、すなわち、風向Wに略直交している。この面11と風車翼取付部10Aとの交点を点A,Bとする。
なお、面11は、軸線中心OA,OB,OCを通って回転軸線Lに交差するようにしても略同等の荷重条件を得ることができる。また、面11は、軸線中心OA,OB,OCを通らずに、回転軸線Lに交差するようにしてもよい。
前部ロータヘッド13および後部ロータヘッド14はそれぞれ鋳造によって作成される。このとき、前部ロータヘッド13および後部ロータヘッド14は、接合部16が上になるように鋳型を形成し、溶湯を下部から注入し、接合部16から余分なカス等を出すようにする。
言い換えると、風車翼取付部10A,10B,10Cを相互に接近して設けることができる。
本実施形態では、鞍部15の大きさが溶湯を流下するのに必要な断面積と無関係であるので、風車翼取付部10A,10B,10Cを回転軸線Lの方向へ移動させて鞍部15の大きさを鞍部15Aのように小さくすることができる。
このように、鞍部15を鞍部15Aのように小さくできるので、風車翼6の大きさを変えずにロータヘッド4をロータヘッド4Aのように小型化することができる。
言い換えれば、同じ大きさの風車翼6を取り付ける場合、本実施形態では、ロータヘッド4の大きさを小さくすることができる。
このように、前部ロータヘッド13および後部ロータヘッド14を接合するときの位置を決めるリーマ穴18に合わせて鋳物の機械加工、たとえば、旋回輪の取付面の加工を行うので、前部ロータヘッド13および後部ロータヘッド14を合体して、ロータヘッド4を正確に形成することができる。
外輪取付面に、外輪27を取り付けてナセル3の主軸8に装着する。さらに、風車翼取付部10A,10B,10Cに風車翼6を取り付ける。
たとえば、本実施形態では、ロータヘッド4は2分割されているが、これは3分割以上としてもよい。この場合、いずれかの分割面は、本実施形態と同様に回転軸線Lに交差する方向に設定される。
Claims (4)
- 複数の風車翼が軸線回りに放射状に取り付けられている風力発電装置のロータヘッドであって、
複数に分割されて形成された分割体を接合して構成され、該分割体同士の接合部分の少なくとも一つは前記軸線に交差する面内に形成されている風力発電装置のロータヘッド。 - 前記分割体は2個であり、前記接合部分は前記各風車翼の軸線中心を通る面内に形成されている請求項1に記載された風力発電装置のロータヘッド。
- 前記接合部分には、相互の接合位置を設定する位置決め部材が設けられている請求項または2に記載された風力発電装置のロータヘッド。
- 風力を受ける複数の風車翼と、
請求項1から請求項3のいずれか1項に記載されたロータヘッドと、
該ロータヘッドの回転により発電を行う発電設備と、
が設けられている風力発電装置。
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2669911A CA2669911A1 (en) | 2008-12-19 | 2008-12-19 | Rotor head of wind power generator and wind power generator |
KR1020097014307A KR101165500B1 (ko) | 2008-12-19 | 2008-12-19 | 풍력 발전 장치의 로터 헤드 및 풍력 발전 장치 |
US12/520,594 US8480369B2 (en) | 2008-12-19 | 2008-12-19 | Rotor head of wind power generator and wind power generator |
JP2009525812A JP5211054B2 (ja) | 2008-12-19 | 2008-12-19 | 風力発電装置のロータヘッド、その製造方法、およびその搬送組立方法、ならびに風力発電装置 |
CN2008800023260A CN101821499B (zh) | 2008-12-19 | 2008-12-19 | 风力发电装置的旋翼头及风力发电装置 |
EP08860831.0A EP2386755A4 (en) | 2008-12-19 | 2008-12-19 | ROTOR HEAD FOR A WIND ENGINEER AND WIND ENGINEER |
AU2008331350A AU2008331350B2 (en) | 2008-12-19 | 2008-12-19 | Rotor head of wind power generator and wind power generator |
PCT/JP2008/073233 WO2010070767A1 (ja) | 2008-12-19 | 2008-12-19 | 風力発電装置のロータヘッドおよび風力発電装置 |
TW097150259A TW201024535A (en) | 2008-12-19 | 2008-12-23 | Rotor head for wind power generator, and wind power generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2008/073233 WO2010070767A1 (ja) | 2008-12-19 | 2008-12-19 | 風力発電装置のロータヘッドおよび風力発電装置 |
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WO2010070767A1 true WO2010070767A1 (ja) | 2010-06-24 |
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PCT/JP2008/073233 WO2010070767A1 (ja) | 2008-12-19 | 2008-12-19 | 風力発電装置のロータヘッドおよび風力発電装置 |
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US (1) | US8480369B2 (ja) |
EP (1) | EP2386755A4 (ja) |
JP (1) | JP5211054B2 (ja) |
KR (1) | KR101165500B1 (ja) |
CN (1) | CN101821499B (ja) |
CA (1) | CA2669911A1 (ja) |
TW (1) | TW201024535A (ja) |
WO (1) | WO2010070767A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011076795A3 (en) * | 2009-12-21 | 2011-12-29 | Vestas Wind Systems A/S | A hub for a wind turbine and a method for fabricating the hub |
EP2691646B1 (en) | 2011-03-30 | 2017-07-12 | Vestas Wind Systems A/S | A hub for a wind turbine |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2623772A1 (en) * | 2012-02-06 | 2013-08-07 | Alstom Wind, S.L.U. | Wind turbine rotor |
WO2021121495A1 (en) * | 2019-12-20 | 2021-06-24 | Vestas Wind Systems A/S | Improvements relating to the transportation of wind turbine rotor hubs |
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- 2008-12-19 EP EP08860831.0A patent/EP2386755A4/en not_active Withdrawn
- 2008-12-19 CA CA2669911A patent/CA2669911A1/en not_active Abandoned
- 2008-12-19 KR KR1020097014307A patent/KR101165500B1/ko not_active IP Right Cessation
- 2008-12-19 WO PCT/JP2008/073233 patent/WO2010070767A1/ja active Application Filing
- 2008-12-19 CN CN2008800023260A patent/CN101821499B/zh not_active Expired - Fee Related
- 2008-12-19 JP JP2009525812A patent/JP5211054B2/ja active Active
- 2008-12-19 US US12/520,594 patent/US8480369B2/en active Active
- 2008-12-23 TW TW097150259A patent/TW201024535A/zh not_active IP Right Cessation
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JPH0835482A (ja) * | 1994-07-26 | 1996-02-06 | Mitsubishi Heavy Ind Ltd | 風車の可変ピッチ機構 |
JPH0941454A (ja) * | 1995-08-01 | 1997-02-10 | Seiwa Kogyo Kk | 分割式網かご |
JPH11192580A (ja) * | 1998-01-07 | 1999-07-21 | Harness Syst Tech Res Ltd | ロウ付け方法及びロウ付け構造 |
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EP2691646B1 (en) | 2011-03-30 | 2017-07-12 | Vestas Wind Systems A/S | A hub for a wind turbine |
Also Published As
Publication number | Publication date |
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JP5211054B2 (ja) | 2013-06-12 |
JPWO2010070767A1 (ja) | 2012-05-24 |
CN101821499A (zh) | 2010-09-01 |
KR101165500B1 (ko) | 2012-07-13 |
EP2386755A4 (en) | 2013-07-10 |
EP2386755A1 (en) | 2011-11-16 |
CN101821499B (zh) | 2012-10-03 |
TWI351471B (ja) | 2011-11-01 |
CA2669911A1 (en) | 2010-06-19 |
US20100316499A1 (en) | 2010-12-16 |
US8480369B2 (en) | 2013-07-09 |
KR20100101044A (ko) | 2010-09-16 |
TW201024535A (en) | 2010-07-01 |
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