CN114673635A - Floating offshore leeward wind turbine group - Google Patents
Floating offshore leeward wind turbine group Download PDFInfo
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- CN114673635A CN114673635A CN202210343916.1A CN202210343916A CN114673635A CN 114673635 A CN114673635 A CN 114673635A CN 202210343916 A CN202210343916 A CN 202210343916A CN 114673635 A CN114673635 A CN 114673635A
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- generator
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- 238000007667 floating Methods 0.000 title claims abstract description 28
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims 1
- 238000005452 bending Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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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
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
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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
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- 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
- F05B2240/00—Components
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/93—Mounting on supporting structures or systems on a structure floating on a liquid surface
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- 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
- F05B2240/00—Components
- F05B2240/90—Mounting on supporting structures or systems
- F05B2240/95—Mounting on supporting structures or systems offshore
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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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)
- Power Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a floating offshore leeward wind driven generator group, which comprises a rotary platform, a generator group and a fixed structure, wherein the rotary platform is in a rotary column shape, a closed cavity is arranged in the rotary platform, a stable base is rotatably sleeved on part of the outer wall of the rotary platform, and the stable base is connected with a seabed through the fixed structure; the generator group consists of a plurality of leeward wind driven generators arranged on a rotary platform, and the rotary platform is actuated by the generator group when being windy and leads the first main shaft direction of a tower frame of the leeward wind driven generator to be parallel to the wind direction. The rotary platform is designed into a floatable structure, the closed cavity is arranged in the rotary platform, the rotary platform has floatability on the basis of ensuring the supporting performance, the total weight and the cost of a machine group are reduced, the rotary platform is limited at a designed position through the stabilizing base, the basic rotation requirement of the rotary platform can be met, certain balance and stability capacity is realized on the supporting platform, and the fan supporting stability is enhanced.
Description
Technical Field
The invention belongs to the field of wind driven generators, and particularly relates to a floating offshore leeward type wind driven generator group.
Background
Wind power generation is a green energy technology which develops fastest in the world, people pay attention to some limitations on utilization of land wind energy such as large occupied area and noise pollution while building a land wind farm to develop rapidly, and offshore wind power generation naturally becomes a main direction of current new energy development as the offshore wind power generation is far away from living areas of people and sea levels with large areas, has abundant wind energy resources and is close to power load centers (coastal economic developed areas).
The present invention has been made in view of this situation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a floating offshore leeward type wind turbine group. In order to solve the technical problems, the invention adopts the technical scheme that:
a floating offshore leeward wind turbine farm comprising:
the device comprises a rotary platform, a support and a control system, wherein the rotary platform is in a rotary column shape, a closed cavity is arranged in the rotary platform, a part of the outer wall of the rotary platform is rotatably sleeved with an installation stable base, the rotary platform floats on the sea level, the stable base is positioned above the sea level, the interior of the stable base is in a circular ring shape, and the top end of the stable base is provided with a horizontally and inwardly extending edge;
a fixed structure connecting the stabilization base with the seabed;
the generator group consists of a plurality of leeward wind driven generators which are arranged and installed on the rotary platform in a proper way;
the rotary platform is actuated by the generator group when the rotary platform is windy, and the first main shaft direction of the tower of the leeward wind generator is parallel to the wind direction.
Furthermore, the fixed structure is length-adjustable's rigid foundation pile, is equipped with two at least, along stabilizing the base bottom circumference evenly distributed, the top of foundation pile is connected with the bottom surface of stabilizing the base, and the bottom is connected with the seabed.
Furthermore, the fixed structure is anchor rope or hawser, is equipped with two at least, along stabilizing base bottom circumference evenly distributed, anchor rope or hawser one end is connected with the bottom surface of stabilizing the base, and the other end is connected with the seabed.
Further, the inner wall of the stabilizing base is provided with a plurality of sliding guide pieces which are uniformly distributed along the circumferential direction of the circular ring.
Further, the rotary platform is connected with the stable base in a rotating and sealing mode.
Furthermore, the plurality of leeward wind driven generators are arranged in rows, and the connecting line direction of the same row of horizontal lines is vertical to the direction of the first main shaft of the leeward wind driven generator tower or the positive and negative deviation is not more than 30 degrees.
Further, the leeward wind driven generators are arranged in a row, the row direction is parallel to the first main shaft direction of the leeward wind driven generator tower, or the positive and negative deviation is not more than 30 degrees.
Furthermore, the wind driven generator connecting component comprises connecting pieces used for connecting every two leeward wind driven generators, the connecting components are provided with a plurality of connecting pieces, the connecting pieces can be used for connecting any two adjacent generator sets under the condition that the rotation of the blades is not interfered, and the connecting components are beams or steel wire ropes.
The wind power generator further comprises a pre-pulling piece, wherein the pre-pulling piece is positioned on the upwind side of a tower of the leeward wind power generator, one end of the pre-pulling piece is connected to the tower of the leeward wind power generator, and the other end of the pre-pulling piece is connected to the rotary platform; the pre-tensioning piece comprises at least one steel wire pulling rope, the upper end of each steel wire pulling rope is connected to the tower frame after being pre-tensioned, and the lower ends of the steel wire pulling ropes are arranged on the rotary platform at intervals.
Furthermore, the stable base is used as a floating object and fixed on the sea surface, and a circular sliding base used for installing the rotary platform is arranged on the inner wall of the stable base.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
1. The rotary platform is designed into a floatable structure, the closed cavity is arranged in the rotary platform, the rotary platform has floatability on the basis of ensuring the supporting performance, the total weight and the cost of a machine group are reduced, the rotary platform is limited at a designed position through the stabilizing base, the basic rotation requirement of the rotary platform can be met, certain balance and stability capacity is realized on the supporting platform, and the fan supporting stability is enhanced.
2. The generator groups can be arranged in rows and columns, the generator groups are reinforced through the connecting components and the pretensioning, the fans of the generator groups are arranged in the same direction, when the wind direction changes, the generator groups drive the rotating platform to rotate due to wind power, the direction of the first main shaft is always kept parallel to the wind direction, a yaw wind alignment system is not needed, the structural design of equipment is reduced, the cost and the weight are reduced, and the construction on the sea level is facilitated.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention to its proper form. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the rigid connection of the rotary platform of the present invention;
FIG. 3 is a schematic view of the flexible connection of the rotating platform of the present invention;
FIG. 4 is a schematic view of the structure of the stabilization base of the present invention;
FIG. 5 is a schematic view of a pre-pull arrangement of the present invention;
FIG. 6 is a schematic view of the attachment assembly of the present invention in combination with a pretensioning element;
FIG. 7 is a schematic structural view of a leeward wind power generator of the present invention;
FIG. 8 is a schematic cross-sectional view of a tower of the present invention;
fig. 9 is a schematic view of the overall structure in the second embodiment of the present invention.
In the figure: 1. a rotating platform; 2. a stabilizing base; 3. a tower; 4. a hub; 5. a generator compartment; 6. a flow guide member; 7. a blade; 8. a fixed structure; 9. a slide guide piece; 10. a steel wire rope; 11. a connecting assembly; 12. an anchor cable; x, wind direction; y, a first main shaft.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 9, the floating offshore leeward wind turbine group of the present invention includes a rotating platform 1, a turbine group, and a connecting assembly 11; rotary platform 1 is the rotation column shape, and inside is equipped with airtight cavity, rotating the cover on rotary platform 1's the part outer wall and establishing and install stable base 2, rotary platform 1 floats on the sea level, and stable base 2 is located the sea level top. Referring to fig. 1 and 2, the rotating platform 1 may be formed by welding steel plates or by using other materials, and is designed to form a closed chamber, and has a certain suspension capacity on the sea level and a certain support property to support and mount the wind turbine. Here, the top surface of the rotary platform 1 is preferably designed to be higher than the top surface of the stable base 2, so that the rotary platform 1 is higher, thereby reducing the possibility of seawater immersion, and of course, the top surface of the rotary platform 1 and the stable base 2 can also be designed to be lower than or equal to the top surface of the stable base 2, and the rotary platform 1 and the stable base 2 are made of materials resistant to immersion. Preferably, rotary platform 1 and stable base 2 rotate sealing connection, and the dynamic seal guarantees the leakproofness when can rotate, avoids the sea water to get into internal mechanism and causes the erosion or influence normal work.
The stabilizing base 2 is circular, and the top end of the stabilizing base is provided with a horizontal inwards extending edge, as shown in the attached drawings 2-4, the outer edge of the stabilizing base 2 protrudes out of the rotary platform 1, and the stabilizing base 2 is located on the sea level or at least partially located on the sea level, so that the stabilizing base can play a role in balancing and stabilizing, and the rotary platform is not allowed to turn on one side. The stabilizing base 2 is connected with the seabed through the fixing structure 8, the stabilizing base 2 can be selectively fixed at a required position by the fixing structure 8, and under the pulling force of the fixing structure 8, when the rotary platform 1 is forced to rotate by external force, the fixing structure 8 can pull the stabilizing base 2 to limit the movement of the rotary platform 1, so that the rotary platform 1 can realize relative rotation with the stabilizing base 2. Preferably, the rotation connection between the stabilizing base 2 and the rotating platform 1 is a limiting rotation connection, that is, the stabilizing base 2 is difficult to separate from the rotating platform 1, and the horizontal and vertical movement of the stabilizing base 2 to the rotating platform 1 can be ensured, so that the relative rotation of the rotating platform 1 is ensured without side turning. Further preferably, the stabilizing base 2 can also be designed into a closed cavity structure, or a floating base is selected, so that the buoyancy effect of seawater on the stabilizing base is enhanced, and the floating support performance of the whole structure is improved.
The generator group consists of a plurality of leeward wind driven generators arranged on the rotary platform 1, and the generator group can be properly arranged according to requirements, and certainly, the condition that the fans do not interfere with each other is the premise. Or the wind power generators can be arranged in rows and columns, a plurality of leeward wind power generators are arranged in rows, and the row direction is vertical to the direction of the first main shaft of the tower frame of the leeward wind power generators or the positive and negative deviation is not more than 30 degrees. When the leeward wind driven generators are arranged in a row, and the row direction is parallel to the first main shaft direction of the leeward wind driven generator tower or the positive and negative deviation is not more than 30 degrees. The rotary platform 1 is actuated by the generator group receiving wind, and causes the first main shaft direction y of the tower 3 of the leeward wind power generator to be parallel to the wind direction x. It can be understood that, when the generator group is blown by wind, if the first main shaft direction y has an included angle with the wind direction x, the fan blade 7 can receive a large torsion, at this moment, the fan can drive the rotary platform 1 to rotate, the rotary platform 1 is forced to rotate, and the stable base 2 is pulled, so that the rotary platform 1 and the stable base 2 can rotate relatively until the fan receives the angle with the minimum torsion, and just the torsion received when the first main shaft direction y of the fan is parallel to the wind direction x is the minimum torsion.
Fixed knot constructs 8 can adopt length adjustable rigidity foundation pile, like pole, pipe etc. the foundation pile is equipped with two at least, and along 2 bottom circumference evenly distributed of stable base, the top of foundation pile is connected with stable base 2's bottom surface, and the bottom is connected with the seabed, and length adjustable is in order to realize controlling the volume size that rotary platform 1 immerges in the sea, and then adjustment rotary platform 1 buoyancy size. The fixed structure 8 can also adopt anchor cables 12 or cables, at least two anchor cables 12 or cables are arranged and are evenly distributed along the circumferential direction of the bottom of the stabilizing base 2, one end of each anchor cable 12 or cable is connected with the bottom surface of the stabilizing base 2, the other end of each anchor cable 12 or cable is connected with the seabed, the end of each anchor cable 12 or cable connected with the stabilizing base 2 can be connected through a tensioning device, the tensioning device can adjust the tensioning and releasing of the anchor cables 12 or cables, the height of the stabilizing base 2 is adjusted by tensioning or loosening the anchor cables 12 or cables, the buoyancy of the rotary platform 1 is further adjusted, when the position needs to be moved, the connection between the anchor cables 12 or cables and the seabed is disconnected, and a ship is used for pulling the device to a proper position so as to meet the selection or adjustment of the position of the generator group.
The inner wall of stabilizing base 2 is equipped with a plurality of sliding guide piece 9, sliding guide piece 9 is along stabilizing base 2's vertical section inner wall and horizontal segment inner wall evenly distributed, see fig. 4 and show, sliding guide piece 9 chooses for use the smoothness good (frictional force is little), wear-resisting material makes, if can select wear-resisting potsherd, for convenient production, installation and change, sliding guide piece 9 can make the monolithic type, then embedding fixed mounting is at stabilizing base's medial surface, stabilizing base 2 rotates with rotary platform 1's outer wall through sliding guide piece 9 and is connected, rotary platform 1 and sliding guide piece 9 contact and relative slip, realize rotary motion. The setting of sliding guide piece 9 can reduce the contact surface and the frictional force between rotary platform 1 and stable base 2, does benefit to the two relative rotation, can avoid the two direct contact to cause the fast problem of wearing and tearing simultaneously, and sliding guide piece 9 here adopts the demountable installation mode, convenient change.
According to the invention, the rotary platform 1 can be passively steered, a fan can drive the rotary platform 1 to rotate under the blowing of wind so as to realize wind alignment, in order to avoid cable winding caused by overlarge yaw steering rotation angle, an angle displacement sensor and a yaw motor can be arranged at the rotating connection position of the rotary platform 1 and the stable base 2, and the steering yaw is realized by utilizing the angle displacement sensor and the yaw motor, which is the prior art, and is not repeated here.
The distribution of the leeward wind driven generators can be set according to requirements, for example, the design is reasonable according to the wind energy density on the sea and the generated power of the leeward wind driven generators, so that the maximum generated energy and the minimum wake flow influence are realized; the power transmission and transformation scheme and the condition of convenient installation are fully considered; the arrangement distance is not too large so as to save the area of the rotary platform 1. Preferably, the generator group at least comprises two rows of leeward wind driven generators, the leeward wind driven generators in two adjacent rows are arranged in a staggered manner, so that the bearing force of the rotary platform 1 in all directions is ensured to be more uniform, the overall balance of the device can be improved, and the rows of the leeward wind driven generators are perpendicular to the y direction and the x direction of the first main shaft of the tower 3 of the leeward wind driven generator. In order not to influence the independent operation of the fan, the distance between two adjacent rows can be set to be not less than the height of a tower 3 of the leeward wind driven generator, the distance between two adjacent leeward wind driven generators in the same row can be set to be not less than 2N, N is the turning radius of a blade 7 of the leeward wind driven generator, so that the leeward wind driven generators can not interfere with each other when working, and the power generation efficiency of a generator group is improved. Preferably, when the generator group comprises seven leeward wind driven generators, the generator group can be arranged in three rows in a 2-3-2 mode, wherein six leeward wind driven generators at two ends of each row are respectively positioned at angular points of a regular hexagon, and one leeward wind driven generator is positioned at the centroid of the regular hexagon, as shown in the attached drawing 1, the distribution can ensure that the bearing force at each position of the rotary platform 1 is uniform, and the balance of the device is ensured.
In order to deal with the shaking caused by sea waves and sea wind and avoid overlarge swinging of the head of each fan, the wind power generator further comprises connecting components 11 for connecting the leeward wind power generators in pairs, namely, any two of the wind power generators are connected under the condition that interference of rotation of the blades is not generated. The connecting assembly 11 is provided with a plurality of connecting assemblies, and the connecting assembly 11 can select a linear steel frame beam with better stability or a pre-tensioned steel wire rope with lighter weight. Preferably, when the fan sets are arranged in rows, the connecting assemblies 11 connect adjacent leeward wind driven generators in the same row, the connecting assemblies 11 are horizontally arranged and perpendicular to the wind direction x, and two ends of the connecting assemblies 11 are respectively connected to the top ends of the towers 3 of the adjacent leeward wind driven generators, as shown in fig. 6, so that the adjacent wind driven generators can be connected without influencing the rotation of the blades 7, and the stability of the generator group is enhanced.
The lower end of a tower 3 of the leeward type wind driven generator is connected to the rotary platform 1, the upper end of the tower 3 is provided with a generator room 5, a plurality of blades 7 are rotatably connected to the generator room 5 through a hub 4, and the plurality of blades 7 are positioned on the leeward side of the tower 3. Preferably, the blades 7 rotate around the main shaft, the main shaft is parallel to the wind direction x, and the blades 7 are located on the leeward side of the tower 3, so that the method of tilting the main shaft upwards by 3-5 degrees is avoided for pulling the distance between the end part of each blade 7 and the tower 3, the swept area of the blades 7 is ensured on the premise of realizing safety, and wind energy loss is avoided. Hub 4 and blade 7 on generator cabin 5 pass through pylon 3 and connect on rotary platform 1, rotary platform 1 rotates with stable base 2 and is connected, when the air current direction is wind direction x changes promptly, blade 7 can swing along with the air current, make the air current pass through blade 7 and drive pylon 3 and rotary platform 1 and rotate on stable base 2, main shaft direction that keeps leeward formula aerogenerator all the time is parallel with wind direction x, thereby need not to install driftage to wind device and system, the cost is reduced, cabin weight has been reduced, dynamic stiffness has been improved, make the structure of pylon 3 more stable.
In order to further improve the stability of the invention, a pretensioning element is arranged, the pretensioning element is positioned at the upwind side of the tower 3 of the leeward wind driven generator, one end of the pretensioning element is connected to the tower 3 of the leeward wind driven generator, and the other end of the pretensioning element is connected to the rotary platform 1. It can be understood that, two ends of the steel wire pull rope 10 are respectively connected to the tower 3 and the rotary platform 1, and a certain pretension force is applied to the steel wire pull rope 10, so that the initial stress state of the cross section of the tower 3 can be improved, and the tension generated by the steel wire pull rope 10 can counteract the bending moment of partial wind power on the tower 3, reduce the load of the tower 3, reduce the weight of the tower 3, and improve the stability of the tower 3, thereby improving the overall rigidity and strength of the wind driven generator. Preferably, the wire rope 10 is disposed on the windward side of the tower 3, and by disposing the wire rope 10 on the windward side of the tower 3, the bending moment of part of the wind force on the windward side of the tower 3 can be offset, and the load of the tower 3 can be reduced. Here, each tower 3 may be provided with more than two steel wire pull ropes 10, each steel wire pull rope 10 is pre-tensioned, and then the upper end of each steel wire pull rope is connected to the tower 3, and the lower ends of each steel wire pull rope 10 are arranged on the rotary platform 1 at intervals. When using many steel wire stay ropes 10, the upper end all connects on pylon 3 after every steel wire stay rope pretension, and the lower extreme interval sets up on rotary platform 1, forms many pulling forces at the windward side of pylon 3, strengthens pylon 3's stability.
Because the air current can form the torrent behind pylon 3, in order to prevent or reduce the formation of the torrent behind pylon 3, improve fan efficiency, be equipped with guiding element 6 at the leeward side of pylon 3, preferably, guiding element 6 is in the direction horizontal sectional area of the side of leeward side of being close to and is reduced gradually, guiding element 6 not only can reduce the influence of torrent to pylon 3 leeward side blade 7, can also increase the wind-force that blade 7 received, make blade 7 better swing along with the air current, make blade 7 under the effect of wind force, drive generator cabin 5, pylon 3 and rotary platform 1 and rotate in stabilizing base 2, realize automatic wind deflection. It is further preferred that the deflector 6 is integral with the tower 3, i.e. the cross-section of the tower 3 is shaped to provide a deflector function, the cross-section of the tower 3 is non-circular, the cross-section of the tower 3 has a maximum dimension only in the direction of the first principal axis y, i.e. in the direction of maximum bending stiffness, and the cross-sectional area of the tower 3 decreases gradually in the direction towards the leeward side. It can be understood that the end face of the tower 3 on the upwind side of the tower 3 with the maximum bending rigidity is ensured to be parallel to the direction of the maximum bending moment applied to the blade 7, so that the size of the cross section of the tower 3 in other directions can be reduced, the material usage is reduced, and the weight of the tower 3 is reduced.
Example one
As shown in fig. 1 to 8, the floating offshore leeward wind turbine generator set according to the present embodiment includes a rotating platform 1, a stabilizing base 2, a fixing structure 8, a generator set, a connecting assembly 11, and a pre-tensioning member, wherein the rotating platform 1 is disposed on a sea level, the rotating platform 1 is in a shape of a "convex" cylinder, a closed cavity is disposed inside the rotating platform 1, and a top surface of the rotating platform 1 is higher than the sea level. The stabilizing base 2 is circular, the top end of the stabilizing base 2 is provided with an inwardly extending edge, as shown in fig. 2-4, and the stabilizing base 2 is rotatably sleeved on the outer wall of the rotary platform 1 and is located above the sea level. Stabilize vertical section inner wall and the horizontal segment inner wall of base 2 and evenly be equipped with a plurality of sliding guide piece 9, stabilize base 2 and rotate with rotary platform 1 through sliding guide piece 9 and be connected, wear-resisting potsherd is chooseed for use to sliding guide piece 9, and rotary platform 1's top surface is a little higher than the top surface of stabilizing base 2.
Fixed knot constructs 8 and is two length-adjustable's foundation piles, and the vertical setting of foundation pile just follows stable base 2 evenly distributed, and the top of foundation pile is connected with stable base 2's bottom surface, and the bottom is connected with the seabed. The generator group is composed of 7 leeward wind driven generators installed on a rotary platform 1, the 7 leeward wind driven generators are divided into three rows by the number of 2, 3 and 2, and the row direction is perpendicular to the main shaft direction and the wind direction x of the leeward wind driven generators, wherein six leeward wind driven generators at two ends of each row are respectively positioned at the angular points of a regular hexagon, and one leeward wind driven generator is positioned at the centroid of the regular hexagon, which is shown in the attached drawings 1, 5 and 6.
The lower end of a tower 3 of the leeward type wind driven generator is connected with the rotary platform 1, the upper end of the tower 3 is provided with a generator room 5, a plurality of blades 7 are rotatably connected to the generator room 5 through a hub 4, and the plurality of blades 7 are positioned on the leeward side of the tower 3. The section of the tower 3 is in a shape with a flow guiding function, the cross section of the tower 3 is in a non-circular shape, the section of the tower 3 has the largest size only in the y direction of the first main shaft, namely the direction of the maximum bending rigidity, and the cross section of the tower 3 is gradually reduced in the direction close to the leeward side, which is shown in fig. 8. Coupling assembling 11 horizontal setting just is perpendicular with wind direction x, and coupling assembling 11 is a style of calligraphy steel frame roof beam, and coupling assembling 11 is equipped with a plurality ofly, and coupling assembling 11's both ends are connected respectively in controlling adjacent 3 top portions of pylon of leeward formula aerogenerator, refer to fig. 6 and show. Every leeward formula aerogenerator all is equipped with two steel wire stay ropes 10, and two steel wire stay ropes 10 are all connected on pylon 3 after taking up in advance, and the lower extreme interval sets up on rotary platform 1.
Example two
As shown in fig. 9, the present embodiment is different from the first embodiment in that: will stabilize 2 replacements of base for floating base, floating base is formed by the steel sheet welding, and inside adoption frame construction consolidates, and floating base is inside to be equipped with airtight cavity, and floating base rotates the cover and establishes to be installed on rotary platform 1's outer wall, and floating base has the showy function this moment, and rotary platform 1 can choose for use not to have the platform of showy function, and overall structure's support is provided by floating base.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A floating offshore leeward wind turbine group, comprising:
the rotary platform (1) is in a rotary column shape, a closed cavity is formed in the rotary platform, a stable base (2) is rotatably sleeved on part of the outer wall of the rotary platform (1), the rotary platform (1) floats on the sea level, the stable base (2) is located above the sea level, the stable base (2) is in a circular ring shape, and the top end of the stable base is provided with an edge extending horizontally inwards;
a fixed structure 8 connecting the stabilizer base 2 with the seabed;
the generator group consists of a plurality of leeward wind driven generators which are arranged and installed on the rotary platform (1) in a proper way;
the rotating platform (1) is actuated by the generator group being exposed to the wind and causes the direction of the first main axis (y) of the tower (3) of the leeward wind generator to be parallel to the direction of the wind (x).
2. The floating offshore leeward wind turbine farm of claim 1, wherein: the fixed structure (8) is a rigid foundation pile with adjustable length, at least two rigid foundation piles are arranged, the rigid foundation piles are evenly distributed along the circumferential direction of the bottom of the stabilizing base (2), the top end of each foundation pile is connected with the bottom surface of the stabilizing base (2), and the bottom end of each foundation pile is connected with the seabed.
3. The floating offshore leeward wind turbine farm of claim 1, wherein: the fixing structures (8) are at least two anchor cables or mooring ropes which are uniformly distributed along the circumferential direction of the bottom of the stabilizing base (2), one ends of the anchor cables or mooring ropes are connected with the bottom surface of the stabilizing base (2), and the other ends of the anchor cables or mooring ropes are connected with the seabed.
4. The floating offshore leeward wind turbine farm of claim 1, wherein: the inner wall of the stabilizing base (2) is provided with a plurality of sliding guide pieces (9) which are uniformly distributed along the circumferential direction of the circular ring.
5. The floating offshore leeward wind turbine farm of claim 1, wherein: the rotary platform (1) is connected with the stable base (2) in a rotating and sealing mode.
6. The floating offshore leeward wind turbine farm of claim 1, wherein: the leeward wind driven generators are arranged in rows, and the connecting line direction of the same row of horizontal lines is vertical to the direction of the first main shaft of the leeward wind driven generator tower or the positive and negative deviation is not more than 30 degrees.
7. The floating offshore leeward wind turbine farm of claim 1, wherein: the leeward wind driven generators are arranged in a row, the row direction of the leeward wind driven generators is parallel to the direction of a first main shaft of a tower frame of the leeward wind driven generator, or the positive and negative deviation is not more than 30 degrees.
8. The floating offshore leeward wind turbine farm of claim 1, wherein: the wind driven generator is characterized by further comprising connecting pieces 11 used for connecting every two leeward wind driven generators with each other, the connecting assemblies 11 are provided with a plurality of connecting pieces and can be used for connecting any two adjacent generator sets under the condition that rotation of the blades is not interfered, and the connecting assemblies 11 are beams or steel wire ropes.
9. The floating offshore leeward wind turbine cluster of claim 1, wherein: the wind power generator also comprises a pre-pulling piece, wherein the pre-pulling piece is positioned on the upwind side of a tower (3) of the leeward type wind power generator, one end of the pre-pulling piece is connected to the tower (3) of the leeward type wind power generator, and the other end of the pre-pulling piece is connected to the rotary platform (1); the pre-tensioning piece comprises at least one steel wire pulling rope (10), the upper end of each steel wire pulling rope is connected to the tower frame (3) after being pre-tensioned, and the lower ends of the steel wire pulling ropes are arranged on the rotary platform (1) at intervals.
10. The floating offshore leeward wind turbine farm of claim 1, wherein: the stable base (2) is used as a floating object and fixed on the sea surface, and a circular sliding base used for installing the rotary platform (1) is arranged on the inner wall of the stable base.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210343916.1A CN114673635A (en) | 2022-03-31 | 2022-03-31 | Floating offshore leeward wind turbine group |
| EP22183062.3A EP4116580A1 (en) | 2021-07-05 | 2022-07-05 | Wind generator and wind generator group |
| US17/857,188 US20230003190A1 (en) | 2021-07-05 | 2022-07-05 | Wind generator and wind generator group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210343916.1A CN114673635A (en) | 2022-03-31 | 2022-03-31 | Floating offshore leeward wind turbine group |
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| CN114673635A true CN114673635A (en) | 2022-06-28 |
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| CN202210343916.1A Pending CN114673635A (en) | 2021-07-05 | 2022-03-31 | Floating offshore leeward wind turbine group |
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