CN217462429U - Floating offshore leeward type wind driven generator group - Google Patents

Abstract

The utility model discloses a floating offshore leeward type 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 and is internally provided with a closed cavity; 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 utility model discloses design into floatable structure with rotary platform, inside is equipped with airtight cavity, on the basis of guaranteeing the support performance, makes rotary platform possess the floatability, reduces the crowd total weight and cost to through stabilizing the base with rotary platform restriction in the design position, can satisfy rotary platform's basic rotation demand, still play certain balanced stable ability to supporting platform, reinforcing fan support stability.

Description

Floating offshore leeward type wind driven generator group

Technical Field

The utility model belongs to the aerogenerator field, specifically speaking relates to a showy marine leeward formula aerogenerator 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).

In view of this, the present invention is provided.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in overcoming prior art's not enough, provides a showy marine leeward formula aerogenerator group of floating formula. In order to solve the technical problem, the utility model adopts the following basic concept:

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 stabilizer base bottom circumference evenly distributed, the top of foundation pile is connected with stabilizer base's bottom surface, 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.

Furthermore, the wind power generator also comprises a pre-pulling piece, wherein the pre-pulling piece is positioned on the upwind side of the tower of the leeward type wind power generator, one end of the pre-pulling piece is connected to the tower of the leeward type 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 utility model following beneficial effect has.

1. The utility model discloses design into floatable structure with rotary platform, inside is equipped with airtight cavity, on the basis of guaranteeing the support performance, makes rotary platform possess floatability, reduces the total weight of aircrew and cost to restrict rotary platform at the design position through stabilizing the base, can satisfy rotary platform's basic rotation demand, still play certain balanced stable ability, reinforcing fan support stability to supporting platform.

2. The utility model discloses generator group can arrange in line and arrange, through coupling assembling with prestretch and consolidate, the fan syntropy of generator group arranges, when the wind direction changes, generator group takes rotary platform to turn to because of wind-force, remains first main shaft direction parallel with the wind direction throughout, need not to set up driftage and can realize driftage to wind to the wind system, reduces equipment structural design, and reduce cost and weight do benefit to and build on sea level.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. 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 rotary platform of the present invention;

FIG. 4 is a schematic view of the structure of the stabilizing base of the present invention;

fig. 5 is a schematic layout of the pre-pulling element of the present invention;

fig. 6 is a schematic view of the connection assembly and the pretensioning member of the present invention;

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 the 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 the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not 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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning 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 of the present invention includes a rotary 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 received wind-blowing, if first main shaft direction y had the contained angle with wind direction x, fan blade 7 can receive great torsion, and the fan can take rotary platform 1 to rotate this moment, and rotary platform 1 is compelled to rotate, and stable base 2 is held by the pulling, therefore rotary platform 1 can take place relative rotation with stable base 2, receives the minimum angle of torsion until the fan, and it is the first main shaft direction y of fan and receives torsion minimum when being parallel with wind direction x.

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 the 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.

The utility model discloses rotary platform 1 can turn to passively, blows down in wind, and rotary platform 1 rotation can be taken to the fan to the realization is to wind, turns to rotation angle too big for avoiding driftage, causes the cable winding, can rotate the junction at rotary platform 1 and stable base 2 and set up angle displacement sensor and yaw motor, and it is prior art to utilize angle displacement sensor and yaw motor to realize turning to driftage, and here is just no longer repeated.

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 that the main shaft is tilted upwards by 3-5 degrees to pull the distance between the end part of each blade 7 and the tower 3 is avoided, 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 utility model discloses a stability sets up and draws the piece in advance, prestretches the piece and is located leeward formula aerogenerator's pylon 3's last wind side, and one end is connected on leeward formula aerogenerator's pylon 3, and the other end is connected on 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 with the maximum bending rigidity of the tower 3 on the upwind side 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 use of materials 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 revolving platform 1, a stable base 2, a fixed structure 8, a generator set, a connecting assembly 11, and a pre-tensioning member, wherein the revolving platform 1 is disposed on a sea level, the revolving platform 1 is in a "convex" cylindrical shape, a closed cavity is disposed inside the revolving platform 1, and a top surface of the revolving 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 comprises 7 leeward type wind driven generators arranged on the rotary platform 1, wherein the 7 leeward type wind driven generators are divided into three rows by the number of 2, 3 and 2, and the row direction is vertical to the main shaft direction and the wind direction x of the leeward type wind driven generators, wherein six leeward type wind driven generators at two ends of each row are respectively positioned at the angular points of a regular hexagon, and one leeward type 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.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the preferred embodiment, it is not intended to limit the present invention, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention will still fall within the scope of the present invention.

Claims (10)

1. A floating offshore leeward wind turbine group, comprising:

the device comprises a rotary platform (1), wherein the rotary platform (1) 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 (1) is rotatably sleeved with an installation stable base (2), the rotary platform (1) floats on the sea level, the stable base (2) is positioned above the sea level, the inside of the stable base (2) is in a circular ring shape, and the top end of the stable base is provided with a horizontal inwards extending edge;

a fixed structure (8) connecting the stable 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 rotary platform (1) is actuated by the generator group when being windy, and causes the direction of a first main shaft (y) of a tower (3) of the leeward wind generator to be parallel to the wind direction (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 cluster 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 pieces (11) 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 rotation of the blades is not interfered, and the connecting pieces (11) are beams or steel wire ropes.

9. The floating offshore leeward wind turbine farm 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 stabilizing base (2) is fixed on the sea surface as a floating object, and a circular sliding base used for installing the rotary platform (1) is arranged on the inner wall of the stabilizing base.

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