CN219932340U

CN219932340U - 10 MW-level vertical axis wind turbine generator system structure

Info

Publication number: CN219932340U
Application number: CN202321157842.9U
Authority: CN
Inventors: 刘占芳; 何涛; 张凯; 张�浩
Original assignee: Chongqing University; CSIC Haizhuang Windpower Co Ltd
Current assignee: Chongqing University; CSIC Haizhuang Windpower Co Ltd
Priority date: 2023-05-11
Filing date: 2023-05-11
Publication date: 2023-10-31
Anticipated expiration: 2033-05-11

Abstract

The utility model discloses a 10 MW-level vertical axis wind turbine generator system structure, belongs to the technical field of wind turbine generator systems, and solves the technical problem that in the prior art, a fan blade easily touches a rope body when rotating to cause faults or safety accidents. The device comprises a stand column, wherein a pretension assembly, a pretension adjusting assembly, a rotary supporting assembly and a generator set are sequentially arranged on the stand column from top to bottom, the pretension assembly comprises a cone connected to the upper end of the stand column, a connecting block is arranged at the joint of the cone and the stand column, a plurality of radial cross beams are arranged on the connecting block, horizontal cross beams are connected between the plurality of radial cross beams, and the horizontal cross beams are respectively connected with adjacent radial cross beams; the side wall of the upper part of the cone cylinder is provided with a plurality of pre-tightening inhaul cables. According to the 10 MW-level vertical axis wind turbine generator system structure, under the condition that the pretightening force of the four stay cables at the top is adjusted, the horizontal displacement can be effectively controlled, the stress of the top structure is dispersed, the axial vibration of the turbine generator system is reduced, and the running safety and stability of the turbine generator system are improved.

Description

10 MW-level vertical axis wind turbine generator system structure

Technical Field

The utility model relates to the technical field of wind generating sets, in particular to a 10 MW-level vertical axis wind generating set structure.

Background

At present, the structural style of the 10 MW-level vertical axis wind generating set mainly comprises a Darrieus type wind turbine and an H-type wind turbine, the former wind turbine is similar to a lantern in appearance, namely a phi-type wind turbine, the middle part of a blade is connected with a rotating shaft through a plurality of supporting rods, the upper end and the lower end of the blade are inwards bent and folded to be fixed on the outer side of the rotating shaft, the middle part of the whole wind wheel is outwards protruded, compared with the H-type wind turbine structure, the same wind sweeping area Darrieus type structure is larger in radial dimension, the horizontal displacement of an axis at the top position is larger during the running of the wind turbine, although both structures can be fixed by stay cables and a mounting platform, the sag of the stay cables is increased due to the fact that the fixing point is far away from the bottom supporting point, particularly the upper end of the wind turbine blade of the H-type wind turbine is easy to touch the stay cables during rotation to cause accident shutdown, and even the disaster of integral overturning of the wind turbine can be caused during extreme working conditions.

In order to overcome the defects of the two vertical axis wind turbine generator systems in the structural technology, the utility model provides a novel structural type of a 10 MW-level vertical axis wind turbine generator system, which can reduce the displacement of the top of the system to the greatest extent, disperse the stress of the top structure, enhance the integral anti-overturning capability of the structure and improve the safety and stability of the operation of the system.

Disclosure of Invention

The utility model aims to provide a vertical axis wind turbine generator system structure, which solves the technical problem that in the prior art, a fan blade is easy to touch a rope body when rotating so as to cause faults or safety accidents.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a 10 MW-level vertical axis wind turbine generator system structure, which comprises a stand column, wherein a pretension assembly, a pretension adjusting assembly, a rotary supporting assembly and a generator set are sequentially arranged on the stand column from top to bottom, the pretension assembly comprises a cone connected with the upper end of the stand column, a connecting block is arranged at the joint of the cone and the stand column, a plurality of radial cross beams are horizontally arranged on the connecting block, a horizontal cross beam is arranged on one side, far away from the connecting block, of the plurality of radial cross beams, and two end heads of the horizontal cross beam are respectively connected with adjacent radial cross beams; the side wall of the upper side of the conical cylinder is provided with a plurality of pre-tightening guy wires, and one ends of the pre-tightening guy wires, which are far away from the conical cylinder, are respectively connected to the side wall of the radial cross beam, which is far away from the connecting block.

Optionally or preferably, the prestress adjusting component comprises a plurality of rope bodies, one ends of the rope bodies are connected to the pretensioning component, and the other ends of the rope bodies are movably connected to the platform surface; and a damper is arranged on one side of the cable body, which is far away from the pretension assembly.

Optionally or preferably, the rotary support assembly comprises a wind wheel frame, and an upper support bearing, a middle support bearing and a lower support bearing are sequentially arranged between the wind wheel frame and the upright column at equal intervals from top to bottom; the inner rings of the upper support bearing, the middle support bearing and the lower support bearing are respectively and fixedly connected with the upright posts, and the wind wheel frame is respectively and fixedly connected with the outer rings of the upper support bearing, the middle support bearing and the lower support bearing.

Optionally or preferably, a sensor is arranged at one end of the plurality of radial beams, which is far away from the connecting block; the sensor is a vibration sensor, a tension sensor or an angle sensor.

Alternatively or preferably, the taper of the cone is no greater than 1:80.

Optionally or preferably, an included angle between adjacent radial beams is 90 °; the included angle between the horizontal balance beam and the radial cross beam is 45 degrees.

Optionally or preferably, an included angle is formed between the cable body and the platform surface, and the included angle is not greater than 45 degrees.

Alternatively or preferably, the generator set comprises a wind generator, a gearbox and a transmission assembly for transmitting rotor torque to the gearbox; the wind driven generator is coaxially connected with the gear box through an elastic coupling; damping devices are respectively arranged on one sides of the gear box and the wind driven generator, which are close to the installation platform surface.

Based on the technical scheme, the embodiment of the utility model at least has the following technical effects:

(1) According to the 10 MW-level vertical-axis wind turbine generator system structure, the pretension assembly is arranged to form a tower-type pretension top structure, so that the horizontal rigidity of the top structure of the wind turbine generator system is improved;

(2) The pre-stressing adjusting component is arranged, so that the magnitude of the pre-stressing force can be adjusted in real time according to different stress of each rope body in actual work, the minimum difference value of horizontal displacement of four pre-stressing guy rope directions in the pre-stressing component of the unit is ensured, and the vibration of the unit in the axial direction is reduced;

(3) Through the arrangement of the rotary support assemblies, namely three double-volleyball rotary support bearings are arranged at equal intervals in the axial direction, the horizontal pneumatic load of the wind wheel is uniformly transferred from the outer ring of the bearing to the inner ring cone, the horizontal displacement of the top of the wind wheel is reduced to the greatest extent, and the running stability of the unit is improved;

(4) The generator sets are horizontally arranged, so that the gravity center of the generator set equipment is reduced, and the anti-seismic, windproof and anti-overturning capabilities of the generator set are enhanced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a 10 MW-level vertical axis wind turbine generator system;

fig. 2 is a schematic structural view of a pretensioning assembly in a 10MW level vertical axis wind turbine structure according to the present utility model.

In the figure: 1. a column; 2. a cone; 3. a connecting block; 4. a radial beam; 5. a horizontal cross beam; 6. pre-tightening the inhaul cable; 7. a cable body; 8. a damper; 9. a wind wheel frame; 10. an upper support bearing; 11. a middle support bearing; 12. a lower support bearing; 13. a sensor; 14. a wind power generator; 15. a gear box; 16. an elastic coupling; 17. a damping device; 18. a pretension adjuster; 19. and a transmission assembly.

Detailed Description

The drawings in the embodiments of the present utility model will be combined; the technical scheme in the embodiment of the utility model is clearly and completely described; it is apparent that the described embodiments are only some embodiments of the present utility model, not all of them, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present utility model without making any inventive effort are within the scope of the present utility model.

[ example ]

Referring to fig. 1, a 10 MW-level vertical axis wind turbine generator system structure, the diameter of the wind wheel is 120m, the height is 180m, the wind-resistant level is 14, the wind turbine generator system structure comprises a stand column 1, the bottom end of the stand column 1 is fixedly connected with a mounting platform through a flange, a pretension assembly is arranged on the upper portion of the stand column 1, the pretension assembly comprises a cone cylinder 2 connected to the upper end of the stand column 1, a connecting block 3 is arranged at the joint of the cone cylinder 2 and the stand column 1, the connecting block 3 is used for realizing the fixed connection between the stand column 1 and the cone cylinder 2, the cone cylinder 2 is formed by rolling and pressing 20mm steel plates, and the taper of the cone cylinder is not more than 1:80.

In the embodiment, four radial cross beams 4 are horizontally arranged on the connecting block 3, and the included angle between the four radial cross beams 4 is 90 degrees; the four radial beams 4 are far away from one side of the connecting block 3 and are provided with horizontal beams 5, and the two end heads of the water balance beams 5 are respectively fixedly connected with the adjacent radial beams 4, namely, a water balance beam 5 is arranged between every two radial beams 4, wherein an included angle between the end heads of the water balance beams 5 and the radial beams 4 is 45 degrees, and the radial beams 4 and the water balance beams 5 are low-alloy high-strength 16mm wall thickness steel pipes.

The end head of the radial cross beam 4 far away from the connecting block 3 is provided with a sensor 13.

In this embodiment, the sensor 13 is a vibration sensor.

Four pretightening guy wires 6 are arranged on the side wall of the upper portion of the conical cylinder 2, one end of each pretightening guy wire 6 is hinged to the side wall of the conical cylinder 2, and the other end of each pretightening guy wire 6 is hinged to the side wall of one side, far away from the connecting block 3, of each of the four radial cross beams 4. A plurality of lug plates are arranged on the outer side of the radial cross beam 4 and are used for being connected with the prestress adjusting component and transmitting unbalanced load generated during the operation of the top of the unit to the unit mounting product table.

The prestress adjusting component comprises a rope body 7 formed by four high-strength steel ropes with the diameters of 60-90mm, the strength grade of the rope body is 1860MPa, the prestress is not lower than 400MPa when the prestress adjusting component works, one end of the rope body 7 is connected with the pretension component at the top of the unit through the lug plate, and the other end of the rope body is hinged to the mounting platform surface of the unit. Specifically, the rope body 7 forms an included angle with the unit installation platform surface, and the included angle is not more than 45 degrees.

In the embodiment, a damper 8 is arranged on one side of the cable body 7 far away from the pre-tensioning assembly, the damping ratio of the damper 8 is 0.3-0.5%, and the low-frequency vibration source at 5.0Hz can be restrained. The cable body 7 is provided with pretightening force regulator 18 near the one side of pretensioning subassembly, and above-mentioned pretightening force regulator 18 can be according to the actual working atress size real-time adjustment pretightening force size of every cable body 7, ensures that the horizontal displacement difference value in four cable body 7 directions is minimum to vibration in the axial line direction when reducing the unit operation.

The rotary support assembly comprises a wind wheel frame 9, wherein an upper support bearing 10, a middle support bearing 11 and a lower support bearing 12 are sequentially arranged between the wind wheel frame 9 and the upright column 1 at equal intervals from top to bottom; the inner rings of the upper support bearing 10, the middle support bearing 11 and the lower support bearing 12 are respectively and fixedly connected with the upright post 1, and the wind wheel frame 9 is respectively and fixedly connected with the outer rings of the upper support bearing 10, the middle support bearing 11 and the lower support bearing 12.

In the embodiment, the upright column 1 for supporting and connecting the wind wheel is formed by assembling and welding a plurality of sections of conical cylinder sections, the diameter of the rotary supporting component at the bottom of the upright column 1 is not less than 6000mm, the diameter of the middle part is not less than 5000mm, and the diameter of the top is not less than 3000mm. Through three double-row ball type rotary support bearings (namely an upper support bearing 10, a middle support bearing 11 and a lower support bearing 12) which are axially and equidistantly arranged, the horizontal pneumatic load of the wind wheel is uniformly transferred from the bearing outer ring to the inner ring cone, so that the horizontal displacement of the top of the wind wheel is reduced to the greatest extent, and the running stability of a unit is improved.

In this embodiment, the upper support bearing 10 is a thrust aligning bearing, and is used for bearing the axial weight of the wind wheel, and transmitting the axial load of the wind wheel rotating structure to the installation platform surface, so that the overall stress of the unit is uniform and reasonable.

The generator set and the structure are horizontally arranged on the platform, the height from the center of the gear box 15 and the wind driven generator 14 to the mounting surface of the platform is not more than 1800mm, the aspect ratio of the appearance is 1.20-1.80, the gear box 15, the wind driven generator 14 and the mounting surface of the platform are provided with damping devices 17, and in the embodiment, the damping devices 17 are damping pads.

The gear box 15 and the wind driven generator 14 are axially connected through the elastic coupling 16, the maximum axial movement is limited to be not more than 0.50mm, the center of gravity of equipment on a platform is reduced to the greatest extent, and the anti-seismic, wind-resistant and anti-overturning capacity of the unit is enhanced.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a 10MW level vertical axis wind turbine structure, includes stand (1), pretension subassembly, prestressing force adjusting part, gyration supporting part and generating set have been set gradually from top to bottom on stand (1), its characterized in that:

the pretension assembly comprises a cone (2) connected to the upper end of the upright post (1), a connecting block (3) is arranged at the joint of the cone (2) and the upright post (1), a plurality of radial cross beams (4) are horizontally arranged on the connecting block (3), one side, far away from the connecting block (3), of each radial cross beam (4) is connected with a horizontal cross beam (5), and two end heads of each horizontal cross beam (5) are respectively connected with adjacent radial cross beams (4); the side wall of the upper part of the conical cylinder (2) is provided with a plurality of pre-tightening inhaul cables (6), and one ends, far away from the conical cylinder (2), of the pre-tightening inhaul cables (6) are respectively connected to the side wall, far away from the connecting block (3), of the radial cross beam (4).

2. The 10 MW-stage vertical axis wind turbine structure of claim 1, wherein: the prestress adjusting assembly comprises a plurality of rope bodies (7), one ends of the rope bodies (7) are connected to the pretensioning assembly, and the other ends of the rope bodies (7) are movably connected to the mounting platform surface; the cable body (7) is close to one side of pretension subassembly and is provided with pretension force regulator (18), the cable body (7) is close to one side of installation platform surface is provided with attenuator (8).

3. The 10 MW-stage vertical axis wind turbine structure of claim 1, wherein: the rotary support assembly comprises a wind wheel frame (9), wherein an upper support bearing (10), a middle support bearing (11) and a lower support bearing (12) are sequentially arranged between the wind wheel frame (9) and the upright post (1) at equal intervals from top to bottom; the inner rings of the upper support bearing (10), the middle support bearing (11) and the lower support bearing (12) are respectively and fixedly connected with the upright post (1), and the wind wheel frame (9) is respectively and fixedly connected with the outer rings of the upper support bearing (10), the middle support bearing (11) and the lower support bearing (12).

4. The 10 MW-stage vertical axis wind turbine structure of claim 1, wherein: one end head of the radial cross beams (4) far away from the connecting block (3) is provided with a sensor (13); the sensor (13) is a vibration sensor, a tension sensor or an angle sensor.

5. The 10 MW-stage vertical axis wind turbine structure of claim 1, wherein: the taper of the cone (2) is not more than 1:80.

6. The 10 MW-stage vertical axis wind turbine structure of claim 1, wherein: the included angle between the adjacent radial cross beams (4) is 90 degrees; the included angle between the horizontal cross beam (5) and the radial cross beam (4) is 45 degrees.

7. The 10 MW-stage vertical axis wind turbine structure of claim 2, wherein: an included angle is formed between the rope body (7) and the platform surface, and the included angle is not more than 45 degrees.

8. The 10 MW-stage vertical axis wind turbine structure of claim 1, wherein: the generator set comprises a wind driven generator (14), a gear box (15) and a transmission assembly (19), wherein the transmission assembly (19) is used for transmitting wind wheel torque to the gear box (15); the wind driven generator (14) is coaxially connected with the gear box (15) through an elastic coupling (16); damping devices (17) are respectively arranged on one sides of the gear box (15) and the wind driven generator (14) close to the installation platform surface.

9. A 10 MW-stage vertical axis wind turbine structure according to claim 3, characterized in that the upper support bearing (10) is a thrust self-aligning bearing for transferring the axial load of the rotor rotating structure to the mounting platform surface.