CN210440157U

CN210440157U - Wind power flexible tower frame with elastic connection

Info

Publication number: CN210440157U
Application number: CN201921090319.2U
Authority: CN
Inventors: 胡育青; 何成婕; 胡鹏; 杨顺; 臧卫
Original assignee: Shanghai Taisheng Wind Power Equipment Co ltd
Current assignee: Shanghai Taisheng Wind Power Equipment Co ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-05-01
Anticipated expiration: 2029-07-12

Abstract

The utility model discloses an elastic connection wind power flexible tower, which comprises a plurality of interconnected tower shell sections, wherein the interconnected tower shell sections are fixedly connected to the upper end of a tower cylinder transition section, and the lower end of the tower cylinder transition section is fixedly connected with a base flange; a belleville spring is embedded between the tower barrel connecting flanges of the two adjacent tower barrel sections, and a flange bolt penetrates through the belleville spring to connect the tower barrel connecting flanges of the two adjacent tower barrel sections with each other; the base flange comprises a flange cylinder ring, an upper flange plate and a lower flange plate are welded on the flange cylinder ring, the upper flange plate and the lower flange plate respectively extend towards the inner side and the outer side of the cylinder wall along the radial direction of the flange cylinder ring, a plurality of anchoring bolts are respectively arranged on the upper flange plate and the lower flange plate on the inner side and the outer side of the cylinder wall of the flange cylinder ring in a penetrating manner, supporting rib plates are arranged on two sides of each anchoring bolt, and the upper end and the lower end of each supporting rib plate are respectively welded on the upper flange plate and the lower flange plate. The structure effectively increases the vibration damping of the tower, and the connection strength of the root of the tower is high.

Description

Wind power flexible tower frame with elastic connection

Technical Field

The utility model relates to a wind power generation technical field especially relates to a large-scale wind power generation pylon of mutual elastic connection of pylon tower section of thick bamboo festival.

Background

The wind generating set is usually provided with a heavy structure such as a cabin and a fan blade on a tower with the height of tens of meters or hundreds of meters, and has the characteristics of high gravity center, low tower rigidity and low resonance frequency. With the development of wind power generation towards offshore and high-capacity wind turbines, the height of the tower becomes higher and higher, the increase of the height of the tower causes the rigidity to be reduced, the frequency of a system is reduced, and the vibration problem of the tower is more obvious.

When the wind turbine generator set runs, the cabin and the tower can generate more serious vibration, and the tower can vibrate more and more seriously along with the continuous increase of the wind speed; long-term vibration can cause a plurality of adverse effects on the operation of the wind generating set, such as reduction of matching precision and increase of abrasion of transmission parts, and more seriously, under the inducement of long-term vibration, cracks can be easily generated at the welding joint position of the tower due to stress concentration, and fastening bolts between structural members such as a cylinder flange and the like can also loosen under the action of repeated vibration; moreover, the vibration can seriously affect the stability and reliability of the operation of the generator set, and even cause the collapse of the generator set and the tower.

In order to avoid destructive vibration of the tower of the wind generating set, the most common means is to increase the vibration damping of the tower so as to quickly attenuate the vibration of the tower and the set, thereby reducing the amplitude of the system vibration. At present, the means for reducing the vibration of the generator set and the tower is mainly to adopt a damping structure at the joint of a generator set cabin and the top of the tower to absorb the energy generated by the mutual movement of the generator set cabin and the tower, but the structure can not improve the vibration damping of the tower or a tower drum, so that the load of the tower can be increased, and the structure is complex and inconvenient to install and maintain.

Patent application No. 201711096645.X, the structure has a mass body in suspension at the wind power tower, and this mass body passes through a plurality of elastic support piece and connects in the section of thick bamboo wall inboard of tower section of thick bamboo, and when the swing appears in the tower section of thick bamboo, the mass body can produce opposite swing, and this opposite swing just is different with the swing of tower section of thick bamboo to make the vibration of tower section of thick bamboo itself weaken or reduce. Obviously, in the tuned mass damper formed by suspending the mass body, the effect is better when the mass body is heavier, but the weight of the mass body is increased, so that the load of the tower is inevitably increased greatly, huge load is formed on the tower, the stability, reliability and service life of the tower and a unit are reduced, the self weight of the tower is enhanced, and serious problems are brought to the manufacturing, transportation, installation and cost of the tower.

In the operation process of the wind power tower, the root of the wind power tower is the most severely stressed part, the tearing and the collapse of the wind power tower are usually generated at the root of the tower, and the alternating stress caused by the vibration of the tower is reflected at the root of the tower in a concentrated manner. The tower with the existing structure mostly neglects the reinforced design or the unreasonable design of the root of the tower. Therefore, the existing tower structure can not effectively enhance the vibration damping of the tower, and the tower root of the existing tower structure does not have reasonable rigidity and enough connection strength.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a flexible pylon of wind-powered electricity generation of elastic connection is provided, the vibration damping that can not only effectively increase the pylon reduces the pylon vibration, and the pylon root has higher joint strength moreover.

In order to solve the technical problem, the wind power flexible tower with elastic connection of the utility model comprises a plurality of tower shell sections which are connected with each other, wherein the tower shell sections which are connected with each other are fixedly connected with the upper end of a tower tube transition section, and the lower end of the tower tube transition section is fixedly connected with a base flange; a belleville spring is embedded between the tower barrel connecting flanges of the two adjacent tower barrel sections, and a flange bolt penetrates through the belleville spring to connect the tower barrel connecting flanges of the two adjacent tower barrel sections with each other; the base flange comprises a flange cylinder ring, an upper flange plate and a lower flange plate are welded on the flange cylinder ring, the upper flange plate and the lower flange plate respectively extend towards the inner side and the outer side of the cylinder wall along the radial direction of the flange cylinder ring, a plurality of anchoring bolts are respectively arranged on the upper flange plate and the lower flange plate on the inner side and the outer side of the cylinder wall of the flange cylinder ring in a penetrating manner, supporting rib plates are arranged on two sides of each anchoring bolt, and the upper end and the lower end of each supporting rib plate are respectively welded on the upper flange plate and the lower flange plate.

In the structure, because the belleville springs are embedded between the connecting flanges of the two adjacent tower shell rings, the flange bolt penetrates through each belleville spring to connect the tower shell connecting flanges of the two adjacent tower shell rings, and the structure ensures that the tower shell connecting flanges of the two adjacent tower shell rings are uniformly distributed with the plurality of belleville springs. When the tower is subjected to bending oscillation in a certain direction by an external acting force to generate swing, the tower cylinder wall on the tension side is subjected to the pretensioning force of the flange bolts to prevent the flanges of the two tower cylinder sections from being separated to generate reverse swing damping, and the tower cylinder connecting flange on the compression side tower cylinder wall is subjected to the action of reverse spring force from the belleville spring to generate reverse damping force to prevent and delay the swing oscillation of the tower cylinder, so that the vibration and the amplitude of the tower are effectively reduced. Therefore, under the condition that the overall mass of the tower barrel is not increased, vibration damping is effectively generated through the elastic damping effect of the belleville springs, the load of the tower barrel is favorably reduced, the lightweight design of the tower barrel is conveniently realized, the weight of the whole tower barrel is reduced, and the cost of the tower barrel is saved. And each flange bolt corresponds to one belleville spring, and the belleville springs are uniformly distributed on the periphery of the tower cylinder connecting flange, so that the tower system damping of the tower in all directions such as the left-right direction or the front-back direction of a tower shell ring is improved, the tower cylinder vibration is reduced in the whole periphery of the tower section, the system reliability of the wind power generation equipment is improved, and the service life of the wind power generation equipment is prolonged. The tower frame shell sections connected with each other are connected with the base flange through the tower tube transition section, so that the structure is convenient to manufacture and install, and the standardization and the normalization of the tower frame shell section production are facilitated; the connecting method has high strength, can effectively enhance the stability of the tower and improve the vibration damping of the tower base. And moreover, an upper flange and a lower flange are welded on the flange cylinder ring of the base flange, the flanges extend towards the inner side and the outer side of the cylinder wall of the flange cylinder ring, and a plurality of supporting rib plates are further welded between the upper flange and the lower flange, so that the base flange with a three-dimensional structure is formed, the overall strength and rigidity of the flange are extremely high, and huge tower anchoring force can be provided. The length of the welding seam between the upper flange plate, the lower flange plate, the support rib plate and the flange cylinder ring is prolonged, the welding firmness is increased, after a plurality of anchor bolts are arranged on the upper flange plate and the lower flange plate in a penetrating mode along the circumferential direction, a very reliable anchoring acting force can be provided for the tower, the anchoring effect of the tower and the foundation is effectively enhanced, and the occurrence of tower overturning accidents is avoided.

In a further embodiment of the present invention, a tower tube connecting flange is welded to the upper end of the tower tube transition section; the lower end of the cylinder body of the tower cylinder transition section is welded at the upper end of the flange cylinder ring of the base flange. The structure facilitates the reliable connection of the tower barrel section and the base flange through the tower barrel transition section.

The utility model discloses a further embodiment, the welding of pylon shell ring top that is located the pylon upper end has the top of the tower flange, and the equipartition has a plurality of top of the tower flange screws on this top of the tower flange. The generator set cabin body is convenient to install on the top of the tower.

The utility model discloses a preferred embodiment, the tower section of thick bamboo flange of two adjacent tower shell ring has a plurality of flange bolts along the circumference equipartition, and each flange bolt corresponds a disc spring, and this disc spring inlays the dress in tower section of thick bamboo flange's pit. Effective vibration damping can be formed in multiple directions, and the butterfly spring is firmly installed.

The utility model discloses a preferred embodiment, anchor bolt's lower extreme is buried underground on the pylon basis, and anchor bolt's upper end is worn to adorn on last ring flange and lower ring flange. A firm anchoring effect can be formed for the tower.

The utility model discloses a preferred embodiment, the tower section of thick bamboo flange of pylon shell ring is L type flange dish. The tower frame shell ring and the tower drum transition section are both of circular truncated cone-shaped tubular structures, and the tower frame shell ring and the tower drum transition section which are connected with each other are located on the same circular table surface. High connection strength and good integral rigidity.

Drawings

The wind power flexible tower with elastic connection according to the present invention will be further described with reference to the accompanying drawings and the following detailed description.

FIG. 1 is a schematic view of the overall structure of an elastically connected wind power flexible tower of the present invention;

FIG. 2 is an enlarged schematic view of section I of the structure of FIG. 1;

FIG. 3 is an enlarged schematic view of section II of the structure of FIG. 1;

FIG. 4 is a schematic view showing a connection structure of a tower transition joint and a base flange in the structure of FIG. 1

FIG. 5 is an enlarged schematic view of section III of the structure of FIG. 4;

in the figure, 1-tower foundation, 2-base flange, 3-tower transition section, 4-tower door, 5-tower shell section, 6-tower top flange, 7-tower top flange screw hole, 8-tower connecting flange, 9-belleville spring, 10-flange bolt, 21-flange shell ring, 22-upper flange plate, 23-supporting rib plate, 24-lower flange plate and 25-anchoring bolt.

Detailed Description

The flexible wind power tower with elastic connection as shown in fig. 1 comprises four tower shell sections 5 connected in sequence, wherein the tower shell sections 5 are respectively a tower shell section at the uppermost end of the tower, two tower shell sections at the middle part and a tower shell section at the bottommost part of the tower. And the tower barrel connecting flanges 8 used for connecting the tower barrel sections 5 of the adjacent sections are all common L-shaped flange plates. And a tower barrel door 4 is arranged on the bottommost tower barrel section 5, and the tower barrel door 4 is convenient for workers to enter or climb the inside of the tower barrel. The tower barrel section 5 at the bottom is fixedly connected to the upper end of the tower barrel transition section 3, and the tower barrel transition section 3 is installed on the tower foundation 1 through the base flange 2.

The tower frame shell sections 5 are of circular truncated cone-shaped tubular structures and are sequentially connected, the tower tube transition section 3 is also of a circular truncated cone-shaped tubular structure, the conicity of the cylinder walls of the tower frame shell sections 5 and the tower tube transition section 3 is the same, and the calibers of the cylinder ends at the upper end and the lower end are matched and connected with each other, so that an integral frustum tubular structure is formed, namely the tower frame shell sections 5 and the tower tube transition section 3 which are connected with each other are positioned on the same circular table surface.

As shown in fig. 2, a tower top flange 6 is welded to the top of the tower shell ring 5, the tower top flange 6 is in a flange disc-shaped structure, a plurality of tower top flange bolt holes 7 are arranged on the tower top flange 6, and the tower top flange bolt holes 7 are located on the same circumference. The tower top flange 6 is used for supporting and mounting the wind generating set.

As shown in fig. 3, tower tube connecting flanges 8 in an L-shaped flange structure are welded to both ends of each tower tube section 5, and the tower tube sections 5 of two adjacent sections are connected to each other through the tower tube connecting flanges 8. A plurality of bolt holes are uniformly distributed on the same circumference of the disc surface of the tower tube connecting flange 8, and pits are arranged on the joint surfaces of the bolt holes, so that a step bolt hole is formed. When the tower barrel section connecting device is connected and installed, the belleville springs 9 are embedded in pits of the corresponding step bolt holes, each flange bolt 10 or each step bolt hole corresponds to one belleville spring 9, and the flange bolts 10 penetrate through central holes of the corresponding tower barrel connecting flange 8 and the corresponding belleville spring 9 to connect the two adjacent tower barrel sections 5 together.

As shown in fig. 4 and 5, the upper end of the tower transition section 3 is fixedly connected with the tower section 5 at the bottom of the tower through a corresponding tower connecting flange 8. The lower end of the tower tube transition section 3 is connected with a base flange 2, the base flange 2 comprises a flange cylinder ring 21, and the upper end of the cylinder body of the flange cylinder ring 21 is welded with the lower end of the cylinder body of the tower tube transition section 3. An upper flange plate 22 and a lower flange plate 24 which are mutually spaced are welded on the cylinder wall of the flange cylinder ring 21, the upper flange plate 22 and the lower flange plate 24 are perpendicular to the cylinder wall of the flange cylinder ring 21 and respectively extend towards the inner side and the outer side of the cylinder wall along the radial direction of the cylinder wall, the upper flange plate 22 and the lower flange plate 24 on the inner side and the outer side of the cylinder wall of the flange cylinder ring 21 are both provided with a plurality of anchoring bolts 25 in a penetrating mode, and the lower ends of the anchoring bolts 25 are embedded in the tower foundation 1. And supporting ribbed plates 23 are arranged on two sides of each anchor bolt, and the upper end and the lower end of each supporting ribbed plate 23 are respectively welded on the upper flange plate 22 and the lower flange plate 24.

Claims

1. The utility model provides a flexible tower of elastic connection's wind-powered electricity generation, includes a plurality of interconnect's tower shell ring (5), its characterized in that: the tower barrel sections (5) which are connected with each other are fixedly connected to the upper end of a tower barrel transition section (3), and the lower end of the tower barrel transition section (3) is fixedly connected with the base flange (2); a belleville spring (9) is embedded between tower barrel connecting flanges (8) of two adjacent tower barrel sections (5), and a flange bolt (10) penetrates through the belleville spring (9) to connect the tower barrel connecting flanges (8) of the two adjacent tower barrel sections (5) with each other; the base flange (2) comprises a flange cylinder ring (21), an upper flange plate (22) and a lower flange plate (24) are welded on the flange cylinder ring (21), the upper flange plate (22) and the lower flange plate (24) extend to the inner side and the outer side of the cylinder wall respectively along the radial direction of the flange cylinder ring (21), a plurality of anchoring bolts (25) are respectively arranged on the upper flange plate (22) and the lower flange plate (24) on the inner side and the outer side of the cylinder wall of the flange cylinder ring (21) in a penetrating manner, supporting rib plates (23) are arranged on two sides of each anchoring bolt (25), and the upper end and the lower end of each supporting rib plate (23) are respectively welded on the upper flange plate (22) and the lower flange plate (24).

2. The resiliently connected wind power flexible tower of claim 1, wherein: the upper end of the cylinder body of the tower cylinder transition joint (3) is welded with a tower cylinder connecting flange (8); the lower end of the cylinder body of the tower cylinder transition section (3) is welded at the upper end of a flange cylinder ring (21) of the base flange (2).

3. The resiliently connected wind power flexible tower of claim 1, wherein: the top of a tower shell ring (5) positioned at the upper end of the tower is welded with a tower top flange (6), and a plurality of tower top flange screw holes (7) are uniformly distributed on the tower top flange (6).

4. The resiliently connected wind power flexible tower of claim 1, wherein: a plurality of flange bolts (10) are uniformly distributed on a tower cylinder connecting flange (8) of two adjacent tower cylinder sections (5) along the circumferential direction, each flange bolt (10) corresponds to one belleville spring (9), and the belleville springs (9) are embedded in pits of the tower cylinder connecting flange (8).

5. The resiliently connected wind power flexible tower of claim 1, wherein: the lower ends of the anchor bolts (25) are embedded in the tower foundation (1), and the upper ends of the anchor bolts (25) are arranged on the upper flange plate (22) and the lower flange plate (24) in a penetrating mode.

6. The resiliently connected wind power flexible tower of claim 1, wherein: and tower drum connecting flanges (8) of the tower drum sections (5) are all L-shaped flange discs.

7. The resiliently connected wind power flexible tower of claim 1, wherein: the tower frame shell ring (5) and the tower tube transition section (3) are both of circular truncated cone-shaped tubular structures, and the tower frame shell ring (5) and the tower tube transition section (3) which are connected with each other are located on the same circular table top.