CN214196556U

CN214196556U - Tower and wind generating set

Info

Publication number: CN214196556U
Application number: CN202022850278.1U
Authority: CN
Inventors: 丛欧; 刘艳军; 陈秋华; 张蒙蒙
Original assignee: Beijing Tianbin High Tech Wind Power Technology Co ltd
Current assignee: Beijing Tianbin High Tech Wind Power Technology Co ltd
Priority date: 2020-12-02
Filing date: 2020-12-02
Publication date: 2021-09-14
Anticipated expiration: 2030-12-02

Abstract

The utility model relates to a pylon and wind generating set. The tower comprises: the second tower body extends from the foundation along the first direction, and at least comprises a cylindrical structure formed by pouring concrete; the first tower body is coaxial with the second tower body and extends from the second tower body along a first direction, and the first tower body is of a cylindrical structure surrounded by metal plates; wherein the height of the second tower body is H, the total height of the tower is H, and H is less than or equal to 0.5 multiplied by H. This pylon has improved the whole rigidity of pylon through the coaxial second tower body that sets up in the bottom of first tower body, has increased the basis of first tower body in other words, and then has reduced the effective height of first tower body, has solved the security of super high pylon, has produced to take up an area of and hoist and mount time limit for a project scheduling problem, and economic nature is best.

Description

Tower and wind generating set

Technical Field

The utility model relates to a wind power generation technical field, concretely relates to pylon and wind generating set.

Background

With the gradual expansion of the single-machine capacity of the wind generating set, the height of the tower is higher and higher, namely, the tower is about to break through 150 m. The concrete tower is generally suitable for the area with the height of below 140m and high steel price, and if the concrete tower is applied to the area with the height of above 150m, the investment cost of a die is high, the production land area is large, the hoisting cost is too high, and the economical efficiency is poor. The flexible all-steel tower is mainly applied to a wind generating set with the height of 120m-140m at present, and when the flexible all-steel tower is applied to the height of more than 150m, a plurality of technical bottlenecks resonant with impeller frequency and generator rotating speed frequency exist due to the fact that a steel section is long and tower frequency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pylon and wind generating set, this pylon can solve the security of super high pylon, production take up an area of and hoist and mount time limit for a project scheduling problem, and economic nature is best.

In one aspect, the utility model provides a tower, include: the second tower body extends from the foundation along the first direction, and at least comprises a cylindrical structure formed by pouring concrete; the first tower body is coaxial with the second tower body and extends from the second tower body along a first direction, and the first tower body is of a cylindrical structure surrounded by metal plates; wherein the height of the second tower body is H, the total height of the tower is H, and H is less than or equal to 0.5 multiplied by H.

According to the utility model discloses an aspect, the second tower body includes first wall portion and the second wall portion of coaxial setting with first wall portion, and the tubular structure that first wall portion is the sheet metal spare and encloses, and the tubular structure that the second wall portion formed for concrete placement.

According to an aspect of the invention, in the first direction, the second tower body comprises at least two hybrid tower sections arranged in a stacked arrangement, and the first tower body comprises at least two first tower sections arranged in a stacked arrangement; the first flange is arranged at one end of the first wall portion of the mixed tower section positioned at the top of the second tower body, the first flange covers the end face of the mixed tower section, the first tower section is correspondingly provided with the second flange, and the first tower section and the mixed tower section are connected with each other through a first connecting piece penetrating through the first flange and the second flange.

According to an aspect of the invention, the second tower body further comprises a connection assembly comprising at least two pre-stressed members distributed along the circumferential interval of the second wall portion, each pre-stressed member running through the second flange and the first flange.

According to an aspect of the invention, each prestressing element comprises at least two segments of prestressing units distributed along the first direction, two adjacent segments of prestressing units being partially overlapped in the first direction and being connected to the second wall of the same hybrid tower segment.

According to an aspect of the present invention, in each mixing tower section, the second wall portion is provided on an outer peripheral side or an inner peripheral side of the first wall portion, and a length dimension of the first wall portion is smaller than a length dimension of the second wall portion; and one ends of the first wall parts of the adjacent mixing tower sections, which face each other, are respectively provided with a third flange, the third flanges extend outwards along the direction far away from the second wall parts, and an elastic part is further arranged between the third flanges of every two adjacent first wall parts.

According to an aspect of the utility model, in every mixed tower section, the second wall portion sets up in the periphery side and the inner periphery side of first wall portion, and the length dimension of first wall portion equals the length dimension of second wall portion, and first wall portion is provided with first flange respectively along the both ends of self length, through second connecting piece interconnect between the first flange of every two adjacent mixed tower sections, and the second wall portion is provided with corresponding to the second connecting piece and dodges the recess.

According to an aspect of the utility model, in every hybrid tower section, first wall portion includes along two at least arc tower walls of self circumference interval distribution, and two at least prestressing pieces and two at least arc tower walls distribute along the circumference interlock of second wall portion.

According to one aspect of the present invention, the hybrid tower segment comprises at least two hybrid arc-shaped tower segments circumferentially spaced apart from each other; and/or the first tower comprises at least two first arc-shaped tower sections which are distributed at intervals along the circumference of the first tower.

On the other hand, the utility model also provides a wind generating set, include the pylon as before.

The utility model provides a pair of pylon and wind generating set, this pylon is through setting up coaxial second tower body between first tower body and basis, wherein, the tubular structure that first tower body encloses for metal plate, the tubular structure that the second tower body formed including concrete placement at least, the whole rigidity of pylon has been improved, the basis of first tower body has been increased in other words, and then the effective height of first tower body has been reduced, the security of super high pylon has been solved, production area and hoist and mount time limit for a project scheduling problem, and economic nature is best.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Fig. 1 shows a schematic structural diagram of a wind turbine generator system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a tower according to an embodiment of the present invention;

fig. 3 shows an enlarged structural view of a region a in fig. 2;

fig. 4 is an enlarged schematic view of a region B in fig. 2;

fig. 5 is a schematic structural view of a tower according to an alternative embodiment of the present invention;

fig. 6 is an enlarged schematic view of a region C in fig. 5;

fig. 7 is a schematic structural view of a tower according to an alternative embodiment of the present invention;

fig. 8 is an enlarged schematic view of a region D in fig. 7;

fig. 9 is a schematic structural view of a tower according to an alternative embodiment of the present invention;

fig. 10 shows an enlarged structural view of a region E in fig. 9;

fig. 11 shows an enlarged schematic structure of a region F in fig. 9;

fig. 12 is a schematic structural view of a tower according to an alternative embodiment of the present invention;

fig. 13 shows a schematic sectional view of fig. 12 in the direction G-G.

Description of reference numerals:

10-a tower; 20-base; 30-a nacelle; 40-a generator; 50-an impeller; 501-a hub; 502-a blade;

1-a first tower; 11-a first tower section; x-a first direction; f1 — first flange; f2 — second flange; f3 — third flange;

2-a second tower; 21-a mixing tower section; 2 a-a first wall portion; 2 b-a second wall portion; 21 a-arc tower wall; l1 — first connector; l2 — second connector; l3-third connector; 22-avoiding the groove;

3-a pre-stressed part; 31-prestressing unit.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.

Referring to fig. 1, an embodiment of the present invention provides a wind turbine generator system, including a tower 10, a foundation 20, a nacelle 30, a generator 40, and an impeller 50.

The tower 10 is disposed on the foundation 20, the nacelle 30 is disposed on top of the tower 10, and the generator 40 is disposed inside or outside the nacelle 30. The impeller 50 includes a hub 501 and a plurality of blades 502 connected to the hub 501, and the impeller 50 is connected to the rotor of the generator 40 through the hub 501. When wind acts on the blades 502, the whole impeller 50 and the rotor of the generator 40 are driven to rotate, and the power generation requirement of the wind generating set is further met.

In order to improve the overall mechanical properties and stability of the tower 10 and meet the requirements for the supporting strength of the components such as the nacelle 30, the generator 40, and the impeller 50, the tower 10 generally adopts three types of towers: concrete rigid towers, flexible all-steel towers, and hybrid towers of steel combined with concrete.

The concrete rigid tower is generally suitable for an area with the height of below 140m and high steel price, and if the concrete rigid tower is applied to the height of above 150m, the concrete rigid tower has the problems of large production land, high mold input cost, long hoisting period and the like. The flexible all-steel tower is mainly applied to a wind generating set with the height of 120-140 m, and has the advantages of long single-section size, quick hoisting and good economical efficiency. When the tower is applied to the height of more than 150m, the technical bottlenecks of resonance with the rotating speed frequency of the impeller and the rotating speed frequency of the generator exist due to the fact that the steel section is long and the tower frequency is low.

In view of this, the utility model discloses it is expected to provide a steel and concrete combined hybrid tower, both satisfied being greater than 150 m's super high tower requirement, still keep concrete rigid tower and flexible full steel tower advantage separately simultaneously, solve super high tower's security, production and take up an area of and hoist and mount time limit for a project scheduling problem, and economic nature is best.

Referring again to fig. 1, embodiments of the present invention provide a tower 10 for a wind turbine generator system, the tower 10 comprising: a first tower 1 and a second tower 2.

The second tower body 2 is extended from the foundation along the first direction X, and the second tower body 2 at least includes a cylindrical structure formed by pouring concrete.

First tower body 1 and the coaxial setting of second tower body 2, and extend along first direction X by second tower body 2, first tower body 1 is the tubular structure that metal sheet encloses. Optionally, the sheet metal element is a steel sheet.

Wherein the height of the second tower body is H, the total height of the tower is H, and H is less than or equal to 0.5 multiplied by H. The total height H of the tower may be more than 150m, or may be between 90m and 150 m.

The second tower body 2 is coaxially arranged between the first tower body 1 and the foundation 20, which is equivalent to heightening the foundation 20 of the first tower body 1 formed by metal plates, so that the effective height of the first tower body 1 is reduced, and the technical bottleneck problem of resonance when the flexible all-steel tower is higher than 150m is solved.

In addition, since the second tower body 2 has a cylindrical structure formed by casting concrete at least, the height H thereof does not have to be set to be as high as the total height H of the tower body, so that the production site of the second tower body 2 can be reduced, the costs for the mold, the site personnel construction, and the like can be reduced, and the period for hoisting the components such as the nacelle 30, the generator 40, the impeller 50, and the like can be advantageously shortened. In addition, the second tower body 2 at least comprises a cylindrical structure formed by pouring concrete, so that the cost is low, the construction difficulty is low, and the economical efficiency of the tower 10 is improved. When flood disasters and other environmental influence factors exist in a wind power site, the second tower body 2 can also play a good role in water resistance and corrosion resistance, and the reliability of the tower 10 is improved.

The embodiment of the utility model provides a pair of pylon 10, through set up coaxial second tower body 2 between first tower body 1 and basis 20, wherein, the tubular structure that first tower body 1 encloses for metal plate, tubular structure that second tower body 2 formed including concrete placement at least, the bulk rigidity of pylon 10 has been improved, the basis of first tower body 1 has been increased in other words, and then the effective height of first tower body 1 has been reduced, the security of super high tower has been solved, production area and hoist and mount time limit for a project scheduling problem, and economic nature is best.

The following describes the concrete structure of the tower in detail with reference to the accompanying drawings.

Referring to fig. 2, a schematic structural diagram of a tower according to an embodiment of the present invention is shown, fig. 3 is an enlarged schematic structural diagram of a region a in fig. 2, and fig. 4 is an enlarged schematic structural diagram of a region B in fig. 2.

Referring to fig. 2 and 3, the second tower body 2 includes a first wall portion 2a and a second wall portion 2b disposed coaxially with the first wall portion 2a, the first wall portion 2a is a cylindrical structure surrounded by a metal plate, and the second wall portion 2b is a cylindrical structure formed by pouring concrete.

As shown in fig. 2 and 3, in the first direction X, the second tower body 2 comprises at least two hybrid tower sections 21 arranged in a stack and the first tower body 1 comprises at least two first tower sections 11 arranged in a stack.

Wherein, one end of the first wall part 2a of the hybrid tower section 21 at the top of the second tower body 2 is provided with a first flange F1, the first flange F1 covers the end face of the hybrid tower section 21, the first tower section 11 is correspondingly provided with a second flange F2, and the first tower section 11 and the hybrid tower section 21 are connected with each other through a first connecting piece L1 penetrating through the first flange F1 and the second flange F2.

Optionally, the second flange F2 is in smooth transition with the first tower section 11 to reduce stress concentrations. The first flange F1 is welded to the end of the first wall part 2a and the first flange F1 covers the end face of the hybrid tower section 21 so that the concrete cast second wall part 2b can withstand the pressure transmitted downward by the upper first tower body 1. The first connector L1 may be a bolt, a rivet, or other fastener. The first connector L1 can be fixed to the first wall portion 2a after passing through the second flange F2 and the first flange F1. Optionally, the first flange F1 and the second flange F2 also extend towards the inside of the first wall portion 2a and are connected to each other by a third connection L3, such that only tensile stresses are experienced between the first tower segment 11 and the first wall portion 2 a.

The tower 10 of the wind turbine generator system mainly bears bending moment and axial force, and the shearing force is small, namely the cross section of the tower 10 mainly bears tensile force and pressure. Since the first wall part 2a of the second tower body 2 and the first tower body 1 are metal towers, they can withstand large tensile stresses. The second wall part 2b cast of concrete can withstand larger pressures, while the sheet metal part of which the first wall part 2a is made is generally thinner and has less influence on the wall thickness of the second tower body 2, so that the cross-section of the second tower body 2 can be calculated approximately as the maximum cross-section of the second wall part 2 b. On one hand, the second tower body 2 can save metal plates and reduce the cost; on the other hand, the compressive property of the concrete is fully exerted, and the lateral instability of the metal plate is prevented.

Further, as shown in fig. 4, in each mixing tower segment 21, the second wall portion 2b is provided on the outer peripheral side or the inner peripheral side of the first wall portion 2a, and the length dimension of the first wall portion 2a is smaller than the length dimension of the second wall portion 2 b.

The first wall parts 2a of adjacent mixing tower segments 21 are further provided with a third flange F3 at their ends facing each other, respectively, the third flange F3 extends outwardly in a direction away from the second wall part 2b, and a resilient member S is further provided between the third flanges F3 of every two adjacent first wall parts 2 a.

The fastening member passes through the fixing hole of the third flange F3 of the two adjacent hybrid tower segments 21 and the elastic member S, and the elastic connection of the two adjacent hybrid tower segments 21 in the height direction can be realized. The elastic member S may be a flexible spring pad or the like, and when the upper first tower segment 11 is compressed, the pressure is transmitted to the elastic member S through the third flange F3, and since the elastic member S is a flexible member, it can be compressed and deformed, thereby reducing the pressure therein, ensuring that no or less pressure is transmitted between two adjacent third flanges F3 in the height direction, and the pressure is transmitted through the inner second wall portion 2 b. In addition, the joint of the third flanges F3 of two adjacent hybrid tower sections 21 in the height direction needs to be sealed, so that the hybrid tower can be prevented from being corroded by water and rainwater.

Optionally, the first tower segment 11 comprises at least two first arc-shaped tower segments circumferentially spaced apart along itself. Optionally, the hybrid tower segment 21 as described above comprises at least two hybrid arc-shaped tower segments circumferentially spaced apart along itself.

In practical application, due to the limitations of road transportation conditions, such as the bearing capacity of transportation tools and height-limited bridges, the tower is generally divided into a plurality of tower sections along the axial direction, each tower section is divided into a plurality of arc-shaped members along the circumferential direction, and after the arc-shaped members are manufactured at a processing site, the arc-shaped members are transported to an assembly site to meet the transportation requirements. When the tower is transported to a wind power site for assembly, the plurality of arc-shaped components are spliced into tower sections, and then the plurality of tower sections are assembled into a complete tower frame.

Fig. 5 shows a schematic structural diagram of a tower according to an alternative embodiment of the present invention, and fig. 6 shows an enlarged schematic structural diagram of a region C in fig. 5.

As shown in fig. 5 and 6, embodiments of the present invention also provide a tower, which is similar to the tower shown in fig. 2, except that the second tower body 2 further comprises a connection assembly.

In particular, the connection assembly of the second tower 2 comprises at least two pre-stressing members 3 spaced apart along the circumference of the second wall part 2b, each pre-stressing member 3 extending through the second flange F2 and the first flange F1. The pre-stress member 3 is located in the second wall part 2b on the outer periphery side of the first wall part 2a, and can assist the first wall part 2a to bear the tensile stress together, so that the requirement of the tensile strength of the second tower body 2 is reduced.

As shown in fig. 6, when the height h of the second tower body 2 is small, for example, the height of the second tower body 2 only satisfies the height dimension of waterlogging resistance or is larger than the height dimension of the door body, for example, about 10m, optionally, the pre-stressed member 3 is a whole structural member penetrating through the second wall portion 2b of the second tower body 2 to improve the supporting strength of the tower 10.

When the height h of the second tower body 2 is larger, since the second tower body 2 is a hybrid tower body, the cross-sectional load thereof varies, for example, the load to be borne by the bottom of the second tower body 2 is larger, and the load to be borne by the second tower body 2 is gradually smaller toward the top, in order to uniformly distribute the tensile strength of the same pre-stressed member 3 at each position, optionally, each pre-stressed member 3 comprises at least two pre-stressed units 31 sequentially distributed in the first direction X, and the tensile strength of more than two pre-stressed units 31 of the pre-stressed member 3 is gradually reduced. On the basis of satisfying the bearing capacity requirement of mixing the tower body like this, can furthest reduce the cost of mixing the tower body, guarantee wind generating set's the benefit of generating electricity.

In some alternative embodiments, the cross-sectional area of more than two sections of the pre-stressing units 31 of the pre-stressing member 3 decreases section by section along the first direction X of the second tower body 2. Alternatively, the material of each prestressing unit 31 of the prestressing member 3 is the same. That is, the areas of the cross sections of the two adjacent segments of the prestressed units 31 in the height direction are different, and the tensile strength requirement of each segment of the prestressed units 31 can be met by selecting the prestressed units 31 with different radial dimensions.

In some alternative embodiments, the material of more than two sections of the pre-stressing units 31 of the pre-stressing member 3 may be different along the height direction of the second tower body 2, so as to meet the requirement of tensile strength of each pre-stressing unit 31.

Further, two adjacent sections of the prestressing elements 31 partly overlap in the first direction X of the second tower 2 and are connected to the same second wall part 2 b. The arrangement can ensure that the second wall part 2b of the hybrid tower section 21 is connected into a whole by the pre-stressed part 3, the safety of the second tower body 2 is improved, and the safety and the reliability of the whole tower 10 are further improved.

Fig. 7 shows a schematic structural diagram of a tower according to an alternative embodiment of the present invention, and fig. 8 shows an enlarged schematic structural diagram of a region D in fig. 7.

As shown in fig. 7 and 8, embodiments of the present invention also provide a tower similar to the tower shown in fig. 2 or 5, except that the second wall portion 2b of the second tower body 2 is arranged at the inner circumference of the first wall portion 2 a.

The second tower body 2 may be provided with the pre-stressing element 3 as described above or may be free of the pre-stressing element 3. When the prestressed member 3 is arranged in the second tower body 2, the prestressed member 3 is positioned in the second wall portion 2b on the inner circumferential side of the first wall portion 2a, so that the first wall portion 2a can bear the tensile stress together, and the requirement of the tensile strength of the second tower body 2 can be reduced. The other structure of the second tower body 2 is similar to the structure shown in fig. 2 and will not be described again.

Fig. 9 shows a schematic structural view of a tower according to an alternative embodiment of the present invention, fig. 10 shows an enlarged schematic structural view of a region E in fig. 9, and fig. 11 shows an enlarged schematic structural view of a region F in fig. 9.

Referring to fig. 9, 10 and 11, the present invention further provides a tower 10, which is similar to the tower 10 shown in fig. 2, except that the second wall 2b of the second tower body 2 is disposed on the inner periphery side and the outer periphery side of the first wall 2a, and the flexural rigidity is higher.

Specifically, in each mixing tower segment 21, the second wall parts 2b are disposed on the outer peripheral side and the inner peripheral side of the first wall part 2a, the length dimension of the first wall part 2a is equal to the length dimension of the second wall part 2b, the first wall part 2a is provided with first flanges F1 along both ends of the length thereof, the first flanges F1 of each two adjacent mixing tower segments 21 are connected to each other by a second connecting member L2, and the second wall part 2b is provided with an escape groove 22 corresponding to the second connecting member L2.

As shown in fig. 10, the second flange F2 is smoothly connected to the first tower segment 11 to reduce stress concentration. The first flange F1 is welded to the end of the first wall part 2a and the first flange F1 covers at least the end face of the hybrid tower section 21 so that the second wall part 2b can withstand the pressure transmitted downwards by the upper first tower 1. The first connector L1 can be fixed to the second wall portion 2b after passing through the second flange F2 and the first flange F1. The first connecting pieces L1 may be fastening pieces such as bolts and rivets, and are provided on the inner and outer circumferential sides of the first tower segment 11 and the hybrid tower segment 21, thereby improving the reliability of connection between the second tower body 2 and the first tower body 1.

As shown in fig. 11, the first wall portion 2a of each hybrid tower segment 21 is provided with first flanges F1 at two ends along the length thereof, the first flanges F1 of two adjacent hybrid tower segments 21 are connected to each other through a second connecting member L2, and the second wall portion 2b is correspondingly provided with an avoiding groove 22 for fixing the second connecting member L2 between the first flanges F1 of two adjacent hybrid tower segments 21.

As mentioned above, the tower 10 of the wind turbine is mainly subjected to bending moments and axial forces, and the shear forces are small, i.e. the cross section of the tower 10 is mainly subjected to tensile and compressive forces. Since the first wall part 2a of the second tower body 2 and the first tower body 1 are both metal towers, they can withstand large tensile stresses. The second wall part 2b cast of concrete can withstand larger pressures, while the sheet metal part of which the first wall part 2a is made is generally thinner and has less influence on the wall thickness of the second tower body 2, so that the cross-section of the second tower body 2 can be calculated approximately as the maximum cross-section of the second wall part 2 b. On one hand, the second tower body 2 can save metal plates and reduce the cost; on the other hand, the compressive property of the concrete is fully exerted, and the lateral instability of the metal plate is prevented.

Fig. 12 shows a schematic structural view of a tower according to an alternative embodiment of the present invention, and fig. 13 shows a schematic sectional view of fig. 12 along the G-G direction.

Referring to fig. 12 and 13 together, the present invention also provides a tower 10, which is similar in structure to the tower 10 shown in fig. 9 to 11, except that the second tower body 2 includes a connection assembly, and the first wall portion 2a has a different structure.

Specifically, in each mixing tower segment 21, the first wall portion 2a includes at least two arc-shaped tower walls 21a spaced apart from each other in the circumferential direction, and the at least two pre-stressing members 3 are staggered from the at least two arc-shaped tower walls 21a in the circumferential direction of the second wall portion 2 b.

The prestressed pieces 3 and the arc-shaped tower walls 21a of the first wall part 2a are distributed in a staggered manner along the circumferential direction of the second tower body 2, and the prestressed pieces 3 can assist the first wall part 2a to bear the tensile stress together, so that the requirement on the tensile strength of the second tower body 2 is reduced, and the mechanical stability and the reliability of the tower 10 are improved.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A tower, comprising:

a second tower (2) extending from a foundation in a first direction (X), the second tower (2) comprising at least a concrete cast tubular structure;

the first tower body (1) is coaxial with the second tower body (2) and extends from the second tower body (2) along the first direction (X), and the first tower body (1) is of a cylindrical structure surrounded by metal plates;

the height of the second tower body (2) is H, the total height of the tower is H, and H is less than or equal to 0.5 multiplied by H.

2. A tower according to claim 1, wherein the second tower body (2) comprises a first wall part (2a) and a second wall part (2b) arranged coaxially with the first wall part (2a), the first wall part (2a) being a cylindrical structure of sheet metal parts and the second wall part (2b) being a cylindrical structure of poured concrete.

3. Tower according to claim 2, wherein in the first direction (X) the second tower body (2) comprises at least two hybrid tower sections (21) arranged in a stack, and the first tower body (1) comprises at least two first tower sections (11) arranged in a stack;

wherein, be located at second tower body (2) top mix tower section (21) the one end of first wall portion (2a) is provided with first flange (F1), first flange (F1) cover mix the terminal surface of tower section (21), first tower section (11) correspondence is provided with second flange (F2), first tower section (11) with mix between the tower section (21) through running through first flange (F1) with first connecting piece (L1) interconnect of second flange (F2).

4. A tower according to claim 3, wherein the second tower body (2) further comprises a connection assembly comprising at least two pre-stressed members (3) spaced apart in the circumferential direction of the second wall portion (2b), each pre-stressed member (3) extending through the second flange (F2) and the first flange (F1).

5. A tower according to claim 4, characterised in that each of said pre-stressing elements (3) comprises at least two segments (31) of pre-stressing elements distributed along said first direction (X), two adjacent segments (31) of said pre-stressing elements partially overlapping in said first direction (X) and being connected to said second wall portion (2b) of the same hybrid tower segment (21).

6. A tower according to any of the claims 3-5, wherein in each of said hybrid tower sections (21), said second wall portion (2b) is arranged on the outer or inner circumferential side of said first wall portion (2a), and the length dimension of said first wall portion (2a) is smaller than the length dimension of said second wall portion (2 b);

the first wall parts (2a) of the adjacent mixing tower sections (21) are also respectively provided with a third flange (F3) at one end facing each other, the third flange (F3) extends outwards along the direction away from the second wall part (2b), and an elastic piece (S) is also arranged between the third flanges (F3) of every two adjacent first wall parts (2 a).

7. Tower according to claim 4 or 5, characterised in that in each of said hybrid tower segments (21) said second wall part (2b) is arranged on the outer and inner circumferential side of said first wall part (2a) and the length dimension of said first wall part (2a) is equal to the length dimension of said second wall part (2b), said first wall part (2a) is provided with said first flanges (F1) along both ends of its length, said first flanges (F1) of each two adjacent hybrid tower segments (21) are interconnected by a second connecting element (L2), said second wall part (2b) is provided with an escape groove (22) corresponding to said second connecting element (L2).

8. A tower according to claim 7, characterised in that in each of said hybrid tower segments (21), said first wall portion (2a) comprises at least two curved tower walls (21a) circumferentially spaced apart from each other, at least two of said pre-stressing members (3) being staggered with respect to at least two curved tower walls (21a) in the circumferential direction of said second wall portion (2 b).

9. A tower according to claim 3, wherein said hybrid tower segment (21) comprises at least two hybrid arc-shaped tower segments circumferentially spaced apart along itself; and/or the first tower segment (11) comprises at least two first arc-shaped tower segments which are distributed at intervals along the circumference of the first tower segment.

10. A wind turbine generator set, comprising: the tower of any one of claims 1 to 9.