CN114198263A

CN114198263A - Tower and wind generating set

Info

Publication number: CN114198263A
Application number: CN202010988548.7A
Authority: CN
Inventors: 刘艳军; 邹景涛; 冯玉江; 高鑫; 朱华希
Original assignee: Beijing Tianbin High Tech Wind Power Technology Co ltd
Current assignee: Beijing Tianbin High Tech Wind Power Technology Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2022-03-18

Abstract

The invention relates to a tower and a wind generating set, the tower comprises: the tower body comprises more than two basic cylinder sections which are arranged in a stacking mode along the height direction of the tower body; the connecting assembly is arranged on the tower body and comprises more than two prestressed pieces distributed at intervals along the circumferential direction of the tower body, the prestressed pieces extend along the height direction and are connected to each foundation cylinder section, at least one prestressed piece comprises more than two prestressed units distributed along the height direction, and the tensile strength of the more than two prestressed units of the prestressed pieces is reduced section by section. According to the tower and the wind generating set provided by the embodiment of the invention, the tower can meet the bearing requirement, the cost is lower, and the cost control of the wind generating set is facilitated.

Description

Tower and wind generating set

Technical Field

The invention relates to the technical field of wind power, in particular to a tower and a wind generating set.

Background

With the rapid development of the wind power industry, the capacity of a single machine of a wind turbine generator set is continuously increased, and in order to effectively utilize wind energy, a fan tower is also made higher. The tower is used as a bearing and supporting part of the whole wind generating set, the cost of the tower basically accounts for about one fourth of the cost of the whole fan, and the cost control is also important besides ensuring the normal operation of the wind generating set under various load conditions and the safety of the wind generating set under severe external conditions.

Commonly used towers include truss towers, tapered steel tower drums and concrete tower drums, wherein the concrete towers are widely used, and in order to ensure the bearing capacity of the concrete towers, prestressed parts are usually arranged in the concrete towers. The existing concrete tower frame is usually provided with the whole prestressed part inside, and the problem of overhigh cost is caused by the fact that the tensile strength capability of partial areas is not matched with the requirements of the areas where the prestressed part is located, so that the cost control of a wind generating set is not facilitated.

Therefore, a new tower and wind turbine generator set are needed.

Disclosure of Invention

The embodiment of the invention provides a tower and a wind generating set, wherein the tower can meet the bearing requirement, is low in cost and is beneficial to cost control of the wind generating set.

In one aspect, a tower is provided according to an embodiment of the present invention, including: the tower body comprises more than two basic cylinder sections which are arranged in a stacking mode along the height direction of the tower body; the connecting assembly is arranged on the tower body and comprises more than two prestressed pieces distributed at intervals, each prestressed piece is connected to each foundation cylinder section, at least one prestressed piece comprises more than two prestressed units distributed in sequence in the height direction, and the tensile strength of the prestressed units of the prestressed pieces is gradually reduced.

According to an aspect of an embodiment of the present invention, the cross-sectional area of the pre-stress unit of the pre-stress member is reduced section by section in a height direction.

According to an aspect of the embodiment of the present invention, each of the pre-stressed members includes two or more pre-stressed units sequentially distributed in a height direction, and the pre-stressed units included in each of the pre-stressed members are equal in number and are arranged in a one-to-one correspondence manner.

According to an aspect of the embodiment of the present invention, a sum of lengths of two or more stages of the prestressing unit of the prestressing member is greater than a sum of two or more basic cylinder sections in a height direction, and two adjacent stages of the prestressing unit of the prestressing member are partially overlapped in the height direction.

According to an aspect of the embodiment of the present invention, in the two or more prestressed units of the prestressed member, end portions of the adjacent two prestressed units facing each other are overlapped with each other in a height direction and connected to the same foundation cylinder section.

According to an aspect of the embodiment of the present invention, at least one base cylinder section is provided with grooves at both ends in a height direction, and of two adjacent sections of the pre-stressed units of the pre-stressed member, one of the two adjacent sections of the pre-stressed units passes through the base cylinder section and is fixed in the groove at one end of the base cylinder section, and the other one of the two adjacent sections of the pre-stressed units passes through the same base cylinder section and is fixed in the groove at the other end of the base cylinder section.

According to an aspect of the embodiment of the invention, an anchor plate is arranged inside at least one foundation cylinder section, and two adjacent sections of the prestressed units of the prestressed member are connected to the anchor plate inside the same foundation cylinder section.

According to an aspect of the embodiment of the present invention, the number of the anchor plates inside the foundation cylinder section is one, and of the two adjacent prestressing units of the prestressing member, one prestressing unit is connected to one end surface of the anchor plate in the height direction, and the other prestressing unit is connected to the other end surface of the same anchor plate in the height direction;

according to an aspect of the embodiment of the present invention, the number of the anchor plates inside the foundation cylinder section is two and the anchor plates are arranged at intervals in the height direction, and one of the two adjacent prestressing units of the prestressing member is connected to one of the anchor plates, and the other prestressing unit is connected to the other anchor plate.

According to an aspect of the embodiment of the present invention, in the two or more prestressing units of the prestressing member, ends of the adjacent prestressing units facing each other overlap each other in a height direction and are connected to different base cylinder sections, and an end of each prestressing unit passes through one of the base cylinder sections and is connected to a side wall of the other base cylinder section disposed adjacent thereto.

According to one aspect of the embodiment of the invention, the side wall of the base cylinder section connected with the pre-stress unit is provided with a notch, the pre-stress unit is positioned in one base cylinder section, and the end part of the pre-stress unit extends into the notch of the other base cylinder section which is adjacently arranged and is connected to the surface which encloses the notch;

according to one aspect of the embodiment of the invention, the inner wall of the base cylinder section is provided with a fixing protrusion, the pre-stressing unit is at least partially positioned outside the base cylinder section, and the end part of the pre-stressing unit passes through the fixing protrusion and is connected to the fixing protrusion.

According to an aspect of the embodiment of the present invention, the tower body further includes an adapter cylinder section, the adapter cylinder section is stacked on the base cylinder section located on the outermost side in the height direction, and the pre-stressing unit located near the adapter cylinder section extends into and is connected to the adapter cylinder section.

According to an aspect of the embodiment of the invention, the tower further comprises a fixing assembly, the fixing assembly comprises more than two fixing rod pieces distributed at intervals, and the fixing rod pieces penetrate through the adapter cylinder section and at least part of the foundation cylinder section and connect the adapter cylinder section and the foundation cylinder section.

In another aspect, according to an embodiment of the present invention, a wind turbine generator set is provided, which includes the tower described above.

According to the tower and the wind generating set provided by the embodiment of the invention, the tower comprises a tower body and a connecting assembly, the tower body comprises more than two basic cylinder sections which are arranged in a stacked mode, the connecting assembly comprises more than two prestressed pieces which are arranged at intervals in the circumferential direction of the tower body, and each prestressed piece can extend in the height direction of the tower body and connects the more than two basic cylinder sections so as to ensure the safety of the tower body. Because at least one prestressed part comprises more than two prestressed units distributed along the height direction, the tensile strength of the prestressed units of the prestressed parts is reduced section by section, through the arrangement, the prestressed units with the adaptive tensile strength can be selected according to the load requirements of different positions of the tower body, the strength requirement of the tower can be ensured, meanwhile, all the prestressed units of the prestressed parts do not need to meet the parameter requirement of the highest position of the bearing requirement, on the basis of meeting the bearing requirement, the cost is lower, and the cost control of the wind generating set is facilitated.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of a wind turbine generator system according to an embodiment of the present invention;

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

FIG. 3 is a schematic structural diagram of a prestressing member according to an embodiment of the present invention;

FIG. 4 is a top view of a tower of one embodiment of the present invention;

FIG. 5 is a top view of a tower of another embodiment of the present invention;

FIG. 6 is a schematic structural view of a foundation barrel section in accordance with one embodiment of the present invention;

FIG. 7 is a schematic view of the pre-stressed member and the foundation cylinder segments according to one embodiment of the present invention;

FIG. 8 is a schematic structural view of a tower according to yet another embodiment of the present invention;

FIG. 9 is a schematic structural view of a tower according to yet another embodiment of the present invention;

FIG. 10 is a schematic structural view of a tower according to yet another embodiment of the present invention;

FIG. 11 is a schematic structural view of a foundation barrel section of yet another embodiment of the present invention;

FIG. 12 is a schematic structural view of a tower according to yet another embodiment of the present invention.

Wherein:

1-a tower;

10-a column body; 11-a base drum section; 111-grooves; 112-anchor plate; 113-a notch; 114-a fixed protrusion;

12-a transfer cylinder; 121-a cartridge body; 122-a flange assembly; 122 a-inner flange; 122 b-outer flange;

20-a connecting assembly; 21-a pre-stressed member; 211-a pre-stressing unit;

30-a stationary component; 31-fixing the rod member;

2-a fan foundation;

3-a cabin; 4-a generator; 5-an impeller; 501-a hub; 502-a blade;

x-height direction; y-circumferential direction.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

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 present invention by illustrating examples of the present 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 following description is given with the directional terms shown in the drawings and is not intended to limit the tower and the specific structure of the wind turbine generator system 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 either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

For a better understanding of the invention, a tower and a wind park according to an embodiment of the invention are described in detail below with reference to fig. 1 to 12.

Referring to fig. 1, an embodiment of the present invention provides a wind turbine generator set, which may include a wind turbine foundation 2, a tower 1, a nacelle 3, a generator 4, and an impeller 5. The tower 1 is arranged on the fan foundation 2, the engine room 3 is arranged on the tower 1, and the generator 4 is arranged on the engine room 3. In some examples, the generator 4 may be located outside the nacelle 3, although in some embodiments the generator 4 may also be located inside the nacelle 3. The impeller 5 comprises a hub 501 and a plurality of blades 502 connected to the hub 501, and the impeller 5 is connected to the rotor of the generator 4 through its hub 501. When wind power acts on the blades 5, the whole impeller 5 and the rotor of the generator 4 are driven to rotate, and the power generation requirement of the wind generating set is further met.

In order to enable the tower 1 to meet the supporting strength requirements of the components such as the nacelle 3, the generator 4, the impeller 5 and the like, the tower 1 usually includes the prestressed member 21, and in the conventional tower 1, the prestressed member 21 is mostly in a whole structural form from bottom to top, because the load of the cross section of the tower 1 is changed and changed greatly, for example, the load borne by the top and the bottom of the tower 1 sometimes differs by more than one time, when the whole prestressed member 21 is adopted, if the tensile strength of the prestressed member 21 can meet the bottom requirements, the tensile strength capability of the top prestressed member 21 is more tolerant. Because the cost difference of the prestressed pieces 21 with different tensile strengths is large, the cost of the tower frame 1 is wasted by adopting the whole prestressed piece 21 with the same bearing capacity, and the maximization of the power generation benefit of the wind generating set is not facilitated.

Referring to fig. 2 to 4, in view of the above problems, the embodiment of the present invention further provides a new tower frame 1, where the tower frame 1 can be used in the wind turbine generator set, can meet the load bearing requirement, and can ensure the power generation efficiency of the wind turbine generator set.

The tower frame 1 provided by the embodiment of the invention comprises a tower body 10 and a connecting assembly 20, wherein the tower body 10 comprises more than two basic cylinder sections 11, and the more than two basic cylinder sections 11 are stacked along the height direction X of the tower body 10. The connecting assembly 20 is disposed on the tower body 10, the connecting assembly 20 includes two or more pre-stressed members 21 distributed at intervals along the circumferential direction Y of the tower body 10, the pre-stressed members 21 extend along the height direction X and are connected to each of the base cylinder segments 11, at least one pre-stressed member 21 includes two or more pre-stressed units 211 distributed along the height direction X, and the tensile strength of the two or more pre-stressed units 211 of the pre-stressed member 21 is reduced section by section. That is, the tensile strength of the same pre-stressing unit 211 is the same, and the difference between the tensile strength of two adjacent pre-stressing units 211 of the pre-stressing member 21 is greater than zero.

When the tower 1 provided by the embodiment of the invention is used for a wind generating set, the load to be borne by the tower 1 is larger at the bottom of the tower 1, and the load to be borne by the tower 1 is gradually smaller towards the top. By reducing the tensile strength of more than two sections of the prestressed units 211 of at least one prestressed member 21 section by section, the tensile strength of the prestressed unit 211 arranged on the side of the tower 1 close to the nacelle 3 can be smaller than the tensile strength of the prestressed unit 211 arranged on the side of the tower 1 close to the fan foundation 2. That is, the prestressed units 211 with adaptive tensile strength can be selected according to the load requirements of different positions of the tower body 10, so that the strength requirement of the tower frame 1 can be ensured, and simultaneously, all the prestressed units 211 without the prestressed pieces 21 all meet the parameter requirement of the highest position of the bearing requirement, so that the tower frame 1 has lower cost on the basis of meeting the bearing requirement, and is beneficial to the cost control of the wind generating set.

As an alternative embodiment, each of the pre-stressing members 21 of the connecting assembly 20 may include two or more pre-stressing units 211 distributed along the height direction X, and the tensile strength of the two or more pre-stressing units 211 of each pre-stressing member 21 decreases section by section. On the basis of meeting the requirement of the bearing capacity of the tower frame 1, the cost of the tower frame 1 can be reduced to the greatest extent, and the power generation benefit of the wind generating set is ensured.

Optionally, the prestressed units 211 included in each prestressed member 21 are the same in number and are arranged in a one-to-one correspondence manner, and in the circumferential direction Y, the tensile strengths of the prestressed units 211 arranged in the prestressed members 21 opposite to each other are the same. So that the bearing capacity of the tower frame 1 at each position in the circumferential direction Y is uniform, and the safety performance of the tower frame is improved.

As shown in fig. 3 and 4, in some alternative embodiments, the cross-sectional area of two or more prestressed units 211 of the prestressed member 21 decreases section by section along the height direction X of the tower 1. That is, the areas of the cross sections of the two adjacent segments of the prestressed units 211 in the height direction X are different, and the prestressed units 211 with different radial dimensions can be selected to meet the requirement of tensile strength of each segment of the prestressed units 211.

Alternatively, in the tower 1 of the above embodiment, the material of each prestressing unit 211 of the prestressing member 21 may be the same. Of course, in some embodiments, the tensile strength requirement of each pre-stressing unit 211 can also be satisfied by using different materials for each pre-stressing unit 211 of the pre-stressing member 21.

Referring to fig. 2 to 5, as an alternative embodiment, a tower frame 1 according to an embodiment of the present invention is provided, in which a sum of lengths of two or more prestressed units 211 of a prestressed member 21 is greater than a sum of lengths of two or more base cylinder sections 11, and two adjacent prestressed units 211 are partially overlapped in a height direction X to form an overlapping region M. Through the arrangement, the connection between each prestress unit 211 and the corresponding foundation cylinder section 11 can be better met, and each prestress piece 21 is favorable for connecting more than two foundation cylinder sections 11 into a whole.

The sum of the lengths of the two or more prestressing units 211 refers to the sum of the lengths of the two or more prestressing units 211 or the sum of the lengths, and the sum of the two or more basic cylinder sections 11 refers to the sum of the lengths of the two or more basic cylinder sections 11 or the sum of the lengths. The two adjacent pre-stressing units 211 partially overlap in the height direction X may mean that the two adjacent pre-stressing units 211 may pass through the same section of the cylindrical section region of the base cylindrical section 11 in the height direction X at the same time, and the two adjacent pre-stressing units 21 may be spaced in the thickness direction of the side wall of the tower body 10, and may be spaced in the circumferential direction Y of the tower body 10.

That is, alternatively, as shown in fig. 4, in some embodiments, the projections of two adjacent prestressed units 211 of the same prestressed member 21 in the height direction X are located on two different reference circles, and of course, it is also possible to adopt a form as shown in fig. 5, in which the projections of two adjacent prestressed units 211 of the same prestressed member 21 in the height direction X are located on the same reference circle.

In some optional embodiments, the prestressed member 21 includes a number of prestressed units 211 smaller than or equal to the number of the base cylinder segments 11. For example, the prestressed member 21 may be provided with one prestressed unit 211 corresponding to each basic cylinder segment 11, and of course, each prestressed unit 211 may be sequentially connected to two or more basic cylinder segments 11, and specifically, may be provided according to the load requirement of the tower 1 in the height direction X.

As an alternative embodiment, in the two or more prestressed units 211 of each prestressed member 21, the ends of the two adjacent prestressed units 211 facing each other overlap each other in the height direction X and are connected to the same foundation cylinder 11. Through the arrangement, when the prestress piece 21 meets the requirement of setting the tensile strength of the prestress unit 211 according to different load requirements of the tower frame 1 in the height direction X, the connection of the prestress piece 21 to each basic cylinder section 11 can be ensured, and the tower frame 1 has higher safety performance.

Referring to fig. 2 to 6, in some alternative embodiments, two ends of at least one base cylinder 11 in the height direction X are respectively provided with a groove 111, and of two adjacent sections of the pre-stressing units 211 of the pre-stressing member 21, one of the pre-stressing units 211 penetrates through the base cylinder 11 and is fixed in the groove 111 at one end of the base cylinder 11, and the other pre-stressing unit 211 penetrates through the same base cylinder 11 and is fixed in the groove 111 at the other end of the base cylinder 11. Through the arrangement, more than two basic cylinder sections 11 can be connected into a whole through the pre-stressing piece 21, and meanwhile, the connection between the pre-stressing unit 211 and the corresponding basic cylinder section 11 can be facilitated.

Alternatively, each pre-stressing member 21 may be disposed inside the tower body 10, i.e. in the wall of the tower body 10, or embedded in the wall of the tower body 10, one end of each pre-stressing unit 211 is connected to the end of one of the basic cylinder sections 11, and the other end of the pre-stressing unit 211 passes through at least one of the basic cylinder sections 11 and is connected to the end of the other basic cylinder section 11.

For better understanding of the embodiment of the present invention, the tower body 10 including four basic cylinder segments 11 and each pre-stressing member 21 including three pre-stressing units 211 will be exemplified below.

Referring to fig. 7, from bottom to top, one end of the first pre-stressing unit 211a is connected to the bottom end of the first base cylinder 11a and is located in the groove 111 at the bottom end, and the other end of the first pre-stressing unit 211a passes through the first base cylinder 11a and the second base cylinder 11b and is anchored in the groove 111 of the second base cylinder 11b far from the end face of the first base cylinder 11 a. One end of the second pre-stressing unit 211b is connected to the bottom end of the second basic cylinder 11b and is located in the groove 111 at the bottom end, and the other end of the second pre-stressing unit 211b passes through the second basic cylinder 11b and the third basic cylinder 11c and is anchored in the groove 111 of the third basic cylinder 11c far from the end face of the second basic cylinder 11 b. Correspondingly, one end of the third section of pre-stressing unit 211c is connected to the bottom end of the third basic cylinder section 11c and is located in the groove 111 at the bottom end, and the other end of the third section of pre-stressing unit 211c passes through the third basic cylinder section 11c and the fourth basic cylinder section 11d and is anchored in the groove 111 of the fourth basic cylinder section 11d far away from the end face of the third basic cylinder section 11 c.

Through the above arrangement, the end portions of the first segment pre-stressing unit 211a and the second segment pre-stressing unit 211b which are adjacently arranged are overlapped with each other in the height direction X and are simultaneously connected with the second basic cylinder segment 11b, and the end portions of the second segment pre-stressing unit 211b and the third segment pre-stressing unit 211c which are adjacently arranged are overlapped with each other in the height direction X and are simultaneously connected with the third basic cylinder segment 11 c. That is, the foundation cylinder sections 11 can be connected into a whole by the two or more prestressing units 211 of the same prestressing member 21, so that the strength requirement of the tower body 10 can be ensured.

Referring to fig. 8, it can be understood that, when the four basic cylinder segments 11 are connected by the same prestressing member 21, the prestressing member 21 is not limited to include three prestressing units 211. In some embodiments, the prestressed member 21 may also include two prestressed units 211, one prestressed unit 211 connects three basic cylinder sections 11, the other prestressed unit 211 connects two basic cylinder sections 11, one end of each of the two prestressed units 211 close to each other is connected to the same basic cylinder section 11, and the two basic cylinder sections 11 can be connected into a whole through more than two prestressed units 211 of the same prestressed member 21, so as to ensure the strength requirement of the tower body 10.

It is understood that the manner of connecting two or more basic cylinder segments 11 into a whole by installing the pre-stressing unit 211 in the form of the groove 111 on the basic cylinder segment 11 is only an alternative embodiment, but is not limited to the above manner. With continued reference to fig. 8, in some embodiments, at least one of the base cylinder segments 11 may be provided with an anchor plate 112 therein, and two adjacent prestressing units 211 of the prestressing element 21 are connected to the anchor plate 112. With the above arrangement, the foundation tubular sections 11 of the tower body 10 can be connected into a whole by two or more prestressed cables of the same prestressed member 21. Moreover, the arrangement of the anchor plate 112 can transmit the load borne by the pre-stress unit 211 to the foundation cylinder section 11 through the anchor plate 112, so that load transition is better realized, the transmission requirement of the load is ensured, and the effect of diffusing stress can be achieved.

As shown in fig. 8, alternatively, the number of the anchor plates 112 in the same basic cylinder section 11 may be one, and of the two adjacent prestressing units 211 of the prestressing member 21, one prestressing unit 211 is connected to one end surface of the anchor plate 112 in the height direction X, and the other prestressing unit 211 is connected to the other end surface of the anchor plate 112 in the height direction X. Illustratively, the anchor plate 112 may be connected in an anchored manner. Through the arrangement, two adjacent prestress units 211 can be connected to the anchor plate 112 in the same basic cylinder section 11, and the connection requirement is ensured.

It is understood that the foundation cylinder section 11 including the anchor plates 112 is not limited to one, and may be provided according to the number of the pre-stressing units 211 to be connected, for example, when the pre-stressing member 21 includes three pre-stressing units 211, the foundation cylinder section 11 including the anchor plates 112 may be provided in two such that every two adjacent pre-stressing units 211 are connected to the anchor plates 112 in the same foundation cylinder section 11. That is, the number of the basic cylinder segments 11 including the anchor plates 112 may be one less than the number of the pre-stressing units 211 included in the pre-stressing member 21, so as to satisfy the requirement of connecting more than two basic cylinder segments 11 as a whole.

Referring to fig. 9, it can be understood that the number of the anchor plates 112 in the same basic cylinder 11 is not limited to one, and two adjacent pre-stressing units 211 of the pre-stressing member 21 are not limited to be connected to the same anchor plate 112, and in some embodiments, two adjacent pre-stressing units 211 may be connected to two different anchor plates 112 in the same basic cylinder 11 as long as the requirement of the pre-stressing member 21 on the connection of each basic cylinder 11 can be satisfied.

It is understood that the above-mentioned connecting two adjacent prestressing units 211 of the prestressing member 21 to the same basic cylinder 11 to achieve the connection of the basic cylinder 11 into a whole by the prestressing member 21 is only an alternative embodiment, but is not limited to the above-mentioned way.

Referring to fig. 10, in some embodiments, the two or more pre-stressing units 211 of the pre-stressing element 21 may be formed such that the ends of two adjacent pre-stressing units 211 facing each other overlap each other in the height direction X to form an overlapping region M and are connected to different base cylinder sections 11. And the end of the pre-stressing unit 211 passes through one of the basic cylinder segments 11 and is connected to the side wall of the other basic cylinder segment 11 disposed adjacently. Through the arrangement, the integral connection requirement of the prestressed pieces 21 on each basic cylinder section 11 can be met.

For better understanding of the embodiment of the present invention, the base cylinder 11 includes four segments, and the prestressing unit 211 included in the prestressing member 21 includes two segments.

Illustratively, as shown in fig. 10, the prestressing member 21 may also be disposed inside the tower body 10, from bottom to top, such that one end of the first section of prestressing unit 211a is anchored at the bottom of the first base cylinder section 11a, and the other end of the first section of prestressing unit 211 passes through the first base cylinder section 11a, the second base cylinder section 11b and the third base cylinder section 11c in sequence and partially extends to the fourth base cylinder section 11d, so as to extend from the inner wall of the fourth base cylinder section 11d and be anchored at the inner wall of the fourth base cylinder section 11 d. And one end of the second pre-stressing unit 211b is anchored to the end of the fourth basic cylinder 11d away from the first basic cylinder 11a, and the other end of the second pre-stressing unit 211b passes through the fourth basic cylinder 11d and extends at least partially to the third basic cylinder 11c to protrude from the inside of the third basic cylinder 11c and is anchored to the inner wall of the third basic cylinder 11 c. The connecting requirements for the respective base cylinder sections 11 of the tower body 10 can also be met by arranging the two adjacent prestressing units 211 facing each other with their ends overlapping in the height direction X and connecting them to two different base cylinder sections 11.

Alternatively, two different base cylinder sections 11 connected to two adjacent prestressing units 211 of the prestressing member 21 may be stacked (or disposed adjacent to each other) in the height direction X.

Referring to fig. 11, as an alternative implementation manner, the tower provided in the above embodiment has a notch 113 formed on a side wall of the basic cylinder 11 connected to the pre-stressing unit 211, and the pre-stressing unit 211 is located inside one of the basic cylinder 11 and has an end portion extending into the notch 113 of the other basic cylinder 11 and connected to a surface surrounding the notch 113. The notch 113 can provide a contact plane for the end of the pre-stressing unit 211, thereby facilitating the anchoring of the pre-stressing unit 211.

Referring to fig. 12, as an alternative embodiment, it is only an alternative embodiment to facilitate the end anchoring of the pre-stressing unit 211 by providing the notch 113 on the inner wall of the base cylinder section 11, but not limited to the above. As shown in fig. 12, in some embodiments, at least part of the number of the base cylinder segments 11 may be provided with fixing protrusions 114 inside, and the pre-stressing unit 211 is at least partially located outside the base cylinder segments 11 and has an end passing through the fixing protrusions 114 and connected to the fixing protrusions 114. The requirements for the connection between the prestressing unit 211 and the base cylinder segment 11 can likewise be met.

It should be noted that the above-mentioned location outside the base cylinder section 11 means a distance from the cylinder wall of the base cylinder section 11 or the cylinder wall of the cylinder body 10.

As an alternative implementation, the tower 1 provided by each of the above embodiments of the present invention further includes an adapter cylinder section 12, the adapter cylinder section 12 is stacked on the base cylinder section 11 located at the outermost side in the height direction X, and the pre-stress unit 211 located near the adapter cylinder section 12 extends into the adapter cylinder section 12 and is connected to the adapter cylinder section 12. According to the embodiment of the invention, the adapter cylinder section 12 is arranged, so that the connection between the tower 1 and the engine room 3 and other parts is facilitated, and the connection requirement between the tower 1 and the engine room 3 is ensured.

As an alternative embodiment, the tensile strength of the pre-stressing unit 211 of the pre-stressing member 21 disposed near the adapter cylinder section 12 is smaller than that of the pre-stressing unit 211 disposed far from the adapter cylinder section 12, so as to better meet the bearing requirement of the tower 1.

Optionally, the base cylinder section 11 may be a concrete cylinder section, and the adapter cylinder section 12 may be a metal cylinder section, and may be a copper cylinder section, so that the whole tower 1 is a hybrid tower, which can meet the bearing requirement, ensure the connection requirement between the components such as the nacelle 3, and further reduce the cost of the tower 1.

As an optional embodiment, the tower 1 further includes a fixing assembly 30, the fixing assembly 30 includes two or more fixing rods 31 spaced apart in the circumferential direction Y of the tower body 10, and the fixing rods 31 penetrate through the adapter cylinder segment 12 and at least part of the foundation cylinder segment 11 and connect the adapter cylinder segment 12 with the foundation cylinder segment 11. Through setting up fixed rod 31, can further guarantee the joint strength between adapter cylinder section 12 and the basic cylinder section 11, and then guarantee the security performance of pylon 1.

Alternatively, the fixing rod 31 may be an anchor rod or a prestressed cable, the adapter cylinder section 12 may include a cylinder body 121 and a flange assembly 122 disposed at an end of the cylinder body 121, and the prestressed unit 211 disposed adjacent to the adapter cylinder section 12 may pass through the flange assembly 122 thereof and be anchored with the flange assembly 122. The flange assembly 122 may include only the inner flange 122a or the outer flange 122 b. At this time, the pre-stress unit 211 and the fixing bar 31 may be coupled to the inner flange 122a or the outer flange 122 b. Of course, in some embodiments, the flange assembly 122 may also include both the inner flange 122a and the outer flange 122b, such that one of the pre-stressing unit 211 and the fixing rod 31 is connected to the inner flange 122a and the other is connected to the outer flange 122b, as long as the connection requirement between the adapter cylinder 12 segment and the base cylinder segment 11 can be satisfied.

Optionally, the tower frame 1 provided by the embodiment of the present invention may be prefabricated or cast in place, as long as the forming requirement can be met.

Optionally, in the tower 1 provided in the embodiment of the present invention, the prestressed member 21 may be a prestressed cable or a prestressed rod, as long as the requirement on the connection strength between the foundation cylinder sections 11 and the adapter cylinder section 12 can be met, so as to reduce the overall cost requirement of the tower 1.

Therefore, the tower 1 provided by the embodiment of the present invention includes a tower body 10 and a connecting assembly 20, the tower body 10 includes more than two basic cylinder sections 11 arranged in a stacked manner, the connecting assembly 20 includes more than two prestressed pieces 21 arranged at intervals in the circumferential direction of the tower body 10, each prestressed piece 21 can extend in the height direction X of the tower body 10 and connect the more than two basic cylinder sections 11, so as to ensure the safety of the tower body 10. Because at least one prestressed part 21 comprises more than two prestressed units 211 distributed along the height direction X, the tensile strength of the more than two prestressed units 211 of the prestressed part 21 is reduced section by section, through the arrangement, the prestressed units 211 with the adaptive tensile strength can be selected according to the load requirements of different positions of the tower body 10, the strength requirement of the tower frame 1 can be ensured, meanwhile, all the prestressed units 211 without the prestressed part 21 can meet the tensile strength requirement of the highest position of the bearing requirement, on the basis of meeting the bearing requirement, the cost is lower, and the cost control of the wind generating set is facilitated.

On the other hand, the wind turbine generator system provided by the embodiment of the invention comprises the tower 1 provided by each embodiment, so that the cost of the tower 1 can be reduced on the basis of meeting the bearing requirements of the components such as the engine room 3, the generator 4, the impeller 5 and the like, and the wind turbine generator system has higher power generation benefit.

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. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A tower (1), characterized in that it comprises:

the tower comprises a tower body (10) and a tower body, wherein the tower body comprises more than two basic cylinder sections (11), and the more than two basic cylinder sections (11) are stacked along the height direction (X) of the tower body (10);

the connecting assembly (20) is arranged on the tower body (10), the connecting assembly (20) comprises more than two prestressed pieces (21) distributed at intervals, each prestressed piece (21) is connected to each basic cylinder section (11), at least one prestressed piece (21) comprises more than two prestressed units (211) distributed in the height direction (X) in sequence, and the tensile strength of the more than two prestressed units (211) of the prestressed piece (21) is reduced section by section.

2. A tower (1) according to claim 1, wherein the cross-sectional area of two or more segments (211) of said pre-stressing element (21) decreases segment by segment in said height direction (X).

3. The tower (1) according to claim 1, wherein each of said pre-stressed members (21) comprises more than two pre-stressed units (211) sequentially distributed in said height direction (X), and the number of the pre-stressed units (211) included in each of said pre-stressed members (21) is the same and is arranged in a one-to-one correspondence.

4. A tower (1) according to claim 1, characterized in that in said height direction (X) the sum of the lengths of two or more segments (211) of said pre-stressing element (21) is larger than the sum of two or more segments (11) of said foundation and that two adjacent segments (211) of said pre-stressing element (21) partly overlap in said height direction (X).

5. The tower (1) according to any of the claims 1 to 4, wherein of said more than two prestressing units (211) of said prestressing element (21), the ends of two adjacent prestressing units (211) facing each other are mutually overlapped in said height direction (X) and connected to the same foundation cylinder (11).

6. A tower (1) according to claim 5, wherein at least one of said basic cylinder segments (11) is provided with a groove (111) at each end in said height direction (X), and two adjacent segments of said pre-stressing units (211) of said pre-stressing member (21) are arranged such that one of said pre-stressing units (211) passes through said basic cylinder segment (11) and is fixed in said groove (111) at one end of said basic cylinder segment (11), and the other of said pre-stressing units (211) passes through the same basic cylinder segment (11) and is fixed in said groove (111) at the other end of said basic cylinder segment (11).

7. A tower (1) according to claim 5, characterised in that an anchor plate (112) is arranged inside at least one of said foundation cylinder sections (11), and that two adjacent segments (211) of said pre-stressing elements (21) are connected to said anchor plate (112) inside the same foundation cylinder section (11).

8. The tower (1) according to claim 7, wherein said anchor plate (112) inside said foundation tubular section (11) is one in number, and two adjacent prestressing units (211) of said prestressing member (21), one of said prestressing units (211) being connected to one end face of said anchor plate (112) in said height direction (X), the other of said prestressing units (211) being connected to the other end face of the same anchor plate (112) in said height direction (X);

or, the number of the anchor plates (112) inside the basic cylinder section (11) is two and the two anchor plates are arranged at intervals in the height direction (X), and one of the two adjacent prestress units (211) of the prestress member (21) is connected to one of the anchor plates (112), and the other prestress unit (211) is connected to the other anchor plate (112).

9. The tower (1) according to any of the claims 1 to 4, wherein of more than two segments of said pre-stressing units (211) of said pre-stressing element (21), the ends of two adjacent segments of said pre-stressing units (211) facing each other overlap each other in said height direction (X) and are connected to different said base cylinder segments (11), the end of each said pre-stressing unit (211) passing through one of said base cylinder segments (11) and being connected to the side wall of the other adjacently arranged base cylinder segment (11).

10. A tower (1) according to claim 9, wherein the side walls of said foundation shaft sections (11) connecting said pre-stressing units (211) are provided with notches (113), said pre-stressing units (211) being located inside one of said foundation shaft sections (11) and having ends extending into said notches (113) of another adjacently located foundation shaft section (11) and being connected to the surface enclosing said notches (113);

or, the inner wall of the basic cylinder section (11) is provided with a fixing protrusion (114), the prestress unit (211) is at least partially positioned outside the basic cylinder section (11), and the end part of the prestress unit penetrates through the fixing protrusion (114) and is connected to the fixing protrusion (114).

11. A tower (1) according to any of the claims 1 to 4, wherein said tower body (10) further comprises an adapter cylinder section (12), said adapter cylinder section (12) being stacked on said base cylinder section (11) located outermost in said height direction (X), said pre-stressing unit (211) located close to said adapter cylinder section (12) extending into said adapter cylinder section (12) and being connected to said adapter cylinder section (12).

12. A tower (1) according to claim 11, wherein said tower (1) further comprises a fixation assembly (30), said fixation assembly (30) comprising two or more fixation bars (31) spaced apart, said fixation bars (31) passing through said adapter cylinder section (12) and at least part of said foundation cylinder section (11) and connecting said adapter cylinder section (12) with said foundation cylinder section (11).

13. A wind park comprising a tower (1) according to any of claims 1 to 12.