CN113027691A - Tower drum foundation and wind generating set - Google Patents
Tower drum foundation and wind generating set Download PDFInfo
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- CN113027691A CN113027691A CN201911348108.9A CN201911348108A CN113027691A CN 113027691 A CN113027691 A CN 113027691A CN 201911348108 A CN201911348108 A CN 201911348108A CN 113027691 A CN113027691 A CN 113027691A
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- anchor plate
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- foundation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/22—Foundations specially adapted for wind motors
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
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- Sustainable Energy (AREA)
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to a tower drum foundation and a wind generating set, wherein the tower drum foundation comprises: a base body having a mounting surface and a support surface which are arranged to face each other in a height direction of the base body; the anchor cable assembly comprises a first anchor plate and a plurality of anchor cables, wherein the first anchor plate is abutted against the mounting surface, and each anchor cable part is located in the basic main body, the anchor cables are sequentially arranged along the circumferential direction of the first anchor plate, the anchor cables are formed by bending prestressed ribs and are provided with two free ends, and at least one free end of each anchor cable penetrates through the first anchor plate and is used for being connected with the tower barrel. The tower barrel foundation and the wind generating set provided by the embodiment of the invention can meet the use requirement of the wind generating set, and are low in cost and easy to control the tension stress.
Description
Technical Field
The invention relates to the technical field of wind power, in particular to a tower foundation and a wind generating set.
Background
The tower base of the wind generating set is used for mounting and supporting the tower of the wind generating set, and various loads generated in the operation process of the wind generating set are balanced, so that the safe and stable operation of the set is ensured. The anchor bolt type tower drum is widely applied due to high basic strength and good stress performance.
However, most of the anchor bolt type tower bases in the prior art adopt an anchor cage structure made of anchor bolts, and although the foundation of the wind generating set can meet the use requirements of the tower, the foundation also has corresponding disadvantages, and mainly lies in that the existing anchor bolt base is high in cost and easy to lose prestress.
Therefore, a new tower foundation and a wind turbine generator set are needed.
Disclosure of Invention
The embodiment of the invention provides a tower drum foundation and a wind generating set, which can meet the use requirement of the wind generating set, are low in cost and are not easy to lose prestress.
In one aspect, an embodiment of the present invention provides a tower foundation, including: a base body having a mounting surface and a support surface which are arranged to face each other in a height direction of the base body; the anchor cable assembly comprises a first anchor plate and a plurality of anchor cables, wherein the first anchor plate is abutted against the mounting surface, and each anchor cable part is located in the basic main body, the anchor cables are sequentially arranged along the circumferential direction of the first anchor plate, the anchor cables are formed by bending prestressed ribs and are provided with two free ends, and at least one free end of each anchor cable penetrates through the first anchor plate and is used for being connected with the tower barrel.
According to an aspect of the embodiment of the present invention, the anchor cable includes two or more extension sections extending in the height direction, and a transition section connected between two adjacent extension sections, and the transition section is arc-shaped.
According to an aspect of an embodiment of the present invention, the tower foundation further includes a shape-matching member at least partially shaped to match the shape of the transition section and disposed between the transition section and the concrete foundation.
According to one aspect of the embodiment of the invention, each transition section is internally provided with a shaping component correspondingly; or the shaping component extends along the circumferential direction and is matched with the transition sections of more than two anchor cables.
According to one aspect of an embodiment of the present invention, the shaping member is tubular and extends a predetermined distance in a circumferential direction; or the shaping component is arc-shaped and extends for a preset distance along the circumferential direction, and the shaping component is provided with a concave part.
According to an aspect of an embodiment of the present invention, the anchor line assembly further comprises a second anchor plate spaced apart from and disposed opposite the first anchor plate in the elevation direction, the second anchor plate abutting the support surface, each of the anchor lines passing at least partially through the second anchor plate.
According to one aspect of the embodiment of the invention, the transition sections and the extension sections of each anchor cable are alternately arranged, and the number of the transition sections is even; and one free end of the two free ends of each anchor cable penetrates through the first anchor plate and is used for being connected with the tower, and the other free end of the two free ends penetrates through the second anchor plate and is connected to the second anchor plate.
According to an aspect of the embodiment of the invention, the transition sections and the extension sections of each anchor cable are alternately arranged, the number of the transition sections is odd, and both free ends of each anchor cable penetrate through the first anchor plate and are used for being connected with the tower.
According to one aspect of the embodiment of the invention, the number of the transition sections is one section, and the anchor cable is integrally U-shaped; or the number of the transition sections is three, and the anchor cable is integrally W-shaped.
According to an aspect of the embodiment of the present invention, the first anchor plate is annular and has two or more sets of holes spaced apart in a radial direction of the first anchor plate, each set of holes includes a plurality of through holes spaced apart in a circumferential direction, centers of the through holes of each set of holes are located on a same reference circle, and each free end of the anchor cable passes through one of the through holes in a height direction.
According to one aspect of an embodiment of the invention, one of the free ends of the cable bolt passes through one of the through holes of one of the sets of holes and the other of the free ends of the cable bolt passes through one of the through holes of the other set of holes; and/or two free ends of the anchor cable respectively penetrate through the through holes of the same group of hole groups.
In another aspect, a wind turbine generator system according to an embodiment of the present invention includes: the tower barrel comprises a barrel body and an end flange connected to the barrel body, wherein the end flange is provided with a plurality of flange holes; in the tower cylinder foundation, the end flange is stacked with the first anchor plate in the height direction, and the free end of each anchor cable penetrates through the flange hole and is connected with the end flange through the anchoring piece.
According to the tower base and the wind generating set provided by the embodiment of the invention, the tower base comprises a base main body and the anchor cable assembly, the base main body is provided with the installation surface and the supporting surface which are oppositely arranged in the height direction of the base main body, the anchor cable assembly comprises the first anchor plate and the plurality of anchor cables, the first anchor plate is abutted against the installation surface, each anchor cable part is positioned in the base main body, the plurality of anchor cables are sequentially arranged along the circumferential direction of the first anchor plate, and each anchor cable is formed by bending the prestressed tendons, and the anchor cables are in the form of the prestressed tendons, so that the cost is lower. Meanwhile, the limited anchor cable is formed by bending the prestressed tendons, the length of a single anchor cable can be increased, the prestress is not easy to lose, and meanwhile the tension stress can be better controlled.
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 view of a wind turbine foundation and a tower of an embodiment of the present invention;
FIG. 3 is a schematic view of a combination anchor cable assembly and tower of an embodiment of the present invention;
fig. 4 is a schematic view of a connection of a cable bolt according to an embodiment of the present invention to a first anchor plate;
fig. 5 is a schematic view of an alternative connection of the anchor line of the embodiment of the present invention to the first anchor plate;
fig. 6 is a schematic view of another connection of a cable bolt according to an embodiment of the present invention to a first anchor plate;
fig. 7 is a schematic view of another connection of a cable bolt according to an embodiment of the present invention to a first anchor plate;
FIG. 8 is a partial structural schematic view of a tower foundation according to another embodiment of the present invention;
FIG. 9 is a partial structural schematic view of a tower foundation according to yet another embodiment of the present invention;
fig. 10 is a schematic view of a cable bolt according to another embodiment of the present invention;
FIG. 11 is a partial structural schematic view of a tower foundation according to yet another embodiment of the present invention;
FIG. 12 is a partial structural schematic view of a tower foundation according to yet another embodiment of the present invention.
Wherein:
100-tower base;
10-a basic body; 10 a-a body portion; 10 b-side enclosure; 11-a support surface; 12-a mounting surface;
20-an anchor cable assembly; 21-a first anchor plate; 211-group of holes; 211 a-through holes; 22-anchor cable; 22 a-free end; 221-an extension section; 222-a transition section; 23-a second anchor plate;
30-a shaping component;
40-an anchor member;
200-tower drum; 210-a cartridge body; 220-end flange;
x-height direction; y-circumferential direction; z-radial;
300-a nacelle; 400-a generator; 500-an impeller; 510-a hub; 520-blade.
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 as they are used in the drawings and is not intended to limit the tower foundation 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 present invention, a tower foundation and a wind turbine generator set according to an embodiment of the present invention will be described in detail below with reference to fig. 1 to 12.
Referring to fig. 1 and fig. 2, an embodiment of the invention provides a wind turbine generator system, which includes a tower base 100, a tower 200, a nacelle 300, a generator 400, and an impeller 500. Tower 200 includes a barrel body 210 and an end flange 220 coupled to barrel body 210, end flange 220 having a plurality of flange apertures for coupling with tower foundation 100. The nacelle 300 is disposed at the top end of the tower 200, and the generator 400 is disposed at the nacelle 300, and may be located inside the nacelle 300 or outside the nacelle 300. The impeller 500 includes a hub 510 and a plurality of blades 520 connected to the hub 510, and the impeller 500 is connected to a rotating shaft of the generator 400 through the hub 510 thereof. When wind acts on the blades 520, the entire impeller 500 and the rotating shaft of the generator 400 are rotated, so that wind energy is converted into electric energy.
Referring to fig. 2 and fig. 3 together, in order to optimize the performance of the tower foundation 100 and better satisfy the stability of the wind turbine generator system, as an alternative embodiment, the embodiment of the invention further provides a novel tower foundation 100, where the tower foundation 100 includes a foundation main body 10 and anchor cable assemblies 20, and the foundation main body 10 has a mounting surface 12 and a supporting surface 11 arranged oppositely in the height direction X of the foundation main body 10. The anchor cable assembly 20 includes a first anchor plate 21 and a plurality of anchor cables 22, the first anchor plate 21 abuts against the mounting surface 12, and each anchor cable 22 is partially located in the foundation main body 10, the plurality of anchor cables 22 are sequentially arranged along the circumferential direction Y of the first anchor plate 21, the anchor cables 22 are formed by bending prestressed tendons and have two free ends 22a, and at least one free end 22a of each anchor cable 22 penetrates through the first anchor plate 21 and is used for being connected with the tower 200.
When the tower foundation 100 provided by the embodiment of the invention is applied to the wind turbine generator set, the end flange 220 of the tower 200 and the first anchor plate 21 are stacked in the height direction X of the foundation main body 10, and each anchor cable 22 passes through the free end 22a of the first anchor plate 21, further passes through one of the flange holes and is connected with the end flange 220 through the anchor 40, so that the connection between the tower foundation 100 and the tower 200 is realized. The tower base 100 can meet the use requirements of the wind generating set, and is low in cost and not prone to loss of prestress.
In alternative embodiments, the foundation body 10 may be a one-piece structure cast from concrete or concrete-containing compositions. Alternatively, the base body 10 may include a middle body portion 10a and a side enclosure 10b disposed around the middle body portion 10a along the circumferential direction Y, the middle body portion 10a has a height higher than that of the side enclosure 10b, an end surface of the main body portion 10a away from the side enclosure 10b forms a mounting surface 12 of the base body 10, and a bottom surface of the side enclosure 10b and a bottom surface of the main body portion 10a are flush and jointly form a support surface 11 of the base body 10. Meanwhile, the periphery of the side enclosure 10b is provided with a downward slope. By adopting the above form for the foundation main body 10, the overall stability of the tower foundation 100 can be improved.
In some alternative embodiments, the first anchor plate 21 included in the cable bolt assembly 20 may be in the shape of a ring, specifically, a circular ring or a polygonal ring, and when the first anchor plate is in the shape of a polygonal ring, a regular polygonal ring is preferred. And the circumferential direction Y and the radial direction Z of the first anchor plate 21 mentioned above and below when it is a polygonal ring shape are the circumferential direction and the radial direction of the circumscribed or inscribed circle of the first anchor plate 21. In particular, the first anchor plate 21 may abut against the mounting surface 12 of the foundation main body 10, and in some alternative embodiments, the first anchor plate 21 may be disposed coaxially with the foundation main body 10, so as to ensure the uniformity of the force applied to the tower foundation 100 after the tower foundation 100 is connected to the tower 200.
Optionally, the number of the anchor cables 22 included in the anchor cable assembly 20 is not limited to a specific numerical value, and may be set according to parameters such as the size of the tower foundation 100, the model of the wind turbine generator system, and the size of the tower 200, as long as the requirement of the connection strength between the anchor cable assembly and the tower 200 can be met. Optionally, a plurality of anchor cables 22 may be arranged at intervals and uniformly in the circumferential direction Y of the first anchor plate 21, so as to better ensure the uniformity of the stress on the tower 200 and the tower foundation 100, and improve the safety level of the wind turbine generator system.
As an alternative embodiment, the anchor cable 22 provided in the embodiment of the present invention may include, but is not limited to, single or bundled prestressed wires, prestressed steel strands, and other materials with high strength and good toughness.
Optionally, the anchor cables 22 used in the tower foundation 100 provided in the embodiment of the present invention may have a plurality of bending manners, and as an alternative implementation manner, the anchor cables 22 may include more than two extension sections 221 respectively extending along the height direction X of the foundation main body 10 and a transition section 222 connected between two adjacent extension sections 221, where the transition section 222 is arc-shaped. Through the arrangement, on the basis of increasing the length of a single anchor cable 22, two adjacent extension sections 221 can be in smooth transition, so that the force transmission requirement is better guaranteed, and the performance of the tower drum foundation 100 is optimized.
As an alternative embodiment, the transition sections 222 and the extension sections 221 of each anchor line 22 may be arranged alternately, the number of the transition sections 222 is odd, and both free ends 22a of each anchor line 22 penetrate through the first anchor plate 21 and are used for connecting with the tower 200. Through the arrangement, the length of a single anchor cable 22 can be increased, and the prestress is not easy to lose. Meanwhile, since the two free ends 22a of the anchor cable 22 are both passed through the first anchor plate 21 and used for being connected with the tower tube 200, the usage amount of the anchor can be reduced, the cost can be reduced, and the construction amount can be reduced.
Furthermore, because two free ends 22a of the anchor cable 22 extend out of the first anchor plate 21, when the anchor cable 22 is damaged, the anchor cable 22 can be replaced easily, the construction amount and the replacement difficulty during replacement are reduced, the service life of the tower base 100 is prolonged, and the safety performance of the wind generating set is ensured.
Referring to fig. 4 to 7, in some alternative embodiments, the first anchor plate 21 has more than two sets of hole sets 211 spaced along the radial direction Z of the first anchor plate 21, each set of hole sets 211 includes a plurality of through holes 211a spaced along the circumferential direction Y, and the centers of the through holes 211a of each set of hole sets 211 are located on the same reference circle. In the height direction X, each free end 22a of the anchor line 22 passes through one of the through holes 211a, respectively. Through the arrangement, the free end 22a of the anchor cable 22 can be ensured to smoothly pass through the first anchor plate 21, and meanwhile, the free end 22a of the anchor cable 22 can be enabled to pass through the through hole 211a on the corresponding reference circle according to the connection requirement of the end flange 220 of the tower barrel 200.
As shown in fig. 4, optionally, when both free ends 22a of the anchor lines 22 pass through the first anchor plate 21, one of the free ends 22a of at least one anchor line 22 of the plurality of anchor lines 22 passes through one of the through holes 211a of one of the hole groups 211, and the other free end 22a of the anchor line 22 passes through one of the through holes 211a of the other hole group 211. Optionally, the two free ends 22a of the anchor cable 22 may be arranged in the radial direction Z of the first anchor plate 21, and through the arrangement, on the basis that the length requirement of the single anchor cable 22 is increased by bending the anchor cable 22, the connection requirement between the anchor cable 22 and the first anchor plate 21 can be better met. The span of the anchor cable 22 is made smaller, which is suitable for installation of the anchor cable 22 with less bending times.
As shown in fig. 5, of course, when both free ends 22a of the anchor cable 22 pass through the first anchor plate 21 and one free end 22a of the anchor cable 22 passes through one through hole 211a of one of the hole sets 211 and the other free end 22a of the anchor cable 22 passes through one through hole 211a of the other hole set 211, the two free ends 22a of the anchor cable 22 are not limited to be arranged oppositely in the radial direction Z of the anchor cable 22, and in some other examples, the connection mode shown in fig. 5, that is, the two free ends 22a of the anchor cable 22 are arranged staggeredly in the radial direction Z, can also meet the connection requirement between the anchor cable 22 and the first anchor plate 21.
It will be appreciated that when both free ends 22a of the anchor line 22 pass through the first anchor plate 21, the two free ends 22a of the anchor line 22 are not limited to pass through the through holes 211a on two different reference circles, and in some other examples, as shown in fig. 6, the two free ends 22a of the anchor line 22 may be passed through by two different through holes 211a of the same hole group 211, that is, the through holes 211a through which the two free ends 22a of the anchor line 22 pass may be located on the same reference circle, and may also meet the requirement of connection between the anchor line 22 and the first anchor plate 21.
Alternatively, when the two free ends 22a of the anchor cable 22 are penetrated through by the through holes 211a corresponding to the same hole group 211, the through holes 211a of the two free ends 22a of the anchor cable 22 may be arranged in succession in the circumferential direction Y as shown in fig. 6, which is, of course, an arrangement manner, but is not limited to this form. As shown in fig. 7, when the two free ends 22a of the anchor cable 22 pass through the through holes 211a corresponding to the same hole group 211, more than one through hole 211a may be spaced between the through holes 211a where the two free ends 22a of the anchor cable 22 are respectively located, and the connection requirement between the anchor cable 22 and the first anchor plate 21 may be satisfied.
In specific implementation, in the plurality of anchor lines 22 included in the anchor line assembly 20, the connection manner between the two free ends 22a of each anchor line 22 and the first anchor plate 21 may adopt any structure form shown in fig. 4 to 7, and the connection manner between the two free ends 22a of the plurality of anchor lines 22 and the first anchor plate 21 may be the same or different, and may specifically be selected according to the bending times of the anchor lines 22, the span in the radial direction Z of the first anchor plate 21, and other conditions.
As an alternative embodiment, when the number of the transition sections 222 is odd, for better understanding of the tower foundation 100 provided by the present invention, it will be exemplified that the number of the transition sections 222 may be one, and in this case, the anchor cable 22 may be in a "U" shape as a whole.
Referring also to FIG. 8, in alternative embodiments, the tower foundation 100 provided in the above embodiments further includes a sizing component 30, wherein the sizing component 30 is at least partially shaped to match the shape of the transition piece 222 and is disposed between the transition piece 222 and the foundation main body 10. Because the transition section 222 is arranged, two adjacent extension sections 221 can be smoothly transited, the stress requirement of the anchor cable 22 is ensured, and the shaping component 30 is arranged and the position relation between the shaping component and the transition section 222 and between the shaping component and the foundation main body 10 is limited, so that the transition section 222 can be supported and shaped, the transition section 222 is prevented from being deformed under the action of external force, and the stress requirement of the tower foundation 100 is further ensured. Through the arrangement, the contact area of the anchor cable 22 relative to the base main body 10 can be increased, and the force transmission requirement can be better met.
As an alternative embodiment, one setting member 30 may be provided in each transition section 222, that is, one setting member 30 may be provided in each transition section 222. Of course, in some other examples, the shaping member 30 may be extended along the circumferential direction Y and cooperate with the transition sections 222 of two or more anchor cables 22, that is, the shaping member 30 with a predetermined length may be used together with a plurality of transition sections 222, as long as the shaping effect on the transition sections 222 can be satisfied, and the smooth transition between two adjacent extension sections 221 can be ensured.
As an alternative embodiment, the shaping member 30 may be a steel structure, but of course, a steel-filled concrete may also be used.
With continued reference to FIG. 8, in alternative embodiments of the tower foundation 100 provided in the above embodiments, the fixing member 30 may be tubular and extend a predetermined distance along the circumferential direction Y of the first anchor plate 21. When the shaping member 30 is positioned below the first anchor plate 21, at least a portion of the base body 10 fills the internal cavity of the shaping member 30. Through the arrangement, the shaping component 30 is simple in structure, easy to machine and manufacture and position between the shaping component and the first anchor plate 21, and meanwhile, the force borne by the anchor cable 22 can be transmitted to the foundation main body 10 through the shaping component 30, so that the bearing capacity of the tower foundation 100 is better guaranteed.
Referring to fig. 9, it is understood that the above-mentioned structure of the shaping member 30 is only an alternative embodiment, and in some other embodiments, the shaping member 30 may also be an arc-shaped sheet and extend along the circumferential direction Y for a predetermined distance, the section of the shaping member 30 in the radial direction Z of the first anchor plate 21 may be a semicircular ring or an arc-shaped segment, and the shaping member 30 has a concave portion. When the shaping member 30 is positioned below the first anchor plate 21, at least a portion of the base body 10 is filled in the concave portion. Through the above arrangement, the setting effect and force transmission requirements for the transition section 222 can be satisfied.
Referring also to fig. 10, it is understood that the above embodiments are illustrated with an odd number of transition sections 222 of the anchor line 22 and one number of transition sections 222, which is an alternative embodiment, but not limited to the above embodiments, and in some other embodiments, the number of transition sections 222 may be three, and the anchor line 22 is "W" shaped as a whole, which can also meet the use requirement of the tower foundation 100. Of course, the number of the transition sections 222 may also be five, seven or even more, and is not described in detail herein.
Referring to fig. 11, as an alternative embodiment, the anchor cable assembly 20 according to the above embodiments of the present invention may further include a second anchor plate 23 disposed opposite and spaced from the first anchor plate 21 in the height direction X of the base body 10, wherein the second anchor plate 23 abuts against the supporting surface 11, and each anchor cable 22 at least partially penetrates through the second anchor plate 23. By providing the second anchor plate 23, the anchor line 22 can be supported by the second anchor plate 23 when the anchor line 22 is formed.
Moreover, when the tower foundation 100 includes the shaping component 30 and the shaping component 30 is in the shape of an arc sheet, the shaping component 30 may be connected to the surface of the second anchor plate 23 away from the first anchor plate 21, and by the above arrangement, the fixation of the second anchor plate 23 to the anchor cable 22 may be facilitated.
Optionally, a cavity may be formed between the concave portion of the shaping component 30 and the second anchor plate 23, and at least a portion of the foundation main body 10 is filled in the cavity, and through the above arrangement, the stress of the anchor cable 22 can be transmitted to the second anchor plate 23 through the shaping component 30, and then transmitted to the foundation main body 10 through the second anchor plate 23, so that the transmission requirement of the force is optimized, and the bearing capacity of the tower foundation 100 is improved.
Referring also to FIG. 12, the tower foundation 100 according to the above embodiments of the present invention is illustrated by the anchor lines 22 including an odd number of transition sections 222, and in some other examples, the anchor lines 22 may include an even number of transition sections 222, wherein one of the two free ends 22a of each anchor line 22 passes through the first anchor plate 21 and is used for connecting with the tower 200, and the other free end 22a passes through the second anchor plate 23 and is connected to the second anchor plate 23. The connection requirements of the cable bolts 22 can also be met, increasing the length of a single cable bolt 22 while ensuring the force transfer requirements of the cable bolt 22. In specific implementation, the number of the transition sections 222 may be two, and at this time, the anchor cable 22 is integrally in an "N" shape as shown in fig. 12, of course, the number of the transition sections 222 is not limited to two, and may also be four, six, or even more, and may be specifically set according to parameters such as the span of the anchor cable 22, the force transmission requirement, and the like, which is not described herein again.
In summary, according to the tower base 100 provided by the embodiment of the present invention, each anchor cable 22 is formed by bending a prestressed tendon, and the anchor cable 22 is in the form of a prestressed tendon, so that the overall cost of the tower base 100 is lower and the construction is easy on the basis of meeting the bearing capacity of the tower base 100. Meanwhile, the limited anchor cable 22 is formed by bending the prestressed tendons, the length of a single anchor cable 22 can be increased, the prestress is not easy to lose, and meanwhile the tension stress can be better controlled. Meanwhile, the anchor cable 22 in the form is easy to replace and maintain, and has better effects in the aspects of production, inspection, transportation, operation and maintenance and the like compared with an anchor bolt tower barrel.
The wind generating set provided by the embodiment of the invention also has lower cost because the wind generating set comprises the tower drum foundation 100 provided by each embodiment, and the tower drum foundation 100 and the tower drum 200 are reliably connected, are easy to construct, have higher safety level and are easy to popularize and use.
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 (12)
1. A tower foundation (100), comprising:
a base body (10) having a mounting surface (12) and a support surface (11) that are arranged to face each other in a height direction (X);
the anchor cable assembly (20) comprises a first anchor plate (21) and a plurality of anchor cables (22), wherein the first anchor plate (21) abuts against the mounting surface (12), part of each anchor cable (22) is located in the base main body (10), the anchor cables (22) are sequentially arranged along the circumferential direction (Y) of the first anchor plate (21), the anchor cables (22) are formed by bending prestressed tendons and are provided with two free ends (22a), and at least one free end (22a) of each anchor cable (22) penetrates through the first anchor plate (21) and is used for being connected with the tower drum (200).
2. The tower foundation (100) of claim 1, wherein the anchor cable (22) comprises two or more extension segments (221) extending in the height direction (X) and a transition segment (222) connected between two adjacent extension segments (221), wherein the transition segment (222) is arc-shaped.
3. The tower foundation (100) of claim 2, further comprising a sizing component (30), the sizing component (30) being at least partially shaped to match the shape of the transition piece (222) and to be disposed between the transition piece (222) and the concrete foundation.
4. The tower foundation (100) of claim 3, wherein one of said sizing elements (30) is disposed within each of said transition sections (222); alternatively, the shaping member (30) extends in the circumferential direction (Y) and cooperates with the transition sections (222) of two or more anchor lines (22).
5. The tower foundation (100) of claim 3, wherein said shaped element (30) is tubular and extends a predetermined distance in the circumferential direction (Y);
or, the shaping component (30) is arc-shaped and extends for a preset distance along the circumferential direction (Y), and the shaping component (30) is provided with a concave part.
6. The tower foundation (100) of claim 2, wherein said anchor line assembly (20) further comprises a second anchor plate (23) spaced from and disposed opposite said first anchor plate (21) in said height direction (X), said second anchor plate (23) abutting said supporting surface (11), each of said anchor lines (22) passing at least partially through said second anchor plate (23).
7. The tower foundation (100) of claim 6, wherein said transition sections (222) of each anchor line (22) alternate with said extension sections (221), the number of said transition sections (222) being even;
one of the two free ends (22a) of each anchor line (22) passes through the first anchor plate (21) and is adapted to be connected to the tower (200), and the other free end (22a) passes through the second anchor plate (23) and is adapted to be connected to the second anchor plate (23).
8. The tower foundation (100) of claim 2, wherein said transition sections (222) alternate with said extension sections (221) of each anchor line (22), said transition sections (222) being odd in number, both said free ends (22a) of each anchor line (22) passing through said first anchor plate (21) and being adapted to be connected to said tower (200).
9. The tower foundation (100) of claim 8, wherein said transition sections (222) are one-piece, and said anchor lines (22) are generally "U" -shaped;
or the number of the transition sections is three, and the anchor cable (22) is W-shaped as a whole.
10. The tower foundation (100) of claim 8, wherein the first anchor plate (21) is ring-shaped and has two or more sets of holes (211) spaced apart in a radial direction (Z) of the first anchor plate (21), each set of holes (211) includes a plurality of through holes (211a) spaced apart in the circumferential direction (Y), centers of the through holes (211a) of each set of holes (211) are located on a same reference circle, and each free end (22a) of the anchor cable (22) passes through one of the through holes (211a) in the height direction (X).
11. The tower foundation (100) of claim 10, wherein one of said free ends (22a) of said anchor lines (22) passes through one of said through holes (211a) of one of said sets of holes (211) and the other of said free ends (22a) of said anchor lines (22) passes through one of said through holes (211a) of the other set of holes (211); and/or the two free ends (22a) of the anchor cable (22) respectively pass through the through holes (211a) of the same group of hole groups (211).
12. A wind turbine generator set, comprising:
the tower drum (200) comprises a drum body (210) and an end flange (220) connected to the drum body (210), wherein the end flange (220) is provided with a plurality of flange holes;
the tower foundation (100) of any one of claims 1 to 11, said end flange (220) being arranged one above the other in the height direction (X) with said first anchor plate (21), said free end (22a) of each anchor cable (22) passing through said flange hole and being connected to said end flange (220) by means of an anchor.
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| CN201911348108.9A CN113027691B (en) | 2019-12-24 | 2019-12-24 | Tower drum foundation and wind generating set |
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