Novel full-truss type wind power tower structure

Abstract

The utility model relates to a novel full-truss type wind power tower structure, and belongs to the technical field of wind power towers. Comprising a constant-section type truss structure upper part and a gradually-changed-section type truss structure lower part, the constant-section type truss structure upper part and the gradually-changed-section type truss structure lower part are composed of a plurality of sections, the sections are of a rod piece assembly type structure, the section of the constant-section type truss structure upper part is a standard section, and the section of the constant-section type truss structure lower part is a standard section. The section on the lower portion of the gradual change section type truss structure is a gradual change section, the section is composed of steel pipe main chords, transverse web members and diagonal web members, and prestressed steel strands are additionally arranged in the main chords. The utility model has the beneficial effects that by adopting the structural form, the problem of a supporting structure of a wind turbine generator set with the ultrahigh height of more than 160m can be solved, the structural form of combining a gradual change section and a constant section is adopted, the whole structure adopts a rod piece assembly type, and the prestressed steel strands are additionally arranged in the main chord; the utility model has the advantages of light dead weight, high rigidity, low cost, convenience in assembly, disassembly and transportation, and prolonged service life of the whole machine.

Description

Technical Field

[0001] This utility model relates to a novel all-truss wind turbine tower structure, belonging to the field of wind turbine tower technology. Background Technology

[0002] In recent years, my country's wind energy development has accelerated significantly. The continuous increase in single-unit capacity, hub height, and blade length has reduced the levelized cost of electricity (LCOE) over the entire lifecycle of wind power, but it has also placed higher demands on the mechanical performance of the wind turbine support structure. The support structure is a crucial component ensuring the safe operation of wind turbine units. With the obvious trend towards larger wind turbines, truss-type towers have emerged and gained market acceptance due to factors such as overall lightweighting and cost reduction. Currently, most truss towers on the market are composite truss towers, meaning the lower part of the wind turbine tower is a truss-type tower, while the upper part is a steel tower tube. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a novel full-truss wind turbine tower structure, with a variable cross-section truss structure at the bottom and a constant cross-section truss structure at the top. The two parts are connected by bolts or rivets to achieve a smooth transition of the connecting cross-section, thereby meeting the operating conditions of ultra-high-altitude wind turbine units.

[0004] This utility model is achieved through the following technical solution: a novel full-truss wind turbine tower structure, comprising a constant cross-section truss structure upper part and a gradually changing cross-section truss structure lower part. The constant cross-section truss structure upper part and the gradually changing cross-section truss structure lower part are composed of multiple segments. The segments adopt a rod-plate assembly structure. The segments of the constant cross-section truss structure upper part are standard segments, and the segments of the gradually changing cross-section truss structure lower part are gradually changing segments. The segments are composed of steel pipe main chords, horizontal web members and diagonal web members. Prestressed steel strands are added inside the main chord.

[0005] The transition segment consists of a steel pipe main chord I, a transverse web member I, and an oblique web member I. The steel pipe main chord I has node plates welded at the upper and lower connections between segments. The node plates are provided with bolt connection holes. The steel pipe main chord I is connected to the oblique web member I through a connecting plate I and bolts. The connecting plate I adopts a symmetrical straight-insertion connection on both sides, with one end extending into the inside of the oblique web member I. The main chord of the oblique web member I is a square tube, and the other end extends into the node plate of the main chord. Both ends are assembled and connected by bolts.

[0006] The horizontal web member I and the diagonal web member I are connected by bolts. The diagonal web member I is divided into an upper diagonal web member and a lower diagonal web member. The horizontal web member I is a single square tube. The upper diagonal web member, the lower diagonal web member, and the horizontal web member I are connected by bolts through a connecting plate II. The connecting plate II is placed on the outside of the square tube and consists of two connecting plates.

[0007] The prestressed steel strands are installed inside the main chord I of the steel pipe, with steel strand anchor plates and steel strand positioning grooves at both ends. The steel strands pass through the steel strand positioning grooves and extend from the bottom to the top of the main chord of the truss tower.

[0008] The steel strands consist of 8 bundles.

[0009] The standard segment is composed of a steel pipe main chord II, a horizontal web member II, and a diagonal web member II, and the cross-sectional dimensions of each standard segment are consistent.

[0010] The main chords of the steel pipes in the upper part of the constant cross-section truss structure and the lower part of the gradually changing cross-section truss structure are steel pipes with diameters ranging from 0.8 to 1.2 m.

[0011] The horizontal and diagonal web members are square tubes.

[0012] The beneficial effects of this utility model are: by adopting this structural form, the support structure problem of wind turbine units with an ultra-high height of 160m and above can be solved. The structure form combines the gradually changing cross section and the constant cross section. The overall structure adopts the rod and piece assembly type. The prestressed steel strands are added inside the main chord. It has the advantages of light weight, high rigidity, low cost, convenient installation, dismantling and transportation, and improved service life of the whole machine. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the lower structure of the gradient cross-section truss structure of this utility model;

[0016] Figure 3 This is a structural schematic diagram of the lower segment of the gradient cross-section truss structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the segmental main chord structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the connection structure between the main chord and the web member of the lower segment of this utility model;

[0019] Figure 6 This is a schematic diagram of the connection structure of the middle web member of the lower segment of this utility model;

[0020] Figure 7 This is a schematic diagram of the upper part of the constant cross-section truss structure of this utility model;

[0021] Figure 8 This is a schematic diagram of the upper segment of this utility model;

[0022] Figure 9 This is a schematic diagram of the prestressed steel strand inside the main chord of the steel pipe of this utility model.

[0023] In the diagram: 1. Upper part of the constant cross-section truss structure; 2. Lower part of the gradually changing cross-section truss structure; 3. Prestressed steel strands; 11. Standard segment; 21. Gradual changing segment; 211. Steel pipe main chord I; 212. Horizontal web member I; 213. Diagonal web member I; 214. Connecting plate I; 215. Connecting plate II; 2111. Node plate; 2112. Steel strand anchor plate; 2113. Steel strand positioning groove; 2131. Upper diagonal web member; 2132. Lower diagonal web member; 111. Steel pipe main chord II; 112. Horizontal web member II; 113. Diagonal web member II. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] like Figures 1 to 9The diagram shows a novel all-truss wind turbine tower structure, comprising a constant cross-section truss upper part 1 and a gradually changing cross-section truss lower part 2. Both the constant cross-section truss upper part 1 and the gradually changing cross-section truss lower part 2 are composed of multiple segments. The segments are assembled using a rod-plate assembly structure. The segments of the constant cross-section truss upper part 1 are standard segments 11, and the segments of the gradually changing cross-section truss lower part 2 are gradually changing segments 21. Each segment consists of a steel pipe main chord, horizontal web members, and diagonal web members. Prestressed steel strands 3 are added inside the main chord.

[0027] The transition segment 21 is composed of a steel pipe main chord I 211, a horizontal web member I 212, and a diagonal web member I 213. The steel pipe main chord I 211 is reinforced with node plates 2111 at the upper and lower connections between segments. The node plates 2111 are provided with bolt connection holes. The steel pipe main chord I 211 is connected to the diagonal web member I 213 through a connecting plate I 214 and bolts. The connecting plate I 214 adopts a symmetrical straight-insertion connection on both sides, with one end extending into the inside of the diagonal web member I 213. The main chord of the diagonal web member I 213 is a square tube, and the other end extends into the node plate 2111 of the main chord. Both ends are assembled and connected by bolts.

[0028] The horizontal web member I 212 and the diagonal web member I 213 are connected by bolts. The diagonal web member I 213 is divided into an upper diagonal web member 2131 and a lower diagonal web member 2132. The horizontal web member I 212 is a single square tube. The upper diagonal web member 2131, the lower diagonal web member 2132 and the horizontal web member I 212 are connected by bolts through a connecting plate II 215. The connecting plate II 215 is placed on the outside of the square tube and consists of two connecting plates.

[0029] The prestressed steel strand 3 is installed inside the main chord of the steel pipe I211, with steel strand anchor plates 2112 and steel strand positioning grooves 2113 at both ends. The steel strand 3 passes through the steel strand positioning grooves 2113 and extends from the bottom to the top of the main chord of the truss tower. The installation of the prestressed steel strand 3 ensures that most of the stress on the main chord is concentrated in the compressive state, thereby reducing the stress level of the flange connection bolts and improving the fatigue service life of the bolts.

[0030] The steel strand 3 has a total of 8 bundles.

[0031] The standard segment 11 is composed of a steel pipe main chord II111, a horizontal web member II112, and a diagonal web member II113. Each standard segment 11 has the same cross-sectional dimensions, and has product universality and interchangeability.

[0032] The main chords of the upper part 1 of the constant cross-section truss structure and the lower part 2 of the gradually changing cross-section truss structure are steel pipes with diameters ranging from 0.8 to 1.2 m.

[0033] The horizontal and diagonal web members are square tubes.

[0034] By combining the lower gradually changing cross section and the upper constant cross section, the web members and the main chord are connected by bolts. Prestressed steel strands 3 are added inside the main chord to reduce the stress level of the main chord connecting bolts, improve the fatigue service life of the whole machine, and meet the support structure requirements of ultra-high height wind turbines.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A new full truss type wind power tower structure, characterized in that: The application relates to a constant-section truss upper part (1) and a gradually-changing-section truss lower part (2) which are composed of multiple segments, the segments are assembled by using a bar sheet structure, the segments of the constant-section truss upper part (1) are standard segments (11), the segments of the gradually-changing-section truss lower part (2) are gradually-changing segments (21), the segments are composed of a steel pipe main chord, a transverse web and an inclined web, and prestressed steel strands (3) are additionally arranged in the main chord; the gradually-changing segment (21) is composed of a steel pipe main chord I (211), a transverse web I (212) and an inclined web I (213), the steel pipe main chord I (211) is respectively provided with a node plate (2111) at the upper and lower connecting positions of the segments, the node plate (2111) is provided with bolt connecting holes, the steel pipe main chord I (211) is connected with the inclined web I (213) through a connecting plate I (214) and bolts, the connecting plate I (214) is symmetrically and directly inserted at two sides, one end of the connecting plate I (214) is inserted into the inner side of the inclined web I (213), the main chord of the inclined web I (213) is a square tube, the other end of the connecting plate I (214) is extended to the node plate (2111) of the main chord, and the two ends are assembled and connected through bolts.

2. A new full truss type wind power tower structure according to claim 1, characterized in that: The transverse web I (212) and the inclined web I (213) are connected through bolts, the inclined web I (213) is divided into an upper inclined web (2131) and a lower inclined web (2132), the transverse web I (212) is a single square tube, the upper inclined web (2131), the lower inclined web (2132) and the transverse web I (212) are connected through a connecting plate II (215) in a bolt connection structure, and the connecting plate II (215) is arranged on the outer side of the square tube and is composed of two connecting plates.

3. The new full truss type wind power tower structure according to claim 1, characterized in that: The prestressed steel strands (3) are arranged in the steel pipe main chord I (211), the two ends of the prestressed steel strands (3) are respectively provided with steel strand anchor plates (2112) and steel strand positioning grooves (2113), and the steel strands (3) pass through the steel strand positioning grooves (2113) and extend from the bottom of the truss tower main chord to the top.

4. The new full truss type wind power tower structure according to claim 3, characterized in that: The steel strands (3) are composed of eight steel strands.

5. The new full truss type wind power tower structure according to claim 1, characterized in that: The standard segment (11) is composed of a steel pipe main chord II (111), a transverse web II (112) and an inclined web II (113), and the cross section size of each standard segment (11) is consistent.

6. The new full truss type wind power tower structure according to claim 1, characterized in that: The steel pipe main chords of the constant-section truss upper part (1) and the gradually-changing-section truss lower part (2) are steel pipes, and the diameters of the steel pipes are distributed between 0.8 and 1.2 m.

7. The new full truss type wind power tower structure according to claim 1, characterized in that: The transverse web and the inclined web are square tubes.

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