Tower column inclined inhaul cable self-balancing wind power supporting structure system

Abstract

The utility model provides a tower column inclined inhaul cable self-balancing wind power supporting structure system. The supporting structure system comprises an obliquely-arranged central tower column, and a wind turbine generator set is installed at the top end of the central tower column. A lower supporting frame is arranged on the lower portion of the central tower column, an inclined supporting frame is arranged in the middle of the central tower column, inhaul cable assemblies are arranged between every two of the central tower column, the inclined supporting frame and the lower supporting frame, and the bottom end of the central tower column and the bottom end of the lower supporting frame are installed on a plurality of independent bases through movable bases respectively. The inhaul cable assemblies are arranged between the inclined supporting frames and the lower supporting frames in a pairwise mode, so that the absolute value of the bending moment of the central tower column is greatly reduced and even is 0, and the construction cost of the tower is effectively reduced; meanwhile, the wind power tower and the wind turbine generator are assembled on the ground and then rotated in place, the process is simple, ultrahigh hoisting equipment is not needed, and the installation cost and the construction risk are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power, in particular to a tower column inclined cable self-balancing wind power supporting structure system. Background Art

[0002] Due to its beautiful appearance, small space occupation and high support height, the independent tower structure has been widely used in large wind turbines. Traditional independent towers generally use cylindrical or conical steel towers, which are composed of multiple sections connected by flanges.

[0003] However, with the development trend of large-scale wind turbines, the height and diameter of the tower are increasing. For existing independent wind turbine towers, the horizontal displacement (i.e., stiffness index) at the center of the wind turbine hub at the top of the tower is proportional to the cube of the tower. As the tower height increases, in order to meet the stiffness and strength index of the tower, the cost of the tower increases exponentially.

[0004] At the same time, the production, transportation and installation costs of large-diameter high towers are extremely high. The towers are processed and manufactured in workshops, which requires large-scale manufacturing equipment, and each segment needs to be connected by a large-diameter flange, which increases the production cost; the transportation is more difficult due to restrictions on road load or turning radius, bridges and tunnels, etc.; large-diameter towers are heavy, and large-tonnage cranes are required for installation, which increases the installation cost.

[0005] In addition, large-diameter towers require large foundation supports. Wind loads create a huge overturning moment at the bottom of the tower, so a large, solid reinforced concrete foundation is needed to resist this effect. However, the traditional independent foundation has sufficient compressive strength but insufficient anti-overturning ability. In order to meet the large overturning moment requirements of the wind turbine foundation, it is necessary to increase the plane size of the foundation and set up strong prestressed anchors. The efficiency of the foundation structure tends to decrease, resulting in a large waste of design resources. In addition, the construction of the foundation is a large-volume reinforced concrete construction, which has a long construction period, high difficulty, poor stability, and difficult to guarantee construction quality. Utility Model Content

[0006] The purpose of the utility model is to provide a tower column inclined cable self-balancing wind power support structure system. It is used to solve the technical problems such as the difficulty in manufacturing, transportation and installation caused by the large tower column structure of the existing wind turbine generator set, and the large overturning moment that needs to be overcome due to the unbalanced force of the support structure. The separately set base can also reduce the amount of earth excavation and reduce the construction cost.

[0007] A tower column inclined cable self-balancing wind power support structure system, comprising an inclined central tower column, a wind turbine unit is installed on the top of the central tower column;

[0008] A lower support frame is arranged at the lower part of the central tower column, an oblique support frame is arranged at the middle part of the central tower column, and cable assemblies are arranged between each of the central tower column, the oblique support frame and the lower support frame. The bottom ends of the central tower column and the lower support frame are respectively installed on a plurality of independent bases through movable seats.

[0009] Optionally, the lower support frame includes a plurality of inclined legs arranged obliquely;

[0010] The top ends of the plurality of oblique legs are connected to the middle of the central tower column, and the axes of the plurality of oblique legs intersect with the axis of the central tower column at the same rigid node, and the plurality of oblique legs are rotated in sequence around the rigid node.

[0011] Optionally, the oblique support frame includes a plurality of oblique support rods arranged obliquely, and one end of each of the oblique support rods is connected to the middle of the central tower column;

[0012] Axles of the plurality of oblique braces intersect at the rigid node, and the plurality of oblique braces are sequentially rotated around the rigid node.

[0013] Optionally, the rigid node is located at 1 / 5 to 1 / 3 of the height of the central tower column.

[0014] Optionally, the cable assembly includes a forward cable, a rear upward cable, a rear downward cable and a transverse cable;

[0015] The side where the impeller of the wind turbine is located is defined as the front side of the central tower column. A number of forward cables are connected between the oblique legs located on the front side and the central tower column. A number of rear upward cables are connected between the other ends of a number of the oblique struts and the upper part of the central tower column. Rear downward cables are connected between a number of the oblique struts and the oblique legs below them and the bottom end of the central tower column. Transverse cables are connected between adjacent oblique struts.

[0016] Optionally, one end of each of the forward cables is connected to the bottom end of the oblique support leg, and the forward cables are sequentially connected to the central tower column from bottom to top along the axis direction of the central tower column;

[0017] The plurality of forward cables are all located at the rear side of the wind turbine blade plane, and the angle between the axis of the forward cable located at the top of the central tower and the wind turbine impeller plane is 0-15°.

[0018] Optionally, one end of a plurality of the rear upward cables and one end of a plurality of the rear downward cables are connected to the other end of the oblique support rod;

[0019] A plurality of rear upward cables are sequentially connected to the upper portion of the central tower column from bottom to top along the axis direction of the central tower column, and a plurality of rear downward cables are sequentially connected to the lower portion of the central tower column from bottom to top along the axis direction of the central tower column.

[0020] Optionally, the plurality of forward cables, rear upward cables, rear downward cables and lateral cables are all pre-tensioned cables.

[0021] Optionally, the rotation axes of multiple movable seats used for rotation construction are on the same straight line.

[0022] Due to the adoption of the above technical solution, the utility model has the following advantages:

[0023] 1. The present application sets forward cables, rear upward cables and rear downward cables on both sides of the tower frame, so that the absolute value of the bending moment of the tower frame is greatly reduced or even 0, which is beneficial to greatly reduce the steel consumption of the tower frame and effectively reduce the construction cost of the tower frame.

[0024] 2. This application assembles the wind turbine tower support structure and wind turbine generator set on the ground and then rotates them into place. The installation process is simple and does not require ultra-high lifting equipment, which greatly reduces installation costs and construction risks.

[0025] 3. This application can make the foundation only subject to pressure or very small tension by adjusting the center of gravity or adjusting the cable tension, thereby greatly reducing the amount of steel and concrete used in the foundation and reducing the construction cost.

[0026] 4. This application greatly reduces the amount of steel used in the tower frame by setting cables, and the lightweight tower and foundation are easy to transport and install, and do not require super-large lifting equipment, thereby reducing construction costs.

[0027] 5. The cable of the present application uses its own structure for anchoring and vibration reduction, effectively preventing the tower from vibrating significantly and avoiding fatigue damage. Compared with the existing tower vibration reduction scheme, it can reduce the land acquisition and construction costs caused by the anchoring setting.

[0028] 6. The foundation diameter of a conventional tower is large, and the excavation volume is also large. The corresponding supports of the base of this application are independently set, and the base elevations can be inconsistent, which can significantly reduce the foundation excavation volume.

[0029] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings of the present utility model are described as follows.

[0031] Figure 1 This is a structural schematic diagram of the practical tower column inclined cable self-balancing wind power support structure system.

[0032] Figure 2 This is a structural schematic diagram of the practical rotation construction support structure system when it is placed on the ground.

[0033] Figure 3 This is a structural schematic diagram of the practical rotation construction support structure system during rotation.

[0034] In the figure: 1-central tower column; 2-wind turbine; 3-oblique legs; 4-oblique support rods; 5-forward cables; 6-rear upward cables; 7-rear downward cables; 8-lateral cables; 9-base; 10-movable seat; 11-auxiliary pull ropes; 12-temporary pull rods. DETAILED DESCRIPTION

[0035] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0036] Embodiment 1:

[0037] like Figure 1 The tower column inclined cable self-balancing wind power support structure system shown comprises a central tower column 1 arranged obliquely, and a wind turbine 2 is installed on the top of the central tower column 1;

[0038] A lower support frame is provided at the lower part of the central tower column 1, and an oblique support frame is provided at the middle part of the central tower column 1. Cable assemblies are provided between the central tower column 1, the oblique support frame and the lower support frame. The bottom ends of the central tower column 1 and the lower support frame are respectively installed on a number of independent bases 9 through movable seats 10.

[0039] In this embodiment, the wind turbine set 2 is restricted by the rear-upward cable 6, and the yaw angle of the wind turbine set is about 300°; the central tower column 1 is tilted to avoid its influence on the sweep of the wind turbine blades, and a self-balancing support system is formed by setting the cable assembly to reduce the stress on the central tower column and the foundation. In this embodiment, the point where the cable is connected to the central tower column is called the tower column cable node. This application adjusts the number of tower column cable nodes according to the length of the central tower column 1 to ensure the reasonable stress of the tower column segment, and through the pre-adjustment optimization, the absolute value of the bending moment of the central tower column is very small, or even 0. It is conducive to greatly reducing the amount of steel used in the tower column frame, and the lightweight tower column and foundation are conducive to transportation and installation, and do not require super-large lifting equipment, reducing construction costs.

[0040] In this embodiment, the rotation axes of the multiple movable seats 10 used for the rotation construction are on the same straight line.

[0041] like Figure 1 As shown, the lower support frame includes a plurality of inclined legs 3;

[0042] The top ends of the plurality of oblique legs 3 are connected to the middle of the central tower column 1, and the axes of the plurality of oblique legs 3 intersect with the axis of the central tower column 1 at the same rigid node, and the plurality of oblique legs 3 are rotated in sequence around the rigid node.

[0043] like Figure 1 As shown, the oblique support frame includes a plurality of oblique support rods 4 arranged obliquely, and one end of each of the oblique support rods 4 is connected to the middle of the central tower column 1;

[0044] The axes of the plurality of oblique braces 4 intersect at the rigid node, and the plurality of oblique braces 4 are sequentially rotated around the rigid node.

[0045] In this embodiment, there are two oblique struts 4 and three oblique legs 3, and the bottom ends of the three struts and the central tower column 1 are respectively mounted on four bases 9. In this embodiment, the rigid node is located at 1 / 5 to 1 / 3 of the total height of the central tower column 1.

[0046] like Figure 1 As shown, the cable assembly includes a forward cable 5, a rear upward cable 6, a rear downward cable 7 and a transverse cable 8;

[0047] The side where the wind turbine is located is defined as the front side of the central tower column 1, and a number of forward cables 5 are connected between the oblique legs 3 located on the front side and the central tower column 1, a number of rear upward cables 6 are connected between the other ends of a number of the oblique struts 4 and the upper part of the central tower column 1, a number of rear downward cables 7 are connected between a number of the oblique struts 4 and the oblique legs 3 below them and the bottom end of the central tower column 1, and transverse cables 8 are connected between adjacent oblique struts 4.

[0048] like Figure 1 As shown, one end of the plurality of forward cables 5 is connected to the bottom end of the oblique legs 3 , and the plurality of forward cables 5 are sequentially connected to the central tower column 1 from bottom to top along the axial direction of the central tower column 1 .

[0049] like Figure 1 As shown, one end of the plurality of rear upward cables 6 and one end of the plurality of rear downward cables 7 are connected to the other end of the oblique support rod 4;

[0050] The plurality of rear upward cables 6 are sequentially connected to the upper portion of the central tower column 1 from bottom to top along the axis direction of the central tower column 1 , and the plurality of rear downward cables 7 are sequentially connected to the lower portion of the central tower column 1 from bottom to top along the axis direction of the central tower column 1 .

[0051] In this embodiment, there are four forward cables 5, which are divided into two groups. Both groups of forward cables 5 are connected between the two oblique legs 3 located at the front and the central tower column 1. There are four rear upward cables 6 and four rear downward cables 7, which are divided into two groups. Both groups of rear upward cables 6 are connected between the other ends of the two oblique struts 4 and the upper part of the central tower column 1. Both groups of rear downward cables 7 are connected to the two oblique struts 4 and the oblique legs 3 on the left and right sides below them.

[0052] In this embodiment, the plurality of forward cables 5 are all located at the rear side of the wind turbine impeller plane, and the angle between the axis of the forward cables 5 located at the top of the central tower column 1 and the wind turbine blade plane is 0° to 15°, which effectively avoids the technical problem of interference between the forward cables 5 and the wind turbine blades. The plurality of forward cables 5, rear upward cables 6, rear downward cables 7 and transverse cables 8 are all pre-tensioned cables and are equipped with vibration dampers at both ends.

[0053] In this embodiment, a shock absorber is provided on each cable, and a TMD damper is provided on the central tower column, etc., which effectively prevents the tower frame from vibrating greatly and avoids fatigue damage. At the same time, by adjusting the center of gravity or adjusting the cable force, the foundation can be subjected to only pressure or very small tension, thereby greatly reducing the amount of steel and concrete used in the foundation and reducing the construction cost.

[0054] Embodiment 2:

[0055] A tower column inclined cable self-balancing wind power support structure system and a rotation construction method are used to rotate the tower column inclined cable self-balancing wind power support structure system described in Example 1, and the specific steps are:

[0056] S1, such as Figure 2 As shown, the central tower column 1, the oblique legs 3 and the oblique struts 4 are assembled on the ground, and then the forward cables 5, the rear upward cables 6, the rear downward cables 7 and the transverse cables 8 are installed, and finally the wind turbine and blades of the wind turbine 2 are installed;

[0057] S2, such as Figure 2 As shown, the bottom of the oblique leg 3 is mounted on the base 9 through a movable seat;

[0058] S3, such as Figure 2 and Figure 3 As shown, auxiliary pull ropes 11 are installed at the ends of the oblique struts 4 and the top of the central tower column 1, and temporary pull rods 12 are installed at the bottoms of the oblique legs 3 and the bottoms of the central tower column 1. The auxiliary pull ropes 11 are tightened by a winch, and the temporary pull rods 12 are removed after the rotation is completed;

[0059] S4, such as Figure 3As shown, with the bottom end of the oblique support leg 3 installed on the base 9 as the rotation fulcrum, the auxiliary cable 11 connected to the oblique support rod 4 is pulled by the winch to make the structure rotate. After reaching a certain angle, the auxiliary cable 11 connected to the top of the central tower column 1 begins to pull the structure to a balanced state;

[0060] S5, simultaneously controlling the winches on both sides to make the bottom of the central tower column 1 fall on the movable seat 10 and complete the fixation;

[0061] S6. Adjust the forward cable 5, the rear upward cable 6, the rear downward cable 7 and the transverse cable 8 again to make the structure bear better stress.

[0062] In this embodiment, the rotation construction process is as follows: the bottom of the oblique leg 3 is used as the rotation point, the structure is assembled on the ground as a whole, and then the wind turbine unit and blades are installed on the ground, and the bottom of one oblique leg 3 is installed on the base 9 through a movable seat. After completion, the bottom of the central tower column 1 is pulled to rotate the structure to a vertical state. The rotation construction is carried out after the foundation is completed.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.

Claims

1. A tower column inclined cable self-balancing wind power support structure system, characterized in that: It comprises a central tower column (1) arranged at an angle, a wind turbine group (2) being installed at the top of the central tower column (1); A lower support frame is arranged at the bottom of the central tower column (1), an oblique support frame is arranged at the middle of the central tower column (1), and cable assemblies are arranged between each of the central tower column (1), the oblique support frame and the lower support frame. The bottom ends of the central tower column (1) and the lower support frame are respectively mounted on a plurality of independent bases (9) through movable seats (10).

2. The tower column inclined cable self-balancing wind power support structure system according to claim 1 is characterized in that: The lower support frame comprises a plurality of inclined supporting legs (3) arranged obliquely; The top ends of the plurality of oblique legs (3) are connected to the middle of the central tower column (1), and the axes of the plurality of oblique legs (3) intersect with the axis of the central tower column (1) at the same rigid node, and the plurality of oblique legs (3) are arranged to rotate in sequence around the rigid node.

3. The tower column inclined cable self-balancing wind power support structure system according to claim 2 is characterized in that: The oblique support frame comprises a plurality of oblique support rods (4) arranged obliquely, and one end of each of the plurality of oblique support rods (4) is connected to the middle of the central tower column (1); The axes of the plurality of oblique support rods (4) all intersect at the rigid node, and the plurality of oblique support rods (4) are arranged to rotate in sequence around the rigid node.

4. A tower column inclined cable self-balancing wind power support structure system according to claim 2 or 3, characterized in that: The rigid node is located at 1 / 5 to 1 / 3 of the total height of the central tower column (1).

5. The tower column inclined cable self-balancing wind power support structure system according to claim 3 is characterized in that: The cable assembly comprises a forward cable (5), a rear upward cable (6), a rear downward cable (7) and a transverse cable (8); The side where the impeller of the wind turbine is located is defined as the front side of the central tower (1); a plurality of forward cables (5) are connected between the oblique legs (3) located on the front side and the central tower (1); a plurality of rearward cables (6) are connected between the other ends of a plurality of oblique struts (4) and the upper part of the central tower (1); a plurality of rearward cables (7) are connected between a plurality of oblique struts (4) and the oblique legs (3) below them and the bottom end of the central tower (1); and transverse cables (8) are connected between adjacent oblique struts (4).

6. The tower column inclined cable self-balancing wind power support structure system according to claim 5, characterized in that: One end of each of the forward cables (5) is connected to the bottom end of the oblique support leg (3), and the forward cables (5) are sequentially connected to the central tower column (1) from bottom to top along the axis direction of the central tower column (1); The plurality of forward cables (5) are all located at the rear side of the wind turbine blade plane, and the angle between the axis of the forward cables (5) located at the top of the central tower (1) and the wind turbine impeller plane is 0° to 15°.

7. The tower column inclined cable self-balancing wind power support structure system according to claim 5, characterized in that: One end of each of the plurality of rear upward cables (6) and the plurality of rear downward cables (7) is connected to the other end of the oblique support rod (4); A plurality of rear upward cables (6) are sequentially connected to the upper portion of the central tower column (1) from bottom to top along the axial direction of the central tower column (1), and a plurality of rear downward cables (7) are sequentially connected to the lower portion of the central tower column (1) from bottom to top along the axial direction of the central tower column (1).

8. The tower column inclined cable self-balancing wind power support structure system according to claim 5, characterized in that: The plurality of forward cables (5), rear upward cables (6), rear downward cables (7) and transverse cables (8) are all pre-tensioned cables.

9. The tower column inclined cable self-balancing wind power support structure system according to claim 5, characterized in that: The rotation axes of the plurality of movable seats (10) used for the rotation construction are on the same straight line.

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