CN111441916A

CN111441916A - Horizontal shaft offshore wind generating set tower

Info

Publication number: CN111441916A
Application number: CN202010391149.2A
Authority: CN
Inventors: 崔逸南; 崔新维; 王晖
Original assignee: Beijing Sanli Xinneng Science & Technology Co ltd
Current assignee: Beijing Sanli Xinneng Science & Technology Co ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2020-07-24

Abstract

The invention discloses a horizontal shaft offshore wind generating set tower, which comprises a support column, a base and a yawing slewing bearing. The wind generating set tower is fixedly connected with an engine room base of the wind generating set through the upper ends of the three supporting columns, and the lower end of the wind generating set tower is connected with a base on the yaw slewing bearing of the wind generating set, so that the wind generating set tower, the engine room and the impeller supported by the wind generating set tower are in yaw at the bottom of the tower. The invention overcomes the defects of the prior tower cylinder (frame) technology, not only reduces the manufacturing cost of the tower cylinder (frame) but also is convenient for transportation and installation while meeting the requirements of a high-power wind turbine generator.

Description

Horizontal shaft offshore wind generating set tower

Technical Field

The invention relates to a tower of an offshore wind generating set with a horizontal shaft, and belongs to the technical field of wind power generation.

Background

The development of wind power is the most effective way to solve the problem of unit development cost. The continuous development of offshore wind power projects makes the unit become a necessary development trend in large-scale. With the capacity expansion of the wind generating set, the height of the center of the hub of the wind turbine is higher and higher, and the weight of the engine room and the weight of the impeller are higher and higher, so that the diameter of the tower barrel is larger and larger, great challenges are brought to the manufacturing, transportation and installation of the tower barrel, and the cost of the tower barrel is also sharply increased. In view of this trend, it is now necessary to explore and study new wind turbine tower to meet the challenge of greater wind turbine capacity.

CN 201220229112 discloses a supporting structure of a large-capacity wind generating set, which is divided into two parts, the upper part uses a traditional steel conical drum type tower, and the lower part uses other supportable structures. This solution improves the economy of the support structure to a certain extent, but is not optimal and the costs can be reduced again.

CN 201120537920 discloses a novel wind power generator tower, which comprises a base, wherein a plurality of supporting columns for supporting a wind power generator set are arranged on the base, and a plurality of reinforcing connecting rods are arranged between the two supporting columns. The scheme reduces the production cost of the base and the windward area of the tower to a certain extent, but has high requirements on the construction process and quality of the reinforcing connecting rod.

CN 201120531599 discloses a diagonal draw bar tower of a wind power generator, which comprises a main tower tube and a first and a second diagonal draw bars with top ends pivoted on the upper part of the main tower tube. The technical scheme has the advantages of simplified structure and convenient installation, and can realize manual hoisting of the tower, thereby being applicable to various complex terrains and environments, but only applicable to small-capacity wind generating sets.

CN 201720976171 discloses an omnidirectional antidumping reinforced structure of megawatt level aerogenerator, it includes the space steel pipe truss that sets up in the impeller back of the body facade with generator tower section of thick bamboo isothiometric, and the upper end of space steel pipe truss is connected with the upper yaw bearing of generating set upper end, and the bottom is connected with lower yaw bearing through chassis bearing structure. The scheme provides supporting force for the unit to a certain degree, but the structure of the upper yaw bearing and the lower yaw bearing cannot well guarantee the yaw synchronism and the structural stability of the unit.

Disclosure of Invention

The invention aims to provide a tower form of a horizontal-axis offshore wind generating set, which replaces the existing large-diameter cylindrical steel tower barrel to greatly reduce the cost of the existing tower barrel.

The invention provides a scheme of a tower of a horizontal-axis offshore wind generating set, which aims to solve the problems:

the novel wind generating set tower is characterized in that: the main body of the tower is composed of three columns (column 1, column 2, and column 3).

The three pillars are formed by connecting a plurality of sections of section bars, and the section bars can be cylindrical, round tubes or section bars with other section shapes.

According to the description in claim 2), the upper ends of the three struts are fixedly connected with the base of a cabin 7 of the wind turbine generator, and the lower ends of the three struts are connected with the

bases

4, 5 and 6 on a yaw slewing bearing 9 of the wind turbine generator.

According to the description in claim 3), the two said pillars (pillar 1 and pillar 2) at the front constitute a plane perpendicular or approximately perpendicular to the horizontal plane of the wind turbine foundation installation; when the angle is approximately vertical, the included acute angle between the plane and the horizontal plane is not less than 80 degrees; the included angle theta 10 between one post 3 positioned at the rear part and the horizontal plane for installing the wind turbine generator base is not more than 90 degrees, and the base 6 connected with the lower end and the bases 4 and 5 are distributed on the yaw slewing bearing 9 in an isosceles triangle shape.

According to the description in claims 3) and 4), the lower end of the tower of the wind turbine is provided with a yaw slewing bearing 9, and the wind turbine tower and the nacelle 7 and the impeller 8 supported by the wind turbine tower are yawed at the bottom of the tower.

The invention has the beneficial effects that: the three bases are respectively provided with a strut for supporting the wind generating set, so that the whole steel consumption of the tower can be reduced; meanwhile, each support column corresponds to one base, and a triangular structure is formed among the three support columns, so that the overall stability of the tower is facilitated.

Drawings

Specific embodiments will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a front view of a tower.

FIG. 2 is a side view of the tower.

FIG. 3 is a top view of the tower.

It is noted that the above-described figures are intended to illustrate the features of the invention and are not intended to show any actual structure or to reflect the details of the dimensions, relative proportions, etc. of the various components. In order to more clearly illustrate the principles of the present invention and to avoid obscuring the same in unnecessary detail, the examples in the drawings have been simplified. These illustrations do not represent an inconvenience to those skilled in the relevant art (wind power generation) in understanding the present invention, and more components may be included in an actual multiple-bladed wind power generation system.

Detailed Description

The invention adopts the following specific implementation scheme:

as shown in fig. 1 and 2, a horizontal axis offshore wind turbine tower comprises a strut 1, a strut 2, a strut 3, a base 4, a base 5, a base 6, a nacelle 7, an impeller 8 and a yaw slewing bearing 9 of a wind turbine;

the engine room 7 is connected with the impeller 8 through a mechanical structure, and the upper ends of the front strut 1, the strut 2 and the rear strut 3 are fixedly connected with the base of the engine room 7 through the mechanical structure to support the engine room 7 and the impeller 8 together. The lower ends of the front supporting columns 1 and the lower ends of the supporting columns 2 are respectively fixed on the bases 4 and 5, the two supporting columns are in a splayed shape, and the plane formed by the two supporting columns is vertical or approximately vertical to the horizontal plane installed on the wind turbine generator base (when the plane is approximately vertical, the acute angle formed by the plane and the horizontal plane is not less than 80 degrees). The rear strut 3 supports the bottom of the nacelle 7 obliquely upwards from the base 6 at an angle θ 10 of no more than 90 ° to the horizontal plane of the wind turbine foundation and the diameter of the strut 3 is generally larger than the diameter of the front struts 1, 2 because the strut 3 needs to resist the load component caused by aerodynamic thrust.

The pillars 1, 2, 3 may be fixed to the base by concrete casting or flange connection. The pillar is formed by connecting a plurality of sections of section bars, and the section bars can be cylinders, round pipes or other section shapes.

The struts 1, 2, 3 and the yaw slewing bearing 9 are connected and fixed through a base, as shown in fig. 3, the

bases

4, 5, 6 are distributed on the yaw slewing bearing 9 in an isosceles triangle shape, that is, the length of the connecting line of the bases 4 and 6 is equal to the length of the connecting line of the

bases

5 and 6. The entire wind turbine tower and its supporting nacelle 7 and impeller 8 are yawed at the bottom of the tower.

The embodiments described in this patent are some, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims

1. A horizontal axis offshore wind generating set tower which is characterized in that: the main body of the tower is composed of three columns (column 1, column 2, and column 3).

2. The three pillars are formed by connecting a plurality of sections of section bars, and the section bars can be cylindrical, round tubes or section bars with other section shapes.

3. According to the description in claim 2), the upper ends of the three struts are fixedly connected with the base of a cabin 7 of the wind turbine generator, and the lower ends of the three struts are connected with the bases 4, 5 and 6 on a yaw slewing bearing 9 of the wind turbine generator.

4. According to the description in claim 3), the two said pillars (pillar 1 and pillar 2) at the front constitute a plane perpendicular or approximately perpendicular to the horizontal plane of the wind turbine foundation installation; when the angle is approximately vertical, the included acute angle between the plane and the horizontal plane is not less than 80 degrees; the included angle theta 10 between one post 3 positioned at the rear part and the horizontal plane for installing the wind turbine generator base is not more than 90 degrees, and the base 6 connected with the lower end and the bases 4 and 5 are distributed on the yaw slewing bearing 9 in an isosceles triangle shape.

5. According to the description in claims 3) and 4), the lower end of the tower of the wind turbine is provided with a yaw slewing bearing 9, and the wind turbine tower and the nacelle 7 and the impeller 8 supported by the wind turbine tower are yawed at the bottom of the tower.