CN216950690U - Floating type wind generating set - Google Patents

Abstract

The utility model discloses a floating type wind generating set which comprises a floating type foundation structure, a mooring cable system, an anchoring foundation and wind power. The floating foundation structure is a semi-submersible platform and comprises a plurality of upright columns, a plurality of water pressing plates, a top cross beam and a plurality of bottom cross struts; each upright post is formed by connecting an upper section, a middle section and a lower section, and the cross sectional area of the middle section is smaller than that of the upper section and that of the lower section; the plurality of water pressing plates are correspondingly arranged at the bottoms of the plurality of upright posts one by one; the top cross beam is connected among the top ends of the plurality of upright columns; a plurality of bottom cross braces are correspondingly connected between two adjacent water pressing plates one by one; the mooring system comprises a plurality of groups of mooring cables, one end of each mooring cable is connected with the lower sections of the upright posts, the other end of each mooring cable is connected with the anchoring foundation, and the included angle between each group of mooring cables and the seabed is 0-30 degrees after each group of mooring cables is tensioned; the wind driven generator is arranged in the center of the top cross beam. The utility model can effectively reduce the motion amplitude of the whole structure of the unit and can improve the service life of the unit.

Description

Floating type wind generating set

Technical Field

The utility model relates to a floating type wind generating set.

Background

With the gradual saturation of the development of resources in the near and shallow sea, the development of offshore wind power tends to move to the deep and far sea field. The deep sea wind energy resources in China are rich, the development potential is large, and the floating type technology is suitable for driving the development of the deep sea wind power industry. Compared with offshore, the deep sea environment is worse, various hydrological phenomena such as ocean currents, waves, tides and internal waves, and long-term physiological effects such as corrosion, scouring and elutriation exist, and more severe requirements are undoubtedly provided for technologies such as wind turbine foundations, submarine cables and offshore platform integration. In consideration of the technical difficulty and the construction cost, the fixed foundation is not suitable any more, and the deep sea wind power plant mainly adopts a floating foundation.

The existing offshore wind power floating foundation has the main types as follows: spar type (upright column type) foundations, TLP type foundations and semi-submersible type foundations, which are often moored in catenary and tendons. The mooring mode of catenary is generally applicable to semi-submersible foundations, mainly comprises anchor chains and steel cables, the anchor chains are horizontally connected with the sea bottom, the anchor points are only stressed by the force in the horizontal direction, the restoring force of the mooring lines is generated by the gravity of the mooring lines, the catenary is generally longer in length, larger in weight and higher in cost, and the construction cost of the catenary can be greatly increased for offshore floating wind power sensitive to the cost. The tension tendons are mainly used for TLP type foundations, but the development of the tension tendons and connecting devices thereof suitable for offshore floating wind power has certain difficulty and higher use risk, and the installation of the tension tendons based on the TLP type foundations is difficult, and special ship equipment is possibly required to be adopted to assist the offshore installation, so that huge challenges are brought to the construction cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a floating type wind generating set which can effectively reduce the motion amplitude of the overall structure of the set and can prolong the service life of the overall structure of the set.

The purpose of the utility model is realized as follows: a floating type wind generating set comprises a floating type foundation structure, a mooring cable system, an anchoring foundation and wind power; wherein,

the floating foundation structure is a semi-submersible platform and comprises a plurality of upright columns, a plurality of water pressing plates, a top cross beam and a plurality of bottom cross struts; the plurality of upright columns are arranged in a regular polygon mode by connecting lines, each upright column is formed by connecting an upper section, a middle section and a lower section, the structure and the cross section of the upper section are the same as those of the lower section in a one-to-one correspondence manner, and the cross sectional area of the middle section is smaller than that of the upper section and that of the lower section; a plurality of water pressing plates are correspondingly arranged at the bottoms of the plurality of upright posts one by one; the top cross beam is connected among the top ends of the plurality of upright columns; a plurality of bottom cross braces are correspondingly connected between two adjacent water pressing plates one by one;

the mooring system comprises a plurality of sets of mooring cables; each group of mooring cables comprises two or three mooring cables, and each mooring cable is a whole segment of fiber rope; one end of each of the plurality of groups of mooring cables is correspondingly connected with the lower sections of the plurality of upright posts of the semi-submersible platform one by one through the connecting devices;

the anchoring foundation comprises a plurality of groups of anchor piles fixed on the seabed; the number of the pile anchors in each group is the same as that of the mooring cables in each group; the anchor piles are respectively connected with the other ends of the mooring cables through connecting devices in a one-to-one correspondence mode, so that the included angle between each mooring cable and the seabed is 0-30 degrees after each mooring cable is tensioned;

the wind driven generator comprises a tower barrel arranged in the center of the top cross beam, a cabin arranged at the top of the tower barrel and three blades arranged at one end of the cabin.

In the floating wind generating set, the water pressing plate is replaced by the floating box.

In the floating wind turbine generator system, the anchor piles are replaced by gravity anchors or suction anchors.

The floating type wind generating set has the following characteristics:

(1) the mooring cable is in a tensioning type and is intersected with the seabed at a certain angle, so that the anchoring point of the mooring cable can provide horizontal force and vertical force of different combinations at the same time, the mooring cable is suitable for different environmental conditions, and the stability of the whole structure of the unit is ensured; the restoring force of the mooring hawsers is mainly generated by the elasticity of the mooring hawsers and the angular change of the orientation of the mooring hawsers caused by the movement of the base structure; in addition, the mooring cable is shorter in length, occupies a smaller range than a catenary mooring system in the seabed, reduces the risk of collision with other underwater facilities, is lower in cost and good in economical efficiency, and can also reduce the overall weight of the mooring system;

(2) the upright columns near the sea level are set into the water permeable structure with the reduced cross section size, so that the volume of the upright columns near the sea level is reduced, the buoyancy change of the whole floating body caused by the periodic change of the tide level is reduced, the service life of the floating type wind generating set is prolonged, and the purpose of reducing the cost is achieved.

Drawings

FIG. 1 is a perspective view of the floating wind turbine of the present invention;

FIG. 2 is a front view of the floating wind turbine of the present invention;

FIG. 3 is a top view of the floating wind turbine of the present invention;

Detailed Description

The utility model will be further explained with reference to the drawings.

Referring to fig. 1 to 3, the floating wind turbine of the present invention includes a floating foundation structure, a mooring cable system, and an anchor foundation.

The floating type foundation structure is a semi-submersible type platform and comprises three upright posts 11, three water pressing plates 12, a top cross beam 13 and three bottom cross braces 14; wherein,

the three upright posts 11 are arranged in a manner that connecting lines are in an equilateral triangle, each upright post 11 is a quadrangular prism and is formed by connecting an upper section 11a, a middle section and a lower section 11c, the structure and the cross section of the upper section 11a are the same as those of the lower section 11c in one-to-one correspondence, and the middle section is a water permeable section 11b, and the cross sectional area is smaller than that of the upper section 11a and that of the lower section 11 c; the three water pressing plates 12 are correspondingly arranged at the bottoms of the three upright posts 11 one by one, the water pressing plates 12 can also be replaced by buoyancy tanks, and the cross section size of the water pressing plates 12 or the buoyancy tanks is larger than the cross section area of the lower sections 11c of the upright posts 11, so that the mass and the damping of the semi-submersible platform are increased, and the motion of the semi-submersible platform is reduced; the top beam 13 is Y-shaped and is connected among the top ends of the three upright posts 11; the three bottom wales 14 are connected between the two adjacent water pressing plates 12 in a one-to-one correspondence manner.

The mooring system comprises three sets of mooring lines 2; each group of mooring cables 2 comprises two or three mooring cables, and each mooring cable 2 adopts a whole section of fiber rope; one ends of the three groups of mooring cables 2 are respectively connected with the lower sections of the three upright posts 11 of the semi-submersible platform in a one-to-one correspondence way through connecting devices.

The anchoring foundation comprises three groups of anchor piles 3 which are fixed on the seabed and have larger vertical tensile resistance, and a gravity anchor or a suction anchor can also be adopted; the number of each group of anchor piles 3 is the same as that of each group of mooring cables 2; the three groups of anchor piles 3 are respectively connected with the other ends of the three groups of mooring cables 2 in a one-to-one correspondence way through connecting devices, so that the included angle alpha between each group of mooring cables 2 and the seabed after being tensioned is 0-30 degrees.

The wind turbine comprises a tower 41 mounted in the center of the top beam 13 of the semi-submersible platform, a nacelle 42 mounted on top of the tower 41, and three blades 43 mounted at one end of the nacelle 42.

The utility model relates to a floating type wind generating set, which adopts the following construction method and flow to install a mooring cable system and an anchoring foundation. Firstly, driving an anchor pile 3 into a preset position in a seabed through an installation vessel; and secondly, connecting the mooring cable 2 with the anchor pile 3 through a connecting device, tying a buoyancy ball on the mooring cable 2, lifting the buoyancy ball and the mooring cable 2 after the mooring cable 2 and the anchor pile 3 are connected, and connecting the upper end of the mooring cable 2 with the lower section 11c of the upright post 11 of the semi-submersible platform through the connecting device to complete installation.

During the service period of the wind driven generator, each group of mooring cables 2 is always in a tensioning state so as to restrict the free movement and rotation of the whole floating body formed by the floating type foundation structure of the wind driven generator and ensure the safe work of the wind driven generator. The included angle between the mooring cable 2 and the seabed can be adjusted by changing the driving position of the anchor pile 3, so that the good stability of the floating wind generating set is ensured. When the floating wind generating set moves under the action of larger external force, the mooring cable 2 of the part for limiting the movement is further tensioned to generate larger horizontal component force, so that the further increase of the displacement of the floating wind generating set is limited.

Because the motion of drawing tensioning type mooring cable to one side has retrained whole body, along with the change of tide level, the volume that whole body immerses the sea water can take place periodic variation, the buoyancy that whole body received can constantly change thereupon, mooring cable's pulling force also receives very big influence, the periodic variation of load can aggravate the fatigue failure of floating foundation structure, the event sets the middle section of the stand that is in near sea level position into the structure of permeating water that has reduced cross sectional dimension, thereby reduce the volume of the stand that is in near sea level, lead to the buoyancy change of whole body with the periodic variation that reduces the tide level, thereby floating wind generating set's life has been improved, reach reduce cost's purpose. The height and the position of the water permeable section are determined by comprehensively considering factors such as sea tidal range, structural strength design and the like.

The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.

Claims (3)

1. A floating type wind generating set comprises a floating type foundation structure, a mooring cable system, an anchoring foundation and wind power; it is characterized in that the preparation method is characterized in that,

the floating foundation structure is a semi-submersible platform and comprises a plurality of upright columns, a plurality of water pressing plates, a top cross beam and a plurality of bottom cross struts; the plurality of upright columns are arranged in a regular polygon mode by connecting lines, each upright column is formed by connecting an upper section, a middle section and a lower section, the structure and the cross section of the upper section are the same as those of the lower section in a one-to-one correspondence manner, and the cross sectional area of the middle section is smaller than that of the upper section and that of the lower section; the plurality of water pressing plates are correspondingly arranged at the bottoms of the plurality of upright posts one by one; the top cross beam is connected among the top ends of the plurality of upright columns; a plurality of bottom cross braces are correspondingly connected between two adjacent water pressing plates one by one;

the mooring line system comprises a plurality of sets of mooring lines; each group of mooring cables comprises two or three mooring cables, and each mooring cable is a whole segment of fiber rope; one end of each of the plurality of groups of mooring cables is correspondingly connected with the lower sections of the plurality of upright posts of the semi-submersible platform one by one through the connecting devices;

the anchoring foundation comprises a plurality of groups of anchor piles fixed on the seabed; the number of the pile anchors in each group is the same as that of the mooring cables in each group; the anchor piles are respectively connected with the other ends of the mooring cables through connecting devices in a one-to-one correspondence mode, so that the included angle between each mooring cable and the seabed is 0-30 degrees after each mooring cable is tensioned;

the wind driven generator comprises a tower barrel arranged in the center of the top cross beam, a cabin arranged at the top of the tower barrel and three blades arranged at one end of the cabin.

2. The floating wind turbine of claim 1, wherein the pressurized water panel is replaced with a buoyancy tank.

3. A floating wind turbine according to claim 1 wherein the anchor piles are replaced by gravity or suction anchors.

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