CN114576078A - Double wind wheel power generation device - Google Patents

Abstract

The invention provides a double wind wheel power generation device, comprising: the wind power generation device comprises an installation platform (10), a generator cabin (20), a front wind wheel (30) and a rear wind wheel (40), wherein the generator cabin (20) is arranged on the installation platform (10), and power generation equipment is arranged in the installation platform (10) or the generator cabin (20); the front wind wheel (30) is arranged on the generator cabin (20) and is in transmission connection with the power generation equipment, and the front wind wheel (30) comprises three front blades (31); the rear wind wheel (40) is arranged in the generator cabin (20) and is in transmission connection with the power generation equipment, the rear wind wheel (40) comprises two rear blades (41), and the chord length of each rear blade (41) is gradually increased from the blade root to the blade tip and then gradually decreased; the diameter of the front wind wheel (30) is D1, the diameter of the rear wind wheel (40) is D2, and D2 is (0.78-0.85) D1. The double-wind-wheel power generation device is high in power generation efficiency, the rear wind wheel with the two blades is lower in manufacturing cost, and installation and transportation cost is also reduced.

Description

Double wind turbine generator

technical field

The invention relates to the technical field of wind power generation, in particular to a double wind turbine power generation device.

Background technique

As a new renewable energy, wind energy is attracting more and more attention due to its advantages of wide sources, large reserves and non-polluting. Electric energy as a special carrier of energy has the characteristics of cleanliness, high efficiency and environmental friendliness, so it is of great significance to vigorously develop wind power generation.

The wind power generation device in the related art usually uses a wind turbine installed on a tower to generate electricity, and the wind power generation device in this manner is expensive and is not conducive to wide-scale use. Therefore, the ratio of the total power generation of all wind power plants to the number of wind power plants in a certain area is small.

Therefore, how to improve the average power generation of a single wind power generation device per unit time has become a technical problem to be solved urgently in the art.

SUMMARY OF THE INVENTION

The present invention is made based on the inventor's discovery and recognition of the following facts and problems: by installing two wind turbines on one tower to generate electricity, thereby increasing the total amount of electricity generation. In addition, by adjusting the number of blades of the two wind rotors, the purpose of reducing the mutual influence between the two wind rotors is achieved, thereby maximizing the overall efficiency of the two wind rotors.

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention proposes a dual-wind turbine power generation device, comprising:

installation table;

a generator room, the generator room is arranged on the installation platform, and power generation equipment is arranged in the installation platform or in the generator room;

The front wind wheel, the front wind wheel is arranged in the generator room and is connected with the power generation equipment. The front wind wheel includes three front blades, and the chord length of the front blades is from the blade root to the blade tip. gradually increase and then gradually decrease; and

The rear wind wheel, the rear wind wheel is arranged in the generator room and is connected with the power generation equipment. The rear wind wheel also includes two rear blades, and the chord length of the rear blades is from the blade root to the blade tip. First gradually increase, then gradually decrease;

The diameter of the front wind wheel is D1, and the diameter of the rear wind wheel is D2, where D2=(0.78-0.85) D1.

The dual-wind turbine power generation device of the embodiment of the present invention has the following technical effects: by setting the front wind wheel with three front blades and the rear wind wheel with two rear blades, and adjusting the diameter ratio of the front wind wheel and the rear wind wheel As D2=(0.78-0.85) D1, the overall power generation efficiency of the double-wind turbine power generation device is improved, and the manufacturing cost of the rear wind turbine with two blades is lower, and the installation and transportation costs are also reduced.

Optionally, the distance between the front wind wheel and the rear wind wheel is A, and the range of A is 0.25-0.3 times the diameter of the front wind wheel.

Optionally, the length of the gradually increasing portion of the chord length of the front blade from the blade root to the blade tip is 1/7-1/5 of the total length of the front blade;

The length of the gradually increasing portion of the chord length of the rear blade from the blade root to the blade tip is 1/7-1/5 of the total length of the rear blade.

Optionally, the chord length of the front blade is L1, the thickness is S1, the L1 and the S1 are located at the same position of the front blade, the relative chord length of the front blade is equal to S1/L1, and the front blade is equal to S1/L1. The relative chord lengths of the blades ranged from 15% to 40%.

Optionally, the chord length of the rear blade is L2, the thickness is S2, the L2 and the S2 are located at the same position of the rear blade, the relative chord length of the rear blade is equal to S2/L2, and the rear blade is equal to S2/L2. The relative chord lengths of the blades ranged from 15% to 40%.

Optionally, the thickness of the front blade gradually becomes thinner along the direction from the blade root to the blade tip; the thickness of the rear blade gradually becomes thinner along the direction from the blade root to the blade tip.

Optionally, the material of the front blade and/or the rear blade is glass fiber composite material.

Optionally, the power generation equipment is a dual-rotor generator, the rotating shaft of the front wind wheel is drivingly connected to the first rotor of the dual-rotor generator, and the rotating shaft of the rear wind wheel is connected to the double-rotor generator. The second rotor is drivingly connected.

Optionally, the axis of the rotation shaft of the front wind wheel coincides with the axis of the rotation shaft of the rear wind wheel.

Optionally, the installation platform is a hollow concrete tower.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

1 is a schematic perspective view of a dual-wind turbine generator according to an embodiment of the present invention;

FIG. 2 is a rear view of a dual-wind turbine generator according to an embodiment of the present invention;

3 is a front view of a dual-wind turbine generator according to an embodiment of the present invention;

4 is a side view of a dual-wind turbine generator according to an embodiment of the present invention;

5 is a top view of a dual wind turbine generator according to an embodiment of the present invention;

6 is a front view of the front blade of an embodiment of the present invention, and the right side of the front blade is the change trend of the cross-section of the front blade;

FIG. 7 is a spanwise chord length distribution diagram of a front blade according to an embodiment of the present invention.

Reference number: 10-installation table;

20 - generator room;

30-front rotor; 31-front blade;

40-rear rotor; 41-rear blade.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

This embodiment provides a dual-wind turbine power generation device, which can be used on water or on land. Referring to FIG. 1 to FIG. 5 , the dual-wind turbine power generation device mainly includes: an installation platform 10 , a generator cabin 20 , a front wind wheel 30 and a rear wind wheel 40 .

The installation platform 10 can be a concrete tower or a metal tower, and its function is to support the generator cabin 20 and ensure the working stability of the generator cabin 20 and the front and rear wind rotors 30 and 40 disposed on the generator cabin 20 .

The generator cabin 20 is arranged on the installation platform 10; the installation platform 10 or the generator cabin 20 is provided with a power generating device for generating electricity; When the rear wind wheel 40 rotates, the mechanical energy is converted into electrical energy through the generator.

The front wind wheel 30 is arranged in the generator compartment 20 and includes three front blades 31 distributed in a circular array. The chord length of the front blades 31 increases gradually from the blade root to the blade tip, and then gradually decreases; the rear wind wheel 40 is arranged in the The generator nacelle 20 includes two rear blades 41 distributed in a circumferential array, the chord length of the rear blades 41 increases gradually from the blade root to the blade tip, and then gradually decreases; thus, the shape of the front blade 31 and the rear blade 41 are the same , the main difference lies in the different sizes. Specifically, the diameter of the front rotor 30 is D1, and the diameter of the rear rotor 40 is D2, where D2=(0.78-0.85)D1.

In the above scheme, the front wind rotor 30 is provided with three front blades 31 to obtain more wind energy, and the rear wind rotor 40 is provided with two rear blades 41 to capture the airflow passing through the front wind rotor 30. The diameter range of the front wind turbine 30 and the rear wind turbine 40 satisfies D2=(0.78-0.85) D1, so as to maximize the overall power generation efficiency of the dual wind turbine power generation device.

Therefore, the two main features that improve the power generation efficiency of the dual-wind turbine power generation device in the above scheme are: ① the front wind wheel 30 is provided with three blades, the rear wind wheel 40 is provided with two blades, and ② the front wind wheel 30 and the rear wind wheel 40 are provided with two blades. The diameter range of satisfies D2=(0.78-0.85)D1.

The technical personnel of the present application have found through experiments that, in the case where three blades of the front rotor 30 and two blades of the rear rotor 40 are provided, if D2 is less than 0.78D1, or when D2 is greater than 0.85D1, the front rotor 30 and the rear wind The overall power generation efficiency of the wheel 40 will be reduced to a certain extent.

In addition, the manufacturing cost of the rear wind turbine 40 with two blades is lower than that of three blades, and the installation and transportation costs are also reduced, which can improve the construction efficiency of the dual-wind turbine power generation device and shorten the construction period.

In some embodiments, the diameter ratio of the front rotor 30 and the rear rotor 40 may be: D2=0.79D1, D2=0.8D1, D2=0.82D1, and so on.

In some embodiments, the length of the gradually increasing portion of the chord length of the front blade 31 from the blade root to the blade tip is 1/7-1/5 of the total length of the front blade 31; the chord length of the rear blade 41 is from the blade root to the blade. The length of the gradually increasing portion of the tip is 1/7-1/5 of the total length of the rear blade 41 . It can also be seen from FIG. 6 that the chord length of the front blade 31 is gradually increased from the blade root to the blade tip. Within this range, both the front rotor 30 and the rear rotor 40 have high working efficiency.

3, the chord length of the front blade 31 is L1, the thickness is S1, L1 and S1 are located at the same position of the front blade 31, the relative chord length of the front blade 31 is equal to S1/L1, and the range of the relative chord length of the front blade 31 is 15%-40%. Of course, the relative chord lengths of different positions of the front blade 31 are different. Referring to FIG. 6 , it can be seen that the relative chord length of the front blade 31 first increases gradually, and then decreases gradually, and the increasing speed is faster than the decreasing speed.

In some embodiments, the chord length of the rear blade 41 is L2, the thickness is S2, L2 and S2 are located at the same position of the rear blade 41, the relative chord length of the rear blade 41 is equal to S2/L2, and the relative chord length of the rear blade 41 is equal to The range is 15%-40%. Since the rear blade 41 and the front blade 31 use the same type of blade, the view of the rear blade 41 is no longer shown, and those skilled in the art can understand with reference to the front blade 31 .

In some embodiments, the thickness of the leading blade 31 gradually decreases in the direction from the blade root to the blade tip; the thickness of the trailing blade 41 gradually decreases in the direction from the blade root to the blade tip. Therefore, the firmness of the installation of the front blade 31 and the rear blade 41 is ensured, and the rotation is more stable.

In some embodiments, the front rotor 30 includes three front blades 31 , and the rear rotor 40 includes three rear blades 41 . That is to say, the double wind turbine generator in this embodiment adopts the form of three blades at the front and the rear.

In some embodiments, the distance between the front rotor 30 and the rear rotor 40 is A, and the range of A is 0.25-0.3 times the diameter of the front rotor 30 . Within this range, on the basis of ensuring the stable installation of the front rotor 30 and the rear rotor 40, the influence of the front rotor 30 on the rear rotor 40 can be further reduced, thereby improving the overall power generation efficiency of the dual rotor power generation device.

In some embodiments, the power generating equipment is a double rotor generator, the rotating shaft of the front wind wheel 30 is drivingly connected with the first rotor of the double rotor generator, and the rotating shaft of the rear wind wheel 40 is drivingly connected with the second rotor of the double rotor generator. That is to say, only one generator can be arranged in the generator compartment 20, and the front wind wheel 30 and the rear wind wheel 40 respectively drive different rotors of the generator to work, thereby reducing the weight of the generator room 20 and reducing the double wind turbine power generation device. Difficulty of installation.

In some embodiments, the axis of the rotation shaft of the front rotor 30 is coincident with the axis of the rotation shaft of the rear rotor 40 .

In some embodiments, the mounting table 10 is a hollow concrete tower.

In some embodiments, the material of the front blade 31 and/or the rear blade 41 is a glass fiber composite material. The selection of this material can not only ensure the structural strength, but also light in weight, which is conducive to installation and transportation, and also ensures the stability of the power generation process to the greatest extent.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like mean a specific feature, structure, material, or description described in connection with the embodiment or example. Features are included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Embodiments are subject to variations, modifications, substitutions and variations.

Claims (10)

1. A dual wind turbine generator, comprising:

a mounting table (10);

the generator room (20), the generator room (20) is arranged on the installation platform (10), and power generation equipment is arranged in the installation platform (10) or in the generator room (20);

the front wind wheel (30) is arranged on the generator cabin (20) and is in transmission connection with the power generation equipment, the front wind wheel (30) comprises three front blades (31), and the chord length of each front blade (31) is gradually increased from the blade root to the blade tip and then gradually decreased; and

the rear wind wheel (40) is arranged on the generator cabin (20) and is in transmission connection with the power generation equipment, the rear wind wheel (40) comprises two rear blades (41), and the chord length of each rear blade (41) is gradually increased from the blade root to the blade tip and then gradually decreased;

the diameter of the front wind wheel (30) is D1, the diameter of the rear wind wheel (40) is D2, and D2 is (0.78-0.85) D1.

2. A double wind wheel power plant according to claim 1, characterized in that the distance between the front wind wheel (30) and the rear wind wheel (40) is a, in the range of 0.25-0.3 times the diameter of the front wind wheel (30).

3. A double wind turbine generator according to claim 1, wherein the length of the gradually increasing part of the chord length of the front blade (31) from the blade root to the blade tip is 1/7-1/5 of the total length of the front blade (31);

the length of the chord length of the rear blade (41) gradually increasing from the blade root to the blade tip is 1/7-1/5 of the total length of the rear blade (41).

4. The double wind wheel power generation device according to claim 1, wherein the chord length of the front blade (31) is L1, the thickness is S1, the L1 and the S1 are located at the same position of the front blade (31), the relative chord length of the front blade (31) is equal to S1/L1, and the relative chord length of the front blade (31) is in the range of 15% -40%.

5. The twin wind turbine generator of any one of claims 1 to 4, characterised in that the trailing blade (41) has a chord length of L2 and a thickness of S2, the L2 and the S2 are located at the same position of the trailing blade (41), the relative chord length of the trailing blade (41) is equal to S2/L2, and the relative chord length of the trailing blade (41) ranges from 15% to 40%.

6. Double wind turbine generator according to claim 5, characterized in that the thickness of said front blades (31) is tapered in the direction from the blade root to the blade tip; the thickness of the rear blade (41) becomes thinner gradually along the direction from the blade root to the blade tip.

7. Double wind turbine generator according to claim 1, wherein the material of the front blade (31) and/or the rear blade (41) is a glass fibre composite.

8. The dual wind wheel power plant according to claim 1, wherein the power plant is a dual rotor generator, the rotating shaft of the front wind wheel (30) is in driving connection with a first rotor of the dual rotor generator, and the rotating shaft of the rear wind wheel (40) is in driving connection with a second rotor of the dual rotor generator.

9. A double wind wheel power plant according to claim 8, characterized in that the axis of the rotation shaft of the front wind wheel (30) coincides with the axis of the rotation shaft of the rear wind wheel (40).

10. A double wind turbine power plant according to claim 1, characterized in that said installation platform (10) is a hollow concrete tower.

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