CN114738177A

CN114738177A - Double-wind-wheel power generation equipment

Info

Publication number: CN114738177A
Application number: CN202210272625.8A
Authority: CN
Inventors: 李新凯; 郭小江; 唐巍; 叶昭良
Original assignee: Huaneng Clean Energy Research Institute
Current assignee: Huaneng Clean Energy Research Institute
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-07-12

Abstract

The invention provides a double wind wheel power generation device, comprising: the wind power generation system comprises an installation platform (10), a cabin (20), a front wind wheel (30) and a rear wind wheel (40), wherein the cabin (20) is arranged on the installation platform (10), and power generation equipment is arranged in the installation platform (10) or the cabin (20); the front wind wheel (30) is arranged on the engine room (20) and is in transmission connection with the power generation equipment; the rear wind wheel (40) is arranged on the engine room (20) and is in transmission connection with the power generation equipment; the diameter of the front wind wheel (30) is D1, the diameter of the rear wind wheel (40) is D2, and D1 is (1/4-1/3) D2. Two wind wheels are arranged, so that simultaneous power generation can be realized, and the diameter ratio of the front wind wheel and the rear wind wheel can be controlled, so that the influence between the front wind wheel and the rear wind wheel is small, the wind energy is absorbed more fully, and the overall power generation efficiency is improved.

Description

Double-wind-wheel power generation equipment

Technical Field

The invention relates to the technical field of wind power generation, in particular to double-wind-wheel power generation equipment.

Background

Wind energy is increasingly receiving attention as a renewable new energy source due to its advantages of wide source, large storage capacity, no pollution and the like. The electric energy is used as a special carrier of energy and has the characteristics of cleanness, high efficiency, environmental friendliness and the like, so that the great significance of the vigorous development of wind power generation is achieved.

In the related art, a wind turbine is usually mounted on a tower column to generate power, and the wind power generation device in the mode is high in cost and not beneficial to large-scale use. Therefore, the total power generation of all wind power generators in a certain area is smaller than the number of wind power generators.

Therefore, how to improve the average power generation amount of a single wind power generation device in unit time becomes a technical problem to be solved urgently in the field.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an embodiment of the present invention proposes a dual wind turbine power generation apparatus, including:

an installation table;

the engine room is arranged on the mounting platform, and power generation equipment is arranged in the mounting platform or in the engine room; the front wind wheel is arranged on the engine room and is in transmission connection with the power generation equipment; and

the rear wind wheel is arranged on the engine room and is in transmission connection with the power generation equipment;

the diameter of the front wind wheel is D1, the diameter of the rear wind wheel is D2, and D1 is (1/4-1/3) D2.

According to the double-wind-wheel power generation equipment disclosed by the embodiment of the invention, the two wind wheels are arranged, so that the simultaneous power generation can be realized, and the influence between the front wind wheel and the rear wind wheel is smaller by controlling the diameter ratio of the front wind wheel to the rear wind wheel, so that the wind energy is more fully absorbed, and the overall power generation efficiency is improved.

Optionally, the front rotor and the rear rotor are arranged on the same shaft and on the same side of the nacelle.

Optionally, the front wind wheel comprises a plurality of front blades distributed in a circumferential array, and the rear wind wheel comprises a plurality of rear blades distributed in a circumferential array;

the front blades and the rear blades are distributed in a staggered mode on the windward side.

Optionally, the chord length of the front blade gradually increases from the blade root to the blade tip and then gradually decreases; the chord length of the rear blade gradually increases from the blade root to the blade tip and then gradually decreases; the distance between the front wind wheel and the rear wind wheel is 0.25-0.3 times of the diameter of the front wind wheel.

Optionally, the length of the part of the front blade with the gradually increased chord length 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 chord length of the rear blade gradually increasing 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 of the front blade 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 range of the relative chord length of the front blade is 15% -40%;

the chord length of the rear blade is L2, the thickness of the rear blade 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 range of the relative chord length of the rear blade is 15% -40%.

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

Optionally, the number of the front blades is 3, and the number of the rear blades is 3.

Optionally, the mounting platform is a concrete tower.

Optionally, the power generation device is a generator.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

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.

FIG. 1 is a schematic perspective view of a dual wind turbine power plant in accordance with an embodiment of the present invention;

FIG. 2 is a front view of a dual wind turbine power plant in accordance with an embodiment of the present invention;

FIG. 3 is a side view of a dual wind turbine power plant in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of a front blade configuration and a schematic view of a cross-sectional variation of an embodiment of the present invention;

FIG. 5 is a spanwise chord length distribution of a leading blade according to an embodiment of the present invention.

Reference numerals:

10-mounting a platform;

20-a nacelle;

30-front wind wheel; 31-the front leaf;

40-rear wind wheel; 41-rear leaf.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The present embodiment provides a dual wind turbine power generation apparatus that can be used for power generation on water or on land. Specifically, referring to fig. 1-3, a dual wind turbine power plant includes: mounting table 10, nacelle 20, front wind rotor 30 and rear wind rotor 40.

The nacelle 20 is arranged on the mounting platform 10, and power generation equipment is arranged in the mounting platform 10 or the nacelle 20; the front wind wheel 30 is arranged on the engine room 20 and is in transmission connection with the power generation equipment; the rear wind wheel 40 is arranged on the engine room 20 and is in transmission connection with the power generation equipment; the diameter of front wind wheel 30 is D1, and the diameter of back wind wheel 40 is D2, wherein D1 is (1/4-1/3) D2.

According to the scheme, the two wind wheels are arranged, so that simultaneous power generation can be realized, the diameter proportion of the front wind wheel and the rear wind wheel can be controlled, the influence between the front wind wheel and the rear wind wheel is small, the wind energy is absorbed more fully, and the overall power generation efficiency is improved.

The skilled person of the present application has found through experiments that when D1 is less than 1/4D2, or D1 is greater than 1/3D2, the overall efficiency of front wind wheel 30 and rear wind wheel 40 is reduced to some extent.

In some embodiments, front rotor 30 and rear rotor 40 are disposed on the same shaft and on the same side of nacelle 20. Therefore, the wind energy absorbed by the front wind wheel 30 and the rear wind wheel 40 is output through the same rotating shaft, and only one power generation device can be arranged in the installation platform 10 or the nacelle 20. In addition, because the front wind wheel 30 and the rear wind wheel 40 are arranged on the same rotating shaft, the front wind wheel 30 and the rear wind wheel 40 rotate synchronously at the same rotating speed, and the conversion rate of wind energy can be improved compared with the condition that only the front wind wheel 30 or only the rear wind wheel 40 is arranged, so that the rotating speed is improved, and the overall generating efficiency is improved.

In some embodiments, front rotor 30 includes a plurality of front blades 31 distributed in a circumferential array, and rear rotor 40 includes a plurality of rear blades 41 distributed in a circumferential array; the plurality of front blades 31 and the plurality of rear blades 41 are staggered on the windward side. As can be seen from fig. 2, each front blade 31 is located between two rear blades 41, and each rear blade 41 is also located between two front blades 31, and this staggered distribution mode can absorb wind energy to the maximum extent, thereby improving the overall power generation efficiency.

In some embodiments, the chord length of the front blade 31 gradually increases from the blade root to the blade tip and then gradually decreases; the chord length of the rear blade 41 gradually increases from the blade root to the blade tip and then gradually decreases; that is, the front blade 31 and the rear blade 41 are similar in shape and mainly have different sizes, and referring to fig. 5, it can be seen that the relative chord length of the front blade 31 gradually increases first and then gradually decreases, and the increasing speed is faster than the decreasing speed. The structure can ensure the reliability of blade connection and can ensure that each blade can absorb wind energy to the maximum extent.

Wherein, the distance between the front wind wheel 30 and the rear wind wheel 40 is 0.25-0.3 times of the diameter of the front wind wheel 30. Within the range, the front and rear wind wheels have high wind energy conversion capability, and the front wind wheel 30 and the rear wind wheel 40 are installed without interference, so that the installation is convenient.

In some embodiments, the leading blade 31 has a chord length that increases from the root to the tip in a portion 1/7-1/5 of the total length of the leading blade 31; the chord length of the rear blade 41 is 1/7-1/5 of the total length of the rear blade 41 in the most gradually increasing part from the blade root to the blade tip. Fig. 5 also reflects the length range of the gradually increasing part of the chord length of the front blade 31 from the blade root to the blade tip. Within this range, both front rotor 30 and rear rotor 40 have high operating efficiency.

Referring to fig. 4, 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 the leading blades 31 differ at different locations. Referring to fig. 5, it can be seen that the relative chord length of the leading blade 31 gradually increases and then gradually decreases at a higher rate than the decreasing rate. The relative chord length of the leading blade 31 may be 40%, 35%, 30%, 25%, 21%, 18%, 15%, etc.

In some embodiments, 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%. Since the rear blade 41 and the front blade 31 employ the same type of blade, a view of the rear blade 41 is not shown and those skilled in the art can understand with reference to the front blade 31.

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

In some embodiments, front rotor 30 includes 3 front blades 31 and rear rotor 40 includes 3 rear blades 41. That is, the dual wind turbine generator in this embodiment takes the form of 3 blades at the front and rear. The number of blades for front rotor 30 and rear rotor 40 may be increased or decreased as desired.

In some embodiments, the mounting platform 10 is a concrete tower, which may be installed on land to ensure the stability of the mounting platform 10, and a steel bar structure may be installed in the concrete tower to increase the firmness of the concrete tower.

In some embodiments, the power generation device is a generator. The front wind wheel 30 and the rear wind wheel 40 jointly drive the rotating shaft to rotate, and power is transmitted to the generator, so that the generator generates electricity, and electric energy generated by the generator can be merged into a power grid.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A dual wind turbine power plant, comprising:

a mounting table (10);

a nacelle (20), wherein the nacelle (20) is arranged on the installation platform (10), and power generation equipment is arranged in the installation platform (10) or in the nacelle (20);

the front wind wheel (30) is arranged on the cabin (20) and is in transmission connection with the power generation equipment; and

the rear wind wheel (40), the rear wind wheel (40) is arranged on the cabin (20) and is in transmission connection with the power generation equipment;

the diameter of the front wind wheel (30) is D1, the diameter of the rear wind wheel (40) is D2, and D1 is (1/4-1/3) D2.

2. A dual wind turbine power plant according to claim 1, wherein the front wind rotor (30) and the rear wind rotor (40) are arranged on the same shaft and on the same side of the nacelle (20).

3. A dual wind wheel power plant according to claim 1, characterized in that said front wind wheel (30) comprises a plurality of front blades (31) distributed in a circumferential array and said rear wind wheel (40) comprises a plurality of rear blades (41) distributed in a circumferential array;

the front blades (31) and the rear blades (41) are distributed in a staggered manner on the windward side.

4. A twin wind turbine power plant according to claim 3, characterised in that the chord length of the front blade (31) increases and then decreases from the root to the tip; the chord length of the rear blade (41) is gradually increased from the blade root to the blade tip and then gradually decreased; the distance between the front wind wheel (30) and the rear wind wheel (40) is smaller than 0.25-0.3 times of the diameter of the front wind wheel (30).

5. Double wind turbine generator according to claim 4 characterised in that the length of the gradually increasing part of the chord length of the front blade (31) from blade root to 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).

6. The twin wind turbine generator apparatus of claim 4, characterised in that 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, the relative chord length of the front blade (31) ranges from 15% to 40%;

the chord length of the rear blade (41) is L2, the thickness of the rear blade is S2, the L2 and the 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 range of the relative chord length of the rear blade (41) is 15% -40%.

7. Double wind turbine generator according to claim 3 or 4, wherein the thickness of the front blade (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.

8. A double wind turbine generator according to claim 3, wherein said front blades (31) are 3 in number and said rear blades (41) are 3 in number.

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

10. The dual wind turbine generator of claim 1, wherein said power generation device is a generator.