CN221400778U - Wind power generator - Google Patents

Abstract

The utility model relates to a wind driven generator, which comprises a generator support, wherein two or at least three reversing wheels which are horizontally arranged along a rotation axis distributed along the circumferential direction are rotatably arranged on the generator support, a circulating rotating part is arranged on each reversing wheel in a transmission winding way, a plurality of blades which are arranged at intervals along the circumferential direction of the circulating rotating part are arranged on the circulating rotating part, each circulating rotating part comprises an arc-shaped section which is in contact fit with the corresponding reversing wheel and a straight line section which is connected between the two adjacent arc-shaped sections, the two adjacent blades on the straight line section are arranged in parallel, an airflow channel is formed between the two adjacent blades, two side surfaces in the thickness direction of the blades are respectively a first side surface and a second side surface, the first side surface is an arc-shaped side surface, and when airflow flows through the first side surface and the second side surface, the airflow velocity at the first side surface is larger than that of the second side surface enables each blade to apply the same-direction torque to the circulating rotating part. The utility model solves the technical problem of lower wind energy capturing rate of the existing three-blade horizontal axis wind driven generator.

Description

Wind power generator

Technical Field

The utility model relates to the field of wind power generation, in particular to a wind driven generator based on a horizontal shaft.

Background

Wind energy is used as a clean energy source, and the application and popularization of the wind energy have important significance for sustainable development of human society. The performance of the wind driven generator as a device for converting wind energy into electric energy is of great significance for the effective utilization of wind energy.

The wind driven generator in the traditional sense comprises a horizontal axis wind driven generator and a vertical axis wind driven generator, and for the vertical axis wind driven generator, the vertical axis wind driven generator comprises a vertical rotating shaft and a plurality of resistance type blades uniformly distributed at intervals along the circumferential direction of the vertical rotating shaft, when wind passes through the blades, one blade of the vertical rotating shaft can catch wind energy, and the other blade of the other side can be blocked by the wind against the wind. That is, for a vertical axis wind turbine, although it has a high wind energy capturing rate, the wind energy conversion rate is limited, so that the vertical axis wind turbine is suitable for use in a low power, space-limited location.

The wind energy capturing rate refers to the geometric shape formed after the full-size fan blades are swept by windward movement, and the area of the geometric shape forms the windward area; wind passing through the moving blades in the whole windward area does not completely touch the blades or influence the capturing of wind energy by the blades, and the captured wind produces wind power to the blades; (in popular terms, when wind passes through the wind blades moving in the windward area, part of the wind leaks out due to the influence of the wind speed, the shape, the posture and the quantity of the wind blades, and no work is possible), the ratio of the wind quantity captured in the unit windward area to the total quantity of the wind passing through the unit windward area is called a wind energy capturing rate.

In order to improve the power of the generator and fully utilize space resources, the main flow machine types of the three-blade wind driven generator with the horizontal shaft are all high-altitude large impeller structures, the length of blades is 160 meters in order to improve the wind energy capturing rate, the radius of gyration of blade roots is 1.5 meters, and the ratio of the blade tips to the linear velocities of the blade roots is 160/1.5=107.7.

Typically, the rotor diameter is 98 meters, and the rotor speed ranges from 8.34 to 15.73rpm, calculated as 15 rpm: the blade root linear velocity is: the tip linear speed of 2.35m/s is as high as: 76.9m/s, the blade tip linear velocity is 32.7 times the blade root linear velocity. The same blade has the same angular velocity, and the linear velocity difference from the blade root to the blade tip is large, so that the blade root has large aerodynamic property difference.

To summarize briefly, this horizontal axis three-bladed wind turbine has the following problems: although the blade length is long, the wind energy capturing rate of the blade is still low; because the difference of the linear speeds of the radial points of the blades of the large-diameter impeller is so large, the wind speed with larger variation interval is a natural characteristic which is uncontrollable, the radial length local interval of the highest wind energy capture rate is varied, and the wind energy conversion rate is lower than 59.3 percent; the blades with longer length make the manufacturing, installation and operation and maintenance costs of the wind driven generator higher, the turning radius of the whole machine is larger, the supporting rod of the wind driven generator is higher, the generator, the blades and the control electric appliance are installed at high altitude, and the installation and maintenance costs of the generator are very high; in addition, the tip of the fan blade has squeaking sound, so that the damage of lightning and ice and snow is not easy to be reduced.

Disclosure of utility model

The utility model aims to provide a wind driven generator based on a horizontal shaft, which aims to solve the technical problem of low wind energy capturing rate of the existing three-blade horizontal shaft wind driven generator.

In order to solve the technical problems, the technical scheme of the wind driven generator is as follows:

The wind driven generator comprises a generator support, wherein a rotation axis of the generator support extends along the up-down direction, two or at least three reversing wheels horizontally arranged along the rotation axis distributed along the circumferential direction are rotatably assembled on the generator support, a circulating rotating member is arranged on each reversing wheel in a transmission winding way, a generator is connected to a wheel shaft of at least one reversing wheel, a plurality of blades are arranged on the circulating rotating member at intervals along the circumferential direction of the circulating rotating member, the circulating rotating member comprises an arc-shaped section in contact fit with the corresponding reversing wheel and a straight line section connected between two adjacent arc-shaped sections, the two adjacent blades on the straight line section are arranged in parallel, an airflow channel is formed between the two adjacent blades, two side surfaces in the thickness direction of the blades are respectively a first side surface and a second side surface, the first side surface is an arc-shaped side surface, and when airflow flows through the first side surface and the second side surface, the airflow velocity at the first side surface is greater than that of the second side surface enables each blade to apply the same-direction torque to the circulating rotating member.

Further, the length of the blade is 0.3 m-10 m.

Further, the cross section of the blade perpendicular to the length direction of the blade is of a uniform cross section structure.

Further, any two adjacent blades are arranged at equal intervals.

Further, the second side is of an arc surface structure consistent with the protruding direction of the first side, and the middle thickness of the blade is larger than the thickness of the two ends of the width direction of the blade.

Further, the length direction of the blades is consistent with or perpendicular to the extending direction of the axis of the reversing wheel.

Further, the width direction of the blade is consistent with the airflow direction, the length of the blade is larger than the width of the blade, and the width of the blade is larger than the maximum thickness of the blade.

Further, the length direction of the blades is consistent with the axial extension direction of the reversing wheels, the reversing wheels are three, the circulating rotating pieces are distributed in a right triangle with each reversing wheel as a vertex, and the straight line segments comprise a windward straight line segment on the windward side, a leeward straight line segment on the leeward side and a horizontal straight line segment which is horizontally arranged, and the length of the windward straight line segment is greater than that of the horizontal straight line segment.

Further, the generator support comprises a wind scooper, the reversing wheel is rotationally assembled on the inner wall of the wind scooper, the inner cavity of the wind scooper forms a wind scooper wind guide channel consistent with the trend of the airflow, and each blade is positioned in the wind scooper wind guide channel.

Further, the length direction of the blades is perpendicular to the extending direction of the axis of the reversing wheel, the number of the reversing wheels is at least two, and each blade is positioned on the same side in the windward direction.

The beneficial effects of the utility model are as follows: in the utility model, when the airflow flows through the first side surface and the second side surface of the blade, the airflow velocity at the first side surface is larger than the airflow velocity at the second side surface, so that each blade generates a 'lift force' generated by the action of the airflow, and meanwhile, due to the reversing of the reversing wheel, each blade applies the same-direction torque to the circulating rotating piece, the acting force of each blade is concentrated to the circulating rotating piece, and the power generation is realized through the action of the reversing wheel.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to like or corresponding parts and in which:

FIG. 1 is a schematic view of a wind turbine according to embodiment 1 of the present utility model;

FIG. 2 is a schematic illustration of the mating of the endless rotating member, reversing wheel, and vanes of FIG. 1;

Fig. 3 is an enlarged view at a in fig. 1;

FIG. 4 is a schematic view of a wind turbine according to embodiment 2 of the present utility model;

FIG. 5 is a left side view of the vane of the left straight line segment of FIG. 4;

FIG. 6 is a left side view of the vane of the right hand straight line segment of FIG. 4;

FIG. 7 is a schematic view showing a structure of an embodiment 3 of a wind power generator according to the present utility model;

FIG. 8 is a schematic view showing a structure of an embodiment 4 of a wind turbine according to the present invention;

Reference numerals illustrate: 1. a wind scooper; 2. the wind guide cover is provided with a wind guide channel; 3. a left reversing wheel; 4. a right reversing wheel; 5. a left side circulation rotating member; 6. a right side circulation rotating member; 7. a blade; 8. an air flow channel; 9. a generator; 10. adjusting the rotating shaft; 11. a rotating shaft gear; 12. a motor shaft gear; 13. a wind direction adjusting motor; 14. a first reversing wheel; 15. a second reversing wheel; 16. a third reversing wheel; 17. an arc section; 18. a windward straight line segment; 19. lee straight line segment; 20. a horizontal straight line segment; 21. a second side; 22. a first side; 23. an upper reversing wheel; 24. a lower reversing wheel; 25. a circulating rotary member; 26. a left straight line segment; 27. right straight line segment; 28. an upper straight line segment; 29. a lower straight line segment; 30. and a reversing wheel.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Embodiment 1 of a wind power generator in the present utility model is shown in fig. 1 to 3:

The wind-driven generator comprises a generator support with a rotation axis extending along the up-down direction, wherein the generator support comprises a wind scooper 1, the wind scooper 1 is provided with an inner cavity penetrating through the wind scooper along the front-back direction, and the inner cavity of the wind scooper forms a wind scooper wind guide channel 2 for air flow passing through from front to back. The generator support further comprises an adjusting rotating shaft 10 which is fixed at the lower end of the wind scooper and extends along the vertical direction, the adjusting rotating shaft 10 is rotatably assembled on a corresponding support (not shown in the figure), a rotating shaft gear 11 is fixed on the adjusting rotating shaft, the wind driven generator further comprises a wind direction adjusting motor 13, and a motor shaft gear 12 which is meshed with the rotating shaft gear and is driven is fixed on a motor shaft of the wind direction adjusting motor 13. When the wind guiding device is used, the wind direction adjusting motor 13 can adjust the direction of the wind guiding cover according to the wind direction, so that the wind guiding cover guiding channel 2 is ensured to be consistent with the wind direction.

The wind scooper is rotatably provided with three reversing wheels which are horizontally arranged along the rotation axis distributed along the circumferential direction, in the embodiment, the three reversing wheels are distributed at three vertexes of a right triangle, the reversing wheels are driven to pass through a circulating rotating piece, and one reversing wheel is connected with a generator 9. In this embodiment, the three reversing wheels are a first reversing wheel 14, a second reversing wheel 15 and a third reversing wheel 16 respectively, each reversing wheel comprises a left reversing wheel 3 and a right reversing wheel 4 which are arranged at left and right intervals, the left reversing wheel 3 and the right reversing wheel 4 are respectively rotatably assembled on the inner wall of the wind scooper, the circulating rotating member comprises a left circulating rotating member 5 in transmission connection with each left reversing wheel and a right circulating rotating member 6 in transmission connection with each right reversing wheel, the left reversing wheel and the right reversing wheel are sprockets, the left circulating rotating member and the right circulating rotating member are chains, and in other embodiments of the present utility model, the left circulating rotating member and the right circulating rotating member can also be circulating belts.

The circulating rotating member is provided with a plurality of blades 7 which are arranged at intervals along the circumferential direction of the circulating rotating member, the left end of each blade 7 is fixedly connected with the left circulating rotating member 5, and the right end of each blade 7 is fixedly connected with the right circulating rotating member 6. The circulating rotating member comprises an arc-shaped section 17 in contact fit with the corresponding reversing wheel and a straight line section connected between the two adjacent arc-shaped sections, two adjacent blades on the straight line section are arranged in parallel, an airflow channel is formed between the two adjacent blades, two side surfaces in the thickness direction of the blades are a first side surface 22 and a second side surface 21 respectively, the first side surface 22 is an arc-shaped side surface, and when airflow flows through the first side surface and the second side surface, the airflow velocity at the first side surface is greater than that at the second side surface, so that the blades apply the same-direction torque to the circulating rotating member.

In the utility model, the length of each blade, namely the dimension in the left-right direction is 0.3 m-10 m, and any two adjacent blades are arranged at equal intervals, and an airflow channel 8 is formed between the two adjacent blades. The cross section of the blade perpendicular to the length direction of the blade is of a uniform cross section structure, as shown in fig. 3, the blade is of a hollow structure, and the material of the blade can be alloy or glass fiber reinforced plastic.

The second side 21 is an arc surface structure in line with the convex direction of the first side, and the length of the first side is longer than that of the side in the front-rear direction, so that when the air flows through the first side and the second side, a higher flow velocity is formed at the first side, and the blade generates a lifting force moving toward the first side.

The thickness of the middle of the blade is larger than the thickness of the two ends of the width direction of the blade. In this embodiment, the length of the blade, i.e., the left-right direction, coincides with the direction in which the axis of the reverser wheel extends. The width of the blade, namely the front-back direction is consistent with the airflow direction, the length of the blade is larger than the width of the blade, and the width of the blade is larger than the maximum thickness of the blade.

Because the reversing wheels are distributed at three vertexes of a right triangle, the circulating rotating piece is distributed at the right triangle with each reversing wheel as the vertex, the straight line section comprises a windward straight line section 18 on the windward side, a leeward straight line section 19 on the leeward side and a horizontal straight line section 20, the windward straight line section 18 is positioned between the first reversing wheel 14 and the third reversing wheel 16, the leeward straight line section 19 is positioned between the first reversing wheel 14 and the second reversing wheel 15, and the horizontal straight line section 20 is positioned between the second reversing wheel and the third reversing wheel.

The windward straight line segment and the horizontal straight line segment are positioned on two right-angle sides of the right triangle, and the length of the windward straight line segment is longer than that of the horizontal straight line segment, so that the number of the blades on the horizontal straight line segment is minimum, and a plurality of blades are arranged on the windward straight line segment, the horizontal straight line segment and the horizontal straight line segment. In the front-back direction, each blade on the leeward straight line segment is respectively positioned between two adjacent corresponding blades on the windward straight line segment, so that the wind energy capturing rate is further improved. In the utility model, the leeward straight line segment is a hypotenuse of the right triangle, so that the lift angle of the blade on the leeward straight line segment is different from that on the windward straight line segment, which is more beneficial to the utilization of wind energy by the blade on the leeward straight line segment, and the lift angle of the blade on the leeward straight line segment can be adjusted by adjusting the interval between the second reversing wheel and the third reversing wheel.

The arrow direction in fig. 2 indicates the direction, when the air current flows through the blades on the windward straight line section and the leeward straight line section, a large number of blades ensure the wind energy capturing rate, and for the blades on the windward straight line section, the circulating rotating member has a counterclockwise rotation trend under the action of wind energy, and through the reversing of the first reversing wheel, the first side of the blades faces downwards on the leeward straight line section, so that when the air current flows through the blades on the leeward straight line section, the blades on the leeward straight line section also have a counterclockwise rotation trend, and the circulating rotating member rotates under the combined action of the blades, and the power is finally transmitted to the generator through the third reversing wheel to generate electricity. According to the utility model, the left side circulating rotating piece and the right side circulating rotating piece are fixed at two ends of the blade, so that the blade can adopt a uniform cross-section structure, the manufacture is simple, the performance is excellent, and because more blades are used for guaranteeing the wind energy capturing rate, the length of the blade is not required to be too long, the manufacture difficulty and the manufacture cost of the blade are reduced, and the transportation and the installation of products are convenient.

Embodiment 2 of the wind power generator is as shown in fig. 4 to 6: in this embodiment, there are two reversing wheels, namely an upper reversing wheel 23 and a lower reversing wheel 24, and the generator is in transmission connection with the lower reversing wheel.

The circulating rotating member in this embodiment is wound around the upper reversing wheel and the lower reversing wheel in a transmission manner, and a plurality of blades are fixed on the circulating rotating member and are arranged at intervals along the circumferential direction of the circulating rotating member, and the structure of the blades is the same as that of the blades in embodiment 1 of the wind driven generator. Unlike embodiment 1, in this embodiment, the length direction of the blades is perpendicular to the axial direction of the reverser wheel, which coincides with the airflow direction.

The circulating rotating member comprises an arc-shaped section in contact fit with the upper reversing wheel and the lower reversing wheel, a left straight-line section 26 and a right straight-line section 27 which are positioned between the upper reversing wheel and the lower reversing wheel, blades on the arc-shaped section are distributed in a radial mode by taking the axis of the corresponding reversing wheel as the center, two adjacent blades on the left straight-line section are arranged in parallel at intervals, two adjacent blades on the right straight-line section are arranged in parallel at intervals, the circulating rotating member can be a chain, and the middle parts of the blades are fixed on the circulating rotating member. The first side 22 of the blade on the right straight line segment faces upwards, the second side 21 faces downwards, the first side 22 of the blade on the left straight line segment faces downwards after reversing by the corresponding reversing wheel, the second side 21 faces upwards, that is, the blades on the left straight line segment and the right straight line segment are all on the windward side, no part is needed, when the air flow blows through the blades on the left straight line segment and the right straight line segment, the blades on the right straight line segment generate upward acting force, the blades on the left straight line segment generate downward acting force, so that the circulating rotating part is driven to rotate anticlockwise according to the view angle of fig. 4, and the circulating rotating part drives the upper reversing wheel and the lower reversing wheel to rotate, thereby realizing the power generation of the generator and converting wind energy into electric energy.

Embodiment 3 of the wind power generator is shown in fig. 7: embodiment 3 differs from embodiment 2 in that two reversing wheels 30 are arranged side by side, and the endless rotating member 25 includes an upper straight line segment 28 and a lower straight line segment 29 between the two reversing wheels, and the vanes 7 on the upper and lower straight line segments are arranged vertically.

Embodiment 4 of the wind power generator as shown in fig. 8, embodiment 4 is different from embodiment 2 in that four reversing wheels 30 are shared in this embodiment, the four reversing wheels 30 are distributed at four corners of a rectangle, and the circulating rotating member 25 has a rectangular structure.

In the foregoing description of the present specification, the terms "fixed," "mounted," "connected," or "connected" are to be construed broadly, unless explicitly stated or limited otherwise. For example, in terms of the term "coupled," it may be fixedly coupled, detachably coupled, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other. Therefore, unless otherwise specifically defined in the specification, a person skilled in the art can understand the specific meaning of the above terms in the present utility model according to the specific circumstances.

Those skilled in the art will also appreciate from the foregoing description that terms such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise" and the like are used herein for the purpose of facilitating description and simplifying the description of the present utility model, and thus do not necessarily have to have, configure, or operate in, the specific orientations, and thus are not to be construed or construed as limiting the present utility model.

In addition, the terms "first" or "second" and the like used in the present specification to refer to the numbers or ordinal numbers are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present specification, the meaning of "plurality" means at least two, for example, two, three or more, etc., unless explicitly defined otherwise.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (9)

1. A wind power generator, characterized in that: the device comprises a generator support, wherein a rotation axis extends along the up-down direction, two or at least three reversing wheels horizontally arranged along the rotation axis distributed along the circumferential direction are rotatably assembled on the generator support, a circulating rotating member is arranged on each reversing wheel in a transmission winding way, a generator is connected to a wheel shaft of at least one reversing wheel, a plurality of blades are arranged on the circulating rotating member at intervals along the circumferential direction of the circulating rotating member, each circulating rotating member comprises an arc-shaped section in contact fit with the corresponding reversing wheel and a straight line section connected between two adjacent arc-shaped sections, the two adjacent blades on the straight line section are arranged in parallel, an airflow channel is formed between the two adjacent blades, the two side surfaces in the thickness direction of each blade are respectively a first side surface and a second side surface, the first side surface is an arc-shaped side surface, and when airflow flows through the first side surface and the second side surface, the airflow velocity at the first side surface is larger than that of the second side surface, so that each blade applies the same-direction torque to the circulating rotating member.

2. A wind power generator as claimed in claim 1, wherein: the cross section of the blade perpendicular to the length direction of the blade is of a uniform cross section structure.

3. A wind power generator as claimed in claim 1, wherein: and any two adjacent blades are arranged at equal intervals.

4. A wind power generator as claimed in claim 1, wherein: the second side is the cambered surface structure consistent with the protruding direction of the first side, and the middle thickness of the blade is greater than the thickness at two ends of the width direction of the blade.

5. The wind power generator according to any one of claims 1 to 4, wherein: the length direction of the blade is consistent with or perpendicular to the extending direction of the axis of the reversing wheel.

6. A wind power generator as claimed in claim 1, wherein: the width direction of the blade is consistent with the airflow direction, the length of the blade is larger than the width of the blade, and the width of the blade is larger than the maximum thickness of the blade.

7. The wind power generator as claimed in claim 5, wherein: the length direction of the blades is consistent with the axis extending direction of the reversing wheels, the reversing wheels are three, the circulating rotating pieces are distributed in a right triangle with each reversing wheel as a vertex, and the straight line segments comprise a windward straight line segment on the windward side, a leeward straight line segment on the leeward side and a horizontal straight line segment which is horizontally arranged, and the length of the windward straight line segment is greater than that of the horizontal straight line segment.

8. The wind power generator as claimed in claim 7, wherein: the generator support comprises a wind scooper, the reversing wheel is rotationally assembled on the inner wall of the wind scooper, the inner cavity of the wind scooper forms a wind scooper wind guide channel consistent with the trend of the air flow, and each blade is positioned in the wind scooper wind guide channel.

9. The wind power generator as claimed in claim 5, wherein: the length direction of the blades is perpendicular to the axis extending direction of the reversing wheels, the number of the reversing wheels is at least two, and each blade is positioned on the same side in the windward direction.