CN217421414U - Vertical axis wind turbine impeller easy to start and high in wind energy utilization rate - Google Patents
Vertical axis wind turbine impeller easy to start and high in wind energy utilization rate Download PDFInfo
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- CN217421414U CN217421414U CN202220755281.1U CN202220755281U CN217421414U CN 217421414 U CN217421414 U CN 217421414U CN 202220755281 U CN202220755281 U CN 202220755281U CN 217421414 U CN217421414 U CN 217421414U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
Abstract
The utility model discloses a start vertical axis aerogenerator impeller that easy wind energy utilization is high, locate including impeller skeleton and perpendicularly a plurality of deformable impeller subassemblies of impeller skeleton, the circumferencial direction equidistance setting along impeller skeleton respectively of deformable impeller subassembly, the deformable impeller subassembly can drive the impeller skeleton when receiving the air current effect and realize rotating. When the utility model is started under the action of air flow, the fixed blades and the expandable blades form a certain included angle under the elastic force of the reset elastic piece, so as to increase the wind-receiving area of the variable impeller component to improve the wind-catching capacity, thereby improving the self-starting performance of the wind driven generator; when the rotating speed is increased, the centrifugal force borne by the variable impeller assembly is increased, so that the elastic force of the reset elastic piece is overcome, the openable blades are driven to close and approach to the fixed blades, the resistance is reduced, the utilization rate of wind energy is improved, and the output power and the generating efficiency of the wind driven generator are increased.
Description
Technical Field
The utility model relates to a aerogenerator field especially relates to a vertical axis aerogenerator impeller that wind energy utilization is high easily starts.
Background
With the establishment of the targets of carbon peak reaching and carbon neutralization, the development of new energy is highly emphasized in all countries in the world, and the development of new energy is used as a national strategy for getting rid of energy dependence and realizing energy autonomy in China. Wind energy resources are not polluted, renewable, rich in resources and widely distributed, so that the wind energy resources attract attention of all countries in the world and are invested with huge resources for development. Compared with other energy sources, the wind energy has the advantages of huge accumulated amount, regeneration, wide distribution, no pollution and the like, so that the wind energy has stronger advantages in technology and cost, and becomes one of the most ideal renewable clean energy sources at present. Therefore, wind power generation becomes the focus of the current society, and the superiority can be summarized into three points: firstly, in terms of economic cost, the cost for building a wind power plant is much lower than that of a thermal power plant or a nuclear power plant of a water power plant; secondly, the operating cost of wind power generation is free of any other consumption and fuel cost except for conventional maintenance; again, wind energy is a clean renewable energy source. The wind power generation not only effectively utilizes natural resources, but also protects the natural environment, and also solves the problem of urgent shortage of electricity for people in remote areas. Therefore, the investment cost of wind energy development and utilization projects of various countries is continuously increased, and the wind power generation industry has unprecedented development potential.
China also uses wind energy in the early century, the development momentum of the wind power industry in China is particularly strong in recent years, the installed capacity exceeds the United states, and the wind power industry goes ahead of the world. Currently used wind power generators are mainly divided into a horizontal axis wind power generator and a vertical axis wind power generator. In a wind farm, a wind turbine is an important device for converting wind energy into electric energy. Compared with a horizontal axis wind turbine, the vertical axis wind turbine and other related mechanical components are not required to be installed on the high tower top like a horizontal axis wind turbine, can be installed at a low position, and is convenient to install and maintain. The wind direction is not needed during operation, the wind energy in all directions can be directly utilized, and the whole structure is simpler and more reliable; the small vertical axis wind driven generator is also suitable for multi-building areas, can effectively utilize building wind energy, and reduces the consumption of primary energy; at the same time, one of the biggest advantages is that the cost of vertical axis wind turbines is generally low compared to the cost of horizontal axis wind turbines. In the prior art, referring to fig. 9, although a lift-type impeller of a conventional wind power generator has high wind energy conversion efficiency, the lift-type impeller does not have good self-starting performance, so that the energy of small airflow is not fully utilized, and resources are wasted; in addition, referring to fig. 10, although the resistance-type impeller has good starting performance, the conversion efficiency of the resistance-type impeller to wind energy is low, and in high-speed operation, the windward side of the resistance-type impeller generates large resistance, thereby affecting the output power of the wind power generator; referring to fig. 11, the hybrid impeller still has a large resistance, so that the rotation speed is difficult to increase, and the conversion efficiency of wind energy is low.
Accordingly, the prior art is deficient and needs improvement.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the impeller of the vertical axis wind driven generator is low in maintenance cost, avoids wind energy waste, is easy to start, and is high in wind energy utilization rate.
The technical scheme of the utility model as follows: a vertical axis wind turbine impeller easy to start and high in wind energy utilization rate comprises an impeller framework and a plurality of variable impeller assemblies vertically arranged on the impeller framework, wherein the variable impeller assemblies are respectively arranged at equal intervals along the circumferential direction of the impeller framework, and the variable impeller assemblies can drive the impeller framework to rotate when being acted by airflow;
the variable impeller assembly comprises fixed blades, expandable blades, a connecting shaft, a limiting device and a plurality of reset elastic pieces, wherein the side ends of the expandable blades are movably connected with the fixed blades through the connecting shaft, the connecting shaft is sleeved with the plurality of reset elastic pieces, one ends of the reset elastic pieces are connected with the fixed blades, the other ends of the reset elastic pieces are connected with the expandable blades, and the expandable blades are abutted against the limiting device under the elastic force action of the reset elastic pieces to realize limiting and fixing;
a first included angle is formed between a path formed by the center of the impeller framework through the middle point of the connecting shaft and the radial axis of the fixed blade, the angle of the first included angle is 65-85 degrees, when the variable impeller assembly is not under the action of airflow and is in a static state, a second included angle is formed between the fixed blade and the openable blade under the elastic action of the reset elastic piece, the angle of the second included angle is 45-65 degrees, when the variable impeller assembly is under the action of airflow and rotates, the centrifugal force applied to the openable blade can overcome the elastic force of the reset elastic piece, and the openable blade is enabled to be closed and close to the fixed blade.
By adopting the technical scheme, in the vertical axis wind driven generator impeller which is easy to start and high in wind energy utilization rate, the impeller framework is of a circular structure, the center of the impeller framework is vertically provided with the central rotating shaft, and the radius of the impeller framework is formed by the center of the impeller framework passing through the middle point of the connecting shaft.
By adopting the technical scheme, in the vertical axis wind driven generator impeller which is easy to start and high in wind energy utilization rate, the number of the variable impeller assemblies is three, and the included angles between two adjacent groups of the variable impeller assemblies are 120 degrees.
By adopting the technical scheme, in the vertical axis wind driven generator impeller which is easy to start and high in wind energy utilization rate, the angle of the first included angle is 70-80 degrees.
By adopting the technical scheme, the impeller of the vertical axis wind driven generator easy to start and high in wind energy utilization rate is characterized in that a third included angle is formed between a path formed by the center of the impeller framework passing through the midpoint of the connecting shaft and the radial axis of the openable blade, and the angle of the third included angle is 10-30 degrees.
By adopting the technical scheme, the impeller of the vertical axis wind driven generator which is easy to start and high in wind energy utilization rate comprises an impeller framework and a top cover, wherein the top cover is positioned above a base, and the base is connected with the top cover through fixed blades.
By adopting the technical scheme, in the vertical axis wind driven generator impeller which is easy to start and high in wind energy utilization rate, the ratio of the length of the radial axis of the fixed blade to the diameter of the base is 1: 3.
By adopting the technical scheme, in the vertical axis wind driven generator impeller which is easy to start and high in wind energy utilization rate, the height of the fixed blade is greater than that of the expandable blade.
By adopting the technical scheme, in the vertical axis wind driven generator impeller which is easy to start and high in wind energy utilization rate, the fixed blades and the expandable blades are respectively provided with a plurality of reinforcing ribs arranged at intervals, when the expandable blades are closed and close to the fixed blades, the reinforcing ribs on the fixed blades and the expandable blades are arranged in a staggered mode.
By adopting the technical scheme, in the vertical axis wind driven generator impeller which is easy to start and high in wind energy utilization rate, the impeller framework can be connected with a rotor of an external generator set, so that a wind driven generator is formed.
Compared with the prior art, when the variable impeller assembly is started under the action of air flow, the fixed blades and the expandable blades form a certain included angle under the elastic force action of the reset elastic piece, so that the wind catching capacity is improved by increasing the wind area of the variable impeller assembly, the self-starting performance of the wind driven generator is improved, and the effective utilization of small air flow energy is ensured; when the rotating speed is increased, the centrifugal force borne by the openable blades in the variable impeller assembly is increased, so that the elastic force of the reset elastic piece is overcome, the openable blades are enabled to be closed and close to the fixed blades, the wind area is reduced, the resistance borne by the variable impeller assembly in a high-speed rotating state is reduced, the utilization rate of wind energy is improved, and the output power and the power generation efficiency of the wind driven generator are increased; the impeller structure form that the overall structure is simple, the resistance type that is complicated relatively combines with the lift type has the easy-to-wear spare few, beneficial effect such as maintenance cost low.
Drawings
FIG. 1 is a schematic view of the overall structure of the blade in the open state of the present invention;
FIG. 2 is a schematic view of the explosion structure of the blade in the opened state of the present invention;
FIG. 3 is a schematic diagram of the closed-state explosion structure of the blade of the present invention;
fig. 4 is a schematic view of an angle layout of a variable impeller assembly according to embodiment 1 of the present invention;
fig. 5 is a schematic view of an angle layout of a variable impeller assembly according to embodiment 2 of the present invention;
fig. 6 is a schematic view of an angle layout of a variable impeller assembly according to embodiment 3 of the present invention;
fig. 7 is a schematic view of an angular layout of a variable impeller assembly according to embodiment 4 of the present invention;
fig. 8 is a schematic view of the angle layout of the variable impeller assembly of comparative example 1 of the present invention;
FIG. 9 is a schematic view of a prior art lift-type impeller configuration;
FIG. 10 is a schematic view of a prior art drag type impeller configuration;
fig. 11 is a schematic view of a hybrid impeller according to the prior art.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1
As shown in fig. 1 to 4, a vertical axis wind turbine impeller with easy start and high wind energy utilization rate comprises an impeller framework 1 and a plurality of variable impeller assemblies 3 vertically arranged on the impeller framework 1, wherein the variable impeller assemblies 3 are respectively arranged at equal intervals along the circumferential direction of the impeller framework 1, and the variable impeller assemblies 3 can drive the impeller framework 1 to rotate when being acted by air flow. In this embodiment, the impeller frame 1 may be connected to a rotor of an external power generator set, thereby forming a wind power generator, and when the variable impeller assembly 3 is in a wind-receiving state, the variable impeller frame 1 may be driven to rotate to realize power generation.
The variable impeller assembly 3 comprises fixed blades 31, expandable blades 32, a connecting shaft 33, a limiting device 34 and a plurality of elastic resetting pieces 35, the side ends of the expandable blades 32 are movably connected with the fixed blades 31 through the connecting shaft 33, the connecting shaft 33 is sleeved with the elastic resetting pieces 35, one end of each elastic resetting piece 35 is connected with the fixed blades 31, the other end of each elastic resetting piece 35 is connected with the expandable blade 32, and under the elastic force action of the elastic resetting pieces 35, the expandable blades 32 are abutted against the limiting device 34 to achieve limiting and fixing.
A first included angle alpha 1 is formed between a path formed by the center of the impeller framework 1 through the middle point of the connecting shaft 33 and the radial axis of the fixed blade 31, the angle of the first included angle alpha 1 is 65-85 degrees, when the variable impeller assembly 3 is not under the action of airflow and is in a static state, a second included angle alpha 2 is formed between the fixed blade 31 and the expandable blade 32 under the action of the elastic force of the reset elastic piece 35, the angle of the second included angle alpha 2 is 50 degrees, when the variable impeller assembly 3 rotates under the action of airflow, the centrifugal force applied to the expandable blade 32 can overcome the elastic force of the reset elastic piece 35, and the expandable blade 32 is enabled to be closed and close to the fixed blade 31. In this embodiment, the angle of the first included angle α 1 is 75 °, and when the variable impeller assembly 3 is started under the action of the airflow, the fixed blade 31 and the expandable blade 32 form a second included angle α 2 of 50 ° under the elastic force of the return elastic member 35, so as to improve the wind catching capability by increasing the wind receiving area of the variable impeller assembly 3, thereby improving the self-starting performance of the wind power generator and ensuring effective utilization of the energy of the small airflow; when the rotating speed is increased, the centrifugal force applied to the expandable blades 32 in the variable impeller assembly 3 is increased, so that the elastic force of the reset elastic piece 35 is overcome, the expandable blades 32 are urged to close and approach the fixed blades 31, the wind area is reduced, the resistance applied to the variable impeller assembly 3 in a high-speed rotating state is reduced, the utilization rate of wind energy is improved, and the output power and the power generation efficiency of the wind driven generator are increased.
Further, impeller skeleton 1 is circular structure, the 1 centre of a circle of impeller skeleton is equipped with central rotation axis 2 perpendicularly, the route that impeller skeleton 1 center formed through the connecting axle 33 mid point is impeller skeleton 1's radius.
Furthermore, the number of the variable impeller assemblies 3 is three, and the included angles between two adjacent variable impeller assemblies 3 are 120 °.
Further, a third included angle α 3 is formed between a path formed by the center of the impeller framework 1 passing through the midpoint of the connecting shaft and a radial axis of the expandable blade 32, and the angle of the third included angle α 3 is 25 °.
Further, impeller skeleton 1 is including base 11 and being located top cap 12 of base 11 top, be connected through fixed blade 31 between base 11 and the top cap 12.
Further, the ratio of the length of the radial axis of the fixed blade 31 to the diameter of the base 11 is 1: 3. In this embodiment, the ratio of the radial axis length of the fixed blade 31 to the diameter of the base 11 is set to 1:3, so that the conversion and utilization efficiency of the fixed blade 31 to wind energy can be improved.
Further, the height of the fixed blades 31 is greater than the height of the expandable blades 32. In this embodiment, the base 11 and the top cover 12 are connected by the fixed blade 31, that is, the distance between the base 11 and the top cover 12 is the height of the fixed blade 31, and the height of the openable blade 32 is set to be smaller than the height of the fixed blade 31, so as to ensure that the openable blade 32 can smoothly perform the closing and opening operations around the connecting shaft 33.
Further, a plurality of reinforcing ribs (not shown) are respectively arranged on the fixed blade 31 and the expandable blade 32 at intervals, and when the expandable blade 32 is closed and closed on the fixed blade 31, the reinforcing ribs on the fixed blade 31 and the expandable blade 32 are arranged in a staggered manner. In this embodiment, the reinforcing ribs are provided to improve the overall structural strength of the fixed blades 31 and the expandable blades 32.
The resistance type impeller, the lift type impeller and the mixed impeller in the embodiment 1 and the market are respectively connected with a generator at the same wind speed for carrying out an output voltage performance test, and the results are shown in the following table 1:
table 1 output voltage performance test results
The resistance type impeller, the lift type impeller and the mixed type impeller in the embodiment 1 and the market are respectively connected with a generator to carry out the performance test of the starting wind speed, and the results are shown in the following table 2:
TABLE 2 Start-Up wind speed Performance test results
| Type (B) | Resistance type impeller | Mixed impeller | Variable impeller | Lift type impeller |
| Starting wind speed | 4.2m/s | 5.6m/s | 5.6m/s | 10.5m/s |
| As a result, the | Can be started | Can be started | Can be started | Can not start |
As can be seen from the above tables 1 and 2, compared to the conventional resistance-type impeller and the conventional hybrid-type impeller, the variable-type impeller assembly 3 of the present embodiment can generate a higher output voltage under the same airflow condition, and has a higher conversion utilization rate of wind energy, although the conversion efficiency is lower than that of the lift-type impeller; however, the lift-type impeller is difficult to start, and cannot be smoothly started only by increasing the wind speed, and generally needs external force for auxiliary starting, for example, the wind wheel is started by a motor or added with resistance, so that the self-starting performance is poor; more than the above, the wind energy utilization rate and the self-starting performance of the variable impeller component 3 are better, and the wind power generation requirements of China at the present stage are met.
Example 2
As shown in fig. 5, the vertical axis wind turbine impeller of the present embodiment 2, which is easy to start and has a high wind energy utilization rate, is different from the embodiment 1 in that the angle of the second included angle α 2 is 55 °, and the angle of the third included angle α 3 is 20 °.
Example 3
As shown in fig. 6, the vertical axis wind turbine impeller of the present embodiment 3, which is easy to start and has a high wind energy utilization rate, is different from the embodiment 1 in that the second included angle α 2 is 65 °, and the third included angle α 3 is 10 °
Example 4
As shown in fig. 7, the vertical axis wind turbine impeller of the present embodiment 4, which is easy to start and has a high wind energy utilization rate, is different from the embodiment 1 in that the second included angle α 2 is 45 °, and the third included angle α 3 is 30 °
Comparative example 1
As shown in fig. 8, the vertical axis wind turbine impeller of comparative example 1, which is easy to start and has a high wind energy utilization rate, is different from example 1 in that the second angle α 2 is 70 °, and the third angle α 3 is 5 °
Comparative example 2
The vertical axis wind turbine impeller which is easy to start and high in wind energy utilization rate and is described in the comparative example 2 is different from the impeller in the example 1 in that the first included angle α 1 is 85 degrees, the second included angle α 2 is 55 degrees, and the third included angle α 3 is 30 degrees.
Comparative example 3
The vertical axis wind turbine impeller which is easy to start and high in wind energy utilization rate and is described in the comparative example 3 is different from the impeller in the example 1 in that the first included angle α 1 is 65 °, the second included angle α 2 is 45 °, and the third included angle α 3 is 20 °.
Comparative example 4
The vertical axis wind turbine impeller of comparative example 4, which is easy to start and has a high wind energy utilization rate, is different from example 1 in that the ratio of the radial axis length of the fixed blade 31 to the diameter of the base 11 is 1: 4.
The vertical axis wind turbine impeller of comparative example 5, which is easy to start and has a high wind energy utilization rate, is different from example 1 in that the ratio of the radial axis length of the fixed blade 31 to the diameter of the base 11 is 1: 2.
The vertical axis wind turbine impellers of examples 1 to 4 and comparative examples 1 to 3 which are easy to start and high in wind energy utilization rate were subjected to a starting performance test, and the results are shown in the following table 3:
| item | First included angle | Second included angle | Third included angle | Starting situation | Starting wind speed | Output voltage |
| Example 1 | 75° | 50° | 25° | Is normal | 5.6m/s | 1415mV |
| Example 2 | 75° | 55° | 20° | Is normal | 6.2m/s | 1360mV |
| Example 3 | 75° | 65° | 10° | Is normal | 6.6m/s | 1390mV |
| Example 4 | 75° | 45° | 30° | Is normal | 6.8m/s | 1430mV |
| Comparative example 1 | 75° | 70° | 5° | Blade reversal | / | / |
| Comparative example 2 | 85° | 55° | 30° | Blade reversal | / | / |
| Comparative example 3 | 65° | 45° | 20° | Blade reversal | / | / |
As can be seen from table 3 above, it is preferable that the first included angle α 1 of the variable impeller assembly 3 is 75 °, and when the angle of the first included angle α 1 is greater than 80 ° or less than 70 °, the normal operation of the variable impeller assembly 3 is affected, and the vane may be reversely rotated; meanwhile, even if the first included angle α 1 is 75 °, the second included angle α 2 is 70 °, and the third included angle α 3 is 5 °, the blade is also rotated reversely; when the first included angle α 1 is 75 °, the second included angle α 2 is 50 °, and the third included angle α 3 is 25 °, the requirement of the starting wind speed of the variable impeller assembly 3 is the lowest, and the output voltage is higher, which is the most preferable parameter.
In addition, the vertical axis wind turbine impellers which are easy to start and high in wind energy utilization rate in the embodiment 1 and the comparative examples 4 to 5 are respectively connected with a generator to perform an output power performance test, and the results are shown in the following table 4:
as can be seen from table 4 above, the variable impeller assembly 3 has a higher wind energy conversion efficiency when the ratio of the radial axis length of the fixed blades 31 to the diameter of the base 11 is 1: 3.
Compared with the prior art, when the variable impeller assembly is started under the action of air flow, the fixed blades and the expandable blades form a certain included angle under the elastic force action of the reset elastic piece, so that the wind catching capacity is improved by increasing the wind area of the variable impeller assembly, the self-starting performance of the wind driven generator is improved, and the effective utilization of small air flow energy is ensured; when the rotating speed is increased, the centrifugal force applied to the expandable blades in the variable impeller assembly is increased, so that the elastic force of the reset elastic piece is overcome, the expandable blades are enabled to close and approach to the fixed blades, the wind area is reduced, the resistance applied to the variable impeller assembly in a high-speed rotating state is reduced, the utilization rate of wind energy is improved, and the output power and the power generation efficiency of the wind driven generator are increased; the impeller structure form that the overall structure is simple, the resistance type that is complicated relatively combines with the lift type has the easy-to-wear spare few, beneficial effect such as maintenance cost low.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A vertical axis wind turbine impeller easy to start and high in wind energy utilization rate is characterized in that: the variable impeller components are respectively arranged at equal intervals along the circumferential direction of the impeller framework, and can drive the impeller framework to rotate when being acted by airflow;
the variable impeller assembly comprises fixed blades, expandable blades, a connecting shaft, a limiting device and a plurality of reset elastic pieces, wherein the side ends of the expandable blades are movably connected with the fixed blades through the connecting shaft, the connecting shaft is sleeved with the plurality of reset elastic pieces, one ends of the reset elastic pieces are connected with the fixed blades, the other ends of the reset elastic pieces are connected with the expandable blades, and the expandable blades are abutted against the limiting device under the elastic force action of the reset elastic pieces to realize limiting and fixing;
a first included angle is formed between a path formed by the center of the impeller framework through the middle point of the connecting shaft and the radial axis of the fixed blade, the angle of the first included angle is 65-85 degrees, when the variable impeller assembly is not under the action of airflow and is in a static state, a second included angle is formed between the fixed blade and the openable blade under the elastic action of the reset elastic piece, the angle of the second included angle is 45-65 degrees, when the variable impeller assembly is under the action of airflow and rotates, the centrifugal force applied to the openable blade can overcome the elastic force of the reset elastic piece, and the openable blade is enabled to be closed and close to the fixed blade.
2. The vertical axis wind turbine impeller of claim 1 that is easy to start and highly wind-powered, wherein: the impeller framework is of a circular structure, a center rotating shaft is vertically arranged at the center of the impeller framework, and the radius of the impeller framework is the path formed by the center of the impeller framework passing through the middle point of the connecting shaft.
3. The vertical axis wind turbine impeller easy to start and high in wind energy utilization according to claim 1, wherein: the number of the variable impeller assemblies is three, and the included angles between two adjacent variable impeller assemblies are 120 degrees.
4. The vertical axis wind turbine impeller easy to start and high in wind energy utilization according to claim 1, wherein: the angle of the first included angle is 70-80 degrees.
5. The vertical axis wind turbine impeller easy to start and high in wind energy utilization according to claim 1, wherein: and a third included angle is formed between a path formed by the center of the impeller framework passing through the middle point of the connecting shaft and the radial axis of the openable blade, and the angle of the third included angle is 10-30 degrees.
6. The vertical axis wind turbine impeller easy to start and high in wind energy utilization according to claim 1, wherein: the impeller framework comprises a base and a top cover located above the base, and the base is connected with the top cover through fixed blades.
7. The vertical axis wind turbine impeller with easy start-up and high wind energy utilization according to claim 6, wherein: the ratio of the length of the radial axis of the fixed blade to the diameter of the base is 1: 3.
8. The vertical axis wind turbine impeller easy to start and high in wind energy utilization according to claim 1, wherein: the height of the fixed blades is greater than that of the expandable blades.
9. The vertical axis wind turbine impeller easy to start and high in wind energy utilization according to claim 1, wherein: the fixed blades and the expandable blades are respectively provided with a plurality of reinforcing ribs arranged at intervals, and when the expandable blades are closed and close to the fixed blades, the reinforcing ribs on the fixed blades and the expandable blades are arranged in a staggered mode.
10. The vertical axis wind turbine impeller easy to start and high in wind energy utilization rate according to any one of claims 1 to 9, wherein: the impeller framework can be connected with a rotor of an external generator set, so that the wind driven generator is formed.
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| CN202220755281.1U CN217421414U (en) | 2022-04-02 | 2022-04-02 | Vertical axis wind turbine impeller easy to start and high in wind energy utilization rate |
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| CN202220755281.1U CN217421414U (en) | 2022-04-02 | 2022-04-02 | Vertical axis wind turbine impeller easy to start and high in wind energy utilization rate |
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