CN213655036U - Lift-drag integrated blade - Google Patents
Lift-drag integrated blade Download PDFInfo
- Publication number
- CN213655036U CN213655036U CN202022119309.6U CN202022119309U CN213655036U CN 213655036 U CN213655036 U CN 213655036U CN 202022119309 U CN202022119309 U CN 202022119309U CN 213655036 U CN213655036 U CN 213655036U
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- blade
- lift
- wind
- type
- blades
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- 239000002023 wood Substances 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Wind Motors (AREA)
Abstract
The utility model discloses a lift-drag integrated blade, which comprises a lift force type blade, wherein lift force type small blades are removed from the lift force type blade in a material reducing processing mode, the position of the lift type blade where the lift type small blade is removed forms a blade wind resistance cavity, the utility model is suitable for a small wind turbine, wood is selected as the blade material, and through the mode of material reduction processing, namely, the lift-like small blades in the lift-type blades are removed to process the blades so as to ensure the strength of the blades and ensure the normal use of the blades under severe working conditions, in the traditional lift type blade, a smaller similar lift type small blade is removed to form a blade wind resistance cavity, reach with this the utility model discloses a blade can have better aerodynamic performance and higher wind energy utilization ratio's purpose, and when wind energy conversion system started, the blade hinders the wind cavity part and provides the starting torque for wind energy conversion system.
Description
Technical Field
The utility model belongs to the technical field of wind power generation, concretely relates to lift and hinder integral type blade.
Background
Wind power generation is to convert kinetic energy of wind into electric energy, wind energy is a clean and pollution-free renewable energy source and is utilized by people for a long time, mainly water pumping, surface grinding and the like are realized through windmills, people are interested in how to utilize wind to generate electricity, the wind power generation is very environment-friendly, and the wind energy is huge, so that the wind power generation is increasingly valued by countries in the world.
The prior art has the following problems: the self-starting performance of the traditional vertical axis lift type wind turbine is poor, the wind energy utilization rate of the resistance type wind turbine is low, and the reasons are as follows: the maximum wind energy utilization rate of the lift type blade is 0.593, the maximum wind energy utilization rate of the resistance type blade is 0.16, so that the difference between the resistance type blade and the lift type blade is large in the aspect of the wind energy utilization rate, the torque provided by the lift type blade is small although the lift force is large, the self-starting performance is poor, and most wind turbines combining the lift type blade and the resistance type blade are used in the market at present, but the obvious defect still exists.
SUMMERY OF THE UTILITY MODEL
To solve the problems set forth in the background art described above. The utility model provides a rise and hinder integral type blade, it is poor to solve vertical axis lift type wind energy conversion system self-starting performance, problem that vertical axis resistance type wind energy conversion system wind energy utilization is low.
In order to achieve the above object, the utility model provides a following technical scheme: a lift-drag integrated blade comprises a lift type blade, wherein a lift type small blade is removed from the lift type blade, a blade wind-drag cavity is formed at the position, where the lift type small blade is removed, of the lift type blade, the appearance structure of the lift type small blade is consistent with that of the lift type blade, and the chord length of the lift type small blade is twice of the opening length of the blade wind-drag cavity.
Preferably, the blade wind resistance cavity provides resistance for the lift type blade to do work.
Preferably, when the wind turbine is started, the blade wind resistance cavity provides starting torque for the wind turbine, and when the rotating speed of the wind turbine is gradually increased, the shape of most of the lifting force type blades retained by the blades ensures that the wind turbine can do work better.
Preferably, the lifting type blade is made of wood as a blade material.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model is suitable for a small wind turbine, selects wood as the blade material, and through the mode of material reduction processing, namely, removes a similar lift force type small blade in the lift force type blade to process the blade, thereby ensuring the blade strength, and ensuring the normal use of the blade under the severer working condition, in the traditional lift force type blade, removes a smaller similar lift force type small blade, and forms a blade wind resistance cavity for the blade, thereby achieving the purpose that the blade of the utility model has better aerodynamic performance and higher wind energy utilization rate, because the utility model keeps the appearance of most lift force type blades, can provide lift force acting, and utilizes the blade wind resistance cavity to provide resistance acting for the blade, so the utility model has the characteristics of lift force and resistance acting simultaneously, the lift force and resistance acting simultaneously can enable the utility model to have higher wind energy utilization rate, when the wind turbine is started, the blade hinders wind cavity part and provides start-up moment for the wind energy conversion system, when the wind wheel rotational speed crescent, the better acting of wind energy conversion system can be guaranteed to the appearance of most lift type blade that the blade kept, both can guarantee like this to leave sufficient income wind gap for the blade hinders the wind cavity, also can keep the wing-shaped appearance of lift in the at utmost, from the startability relatively poor for traditional vertical axis lift type wind energy conversion system, resistance type wind energy conversion system wind energy utilization ratio is lower, under the same wing-shaped condition the utility model discloses the wind energy utilization ratio that rises and hinders integral type wind energy conversion system blade will be higher than resistance type wind energy conversion system, from the startability better.
Drawings
Fig. 1 is a perspective view of the present invention;
fig. 2 is a perspective view of another perspective of the present invention;
FIG. 3 is a top view of the lift blade of the present invention;
in the figure: 1. a lift-type blade; 2. lift-like vanelets; 3. and the blade wind resistance cavity.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides the following technical solutions: a lift-drag integrated blade comprises a lift type blade 1, wherein a lift type small blade 2 is removed from the lift type blade 1, a blade drag cavity 3 is formed at the position, where the lift type small blade 2 is removed, of the lift type blade 1, the appearance structure of the lift type small blade 2 is consistent with that of the lift type blade 1, and the chord length of the lift type small blade 2 is twice of the opening length of the blade drag cavity 3.
In the present embodiment, it is preferable that the lift type blade 1 is provided with resistance work through the blade wind-blocking cavity 3.
In this embodiment, preferably, the blade wind-blocking cavity 3 enables the lift-type blade 1 to have better aerodynamic performance and higher wind energy utilization rate when the wind turbine is started, the blade wind-blocking cavity 3 provides a starting torque for the wind turbine, and when the rotation speed of the wind turbine is gradually increased, the shape of most of the lift-type blades 1 retained by the blades ensures that the wind turbine performs better work.
In this embodiment, the lift-type blade 1 is preferably made of wood.
The utility model discloses a theory of operation and use flow: the lift type blade 1, the similar lift type small blade 2 and the blade wind-resisting cavity 3 are in specific shapes and structures as shown in figures 1-3, the utility model is suitable for a small wind turbine, wood is selected as the blade material, the similar lift type small blade 2 is removed from the lift type blade 1 to process the blade in a material reducing processing mode, so as to ensure the strength of the blade and ensure the normal use of the blade under the severe working condition, in the traditional lift type blade 1, a smaller similar lift type small blade 2 is removed to form the blade wind-resisting cavity 3, the chord length of the similar lift type small blade 2 is c, the opening length d of the blade wind-resisting cavity 3 is half of c, thus not only enough wind inlets can be ensured to be reserved for the wind-resisting cavity, but also the shape of the lift wing can be reserved to the maximum degree, thereby achieving the purposes of better aerodynamic performance and higher wind energy utilization rate of the blade of the utility model, because the utility model keeps the appearance of most lift type blades 1, can provide lift work, and provides resistance work for the blades by utilizing the blade wind-resisting cavity 3, so the utility model has the characteristics of lift and resistance work, and the simultaneous action of lift and resistance can ensure the utility model has higher wind energy utilization rate, when the wind turbine is started, the blade wind-resisting cavity 3 provides starting torque for the wind turbine, when the rotating speed of the wind turbine is gradually increased, the appearance of most lift type blades 1 kept by the blades can ensure better work of the wind turbine, thus not only enough air inlets can be kept for the blade wind-resisting cavity 3, but also the appearance of lift wing can be kept to the maximum extent, the self-starting performance of the wind turbine is poorer compared with the traditional vertical axis lift type wind turbine, the wind energy utilization rate of the resistance type wind turbine is lower, under the condition of the same wing shape, the wind energy utilization rate of the lift type wind turbine blades of the lift type wind turbine of the utility model is, the self-starting performance is better.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A lift-drag integrated blade comprises a lift type blade (1), and is characterized in that: the lift-like small blade (2) is removed from the lift-type blade (1), a blade wind-resisting cavity (3) is formed at the position where the lift-like small blade (2) is removed from the lift-type blade (1), the appearance structure of the lift-like small blade (2) is consistent with that of the lift-type blade (1), and the chord length of the lift-like small blade (2) is twice of the opening length of the blade wind-resisting cavity (3).
2. A lift-drag integrated blade according to claim 1, wherein: the lift type blade (1) is provided with resistance to do work through the blade wind resistance cavity (3).
3. A lift-drag integrated blade according to claim 1, wherein: when the wind turbine is started, the blade wind resistance cavity (3) provides starting torque for the wind turbine, and when the rotating speed of the wind wheel is gradually increased, the shape of most of the lifting force type blades (1) reserved by the blades ensures that the wind turbine can do work better.
4. A lift-drag integrated blade according to claim 1, wherein: the lift type blade (1) is made of wood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022119309.6U CN213655036U (en) | 2020-09-24 | 2020-09-24 | Lift-drag integrated blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022119309.6U CN213655036U (en) | 2020-09-24 | 2020-09-24 | Lift-drag integrated blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213655036U true CN213655036U (en) | 2021-07-09 |
Family
ID=76697937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022119309.6U Expired - Fee Related CN213655036U (en) | 2020-09-24 | 2020-09-24 | Lift-drag integrated blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213655036U (en) |
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2020
- 2020-09-24 CN CN202022119309.6U patent/CN213655036U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210709 |
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| CF01 | Termination of patent right due to non-payment of annual fee |