CN209838592U - Sail wing type vertical axis wind turbine with permanent magnet limiting function - Google Patents
Sail wing type vertical axis wind turbine with permanent magnet limiting function Download PDFInfo
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- CN209838592U CN209838592U CN201920595134.0U CN201920595134U CN209838592U CN 209838592 U CN209838592 U CN 209838592U CN 201920595134 U CN201920595134 U CN 201920595134U CN 209838592 U CN209838592 U CN 209838592U
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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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Abstract
A sail wing type vertical axis wind turbine with a permanent magnet limiting function is characterized in that an upper bracket and a lower bracket are fixedly arranged on a central rotating shaft of the wind turbine, a plurality of blade fixing frames are uniformly distributed among the brackets, the blade fixing frames are hinged with the brackets and can rotate around a hinge point, and a reset spring is arranged in the hinge point; permanent magnets are respectively arranged on the blade fixing frame and the upper bracket, the two permanent magnets are arranged oppositely and in opposite attraction states, and the blade fixing frame is limited and fixed with the upper bracket through the magnetic attraction of the permanent magnets and the spring force of a return spring; each blade fixing frame is provided with a flexible blade, the flexible blade is in an isosceles trapezoid shape after being unfolded into a plane, four angular points of the flexible blade are positioned in the same vertical plane, the long bottom edge of the blade is a free end, and the short bottom edge of the blade is a fixed end; when the blade fixing frame and the upper bracket are in a limiting and fixing state, the installation angle range of a vertical plane where four angular points of the flexible blade are located is +/-30 degrees; the short bottom edge, the long bottom edge and the long and short bottom edge of the flexible blade have the height of a common perpendicular line of 1, (1.01-1.1) and (0.2-0.45).
Description
Technical Field
The utility model belongs to the technical field of wind power generation, especially, relate to a sail wing formula vertical axis wind turbine with permanent magnetism limit function.
Background
Wind energy, which is a clean energy source, accounts for a larger proportion of the traditional energy sources, and a vertical axis wind turbine is a wind power generation device with a wider application range.
At present, the traditional vertical axis wind turbine is mainly applied to small off-grid power supply facilities, and the traditional vertical axis wind turbine generally has the defect of low wind energy utilization rate.
Furthermore, the conventional vertical axis wind turbine has certain limitation in overspeed control, and unlike the pitch or attack angle variation mode of a large horizontal axis wind turbine, the vertical axis wind turbine is almost limited to a mechanical braking mode, and the mechanical braking mode cannot reduce the stress of strong wind on the wind turbine.
SUMMERY OF THE UTILITY MODEL
The problem to prior art exists, the utility model provides a sail wing formula vertical axis wind turbine with permanent magnetism limit function can effectively improve wind energy utilization and rate, can make whole blades and wind direction keep parallel under the high wind to release most wind energy, guarantee the safety of vertical axis wind turbine under the high wind.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a sail wing type vertical axis wind turbine with a permanent magnet limiting function comprises an upper support, a lower support, flexible blades, a blade fixing frame, a central rotating shaft, a first permanent magnet and a second permanent magnet; the upper bracket is horizontally and fixedly arranged at the top end of the central rotating shaft, and the lower bracket is horizontally and fixedly arranged at the lower end of the central rotating shaft; the blade fixing frame is vertically arranged between the upper support and the lower support, the top end of the blade fixing frame is hinged with the upper support, the bottom end of the blade fixing frame is hinged with the lower support, the blade fixing frame can rotate around the hinge joint, and a reset spring is arranged in the hinged point of the blade fixing frame; the flexible blades are arranged on the blade fixing frame, the number of the flexible blades is a plurality, and the flexible blades are uniformly distributed in the circumferential direction; the flexible blade is in an isosceles trapezoid shape after being unfolded into a plane, when the flexible blade is installed on the blade fixing frame, four angular points of the isosceles trapezoid flexible blade are located in the same vertical plane, the long bottom edge of the isosceles trapezoid flexible blade is a free end, and the free end is located on the circumferential side; the short bottom edge of the isosceles trapezoid flexible blade is a fixed end, and the fixed end is positioned on the circle center side; the first permanent magnet is fixedly arranged on the blade fixing frame, the second permanent magnet is fixedly arranged on the upper bracket, the first permanent magnet and the second permanent magnet are arranged oppositely, and the first permanent magnet and the second permanent magnet are in opposite attraction states; the blade fixing frame is limited and fixed with the upper bracket through the magnetic attraction of the permanent magnet and the spring force of the return spring.
The number of the flexible blades is 4-16.
When the blade fixing frame and the upper bracket are in a limiting and fixing state, the installation angle range of the vertical plane where the four angular points of the isosceles trapezoid flexible blade are located is +/-30 degrees.
The isosceles trapezoid flexible blade has the following proportional relations of the height of the common perpendicular lines on the short bottom side, the long bottom side and the long and short bottom sides: the short bottom edge is the long bottom edge, and the height of the common perpendicular line of the long bottom edge and the short bottom edge is 1, (1.01-1.1) and (0.2-0.45).
The utility model has the advantages that:
the utility model discloses a sail wing formula vertical axis wind turbine with permanent magnetism limit function can effectively improve wind energy utilization and rate, can make whole blades and wind direction keep parallel under the strong wind to release most wind energy, guarantee the safety of vertical axis wind turbine under the strong wind.
Drawings
Fig. 1 is a schematic structural diagram of a sail type vertical axis wind turbine (at safe wind speed) with permanent magnet position limiting function according to the present invention;
fig. 2 is a diagram of the working state of the sail-wing type vertical axis wind turbine with permanent magnet position limiting function when the safe wind speed is exceeded;
in the figure, 1-upper support, 2-lower support, 3-flexible blade, 4-blade fixing frame, 5-central rotating shaft, 6-first permanent magnet and 7-second permanent magnet.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a sail-wing type vertical axis wind turbine with a permanent magnet limit function comprises an upper bracket 1, a lower bracket 2, a flexible blade 3, a blade fixing frame 4, a central rotating shaft 5, a first permanent magnet 6 and a second permanent magnet 7; the upper bracket 1 is horizontally and fixedly arranged at the top end of the central rotating shaft 5, and the lower bracket 2 is horizontally and fixedly arranged at the lower end of the central rotating shaft 5; the blade fixing frame 4 is vertically arranged between the upper support 1 and the lower support 2, the top end of the blade fixing frame 4 is hinged with the upper support 1, the bottom end of the blade fixing frame 4 is hinged with the lower support 2, the blade fixing frame 4 can rotate around the hinge joint, and a reset spring is arranged in the hinged point of the blade fixing frame 4; the flexible blades 3 are arranged on the blade fixing frame 4, the number of the flexible blades 3 is a plurality, and the flexible blades 3 are uniformly distributed in the circumferential direction; the flexible blade 3 is in an isosceles trapezoid shape after being unfolded into a plane, when the flexible blade 3 is installed on the blade fixing frame 4, four angular points of the isosceles trapezoid flexible blade 3 are located in the same vertical plane, the long bottom side of the isosceles trapezoid flexible blade 3 is a free end, and the free end is located on the circumferential side; the short bottom edge of the isosceles trapezoid-shaped flexible blade 3 is a fixed end, and the fixed end is positioned on the circle center side; the first permanent magnet 6 is fixedly arranged on the blade fixing frame 4, the second permanent magnet 7 is fixedly arranged on the upper bracket 1, the first permanent magnet 6 is opposite to the second permanent magnet 7, and the first permanent magnet 6 and the second permanent magnet 7 are in opposite attraction states; the blade fixing frame 4 is limited and fixed with the upper bracket 1 through the magnetic attraction of the permanent magnet and the spring force of the return spring.
The number of the flexible blades 3 is 9.
When the blade fixing frame 4 and the upper bracket 1 are in a limiting and fixing state, the installation angle of the vertical plane where the four corner points of the isosceles trapezoid-shaped flexible blade 3 are located is 0 degree.
The isosceles trapezoid flexible blade 3 has the proportional relation of the height of the common perpendicular lines of the short bottom edge, the long bottom edge and the long and short bottom edges: the height of the common perpendicular line of the short bottom edge and the long bottom edge is 1:1.05: 0.25.
When having adopted the utility model discloses a behind the sail wing formula vertical axis wind turbine, under safe wind speed, wind is used in the wind turbine, can make the free end of the flexible blade 3 of windward side swing to centre of a circle side to increased the windward area of blade, and made the blade produce bigger forward moment of torsion, improved the ability that the blade done positive work, and then improved wind energy utilization.
When the wind speed exceeds the safe wind speed, the impact force applied to the blade by the strong wind acting on the blade exceeds the resultant force of magnetic attraction and spring force, at the moment, the first permanent magnet 6 and the second permanent magnet 7 are separated from the limit position, the flexible blade 3 rotates along with the blade fixing frame 4 under the action of the wind force until the vertical plane where the flexible blade 3 is located is parallel to the wind direction (as shown in figure 2), at the moment, the wind energy applied to the flexible blade 3 is greatly reduced, and the wind turbine stops rotating, so that the purpose of protecting the safety of the wind turbine is achieved.
When the safe wind speed that the wind speed descends, under the spring force effect of reset spring, blade mount 4 can be pulled back the normal position, and the magnetic attraction of first permanent magnet 6 and second permanent magnet 7 output plays effect again this moment, and blade mount 4 is fixed once more, and the wind turbine resumes the rotation under safe wind speed again.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A sail wing type vertical axis wind turbine with a permanent magnet limiting function is characterized in that: the device comprises an upper bracket, a lower bracket, a flexible blade, a blade fixing frame, a central rotating shaft, a first permanent magnet and a second permanent magnet; the upper bracket is horizontally and fixedly arranged at the top end of the central rotating shaft, and the lower bracket is horizontally and fixedly arranged at the lower end of the central rotating shaft; the blade fixing frame is vertically arranged between the upper support and the lower support, the top end of the blade fixing frame is hinged with the upper support, the bottom end of the blade fixing frame is hinged with the lower support, the blade fixing frame can rotate around the hinge joint, and a reset spring is arranged in the hinged point of the blade fixing frame; the flexible blades are arranged on the blade fixing frame, the number of the flexible blades is a plurality, and the flexible blades are uniformly distributed in the circumferential direction; the flexible blade is in an isosceles trapezoid shape after being unfolded into a plane, when the flexible blade is installed on the blade fixing frame, four angular points of the isosceles trapezoid flexible blade are located in the same vertical plane, the long bottom edge of the isosceles trapezoid flexible blade is a free end, and the free end is located on the circumferential side; the short bottom edge of the isosceles trapezoid flexible blade is a fixed end, and the fixed end is positioned on the circle center side; the first permanent magnet is fixedly arranged on the blade fixing frame, the second permanent magnet is fixedly arranged on the upper bracket, the first permanent magnet and the second permanent magnet are arranged oppositely, and the first permanent magnet and the second permanent magnet are in opposite attraction states; the blade fixing frame is limited and fixed with the upper bracket through the magnetic attraction of the permanent magnet and the spring force of the return spring.
2. The sailwing vertical axis wind turbine with permanent magnet position limiting function of claim 1, wherein: the number of the flexible blades is 4-16.
3. The sailwing vertical axis wind turbine with permanent magnet position limiting function of claim 1, wherein: when the blade fixing frame and the upper bracket are in a limiting and fixing state, the installation angle range of the vertical plane where the four angular points of the isosceles trapezoid flexible blade are located is +/-30 degrees.
4. The sailwing vertical axis wind turbine with permanent magnet position limiting function of claim 1, wherein: the isosceles trapezoid flexible blade has the following proportional relations of the height of the common perpendicular lines on the short bottom side, the long bottom side and the long and short bottom sides: the short bottom edge is the long bottom edge, and the height of the common perpendicular line of the long bottom edge and the short bottom edge is 1, (1.01-1.1) and (0.2-0.45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920595134.0U CN209838592U (en) | 2019-04-26 | 2019-04-26 | Sail wing type vertical axis wind turbine with permanent magnet limiting function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920595134.0U CN209838592U (en) | 2019-04-26 | 2019-04-26 | Sail wing type vertical axis wind turbine with permanent magnet limiting function |
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| CN209838592U true CN209838592U (en) | 2019-12-24 |
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| CN201920595134.0U Active CN209838592U (en) | 2019-04-26 | 2019-04-26 | Sail wing type vertical axis wind turbine with permanent magnet limiting function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931215A (en) * | 2019-04-26 | 2019-06-25 | 东北大学 | A kind of sail cloth formula vertical-axis wind turbine with permanent magnetism limit function |
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2019
- 2019-04-26 CN CN201920595134.0U patent/CN209838592U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931215A (en) * | 2019-04-26 | 2019-06-25 | 东北大学 | A kind of sail cloth formula vertical-axis wind turbine with permanent magnetism limit function |
| CN109931215B (en) * | 2019-04-26 | 2023-11-28 | 东北大学 | Sailwing type vertical axis wind turbine with permanent magnet limiting function |
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