CN117189459A - Double-layer blade propeller wind turbine - Google Patents
Double-layer blade propeller wind turbine Download PDFInfo
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- CN117189459A CN117189459A CN202311388258.9A CN202311388258A CN117189459A CN 117189459 A CN117189459 A CN 117189459A CN 202311388258 A CN202311388258 A CN 202311388258A CN 117189459 A CN117189459 A CN 117189459A
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- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The application relates to a double-layer blade propeller wind turbine, which comprises a cabin, wherein a base is fixedly arranged at the bottom of the cabin, a generator is fixedly arranged in the cabin, a second gearbox is fixedly arranged in the cabin, a first gearbox is fixedly arranged in the cabin, a brake is arranged between the first gearbox and the second gearbox, a main shaft is fixedly arranged at the output end of the first gearbox, and a supporting frame is fixedly arranged at the inner bottom wall of the cabin. According to the double-layer blade propeller wind turbine, wind energy utilization efficiency is greatly improved by utilizing the double-layer blade propeller, so that the power generation efficiency of the wind turbine is improved, the wind turbine can operate at a wind speed of 2.5-60 m/s, the annual available working hours of the whole wind turbine is greatly improved, and an important result is that the wind turbine with double-layer blades generates more than 30% of power under the same wind power resource condition compared with the traditional three-blade wind turbine.
Description
Technical Field
The application relates to the technical field of wind turbines, in particular to a double-layer blade propeller wind turbine.
Background
The horizontal axis wind turbine generator is driven by an impeller consisting of three to five blades, each connected to a hub by a large diameter rolling bearing or flange. However, the high-power wind turbine generator is basically driven by a three-blade impeller at present, and the wind energy utilization efficiency is low. The wind turbine generator with the horizontal shaft can be divided into two types, wherein one type is that an impeller rotates to directly drive a main shaft to drive a rotor of a generator to generate electricity; the other is that the impeller rotates to drive a group of gearboxes to increase torque, so that the wind turbine can continuously run in a larger wind speed range.
No matter which horizontal axis wind turbine is capable of achieving rated power operation at low wind speed or continuously operating at high wind speed, the wind turbine is limited by certain working wind speed, and the rated working wind speed of most horizontal axis wind turbines is 13-30 m/s. The wind power generator transmits the generated power to the power grid, it mounts three-phase alternators, and their kinds can be categorized into two types: synchronous and asynchronous generators, in general, in both versions, a step-up gearbox with gearing is mounted between the blade hub and the generator in the wind turbine. The qualitative nature of the generated current and the optimal degree of utilization of the wind energy require that the generator rotor be at a constant rotational speed. If the wind speed is at or above the rated wind speed, the rotor of the generator can easily achieve a constant speed. If the wind speed drops to 10m/s or less, then maintaining the generator speed constant becomes an issue.
Disclosure of Invention
Aiming at the defects of the prior art, the application provides the double-layer blade propeller wind turbine, and the wind energy utilization efficiency is greatly improved by utilizing the double-layer blade propeller, so that the power generation efficiency of the wind turbine is improved.
In order to achieve the above purpose, the present application provides the following technical solutions: the utility model provides a double-deck blade screw wind turbine generator system, includes the cabin, the bottom fixed mounting in cabin has the base, the inside fixed mounting in cabin has the generator, the inside fixed mounting in cabin has the second gearbox, the inside fixed mounting in cabin has first gearbox, be provided with the stopper between first gearbox and the second gearbox, the output fixed mounting of first gearbox has the main shaft, the interior bottom wall fixed mounting in cabin has the support frame, be provided with first blade screw and second blade screw on the main shaft, the right side in cabin rotates and installs the inner axle, the surface cover of inner axle is equipped with the transmission section of thick bamboo, the right-hand member cover of inner axle is equipped with the fixed cap, the surface cover of transmission section of thick bamboo is equipped with the stop collar, the surface fixed mounting in inner axle has first drive gear, the surface fixed mounting of transmission section of thick bamboo has the second drive gear, the surface fixed mounting in the outer surface of main shaft has first drive gear, the right side transmission of cabin installs the pivot, the surface fixed mounting in the pivot has the drive gear, the surface of the right side of inner axle is fixed mounting of sleeve.
Further, a transmission rod is arranged between the second gearbox and the generator in a transmission mode, and the first gearbox and the second gearbox are in transmission connection through a brake.
Further, the main shaft is rotatably arranged at the top of the supporting frame, and the first gearbox is positioned on the right side of the second gearbox.
Further, the inner bottom wall of the engine room is fixedly provided with a support column, and the second gearbox is fixedly arranged at the top of the support column.
Further, the right end of the main shaft penetrates through the nacelle and extends to the right side of the nacelle, and the length of the inner shaft is greater than that of the transmission cylinder.
Further, the first blade propeller is fixedly arranged on the outer surface of the transmission cylinder, and the second blade propeller is fixedly arranged on the outer surface of the inner shaft.
Further, the second transmission gear is positioned on the right side of the first transmission gear, and the limiting sleeve is positioned on the right side of the second transmission gear.
Further, the main shaft is positioned below the inner shaft, and the first driving gear is meshed with the first transmission gear.
Further, the first drive gear intermeshes with the transfer gear, and the brake gear intermeshes with the second transfer gear.
Further, the transmission cylinder is rotatably arranged between the two clamping sleeves, and the limiting sleeve is clamped on the outer surface of the lock sleeve.
Compared with the prior art, the technical scheme of the application has the following beneficial effects:
1. the wind energy utilization efficiency is greatly improved by utilizing the double-layer blade propeller, so that the power generation efficiency of the wind turbine generator is improved.
2. The wind turbine generator can operate at the wind speed of 2.5-60 m/s, so that the annual available working hours of the whole wind turbine generator are greatly improved.
3. Compared with the traditional three-blade wind turbine generator, the double-layer blade wind turbine generator provided by the application generates more than 30% more electricity under the same wind energy condition.
Drawings
FIG. 1 is a schematic diagram of the structure of the present application;
FIG. 2 is a schematic view of the transmission structure of a first vane propeller and a second vane propeller according to the present application;
FIG. 3 is a schematic view of the connection structure of the inner shaft and the transmission cylinder of the present application;
FIG. 4 is a diagram of an ideal fan layout of the present application;
FIG. 5 is a graph of the loss power factor of the present application;
FIG. 6 is a flow chart of the standard wind turbine disk mounting location of the present application.
In the figure: 1. a nacelle; 2. a base; 3. a generator; 4. a second gearbox; 5. a brake; 6. a first gearbox; 7. a main shaft; 8. a support frame; 9. a first vane propeller; 10. a second blade propeller; 11. an inner shaft; 12. a transmission cylinder; 13. a fixing cap; 14. a limit sleeve; 15. a first transmission gear; 16. a second transmission gear; 17. a first drive gear; 18. a rotating shaft; 19. a transmission gear; 20. a brake gear; 22. a cutting sleeve; 23. a lock sleeve.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1
Referring to fig. 1-3, a double-layer blade propeller wind turbine in this embodiment includes a nacelle 1, and is characterized in that: the bottom of the engine room 1 is fixedly provided with the base 2, the inside of the engine room 1 is fixedly provided with the generator 3, the inside of the engine room 1 is fixedly provided with the second gearbox 4, the inside of the engine room 1 is fixedly provided with the first gearbox 6, a brake 5 is arranged between the first gearbox 6 and the second gearbox 4, the output end of the first gearbox 6 is fixedly provided with the main shaft 7, the inner bottom wall of the engine room 1 is fixedly provided with the support frame 8, the main shaft 7 is provided with the first blade propeller 9 and the second blade propeller 10, the right side of the engine room 1 is rotatably provided with the inner shaft 11, the outer surface of the inner shaft 11 is sleeved with the transmission sleeve 12, the right end of the inner shaft 11 is sleeved with the fixing cap 13, the outer surface of the transmission sleeve 12 is sleeved with the limiting sleeve 14, the outer surface of the inner shaft 11 is fixedly provided with the first transmission gear 15, the outer surface of the transmission sleeve 12 is fixedly provided with the second transmission gear 16, the outer surface of the main shaft 7 is fixedly provided with the first driving gear 17, the right side of the engine room 1 is fixedly provided with the rotating shaft 18, the outer surface of the rotating shaft 18 is fixedly provided with the transmission gear 19, the outer surface of the rotating shaft 18 is fixedly provided with the transmission sleeve 12, the outer surface of the rotating shaft 11 is fixedly provided with the brake gear 20, the outer surfaces of the transmission sleeve 12 is fixedly provided with the outer surfaces of the transmission sleeve 12 are fixedly provided with the outer surfaces of the transmission sleeve 12, and the outer surfaces of the right and the outer sleeve 12 is fixedly provided with the outer sleeve 23.
In the embodiment, the first gearbox 4 and the generator 3 are in braking connection through a transmission rod, the first gearbox 6 and the second gearbox 4 are in transmission connection through a brake, the main shaft 7 is supported by the support frame 8, and the second gearbox 6 is installed in the cabin 1 through a support column.
In the present embodiment, the right end of the main shaft 7 passes through the nacelle 1 and extends to the outside of the nacelle 1, the size of the transmission cylinder 12 is smaller than that of the inner shaft 11, and the transmission cylinder 12 is clamped between two clamping sleeves 22.
In the present embodiment, the first drive gear 17 intermeshes with the first transfer gear 15, the first drive gear 17 intermeshes with the transfer gear 19, and the brake gear 20 intermeshes with the second transfer gear 16.
In this embodiment, the first blade propeller 9 and the second blade propeller 10 are identical in size and shape, wherein the outer layer is 3 or 4 blades, the inner layer is 4 or 5 blades, the first blade propeller 9 and the second blade propeller 10 are tightly mounted in parallel, and the first gearbox 6 and the second gearbox 4 are arranged in the nacelle 1 to increase and decrease the torque to the generator rotor at different wind speeds.
By adopting the technical scheme, after wind power acts on the double-layer blades, the first blade propeller 9 and the second blade propeller 10 rotate to drive the main shaft 7 connected with the first group of gearboxes 6 positioned in the engine room 1, and the kinetic energy of the wind is transmitted to the second group of gearboxes 4 positioned in the engine room 1 through the first group of gearboxes, 6, and the second group of gearboxes, 4 transmit mechanical energy to the main shaft of the rotor of the generator 3.
By adopting the technical scheme, when the wind speed reaches an extreme condition, the brake 5 can forcedly brake the wind turbine generator, and the wind turbine generator is in a stop state at this time, and under different wind directions, the wind turbine generator can automatically change to an optimal wind receiving angle along with the round ball bearings on the base 2. By means of the control system, when the wind speed is small, the two sets of gearboxes increase the torque generated on the double-layer blade propeller to the torque under the rated output condition of the generator of the wind turbine generator; when the wind speed is high, the two sets of gearboxes reduce the torque generated on the double-layer blade propeller to the torque in the rated output state of the generator of the wind turbine, so that the wind turbine can operate at the wind speed of 2.5-60 m/s, the annual available working hours of the whole wind turbine are greatly improved, and the important result is that the wind turbine with the double-layer blades generates more than 30% more power than the traditional wind turbine with three blades under the same wind power resource condition.
In this embodiment, the application contemplates a double-bladed propeller impeller in which the planetary gear acts as a step-up gearbox, mounted in the transmission between the wind turbine impeller and the generator, with a planetary gear assembly of three shafts movable, double-circuit gear mechanisms in one housing, each transmitting motion and torque from one of the impeller rotors, regardless of the motion of the other circuit, and the kinematic circuit of the circuit is a planetary gearbox. A coaxial gear reduction gearbox is arranged between the speed-up gearbox and the generator rotor, and the motion diagram of the coaxial gear reduction gearbox is carried out according to the condition of delta omega 1 = K-delta omega 2, wherein delta omega 1 is the change of the angular speed of an input inner shaft and delta omega 2 is the change of the angular speed of an input outer shaft; k is a constant coefficient, which depends only on the kinematic scheme of the gearbox, ensuring that the output shaft revolution remains at a constant speed as the input shaft revolution varies.
In order to use the energy of the wind to the maximum, the blades of the outer impeller are automatically rotated to the installation angle corresponding to the wind speed at a given time according to the command of the control system. The blades of the inner impeller are rotated to such an installation angle as to keep the rotational speed of the generator constant. The number of revolutions per impeller decreases with decreasing wind speed and increases with increasing wind speed. This algorithm for changing speed is set using a three-shaft gearbox.
Example two
Referring to FIGS. 4-6, wherein 0-flow is input in cross-section, area S 0 The method comprises the steps of carrying out a first treatment on the surface of the 1-wind turbine, area S 1 The method comprises the steps of carrying out a first treatment on the surface of the 2-flow output section; 3-wind turbine conditional access loop; 4-air flow around fan, mass m 2 ，m 1
Turbine disk flow rate mass.
Wherein a-turbine flow velocity vector; b-packet flow velocity vector; c-total velocity vector.
The wind energy utilization coefficient is the ratio of the power Δw lost by the airflow through the disk to the available power W of the airflow as it moves along the channel with the wind turbine. W is arranged on wind wheel S 1 Area and speed ranges are defined:
V 0 :W＝(ρS 1 V 0 3 )/2，
and the proportion of energy converted in the conditional turbine disk,
ΔW/W＝4(V 1 2 V 0 2 -V 1 3 V 0 3 )， (1)
this is the well-known basic theory of wind energy computation, the well-known betz theory formulation.
For practical use, the ratio 1 is best expressed as:
ΔW/W＝4(S 0 2 S 1 2 -S 0 3 S 1 3 )， (2)
when S is 0 /S 1 When=2/3, the maximum value is Δw/W,
(ΔW/W) max ＝0.5926， (3)
consider an air movement section from section "0" to section "1", i.e., a turbine disk. Let us repeat the description path resulting in a coefficient of 0.5926.
Equation of kinetic energy change between the "0" and "1" sections of the channel:
ΔW 1-2 ＝m 1 (V 0 2 –V 1 2 )/2,
wherein m is 1 Is the mass of air per second through the turbine. By simple conversion we have obtained the value of the "lost" energy of the air flow in the channel from section "0" to section "1":
ΔW 1-2 /W＝V 1 /V 0 –V 1 3 /V 0 3 ， (4)
maximum "lost" energy:
(ΔW 1-2 /W) max ＝0.385， (5)
but there are no wind turbines in the "0-1" region. Coefficient relation
DeltaW/W and DeltaW 1-2 /W，V 1 /V 0 ＝S 0 /S 1 ，
As shown in fig. 5:
comparing the proportions of formulas (3) and (4), considering fig. 4 and 5, it can be concluded that the wind turbine is detachable maximum energy: ΔW/W.apprxeq.0.24. Therefore, the betz coefficient is not the energy maximum utilization coefficient. This is only an indicator of the kinetic energy change and hydraulic resistance of an insulated pipe. Due to the suppression of the airflow, about 30% of the wind energy cannot enter the conditionally isolated channel nor be converted into wind turbine operation. A generally idealized image of the energy distribution in a gas stream separated from the ambient mass exchange is shown in fig. 6:
1) 30% of the energy is lost as the airflow flows through the turbine disk;
2) 70% of the energy enters the turbine disc.
In the ideal windmill theory of g.h.sabinin, the influence of the air flow of the outer envelope rotor is partly taken into account. The ideal windmill theory is based on the following points that the vortex ropes are converged from the circle formed by the maximum diameter of the blade along the airflow direction, so that a thin vortex layer is formed. At a speed (V) 0 +V 2 ) And/2, the vortex layer transmits kinetic energy into the air, the air passes through the fan, the pressure difference on the wind wheel disc is increased, and the energy proportion generated by the turbine is increased. The calculated base is ζ=0.687.
In classical ideal windmill theory, a part of the air flow does not pass through the disk, around the disk into the surrounding air, the magnitude of this part of the flow depends on S 1 And S is 0 Area ratio of (c). At S 1 In the region where the active conversion of kinetic energy takes place, a small deflection, not necessarily an envelope flow, is made to travel around the disk, which is formed to allow the flow to pass between the turbine blades or through the central part of the disk, into and through S 1 In the air of the active cross section, thereby increasing the wind energy utilization rate.
In summary, the wind energy utilization efficiency is greatly improved by utilizing the double-layer blade propeller, so that the power generation efficiency of the wind turbine is improved, the wind turbine can operate at the wind speed of 2.5-60 m/s, the annual available working hours of the whole wind turbine are greatly improved, and the double-layer blade wind turbine generates more than 30% more power than the traditional three-blade wind turbine under the same wind energy condition.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. Double-deck blade screw wind turbine generator system, including cabin (1), its characterized in that: the bottom of the engine room (1) is fixedly provided with a base (2), the inside of the engine room (1) is fixedly provided with a generator (3), the inside of the engine room (1) is fixedly provided with a second gearbox (4), the inside of the engine room (1) is fixedly provided with a first gearbox (6), a brake (5) is arranged between the first gearbox (6) and the second gearbox (4), the output end of the first gearbox (6) is fixedly provided with a main shaft (7), the inner bottom wall of the engine room (1) is fixedly provided with a supporting frame (8), the main shaft (7) is provided with a first blade propeller (9) and a second blade propeller (10), the right side of the engine room (1) is rotatably provided with an inner shaft (11), the outer surface of the inner shaft (11) is sleeved with a transmission cylinder (12), the right end of the inner shaft (11) is sleeved with a fixing cap (13), the outer surface of the transmission cylinder (12) is sleeved with a limit sleeve (14), the outer surface of the inner shaft (11) is fixedly provided with a first transmission gear (15), the outer surface of the transmission cylinder (12) is fixedly provided with a main shaft (17), the outer surface of the main shaft (17) is fixedly provided with a driving shaft (17), the outer surface of the rotating shaft (18) is fixedly provided with a transmission gear (19), the outer surface of the rotating shaft (18) is fixedly provided with a brake gear (20), the left side and the right side of the outer surface of the inner shaft (11) are fixedly provided with clamping sleeves (22), and the outer surface of the transmission cylinder (12) is fixedly provided with a lock sleeve (23).
2. The double-layer blade propeller wind turbine according to claim 1, wherein: a transmission rod is arranged between the second gearbox (4) and the generator (3) in a transmission manner, and the first gearbox (6) is in transmission connection with the second gearbox (4) through a brake (5).
3. The double-layer blade propeller wind turbine according to claim 1, wherein: the main shaft (7) is rotatably arranged at the top of the supporting frame (8), and the first gearbox (6) is positioned on the right side of the second gearbox (4).
4. The double-layer blade propeller wind turbine according to claim 1, wherein: the inner bottom wall of the engine room (1) is fixedly provided with a supporting column, and the second gearbox (6) is fixedly arranged at the top of the supporting column.
5. The double-layer blade propeller wind turbine according to claim 1, wherein: the right end of the main shaft (7) penetrates through the engine room (1) and extends to the right side of the engine room (1), and the length of the inner shaft (11) is larger than that of the transmission cylinder (12).
6. The double-layer blade propeller wind turbine according to claim 1, wherein: the first blade propeller (9) is fixedly arranged on the outer surface of the transmission cylinder (12), and the second blade propeller (10) is fixedly arranged on the outer surface of the inner shaft (11).
7. The double-layer blade propeller wind turbine according to claim 1, wherein: the second transmission gear (16) is positioned on the right side of the first transmission gear (15), and the limiting sleeve (14) is positioned on the right side of the second transmission gear (16).
8. The double-layer blade propeller wind turbine according to claim 1, wherein: the main shaft (7) is positioned below the inner shaft (11), and the first driving gear (17) is meshed with the first transmission gear (15).
9. The double-layer blade propeller wind turbine according to claim 1, wherein: the first drive gear (17) meshes with a transmission gear (19), and the brake gear (20) meshes with a second transmission gear (16).
10. The double-layer blade propeller wind turbine according to claim 1, wherein: the transmission barrel (12) is rotatably arranged between the two clamping sleeves (22), and the limiting sleeve (14) is clamped on the outer surface of the lock sleeve (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311388258.9A CN117189459A (en) | 2023-10-25 | 2023-10-25 | Double-layer blade propeller wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311388258.9A CN117189459A (en) | 2023-10-25 | 2023-10-25 | Double-layer blade propeller wind turbine |
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| Publication Number | Publication Date |
|---|---|
| CN117189459A true CN117189459A (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311388258.9A Pending CN117189459A (en) | 2023-10-25 | 2023-10-25 | Double-layer blade propeller wind turbine |
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| Country | Link |
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| CN (1) | CN117189459A (en) |
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2023
- 2023-10-25 CN CN202311388258.9A patent/CN117189459A/en active Pending
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