CN-122014497-A - Bimodal wind driven generator

CN122014497ACN 122014497 ACN122014497 ACN 122014497ACN-122014497-A

Abstract

The application discloses a bimodal wind driven generator, which is characterized in that a blade mounting frame is sleeved on a vertical main shaft, the top ends and the bottom ends of a plurality of bimodal blade structures included in a bimodal blade system are connected to the blade mounting frame through ratchet pawl locking structures, the plurality of bimodal blade structures are uniformly arranged around the blade mounting frame, each bimodal blade structure comprises an inner blade and an outer blade, and the opening angle between the inner blade and the outer blade is adjusted according to the current wind speed through the ratchet pawl locking structures and a gravity resetting structure of the inner blade. According to the embodiment of the application, the bimodal wind power generator can realize automatic mode switching by adjusting the opening angle between the inner side blade and the outer side blade only by depending on wind speed change without a sensor or an external driving source under different wind speeds, so that the bimodal blade system can realize continuous and stable power generation in a sinusoidal wind field and the power generation efficiency is improved.

Inventors

HUANG XIAOKANG
ZHU WEI
SHEN HONGYU
SHANG PENGFEI
WANG RUI
NIU XIAOYAN
LU XUELONG
ZHANG YING
YAN SHENGEN

Assignees

中建科工集团有限公司
中建科工集团(天津)有限公司
太原理工大学

Dates

Publication Date: 20260512
Application Date: 20260415

Claims (20)

1. The bimodal wind driven generator is characterized by comprising a vertical main shaft, a blade mounting frame and a bimodal blade system, wherein the blade mounting frame is sleeved on the vertical main shaft, the top ends and the bottom ends of a plurality of bimodal blade structures included in the bimodal blade system are connected to the blade mounting frame through ratchet pawl locking structures, the bimodal blade structures are uniformly arranged around the blade mounting frame, each bimodal blade structure of the bimodal blade structures comprises an inner blade and an outer blade, and an opening angle between the inner blade and the outer blade is adjusted according to the current wind speed through the ratchet pawl locking structures and a gravity resetting structure of the inner blade, so that the bimodal blade structure is switched in a resistance type fan state or a lift type fan state.
2. The bimodal wind power generator as claimed in claim 1, wherein the angle of opening between the inner and outer blades is greater than 0 ° under the action of the gravity return structure when the current wind speed is less than or equal to a first preset wind speed, and the bimodal blade structure is in a drag-type fan state.
3. The bimodal wind power generator as claimed in claim 2, wherein the angle of opening between the inner and outer blades is such that the inner blade is equal to 0 ° under the action of the gravity return structure when the current wind speed is greater than or equal to a second preset wind speed, and such that the bimodal blade structure assumes a lift fan condition.
4. The bi-modal wind generator of claim 2, wherein the gravity return structure of the inboard blade is offset to a blade centroid such that the inboard blade is driven by a gravitational torque and satisfies the flare angle being greater than 0 ° when the current wind speed is less than or equal to the first preset wind speed.
5. The bi-modal wind generator of claim 4, wherein the inner blade has a gravitational moment greater than a centrifugal moment when the current wind speed is less than or equal to the first preset wind speed such that the splay angle is greater than 0 °.
6. A bimodal wind power generator according to claim 3 wherein the gravitational moment is less than or equal to the centrifugal moment when the current wind speed is greater than or equal to the second preset wind speed, such that the splay angle is equal to 0 °.
7. A bimodal wind power generator as claimed in claim 3, wherein the mounting angle of the outer blades relative to the vertical main shaft is less than 5 °.
8. The bimodal wind driven generator as defined in any one of claims 1-7, wherein the ratchet pawl locking structure comprises an inner wheel, a movable pawl assembly and a ratchet wheel, wherein the ratchet wheel is coaxially arranged with the inner wheel and is positioned in an inner ring area of the ratchet wheel, the inner wheel is fixedly connected with one end of the outer side blade through a connecting shaft, the ratchet wheel is connected with a first end of the inner side blade through a pivot, a plurality of ratchet tooth grooves are circumferentially arranged on the inner ring of the ratchet wheel, the first end of the movable pawl assembly is fixedly connected with the first end face of the inner wheel, and the second end of the movable pawl assembly can be used for being clamped with or separated from the ratchet tooth grooves on the inner ring of the ratchet wheel, one end of the outer side blade is the top end or the bottom end of the outer side blade, and one end of the inner side blade is the top end or the bottom end of the inner side blade and is the same as one end of the outer side blade.
9. The bimodal wind driven generator as defined in claim 8, wherein the movable pawl assembly comprises an elastic member and a pawl, wherein a first end of the elastic member is fixedly connected to a first position on a first end surface of the inner wheel, a second end of the pawl is fixedly connected to a second position on the first end surface of the inner wheel, a spacing distance exists between the second position and the first position, the second end of the pawl is connected with the second end of the elastic member, and the second end of the pawl can be used for being clamped with a ratchet tooth groove on an inner ring of the ratchet or separated from the ratchet tooth groove on the inner ring of the ratchet under the action of the elastic member.
10. The dual-mode wind generator of claim 9, wherein the second end of the pawl is separated from the ratchet tooth slot on the inner ring of the ratchet by the elastic member when the dual-mode blade structure is in the resistive blower state.
11. The dual-mode wind generator of claim 10, wherein the pawl is engaged with a ratchet tooth slot on the inner ring of the ratchet wheel when the dual-mode blade structure is in a lift fan state, so that the ratchet wheel rotates in a first preset rotation direction.
12. The dual-mode wind power generator as claimed in claim 8, wherein the blade mounting frame comprises a first Y-shaped frame and a second Y-shaped frame, the second Y-shaped frame and the first Y-shaped frame are both sleeved on the vertical main shaft and are arranged in parallel with each other, and the first Y-shaped frame is located above the second Y-shaped frame.
13. The bimodal wind driven generator according to claim 12, wherein an included angle between each pair of a first frame bar, a second frame bar and a third frame bar included in the first Y-shaped frame is 120 degrees, an included angle between each pair of a fourth frame bar, a fifth frame bar and a sixth frame bar included in the second Y-shaped frame is 120 degrees, the fourth frame bar is aligned with the first frame bar, the fifth frame bar is aligned with the second frame bar, and the sixth frame bar is aligned with the third frame bar.
14. The bimodal wind generator of claim 13 wherein the plurality of bimodal blade structures in the bimodal blade system comprises a first bimodal blade structure, a second bimodal blade structure and a third bimodal blade structure, wherein a top end of the first bimodal blade structure is connected to a bottom end surface of the first frame bar through a first ratchet pawl locking structure, a bottom end of the first bimodal blade structure is connected to a top end surface of the fourth frame bar through a second ratchet pawl locking structure, a top end of the second bimodal blade structure is connected to a bottom end surface of the second frame bar through a third ratchet pawl locking structure, a bottom end of the second bimodal blade structure is connected to a top end surface of the fifth frame bar through a fourth ratchet pawl locking structure, a top end of the third bimodal blade structure is connected to a bottom end surface of the third frame bar through a fifth ratchet pawl locking structure, and a bottom end of the third bimodal blade structure is connected to a top end surface of the fifth frame bar through a sixth ratchet pawl locking structure.
15. The bimodal wind generator of claim 14 wherein an angle of an outer blade in the first bimodal blade structure with respect to a radial cross section of the first frame bar is a first mounting angle and less than 5 °, an angle of an outer blade in the second bimodal blade structure with respect to a radial cross section of the second frame bar is a second mounting angle and less than 5 °, and an angle of an outer blade in the third bimodal blade structure with respect to a radial cross section of the third frame bar is a third mounting angle and less than 5 °.
16. The bimodal wind power generator as in claim 8, wherein the blade mounting frame comprises a first cross frame and a second cross frame, wherein the second cross frame and the first cross frame are both sleeved on the vertical main shaft and are arranged in parallel with each other, and the first cross frame is located above the second cross frame.
17. The bimodal wind turbine of claim 16 wherein the first cross frame comprises a first frame beam, a second frame beam, a third frame beam, and a fourth frame beam each having an included angle of 90 degrees between two adjacent frame beams, wherein the fifth frame beam, the sixth frame beam, the seventh frame beam, and the eighth frame beam each having an included angle of 90 degrees between two adjacent frame beams, wherein the fifth frame beam is aligned with the first frame beam, the sixth frame beam is aligned with the second frame beam, the seventh frame beam is aligned with the third frame beam, and wherein the eighth frame beam is aligned with the fourth frame beam.
18. The bimodal wind generator of claim 17 wherein the plurality of bimodal blade structures in the bimodal blade system comprises a first bimodal blade structure, a second bimodal blade structure, a third bimodal blade structure and a fourth bimodal blade structure, wherein a top end of the first bimodal blade structure is connected to a bottom end surface of the first frame beam by a first ratchet pawl lockout structure, a bottom end of the first bimodal blade structure is connected to a top end surface of the fifth frame beam by a second ratchet pawl lockout structure, a top end of the second bimodal blade structure is connected to a bottom end surface of the second frame beam by a third ratchet pawl lockout structure, a bottom end of the second bimodal blade structure is connected to a top end surface of the sixth frame beam by a fourth ratchet pawl lockout structure, a top end of the third bimodal blade structure is connected to a bottom end surface of the third frame beam by a fifth ratchet pawl lockout structure, a bottom end of the third bimodal blade structure is connected to a top end surface of the seventh frame beam by a sixth ratchet pawl lockout structure, and a top end of the fourth bimodal blade structure is connected to a top end surface of the eighth frame beam by a fourth ratchet pawl lockout structure.
19. The bimodal wind generator of claim 18 wherein an angle of an outer blade in the first bimodal blade structure with respect to a radial cross section of the first frame beam is a first mounting angle and less than 5 °, an angle of an outer blade in the second bimodal blade structure with respect to a radial cross section of the second frame beam is a second mounting angle and less than 5 °, an angle of an outer blade in the third bimodal blade structure with respect to a radial cross section of the third frame beam is a third mounting angle and less than 5 °, and an angle of an outer blade in the fourth bimodal blade structure with respect to a radial cross section of the fourth frame beam is a third mounting angle and less than 5 °.
20. The dual-mode wind generator of claim 8, further comprising a generator and a tower, wherein the generator is disposed on the tower and wherein the vertical main shaft is coupled to a rotor of the generator.

Description

Bimodal wind driven generator Technical Field The invention relates to the technical field of wind driven generators, in particular to a bimodal wind driven generator. Background Wind energy is a green and renewable energy source, and is widely paid attention to and paid attention to because of abundant resources and mature technology. Traditional horizontal axis wind driven generators have achieved remarkable achievement in design and application, but have certain limitations in many application scenes due to the limitations of sensitivity to wind direction, large occupied area, high noise and the like. In order to avoid the technical defects of the horizontal axis wind driven generator, vertical axis wind driven generators such as lift force type, resistance type, lift resistance compound type and other types of vertical axis wind driven generators are used at present, the miniaturization application is mature, and the vertical axis wind driven generator is widely applied to urban buildings, off-grid power supply, communication base stations, street lamps and other scenes. However, the existing vertical axis wind turbine has some technical bottlenecks in terms of power generation efficiency, that is, the blades adopted by the vertical axis wind turbine cannot be flexibly switched, and the resistance type blade structure is generally adopted, so that the power generation efficiency is lower and is often lower than that of the horizontal axis wind turbine, and the large-scale popularization and application of the vertical axis wind turbine are restricted. Disclosure of Invention The embodiment of the application provides a bimodal wind driven generator, which aims to solve the problem that the power generation efficiency is low because blades adopted in the prior art cannot flexibly switch modes. The embodiment of the application provides a bimodal wind driven generator which comprises a vertical main shaft, a blade mounting frame and a bimodal blade system, wherein the blade mounting frame is sleeved on the vertical main shaft, the top ends and the bottom ends of a plurality of bimodal blade structures included in the bimodal blade system are connected to the blade mounting frame through ratchet wheel and pawl locking structures, the plurality of bimodal blade structures are uniformly arranged around the blade mounting frame, each bimodal blade structure in the plurality of bimodal blade structures comprises an inner blade and an outer blade, and the opening angle between the inner blade and the outer blade is adjusted according to the current wind speed through the ratchet wheel and pawl locking structures and a gravity resetting structure of the inner blade, so that the bimodal blade structures are switched in a resistance type fan state or a lift type fan state. In a possible embodiment, when the current wind speed is less than or equal to a first preset wind speed, the opening angle between the inner blade and the outer blade is greater than 0 ° under the action of the gravity resetting structure, and the bimodal blade structure is in a resistance type fan state. In a possible embodiment, when the current wind speed is greater than or equal to a second preset wind speed, the opening angle between the inner blade and the outer blade is equal to 0 ° under the action of the gravity resetting structure, and the bimodal blade structure is in a lift fan state. In a possible embodiment, the gravity return structure of the inner blade is arranged with a blade centroid offset such that the inner blade is driven by a gravitational moment and satisfies the splay angle being greater than 0 ° when the current wind speed is less than or equal to the first preset wind speed. In a possible embodiment, the gravitational moment is greater than the centrifugal moment when the current wind speed is less than or equal to the first preset wind speed, such that the opening angle is greater than 0 °. In a possible embodiment, the gravitational moment is less than or equal to the centrifugal moment when the current wind speed is greater than or equal to the second preset wind speed, such that the opening angle is equal to 0 °. In a possible embodiment, the mounting angle of the outer blade with respect to the vertical main axis is less than 5 °. In one possible embodiment, the ratchet pawl locking structure comprises an inner wheel, a movable pawl assembly and a ratchet wheel, wherein the ratchet wheel is coaxially arranged with the inner wheel and is positioned in the inner ring area of the ratchet wheel, the inner wheel is fixedly connected with one end of the outer side blade through a connecting shaft, the ratchet wheel is connected with the first end of the inner side blade through a pivot, a plurality of ratchet tooth grooves are formed on the inner ring of the ratchet wheel in a surrounding mode, the first end of the movable pawl assembly is fixedly connected to the first end face of the inner wheel, the second end of t