CN-121993342-A - Mixed vertical axis wind turbine with psittacosis shell bionic structure and method

CN121993342ACN 121993342 ACN121993342 ACN 121993342ACN-121993342-A

Abstract

The invention discloses a hybrid vertical axis wind turbine with a psittacosis shell bionic structure and a method thereof, comprising a central fixed upright post, a first-stage wind wheel, a diversion speed increasing cover, a second-stage wind wheel and a wind shielding wind turbine, wherein the first-stage wind wheel comprises a psittacosis shell bionic blade, the first-stage wind wheel is rotatably arranged at a first height position of the central fixed upright post and is used for receiving and utilizing original wind energy, the diversion speed increasing cover is fixedly arranged on the central fixed upright post and is positioned on the leeward side of the first-stage wind wheel, a speed increasing slit is formed in the top of the diversion speed increasing cover, the second-stage wind wheel comprises a lifting type blade, the second-stage wind wheel is rotatably arranged at a second height position of the central fixed upright post and is positioned in an inner space surrounded by the wind shielding diversion cover, and wake flow generated by the first-stage wind wheel is guided into the diversion speed increasing cover through the speed increasing slit to drive the second-stage wind wheel to rotate. According to the invention, the first-stage bionic wind wheel captures and generates wake flow, and the second-stage independent wind wheel is driven after the speed is increased by the guide cover, so that the problems that the vertical axis wind turbine is difficult to start and the single wind energy utilization rate is low at low wind speed are solved.

Inventors

CAO YANG
ZHU CHENYU
QIAN ZHONG
SONG CHENGUANG
YANG YUAN
CAI TING
ZHU YIXIAN
LI ZHUOYAO
LI ZHONGYU

Assignees

南通大学

Dates

Publication Date: 20260508
Application Date: 20260228

Claims (12)

1. A hybrid vertical axis wind turbine with a psittacosis shell bionic structure is characterized by comprising: a central fixed upright (1); A primary wind wheel (2) comprising at least one psittacosis shell bionic blade (21), the primary wind wheel (2) being rotatably arranged at a first height position of the central fixed upright (1) for receiving and utilizing raw wind energy; The diversion speed increasing cover (3) is fixedly arranged on the central fixed upright post (1) and positioned on the leeward side of the primary wind wheel (2), and a speed increasing slit (31) is formed in the top of the diversion speed increasing cover (3); The secondary wind wheel (4) comprises at least one lifting type blade (41), and the secondary wind wheel (4) is rotatably arranged at a second height position of the central fixed upright post (1) and is positioned in an inner space surrounded by the wind-shielding air guide cover (3); The primary wind wheel (2) and the secondary wind wheel (4) can rotate independently around the central fixed upright post (1), and the tail flow generated by the primary wind wheel (2) is led into the diversion speed increasing cover (3) through the speed increasing slit (31) so as to drive the secondary wind wheel (4) to rotate.
2. The hybrid vertical axis wind turbine with the psittacosis shell bionic structure according to claim 1, wherein the primary wind wheel (2) further comprises an upper blade connecting column (22), and the psittacosis shell bionic blades (21) are connected to the upper blade connecting column (22) in a circumferential array; The secondary wind wheel (4) further comprises a lower blade connecting column (42), and a plurality of lifting blades (41) are connected to the lower blade connecting column (42) in a circumferential array; The upper blade connecting column (22) and the lower blade connecting column (42) are of hollow shaft structures and are rotatably arranged on the central fixing upright column (1) through bearing assemblies respectively.
3. The hybrid vertical axis wind turbine with the psittacosis shell bionic structure according to claim 2, further comprising an upper blade connecting motor (5 a) and a lower blade connecting motor (5 b), wherein the upper blade connecting column (22) is correspondingly connected with the upper blade connecting motor (5 a), and the lower blade connecting column (42) is correspondingly connected with the lower blade connecting motor (5 b).
4. The hybrid vertical axis wind turbine of a psittacosis shell bionic structure according to claim 3, wherein the upper blade connecting motor (5 a) and the lower blade connecting motor (5 b) have the same structure, and respectively comprise: A motor housing (51) rotatably connected to the center fixed column (1) through a motor bearing, and provided with a permanent magnet (52); A coil winding plate (53) fixed on the central fixed upright (1) and provided with a coil winding (54); wherein, the motor housing (51) of the upper blade connecting motor (5 a) is connected with the upper blade connecting column (22), and the motor housing (51) of the lower blade connecting motor (5 b) is connected with the lower blade connecting column (42).
5. The hybrid vertical axis wind turbine of a psittacosis shell bionic structure according to claim 1, wherein the accelerating slit (31) is a slit structure with a cross-sectional area gradually reduced along the airflow direction.
6. The hybrid vertical axis wind turbine with the psittacosis shell bionic structure according to claim 1 or 5, wherein the number of the speed increasing slits (31) is multiple, and the speed increasing slits are uniformly distributed along the top circumference of the diversion speed increasing cover (3).
7. The hybrid vertical axis wind turbine with the psittacosis shell bionic structure according to claim 1, wherein the bottom of the diversion speed increasing cover (3) is open.
8. The hybrid vertical axis wind turbine with the psittacosis shell bionic structure according to claim 1, wherein the diversion speed increasing cover (3) is cylindrical in shape.
9. The hybrid vertical axis wind turbine with the psittacosis shell bionic structure according to claim 1, wherein the diversion speed increasing cover (3) is fixed on the central fixing upright post (1) through a locking structure; The locking structure comprises an upper threaded lock catch (6) and a lower threaded lock catch (7) which are respectively in threaded fit with the central fixing upright post (1), and the top of the diversion speed increasing cover (3) is clamped by the upper threaded lock catch (6) and the lower threaded lock catch (7) in a matched mode.
10. The hybrid vertical axis wind turbine of a psittacosis shell bionic structure according to claim 1, wherein the airfoil profile of the psittacosis shell bionic blade (21) conforms to a logarithmic spiral.
11. The hybrid vertical axis wind turbine of a psittacosis shell bionic structure according to claim 1, wherein the central fixed upright post (1) is connected to a wind turbine base (8).
12. The method for utilizing wind energy of the hybrid vertical axis wind turbine with the psittacosis shell bionic structure according to claim 1, which is characterized by comprising the following steps: Step S1, first-stage wind energy capturing and wake flow generation Enabling ambient wind to act on the psittacosis shell bionic blades (21) of the primary wind wheel (2), so as to drive the primary wind wheel (2) to rotate around the central fixed upright post (1) to capture original wind energy and generate wake flow; Step S2, wake guiding and speed increasing The wake flow generated by the primary wind wheel (2) is guided to pass through a speed increasing slit (31) at the top of the diversion speed increasing cover (3) so as to accelerate the wake flow; Step S3, capturing secondary wind energy The air flow accelerated by the accelerating slit (31) enters the inner space of the diversion accelerating cover (3) and then acts on the lifting blades (41) of the secondary wind wheel (4), so that the secondary wind wheel (4) is driven to rotate around the central fixed upright post (1) independently of the primary wind wheel (2), and the secondary capture and conversion of wind energy are realized; and the step S1 to the step S3 are used for realizing sequential secondary energy conversion of the same wind energy.

Description

Mixed vertical axis wind turbine with psittacosis shell bionic structure and method Technical Field The invention belongs to the technical field of wind power generation, and particularly relates to a hybrid vertical axis wind turbine with a psittacosis shell bionic structure and a method. Background The existing vertical axis wind turbine cannot effectively act particularly in inland areas such as cities, densely populated villages and towns and the like in low wind speed environments. The wind turbine is affected by low wind speed, the starting performance is poor, the wind turbine is difficult to self-start and has low efficiency when the wind speed is lower than the rated value, single energy conversion efficiency is not ideal, most of airflow energy passing through the wind wheel is dissipated in a wake flow mode, the wind turbine cannot be effectively utilized, and the cascade utilization and the overall conversion efficiency improvement of wind energy cannot be realized in a compact structure. Disclosure of Invention The invention aims to: in order to overcome the defects in the prior art, the invention provides the hybrid vertical axis wind turbine with the psittacosis shell bionic structure and the method, which are characterized in that the first-stage bionic wind wheel captures and generates wake flow, the second-stage independent wind wheel is driven after the speed is increased by the guide cover, the problems that the vertical axis wind turbine is difficult to start and the single wind energy utilization rate is low at low wind speed are solved, and the low-speed running performance of the vertical axis wind turbine is improved. The technical scheme is that in order to achieve the purposes, the hybrid vertical axis wind turbine with the psittacosis shell bionic structure comprises: A central fixed upright post; The primary wind wheel comprises at least one psittacosis shell bionic blade, and the primary wind wheel is rotatably arranged at a first height position of the central fixed upright post and is used for receiving and utilizing original wind energy; the diversion speed increasing cover is fixedly arranged on the central fixed upright post and positioned on the leeward side of the primary wind wheel, and a speed increasing slit is formed in the top of the diversion speed increasing cover; The secondary wind wheel comprises at least one lifting type blade, and is rotatably arranged at a second height position of the central fixed upright post and positioned in an inner space surrounded by the wind-avoiding air guide cover; The tail generated by the primary wind wheel is guided into the diversion speed increasing cover through the speed increasing slit so as to drive the secondary wind wheel to rotate. Further, the primary wind wheel further comprises an upper blade connecting column, and the psittacosis shell bionic blades are connected to the upper blade connecting column in a circumferential array; The secondary wind wheel further comprises a lower blade connecting column, and a plurality of lift blades are connected to the lower blade connecting column in a circumferential array; The upper blade connecting column and the lower blade connecting column are of hollow shaft structures and are rotatably arranged on the central fixing upright column through bearing assemblies respectively. Further, the motor is connected to the upper blade and the motor is connected to the lower blade, the motor is connected to the upper blade connecting column correspondingly, and the motor is connected to the lower blade connecting column correspondingly. Further, the upper blade connecting motor and the lower blade connecting motor have the same structure, and respectively comprise: The motor shell is rotationally connected to the central fixed upright post through a motor bearing, and a permanent magnet is arranged on the motor shell; the coil winding plate is fixed on the central fixing upright post and is provided with a coil winding; The motor shell of the upper blade connecting motor is connected with the upper blade connecting column, and the motor shell of the lower blade connecting motor is connected with the lower blade connecting column. Further, the speed increasing slit is a slit structure with a cross-sectional area gradually reduced along the airflow direction. Further, the number of the speed increasing slits is multiple, and the speed increasing slits are uniformly distributed along the top circumference of the diversion speed increasing cover. Further, the bottom of the diversion speed increasing cover is open. Further, the outer shape of the diversion speed increasing cover is cylindrical. Further, the diversion speed increasing cover is fixed on the central fixing upright post through a locking structure; the locking structure comprises an upper thread lock catch and a lower thread lock catch which are respectively in threaded fit with the central fixing upright post, and the upper thre