CN114992057A - Wind power generation device and wind power generation method - Google Patents

Wind power generation device and wind power generation method Download PDF

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Publication number
CN114992057A
CN114992057A CN202210619387.3A CN202210619387A CN114992057A CN 114992057 A CN114992057 A CN 114992057A CN 202210619387 A CN202210619387 A CN 202210619387A CN 114992057 A CN114992057 A CN 114992057A
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China
Prior art keywords
shaft
wind
wind power
power generation
rotating speed
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Pending
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CN202210619387.3A
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Chinese (zh)
Inventor
伍洪少
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Individual
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Individual
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Priority to CN202210619387.3A priority Critical patent/CN114992057A/en
Publication of CN114992057A publication Critical patent/CN114992057A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D15/00—Transmission of mechanical power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/0204—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor for orientation in relation to wind direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/04—Automatic control; Regulation
    • F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/10—Combinations of wind motors with apparatus storing energy
    • F03D9/12—Combinations of wind motors with apparatus storing energy storing kinetic energy, e.g. using flywheels
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Abstract

The invention relates to the technical field of power generation devices, and discloses a wind power generation device and a wind power generation method. Based on the structure, the transmission shaft is vertically arranged, the length of the transmission shaft can be increased as required, the transmission shaft is not influenced by the balance of the tower and the structural stability, the torque can be increased, the lever effect is maximized, and the power of a larger generator can be matched; the driving motor is timely involved, so that wind energy, electric energy and power are intelligently mixed and complemented, the utilization of weak wind is maximized, the power generation efficiency is greatly improved, and the flywheel energy storage device enables the inertia force to work for a long time; the installation and the fixation of the generator are also facilitated.

Description

Wind power generation device and wind power generation method
Technical Field
The invention relates to the technical field of wind power generation, in particular to a wind power generation device and a wind power generation method.
Background
The wind generating set is a generating set which utilizes wind energy to generate electricity, the current horizontal axis wind generator is the most machine type in the prior production and installation, the structure of the wind generating set generally comprises a wind wheel, a transmission mechanism, a parking brake, a generator, a machine base, a tower frame, a speed regulator, a wind aligning device, an energy storage device, a controller and the like, and the wind wheel is connected with a speed-up gear box through a main shaft and drives the generator to generate electricity.
In the prior art, a generator part and a transmission system of a wind power generation device are usually positioned in a nacelle behind a wind wheel, which is not beneficial to the installation and fixation of the generator, and the generator needs to be hoisted to the top end of a tower, thus increasing the difficulty of inspection and maintenance, and having higher maintenance cost, more tower top end parts and higher gravity center; on the other hand, for stable structure, the transmission shaft is usually set to be short, so that the torque is relatively small, the transmission shaft is not matched with large fan blade power, the power generation efficiency is low, the operation is difficult in the initial stage of restarting after wind energy is small or static, a large wind speed is needed, the requirement on the minimum starting wind speed is high, and the utilization rate in the weak wind period is low.
Disclosure of Invention
The invention aims to provide a wind power generation device which has the advantages of large torque, wind energy and electric energy complementation, high power generation efficiency, lower gravity center and convenience in installation, upgrading and maintenance.
In order to achieve the above object, the present invention provides a wind power generation apparatus, comprising:
a tower;
the wind wheel is arranged at the top of the tower;
the first gearbox is arranged on the rear side of the wind wheel and connected with the wind wheel through a main shaft, and the main shaft extends in the horizontal direction;
the generator is arranged below the first gearbox and is connected with the first gearbox through a transmission shaft, and the transmission shaft is arranged along the vertical direction.
In some embodiments of the present application, a ratio of a length of the main shaft to a length of the drive shaft is not less than 1: 2.
Some embodiments of this application still include transmission, transmission includes first gear, second gear and second driven shaft, first gear is located the bottom of transmission shaft rotates along with it, the second gear set for at least two and all with first gear meshes mutually, the second gear is arranged along the horizontal direction, the second driven shaft the generator with second gear quantity is equal and the one-to-one, the second driven shaft is connected the second gear with the generator.
In some embodiments of the present application, the second gear is provided in plurality.
In some embodiments of this application, still include controller, driving motor, one way clutch and flywheel energy memory, one way clutch includes inner ring and outer loop, the transmission shaft is including the last shaft part and the lower shaft part that set up from top to bottom, goes up the shaft part and is provided with the axle sleeve, one way clutch's outer loop is connected with the axle sleeve linkage of last shaft part, one way clutch's inner ring with the lower shaft part is connected, driving motor with the lower shaft part is connected, flywheel energy memory with the second driven shaft is connected, driving motor with the equal electricity of controller is connected.
In some embodiments of the present application, the electric vehicle further includes a rotation speed sensor, the rotation speed sensor is disposed on the lower shaft section and is used for detecting the rotation speed of the lower shaft section, the controller is electrically connected to the rotation speed sensor and controls the driving motor to start when the rotation speed of the lower shaft section is lower than a predetermined rotation speed, and the lower shaft section stops working when the rotation speed is higher than the predetermined rotation speed.
In some embodiments of the present application, the first gearbox with the wind wheel is located respectively the both sides of transmission shaft, wind power generation set still includes two at least first driven shafts, first gearbox, two first driven shaft and the transmission shaft is transmission connection in proper order, connect through bevel gear transmission between the first driven shaft.
In some embodiments of the present application, the wind power generation apparatus further comprises a wind direction sensor disposed on the tower for detecting a real-time wind direction.
Another object of the present invention is to provide a wind power generation method, which includes the steps of:
acquiring the rotating speed of a lower shaft section of a transmission shaft;
when the rotating speed of the lower shaft section is lower than the preset rotating speed, controlling a driving motor to drive the lower shaft section to rotate, so that the rotor of the generator keeps the first preset rotating speed;
and when the rotating speed of the lower shaft section is greater than the preset rotating speed, controlling the driving motor to stop.
The invention provides a wind power generation device, compared with the prior art, the wind power generation device has the beneficial effects that:
the wind power generation device provided by the invention comprises a tower frame, a wind wheel, a first gearbox and a generator, wherein the wind wheel is arranged at the top of the tower frame, the first gearbox is arranged at the rear side of the wind wheel and is connected with the wind wheel through a main shaft, the main shaft extends along the horizontal direction, the generator is arranged below the first gearbox and is connected with the first gearbox through a transmission shaft, and the transmission shaft is arranged along the vertical direction.
(1) Based on the structure, compared with a pure horizontal shaft generator set, the transmission shaft is vertically arranged, so that the length of the transmission shaft can be increased as required, the transmission shaft is not influenced by tower balance and structural stability, the torque can be increased, and the power generation efficiency is greatly improved; secondly, the generator is arranged at the lower end of the tower, so that the bearing of the top end of the tower can be reduced, the integral gravity center of the system is lowered, the safety coefficient is enhanced, meanwhile, the sensitivity of the yaw system is improved, the fan blades can be more quickly and sensitively windward, the installation and the fixation of the generator are facilitated, the difficulty of inspection and maintenance is reduced, and the overhaul cost is lower.
(2) The transmission device is arranged to carry out secondary transmission to drive two or more generators to generate electricity, so that the torque is increased secondarily, and the generating efficiency is improved.
(3) The wind power generation device is provided with the driving motor, and the driving motor can be controlled to drive the transmission shaft to rotate when wind power is insufficient, namely when the rotating speed of the transmission shaft is lower than a preset rotating speed, so that the transmission shaft is always kept above the minimum rotating speed and drives the generator to work, the intelligent complementation of wind energy and electric energy is realized, the unstable characteristic of the wind energy is overcome, the power generation efficiency is integrally improved, and the response sensitivity of the wind wheel is improved.
(4) The invention also provides a wind power generation method, which enables the transmission shaft to be always maintained above the lowest rotating speed, thereby greatly improving the power generation efficiency of the generator.
Drawings
FIG. 1 is a schematic view of an overall structure of a wind power plant according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a wind power generation device according to an embodiment of the present invention.
In the figure: 1. a tower; 11. mounting a platform; 2. a wind wheel; 3. a first gearbox; 4. a generator; 5. a transmission device; 51. a second driven shaft; 6. a controller; 7. a drive motor; 8. a flywheel energy storage device; 9. a rotational speed sensor; 10. a one-way clutch; 100. a main shaft; 200. a drive shaft; 300. a first driven shaft; 400. a wind direction sensor; 500. yaw drive motor.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that in the description of the present application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application. The terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, i.e. a feature defined as "first", "second" may explicitly or implicitly include one or more of such features. Further, unless otherwise specified, "a plurality" means two or more.
It should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
As shown in fig. 1 and 2, an embodiment of the present invention provides a wind power generation apparatus, which includes a lightning arrester, a nacelle, a yaw system, a generator 4, a brake system, a controller 6, a tower 1, a wind wheel 2, a main shaft 100, a first gearbox 3, and a generator 4. The wind turbine generator is characterized in that the engine room and the wind turbine 2 are arranged at the top of the tower frame 1, one end of the lightning arrester is arranged at the tail of the wind turbine 2 and/or the top of the engine room, and the other end of the lightning arrester is grounded through a power line insulated from the tower frame 1, so that the effect of preventing the wind turbine 2 and components on the tower frame 1 from being damaged by lightning is achieved.
The wind wheel 2 is in transmission connection with the main shaft 100 and is a main part of a wind energy power source, wind power pushes the wind wheel 2, and the wind wheel 2 drives the main shaft 100 to rotate so as to transmit rotary power.
The yawing system is arranged in the engine room and is electrically connected with the controller 6, the yawing system comprises a gear disc, a wind direction sensor 400 and a yawing driving motor 500, the yawing driving motor 500 is used for driving the engine room to rotate, after the wind direction sensor 400 of the yawing system senses the wind direction, information is transmitted to the controller 6, the controller 6 sends a forward rotation instruction or a reverse rotation instruction to the yawing driving motor 500 of the yawing system, the yawing driving motor 500 drives the engine room to rotate around the circular gear disc, the direction of the whole engine room and the direction of the wind wheel 2 are adjusted in time, all parts and the wind wheel 2 in the whole engine room are enabled to face the wind along with the engine room, and the utilization of wind power is maximized.
The first gearbox 3 is arranged at the rear side of the wind wheel 2 and is positioned in the engine room, the first gearbox 3 is connected with the wind wheel 2 through a main shaft 100, and the main shaft 100 extends in the horizontal direction. Preferably, in order to balance the weight of the wind turbine 2 and prevent the wind turbine 2 from toppling over due to overweight, the main shaft 100 extends to the other side of the axis of the tower 1 along the horizontal direction, that is, the first gearbox 3 and the wind turbine 2 are respectively located at two sides of the axis of the tower 1, and a predetermined distance exists between the first gearbox 3 and the wind turbine 2, so that the weight of the nacelle and the weight of the wind turbine 2 are balanced, and the main shaft 100 is longer and the torque is larger. The generator 4 is arranged below the first gearbox 3 and outside the nacelle, and specifically, the tower frame 1 is provided with a support frame on which the generator 4 is arranged, the generator 4 is connected with the first gearbox 3 through a transmission shaft 200, and the transmission shaft 200 is arranged in the tower frame 1 and arranged along the vertical direction. Specifically, the transmission shaft 200 is connected to the first transmission case 3 through a bevel gear to realize transmission in a vertical direction, and a gear plate of the yaw system has a through hole through which the transmission shaft 200 passes and is connected to the generator 4. Preferably, when first gearbox 3 and wind wheel 2 are located the both sides of pylon 1 axis respectively, in order to carry out power transmission in arranging pylon 1 in considering transmission shaft 200 needs, this wind power generation set still includes two at least first driven shafts 300, first gearbox 3, two first driven shafts 300 and transmission shaft 200 are transmission connection in proper order, two first driven shafts 300 can specifically set up respectively to set up and set up along vertical direction and along the horizontal direction, the two passes through the bevel gear transmission and connects, thereby make and be located first gearbox 3 of pylon 1 one side can be with power transmission shaft 200, and then realize that the power transmission of horizontal direction changes into the power transmission of vertical direction.
Based on the structure, compared with a pure horizontal shaft generator 4 group, the transmission shaft 200 is vertically arranged, so that the length of the transmission shaft 200 can be increased as required, the transmission shaft is not influenced by the balance of the tower 1 and the structural stability, the torque can be increased, and the power generation efficiency is greatly improved; secondly, the generator 4 is arranged at the lower end of the tower frame 1, so that the bearing of the top end of the tower frame 1 can be reduced, the integral gravity center of the system is lowered, the safety of the system is improved, the sensitivity of the yaw system is improved, the fan blades can be windward more quickly and sensitively, the installation and the fixation of the generator 4 are facilitated, the difficulty of inspection and maintenance is reduced, and the overhaul cost is low.
Alternatively, as shown in fig. 1 and 2, in the present embodiment, the ratio of the length of the main shaft 100 to the length of the transmission shaft 200 is not less than 1: 2. Based on this, the length and structural arrangement of the propeller shaft 200 may further increase the transmitted torque, thereby further improving the power generation efficiency of the generator 4.
Optionally, as shown in fig. 1 and fig. 2, in this embodiment, the wind power generation apparatus further includes a transmission device 5, the transmission device 5 includes a first gear, a second gear and a second driven shaft 51, the first gear is disposed at the bottom of the transmission shaft 200 and rotates therewith, the second gear is at least two and is engaged with the first gear, the second gear is arranged along the horizontal direction, the second driven shaft 51 and the generators 4 are equal in number and in one-to-one correspondence with the second gear, and the second driven shaft 51 connects the second gear and the generators 4. The second driven shaft 51 can further increase the torque, providing an advantageous condition for increasing the generated power.
Alternatively, as shown in fig. 1, in the present embodiment, the second gear is provided in two or more. When the second gear is provided in two, the two second gears are provided outside the propeller shaft 200 and are symmetrically arranged. Therefore, the transmission device 5 is arranged to carry out secondary transmission to drive two or more generators 4 to generate electricity, so that the torque is increased secondarily, and the generating efficiency is improved. In addition, the transmission device 5 with symmetrical arrangement can enable the output power at two sides to be more symmetrical, even, balanced and powerful, thereby better driving the generator 4 to generate electricity.
Optionally, as shown in fig. 1 and fig. 2, in the present embodiment, the wind power generation apparatus further includes a mounting platform 11, the mounting platform 11 is disposed on the tower 1, the generator 4 is mounted on the mounting platform 11, and the second driven shaft 51 is mounted on the mounting platform 11 through a bearing and a bearing seat. The mounting platform 11 is arranged to support the generator 4 for installation and maintenance.
Optionally, as shown in fig. 1 and fig. 2, in this embodiment, the wind power generation device further includes flywheel energy storage devices 8, the number of the flywheel energy storage devices 8 is equal to that of the second driven shafts 51, and the flywheel energy storage devices 8 are disposed on the outer sides of the second driven shafts 51 and connected thereto, specifically, the flywheel energy storage devices 8 include a wheel disc disposed at any point on the second driven shafts 51. Due to the adoption of the flywheel energy storage device 8, wind energy can be converted into mechanical energy for storing energy when the wind power is greater than the power generation requirement, the mechanical energy of the flywheel is converted into electric energy when the wind power is lower than the power generation requirement or within the power generation requirement, and the generator 4 can rotate more stably, durably and powerfully by utilizing the gravity and inertia potential energy stored in the flywheel, so that the energy is further saved, the consumption is reduced, and the power generation efficiency is improved.
Optionally, as shown in fig. 1 and fig. 2, in this embodiment, the wind power generation device further includes a controller 6, a driving motor 7, and a one-way clutch 10, the driving motor 7 is electrically connected to the controller 6, the transmission shaft 200 is divided into two shaft sections, the two shaft sections are in transmission connection through the one-way clutch 10, the one-way clutch 10 may be in an arrangement form of connection in a shaft sleeve or external connection of a gear, and preferably, the one-way clutch 10 is in an arrangement form of engagement connection in a shaft sleeve. Specifically, the one-way clutch 10 includes an inner ring and an outer ring, the outer ring is provided with teeth, an upper shaft section of the transmission shaft is provided with a shaft sleeve, the shaft sleeve is provided with teeth, the shaft sleeve is meshed with the outer ring to be connected, so that the upper shaft section can drive the outer ring to rotate, the inner ring sleeve is arranged outside a lower shaft section of the transmission shaft 200 and can drive the transmission shaft to rotate, the outer ring and the inner ring are respectively provided with a ratchet wheel and a pawl, so that the outer ring can drive the inner ring to rotate, the inner ring cannot drive the outer ring to rotate when rotating, and the driving motor 7 is connected with the lower shaft section of the transmission shaft 200. Preferably, the shaft of the rotor of the drive motor 7 is directly in meshing connection with the inner ring, so that the structure is compact. Thus, when the wind power is insufficient, that is, when the rotating speed of the first gearbox 3 is lower than the preset rotating speed, the invention is provided with the driving motor 7 which can drive the transmission shaft 200 to rotate independently, and also can rotate simultaneously with the first driven shaft 300 in a coaxial asynchronous transmission mode without mutual interference, the transmission shaft 200 is driven to generate electricity by the low-speed auxiliary wind energy of the high-efficiency and low-energy-consumption motor, so that the transmission shaft 200 is always kept above the lowest rotating speed and drives the generator 4 to work, thereby overcoming the difficult period of each wind energy starting, reducing abnormal wear of parts, prolonging the service life of parts, overcoming the defect that the requirement of wind energy starting on the initial wind speed is high, assisting the low-speed starting period of the wind energy to quickly increase the rotating speed, reducing the requirement of the lowest starting wind speed of fan blades, and enabling the generator 4 to work in a high-efficiency interval all the time, thereby realizing the intelligent complementation of the wind energy and the electric energy and overcoming the unstable characteristic of the wind energy, the generating efficiency is integrally improved, and the reaction sensitivity of the wind wheel 2 is improved. When the wind power is large, the driving motor 7 is set to idle, and the first driven shaft 300 directly drives the transmission shaft 200 to rotate.
Optionally, as shown in fig. 1 and fig. 2, in the present embodiment, the wind power generation apparatus further includes a rotation speed sensor 9, the rotation speed sensor 9 is disposed on the transmission shaft 200 and is configured to detect a rotation speed of the transmission shaft 200, and the controller 6 is electrically connected to the rotation speed sensor 9 and controls the driving motor 7 to be activated when the rotation speed of the transmission shaft 200 is lower than a predetermined rotation speed. Therefore, the rotation speed of the transmission shaft 200 can be obtained to judge whether the wind power is insufficient, so that the starting logic of the driving motor 7 is optimized, and the transmission shaft 200 is ensured to be always maintained above the lowest rotation speed, specifically, when the wind power is in a weak period or is static, the rotation speed sensor 9 arranged on the kinetic energy machine part transmits information to the controller 6, the controller 6 sends a starting instruction to the driving motor 7, and the driving motor 7 drives the transmission shaft 200 of the inner ring of the one-way clutch 10 to rotate, so as to drive the generator 4 to generate electricity. Preferably, when the rotation speed acquired by the rotation speed sensor 9 is higher than a predetermined rotation speed, the driving motor 7 is controlled to be turned off so as to be in a no-load idle state and to rotate along with the transmission shaft 200.
Alternatively, as shown in fig. 1 and 2, in the present embodiment, the braking system is disposed on the tower 1 and electrically connected to the controller 6. When the rotating speed sensor 9 senses that the rotating speed of the wind energy exceeds a rated value, information is transmitted to the controller 6, and the controller 6 sends a braking and speed reducing instruction to the braking system to reduce the speed, so that abnormal damage to parts caused by too high wind speed is prevented.
The embodiment of the invention also provides a wind power generation method, which comprises the following steps:
acquiring the rotating speed of the lower shaft section of the transmission shaft 200;
when the rotating speed of the lower shaft section is lower than the preset rotating speed, controlling the driving motor 7 to drive the lower shaft section to rotate, so that the rotor of the generator 4 keeps the first preset rotating speed;
and controlling the driving motor 7 to stop when the rotating speed of the lower shaft section is greater than the preset rotating speed.
Based on this, the method enables the lower shaft section of the transmission shaft 200 to be always maintained above the lowest rotating speed, thereby greatly improving the generating efficiency of the generator 4.
To sum up, the embodiment of the present invention provides a wind power generation apparatus, which mainly comprises a tower frame 1, a wind wheel 2, a first gearbox 3 and a generator 4, wherein the wind wheel 2 is arranged at the top of the tower frame 1, the first gearbox 3 is arranged at the rear side of the wind wheel 2 and is connected with the wind wheel 2 through a main shaft 100, the main shaft 100 extends along the horizontal direction, the generator 4 is arranged below the first gearbox 3 and is connected with the first gearbox 3 through a transmission shaft 200, and the transmission shaft 200 is arranged along the vertical direction. Compared with the prior art, the wind power generation device has the advantages of high power generation efficiency, convenience in installation and maintenance and the like.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims (9)

1. A wind power plant, characterized by comprising:
a tower;
the wind wheel is arranged at the top of the tower;
the first gearbox is arranged on the rear side of the wind wheel and connected with the wind wheel through a main shaft, and the main shaft extends in the horizontal direction;
the generator is arranged below the first gearbox and is connected with the first gearbox through a transmission shaft, and the transmission shaft is arranged along the vertical direction.
2. A wind power plant as claimed in claim 1, characterized in that:
the ratio of the length of the main shaft to the length of the transmission shaft is not less than 1: 2.
3. A wind power plant as claimed in claim 2, characterized in that:
still include transmission, transmission includes first gear, second gear and second driven shaft, first gear is located the bottom of transmission shaft rotates along with it, the second gear establish into at least two and all with first gear meshes mutually, the second gear is arranged along the horizontal direction, the second driven shaft the generator with second gear quantity is equal and the one-to-one, the second driven shaft is connected the second gear with the generator.
4. A wind power plant as claimed in claim 3, characterized in that:
the second gear is provided in plurality.
5. A wind power plant as claimed in claim 3, characterized in that:
the transmission shaft comprises an upper shaft section and a lower shaft section which are arranged from top to bottom, the upper shaft section is provided with a shaft sleeve, the outer ring of the one-way clutch is in linkage connection with the shaft sleeve of the upper shaft section, the inner ring of the one-way clutch is connected with the lower shaft section, the driving motor is connected with the lower shaft section, the flywheel energy storage device is connected with the second driven shaft, and the driving motor is electrically connected with the controller in a uniform mode.
6. The wind power plant of claim 5, wherein:
the controller is electrically connected with the rotating speed sensor and controls the driving motor to start when the rotating speed of the lower shaft section is lower than a preset rotating speed, and the lower shaft section stops working when the lower shaft section is higher than the preset rotating speed.
7. A wind power plant as claimed in claim 1, characterized in that:
the first gearbox and the wind wheel are respectively located on two sides of the transmission shaft, the wind power generation device further comprises at least two first driven shafts, the first gearbox, the two first driven shafts and the transmission shaft are sequentially in transmission connection, and the first driven shafts are in transmission connection through bevel gears.
8. The wind power plant of claim 5, wherein:
the wind power generation device further comprises a wind direction sensor arranged on the tower and used for detecting the real-time wind direction.
9. A method of wind power generation, comprising the steps of:
acquiring the rotating speed of a lower shaft section of a transmission shaft;
when the rotating speed of the lower shaft section is lower than the preset rotating speed, controlling a driving motor to drive the lower shaft section to rotate, so that the rotor of the generator keeps the first preset rotating speed;
and when the rotating speed of the lower shaft section is greater than the preset rotating speed, controlling the driving motor to stop.
CN202210619387.3A 2022-06-01 2022-06-01 Wind power generation device and wind power generation method Pending CN114992057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210619387.3A CN114992057A (en) 2022-06-01 2022-06-01 Wind power generation device and wind power generation method

Applications Claiming Priority (1)

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CN202210619387.3A CN114992057A (en) 2022-06-01 2022-06-01 Wind power generation device and wind power generation method

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