LU504401B1 - A wind turbine with wind resistance reduction blades - Google Patents

A wind turbine with wind resistance reduction blades Download PDF

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Publication number
LU504401B1
LU504401B1 LU504401A LU504401A LU504401B1 LU 504401 B1 LU504401 B1 LU 504401B1 LU 504401 A LU504401 A LU 504401A LU 504401 A LU504401 A LU 504401A LU 504401 B1 LU504401 B1 LU 504401B1
Authority
LU
Luxembourg
Prior art keywords
generator
shaft
nacelle
electromagnetic
wing blade
Prior art date
Application number
LU504401A
Other languages
French (fr)
Inventor
Qiang Pan
Yongkang Wang
Jun Li
Junwei Guo
Tianlong Yao
Lingling Wu
Wanliang Dou
Jie Song
Xiaoming Yu
Original Assignee
Huaneng Xinjiang Qinghe Wind Power Generation Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huaneng Xinjiang Qinghe Wind Power Generation Co Ltd filed Critical Huaneng Xinjiang Qinghe Wind Power Generation Co Ltd
Application granted granted Critical
Publication of LU504401B1 publication Critical patent/LU504401B1/en

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Classifications

    • 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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/0608—Rotors characterised by their aerodynamic shape
    • F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
    • F03D1/06495—Aerodynamic elements attached to or formed with the blade, e.g. flaps, vortex generators or noise reducers
    • 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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • 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
    • F03D7/022—Adjusting aerodynamic properties of the blades
    • F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
    • 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
    • F03D7/022—Adjusting aerodynamic properties of the blades
    • F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
    • F03D7/0239—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling by means of teetering or coning blades
    • 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
    • F03D7/0264—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor for stopping; controlling in emergency situations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/306—Surface measures
    • F05B2240/3062—Vortex generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2270/00—Control
    • F05B2270/60—Control system actuates through
    • F05B2270/606—Control system actuates through mechanical actuators
    • 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

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Power Engineering (AREA)
  • Wind Motors (AREA)

Abstract

The invention relates to a wind turbine with wind resistance reduction blades comprising: a tower, a nacelle, a generator, a speed limiting stop device, an electric folding device, a wing blade, a vortex generator; said nacelle is fixed to said tower; said generator is provided in said nacelle and said speed limiting stop device is connected to said generator shaft. The invention is able to reduce the blade resistance and increase the blade speed at low wind speeds by means of the wing blade and the vortex generator, and to protect the wind generator by means of said electric folding device, which folds the blade at higher wind speeds.

Description

A wind turbine with wind resistance reduction blades 0506607
Technical field
The present invention relates to the technical field of wind power generation and more specifically to a wind turbine with wind resistance reduction blades.
Background technology
Wind power is a kind of power machine that converts wind energy into mechanical energy, and the wind generator is a power device that uses wind energy to drive the blades to rotate and eventually output AC electricity, which has good application prospects.
The power generated by the wind generator is proportional to the swept area of the wind wheel, and in the same swept area, the faster the rotation speed of the blade, the greater the power generation, so the three-blade wind generator is commonly used, but the three-blade wind generator currently has the problem of wind resistance and how to make the blade rotation speed faster in the case of limited wind speed The problem of reducing the wind resistance and increasing the rotational speed of the blades on the basis of the existing wind power generator blades is therefore a problem that needs to be solved by those skilled in the art.
Content of the invention
In view of this, the present invention provides a wind turbine with wind resistance reduction blades.
The present invention provides A wind turbine with wind resistance reduction blades comprising: tower, nacelle, generator, wing blade, vortex generator, wherein: said tower is fixed vertically to the ground, said nacelle is fixed to the top of said tower, said generator is fixed within said nacelle with the front end of its generator shaft penetrating along the front end of said nacelle, and a plurality of said wing blades along the axis of said generator shaft in a circular array and mounted on the shaft wall at the pierced end thereof, said vortex generator being fixed in position at the trailing edge of said wing blade.
In some embodiments of the present invention, further comprising a speed limiting stop device comprising: a temperature sensor, an electromagnetic retarder mechanism, an electromagnetic friction mechanism and a controller;
Preferably, said generator is a dual shaft generator with two generator shafts divided into a generator shaft front shaft and a generator shaft rear shaft; and penetrating along the front and rear ends of said nacelle respectively, said wing blade being mounted on the shaft wall of sad 904401 generator shaft front shaft; preferably, said temperature sensor is fixedly provided on the inner wall of said nacelle in proximity to said generator; preferably, said electromagnetic retarder mechanism is fixedly provided on the inner wall of said nacelle tail, said controller being able to control said electromagnetic retarder mechanism according to said temperature sensor data said controller is further electrically connected to said electromagnetic friction mechanism, said controller being able to control the operation of said electromagnetic retarder mechanism according to the duration of operation of said electromagnetic said controller is capable of controlling the operation of said electromagnetic friction mechanism according to the duration of operation of said electromagnetic retarder mechanism;
In some embodiments of the present invention, said electromagnetic retarder mechanism comprises a fixed bracket, a stator coil and a rotor, said fixed bracket being provided with a rotor hole in the middle of said rotor hole and being snapped through said rotor hole to said generator shaft said fixed bracket is provided with a rotor hole in the middle of said fixed bracket, and through said rotor hole is located on the outside of said generator shaft rear shaft, and the end is fixed to the inner wall of said nacelle, which has a coil cavity inside the side wall, and said stator coil is installed in said coil cavity, and said rotor sleeve is fixedly connected to said generator shaft rear shaft, and can be driven by said generator said rotor sleeve being fixedly connected to said generator shaft rear shaft, being capable of being driven by said generator shaft rear shaft to rotate within said rotor bore;
In some embodiments of the present invention, said electromagnetic friction mechanism comprises: an electromagnetic block, a brake stop plate, a reset spring, a stopper; said electromagnetic block having a central avoidance hole in the middle of said electromagnetic block and is set in the penetration end of said generator shaft rear shaft, with a clearance between it and the shaft wall of said generator shaft rear shaft and fixed to the outer wall of said nacelle, said brake stop plate being slidingly connected to said generator shaft rear shaft by means of a slide said brake stop plate is slidably attached to said generator shaft rear shaft by means of a slide, opposite said electromagnetic block, said brake stop plate sliding axially along said generator shaft rear shaft, said reset spring being located on said generator shaft rear said brake. 504401 stop plate can be reset by means of said reset spring, said stopper being fixed to the end of said generator shaft said stopper is fixed to the end of the rear shaft, limiting the sliding distance between said brake stop plate and said electromagnetic block; said controller is fixed in said nacelle and is electrically connected to said temperature sensor, said stator coil and said electromagnetic block, when the wind speed is high and the heat generated by said generator is too high, said temperature sensor transmits a signal to said controller, said controller controls said stator coil to energize a magnetic field, at which time said rotor rotates and cuts the magnetic field, generating an electromagnetic force that inhibits the rotation of said generator shaft rear shaft and reduces the rotation speed of said generator shaft rear shaft, when said generator coil works for a certain time, said controller transmits a signal to said electromagnetic block, said electromagnetic block generates a magnetic force, said brake stop plate moves in the direction of said electromagnetic block under the action of the magnetic force and fits against it, and the two rub against each other, causing said generator shaft when the temperature drops to a certain value, said temperature sensor transmits a signal to the controller, which controls said stator coil and said electromagnetic block to stop working and said generator shaft rear shaft to resume rotation;
In an embodiment of the invention, further comprising an electric opening and closing device, said electric opening and closing device comprising an electro-hydraulic push rod, an articulated joint, a folding device; preferably, said two movable pages of said folding device are fixed to the penetrating end of said generator shaft rear shaft and to the inner wall of said wing blade respectively;
Preferably, said electro-hydraulic push rod is connected at both ends to an articulated joint and is electrically connected to said controller, both said articulated joints being fixed respectively to the penetration end of said generator shaft rear shaft and to the corresponding said inner wall of said wing blade, said electro-hydraulic push rod being able to drive said wing blade to oscillate with said folding device when said electro-hydraulic push rod is telescoped;
Preferably, when the wing blade stops working, said controller will control said electro-hydraulic push rod to contract so that said wing blade folds in the direction of said nacelle, and when said wing blade starts working, said controller controls said electro-hydraulic push rod to elongate so that said wing blade returns to its original position; 0506607 preferably, the brake stop plate and the electro-hydraulic block are each provided with a friction surface on their corresponding working surfaces; preferably, at the joint of said wing blade, near said generator shaft, there is an angle cut and the shape of the angle cut matches the shape of the outer wall of the front end of said nacelle, said angle cut having an avoidance opening corresponding to said electro-hydraulic push rod; preferably, said electro-hydraulic push rod stops working when said wing blade 1s fitted to said nacelle against the tangent angle, at which point the maximum angle at which the wing blade 1s closed; preferably, said wing blade 1s fixedly attached to said folding device movable sheet by means of a bolt; preferably, said electromagnetic block is provided with an insulation layer between the friction surface of said electromagnetic block and the surface of said electromagnetic block; preferably, said nacelle is provided with a heat sink corresponding to the position above said generator mounting position;
The invention provides a wind turbine with wind resistance reduction blades, the wing shape is chosen as an aircraft wing shape, which can effectively reduce the wind resistance of the blade, by installing a vortex generator at the rear of the wing blade, the airflow can be prevented from separating prematurely, which affects the lift of the wing blade and thus reduces the rotation speed of the wing blade. The installation of a vortex generator will further reduce the resistance of the wing blade, solving the wind resistance problem of current wind generators, and increasing the speed of the blade rotation under limited wind speed.
Other features and advantages of the present invention will be set out in the subsequent specification and, in part, will become apparent from the specification or from the implementation of the invention. The objects and other advantages of the present invention may be achieved and obtained by means of the structures particularly indicated in the written specification, the claims, and the accompanying drawings.
The technical solutions of the invention are described in further detail below by means of the accompanying drawings and embodiments.
Description of the accompanying drawings 0506607
In order to illustrate more clearly the technical solutions in the embodiments or prior art of the present invention, the following is a brief description of the accompanying drawings which are required for use in the description of the embodiments or prior art. It is obvious that the 5 accompanying drawings in the following description are only embodiments of the present invention and that other accompanying drawings may be obtained by a person of ordinary skill in the art without creative labour in accordance with the accompanying drawings provided.
Figure 1 attached shows a schematic diagram of the structure of the invention.
Figure 2 shows a schematic diagram of the speed limiting stop device.
Figure 3 shows a schematic diagram of the structure of the electric opening and closing device.
In figures: 1-tower, 2-nacelle; 3-generator; 4-generator shaft; 5-wing blade; 6-vortex generator, 7-temperature sensor; 8-controller; 9-electromagnetic retarder mechanism; 10-electromagnetic friction mechanism; 11-electric opening and closing device; 15-speed limiting stop device; 16-heat sink; 18-bolt; 41-generator shaft front shaft; 42-generator shaft rear shaft; 91-fixed bracket; 92-stator coil; 93-rotor; 101-electromagnetic block; 102-brake stop plate; 103-reset spring; 104-stopper; 112-electro-hydraulic push rod; 113-articulated joint; 115-folding device.
Specific embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention, it being clear that the embodiments described are only a part of the embodiments of the present invention and not all of them. Based on the embodiments in the present invention, all other embodiments obtained without creative labour by a person of ordinary skill in the art fall within the scope of protection of the present invention.
In the description of this application, it is to be understood that the terms "centre", "top", "bottom", "front" , "back", "left", "right", "vertical", "horizontal ", "top", "bottom", "inside", "outside", etc. orientation or positional relationships are based on those shown in the accompanying drawings and are intended only to facilitate and simplify the description of the present application, not to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore are not 504401 to be construed as limiting the present application.
The terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or as implicitly specifying the number of technical features indicated. Thus, a feature qualified with "first" and "second" may explicitly or implicitly include one or more such features. In the description of this application, unless otherwise stated, "plurality" means two or more.
In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "mounted", "connected", "connected" are to be understood in a broad sense, for example, as fixed connection, removable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium, or internal connection of two components. For a person of ordinary skill in the art, the specific meaning of the above terms in the context of the present application can be understood in specific cases.
Embodiments of the present invention disclose a wind turbine with wind resistance reduction blades comprising: tower 1, nacelle 2, generator 3, wing blade 5, vortex generator 6, wherein:
Tower 1 is fixed vertically to the ground, nacelle 2 is fixed to the top of tower 1, generator 3 is fixed in nacelle 2 with the front end of generator shaft 4 piercing out along the front end of nacelle 2, and a plurality of wing blades 5 are arranged in a circular array along the axis of generator shaft 4 and The vortex generator 6 is fixed at the rear edge of the wing blade 5.
The airfoil shape of this embodiment is chosen as an aircraft airfoil, which can effectively reduce the wind resistance of the blade. By installing vortex generator6 at the tail of wing blade 5, the airflow can avoid premature separation, which affects the lift of wing blade 5, thus making the rotation speed of wing blade 5 lower, and installing vortex generator 6 will also The installation of the vortex generator 6 will also further reduce the resistance of the wing blade 5, solving the current wind resistance problem of the wind generator blade and also increasing the speed of the blade rotation under limited wind speed.
In order to prevent the generator 3 from rotating too fast due to excessive wind speed, which causes the generator 3 to overheat internally and thus affects the lifetime of the generator
3, on the basis of embodiment 1, embodiment 2 is included, in which embodiment 2 also 504401 includes a speed limiting stop device 15, comprising: a temperature sensor 7, an electromagnetic retarder mechanism 9, an electromagnetic friction mechanism 10 and a controller 8; wherein the generator 3 is a two-shaft generator with two generator shafts 4 divided into generator shaft front shaft 41 and generator shaft rear shaft 42; and penetrating along the front and rear ends of the nacelle 2, respectively, and wing blade 5 is mounted on the shaft wall of the generator shaft front shaft 41; a heat sink 16 is located above the nacelle 2 in relation to the generator 3 installation, and a temperature sensor 7 is fixed to the inner wall of the nacelle 2 near the generator 3;
The electromagnetic retarder mechanism 9 is fixed to the inner wall of the rear of the nacelle 2, the controller 8 is able to control the operation of the electromagnetic retarder mechanism 9 according to the data of the temperature sensor 7. The controller 8 is also electrically connected to the electromagnetic friction mechanism 10 and the controller 8 is able to control the operation of the electromagnetic friction mechanism 10 according to the operating time of the electromagnetic retarder mechanism 9. mechanism 10 operating according to the duration of operation of electromagnetic retarder mechanism 9;
The electromagnetic retarder mechanism 9 comprises a fixed bracket 91, a stator coil 92 and a rotor 93, the fixed bracket 91 being provided with a rotor hole in the middle of the bracket 91 and being snapped through the rotor hole to the outside of the generator shaft rear The fixed bracket 91 is provided with a rotor hole in the middle of the fixed bracket 91 and is fixed on the inner wall of the nacelle 2 through the rotor hole, and the end of the rotor hole is fixed on the inner wall of the nacelle 2, and the side wall of the nacelle 2 is provided with a coil cavity inside the coil cavity, and the stator coil 92 is installed in the coil cavity. the rotor 93 is fixedly connected to the generator shaft rear shaft 42 and can be driven by the generator shaft rear shaft 42 to rotate in the rotor bore;
The electromagnetic friction mechanism 10 comprises: electromagnetic block 101, brake stop plate 102, reset spring 103, stopper 104; electromagnetic block 101 has a hole in the middle of the block, and is fitted to the end of the generator shaft rear shaft 42, and is connected to the shaft wall of the generator shaft rear shaft 42. The brake stop plate 402 is slidingly attached to the generator shaft rear shaft 42 by means of a slide rail, opposite the electromagnetic block 101,
and the brake stop plate 102 slides axially along the generator shaft rear shaft 42. The brake stop 904401 plate 102 slides axially along the generator shaft rear shaft 42, the reset spring 103 is located on the generator shaft rear shaft 42 and is between the electromagnetic block 101 and the brake stop plate 102, corresponding to the avoidance hole, so that the brake stop plate 102 can be reset by the reset spring 103, and the stopper 104 is fixed to the generator shaft rear shaft 42. 104 is fixed at the exit end of the generator shaft rear shaft 42 to limit the sliding distance between brake stop plate 102 and electromagnetic block 101; controller 8 is fixed in nacelle 2 and is electrically connected to temperature sensor 7, stator coil 92 and electromagnetic block 101 respectively;
When the wind speed is low and the generator 3 is working, the small amount of heat generated can be discharged through the heat sink 16 above the generator 3. When the wind speed is too high and the heat sink 16 above the generator 3 is not able to remove a large amount of heat in time, temperature sensor 7 will come into play. The microprocessor in temperature sensor 7 sets a maximum temperature, and when the temperature of generator 3 is higher than the maximum temperature, temperature sensor 7 will send a signal to controller 8, which will control stator coil 92 to generate a magnetic field, at which point rotor The rotor 93 rotates and cuts the magnetic field, generating an electromagnetic force that inhibits the rotation of the generator shaft rear shaft 42 and reduces the rotation speed of the generator shaft rear shaft 42; when the stator coil 92 works for a certain period of time, controller 8 transmits the signal to electromagnetic block 101, electromagnetic block 101 generates magnetic force, brake stop plate 102 moves in the direction of electromagnetic block 101 under the action of magnetic force, and fits with it, brake stop plate 102 and When the temperature drops to the normal temperature value set by the microprocessor, the temperature sensor 7 transmits the signal to the controller 8, which controls the stator coil 92 and the electromagnetic block 101 to stop. When the temperature drops to the normal temperature set by the microprocessor, the temperature sensor 7 transmits the signal to controller 8, which controls the stator coil 92 and the electromagnetic block 101 to stop and the generator shaft rear shaft 42 to resume rotation.
The speed limiting stop device 15 of this embodiment effectively slows down the generator shaft 4, preventing the generator shaft 4 from rotating too fast and generating a lot of heat, which reduces the service life of the wind turbine.
When the wind generator stops rotating, the wind generatorwing blade 5 is still facing the wind, so it generates a force that makes the wind generator rotate, and at this time the wind 504401 generatorwing blade 5 is subjected to a large force, which has a great impact on the life of the wind generator. Therefore, in order to make the wind generatorwing blade 5 withstand as little force as possible when the wind generator stops working, Example 3 is added to Example 1, in which an electric opening and closing device 11 is provided, and the electric opening and closing device 11 comprising an electro-hydraulic push rod 112, an articulated joint 113, a folding device 115;
The two movable pages of the folding device 115 are fixed to the inner wall of the wing blade 5 and to the end of the generator shaft rear shaft 42 respectively, and one movable page of the folding device 115 is fixed to the wing blade 5 by means of bolt 18, which enables the folding of the wing blade 5 The folding device 115 is fixed to the wing blade 5 by means of bolt 18;
The electro-hydraulic push rod 112 is connected to an articulated joint 113 at both ends and is electrically connected to the controller 8, the two articulated joints 113 are fixed to the end of the generator shaft rear shaft 42 and to the inner wall of the corresponding When the electro-hydraulic push rod 112 is retracted, the wing blade 5 can be swung with the folding device 115.
When the wing blade 5 stops working, the controller 8 will control the electro-hydraulic push rod 112 to contract, causing the wing blade 5 to fold towards the nacelle 2, and when the wing blade 5 starts working, the controller 8 will control the electro-hydraulic push rod 112 to extend, causing the wing blade 5 to return to its original position. hydraulic push rod 112 extends so that wing blade 5 returns to its original position.
In order to maximise the angle at which the wing blade 5 folds, a cut-out is provided at the joint of the wing blade 5, near the generator shaft 4, and the shape of the cut-out matches the shape of the outer wall at the front of the nacelle 2, with an opening in the cut-out corresponding to the electro-hydraulic push rod 112. This design prevents the creation of vortices behind the wing blade 5 that could increase wind resistance due to the large opening.
By adding Example 3 to Example 1, Example 3 enables the opening and closing of wing blade 5, which can be achieved when the generator shaft stops rotating and can be closed in the direction of nacelle 2, reducing the windward area of wing blade 5 as much as possible and reducing the burden on the speed limiting stop device. When the generator shaft is rotated again. 04401 the wing blade 5 can be returned to its original position, with the maximum area facing the wind, thus realising the automatic opening and closing of the wind generator wing blade 5.
The individual embodiments in this specification are described in a progressive manner, with each embodiment focusing on what is different from the other embodiments, and the same similar parts between the individual embodiments can be referred to each other. For the device disclosed in the embodiments, the description is simpler as it corresponds to the method disclosed in the embodiments, and the relevant parts can be described in the method section.
The above description of the disclosed embodiments enables the person skilled in the art to implement or use the invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the invention. Accordingly, the invention will not be limited to these embodiments shown herein, but will be subject to the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

CLAIMS LU504401
1. À wind turbine with wind resistance reduction blades, characterized in that it comprises: a tower, a nacelle, a generator, a wing blade, a vortex generator, wherein: said tower is fixed vertically to the ground, said nacelle is fixed to the top of said tower, said generator is fixed within said nacelle with the front end of its generator shaft penetrating along the front end of said nacelle, and a plurality of said wing blades are mounted along the axis of said generator shaft in a circular array and mounted on the shaft wall at the pierced end thereof, said vortex generator being fixed in position at the trailing edge of said wing blade.
2. A wind turbine with wind resistance reduction blades according to claim 1, characterized in that it further comprises a speed limiting stop device, said speed limiting stop device comprising: a temperature sensor, an electromagnetic retarder mechanism, an electromagnetic friction mechanism and a controller, said generator is a dual shaft generator with two generator shafts divided into a generator shaft front shaft and a generator shaft rear shaft; and penetrating respectively along the front and rear ends of said nacelle, said wing blade being mounted on said said wing blade is mounted on the shaft wall of said generator shaft front shaft, said temperature sensor being fixedly provided on the inner wall of said nacelle in proximity to said generator, said electromagnetic retarder mechanism being fixed to the inner wall of the tail of said nacelle, said controller being able to control the operation of said electromagnetic retarder mechanism according to said temperature sensor data said controller is also electrically connected to said electromagnetic friction mechanism, said controller being able to control the operation of said electromagnetic friction mechanism according to the duration of operation of said electromagnetic retarder mechanism said controller is capable of controlling the operation of said electromagnetic friction mechanism in accordance with said duration of operation of said electromagnetic retarder mechanism, said electromagnetic retarder mechanism comprises a fixed bracket, a stator coil and a rotor, said fixed bracket having a rotor hole in the middle of said rotor hole, through which said rotor hole is snapped to the outside of said generator shaft rear shaft said fixed bracket is provided with a rotor aperture in the middle of said fixed bracket, which is fixed to the inner wall of sald 904401 nacelle through said rotor aperture, and the end of which is fixed to the inner wall of said nacelle, the inner side wall of which is provided with a coil cavity, said stator coil being mounted in said coil cavity, said rotor sleeve being fixedly attached to said generator shaft rear shaft and capable of being driven by said generator shaft rear shaft rotating in said rotor bore, said electromagnetic friction mechanism comprising: electromagnetic block, brake stop plate, reset spring, stopper; said electromagnetic block has a central avoidance hole and is set in said said brake-stop plate is slidingly attached to said generator shaft rear shaft by means of a slide and is connected to said electromagnetic block said brake stop plate slides axially along said generator shaft rear shaft, said reset spring is positioned on said generator shaft rear shaft and is between said electromagnetic block and said brake stop plate. between said electromagnetic block and said brake stop plate, corresponding to said avoidance aperture, capable of resetting said brake stop plate by means of said reset spring, said stopper being fixed to the penetration end of said generator shaft rear shaft, and said controller is fixed in said nacelle and is electrically connected to said temperature sensor, said stator coil and said electromagnetic block, respectively. said controller is fixed in said nacelle and electrically connected to said temperature sensor, said stator coil and said electromagnetic block respectively, when the wind speed is high and the heat generated by said generator is too high, said temperature sensor transmits a signal to said controller, said controller controls said stator coil to energize a magnetic field, at which time said rotor rotates to cut the magnetic field, generating an electromagnetic force to inhibit the rotation of said when said generator shaft rear shaft is in operation for a certain time, said controller transmits a signal to said electromagnetic block, said electromagnetic block generates a magnetic force, and said generator shaft rear shaft rotates at a lower speed, electromagnetic block generates a magnetic force, said brake stop plate moves in the direction of said electromagnetic block under the action of the magnetic force and fits against it, the two rub against each other and stop said generator shaft, when the temperature drops to a certain value, said temperature sensor when the temperature drops to a certain value, said temperature sensor transmits a signal to the controller, which controls that said stator coil and said electromagnetic block stop working and that said generator shaft rear shaft resumes rotation.
3. A wind turbine with wind resistance reduction blades according to claim 2, characterized in that it further comprises an electric opening and closing device, said electric opening and 904401 closing device comprising an electric-hydraulic push rod, an articulated joint, a folding device device comprising an electro-hydraulic push rod, an articulated joint, a folding device, said folding device having two movable pages fixed respectively to the penetrating end of said generator shaft rear shaft and to the inner wall of said wing blade, said electro-hydraulic push rod having articulated joints attached to both ends and electrically connected to said controller, both said articulated joints being fixed to the penetration end of said generator shaft rear shaft and to the corresponding inner wall of said the inner wall of said wing blade, said electro-hydraulic push rod being able to drive said wing blade to oscillate with said folding device when it is telescoped, when the wing blade stops working, said controller will control said electro-hydraulic push rod to contract so that said wing blade folds in the direction of said nacelle, and when said wing blade starts working, said controller controls said when said wing blade starts to work, said controller controls said electro-hydraulic push rod to elongate, causing said wing blade to return to its original position.
4. A wind turbine with wind resistance reduction blades according to claim 2, characterized in that said brake stop plate and said electromagnetic block are each provided with a friction surface on a corresponding working surface.
5. A wind turbine with wind resistance reduction blades according to claim 3, characterized in that the connection of said wing blade, near said generator shaft, is provided with a cutting angle and that the shape of the cutting angle coincides with the shape of the front outer wall of said nacelle said cut angle is provided with an avoidance opening corresponding to said electro-hydraulic push rod.
6. A wind turbine with wind resistance reduction blades according to claim 5, characterized in that said electro-hydraulic push rod stops working when said wing blade is fitted to said nacelle at the tangent angle, at which point the maximum angle at which the wing blade is The maximum angle at which the blade is closed.
7. A wind turbine with wind resistance reduction blades according to claim 3, characterized in that said wing blade is fixedly attached to said folding device movable sheet by means of a bolt.
8. A wind turbine with wind resistance reduction blades according to claim 2, characterized 504401 in that said electromagnetic block is provided with an insulation layer between the friction surface of said electromagnetic block and the surface of said electromagnetic block.
9. A wind turbine with wind resistance reduction blades according to claim 1, characterized in that said nacelle is provided with a heat sink above the installation position corresponding to said generator.
LU504401A 2022-08-26 2023-06-02 A wind turbine with wind resistance reduction blades LU504401B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211033405.6A CN115492721A (en) 2022-08-26 2022-08-26 Wind driven generator with wind resistance reducing blades

Publications (1)

Publication Number Publication Date
LU504401B1 true LU504401B1 (en) 2023-12-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
LU504401A LU504401B1 (en) 2022-08-26 2023-06-02 A wind turbine with wind resistance reduction blades

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Country Link
CN (1) CN115492721A (en)
LU (1) LU504401B1 (en)

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Effective date: 20231204