CN110345002A - A kind of Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip - Google Patents

A kind of Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip Download PDF

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Publication number
CN110345002A
CN110345002A CN201910474633.9A CN201910474633A CN110345002A CN 110345002 A CN110345002 A CN 110345002A CN 201910474633 A CN201910474633 A CN 201910474633A CN 110345002 A CN110345002 A CN 110345002A
Authority
CN
China
Prior art keywords
blade tip
blade
wind
shaft
body part
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201910474633.9A
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Chinese (zh)
Inventor
朱建勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenyang Aerospace University
Original Assignee
Shenyang Aerospace University
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 Shenyang Aerospace University filed Critical Shenyang Aerospace University
Priority to CN201910474633.9A priority Critical patent/CN110345002A/en
Publication of CN110345002A publication Critical patent/CN110345002A/en
Pending legal-status Critical Current

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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
    • 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
    • F03D7/026—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor for starting-up
    • 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
    • F03D7/0276—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling rotor speed, e.g. variable speed
    • 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
    • F03D7/028—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
    • 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)
  • Wind Motors (AREA)

Abstract

A kind of Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip, including blade body part and blade tip part, constitute complete pneumatic equipment bladess by blade body part and blade tip part；Blade tip part is connected by shaft with blade body part, shaft is parallel with the length direction of pneumatic equipment bladess, shaft lower end is fixedly connected with blade body part, and shaft upper end is connected by bearing with blade tip part, and blade tip part has revolution freedom degree relative to shaft；Torque spring is set in shaft, torque spring one end is fixedly connected with shaft, and the torque spring other end is fixedly connected with blade body part；The length of blade tip part is the 1%~50% of complete pneumatic equipment bladess length；Under quiet wind and low wind speed, the angle of blade tip and main part is 5 °~50 °；Under wind energy conversion system rated wind speed, the angle of blade tip and main part is 0 °~5 °；Under big wind speed or extreme fitful wind, the angle of blade tip and main part is -90 °~0 °.

Description

A kind of Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip
Technical field
The invention belongs to technical field of wind power generation, more particularly to a kind of trunnion axis wind of the adaptive rotational deformation of blade tip Power machine blade.
Background technique
Wind energy belongs to renewable and clean energy resource, actively helps to alleviate the environment got worse using wind energy and the energy is asked Topic, and small-sized horizontal-shaft wind turbine is a kind of wind power utilizing device, since small-sized horizontal-shaft wind turbine possesses higher wind energy Utilization efficiency is widely used in distributed generation system.
But for the small-sized horizontal-shaft wind turbine of lift-type, there are surpass under the difficult and big wind speed of self-starting The problems such as turn, and small-sized horizontal-shaft wind turbine is different from large-scale horizontal-shaft wind turbine, large-scale horizontal-shaft wind turbine can pass through electricity Motivation is started, and the power output of excess revolutions is limited by pitch-controlled system, but small-sized horizontal-shaft wind turbine is because of the letter of its structure Aerodynamic moment single, that starting can only be generated by itself blade, and the power output of big wind speed lower limit excess revolutions can only also rely on The stalling characteristics of blade itself.
In addition, small-sized horizontal-shaft wind turbine is generally difficult to start in the lower Urban Wind Field of mean wind speed, and works as and encounter When strong wind or extreme fitful wind, it is often also insecure for carrying out limitation power by the stalling characteristics of blade.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of horizontal-shaft wind turbine of adaptive rotational deformation of blade tip Blade, blade tip part can carry out adaptive rotational deformation according to wind conditions, help to improve wind-force at low wind speeds The self-starting performance of machine can effectively reduce power output under big wind speed or extreme fitful wind and reduce wind energy conversion system revolving speed, into And guarantee the operational safety of wind energy conversion system.
To achieve the goals above, the present invention adopts the following technical scheme: a kind of level of the adaptive rotational deformation of blade tip Axis pneumatic equipment bladess, including blade body part and blade tip part, are made of blade body part and blade tip part Complete pneumatic equipment bladess；The blade tip part is connected by shaft with blade body part, shaft and pneumatic equipment bladess Length direction it is parallel, shaft lower end is fixedly connected with blade body part, and shaft upper end passes through bearing and blade tip part It is connected, blade tip part has revolution freedom degree relative to shaft；Torque spring, torque spring are set in the shaft One end is fixedly connected with shaft, and the torque spring other end is fixedly connected with blade body part.
The length of the blade tip part is the 1%~50% of complete pneumatic equipment bladess length.
Under quiet wind and low wind speed, have between the chord length line of the blade tip part and the chord length line of blade body part There is 5 °~50 ° of angle.
Under wind energy conversion system rated wind speed, between the chord length line of the blade tip part and the chord length line of blade body part With 0 °~5 ° of angle.
Under big wind speed or extreme fitful wind, the chord length line of the chord length line of the blade tip part and blade body part it Between with -90 °~0 ° of angle.
Beneficial effects of the present invention:
The Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip of the invention, blade tip part can be according to wind speed Situation carries out adaptive rotational deformation, helps to improve the self-starting performance of wind energy conversion system at low wind speeds, in big wind speed or extremely Power output can be effectively reduced under fitful wind and reduces wind energy conversion system revolving speed, and then guarantees the operational safety of wind energy conversion system.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip of the invention；
Fig. 2 is the schematic diagram of blade of the invention under quiet wind and low wind speed；
Fig. 3 is the schematic diagram of blade of the invention under wind energy conversion system rated wind speed；
Fig. 4 is the schematic diagram of blade of the invention under big wind speed or extreme fitful wind；
In figure, 1-blade body part, 2-blade tip parts, 3-shafts, 4-bearings, 5-torque springs.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in figures 1-4, the Blades For Horizontal Axis Wind of the adaptive rotational deformation of a kind of blade tip, including blade body portion Divide 1 and blade tip part 2, complete pneumatic equipment bladess are constituted by blade body part 1 and blade tip part 2；The leaf Piece tip segment 2 is connected by shaft 3 with blade body part 1, and shaft 3 is parallel with the length direction of pneumatic equipment bladess, is turned 3 lower end of axis is fixedly connected with blade body part 1, and 3 upper end of shaft is connected by bearing 4 with blade tip part 2, blade and blade tip Divide 2 there is revolution freedom degree relative to shaft 3；Torque spring 5,5 one end of torque spring and shaft are set in the shaft 3 3 are fixedly connected with, and 5 other end of torque spring is fixedly connected with blade body part 1.
The length of the blade tip part 2 is the 1%~50% of complete pneumatic equipment bladess length.
Under quiet wind and low wind speed, between the chord length line of the blade tip part 2 and the chord length line of blade body part 1 With 5 °~50 ° of angle.
Under wind energy conversion system rated wind speed, the chord length line of the chord length line of the blade tip part 2 and blade body part 1 it Between with 0 °~5 ° of angle.
Under big wind speed or extreme fitful wind, the chord length line of the blade tip part 2 and the chord length line of blade body part 1 Between with -90 °~0 ° of angle.
The pneumatic efficiency of wind energy conversion system can be evaluated by power coefficient with the change curve of tip-speed ratio, In, the calculation formula of power coefficient is Cp=2PM/ρAV3, the calculation formula of tip-speed ratio is λ=wR/V, in formula, PM=2 π NM/60, CPFor power coefficient, PMFor wind wheel mechanical output, ρ is atmospheric density, and A is swept area of rotor, and V is incoming flow wind Speed, λ are tip-speed ratio, and w is that wind wheel rotates angle speed, and R is wind wheel radius of turn, and n is wind speed round, and M is rotor shaft torque.
After horizontal-shaft wind turbine is mounted with blade of the invention, under quiet wind and low wind speed, blade tip part 2 is close Pressure suffered by up-front windward side is smaller, and torque spring 5 is insufficient to allow to generate torsional deformation, in this case, blade and blade There can be 5 °~50 ° of angle between the chord length line of nose part 2 and the chord length line of blade body part 1, be equivalent to and increase leaf The established angle of piece tip segment 2, to facilitate the self-starting of wind energy conversion system.
When wind speed reaches wind energy conversion system rated wind speed, the pressure suffered by the up-front windward side of blade tip part 2 Also it will increase, and then torque spring 5 can be made to generate torsional deformation, in this case, the chord length line and blade of blade tip part 2 Also 0 °~5 ° can be contracted between the chord length line of main part 1, and when angle between the two narrows down to 0 °, then blade tip Part 2 and blade body part 1 form complete pneumatic equipment bladess, to ensure that wind energy conversion system wind energy utilization effect with higher Rate.
When encountering big wind speed or extreme fitful wind, the rated wind speed for carrying out flow velocity and having been above wind energy conversion system at this time leads to leaf The pressure suffered by the up-front windward side of piece tip segment 2 can also synchronize increase, and then generate torque spring 5 significantly Torsional deformation can then be reached between the chord length line of blade tip part 2 and the chord length line of blade body part 1 in this case To within the scope of -90 °~0 °, blade tip part 2 can directly result in the power output and revolving speed of wind energy conversion system under this rotational angle It reduces, to ensure that the operational safety of wind energy conversion system.
Wind energy conversion system is from the operation phase is transformed into during startup stage, the rotational deformation process of blade tip part 2 Without artificially interfering, adaptive deformation is fully achieved.
The scope of patent protection that scheme in embodiment is not intended to limit the invention, it is all without departing from carried out by the present invention etc. Effect implements or change, is both contained in the scope of the patents of this case.

Claims (5)

1. a kind of Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip, it is characterised in that: including blade body part and Blade tip part constitutes complete pneumatic equipment bladess by blade body part and blade tip part；The blade and blade tip Divide and be connected by shaft with blade body part, shaft is parallel with the length direction of pneumatic equipment bladess, shaft lower end and blade Main part is fixedly connected with, and shaft upper end is connected by bearing with blade tip part, and blade tip part has relative to shaft Turn round freedom degree；Torque spring is set in the shaft, torque spring one end is fixedly connected with shaft, the torque spring other end It is fixedly connected with blade body part.
2. a kind of Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip according to claim 1, it is characterised in that: The length of the blade tip part is the 1%~50% of complete pneumatic equipment bladess length.
3. a kind of Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip according to claim 1, it is characterised in that: Under quiet wind and low wind speed, between the chord length line of the blade tip part and the chord length line of blade body part have 5 °~ 50 ° of angle.
4. a kind of Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip according to claim 1, it is characterised in that: Under wind energy conversion system rated wind speed, between the chord length line of the blade tip part and the chord length line of blade body part have 0 °~ 5 ° of angle.
5. a kind of Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip according to claim 1, it is characterised in that: Under big wind speed or extreme fitful wind, have between the chord length line of the blade tip part and the chord length line of blade body part- 90 °~0 ° of angle.
CN201910474633.9A 2019-06-03 2019-06-03 A kind of Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip Pending CN110345002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910474633.9A CN110345002A (en) 2019-06-03 2019-06-03 A kind of Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910474633.9A CN110345002A (en) 2019-06-03 2019-06-03 A kind of Blades For Horizontal Axis Wind of the adaptive rotational deformation of blade tip

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CN110345002A true CN110345002A (en) 2019-10-18

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4374631A (en) * 1981-05-21 1983-02-22 Fayette Manufacturing Corporation Windmill speed limiting system utilizing hysteresis
JP2005188429A (en) * 2003-12-26 2005-07-14 Daiwa House Ind Co Ltd Rotating speed control mechanism of horizontal shaft type windmill for power generation
CN101372938A (en) * 2007-08-22 2009-02-25 东莞中德风电能源有限公司 Vane
US20120282094A1 (en) * 2009-09-12 2012-11-08 Gay Paul L Wind Turbine Blade Tip Brake Apparatus and Method
CN104234929A (en) * 2014-07-24 2014-12-24 南京航空航天大学 Device for controlling loading and deformation of wind turbine blade
CN204476670U (en) * 2014-12-29 2015-07-15 上海理工大学 A kind of blade of wind-driven generator and wind-driven generator
CN108953052A (en) * 2018-06-27 2018-12-07 明阳智慧能源集团股份公司 A method of it reducing wind power generating set and shuts down extreme loads under operating condition

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4374631A (en) * 1981-05-21 1983-02-22 Fayette Manufacturing Corporation Windmill speed limiting system utilizing hysteresis
JP2005188429A (en) * 2003-12-26 2005-07-14 Daiwa House Ind Co Ltd Rotating speed control mechanism of horizontal shaft type windmill for power generation
CN101372938A (en) * 2007-08-22 2009-02-25 东莞中德风电能源有限公司 Vane
US20120282094A1 (en) * 2009-09-12 2012-11-08 Gay Paul L Wind Turbine Blade Tip Brake Apparatus and Method
CN104234929A (en) * 2014-07-24 2014-12-24 南京航空航天大学 Device for controlling loading and deformation of wind turbine blade
CN204476670U (en) * 2014-12-29 2015-07-15 上海理工大学 A kind of blade of wind-driven generator and wind-driven generator
CN108953052A (en) * 2018-06-27 2018-12-07 明阳智慧能源集团股份公司 A method of it reducing wind power generating set and shuts down extreme loads under operating condition

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Application publication date: 20191018