CN112483308B - Fan blade with movable blade sectors - Google Patents
Fan blade with movable blade sectors Download PDFInfo
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- CN112483308B CN112483308B CN202011406942.1A CN202011406942A CN112483308B CN 112483308 B CN112483308 B CN 112483308B CN 202011406942 A CN202011406942 A CN 202011406942A CN 112483308 B CN112483308 B CN 112483308B
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- push rod
- hydraulic push
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- 239000007787 solid Substances 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 80
- 239000010959 steel Substances 0.000 claims description 80
- 230000008602 contraction Effects 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 description 4
- 238000010248 power generation Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
- 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
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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
- 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
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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
- 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
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- 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
- F05B2240/31—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape
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- 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
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/32—Wind speeds
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- 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
- F05B2270/604—Control system actuates through hydraulic actuators
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- 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
The invention discloses a fan blade with a movable blade sector, which comprises an electric hydraulic push rod, a solid blade top, a solid blade root, a control system, a wind speed measuring instrument, a movable blade sector and a hollow main body blade. The wind speed is monitored in real time through the wind speed measuring instrument, and the control system controls the electric hydraulic push rod to drive the movable blade sector to stretch and contract so as to change the area of the fan blade. The invention can greatly increase the flexibility of the wind driven generator by changing the area of the fan blade, so that the generating capacity of the wind driven generator can be adjusted according to the ambient wind speed instead of completely depending on the change of the wind speed, the generating power of the wind driven generator is stable, the wind power is convenient to be networked, and the utilization rate of the wind power is enhanced.
Description
Technical Field
The invention relates to the technical field of power generation, in particular to a fan blade with a movable blade sector, and belongs to the field of wind power generation.
Background
In the early 70 s, the problem of energy shortage occurs due to the oil crisis, people recognize the instability and the limitation of the conventional mineral energy supply, and the search for clean renewable energy sources becomes an important subject of the modern world. Wind energy has attracted attention again as a renewable, pollution-free natural energy source. In recent years, the development of wind power in emerging markets is rapid. Under the background of national policy support and energy supply tension, the wind power industry in China, particularly the manufacturing industry of wind power equipment, also rises rapidly, and becomes the most active region of wind power in the world.
In the field of wind power generation, the intermittency and instability of wind power can impact a power grid after being merged into the power grid, so that the quality of electric energy is deteriorated. In order to make the wind power reach the network access condition and make the network access power as stable as possible, the power grid operator needs to add additional peak shaving equipment, which can increase the investment cost of enterprises. The larger the area of the fan blade is, the higher the solidity of the wind wheel is, the smaller the tip speed ratio of the wind wheel is, and the lower the total efficiency of the fan is. If the area of the fan blade can be directly changed, the area of the blade is increased when the wind speed is increased, the total efficiency of the fan is reduced, the area of the blade is reduced when the wind speed is reduced, the total efficiency of the fan is increased, and the stability of the output power of the wind driven generator can be ensured under the condition of changing the wind speed. A fan blade with a movable blade sector therefore becomes one of the desiderata in the art.
Disclosure of Invention
The invention mainly solves the technical problem of providing a fan blade with a movable blade sector, which can adjust the area of the fan blade and change the solidity of a wind wheel, thereby properly changing the size of the area of the blade according to the change of the wind speed. The stability of fan power is improved.
In order to solve the technical problem, the invention adopts a technical scheme that:
a fan blade with a movable blade sector, characterized in that: the device comprises an electric hydraulic push rod a1, an electric hydraulic push rod b2, a blade solid top 3, an electric hydraulic push rod c4, an electric hydraulic push rod d5, a control system 6, an air speed measuring instrument 7, a movable blade sector a8, a movable blade sector b9, a movable blade sector c10, a movable blade sector d11, a hollow main body blade 12, a blade solid root 13, an I-shaped steel column 14, a circular steel column a15, a circular steel column b16, a circular steel column c17, a circular steel column d18, a hollow main body blade closing frame a19, a hollow main body blade closing frame b20, a hollow main body blade closing frame c21, a hollow main body blade non-closing frame a22 and a hollow main body blade non-closing frame b 23; the hollow body blade closure frame a19 includes: a hollow body blade closure frame part a191, a hollow body blade closure frame part b192, a hollow body blade closure frame part c 193; the hollow body blade closure frame b20 includes: a hollow body blade closing frame part d201, a hollow body blade closing frame part e 202; the hollow body blade closure frame c21 includes: a hollow body blade closing frame part f211, a hollow body blade closing frame part g212, a hollow body blade closing frame part h 213; the hollow body blade non-closing frame a22 includes: a hollow body blade non-closing frame part a221, a hollow body blade non-closing frame part b222, a hollow body blade non-closing frame part c223, a hollow body blade non-closing frame part d224, a hollow body blade non-closing frame part e225, a hollow body blade non-closing frame part f 226; the hollow body blade non-closing frame b23 includes: a hollow body blade non-closing frame part g231, a hollow body blade non-closing frame part h232, a hollow body blade non-closing frame part i233, a hollow body blade non-closing frame part j234, a hollow body blade non-closing frame part k235, and a hollow body blade non-closing frame part l 236.
The movable blade sector a8 is positioned on the front edge of the fan blade, the length of the movable blade sector a8 is one third of the length of the front edge of the fan blade from the ninth position of the root of the front edge blade, the width of the movable blade sector a8 is one fourth of the width of the root of the solid root 13 of the fan blade, two ends of a circular steel column a15 are respectively welded with two side blade surfaces of the movable blade sector a8, and the central part of the circular steel column a15 is welded with an electric hydraulic push rod a 1; the movable blade sector b9 is located at the rear edge of the fan blade, the length of the movable blade sector b9 is one third of the length of the rear edge of the fan blade from one ninth of the root of the rear edge blade, the width of the movable blade sector b9 is one fourth of the width of the root of the solid root 13 of the fan blade, two side blade surfaces of the movable blade sector b9 are respectively welded at two ends of a circular steel column b16, and the central part of the circular steel column b16 is welded with an electric hydraulic push rod b 2; the movable blade sector c10 is located at the front edge of the fan blade, the length of the movable blade sector c10 is one third of the length of the front edge of the fan blade from the root of the front edge at the ninth position, the width of the movable blade sector c10 is one fourth of the width of the solid root 13 of the fan blade, two ends of a circular steel column c17 are respectively welded with two side blade surfaces of the movable blade sector c10, and the central part of the circular steel column c17 is welded with an electric hydraulic push rod c 4; the movable blade sector d11 is located the fan blade trailing edge, from the trailing edge blade root five ninth department, and length is the third of blade trailing edge length, and the width is the fourth of the solid root 13 blade root width of blade, and the both sides blade surface of movable blade sector d11 is welded respectively at circular steel column d18 both ends, and circular steel column d18 central point is welded with electronic hydraulic push rod d 5.
The movable vane sector a8, movable vane sector b9, movable vane sector c10, and movable vane sector d11 are not in contact with the hollow body vane 12; the movable vane sector a8 and the movable vane sector c10 have an interval, and the length of the interval is one ninth of the length of the front edge vane; the movable vane sector b9 and the movable vane sector d11 also have a spacing with a length which is one ninth of the length of the rear edge vane; the leading and trailing edge vanes are of the same length, and the separation between the movable vane sector a8 and the movable vane sector c10 is of the same length as the separation between the movable vane sector b9 and the movable vane sector d 11.
The electric hydraulic push rod a1, the electric hydraulic push rod b2, the electric hydraulic push rod c4 and the electric hydraulic push rod d5 have the same structure and are divided into a fixed end and a movable push rod, the fixed end refers to an electric motor, an oil pump and a push rod control device, and the movable push rod refers to a push rod of the electric hydraulic push rod; the electric hydraulic push rod a1 is fixed in the hollow main body blade 12 at one fourth of the root of the main body blade, the movable push rod of the electric hydraulic push rod a1 is welded with the circular steel column a15, and the fixed end of the electric hydraulic push rod a1 is welded and fixed with the I-shaped steel column 14; the electric hydraulic push rod b2 is fixed in the hollow main body blade 12 at one fourth of the root of the main body blade, the movable push rod of the electric hydraulic push rod b2 is welded with the circular steel column b16, the fixed end of the electric hydraulic push rod b2 is welded and fixed with the I-shaped steel column 14, and the electric hydraulic push rod a1 and the electric hydraulic push rod b2 are positioned on the same straight line; the electric hydraulic push rod c4 is fixed in the hollow main body blade 12 at three quarters of the root of the main body blade, the movable push rod of the electric hydraulic push rod c4 is welded with the circular steel column c17, and the fixed end of the electric hydraulic push rod c4 is welded and fixed with the I-shaped steel column 14; the electric hydraulic push rod d5 is fixed in the hollow main body blade 12 from three quarters of the main body blade root, the movable push rod of the electric hydraulic push rod d5 is welded with the circular steel column d18, the fixed end of the electric hydraulic push rod d5 is welded and fixed with the I-shaped steel column 14, and the electric hydraulic push rod c4 and the electric hydraulic push rod d5 are located on the same straight line.
The wind speed measuring instrument 7 is connected with the control system 6, a wind speed signal measured by the wind speed measuring instrument 7 is input into the control system 6, and the control system 6 controls the electric hydraulic push rod a1, the electric hydraulic push rod b2, the electric hydraulic push rod c4 and the electric hydraulic push rod d5 according to the input signal.
The control system 6 is respectively and directly connected with the electric hydraulic push rod a1, the electric hydraulic push rod b2, the electric hydraulic push rod c4 and the electric hydraulic push rod d5, and can respectively send out instructions to adjust the effective windward area of the fan blade in 2 stages; when the wind speed is more than 20 m/s, the fan blade works normally; when the wind speed is reduced to 20 m/s, if the wind speed is continuously reduced but is more than 15 m/s, in order to maintain the power of the fan unchanged, controlling the movable blade sector d11 and the movable blade sector c10 to contract along with the reduction of the wind speed, reducing the blade area, reducing the solidity of the wind wheel, increasing the tip speed ratio of the wind wheel, improving the overall efficiency of the fan, and performing 1-stage contraction adjustment, wherein when the wind speed reaches 15 m/s, the movable blade sector d11 and the movable blade sector c10 are completely contracted, and the 1-stage contraction adjustment is finished; when the wind speed is less than 15 m/s, if the wind speed is continuously reduced but is more than 10 m/s, the movable blade sector d11 and the movable blade sector c10 are kept unchanged at the contraction positions, the movable blade sector b9 and the movable blade sector a8 are continuously controlled to contract along with the reduction of the wind speed to maintain the fan power, 2-stage contraction adjustment is carried out, when the wind speed reaches 10 m/s, the movable blade sector b9 and the movable blade sector a8 are completely contracted, and the 2-stage contraction adjustment is finished; when the wind speed is less than 10 m/s, the contraction states of the movable blade sector a8, the movable blade sector b9, the movable blade sector c10 and the movable blade sector d11 are maintained, and the fan works normally; the 1-level and 2-level contraction adjustment increases the adaptability of the wind driven generator to the change of the ambient wind speed, and the power stability of the fan can be maintained when the wind speed changes; when the wind speed is increased to 10 m/s, if the wind speed is continuously increased but is less than 15 m/s, the movable blade sector a8 and the movable blade sector b9 are controlled to extend along with the increase of the wind speed while the contraction state of the movable blade sector c10 and the movable blade sector d11 is maintained, so as to maintain the fan power until the wind speed is increased to 15 m/s, and the movable blade sector a8 and the movable blade sector b9 return to the original positions; when the wind speed is increased to 15 m/s, if the wind speed is continuously increased but is less than 20 m/s, the movable blade sector a8 and the movable blade sector b9 are kept to be recovered, at the same time, the movable blade sector c10 and the movable blade sector d11 are controlled to extend along with the increase of the wind speed to maintain the fan power, and when the wind speed is increased to 20 m/s, the movable blade sector c10 and the movable blade sector d11 are restored to the original positions.
One end of the I-shaped steel column 14 is welded with the solid root 13 of the blade, and the other end of the I-shaped steel column is welded with the solid top 3 of the blade; meanwhile, the i-shaped steel column 14 is a frame member penetrating the hollow body blade 12, and all of the hollow body blade closing frame a19, the hollow body blade closing frame b20, the hollow body blade closing frame c21, the hollow body blade non-closing frame a22, and the hollow body blade non-closing frame b23 are fixed together by welding with the i-shaped steel column 14.
All the parts of the hollow body blade closing frame a19, the hollow body blade closing frame b20, the hollow body blade closing frame c21, the hollow body blade non-closing frame a22 and the hollow body blade non-closing frame b23 are welded on the i-shaped steel column 14 to form a hollow body blade frame, and the surface of the frame is covered with an iron sheet to form the hollow body blade 12.
The invention has the beneficial effects that:
the invention relates to a fan blade with a movable blade sector, which is a conventional fan blade, wherein the shape and the area of the blade are determined during casting, and the area of the blade cannot be adjusted as required when the wind speed is changed, so that the power of the fan is influenced by the ambient wind speed, the fluctuation is large, and the applicable wind speed range is 3-20 m/s generally; compared with the defect that the area of the blade cannot be changed according to the real-time wind speed of the conventional fan blade, the fan blade has the advantages that 4 telescopic blade sectors are added, and the area of the fan blade is effectively changed through the telescopic blade sectors; the real-time wind speed is measured by the wind speed measuring instrument 7 and input into the control system 6, and when the wind speed is reduced, the movable blade sector a8, the movable blade sector b9, the movable blade sector c10 and the movable blade sector d11 are gradually contracted to maintain the fan power; when the wind speed increases, but movable blade sector a8, but movable blade sector b9, but movable blade sector c10, but movable blade sector d11 stretches out gradually until the reconversion, stretch out and draw back through adjusting specific blade sector, thereby change fan blade area, improve fan power stability, this kind of structure greatly increased aerogenerator's flexibility, let aerogenerator's generated energy can be adjusted according to the ambient wind speed, promote aerogenerator's generated power stability, make things convenient for wind-powered electricity generation network entry, reinforcing wind-powered electricity generation utilization ratio.
Drawings
FIG. 1 is a two-dimensional view of the inside of a fan blade with a movable blade segment of the present invention when the blade segment is not retracted;
FIG. 2 is a two-dimensional view of the surface of a fan blade with a movable blade section of the present invention when the blade section is not retracted;
FIG. 3 is a two-dimensional view of the interior of a 1-stage retraction adjustment of a fan blade with a movable blade sector according to the present invention;
FIG. 4 is a two-dimensional view of the surface of a 1-stage shrink adjustment fan blade with a movable blade sector of the present invention;
FIG. 5 is a two-dimensional view of the interior of a blower blade with movable blade sectors during 2-stage retraction adjustment of the present invention;
FIG. 6 is a two-dimensional view of the surface of a blower blade with movable blade sectors for 2-stage retraction adjustment of the present invention;
FIG. 7 is a cross-sectional view of a movable vane segment a8 and a movable vane segment b9 of a fan vane with a movable vane segment of the present invention shown in an un-retracted configuration;
FIG. 8 is a cross-sectional view of a fully retracted movable vane segment a8 and a movable vane segment b9 of a fan blade having a movable vane segment in accordance with the present invention;
FIG. 9 is an assembled view of a leading movable vane sector and an electro-hydraulic ram of a fan blade with a movable vane sector in accordance with the present invention;
FIG. 10 is an assembled view of a trailing movable vane segment and an electro-hydraulic ram of a fan blade with a movable vane segment in accordance with the present invention.
Fig. 11 is a hollow body blade closure frame part a191 of a fan blade with a movable blade sector according to the invention.
Fig. 12 shows a hollow body blade non-closing frame part a221 of a fan blade with a movable blade sector according to the invention.
FIG. 13 is a hollow body blade frame of a fan blade with movable blade sectors of the present invention.
Detailed Description
The invention is further described in detail below with reference to the drawings and the detailed description so that the advantages and features of the invention can be more easily understood by those skilled in the art, and the scope of the invention is more clearly and clearly defined.
The invention relates to a fan blade with a movable blade sector, which comprises an electric hydraulic push rod a1, an electric hydraulic push rod b2, a blade solid top 3, an electric hydraulic push rod c4, an electric hydraulic push rod d5, a control system 6, a wind speed measuring instrument 7, a movable blade sector a8, a movable blade sector b9, a movable blade sector c10, a movable blade sector d11, a hollow main body blade 12, a blade solid root 13, an I-shaped steel column 14, a circular steel column a15, a circular steel column b16, a circular steel column c17, a circular steel column d18, a hollow main body blade closed frame a19, a hollow main body blade closed frame b20, a hollow main body blade closed frame c21, a hollow main body blade non-closed frame a22 and a hollow main body blade non-closed frame b 23; the hollow body blade closure frame a19 includes: a hollow body blade closure frame part a191, a hollow body blade closure frame part b192, a hollow body blade closure frame part c 193; the hollow body blade closing frame b20 includes: a hollow body blade closing frame part d201, a hollow body blade closing frame part e 202; the hollow body blade closure frame c21 includes: a hollow body blade closing frame part f211, a hollow body blade closing frame part g212, a hollow body blade closing frame part h 213; the hollow body blade non-closing frame a22 includes: a hollow body blade non-closing frame part a221, a hollow body blade non-closing frame part b222, a hollow body blade non-closing frame part c223, a hollow body blade non-closing frame part d224, a hollow body blade non-closing frame part e225, a hollow body blade non-closing frame part f 226; the hollow body blade non-closing frame b23 includes: a hollow body blade non-closing frame part g231, a hollow body blade non-closing frame part h232, a hollow body blade non-closing frame part i233, a hollow body blade non-closing frame part j234, a hollow body blade non-closing frame part k235, and a hollow body blade non-closing frame part l 236.
As a preferred embodiment of the present invention, as shown in FIG. 1, the movable blade sector a8 is located at the leading edge of the fan blade, starting at the ninth position of the blade root at the leading edge, and has a length of one third of the length of the leading edge and a width of one fourth of the width of the root of the solid root 13 of the blade; the movable blade sector b9 is located at the trailing edge of the fan blade, and has a length of one third of the trailing edge from one ninth of the trailing edge blade root and a width of one fourth of the root width of the solid root 13 of the blade; the movable blade sector c10 is located at the front edge of the fan blade, and is one third of the length of the front edge of the blade and one fourth of the width of the solid root 13 of the blade at the position of five ninth of the root of the blade from the front edge; the movable vane sector d11 is located at the trailing edge of the fan vane at five-ninth of the trailing edge vane root, and has a length of one third of the trailing edge length and a width of one fourth of the root width of the solid root 13 of the vane.
As shown in fig. 1, the electro-hydraulic push rod a1, the electro-hydraulic push rod b2, the electro-hydraulic push rod c4 and the electro-hydraulic push rod d5 have the same structure, and are divided into a fixed end and a movable push rod, wherein the fixed end refers to the motor, the oil pump and the push rod control device, and the movable push rod refers to the push rod of the electro-hydraulic push rod; the electric hydraulic push rod a1 is fixed in the hollow main body blade 12 at one fourth of the root of the main body blade, the movable push rod of the electric hydraulic push rod a1 is welded with the circular steel column a15, and the fixed end of the electric hydraulic push rod a1 is welded and fixed with the I-shaped steel column 14; the electric hydraulic push rod b2 is fixed in the hollow main body blade 12 at one fourth of the root of the main body blade, the movable push rod of the electric hydraulic push rod b2 is welded with the circular steel column b16, the fixed end of the electric hydraulic push rod b2 is welded and fixed with the I-shaped steel column 14, and the electric hydraulic push rod a1 and the electric hydraulic push rod b2 are positioned on the same straight line; the electric hydraulic push rod c4 is fixed in the hollow main body blade 12 at three quarters of the root of the main body blade, the movable push rod of the electric hydraulic push rod c4 is welded with the circular steel column c17, and the fixed end of the electric hydraulic push rod c4 is welded and fixed with the I-shaped steel column 14; the electric hydraulic push rod d5 is fixed in the hollow main body blade 12 at three quarters of the root of the main body blade, the movable push rod of the electric hydraulic push rod d5 is welded with the circular steel column d18, the fixed end of the electric hydraulic push rod d5 is welded and fixed with the I-shaped steel column 14, and the electric hydraulic push rod c4 and the electric hydraulic push rod d5 are positioned on the same straight line; one end of an I-shaped steel column 14 is welded with the solid root 13 of the blade, and the other end of the I-shaped steel column is welded with the solid top 3 of the blade; the wind speed measuring instrument 7 is connected with the control system 6, measured wind speed signals are input into the control system 6, and the control system 6 controls the electric hydraulic push rod a1, the electric hydraulic push rod b2, the electric hydraulic push rod c4 and the electric hydraulic push rod d5 according to the input signals.
As shown in fig. 1 and 2, the movable vane sector a8 and the movable vane sector c10 have a spacing length of one ninth of the length of the front edge vane, and the movable vane sector b9 and the movable vane sector d11 also have a spacing length of one ninth of the length of the rear edge vane; the leading and trailing edge vanes are of the same length, and the separation between the movable vane sector a8 and the movable vane sector c10 is of the same length as the separation between the movable vane sector b9 and the movable vane sector d 11.
The control system 6 is respectively connected with the electric hydraulic push rod a1, the electric hydraulic push rod b2, the electric hydraulic push rod c4 and the electric hydraulic push rod d5, and can respectively send out instructions to adjust the effective windward area of the fan blade in 2 stages; when the wind speed is more than 20 m/s, the fan blade works normally; when the wind speed is reduced to 20 m/s, if the wind speed is continuously reduced but is more than 15 m/s, in order to maintain the power of the fan unchanged, controlling the movable blade sector d11 and the movable blade sector c10 to contract along with the reduction of the wind speed, reducing the blade area, reducing the solidity of the wind wheel, increasing the tip speed ratio of the wind wheel, improving the overall efficiency of the fan, and performing 1-stage contraction adjustment, wherein when the wind speed reaches 15 m/s, the movable blade sector d11 and the movable blade sector c10 are completely contracted, and the 1-stage contraction adjustment is finished; when the wind speed is less than 15 m/s, if the wind speed is continuously reduced but is greater than 10 m/s, while maintaining the retracted positions of the movable blade sector d11 and the movable blade sector c10, continuously controlling the retraction of the movable blade sector b9 and the movable blade sector a8 with the reduction of the wind speed to maintain the fan power, so as to perform 2-stage retraction adjustment, when the wind speed reaches 10 m/s, the movable blade sector b9 and the movable blade sector a8 are completely retracted, and the 2-stage retraction adjustment is finished; when the wind speed is less than 10 m/s, the contraction states of the movable blade sector a8, the movable blade sector b9, the movable blade sector c10 and the movable blade sector d11 are maintained, and the fan normally works; the 1-level and 2-level contraction adjustment increases the adaptability of the wind driven generator to the change of the ambient wind speed, and the power stability of the fan can be maintained when the wind speed changes; when the wind speed is increased to 10 m/s, if the wind speed is continuously increased but is less than 15 m/s, the movable blade sector a8 and the movable blade sector b9 are controlled to extend along with the increase of the wind speed while the contraction state of the movable blade sector c10 and the movable blade sector d11 is maintained, so as to maintain the fan power until the wind speed is increased to 15 m/s, and the movable blade sector a8 and the movable blade sector b9 return to the original positions; when the wind speed is increased to 15 m/s, if the wind speed is continuously increased but is less than 20 m/s, the movable blade sector a8 and the movable blade sector b9 are kept to be recovered, at the same time, the movable blade sector c10 and the movable blade sector d11 are controlled to extend along with the increase of the wind speed to maintain the fan power, and when the wind speed is increased to 20 m/s, the movable blade sector c10 and the movable blade sector d11 are restored to the original positions.
As shown in fig. 3 and 4, when the wind speed reaches 20 m/s and the control system 6 issues a control command, the electric hydraulic push rod c4 and the electric hydraulic push rod d5 are controlled to perform retraction movement, so as to drive the movable blade sector c10 and the movable blade sector d11 to retract, thereby reducing the effective windward area of the fan blade, and when the wind speed reaches 15 m/s, the fan blade is fully retracted to perform level 1 retraction adjustment.
As shown in fig. 5 and 6, when the wind speed reaches 15 m/s and the control system 6 issues a control command, the electric hydraulic push rod c4 and the electric hydraulic push rod d5 are not actuated, the movable vane sector c10 and the movable vane sector d11 are kept in a contracted state, the electric hydraulic push rod a1 and the electric hydraulic push rod b2 are controlled to perform contraction movement, the movable vane sector a8 and the movable vane sector b9 are driven to contract, and when the wind speed reaches 10 m/s, the movable vane sector b9 is completely contracted, and the 2-stage contraction adjustment is performed.
As shown in fig. 7, the movable vane sector a8, the movable vane sector b9, the movable vane sector c10, and the movable vane sector d11 are not in contact with the hollow body vane 12.
As shown in fig. 8, during the contraction process, the movable blade sector a8, the movable blade sector b9 contract into the interior of the hollow body blade 12; movable vane sector c10 is similar in construction to movable vane sector d11 in contraction.
As shown in fig. 9, two ends of a circular steel column a15 are respectively welded to two side blade surfaces of a movable blade sector a8, and the center of the circular steel column a15 is welded to an electric hydraulic push rod a 1; the structure of the movable blade sector c10 is similar to that of the movable blade sector a8, two ends of a circular steel column c17 are respectively welded to two side blade surfaces of the movable blade sector c10, and the center of the circular steel column c17 is welded to an electric hydraulic push rod c 4.
As shown in fig. 10, two ends of a circular steel column b16 are respectively welded to two side faces of a movable blade sector b9, and the central part of the circular steel column b16 is welded to an electric hydraulic push rod b 2; the movable vane sector d11 has a structure similar to that of the movable vane sector b9, two ends of a circular steel column d18 are respectively welded to two side vane surfaces of the movable vane sector d11, and the center of the circular steel column d18 is welded to an electric hydraulic push rod d 5.
As shown in fig. 11, the hollow body blade closing frame component a191 is an integral closing frame, two steel column supports are arranged in the middle, and the two steel column supports are welded with the i-shaped steel frame 14; the other parts of the hollow body blade closure frame a19 and the parts constituting the hollow body blade closure frame b20, the hollow body blade closure frame c21 are similar in construction to the hollow body blade closure frame part a 191.
As shown in fig. 12, the non-closed frame part a221 of the hollow main body blade is a non-closed frame, and two steel column supports are arranged in the middle and are welded with the i-shaped steel frame 14; the other parts of the hollow body blade non-closing frame a22 and the parts constituting the hollow body blade non-closing frame b23 are similar in structure to the hollow body blade non-closing frame part a 221.
As shown in fig. 13, all the components constituting the hollow body blade closing frame a19, the hollow body blade closing frame b20, and the hollow body blade closing frame c21 and all the components constituting the hollow body blade non-closing frame a22 and the hollow body blade non-closing frame b23 are welded in this order to the i-shaped steel column 14 in the illustrated order, and the entire hollow blade is formed into a hollow blade entire frame, and then the frame body constituted by the hollow body blade closing frame a19, the hollow body blade closing frame b20, the hollow body blade closing frame c21, the hollow body blade non-closing frame a22, and the hollow body blade non-closing frame b23 is covered with an iron sheet to form the hollow body blade 12.
In summary, the invention is a fan blade with a movable blade sector, the shape and area of a conventional fan blade are determined during casting, the size of the area of the blade cannot be adjusted as required when the wind speed changes, and the fan power is unstable; compared with the defect that the area of the blade cannot be changed according to the real-time wind speed of the conventional fan blade, the invention adds 4 telescopic blade sectors, and the area of the blade is effectively changed through the expansion and contraction of the blade sectors; the real-time wind speed is measured by the wind speed measuring instrument 7 and input into the control system 6, the movable blade sector a8, the movable blade sector b9, the movable blade sector c10 and the movable blade sector d11 can be respectively adjusted according to specific conditions, and when the wind speed is reduced, the movable blade sector a8, the movable blade sector b9, the movable blade sector c10 and the movable blade sector d11 gradually contract; when the wind speed is increased, the movable blade sector a8, the movable blade sector b9, the movable blade sector c10 and the movable blade sector d11 gradually extend out and restore to the original state, so that the area of the fan blade is changed, the solidity and tip speed ratio of the wind wheel are changed, and the full power of the fan is changed.
Claims (4)
1. A fan blade with a movable blade sector, characterized in that: comprises an electric hydraulic push rod a (1), an electric hydraulic push rod b (2), a blade solid top (3), an electric hydraulic push rod c (4), an electric hydraulic push rod d (5), a control system (6), a wind speed measuring instrument (7), a movable blade sector a (8), a movable blade sector b (9), a movable blade sector c (10), a movable blade sector d (11) and a hollow main body blade (12), the blade comprises a blade solid root (13), an I-shaped steel column (14), a circular steel column a (15), a circular steel column b (16), a circular steel column c (17), a circular steel column d (18), a hollow main body blade closed frame a (19), a hollow main body blade closed frame b (20), a hollow main body blade closed frame c (21), a hollow main body blade non-closed frame a (22) and a hollow main body blade non-closed frame b (23); two ends of a circular steel column a (15) are respectively welded with two side blade surfaces of a movable blade sector a (8), and the central part of the circular steel column a (15) is welded with an electric hydraulic push rod a (1); two ends of a circular steel column b (16) are respectively welded with two side blade surfaces of a movable blade sector b (9), and the central part of the circular steel column b (16) is welded with an electric hydraulic push rod b (2); two ends of a circular steel column c (17) are respectively welded with two side blade surfaces of a movable blade sector c (10), and the central part of the circular steel column c (17) is welded with an electric hydraulic push rod c (4); two ends of a circular steel column d (18) are respectively welded with two side blade surfaces of a movable blade sector d (11), and the central part of the circular steel column d (18) is welded with an electric hydraulic push rod d (5); the movable vane sector a (8), the movable vane sector b (9), the movable vane sector c (10) and the movable vane sector d (11) are not in contact with the hollow main body vane (12) in the telescopic process; one end of the I-shaped steel column (14) is welded with the solid root (13) of the blade, and the other end of the I-shaped steel column is welded with the solid top (3) of the blade; meanwhile, the I-shaped steel column (14) is a frame component penetrating through the hollow main body blade (12); the hollow body blade closing frame a (19) comprises: a hollow body blade closure frame part a (191), a hollow body blade closure frame part b (192), a hollow body blade closure frame part c (193); the hollow body blade closing frame b (20) includes: a hollow body blade closing frame part d (201), a hollow body blade closing frame part e (202); the hollow body blade closing frame c (21) includes: a hollow body blade closing frame part f (211), a hollow body blade closing frame part g (212), a hollow body blade closing frame part h (213); the hollow body blade non-closing frame a (22) includes: a hollow body blade non-closing frame part a (221), a hollow body blade non-closing frame part b (222), a hollow body blade non-closing frame part c (223), a hollow body blade non-closing frame part d (224), a hollow body blade non-closing frame part e (225), a hollow body blade non-closing frame part f (226); the hollow body blade non-closing frame b (23) includes: a hollow body blade non-closing frame part g (231), a hollow body blade non-closing frame part h (232), a hollow body blade non-closing frame part i (233), a hollow body blade non-closing frame part j (234), a hollow body blade non-closing frame part k (235), a hollow body blade non-closing frame part l (236); all parts of a hollow main body blade closing frame a (19), a hollow main body blade closing frame b (20), a hollow main body blade closing frame c (21), a hollow main body blade non-closing frame a (22) and a hollow main body blade non-closing frame b (23) are welded on an I-shaped steel column (14) to form a hollow main body blade frame, and the surface of the frame is covered with an iron sheet to form a hollow main body blade (12); the control system (6) is respectively and directly connected with the electric hydraulic push rod a (1), the electric hydraulic push rod b (2), the electric hydraulic push rod c (4), the electric hydraulic push rod d (5) and the wind speed measuring instrument (7); when the wind speed is reduced to 20 m/s, if the wind speed is reduced continuously but is more than 15 m/s, the electric hydraulic push rod d (5) and the electric hydraulic push rod c (4) respectively control the movable vane sector d (11) and the movable vane sector c (10) to contract along with the reduction of the wind speed, and when the wind speed reaches 15 m/s, the movable vane sector d (11) and the movable vane sector c (10) are completely contracted; when the wind speed is less than 15 m/s, if the wind speed is continuously reduced but is more than 10 m/s, the electric hydraulic push rod b (2) and the electric hydraulic push rod a (1) respectively control the movable vane sector b (9) and the movable vane sector a (8) to contract along with the reduction of the wind speed while maintaining the movable vane sector d (11) and the movable vane sector c (10) to keep the contraction positions unchanged, and when the wind speed reaches 10 m/s, the movable vane sector b (9) and the movable vane sector a (8) are completely contracted; when the wind speed is increased to 10 m/s, if the wind speed is continuously increased but is less than 15 m/s, the movable blade sector a (8) and the movable blade sector b (9) are controlled to extend out along with the increase of the wind speed by the electro-hydraulic push rod a (1) and the electro-hydraulic push rod b (2) while the contraction state of the movable blade sector c (10) and the movable blade sector d (11) is maintained, and the movable blade sector a (8) and the movable blade sector b (9) are restored to the original positions until the wind speed is increased to 15 m/s; when the wind speed is increased to 15 m/s, if the wind speed is continuously increased but is less than 20 m/s, the movable blade sector a (8) and the movable blade sector b (9) are kept to be recovered, the electric hydraulic push rod c (4) and the electric hydraulic push rod d (5) control the movable blade sector c (10) and the movable blade sector d (11) to extend out along with the increase of the wind speed, and when the wind speed is increased to 20 m/s, the movable blade sector c (10) and the movable blade sector d (11) recover to the original positions; the control system (6) can control the electric hydraulic push rod a (1), the electric hydraulic push rod b (2), the electric hydraulic push rod c (4) and the electric hydraulic push rod d (5) to control the expansion and contraction of the movable vane sector a (8), the movable vane sector b (9), the movable vane sector c (10) and the movable vane sector d (11) according to the wind speed and according to the flow.
2. A fan blade with a movable blade sector according to claim 1, characterised in that: the movable blade sector a (8) is positioned at the front edge of the fan blade, the length of the movable blade sector a is one third of the length of the front edge of the blade from one ninth of the root of the blade at the front edge, and the width of the movable blade sector a is one fourth of the width of the root of the solid root (13) of the blade; the movable vane sector b (9) is positioned at the rear edge of the fan vane, and the length of the movable vane sector b is one third of the length of the rear edge of the vane from one ninth of the root of the rear edge of the vane, and the width of the movable vane sector b is one fourth of the width of the root of the solid root (13) of the vane; the movable blade sector c (10) is positioned at the front edge of the fan blade, and the length of the movable blade sector c is one third of the length of the front edge of the blade from the root part of the front edge of the blade by five ninth, and the width of the movable blade sector c is one fourth of the width of the root part of the solid root part (13) of the blade; the movable blade sector d (11) is located at the trailing edge of the fan blade, and is one third of the length of the trailing edge of the blade at the position of nine-fifth of the root of the trailing edge blade, and the width of the movable blade sector d is one fourth of the width of the root of the solid root (13) of the blade.
3. A fan blade with a movable blade sector according to claim 1, characterised in that: the movable vane sector a (8) and the movable vane sector c (10) have a spacing, and the length of the spacing is one ninth of the length of the front edge vane; movable vane sector b (9) and movable vane sector d (11) also have a spacing of one-ninth of the length of the trailing edge vane.
4. A fan blade with a movable blade sector according to claim 1, characterised in that: the electric hydraulic push rod a (1) is fixed in the hollow main body blade (12) at a position which is one fourth of the root of the main body blade, a movable push rod of the electric hydraulic push rod a (1) is welded with the circular steel column a (15), and the fixed end of the electric hydraulic push rod a (1) is welded and fixed with the I-shaped steel column (14); the electric hydraulic push rod b (2) is fixed in the hollow main body blade (12) at one quarter of the root of the main body blade, a movable push rod of the electric hydraulic push rod b (2) is welded with the circular steel column b (16), and the fixed end of the electric hydraulic push rod b (2) is welded and fixed with the I-shaped steel column (14); the electric hydraulic push rod c (4) is fixed in the hollow main body blade (12) at three quarters of the root of the main body blade, a movable push rod of the electric hydraulic push rod c (4) is welded with the circular steel column c (17), and the fixed end of the electric hydraulic push rod c (4) is welded and fixed with the I-shaped steel column (14); the electric hydraulic push rod d (5) is fixed in the hollow main body blade (12) from three quarters of the root of the main body blade, a movable push rod of the electric hydraulic push rod d (5) is welded with the circular steel column d (18), and the fixed end of the electric hydraulic push rod d (5) is welded and fixed with the I-shaped steel column (14).
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| CN202011406942.1A CN112483308B (en) | 2020-12-04 | 2020-12-04 | Fan blade with movable blade sectors |
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| CN202011406942.1A CN112483308B (en) | 2020-12-04 | 2020-12-04 | Fan blade with movable blade sectors |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6902370B2 (en) * | 2002-06-04 | 2005-06-07 | Energy Unlimited, Inc. | Telescoping wind turbine blade |
| KR20100103546A (en) * | 2008-01-30 | 2010-09-27 | 클립퍼 윈드파워, 인코포레이티드 | Retractable blade structure with a split trailing edge |
| KR20130024612A (en) * | 2011-08-31 | 2013-03-08 | 대우조선해양 주식회사 | Variable blade for wind power generator |
| CN103032277B (en) * | 2012-12-24 | 2015-03-18 | 湘电风能有限公司 | Blade of wind generating set and wind generating set comprising blade |
| CN104033339B (en) * | 2014-05-27 | 2017-01-18 | 上海通用风机股份有限公司 | Wind turbine blade |
| CN109681394B (en) * | 2018-12-26 | 2022-07-08 | 江苏金风科技有限公司 | Telescopic blade and wind generating set |
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