JP7131871B1 - Symmetric streamline blade spiral wind turbine - Google Patents

Abstract

To provide a wind power generator capable of generating power even under a drastic change in wind direction and speed, a typhoon or the like, being installable anywhere without causing noise or bird damage, and having a natural curvaceous beauty that easily blends into the scenery. SOLUTION: A wind turbine blade is made into a symmetrical streamline shape so that it can be autonomously controlled by its own drag force, and receives wind from two sides. By forming the blade length into an involute curve shape, it is possible to suppress frictional resistance, wind noise, bird strikes, etc. due to oblique air intrusion at the leading edge of the blade during rotation. In addition, the wing is easy to bend to the leeward side due to drag, and the dynamic three-dimensional deformation of the helical wing increases lift, and the flexible structure deflects strong winds and releases excessive drag to obtain lift. Furthermore, even if the direction of the wind changes abruptly, it is possible to obtain a wind turbine blade that can agilely follow the wind through autonomous yaw control with a narrow angle and that always rotates in the same direction. At the same time, installation in the air, etc. becomes easier. [Selection drawing] Fig. 2

Description

The present invention utilizes the drag force of the wind, which is a basic technology of fluid dynamics, to dynamically change the shape of the wing to efficiently obtain lift from weak to strong winds, making it easier to extract rotational drive energy. The present invention relates to a wind turbine technology for wind power generation that suppresses wind noise, etc., is friendly to people, and can be installed anywhere.

Wind power generation is an excellent means of generating electricity 24 hours a day, 24 hours a day, 7 days a week, regardless of the weather, as long as there is wind. In addition, there are problems such as output instability, wind noise and bird strikes due to sudden changes in wind direction and speed due to wind from buildings and verandas. However, the world's CO2 environmental regulations are becoming stricter year by year, and wind power generation is becoming more and more important. There is an urgent need to improve wind power generation technology that can generate electricity, does not require detailed control, and has durability.

Therefore, according to the ``Production of wind power generator blades in which both ends of the wing are fixed to the shaft'', a known patent (Patent Document 1: this document) twists it like a "pinwheel" made of paper and returns it backward Although there are attached figures 12 and 13), the patent of this application is a symmetrical streamlined blade, which is the basis of fluid dynamics, a spiral blade shape supported by one side, and a spiral shape that is autonomous and dynamic due to wind pressure In addition to the structure that increases the angle of attack by changing, the concept, features, and functional structure are completely different, such as the function that does not change the rotation direction due to the two-sided wind direction shape.

Next, as a similar example of a configuration in which the blade-shaped trailing edge is bent, in claim 1 of a known patent (Patent Document 2: Figures 14 and 15 attached to this document), "the tip of the propeller blade is in the front direction of the propeller blade. and an inclined portion is formed,” and Claim 2, “The center line of the inclined portion is inclined in the range of 25 degrees to 50 degrees with respect to the longitudinal direction of the propeller.” In the patent, there is no static inclination and it is flat, completely different from a symmetrical streamline wing. In claim 4, "the wind receiving part is set to be large at the tip edge of the propeller blade, and the wind receiving part is set wider at the tip than at the base in front of the propeller blade." However, in this patent, the tip and width remain the same and the shape is completely different with a curve.

In addition, in claim 6, "an inclined lateral groove is formed in the middle of the wind receiving part in the longitudinal direction, and the post-rotation part of the inclined lateral groove is located near the base end part and the tip part of the wind receiving part from the pre-rotation part of the blade. It is deeply slanted rearward even from the front", and claim 7 "is characterized in that the wing tip of the propeller is slanted in the front direction of the propeller and an inclined portion is formed", but this patent does not , the tip of the wing is even and does not tilt statically.

Furthermore, there is a known patent (Patent Document 3: Fig. 16 attached to this document) in which the structure of arranging wind turbines on both sides of Fig. 7 of the present invention is somewhat similar, and claim 1 states, "Wind turbine for wind power generator on the windward side. The wind direction is only one direction, and it is connected on the same axis However, in the patent of the present application, there is no rudder, and it is a structure in which the wind turbine rotation direction does not change even if the wind is received in the front and back directions, which is the feature of claim 2. The principle, structure, and function are completely different from that of a conventional stator-equivalent side generator that is reversed to obtain double the output with a relative difference.

Next, there is a known patent for cutting out a spiral shape (Patent Document 4: Figures 17, 18, and 19 attached to this document). A blade flat plate characterized by arranging a three-dimensional spiral blade in a state where it is in a state of being flat ”, and the rotation center shaft part is similar to “mosquito coil”, and from various examples in FIG. Although it is a spiral spiral shape with a structure in which the center side is only extended while being cut out and connected, the blade of this patent application has a symmetrical streamline blade shape with an angle of attack on both front and back sides, and can receive wind on both front and back sides. The tip of the is released, and the basic wing structure is completely different with a dynamic spiral structure that bends and contracts on the front and back.
In addition, in the various “cut out flat plate and stretch it vertically to create a spiral structure” in FIG. It seems that there is no optimum angle of attack, and it is difficult to turn. In addition, because the blade is thin, it is easy to vibrate and generate noise. In contrast to the dynamically questionable structure, the blade of this patent application is not a flat plate, but has a symmetrical streamline blade shape in cross section. The gradually thinning symmetrical streamline curved slope blade (100) is extended in the longitudinal direction with an involute curve (1101) structure, the tip of which is open, and has 7 types of characteristics, and the basic structure is completely different.

Further, as a configuration, FIG. 18 attached to this document and FIG. 31 of Patent Document 4 show a structure in which spiral windmills are placed on the left and right and supported at both ends and the center, and the directions of reversing each other are shown separately. A generator that generates electricity by the rotation of the rotor and stator connected to the two shafts 31", "Wind (41)", and only the left wind, and there is no explanation in the claim. Although the details are unknown without explanation, the patent of this application is a wing structure that can be reversed even if the wind blows from the front and back, a triaxial reversing generator (701), and a detailed structural explanation (Fig. 8). .

In addition, Fig. 19 attached to this document and Fig. 42 of Patent Document 4, "Conceptual Front View of Connected Tilting Wind Power Generator", are single-sided wind turbines with a structure that cannot be used in two directions. , The structure that is arranged four times in front and back is different from the front and back correspondence FIG. , structure and content are not comparable.

Japanese Unexamined Patent Application Publication No. 2006-17093 Method for manufacturing blades for fixed-end wind power generator (Figs. 12 and 13 attached to this document) Japanese Patent Laid-Open No. 2006-152957 Propeller and Horizontal Axis Wind Turbine (Figures 14 and 15 attached to this document) Japanese Patent Laid-Open No. 2013-241928 Portable twin-wheel wind power generator (Fig. 16 attached to this document) Patent No. 6103411 Blade flat plate, generator using it and its assembly kit, blower and its assembly kit (Fig. 17.18.19 attached to this document)

"Naohiko Iizuka ``Fundamental Fluid Dynamics'' April 8, 2010 Published by Sangyo Tosho Co., Ltd. P59-75, P120-143, etc.

Europe's radical LCA (Life Cycle Assessment) regulations are the most important in terms of future long-term safety and technological maturity, considering the life cycle cost of even solar panels and the problem of installation environment destruction. Wind power generation is a realistic and reliable means of obtaining clean power, but there is an urgent need to popularize large-scale, mainstream wind power generation that can generate power day and night, regardless of the weather.

In order to make it easy to use wind power generation, it is possible to generate power quietly day and night from unstable weak wind areas, severe operating environments such as storms and typhoons, residential areas, shades, north faces, etc., and high-rise buildings, condominiums, etc. A wind turbine blade structure that does not require detailed control and is easy to maintain and manage against the rapidly changing wind direction and speed of building wind, and durability that enables stable operation for a long period of time is required. As a means of reducing wind resistance, it is necessary to greatly increase only lift without increasing wind resistance, and at the same time, it is necessary to realize issues such as noise reduction and environmental friendliness.

As a rule for assigning code numbers of up to four digits in the following explanatory diagrams, the first two digits are the drawing number, and the last two digits are the number that appears in the drawing, but if the common part appears again in another drawing and is explained In addition, the drawing number of the first two digits and "-" hyphen are added, and when displaying more than one, "- and lowercase letters" are added at the end, and sometimes only representative examples are given .

As a means for solving the problem of claim 1, regarding a plurality of blades (100) constituting a windmill (200) such as a wind power generation, first, it becomes difficult to control from the outside in an operating environment where the wind direction and speed change drastically. Therefore, as a structure that eliminates the need for fine angle-of-attack control, from the rounded front edge (102), it is gradually narrowed down equally, forming symmetrical slopes on both sides along the way. As shown in the cross-sectional shape (101) of the mounting hole side (112) of the front and back symmetrical streamline shape closed with the trailing edge angle (111) at the trailing edge (103). forming a fixed face angle of attack (116) of each half of the edge angle (111) and an equally symmetrical back face angle of attack (117);

Furthermore, when the wind turbine rotates, as a means of suppressing the drag and greatly increasing the lift and realizing noise reduction , the leading edge side (102) of the blade is curved outside and the opposite trailing edge side (103) is inside the gear design. Forming a curved shape with a large bend near the mounting hole (112) like the curved blade (11-100) superimposed on the involute curve (1101), which is a rolling function that does not cause friction in the By constructing an involute curved blade (106) in which the curvature of the leading edge side is gradually reduced toward the blade tip (108), the cross-sectional shape (101 at the center of the curved shape) is maintained and the overall blade shape is obtained. As it goes to the air direction (1110), the structure that enters at an oblique angle (1111) reduces air resistance, resulting in drag and noise reduction. is formed, and at the same time, if either the front wind (114) or the back wind (115) hits this blade, it will be perpendicular to the wind, in the direction of the chord line (113) and the leading edge ( 102) Based on the principle that lift is generated in the direction, a symmetrical streamline curved slope wing (100) is formed that has a structure in which the direction of lift does not change regardless of whether the wind is received from either the front or back of the wing.

Next, as a means for solving the problem of claim 2, the symmetrical streamline curved slope blade (100) is used as a means for configuring a wind turbine (200) that eliminates the need for control for reversing the wind direction . ) side to the wind turbine outer peripheral tip (202), in parallel with the rotating sweeping disk surface (206) which is the center plane of the horizontal axis type wind turbine, the center line (113) of the symmetrical streamline curved slope blade (100) , so that the leading edge side (2-102) of each blade is on the forward side in the direction of rotation (203) and the trailing edge (2-103) side is on the rear side in the opposite direction of rotation. By arranging a plurality of blades at intervals to form a symmetrical streamline blade spiral wind turbine (200), if the wind hits either the front surface or the rear surface of each blade (2-100-a, b, c), each blade Due to the wind pressure to the front side angle of attack (116) and the symmetrical back side angle of attack (117), lift is generated in the direction of the leading edge (2-102) of each wing and added, resulting in a drastic change in the wind direction. A symmetrical streamline vane volute wind turbine (200) is formed, which always rotates in a fixed direction of rotation (203) .

In addition, as a means of obtaining lift by changing the blade shape due to drag, which is created by the flexible structure of the symmetrical streamlined curved slope blade (100), the outer peripheral tip side (202) of each rotor blade of the wind turbine is placed on the leeward side of the wind at that time Depending on the degree of wind strength in the Z-axis direction (207),
With the function of autonomous three-dimensional structural change under wind pressure (305) from the rear of the wind turbine, if it bends like a forward spiral shape (3-100-a, b, c), each blade will have a large chordal twist. At the same time as the bending tilt angle of attack (302), the long curved slope along the longitudinal direction of each wing also bends and helically tilts downwind, giving each wing the longitudinal twist bending angle of attack (303). ) is obtained as a large torque from the center of the wind turbine blade to the tip, and is added in the direction of rotation (304) ,
In addition, opposite to this wind direction, the forward spiral shape (5-100-a, 5-100-b, 5-100-c) is formed by the autonomous three-dimensional structure change function due to the wind pressure (505) from the front of the windmill. , each wing will have a large chordal twist deflection tilt angle of attack (502), and at the same time, the long curved slope along the longitudinal direction of each wing will also flex and spirally tilt downwind. , the lift generated by the torsional deflection angle of attack (503) in the longitudinal direction of each blade is obtained as a large torque from the center of the wind turbine blade to the tip,
In addition to the lift acquisition function by the autonomous drag control means for sudden reversal of the wind direction, which is always added to the fixed rotation direction (504) regardless of the wind from any direction,

Furthermore, as a means for obtaining lift in an unstable weak wind region, in a weak wind (601) environment, each trailing edge (103 ) and tip (108), a flexible structure trailing edge split flap (6-104) parallel to the chord line (109), which is also the centerline of the wing, and thinner than the trailing edge (103) of the wing. ) and a weak wind lift reinforcing tip flap (6-105), the curved shape (106) part of the symmetrical streamline curved slope wing (100) does not bend even in weak wind (601), autonomously In addition, only each flap (105, 104) bends in the downwind direction of the weak wind (601) at that time, so that the tip flap (6-105) of each wing changes the angle of attack representative diagram against the weak wind (601) (602) is formed, lift is generated in the direction of the leading edge (102), and because of the tip of the wing, it also has a weak wind lift force reinforcement means that can obtain a rotational force in a fixed direction with a large torque.

As a means for solving the problem of claim 3, as a concept that doubles the power generation performance and creates a function that facilitates installation that can generate power even in the air,
Two windmills (200) having a wide wind-receiving function are arranged on the left and right in opposite directions to form a windmill structure (710) that is always reversed to each other regardless of whether the wind is received from either the left or right, and each of the left and right is configured. By connecting the newly invented triple-axis reversing generator (701), which is structured so that the housing side of the generator can also rotate in reverse, between the windmills, the rotor-side permanent magnet (801) is connected to the reversing-side armature In more detail, the structure that rotates inside the coil (802) draws out a relatively doubled magnetic flux change, thereby doubling or more the power generation performance and at the same time reducing the weight and facilitating installation in the air.

First, the high-tension wire (805) that can be supported and fixed in the air, and the control line and the power extraction line (806) from the outside are penetrated together, and the fixed center shaft (705) of the first-layer shaft of the hollow structure that can be hung. and
On the left hollow rotary shaft (809) of the secondary shaft, from the left windmill (702), the left triple shaft bearing (807) of the generator and the rotary shaft (809) axis with the right triple shaft bearing (808) is supported and penetrated, connected to the rotor side permanent magnet (801), rotated upward (803),
Furthermore, the right windmill (704) and the double shaft reversing drive type triple shaft reversing generator (701) are connected on the right hollow rotating shaft (810) of the second axis, and are connected with the reversing side armature coil (802). Rotor-side permanent magnet (801) wraps around the reversing-side armature coil (802) and rotates inside it. A triple-axis inverted wind power generator (800) is configured to generate twice the electrical energy,
Then, this electric power can be rotated while maintaining electrical connection, and by taking it out through a transmission line (806) through a coupler (703) with a built-in rectifying circuit and a slip ring, the power generation capacity to weight ratio performance is higher than that of the conventional type. In addition, from the structure that facilitates installation in the air and connection connection, installation in the air in the valleys of mountainous areas, in the air between steel towers and towers, in the air between the top and bottom of cliffs, etc. This will eliminate the existing restrictions on installation locations and enable the expansion of wind power generation installations.

As an effect of the blade and windmill invention, the rounded leading edge (102) forms a sloping slope that is symmetrical to the front and equal to the back, each of which similarly has a trailing edge angle (111). The fixed front side angle of attack (116) and the equally symmetrical back side angle of attack (117) eliminate the need for angle of attack control in a rapidly changing natural environment. This eliminates the need for a complicated electric and mechanical control device for this purpose, reducing costs and improving durability.

In addition, when the wings are extended straight in the longitudinal direction to increase the lift force and increase the power generation output, the drag force increases rapidly in proportion to the length of the wind turbine rotation diameter squared, but on the involute curve (1101) By configuring the blade with an involute curve shape (106) in which the curve on the leading edge side gradually softens as it goes to the tip (108), like the curved blade (11-100) superimposed on the tip, Even if the diameter increases as it goes and the speed in the direction of the atmosphere (1110) increases, it becomes a curved shape that enters at a shallower oblique angle (1111), and the increase in air resistance is suppressed (formula with reference number 0028) The drag force In addition to the effect of suppressing noise and bird strikes at the same time,
Since the influence on the air density coefficient equivalent due to the increase in viscosity due to storms etc. is suppressed, the large air resistance (pressure drag) during typhoons etc. is reduced and the windmill is less likely to break.
Furthermore, the direction of the individual lift force does not change even if the wind is received from either the front or back of the wing, and the combined direction of rotation does not change.
Even if the wind direction suddenly reverses, the function always rotates in a fixed direction (203), which eliminates the need for wind direction reversal control and increases the wind receiving area. In addition to the effect of improving the wind turbine driving force by increasing

Furthermore, due to the flexible structure of the involute curved blades of the wind turbine, the outer circumference tip of each rotor blade of the wind turbine is enhanced by the autonomous dynamic angle of attack formation of the three-dimensional blade shape that makes use of the drag force of the wind. The side (202) is leeward of the wind direction at that time, and the front (Fig. 3) or rear ( 5), each wing provides a large chordal twist deflection tilt angle of attack (302 or 502) and, at the same time, a long curved slope along the length of each wing. , and the lift generated by each blade at the torsional deflection angle of attack (303 or 503) in the longitudinal direction is obtained as a large torque from the center of the wind turbine blade to the tip, and is rotated in the direction of rotation (304 or 504), in addition to the effect of the autonomous control function of the wind turbine that responds to a sudden reversal of wind direction,
Flexible structure trailing edge split flaps (typically 6-104 ) and light wind lift reinforcing tip flaps (6-105-a, b, c), by bending in the downwind direction of the weak wind (601) at that time, the tip flaps of each wing (6-105 ) forms an angle of attack representative diagram (602) against a weak wind (601), and lift is generated in the direction of the leading edge (102), and because of the tip of the wing, a rotational force in a fixed direction with a large torque is obtained. Wind uplift reinforcement effect is also obtained.

As an effect of claim 3, two windmills (200) having a wide wind receiving function (401, 402) are arranged on the left and right in opposite directions, which is a new effect, and even if the wind is received from either the left or right, A newly developed triple shaft reversing generator (701) with a concept that the windmill structure (710) that is always reversed to each other is configured and the housing side of the generator can also be reversed between the left and right windmills. ), a relatively double-speed magnetic flux change is created, and due to the integration and weight reduction effect due to the improvement of the power generation capacity to weight ratio , the structure that facilitates aerial installation and connection connection makes it difficult to install a tower in the past. By facilitating installation in valleys in mountainous areas, in the air between steel towers and towers, and between the top and bottom of cliffs, restrictions on installation locations are reduced, and more efficient wind power generation can be installed near consumption areas. An expansion effect can be expected.

It is a perspective view of a symmetrical streamline curved slope blade. 1 is a full perspective view of a symmetrical streamline blade spiral wind turbine; FIG. FIG. 10 is a diagram of a symmetrical streamline blade spiral windmill that is bent forward by wind pressure from the rear of the windmill. FIG. 10 is a diagram of a static symmetrical streamline blade spiral windmill in a state where wind pressure is weak and does not bend. FIG. 10 is a view of a symmetrical streamline blade spiral windmill bent backward by wind pressure from the front of the windmill. It is a diagram of a symmetrical streamline blade spiral windmill in which only the flaps are flexed forward in a weak wind (rearward in a headwind). FIG. 2 is a full perspective view of a reversible wind power generator with both wing tip shafts suspended; FIG. 2 is an internal structural diagram of a dual wing tip shaft suspension type triple shaft reversing generator (both wing tips are cut). It is an application example figure of a suspension type wind-power-generation line between mountaintops, valleys, etc. FIG. It is a prototype photograph for performance evaluation of a symmetrical streamline blade spiral wind turbine. It is a wind turbine configuration explanatory diagram in which one symmetrical streamline curved slope blade is superimposed on an involute curve. FIG. 1 of Patent Document 1. FIG. FIG. 5 of Patent Document 1. FIG. FIG. 2 is a representative diagram of Patent Document 2; FIG. 8 of Patent Document 2. FIG. FIG. 1 of Patent Document 3. FIG. FIG. 23 of Patent Document 4. FIG. FIG. 35 of Patent Document 4. FIG. FIG. 42 of Patent Document 4. FIG.

To describe an embodiment of the invention from the cross-sectional shape (101) on the blade mounting hole (112) side of claim 1, regarding a plurality of blades that constitute a wind turbine such as a wind power generation, the rounded front edge (102) ), the front and back wing thickness (107) is gradually reduced to be equally thin, and while forming symmetrical slopes on both sides in the middle, the trailing edge (103) closes with the trailing edge angle (111). The symmetrical streamlined cross-sectional shape (101) formed on the front and back forms sloped slopes that are symmetrical to the front and the same on the back, and each face is a fixed surface that is half the trailing edge angle (111). Forming a side angle of attack (116) and a back side angle of attack (117) that are equally symmetrical to form a basic form that facilitates obtaining lift,
As an example of the symmetrical streamlined curved slope wing (100) with this cross-sectional shape (101), an involute curve (1101) is used, in which the air resistance at the leading edge (102) is greatly reduced toward the tip. Incorporating, along the length of the wing, with the leading edge side (102) on the outside of the curve and the opposite trailing edge side (103) on the inside to form an involute curved (106) airfoil, the air resistance A symmetrical streamlined curved slope wing (100) is formed that can regularly reduce .

Here, with respect to an embodiment that dramatically reduces noise due to air resistance (pressure drag) of the blades during rotation, which is one of the important features of the wind turbine, the configuration of the curved blades can be calculated by overlapping with FIG. ,
Air resistance = CD value x frontal wind pressure area (= Sin (the oblique approach angle (1107 or 1111) in the longitudinal direction of the leading edge of the curved blade and the tangent line (1106, 1110) of the rotation circle corresponding to the air flow direction) angle θ)) × (square of velocity) × air density / 2
In the above equation, if the drag coefficient CD value of the leading edge (102) of the wing and the air density are constant and 1/2 is omitted,
In the description of the wind turbine (Fig. 11) in which the symmetric streamline curved slope blade (11-100) on the involute curve (1101) and the wind turbine rotation size ratio circle are superimposed,
First, as a speed difference, if we divide the rotation radius RL (1108) corresponding to the longitudinal direction of the blade from the rotation center (1102) of the wind turbine to the tip (11-202) into three equal parts, we can plot the rotation of each point Since the radius and speed are proportional, the center point P0 (1102), point P1 (1103: RL/3), point P2 (1104: RL/3×2), point P3 (1108: RL), and at point P1 If the speed at the time of rotation is set to a reference value of 1, the squared value of the speed at the remaining two points is the point P2 = 4 and the point P3 = 9, and the air resistance value at the plotted position of each point is calculated. if,
In the involute curved blade (11-100), the oblique approach angle of point P2 (1107) ≈ Sin (26 degrees) = 0.43 and the oblique approach angle of point P3 (1111) ≈ Sin (17 degrees) = 0.29, so that
Point P1+P2+P3=1+4*0.43+9*0.29 =5.33 ,
On the other hand, in the conventional straight wing (1112), Sin (90 degrees) = 1, and points P1 + P2 + P3 = 1 + 4 + 9 = 14
As a result, 5.33/14=0.38, the air resistance can be reduced by 0.38 times compared to the conventional straight blade .

In particular, the air resistance at the tip (1108) of the blade (11-100) is (1/0.29) 3.5 times better than the conventional straight blade wind turbine (1113), and the leading edge (102) has Wind noise is also suppressed, and obstacles, etc., roll and push away with a gentle increase, making bird strikes less likely to occur.
In addition, as an effect of the involute curve, the air density increases with respect to the viscosity of the rainstorm, so the large air resistance (pressure drag) during rain and wind is reduced, so it is difficult to break during a typhoon.
Furthermore, compared to the conventional straight blade wind turbine (1112), the actual blade length from the blade center to the tip (P1 to P3) is (P2 length × π/2/P2 length = π/2), which is about 1.5. Since the length is doubled and the area of contact with the wind is increased, the wind turbine configuration has the characteristic of increasing the driving torque. The length of the wing (100) in the longitudinal direction can be extended along the involute curve (1101) to about one lap of the base circle (1103).

As an embodiment of the wind turbine (200) of claim 2, from the wind turbine rotating shaft center (201) side to the rotation outer peripheral tip (202) of each blade, a rotating sweeping disc surface (206) that becomes the center plane of the horizontal axis type wind turbine is provided. ), along the centerline (113) of the symmetrical streamlined curved slope blade (100), the leading edge side (2-102) of each blade is forward in the direction of rotation (203) and the trailing edge ( 2-103) By arranging the required number of blades at equal intervals and at the same angle so that the side 2-103) is on the rear side in the opposite direction of rotation, the air resistance at the leading edge (102) during rotation can be reduced. A symmetrical streamline blade spiral wind turbine (200) can be constructed,
If the wind hits either the front side or the back side of each blade (2-100-a, b, c) in the Z-axis direction (207), the back side attack angle symmetrical with the front side angle of attack (116) of each blade Due to the wind pressure on the corner (117) , lift is generated in the direction of the chord line (113) and in the direction of the leading edge (102), which is perpendicular to the wind. A configuration is configured that rotates in a defined direction of rotation (203).

In addition, since this wind turbine has a wide wind receiving function on the front and back sides (401, 402), even if the wind hits any direction, it is not necessary to follow the wind direction when the wind direction suddenly reverses . Even against the wind from the north, the following angle width is less than 90 degrees (±45) when the wind direction changes. , and from the prototype evaluation results, no rudder is required.
Furthermore, due to the structure that easily bends in the three-dimensional direction of the Z axis (Fig. 3, Fig. 5), the resistance against strong winds is easily transferred to the leeward, and the receding angle is the angle of attack ( 302, 303, 502, 503), the lift of the long and wide blade is generated, and the disk-shaped sweep surface (206) is from the center to the tip of the wind turbine blade, so large torque can be obtained, and the optimal blade structure form becomes.

In the case of storms such as typhoons, it is better to generate power by autonomous control while adjusting the power factor and applying a load to rotate slowly, in response to fluctuations in generated power due to changes in wind speed. It can be said that it is safer and does not lead to destruction than stopping by applying the brakes like , controlling the angle of attack and the direction of the wind, which becomes difficult to counter the huge wind force, and stopping the strong wind.

As an embodiment of the reversible wind power generator (700) suspended on both wing tip shafts of claim 3, two wind turbines (200) having a wide wind receiving function are arranged in opposite directions on the left and right, and the wind is A windmill structure (710) that always inverts each other even when receiving power is formed, and between the left and right windmills, a triple shaft inversion generator (701) that can also invert the housing side of the generator is connected. By doing so, a double-speed magnetic flux change is given relatively between the armature coil (802) and the rotor-side permanent magnet (801) to more than double the power generation performance. A reversible wind turbine generator (700) suspended on both wing tip shafts, which facilitates installation (902, 903), is constructed.

Furthermore, as an example of a double shaft end suspension type triple axis inverted wind power generator (800),
First, the high tension wire (805) that can be supported and fixed in the air, the control line and the power output line (806) from the outside are passed through together, and the fixed center shaft (705) of the first shaft of the hollow structure that can be hung is inserted. put ,
On the left hollow rotating shaft (809) of the second axis , from the left windmill hub (702), the rotating shaft (809) with the left triple shaft bearing (807) and the right triple shaft bearing (808) of the generator. ) supports and penetrates the shaft, connects with the rotor side permanent magnet (801), rotates upward (803),
In addition, the right windmill hub (704) and the double-end reversing drive type triple shaft reversing generator (701) are connected on the right hollow rotating shaft (810) of the second axis, and are connected to the reversing side armature coil (802). Rotor-side permanent magnet (801) wraps around the reversing-side armature coil (802) and rotates inside the rotating rotor-side armature coil (802). A coupler with a built-in rectifier circuit and a slip ring (703) that can rotate while maintaining an electrical connection to generate twice the electric energy generated by the triple-axis inverted wind power generator (800). ) through a power transmission line (806), a wind turbine generator with improved power generation capacity-to-weight ratio performance compared to the conventional type is configured.

In the embodiment of FIG. 9, the triple-axis inverted wind power generator (800) suspended at both blade shaft ends can be installed in a mountainous area, which has been difficult to install in the past, because of the structure that facilitates installation in the air and coupling connection. If you use the air in the valley, between the peaks (909, 910), between the top and bottom of the cliff, etc., there is no need for high -place construction such as towers and steel tower construction, and you can install it in the air at low cost with only the surface rights of the air lease. It is possible to investigate the direction of the wind in advance. , and 90 degrees, and direct the other, both blade shaft end suspension type wind power generation W / E (903) in the east-west direction, in the wind direction E (908) and the wind direction W (907) If necessary, multiple units are connected and hung and arranged in an omnidirectional manner (900) by diagonal installation. It becomes an embodiment corresponding to a new technology that is easy to implement.

As for the manufacturing materials, light, flexible and durable materials such as glass fiber are used for medium-sized and large class wind turbine blades, and flexible silicon rubber and urethane foam are used for small wind turbines that can be used on balconies. It is lightweight, easy to process, and easy to handle.In addition, the wind direction and yaw movement of the wind turbine is narrow, within 90 degrees, even in severe operating environments where the wind direction and speed change drastically, and there is no need to control the angle of attack of the blades. As a result, it has a structure that can withstand strong winds without a large rudder.

100 Symmetrical Streamline Curved Slope Blade 101 Cross Section of Symmetrical Streamline Curved Slope Blade (Airfoil)
102 Leading edge 103 Trailing edge 104 Trailing edge split flap 105 Light wind lift reinforcing tip flap 106 Involute curve shape 107 Blade thickness 108 Tip part 109 Wing chord length (length of the chord line)
110 Bending angle 111 Trailing edge angle (total angle of angle of attack on back side equal to angle of attack on front side from centerline)
112 mounting holes (3)
113 center line (also equal to chord line)
114 Wind to the surface of the blade 115 Wind to the rear surface of the blade 116 Angle of attack on the front surface 117 Angle of attack on the rear surface 200 Symmetrical streamline blade spiral wind turbine 201 whose rotation direction does not change even if the wind direction is suddenly reversed Rotation shaft center 202 Outer circumference tip 203 Rotation direction 204 Generator 205 Wind-direction rotating bearing 206 Rotating sweeping disk surface 207 that serves as the center plane of the horizontal axis type wind turbine Z-axis direction 208 Tower 209 Wind direction sudden reversal 2-100-a Symmetrical streamline curved slope blade a incorporated as a wind turbine
2-100-b Symmetric streamline curved slope blade b incorporated as a wind turbine
2-100-c Symmetric streamline curved slope blade c incorporated as a wind turbine
301 Autonomous forward spiral change blade 302 Chord twist deflection tilt angle of attack 303 Blade longitudinal twist deflection angle of attack 304 Wind turbine rotation direction 305 Wind from behind the generator 3-100-a Autonomous forward spiral change wing a
3-100-b Autonomous forward spiral change wing b
3-100-c Autonomous forward spiral change wing c
401 Estimated left up/down wind 402 Estimated right up/down wind 403 Fixed direction of rotation 404 Estimated sudden upwind 405 Estimated sudden downwind 501 Autonomous backward spiral change blade 502 Chord twist deflection inclination angle of attack 503 Blade Longitudinal torsional deflection angle of attack 504 Wind turbine rotation direction 505 Wind from front 5-100-a Autonomous backward spiral change a
5-100-b Autonomous backward spiral changeb
5-100-c Autonomous backward spiral change c
601 Light wind 602 Representative display of the angle of attack of the tip flap (wings a, b, and c are also available)
603 Rotation direction 6-100-a Symmetric streamline curved slope blade a assembled as a windmill
6-100-b Symmetric streamline curved slope blade b assembled as a windmill
6-100-c Symmetric streamline curved slope blade c assembled as a wind turbine
6-104 Representative display of trailing edge split flap (visible side is displayed)
6-105-a tip flap a
6-105-b tip flap b
6-105-c tip flap c
700 Reversible wind power generator suspended from both wing tip shafts 701 Double-end reversal drive triple shaft reversal generator 702 Rotor drive side "Symmetric streamline blade spiral windmill" hub 703 With rectifier circuit built-in slip ring (rotary connector) Coupling 704 Hub 705 of oppositely connected “symmetrical streamline blade spiral windmill” Hollow shaft for transmission line and high tension wire integral cable penetration
706 Direction of rotation of the left windmill
707 Reverse rotation direction of right windmill 708 Rotor side windmill bearing
709 Armature side wind turbine bearing bearing
710 800 Triple-axis reversing wind power generator with both blade shaft ends suspended (700 internal structure drawing)
801 Rotor side permanent magnet 802 Reverse side armature coil 803 Rotation direction of left windmill 804 Reverse rotation direction of right windmill 805 High tension wire 806 Power transmission line and control inspection signal line 807 Left triple shaft bearing 808 Right triple shaft bearing
809 Left hollow rotating shaft (left slanted line hatching display)
810 Right hollow rotating shaft (reverse rotation side: right sloping line hatching display)
900 Omni-directional wind power generator suspended by changing the direction of 90 degrees at a place where the wind direction changes drastically 901 Power line and high tension wire integrated cable 902 Both blade shaft end suspension type wind power generation N / S wind 903 Both blade shaft ends Suspended wind power generation W/E for wind 904 Buildings, summits, transmission towers, towers, etc. can be used together 905 Wind direction North 906 Wind direction South 907 Wind direction West 908 Wind direction East 909 Summit A
910 Summit B
911 Lead-in tower to substation 1001 Symmetrical streamline curved slope blade holding frame 1002 Symmetrical streamline curved slope blade leading edge 1003 Symmetrical streamlined curved slope blade trailing edge 1101 Involute curve 1102 Center point P0 ( windmill rotating shaft)
1103 Circle of radius P1 and point of contact P1 on involute curve
1104 A circle of radius P2 and the leading edge of the wing (102) and the point of contact P2 on the involute curve
1105 Circle of radius P2 and vertical line of contact point P2 1106 Point P2 tangent line of circle (air rush direction during rotation)
1107 Bevel entry angle θ of wing leading edge (102) on point P2
1108 Point of contact P3 on circle with radius RL and outer periphery tip (202) of blade and involute curve
1109 Vertical line of point P3 on radius RL circle 1110 Tangent line of point P3 circle (air rush direction during rotation)
1111 Oblique approach angle θ of outer peripheral tip (202) of blade on point P3
1112 Shape and area of conventional straight blade wind turbine 1113 Approach angle θ (90 degrees) of conventional straight blade wind turbine
1114 Circle of radius P1 1115 Circle of radius P2 1116 Circle of radius RL (also circle of P3)
1117 Wind turbine rotation direction 11-100 Symmetric streamline curved slope blade (100) in Fig. 1
11-202 Perimeter tip (202) of wind turbine panoramic view in Figure 2

Claims (3)

In order to suppress the drag force of the wind, increase the lift force, and at the same time reduce the noise in the blades that make up the wind turbine for wind power generation, first of all, the cross-sectional shape (101) on the side of the mounting hole (112) at the rotation center of the wind turbine is rounded. At the leading edge (102) held, the front and back wing thickness (107) width is gradually narrowed equally, and on both sides in the middle, symmetrical sloping slopes are formed, and the trailing edge (103) It forms a symmetrical streamlined cross-sectional shape (101) closed with a trailing edge angle (111), and this centerline (113) is a symmetrical wing, so it is a straight line and coincides with the chord line (113). and when viewed from the front and back sides, the front and back sides have equal sloped slopes, each side being symmetrical with a fixed front side angle of attack (116) half the trailing edge angle (111). A feature (1) that eliminates the need for angle-of-attack control by forming the rear-side angle-of-attack (117);
Next, in order to extend the blade in a curved line in the long axis direction with this cross-sectional shape (101), the leading edge side (102) is on the outside of the curved line, and the opposite trailing edge side (103) is on the inside. Like the curved wing (11-100) superimposed on the curve (1101), the portion near the mounting hole (112) forms a curved shape with a large bend, and the leading edge side is curved toward the tip of the wing (108). By forming the blade with an involute curved shape (106) that gradually reduces bending, the turning radius RL (1116) increases toward the tip, and the wind pressure in the direction of the tangential line (1110) of the P3 circle also increases. On the contrary, the oblique angle (1111) gradually becomes shallower and enters the atmosphere, so the air resistance is suppressed and the noise can be reduced.
Furthermore, if either the front wind (114) or the back wind (115) hits this blade, it will be in the direction of the center line (113), which is also the chord line, which is perpendicular to the wind, and the leading edge (102) ) from the principle that lift is generated in the direction of the wing, it is composed of a symmetrical streamline curved slope wing (100) that also has the feature (3) that the direction of lift does not change even if the wind is received from either the front or back of the wing. A symmetrical streamline blade spiral wind turbine.

In order to configure a wind turbine with the "symmetrical streamlined curved slope blade (100)" according to claim 1, the horizontal axis type The leading edge side (2-102) of each blade extends along the centerline (113) of the symmetrical streamlined curved slope blades (100) parallel to the rotating sweep disk surface (206) in the center plane of the wind turbine. Rotation of each blade by arranging the required number of blades at equal intervals and at equal angles so that the front side of the rotation direction (203) and the trailing edge (2-103) side are on the rear side of the opposite rotation direction. A symmetrical streamline wing spiral wind turbine (200) having the feature (4) of suppressing air resistance at the leading edge of time (2-102) and suppressing wind noise and bird strikes can be constructed,
If the wind hits either the surface or the back surface of each blade (2-100-a, 2-100-b, 2-100-c) in the Z-axis direction (207), the angle of attack on the surface side of each blade ( 116) and symmetrical wind pressure to the rear side angle of attack (117) creates lift in the direction of the leading edge (2-102) of each wing (2-100-a, b, c). The feature (5) that does not require control for reversing the wind direction from the function that always rotates in the fixed rotation direction (203) even if the is suddenly reversed,
Furthermore, as a dynamic blade shape change produced by the flexible structure of each blade (2-100-a, b, c), the outer peripheral tip side (202) of each rotor blade of the wind turbine becomes the leeward of the wind direction at that time Z The forward spiral shape (3-100-a, 3-100- b, 3-100-c), each wing has a large chord twist deflection tilt angle of attack (302) and at the same time the length of each wing (3-100-a, b, c) The slope of the long curve along the longitudinal direction also bends and tilts downward in a spiral, and the lift generated by the longitudinal direction torsional deflection angle of attack (303) on each blade is a large torque from the center of the wind turbine blade to the tip. and is always added in the fixed direction of rotation (304),
On the contrary, opposite to this wind direction, the forward spiral shape (5-100-a, 5-100-b, 5-100- c), each wing has a large chord twist deflection tilt angle of attack (502) , and at the same time, a long curve along the longitudinal direction of each wing (5-100-a, b, c) The slope of the wind turbine also bends and tilts downwind in a spiral shape, and the lift generated by each blade with the torsional deflection angle of attack (503) in the longitudinal direction is obtained as a large torque from the center of the wind turbine blade to the tip, and is always fixed. In addition to the feature (6) of the autonomous control function for sudden reversal of wind direction, which is added to the rotation direction (504) ,
As an operation at the time of light wind (601), the trailing edge (103) of each blade of multiple symmetrical streamline curved slope blades (6-100-a, 6-100-b, 6-100-c) and On each of the tips (108), on the centerline of the wing, is a flexible structure trailing edge split flap (6-104) thinner than its trailing edge (103) and a light wind lift reinforcement tip flap (6-105). a, 6-105-b, 6-105-c), even in a weak wind (601) with a wind speed of about 2 m/s, the symmetrical streamline curved slope blade (100) does not bend, and each Only the flaps (105, 104) bend in the leeward direction of the weak wind (601) at that time, so that the tip flap (6-105) of each wing changes the tip flap angle of attack (representative code number 602) creates lift in the direction of the leading edge (102), and because of the tip of the wing, a rotational force ( 603 ) in a fixed direction with torque is obtained. , a symmetrical streamline blade spiral wind turbine with a total of seven characteristic functions.
Various features of the "symmetrical streamline curved slope blade (100)" according to claim 1, and the various features of the "symmetrical streamline curved slope blade (100)" according to claim 2 are further combined to create a new As an invention that draws out the characteristics,
Two wind turbines (200) having a wide wind receiving function are arranged in opposite directions on the left and right to form a wind turbine structure (710) that always reverses each other regardless of whether the wind is received from either the left or right. By connecting the newly developed triple-axis reversing generator (701), which can also reversely rotate the housing side of the generator , between each windmill, the internal armature coil (802) and the rotor side permanent magnet are connected. (801) provides a relatively double speed change in magnetic flux to more than double the power generation performance, and at the same time facilitates aerial installation (902, 903) in high places with high airflow. In more detail, the structure of the downward reversing wind turbine generator (700) is as follows:
First, the high tension wire (805) that can support and fix everything in the air, and the control line and the power extraction line (806) from the outside are passed through together to fix the central shaft of the hollow structure that can be suspended in the air. Place the hollow shaft (705) for
On the left hollow rotating shaft (809) of the second axis , from the left wind turbine hub (702), the rotating shaft (809) is rotated by the left triple shaft bearing (807) of the generator and the right triple shaft bearing (808). It is supported and penetrated, connected to the rotor side permanent magnet (801) inside the triple shaft reversing generator (701), and rotated upward (803),
Furthermore, the right windmill hub (704) and the case of the double-end reversing drive type triple shaft reversing generator (701) are connected on the right hollow rotating shaft (810 ) of the second axis, and the built-in reversing side armature coil is connected. By connecting with (802) and integrally rotating in reverse (804), the rotor side permanent magnet (801) is covered with the reversing side armature coil (802), and both wing shafts are structured to rotate in reverse to each other. An end-suspended triple-axis inverted wind power generator (800) is constructed to obtain twice the electrical energy,
Then, by extracting this power through a power transmission line (806) through a coupler (703) with a slip ring with a built-in rectifier circuit that can rotate while maintaining electrical connection so that this power can be extracted, the power generation capacity versus weight is greater than that of the conventional type. The symmetrical streamline vane spiral wind turbine according to claim 2, which has the characteristic (8) of having excellent specific performance and facilitating aerial installation and connection .

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