JP6126287B1 - Vertical axis spiral turbine - Google Patents

Abstract

An object of the present invention is to achieve a vertical axis spiral turbine that can further increase the lift of blades to further improve the utilization efficiency of wind energy and the like, and can be easily and reliably started. A vertical axis spiral turbine according to the present invention is connected to a rotating shaft body 11, has a blade width in the direction of the rotating shaft 10 and a chord length in the rotating direction of the rotating shaft 10. Are provided with a plurality of blades 20 formed in a logarithmic spiral shape from the blade tip 91 to the blade root 92, a small so-called vortex generator 50 arranged on the blade surface, and a so-called winglet 60 at the blade tip. Further, the arm portion 30B connecting the blade 20 and the rotary shaft body 11 is also formed in a spiral shape or a logarithmic spiral shape, and has an aerofoil shape so as to have a sub wing effect. [Selection] Figure 1

Description

  The present invention relates to, for example, a vertical axis spiral turbine, and more particularly to a vertical axis spiral turbine (vertical axis wind turbine) for use in wind power generation or the like.

  Turbines used for wind power generation and the like are roughly classified into a horizontal axis turbine whose rotation axis is parallel to the wind direction and a vertical axis turbine whose rotation axis is perpendicular to the wind direction. Horizontal axis turbines are mainly lift type, and include propeller wind turbines, Dutch wind turbines, and multi-blade wind turbines. The vertical axis turbine is classified into a drag type represented by a Savonius type and a lift type represented by a gyromill turbine, a Darrieus turbine, and a straight blade turbine.

  A typical propeller wind turbine as a horizontal axis turbine has a blade root fixed to a rotating shaft by a hub or the like, and the direction of the radius of rotation around the rotating shaft is the blade width, and the tip is the blade tip. Yes, it is the mainstream for current wind turbines.

  The horizontal axis turbine is said to have higher wind energy conversion efficiency (hereinafter referred to as “efficiency”) than the vertical axis turbine, but the wind receiving surface is perpendicular to the wind direction. The direction of the rotating shaft must be changed to match the direction of the rotation shaft, and a direction control mechanism is required, and at the same time, a loss occurs whenever the wind direction changes. In addition to requiring a height of more than twice the wingspan, it also requires a 360-degree installation area with the wingspan as the radius. In addition, since the nacelle for storing the generator and the like must be arranged at a high place, it is difficult to perform maintenance, and certain considerations are required by a structure that supports a high center of gravity and a control mechanism for ensuring safety. That is, the horizontal axis turbine is disadvantageous in an area where the wind direction is likely to change, and requires a large installation area, and the mechanism itself is complicated and expensive.

  On the other hand, the vertical axis turbine can be fixed perpendicular to the ground so that the rotation axis is always perpendicular to the wind direction. Instead of attaching the blade directly to the rotating shaft, it is common to maintain a constant radius with a disk-shaped pedestal or horizontally extending arm, etc., and make the span parallel to the rotating shaft the wing span It is. Since there is no dependency on the wind direction, the direction control device is not necessary, and a heavy object such as a generator can be arranged below the ground. Therefore, a simple and highly stable structure can be obtained as compared with the horizontal axis turbine. Further, even if the blade width is increased, the rotation radius is not enlarged, so that the installation area can be reduced.

  In such a vertical shaft type turbine, a lift type represented by a gyromill type turbine, a Darrieus type turbine, and a straight blade type turbine can obtain a higher output than a drag type represented by a Savonius type. However, the lift type has a problem of low self-starting property.

  Therefore, in the lift-type field of vertical shaft turbines, various efforts have been made to improve the low self-startability, but other mechanisms are used only to improve self-startability. In many cases, the cost increases accordingly, and a stable output cannot be obtained at high speed. Under such circumstances, the straight blade turbine, which is considered to have the highest wind energy conversion efficiency among the vertical axis turbines, is inclined on the blade rotation trajectory by giving the blade a receding angle (the blade is A vertical axis turbine (hereinafter also referred to as “helical turbine”) has been developed (Patent Document 1).

  Such helical turbines have an airfoil cross-section and are configured to obtain rotation primarily by lift, but due to the helical shape, one of the blade cross-sections is always subject to fluid flow at all rotational angle phases. An optimum angle of attack is guaranteed. Similarly, in all rotation angle phases, it is guaranteed to have a cross section that can obtain a rotation moment by a drag force. This facilitates self-starting of the turbine and stabilizes rotation.

  In addition, with respect to the helical turbine, the blade is inclined and deformed so that the position at the center of the blade width is the maximum rotation radius and the blade tip is the minimum rotation radius, and a plurality of blades are connected by a ring-shaped body. By adopting a barrel shape, a vertical axis spiral turbine that has been improved mainly to improve its structural strength has also been developed (Patent Document 2).

Japanese National Patent Publication No. 11-506180 Japanese Patent No. 5651680

  A vertical axis spiral turbine that is advantageous in terms of installation area and maintainability is required to have higher conversion efficiency of wind energy, etc., and further ease and certainty of self-starting performance. Therefore, in the present invention, the vertical moment type that can increase the rotational moment due to the lift / drag generated by the blades of the vertical axis turbine to further improve the utilization efficiency of wind energy and the like, and can easily and reliably self-start. The realization of a spiral turbine was an issue.

<Basic shape>
In order to solve the above-mentioned problem, a first aspect of the present invention is a logarithm along the axial direction of the rotary shaft having a rotary shaft and a cross section of an airfoil that rotates around the rotary shaft. The blade includes a blade formed to change in a spiral shape, and an arm portion that connects the rotating shaft body and the blade. That is, for example, as shown in FIG. 1 (however, the invention is not limited to that shown in FIG. 1. Similarly, in the “Means for Solving the Problems” section, the drawings are displayed after “for example”. In this case, the aspect of the present invention is not limited to the drawings shown), and the rotation shaft body and, for example, the length direction of the rotation shaft body as shown in FIG. As shown in the figure, a vertical shaft type in which a blade with a blade-shaped cross section whose length in the rotation circumferential direction of the blade is a chord is connected to a rotating shaft body by a disk-like pedestal or a horizontally extending arm portion, etc. Configured as a spiral turbine shape. For example, as shown in FIG. 2, the blade has a receding angle so that the blade tip moves backward with respect to the blade root, and the radius from the rotating shaft is widened from the blade root to the blade tip side as shown in FIG. A shape having a substantially logarithmic spiral leading edge and trailing edge is formed by an enlargement angle θ (0 degrees <θ <90 degrees). The expansion angle θ is the same as the pitch of the logarithmic spiral.

<Effects of basic shape features and overall shape>
The vertical axis logarithmic spiral turbine having the above configuration has a receding angle like a conventional helical turbine, so that it is guaranteed that one of the blade cross sections is always in an optimum position with respect to the fluid flow. Therefore, the self-starting of the turbine can be facilitated and the rotation can be stabilized. In addition, the vertical axis logarithmic spiral turbine is inclined so that the entire blade has a rotation radius extending from the blade root to the blade tip side by the enlargement angle θ, so the length of the leading edge or trailing edge is calculated by blade width ÷ sign θ. Therefore, the lengths of the leading edge and the trailing edge are longer than those of the conventional straight blade turbine and helical turbine having the same scale blade width and turning radius. This expands the area per blade, which is advantageous for obtaining energy by receiving wind regardless of drag and lift. Therefore, it can be expected that the initial starting performance is improved by an increase in the drag particularly required at the initial operation of the turbine, and at the same time the torque at the rotation is increased by an increase in the lift.

<Effects of fluid flow in basic shape>
In the vertical axis logarithmic spiral turbine having the above-described configuration, the rotational radius increases from the blade root toward the blade tip as described above, so that the peripheral speed on the blade tip side is always faster than the blade root. That is, the flow speed on the blade surface is always higher on the blade tip side than on the blade root side. As the fluid velocity increases according to Bernoulli's theorem, the pressure drops, so that the blade tip side is more negative than the blade root side. Here, since the blade tip side is retracted with respect to the rotation axis rather than the blade root, for example, as shown in FIG. 4B, a secondary flow from the blade root on the pressure side toward the blade tip on the suction side. Will occur.

  Especially in the rotation angle phase (a rotation angle phase corresponding to between 2 o'clock and 4 o'clock in the case of clockwise rotation) that generates a large lift in a vertical axis turbine, the flow of fluid resulting from the pressure difference generated by the difference in peripheral speed By combining the uniform flow flowing into the turbine, the flow on the upper surface and the lower surface of the blade is accelerated while being always pulled up to the blade tip side. Assuming that the flow of fluid flowing into the turbine is originally horizontal, the conventional vertical axis turbine flows in the two-dimensional horizontal direction behind the turbine, but in the vertical axis logarithmic spiral turbine, It is predicted that the flow is inclined in a three-dimensional manner obliquely upward and backward due to the pulling effect and the inclination angle due to the negative pressure described above. This means that the fluid has acted on a longer distance on the blade surface within a single time.

  This effect can be said to be the same as increasing the chord length and increasing the lift, but since the chord length is not actually increased, the amount of fluid flowing into the turbine is not reduced. In general, the output energy amount P of the turbine is obtained from the rotational angular velocity ω [rad / s] and the torque Q [Nm] as shown in the formula [1]. Further, the ratio of the surface area of the actual blade to the wind receiving area in the windmill is called solidity, and the relationship between the solidity, the rotational angular velocity, and the torque is shown in the following [Table 1]. That is, to increase the torque, it is necessary to increase the solidity (enlarge the chord length), and accordingly, the amount of fluid flowing into the turbine per hour decreases, and the rotational angular velocity decreases. That is, the torque and the rotational angular velocity are in a contradictory relationship via the solidity. In this regard, the present invention intends to increase the torque by expanding the surface on which the lift works by tilting the fluid flow in three dimensions without decreasing the rotational angular velocity so as not to increase the solidity. doing. That is, the energy conversion efficiency Cp in Equation [2] for obtaining the output energy amount of the windmill is increased.

<Deformation element and modification of basic shape>
This basic shape includes the shape of the airfoil (leading edge radius size, chord length, etc.) and blade width, the receding angle introduced by the helical turbine, and the radius expansion angle introduced by the present invention. It is configured with a conceptual element of θ. Here, in order to obtain the effect of the logarithmic spiral described above, it is only necessary that the basic shape is incorporated in a part of the wing. Depending on the installation environment and the characteristics of the generator, the performance of the blades may be advantageous when the torque is increased or may be advantageous when the rotational speed is increased. This can be achieved by changing the solidity mainly by adjusting the chord length, but the chord length and the receding angle do not necessarily have to be fixed. For example, when the receding angle and the solidity in the horizontal cross section are fixed, for example, FIG. 5A shows an example, but the chord length increases from the blade root toward the blade tip. Further, when the receding angle of the leading edge and the chord length are fixed, for example, FIG. 5B shows an example, but the receding angle of the trailing edge is naturally reduced. In the case of forming a so-called tapered shape in which the chord length is reduced toward the blade tip, for example, as shown in FIG. 5C, the leading edge receding angle is gradually increased toward the blade tip, or the trailing edge The receding angle is gradually reduced.

  In addition to adjusting the chord length and receding angle, the enlargement angle θ (= logarithmic spiral pitch) can be changed in the middle of the blade width. For example, when the enlargement angle θ is 0 degree, the shape is the same as that of a conventional straight airfoil turbine or helical turbine, but the combination of this and the logarithmic spiral shape keeps the radius of rotation constant. This is effective as a means for expanding the blade width. It is possible to join a logarithmic spiral shape to a conventional straight airfoil turbine or a helical turbine as a blade root side, a blade tip side, or both, and to repeat the reverse pattern and the joining alternately. For example, in FIG. 6, the portion e is the same as that of the helical turbine, θ = 0 degrees.

<Effects by introducing slits>
As a second aspect of the present invention, in the first aspect of the present invention, the blade may include one or more slits formed in the direction of the blade width of the airfoil. In general, when the wind direction is stable, the horizontal axis turbine has higher energy conversion efficiency than the vertical axis turbine. This is because when the wind receiving surface of the horizontal axis turbine is orthogonal to the wind direction, the blade can rotate with the same exact angle of attack at all positions of 360 degrees of the rotation angle phase. On the other hand, in the vertical axis turbine, the angle of attack changes at all positions where the rotation angle phase of the blade is 360 degrees, and the method of generating a moment and the energy conversion efficiency change by receiving wind. In addition, in the vertical axis turbine, there is a rotation angle phase that makes it difficult to generate lift and causes a stalled state. Furthermore, there is a rotation angle phase in which the frictional drag in the direction opposite to the rotation direction also increases in the rotation angle phase at which the stalling state occurs. In the case of a turbine whose rotation direction is clockwise with the blade upper surface as the inside of the turbine, this is the case when the rotation angle phase is in the position of approximately 4 o'clock to 6 o'clock.

  In order to reduce as much as possible the rotational angle phase that this vertical shaft turbine can avoid and avoid, it is possible to divide the blade into a plurality of sub-blades, From the outside toward the back in the rotational direction, a slit is installed so that the fluid can escape obliquely from the outside of each sub blade to the inside of the next sub blade. By providing the slit, for example, as shown in FIG. 7, a vigorous flow is sent from the lower surface of the blade on the wind inflow side to the upper surface of the blade, and the flow velocity on the upper surface of the blade that is behind the gap is recovered. Is attenuated. As a result, it is possible to expect two effects that the separation of the fluid in the boundary layer on the upper surface of the blade is delayed, the lift of the blade is maintained, and the large friction effect opposite to the rotation generated on the lower surface of the blade is reduced.

  The slit is preferably shaped so that the next sub-blade overlaps so that the slit becomes invisible when the angle of attack is approximately 90 degrees. By doing this, it becomes difficult for the fluid to escape from the slit after the rotation angle phase in the 6 o'clock direction, where the moment of rotation is obtained mainly with the drag, and the influence can be suppressed. This method using slits is particularly effective when the blade upper surface is directed toward the inside of the turbine. However, even if the blade upper surface is directed toward the outside of the turbine, a certain effect can be achieved. . In that case, the flow is sucked into the upper surface or the lower surface of the blade to prevent the flow velocity from being attenuated.

<Effect of delay of fluid separation due to turbulent flow on blade surface>
As a third aspect of the present invention, in the first aspect or the second aspect of the present invention, the blade includes a vortex generator as a fluid vortex generating mechanism for generating a fluid vortex on the surface of the airfoil. It is good also as a composition. In other words, the vortex generators such as a plurality of small wedge-shaped convex shapes and a plurality of small concave-shaped concave shapes as shown in FIG. 8A can be arranged on the blade upper surface or the blade lower surface of each blade. An example of a mode in which a vortex generator is actually arranged is shown in FIG. 8B, for example. Since the vortex generator generates a small eddy current on the blade surface of the blade to increase the momentum of the boundary layer and suppress fluid separation from the blade surface, fluid separation during a rotation angle phase with a large angle of attack is prevented. It can be delayed to prevent a reduction in lift.

<Outflow suppression effect due to the dogtooth shape of the leading edge>
When the blade is formed with a large receding angle of the leading edge of the blade, for example, as shown in FIG. 9A, an outflow in which the fluid slides from the leading edge toward the blade tip instead of toward the blade upper surface is likely to occur. . This outflow causes a leading edge stall state in which lift cannot be generated by reducing the flow of fluid that should be directed from the leading edge to the trailing edge on the blade upper surface. In order to avoid this, as a fourth aspect of the present invention, in any one of the first aspect to the third aspect of the present invention, the blade is fluidized at the leading edge of the airfoil. It is good also as a structure provided with the dogtooth shape as a fluid vortex generating mechanism for generating a vortex. That is, for example, as shown in FIG. 9B, the leading edge of the wing has a jagged shape so-called dogtooth shape. This is another aspect of the so-called vortex generator. Dogtooth has a function of blocking outflow and a function of stabilizing a flow that is extremely diverted to the blade tip side on the blade upper surface by generating a strong belt-like turbulent flow on the blade upper surface.

<Effect of suppressing lift reduction due to wing tip vortex effect by winglet>
In general, at the blade tip, as shown in FIG. 10, for example, a fluid vortex from the blade lower surface on the pressure side is generated on the blade upper surface on the negative pressure side. This vortex is called a tip vortex and is known to cause a reduction in lift at the tip. In view of this, as a fifth aspect of the present invention, in any one of the first aspect to the fourth aspect of the present invention, the blade has a blade tip formed by a fluid on the blade tip of the airfoil. It is good also as a structure provided with the planar or three-dimensional winglet as a wing tip vortex prevention mechanism for preventing a vortex. Alternatively, as a sixth aspect of the present invention, in any one of the first aspect to the fourth aspect of the present invention, the blade uses a tip vortex by a fluid at a tip of the airfoil. It is good also as a structure provided with the winglet of the three-dimensional shape as a blade tip vortex utilization mechanism for doing. That is, a so-called winglet is installed at the blade tip as a means for suppressing a reduction in lift due to the influence of the blade tip vortex. In general, there are the following types of winglets.
a) Type that prevents the wing tip vortex from wrapping around by providing a shielding plate at the blade tip b) Type c) that reduces the pressure difference itself by giving a shape such as rounding or narrowing the shape of the blade tip A type combining type d) b) and c) that changes the vector of the lift force by bending the shape of the wing tip in the direction of the wing upper surface or the lower surface of the wing to prevent the reduction of the lift of the main wing part

  Here, it is considered that some birds and the like reduce the influence of the wing tip vortex by increasing the wing tip spacing. This not only prevents the reduction of lift, but also reduces wind noise. Based on these considerations, for example, FIG. 11 shows an example of a winglet form that the present inventor considered to be applicable to the present invention. Although it takes more time and effort to form such a shape at the time of blade molding, etc., it is possible to prevent a decrease in lift by suppressing the generation of wing tip vortices, so further improvement in efficiency can be achieved. Is possible. In addition, a wind noise reduction effect can be expected.

<Effect of obtaining propulsive force using accelerated airflow and tip vortex>
Unlike conventional vertical axis turbines, in a vertical axis logarithmic spiral turbine, the constrained vortex and the air flow itself have a characteristic of accelerating the blade tip side, i.e., backward in the direction of rotation, so that the air flow is It is thought that. In addition to bending the blade tip shape to the rotating shaft side, the swept angle is further increased so that the airflow flows backward, for example, by narrowing the blade tip as shown in FIG. It is possible to actively incorporate and convert to thrust.

<Effect of using a wing shape for the arm and making it a secondary wing>
In the vertical shaft type spiral turbine, each blade is connected to the rotating shaft body by an arm portion. However, since the arm portion also rotates and receives the fluid, the cross section of the arm portion is made an airfoil to reduce frictional drag. This will increase the energy conversion efficiency. Accordingly, as a seventh aspect of the present invention, in any one of the first aspect to the sixth aspect of the present invention, the cross section of the arm portion forms a wing shape, and the arm portion is vertical. The direction may be formed in a spiral or logarithmic spiral. For example, as shown in FIG. 13, it is preferable that the arm portion has a logarithmic spiral shape or a spiral shape like the blade. By doing so, it is possible to further improve the efficiency by giving a secondary wing effect to the main blade and generating a rotational moment by lift and drag from this arm portion.

<Effects of connecting and installing vertical shaft type spiral turbine>
As an eighth aspect of the present invention, in any one of the first aspect to the seventh aspect of the present invention, a tandem type vertical axis type connected in a plurality of stages in the axial direction of the rotary shaft body It may be a spiral turbine. In this case, a combination of a die (A type) in which the blade rotation radius decreases in a logarithmic spiral toward the lower portion and a die (B type) in which the blade rotation radius increases in a logarithmic spiral toward the lower portion is, for example, FIG. As shown in FIGS. 18C and 18D, various combinations such as A + A, A + B, B + A, and B + B are possible, but it is desirable to select a suitable combination depending on conditions such as the installation location and the season. Since these increase the total wind receiving area with a small installation area, it becomes possible to obtain larger kinetic energy.

<Effect of reducing blade turning radius toward bottom>
As a ninth aspect of the present invention, in any one of the first aspect to the seventh aspect of the present invention, a part or all of the turning radius of the blade is directed vertically downward. It is good also as a structure formed so that it might reduce to a logarithmic spiral. If the blade tip is formed to be on the upper side of the vertical axis spiral turbine, the kinetic energy of the rising component of the air current can be linked to the increase in the number of rotations. When it is installed in a place where the rising component of the airflow increases, such as on a ridgeline, it becomes possible to obtain larger kinetic energy.

<Effect of increasing the turning radius of the blade toward the bottom>
As a tenth aspect of the present invention, in any one aspect from the first aspect to the seventh aspect of the present invention, a part or all of the turning radius of the blade is longitudinally directed downward. It is good also as a structure formed so that it might increase in a logarithmic spiral. When the blade tip is formed at the lower part of the turbine as described above, the blade receives the kinetic energy of the descending component of the air flow, rainfall, and snowfall, which can increase the rotational speed. Therefore, it is possible to obtain larger kinetic energy when installed in a place where the descending component of the airflow increases, such as under a high-rise building, or in an area where there is a lot of rainfall or snowfall.

<Effect of being able to turn the direction of vertical axis spiral turbine upside down>
As an eleventh aspect of the present invention, in any one of the first to seventh aspects of the present invention, it is possible to change the vertical axis type spiral turbine upside down. It is good also as a structure further provided with the mechanism. As described above, in the vertical axis type spiral turbine, either the blade tip side is set to be the upper part of the turbine or the lower part is more suitable depending on conditions such as the installation place and the season. These conditions may change. Therefore, a more suitable rotational efficiency can be obtained by adopting a mechanism that can change the top and bottom of the logarithmic spiral turbine corresponding to these conditions.

<Advantages of constant chord length>
As a twelfth aspect of the present invention, in any one of the first aspect to the eleventh aspect of the present invention, the blade may have a constant width. Making the chord length constant has an advantage that it is easy to form when a blade having a logarithmic spiral shape and a three-dimensional rotation radius is formed. Even if it is easy to form, since the blade has a logarithmic spiral shape, as described above, it is possible to obtain better rotational efficiency than the conventional vertical axis spiral turbine.

<Advantages of increasing both chord length, chord center, and rotating shaft>
As a thirteenth aspect of the present invention, in any one of the first aspect to the eleventh aspect of the present invention, an interval between the rotary shaft body and the center of the chord length related to the blade is It is good also as a structure formed so that the said chord length may also increase according to the logarithmic spiral shape increasing from the blade root side of the said rotating shaft body to the blade end side. When the distance between the rotating shaft body and the center of the chord length increases in a logarithmic spiral, it is natural to increase the chord length at the same time and maintain the solidity, and there is an advantage that it is easy to form a blade. In the case of this shape, the area of the blade is slightly enlarged, and it is easy to obtain torque, which is advantageous for the initial movement in a weak wind.

<Advantages of reducing chord length while increasing the distance between the chord center and the rotating shaft>
As a fourteenth aspect of the present invention, in any one of the first aspect to the eleventh aspect of the present invention, an interval between the rotating shaft body and the center of the chord related to the blade is The chord length may be formed so as to decrease on the contrary while expanding in a logarithmic spiral shape from the blade tip side to the blade root side of the rotating shaft body. While the distance between the rotating shaft body and the center of the chord increases in a logarithmic spiral shape, reducing the chord length on the contrary has a demerit that it is difficult to form a blade. However, since the space between the rotating shaft and the center of the chord increases and the area of the blade decreases as the peripheral speed increases, the effect of being connected to better rotational efficiency can be obtained.

<Use of Magnus effect>
As a fifteenth aspect of the present invention, the vertical axis spiral turbine shown in any one of the first aspect to the fourteenth aspect of the present invention and the vertical axis spiral turbine are arranged on the same circumference. An integral frame that can be disposed on the frame, a rotating shaft of the integral frame, and a track groove that supports an outer peripheral leg portion of the integral frame and that can rotate. You may implement | achieve this invention as a vertical axis | shaft type spiral turbine assembly which has the structure formed so that the rotation direction of this and the rotation direction of the said vertical axis spiral turbine may become the same.

It is known that a rotating cylinder or a truncated cone in a uniform flow generates a lifting force perpendicular to the moving direction or the uniform flow. This is called the Magnus effect. In the vertical axis spiral turbine as well, since the shape of the entire turbine when the blades are rotating is a cylindrical shape, the Magnus effect also acts on the blades and the turbine itself. The vertical axis turbine does not have a high center of gravity unlike the horizontal axis turbine, and the wind pressure is applied to the entire turbine, which is advantageous in terms of safety in strong winds. When it is in an environment where it blows for a certain period of time, a strong pressure is applied to the entire turbine or arms by this Magnus effect.

  As an installation method for protecting the turbine from such a strong wind pressure and converting the lift caused by the Magnus effect into rotational energy, for example, a plurality of vertical axis spiral turbines as shown in FIG. 19 can be arranged on the same circumference. A plurality of vertical-shaft spiral turbines are installed with an integral frame, a rotation axis of the integral frame, and a raceway groove that supports the outer peripheral leg of the integral frame and that can rotate. There is.

  When the individual vertical-axis spiral turbines are installed so as to rotate clockwise, the rotation of the integral frame also works clockwise due to the Magnus effect. By this mechanism, the integrated frame can be made more robust than the frame of a single vertical shaft spiral turbine, and the pressure on the rotating shaft due to the strong Magnus effect in strong winds can also be converted into rotational motion. Safety can be achieved. The rotational energy obtained here can be used after being converted into electric power or the like in the same manner as the rotation of each vertical axis spiral turbine.

  The vertical axis spiral turbine according to the present invention can further improve the utilization efficiency of wind energy and the like by further increasing the rotational moment due to the lift / drag generated by each blade, and can easily and reliably self-start. Become.

It is a figure showing a schematic structure of a vertical axis type spiral turbine concerning one embodiment of the present invention. It is a figure which shows the schematic front structure of the braid | blade of the vertical axis | shaft spiral turbine shown in FIG. FIG. 2 is a diagram illustrating a schematic plan configuration of blades of the vertical axis spiral turbine illustrated in FIG. 1. It is a figure which shows the flow of the wind which passes the braid | blade in a helical turbine (conventional type). It is a figure which shows the flow of the wind which passes along the braid | blade in the vertical axis type | mold versus spiral turbine which concerns on one Embodiment of this invention. It is a figure which shows the modification of the basic shape which concerns on one Embodiment of this invention. It is a figure which shows another modification of the basic shape which concerns on one Embodiment of this invention. It is a figure which shows another modification of the basic shape which concerns on one Embodiment of this invention. It is a figure of a synthesis example with the helical turbine etc. which concern on one Embodiment of this invention. It is a figure which shows the effect by introduction of the slit which concerns on one Embodiment of this invention. It is the figure which showed various variation examples (type | mold) of what is called a vortex generator arrange | positioned on the blade surface which concerns on one Embodiment of this invention. It is a figure which shows the state which installed the wedge-shaped convex vortex generator in the blade surface which concerns on one Embodiment of this invention. It is the figure which showed a mode that the outflow generate | occur | produced in the braid | blade side front edge which concerns on one Embodiment of this invention. It is a figure which shows the state which gave what is called a dogtooth shape to the braid | blade side front edge which concerns on one Embodiment of this invention. It is a figure which shows the generation | occurrence | production state of the blade tip vortex concerning one Embodiment of this invention. It is a figure which shows the example (type | mold) of some winglets which suppress the lift fall which concerns on one Embodiment of this invention. It is a figure which shows the example of the winglet which obtains a thrust using the accelerated airflow and blade tip vortex which concern on one Embodiment of this invention. It is a figure which shows the example which made the arm part which concerns on one Embodiment of this invention into a subwing. It is a figure which shows schematic structure of the vertical axis | shaft spiral turbine which concerns on another embodiment of this invention. It is a figure which shows the airfoil cross section of the vertical axis | shaft spiral turbine which concerns on another embodiment of this invention. It is a figure which shows what is called a winglet of the vertical axis | shaft type spiral turbine which concerns on another embodiment of this invention. FIG. 6 is a view showing another so-called winglet of a vertical axis spiral turbine according to still another embodiment of the present invention. It is a figure which shows the state made into what is called a tandem structure, and the path | route of an air flow based on another embodiment of this invention. (A + A type) It is a figure which shows the state made into what is called a tandem structure, and the path | route of an air flow based on another embodiment of this invention. (B + B type) It is a figure which shows the state made into what is called a tandem structure, and the path | route of an air flow based on another embodiment of this invention. (A + B type) It is a figure which shows the state made into what is called a tandem structure, and the path | route of an air flow based on another embodiment of this invention. (B + A type) It is a figure which shows the structure built into the integral-type flame | frame using a Magnus effect based on another embodiment of this invention.

  Hereinafter, a vertical axis spiral turbine according to an embodiment of the present invention will be described with reference to the drawings. Below, the range required for the description for achieving the object of the present invention is schematically shown, and the range will be mainly described, and the description will be omitted according to known techniques.

<First Embodiment: Basic Shape of Blade>
FIG. 1 is a perspective view showing a schematic configuration of a vertical axis spiral turbine according to a first embodiment of the present invention. FIG. 2 is a schematic front view of the blade portion, and FIG. 3 is a schematic plan view. As shown in FIG. 1, a vertical shaft type spiral turbine 1 </ b> A according to an embodiment of the present invention is configured by attaching three blades 20 to a rotating shaft body 11 by arm portions 30. Of these configurations, the blade 20 has a cross-section (hereinafter, also referred to as a “cross-section”) that is substantially orthogonal to the extending direction thereof, as shown in FIGS. These cross sections are formed so as to be laminated in a vertical direction (stretching direction) or to be configured in an integrated manner. Each blade 20 has a cross section (hereinafter also referred to as a “longitudinal section”) in the vertical direction (stretching direction), as shown in FIG. 2, from the upper blade tip 91 toward the lower blade root 92. For example, as shown in FIG. 3, the horizontal distance from the rotating shaft body 11 is formed to decrease in a logarithmic spiral.

  The operation and operation of the vertical axis spiral turbine 1A having the above-described configuration will be described. In FIG. 1, when a fluid such as wind flows from a direction orthogonal to the rotation axis 10 and each blade 20 is pressed by the fluid, a line segment formed by the center line of the longitudinal section is formed in a spiral shape. Therefore, any part of the blade 20 surface is always in an optimal position and generates torque for starting the initial rotation. Further, since the blade 20 is formed by a logarithmic spiral line segment formed by the center line of the longitudinal section, the blade 20 has an effect of expanding the area per blade as compared with the conventional helical turbine. You will get more energy from the wind. As a result, it is possible to increase torque during rotation, that is, increase rotation speed.

  As described above, according to the first embodiment of the present application, a plurality of (for example, three) blades 20 are evenly arranged around the rotary shaft body 11, and the rotary shaft 10 is arranged from the blade tip to the blade root of each blade. Since the central longitudinal section is formed in a substantially logarithmic spiral shape, it is possible to generate a larger lift / torque and realize an increase in the number of rotations.

<Second Embodiment: Components of Blade: Introduction of Slit>
Hereinafter, in the second and subsequent embodiments and the corresponding drawings, the same functions as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. FIG. 14 is a diagram showing a schematic configuration of a vertical axis spiral turbine according to the second embodiment of the present invention, and FIG. 15 is a diagram showing a blade profile of the blade. In the vertical axis logarithmic spiral turbine 2A according to the second embodiment of the present invention, as shown in FIG. 14, each blade 20A has a plurality of sub-blades (blade configurations) so as to have a plurality of slits 41 and. Element) 21, 22, and 23. As shown in FIG. 7, these sub-blades are configured so that the airfoil shape of each sub-blade has a slight overlap, that is, the airfoil-shaped or teardrop-shaped tip in the cross section of the sub-blade 21 The arcuate end of the sub-blade 22 having a similar shape is slightly overlapped in front view, and the wing-shaped or teardrop-shaped apex in the cross section of the sub-blade 22 and the arc-shaped end of the sub-blade 23 having the same shape Are formed so as to have a slight overlap in front view. By being configured in this way, the fluid can smoothly pass through the slit. In the above description, an example in which one blade has three sub-blades has been described. However, the number of sub-blades is not limited to three, and any natural number can be used. In that case, the number of slits is (number of sub-blades) -1.

  According to the second embodiment of the present invention, since the slits 41 and 42 are provided, fluid such as wind flows from the direction (substantially) perpendicular to the rotation shaft 10 and each blade 20B is pushed from the fluid. When the pressure is applied, as shown in FIG. 7, the fluid (for example, wind) is removed from the slit, so that the separation of the fluid (for example, wind) from the blade is delayed and the flow velocity of the wind is increased. It becomes possible to make it. As a result, it is possible to avoid the so-called stall condition that occurs due to the wind condition in the vertical shaft type spiral turbine, and to stably convert the wind energy into the rotational speed.

<Third Embodiment: Another Component of Blade: Arrangement of Vortex Generator>
As a vertical axis spiral turbine according to the third embodiment of the present invention, in addition to the configuration of the first or second embodiment described above, a plurality of small wedge-shaped protrusions are formed on the surface of each blade 21 as shown in FIG. 8B. A vortex generator 50 of the type (FIG. 8A (a)) can also be arranged. Various shapes are possible as the shape of the vortex generator. For example, a plate-shaped convex mold 51 (FIG. 8A (b)), a vertical groove-shaped concave mold 52 along the blade width direction of the blade (FIG. 8A (c)). ), A horizontal groove-shaped concave mold 53 ((d) in FIG. 8A) or a plurality of small concave concave molds 54 ((e) in FIG. 8A) along the blade chord direction can also be employed. By providing a convex or concave vortex generator on the blade surface, a small vortex is generated when the fluid flows on the surface of each blade, and the separation of the fluid from the blade can be delayed. As a result, more lift can be generated from the wind energy, and an increase in torque can be linked to an increase in rotational speed.

<Fourth Embodiment: Another Component of Blade: Introduction of Dog Tooth Shape>
As a vertical axis type spiral turbine according to the fourth embodiment of the present invention, in addition to the configuration of any one of the first to third embodiments, as shown in FIG. A function of introducing a so-called dog tooth 503 having a jagged shape is adopted. This acts on the airflow when the blade rotates, interrupts the outflow 502 as shown in FIG. 9A, and generates a strip-like turbulent flow on the blade upper surface. By these actions, it is possible to have a function of stabilizing the flow that is extremely diverted to the blade tip side on the blade upper surface and stabilizing the lift.

<Fifth and Sixth Embodiments: Another Component of Blade: Introduction of Winglet>
FIGS. 16 and 17 show the vertical axis spiral turbine according to the fifth and sixth embodiments of the present invention, respectively, in addition to the configuration of any one of the first to fourth embodiments. FIG. 6 is a view showing a state where a portion functioning as a winglet is introduced at the blade tip of the blade. A winglet is a blade tip obtained by processing the blade tip of each blade into a shape / angle different from that of the other blade portions or attaching the different shape body. An outline of a vertical axis spiral turbine according to a fifth embodiment of the present invention is shown in FIG. In the fifth embodiment of the present invention, each blade is composed of sub blades and has slits as in the second embodiment, but a curved winglet 61 is introduced at the blade tip of each blade. Yes. By having such a structure with winglets, it acts on the airflow when the blade rotates, generating wing tip vortices, thereby suppressing the reduction of lift and reducing the air resistance (induced drag) It becomes possible to have.

  In the vertical axis spiral turbine according to the sixth embodiment of the present invention, as shown in FIG. 17, a tapered shape 62 is given to the blade tip portion of each blade 20. Thus, by providing the blade tip blade function equivalent portion at the blade tip of each blade, it is possible to have an effect of suppressing the generation of blade tip (blade end) vortices. As shown in FIG. 11 (a) to FIG. 11 (l), the shape of the blade tip wing can be various types such as narrowing the tip, rounding the tip, or subdividing the tip. In the case of FIG. 17, a winglet 62 having a three-dimensional curve is introduced at the blade tip of each blade. This winglet 62 acts on the airflow when the blade rotates, and as shown in FIG. 12, the blade tip vortex 404 and the increased blade surface flow 500 are combined to propel the blade in the traveling direction. It becomes possible to have a function of creating a force (drag) 501. As a result, more torque can be generated from the wind energy, and an increase in the rotational speed can be realized.

  Such a winglet is preferably introduced in a shape that tapers while retreating inward and backward in the rotational direction with respect to the wing as shown in FIG.

<Seventh Embodiment: Components of Vertical Axis Type Spiral Turbine: Sub-wing of Arm Part>
FIG. 13 is a conceptual perspective view showing the shape of an arm portion for connecting each blade to a rotating shaft according to the seventh embodiment of the present invention. In the vertical axis spiral turbine according to the seventh embodiment of the present invention, in addition to the configuration of any one of the first to sixth embodiments, as shown in FIG. Like the blades, the arm portion 30B that connects to the rotation shaft has a spiral shape or a logarithmic spiral shape, and this portion also has a wing-shaped cross section so that lift and drag can be utilized as a rotational moment. With this configuration, the arm 30B can enjoy the actions and effects of the blade having a logarithmic spiral shape, and the arm portion can have a sub-wing function. Therefore, for example, if the first or second embodiment in which each of the blades described above is formed in a logarithmic spiral and the seventh embodiment are used in a superimposed manner, the two together combine to further increase the energy of the wind. The effect can be increased.

  The first or second embodiment of the present invention described above is the third embodiment and / or the fourth embodiment, and / or the fifth embodiment or the sixth embodiment, and / or the first embodiment, respectively. The embodiment can be combined with the seventh embodiment. By combining these, the effects of the respective embodiments described above are produced in a superimposed manner. Incidentally, FIG. 13 shows a third embodiment in which a longitudinal groove-shaped concave vortex generator in the blade width direction is provided on the basis of the second embodiment, a fifth embodiment which is a winglet 61 using a blade tip vortex, and The arm portion 30B according to the seventh embodiment is combined with the sub wing. By combining these configurations, it can be expected that torque is stably generated from wind energy and the rotational speed is further increased.

<Eighth Embodiment: Effects of Linked Installation of Logarithmic Spiral Turbine>
FIGS. 18A, 18B, 18C, and 18D are diagrams showing the connection installation of the logarithmic spiral turbine according to the eighth embodiment of the present invention. The unit of the vertical axis logarithmic spiral turbine having the configuration of any one of the first to seventh embodiments may have a so-called tandem structure in which the rotation directions are the same and a plurality of units are combined and connected to the same shaft. . In this case, a combination of a mold (A type) in which the rotational radius of each blade decreases toward the lower part and a mold (B type) that increases toward the lower part is shown in FIGS. 18A, 18B, 18C, and 18D. As shown, various combinations such as A + A, A + B, B + A, and B + B are possible, but it is desirable to select a suitable combination depending on conditions such as installation location and season. Moreover, it is good also as what is called a stack structure which does not connect with the same axis | shaft but is piled up on the same vertical-axis position as what was integrated with energy conversion units, such as a generator, as one output module. If these stack structures are adopted, the total wind receiving area is increased with a small installation area, which leads to a larger kinetic energy. This stack structure is an effective method unique to vertical axis turbines. In these various combinations, the fluid flow is inclined in the direction of the blade tip. Therefore, when stacking the blade tip and the blade tip facing each other on the top and bottom, the distance is widened and a clearance 602 is provided. It is preferable to form a stack structure by taking into account the mutual flow interference. Conversely, when stacking the blade roots facing each other on the top and bottom, there is no need to increase the distance between them, so there is no problem even with a completely integrated structure.

<Vertical and logarithmic spiral turbine vertical and rotating direction>
The vertical axis logarithmic spiral turbine takes a shape in which the blade tip retreats and expands, but even if it is installed so that the blade tip is on the upper side of the turbine, the blade tip is changed to the lower side of the turbine by changing the top and bottom. You may install as follows. The turbine may be rotated clockwise or counterclockwise, but each blade cross section is preferably an airfoil cross section that can obtain the maximum benefit with respect to the flow of fluid such as wind.

<Effects of differences in top and bottom>
By the way, as a result of further study by the present inventor, it has been found that there are suitable installation conditions in the direction of the vertical axis logarithmic spiral turbine. According to the ninth embodiment of the present invention, in addition to the configuration of any one of the first to seventh embodiments, a part or all of the rotation radius of each blade decreases in the vertical direction. Ru is formed as. In the case of this configuration, that is, when the blade tip is installed on the upper side of the turbine, the kinetic energy of the rising component of the air current can be connected to the increase in the number of rotations. It can be said that it is suitable when it is installed in a place where the rising component of the airflow increases, such as on a ridgeline.

  On the other hand, according to the tenth embodiment of the present invention, in addition to the configuration of any one of the first to seventh embodiments, a part or all of the rotation radius of each blade is in the vertical direction. Form to increase. In the case of this configuration, that is, when the blade tip is installed at the lower part of the turbine, the descending component of the air current, the kinetic energy of rainfall and snowfall can also be linked to the increase in the number of revolutions, so Thus, it is suitable for installation in a place where the descending component of the airflow increases, or in an area where there is a lot of rainfall or snowfall.

  In this way, in the vertical axis logarithmic spiral turbine, either the blade tip side is set to be the upper part of the turbine or the lower part is more suitable depending on the conditions such as the installation location and the season. These conditions can be said to change. In view of this point, as the eleventh embodiment of the present invention, in addition to the configuration of any one of the first to seventh embodiments, the vertical axis logarithmic spiral turbine is oriented vertically (top and bottom). It is good also as a structure further provided with the mechanism which can be changed to reverse. By providing this mechanism, it becomes possible to obtain more suitable rotation efficiency in accordance with changes in conditions such as seasons. As the mechanism, for example, the method of fixing the turbine part composed of a plurality of blades to the rotating shaft is screwed, the screw is removed, the turbine part is taken out, the direction of the top and bottom is reversed, and the turbine part is rotated again. Although a mechanism such as fixing to a shaft can be employed, the present invention is not limited to this mechanism, and various known mechanisms can be employed.

<Difference and advantage of chord length change in logarithmic spiral turbine>
There are three patterns of how the width of the blade portion 20 which is an important component of the logarithmic spiral turbine is to be set in the vertical direction. As a twelfth embodiment of the present invention, in addition to the configuration of any one of the first to eleventh embodiments described above, in the case where the blade chord length is constant, It is easy to produce by keeping one of the items constant. On the other hand, as a thirteenth embodiment of the present invention, in addition to the configuration of any one of the first to eleventh embodiments, the distance between the rotary shaft body and the center of the chord of each blade is In the same way as increasing in a logarithmic spiral from the root of the rotating shaft to the tip of the blade, each chord length is also increased at the same ratio, so that the solidity is constant. Therefore, it can be said that there is an advantage that manufacturing is easy in a sense different from the above case, that is, manufacturing cost can be suppressed. Since the solidity of the entire blade is slightly enlarged, the torque is increased and initial startup is facilitated. Furthermore, as a fourteenth embodiment of the present invention, in addition to the configuration of any one of the first to eleventh embodiments described above, the interval between the rotating shaft body and the chord center of each blade is set to the rotating shaft. In contrast to the case described above, the degree of reduction is different in the case of a configuration in which each chord length is decreased while the number increases in a logarithmic spiral shape from the blade root to the tip of the body. Since it needs to be adjusted delicately, it is thought that the cost will increase in terms of design and production. However, since the solidity of the entire blade, particularly the solidity on the blade tip side where the peripheral speed is high, is reduced, the effect of increasing the speed during high-speed rotation can be expected. Both can be designed according to the installation environment.

<Use of Magnus effect>
It is known that a force (lift) perpendicular to the moving direction or the uniform flow is generated in the rotating sphere or cylinder in the uniform flow, and the cone / frustum. This is called the Magnus effect. Even in the case of a vertical axis type spiral turbine, the shape of the entire turbine when each blade is rotating is a cylindrical shape, so that the Magnus effect works not only on the blade but also on the turbine itself. Become. The vertical axis turbine does not have a high center of gravity unlike the horizontal axis turbine, and the wind pressure is uniformly applied to the entire turbine, so it is advantageous in terms of safety even in strong winds, but from the same direction. When there is an environment in which strong winds blow for a certain period of time, strong pressure is applied to the entire turbine or the shaft due to the Magnus effect.

  FIG. 19 shows a fifteenth embodiment of the present invention in which the turbine is protected from such a strong wind pressure and the lift due to the Magnus effect is also converted into rotational energy. As shown in the figure, in the fifteenth embodiment of the present invention, in addition to the configuration of any one of the first to fourteenth embodiments described above, a plurality of vertical axis spiral turbines are arranged on the same circumference. An integral frame 70 that can be placed on top, a rotation shaft 71 of the integral frame, and a track groove 72 that supports the outer peripheral leg portion of the integral frame and that can rotate, and a plurality of vertical frames. An axial spiral turbine or vertical axis spiral turbine assembly is installed.

  When the rotations 80 of the individual vertical axis type spiral turbines are installed in the clockwise direction, the rotation 81 of the integral frame also works in the clockwise direction due to the Magnus effect. With this mechanism, the integrated frame can be made more robust than the frame of a single vertical-shaft spiral turbine, and it is safe by converting the pressure on the rotating shaft due to the strong Magnus effect in strong winds into rotational motion. Sex can be achieved. The rotational energy obtained here can be used after being converted into electric power or the like in the same manner as the rotation of each vertical axis spiral turbine. The rotation of each vertical shaft type spiral turbine may transmit power to the central rotating shaft by a belt drive or the like. Further, the rotational energy of the integrated frame may not be transmitted from the central rotating shaft, but may be transmitted from the outer peripheral leg moving in the raceway groove.

  The vertical axis spiral turbine according to the present invention has been described above. However, the vertical axis spiral turbine according to the present invention is not limited to each embodiment, and can be appropriately modified, expanded, and modified without changing the gist of the present invention. The present invention can be carried out in a reduced or partially substituted manner, all of which are within the scope of the technical idea of the present invention. For example, the number of blades and the number of sub-blades constituting each blade are not limited. Of course, the vertical axis spiral turbine according to the present invention is not limited to the one that rotates with the kinetic energy of the gas, and may be one that rotates with the kinetic energy of the fluid (for example, water).

  Since the vertical axis spiral turbine according to the present invention can achieve the effects as described in detail above, the present invention has economic value and applicability in various industries including the electric construction industry. is there.

1A, 2A Vertical shaft type spiral turbine 10 Rotating shaft 11, 11B Rotating shaft body 12 Rotating direction 20 Blade 20B Blade (with slit)
20C blade variation 20D blade variation 20E blade variation 20F blade synthesis with helical turbine (partly logarithmic spiral)
21 First sub blade 22 Second sub blade 23 Third sub blade 30 Arm 30B Arm (spiral or logarithmic spiral)
30C Arm (diagonal straight)
41 First slit 42 Second slit 50 Vortex generator (wedge-shaped convex)
51 Vortex generator (plate-shaped convex type)
52 Vortex Generator (Vertical Groove Concave Type)
53 Vortex generator (horizontal groove concave)
54 Vortex generator (concave concave)
60 Winglet (cracked tip)
61 Winglet (Bend tip)
62 Winglet (Three-dimensional bend type)
63 Winglet (round tip)
70 Integral frame 71 Rotating shaft 72 of the integral frame Rotating track groove 80 of the integral frame Rotating direction of the vertical axis spiral turbine 81 Rotating direction of the integral frame 90 Blade width 91 Blade tip 92 Blade root θB Retraction angle θ Expansion Angle 100 Large rotating diameter of turbine (blade tip rotation trajectory)
101 Small rotation diameter of turbine (rotation locus of blade root)
102 Leading edge 103 Trailing edge 104 Blade upper surface 105 Blade lower surface 106 Blade chord 201 Flow through blade of helical turbine 202 Tip radius of rotation 203 Wind flow through blade of vertical axis spiral turbine 204 Occurs due to difference in peripheral speed Secondary flow due to pressure difference 205 Turning radius of blade root (less than 202)
301 Reduction of frictional drag 302 Delay of separation 303 Increase of flow velocity 304 Helical turbine part e
401 Direction in which lift acts 402 Flow of wraparound from the pressure side to the suction side 403 Wind flow flowing through the blade blade tip 404 Blade tip vortex 500 Restraint vortex 501 Propulsive force (drag)
502 Outflow 503 Dogtooth shape 601 Airflow 602 Clearance in tandem structure

Claims (15)

A rotating shaft body;
In at least a part of the section from the blade root, which is arranged around the rotary shaft body, to the blade tip, which is the end portion closer to the rotary shaft body, to the blade tip, which is the end portion far from the rotary shaft body. A blade formed so as to open, the blade having an airfoil in a cross-section that is a cross-section substantially orthogonal to the extending direction of the rotary shaft body, and a horizontal distance from the rotary shaft body in the cross-section is A blade formed to change in a logarithmic spiral along the axial direction of the rotating shaft;
A vertical shaft spiral turbine comprising an arm portion that connects the rotating shaft body and the blade.   The vertical axis spiral turbine according to claim 1, wherein the blade includes one or more slits formed in a direction of a blade width of the airfoil.   The vertical axis spiral turbine according to claim 1 or 2, wherein the blade includes a vortex generator as a fluid vortex generating mechanism for generating a fluid vortex on the surface of the airfoil.   4. The blade according to claim 1, wherein the blade has a dogtooth shape as a fluid vortex generating mechanism for generating a fluid vortex at a leading edge of the airfoil. 5. Vertical axis spiral turbine.   5. The blade according to claim 1, wherein the blade includes a flat or three-dimensional winglet as a tip vortex preventing mechanism for preventing a tip vortex caused by a fluid at a tip of the airfoil. The vertical axis spiral turbine according to claim 1.   The blade includes a winglet having a three-dimensional shape as a tip vortex utilization mechanism for utilizing a tip vortex by a fluid at a tip of the airfoil. The vertical axis spiral turbine according to claim 1.   The vertical section according to any one of claims 1 to 6, wherein a cross section of the arm portion forms an airfoil, and the arm portion is formed in a longitudinal spiral shape or a logarithmic spiral shape. Shaft type spiral turbine.   A tandem type vertical axis spiral turbine characterized in that the vertical axis type spiral turbine according to any one of claims 1 to 7 is connected in a plurality of stages in the axial direction of the rotary shaft body.   The vertical axis type spiral turbine according to any one of claims 1 to 7, wherein a rotation radius of a part or all of the blades is reduced in a vertical direction. Spiral turbine.   The vertical axis type spiral turbine according to any one of claims 1 to 7, wherein a rotation radius of a part or all of the blades increases in a vertical direction. Spiral turbine.   8. The vertical axis spiral turbine according to claim 1, further comprising a mechanism capable of changing the vertical direction to the reverse direction. . The claims in the vertical axis type helical turbine according to any one of items 1 to 11, the vertical axis type helical turbine, wherein the length of the chord forming the airfoil is constant. The vertical axis spiral turbine according to any one of claims 1 to 11, wherein an interval between the rotating shaft body and a chord center of the blade is from a blade root side of the rotating shaft body to a blade tip. in expanding toward the side with a logarithmic spiral, vertical axis helical turbine, characterized in that the length of chord forming the airfoil is formed to expand. The vertical axis spiral turbine according to any one of claims 1 to 11, wherein an interval between the rotating shaft body and a chord center of the blade is from a blade root side of the rotating shaft body to a blade tip. in that increases toward the side with a logarithmic spiral, vertical axis helical turbine, characterized in that the length of the chord forming the airfoil is formed to reduce. The vertical axis spiral turbine according to any one of claims 1 to 14,
An integral frame that allows the vertical axis spiral turbine to be arranged on the same circumference;
A rotating shaft of the integral frame;
Supporting the outer circumferential legs of the integrated frame, and further comprising, to the direction of rotation of the vertical shaft type spiral turbine and the rotational direction of the integrated frame is the same and a raceway groove as rotation is possible A vertical axis spiral turbine assembly characterized by being formed into

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