JP4719221B2 - Magnus type wind power generator - Google Patents

Description

  The present invention relates to a Magnus type wind power generator that rotates a horizontal rotation shaft by a Magnus lift generated by the interaction between the rotation of each rotating cylinder and wind power to drive a power generation mechanism.

  An efficient wind power generator using a Savonius windmill has been put into practical use, but the blades of the Savonius windmill cannot rotate beyond the wind speed and the power generation capacity is small, so it is not suitable for large power generation. On the other hand, as a practical wind power generator having a relatively high power generation capability, there is one using a propeller type windmill, but there is a problem that the windmill efficiency cannot be increased in a relatively low wind speed region.

  In addition to these methods, a Magnus type wind power generator that generates power by generating Magnus lift in rotating cylinders arranged in a required number radially with respect to the horizontal rotating shaft and rotating the horizontal rotating shaft is already known ( For example, see Patent Documents 1 and 2).

U.S. Pat. No. 4,366,386 Russian Federation Patent No. 2189494C2 Specification

  The Magnus type wind power generator as shown in Patent Document 1 generates Magnus lift by rotating a rotating cylinder and generates power by rotating a horizontal rotating shaft. It is necessary to increase the Magnus lift by increasing the rotation speed of the cylinder. However, in order to rotate the rotating cylinder at high speed, a lot of energy is consumed and the power generation efficiency is deteriorated.

  Moreover, since the Magnus type wind power generator described in Patent Document 2 rotates the rotating cylinder using a Savonius rotor that is rotated by wind power, the transmission mechanism of the rotating cylinder can be omitted, and the rotating cylinder can be rotated. There is no need to provide a drive motor, but the Savonius rotor cannot rotate above the wind speed and cannot increase the rotational speed of the rotating cylinder, so it cannot generate large Magnus lift and is not suitable for efficient power generation. It becomes.

  The present invention solves such problems all at once, and provides a Magnus type wind power generator capable of generating power efficiently from a low wind speed region to a relatively high wind speed region.

In order to solve the above-described problem, a Magnus type wind power generator according to claim 1 of the present invention provides:
A horizontal rotating shaft that transmits rotational torque to the power generation mechanism and rotating cylinders arranged in a required number substantially radially from the horizontal rotating shaft, and each rotating cylinder rotates around the axis of the rotating cylinder; , A Magnus type wind power generator that drives the power generation mechanism section by rotating the horizontal rotation shaft by Magnus lift generated by the interaction between the rotation of each rotating cylinder and wind power,
A spiral strip formed in a convex shape or a concave shape is provided on at least a part of the outer circumferential surface of the rotating cylinder, and the flow of air that faces at least the axial direction of the rotating cylinder on the outer circumferential surface of the rotating cylinder by the spiral strip. And a cross-sectional shape of at least a portion of the spiral strip has a shape that reduces air resistance generated when rotating in a predetermined rotation direction around the axis of the rotating cylinder. It is characterized by that.
According to this feature, the spiral strip formed in a convex shape or a concave shape does not receive a large air resistance in each cross section, the rotational resistance around the axis of the rotating cylinder is reduced, and the rotating cylinder rotates more efficiently. . Further, based on the rotation of the rotating cylinder, the air flow in the axial direction of the rotating cylinder due to the spiral strip increases. Therefore, the Magnus lift generated by the interaction between the rotation of the rotating cylinder and the wind power is increased, and the power generation efficiency of the wind power generator is compared from the low wind speed range by increasing the rotational torque of the horizontal rotating shaft that drives the power generation mechanism. It can be dramatically increased over the high wind speed range. Note that it is only necessary that at least a part of the cross-sectional shape of the spiral strip reduces the air resistance, and it is not necessary that all the spiral strips reduce the air resistance.

The Magnus type wind power generator according to claim 2 of the present invention is the Magnus type wind power generator according to claim 1,
The spiral strip has at least a first surface and a second surface each having different air resistance with respect to a predetermined wind force, and the first surface has a lower air resistance than the second surface. The first surface and the second surface are characterized in that the spiral strip has an asymmetric shape in its cross-sectional shape.
According to this feature, the spiral strip is formed with respect to rotation in a predetermined rotation direction around the axis of the rotating cylinder by properly arranging (alternatingly arranging) the first surface and the second surface. When the natural wind is applied to the rotating cylinder from a predetermined direction, it is easy for the rotating cylinder to rotate in a predetermined rotating direction around the axis, and the natural wind is rotated to the rotating cylinder. Can be rotated. Furthermore, when rotating a rotating cylinder with the power of another drive motor, not only can this rotational power be reduced, but it is also possible to operate a self-rotating Magnus wind power generator that uses the drive motor as little as possible. It becomes. In addition, the 1st surface and 2nd surface which have different air resistance define the air resistance of each surface when the air of the same wind speed is applied to each surface.

The Magnus type wind power generator according to claim 3 of the present invention is the Magnus type wind power generator according to claim 2,
The spiral strip is characterized in that at least three or more strips are provided for one rotating cylinder.
According to this feature, by providing a plurality of spiral strips having three or more spiral strips, it is possible to flow more airflow in the axial direction of the rotating cylinder, and the spiral strips more efficiently generate natural wind power. The rotating cylinder smoothly rotates around the axis.

The Magnus type wind power generator according to claim 4 of the present invention is the Magnus type wind power generator according to claim 3,
The spiral stripes are provided at odd intervals at equal intervals in the sectional view of the rotating cylinder.
According to this feature, it is possible to always bring an unbalanced state to the spiral strip receiving natural wind force, and to further increase the self-rotating force of the rotating cylinder.

The Magnus type wind power generator according to claim 5 of the present invention is the Magnus type wind power generator according to any one of claims 2 to 4,
The rotating cylinder is composed of at least a circular arc surface and a convex spiral strip, and the first surface of the convex spiral strip has air from the arc surface of the rotating column to the first surface when the rotating cylinder rotates. The first surface extends close to the tangential direction of the arc surface so that the air resistance when flowing can be reduced.
According to this feature, since air is smoothly moved from the arc surface to the first surface, separation of the air flow on the rotating cylinder is suppressed, and the Magnus lift can be effectively maintained. In addition, the first surface of the convex spiral stripe also serves as an arc surface that generates lift, and an increase effect of Magnus lift can be expected. The above-mentioned “the first surface extends close to the tangential direction of the circular arc surface” means that the air flow from the upstream side in the rotational direction of the rotating cylinder is inclined so as not to receive a large resistance. Yes, it means an inclination that can be appropriately designed by those skilled in the art.

The Magnus type wind power generator according to claim 6 of the present invention is the Magnus type wind power generator according to claim 5,
An air disturbing portion is formed at the protruding end portion of the first surface of the convex spiral strip.
According to this feature, the air disturbing portion disturbs the surface layer flow of the air in the vicinity of the tip of the first surface of the convex spiral strip, so that a vortex is formed on the downstream side thereof, and the convex spiral strip rotates. A stable air flow returns to the arc surface of the rotating cylinder in a relatively short time, and Magnus lift is effectively generated.

The Magnus type wind power generator according to claim 7 of the present invention is the Magnus type wind power generator according to claim 5 or 6,
A concave portion is formed on the second surface of the convex spiral strip.
According to this feature, when the rotating cylinder rotates in a predetermined rotation direction around the axis, the second surface becomes the back surface of the convex spiral stripe, and the depression is formed here. When a negative pressure is generated in the negative pressure portion and an air flow is sucked into the negative pressure portion, the air is stabilized in a relatively short time on the circular arc surface of the rotating cylinder that continues downstream of the second surface along with the rotation of the convex spiral strip. The flow returns and the Magnus lift is effectively generated. In addition, by forming a recess in the second surface, it becomes possible to secure a large area of the arc surface that continues downstream of the second surface, and an effect of increasing Magnus lift can be expected.

A Magnus type wind power generator according to claim 8 of the present invention is the Magnus type wind power generator according to any one of claims 2 to 4,
The rotating cylinder is composed of at least an arc surface and a concave spiral strip, and the first surface of the concave spiral strip is air when air flows from the first surface to the arc surface of the rotating column when the rotating cylinder rotates. In order to reduce the resistance, the first surface extends close to the tangential direction of the arc surface.
According to this feature, since air is smoothly moved from the first surface to the arc surface, separation of the air flow on the rotating cylinder is suppressed, and the Magnus lift can be effectively maintained. In addition, the first surface of the concave spiral strip also serves as an arc surface that generates lift, and an increase effect of Magnus lift can be expected. The above-mentioned “the first surface extends close to the tangential direction of the circular arc surface” means that the air flow from the upstream side in the rotational direction of the rotating cylinder is inclined so as not to receive a large resistance. Yes, it means an inclination that can be appropriately designed by those skilled in the art.

The Magnus type wind power generator according to claim 9 of the present invention is the Magnus type wind power generator according to claim 8,
An air disturbance part is formed in the vicinity of the boundary between the second surface of the concave spiral strip and the arc surface of the rotating cylinder.
According to this feature, the air disturbance part disturbs the surface layer flow of the air near the boundary between the circular arc surface of the rotating cylinder and the second surface of the concave spiral strip, so that a vortex flow is formed on the downstream side thereof, and the concave spiral Along with the rotation of the strip, a stable air flow returns to the first surface of the concave spiral strip in a relatively short time, and Magnus lift is effectively generated.

A Magnus type wind power generator according to claim 10 of the present invention is the Magnus type wind power generator according to claim 8 or 9,
A concave portion is formed on the second surface of the concave spiral strip.
According to this feature, when the rotating cylinder rotates in a predetermined rotation direction around the axis, a depression is formed on the second surface, so that a negative pressure is generated in the depression and the negative pressure is reduced. When the air flow is sucked in, the air flow that is stable in a relatively short time returns to the first surface downstream of the second surface of the concave spiral strip along with the rotation of the concave spiral strip, and the Magnus lift is effective. Occurs. In addition, by forming a recess in the second surface, it becomes possible to secure a large area of the first surface that continues downstream of the second surface, and an effect of increasing Magnus lift can also be expected.

It is explanatory drawing of Magnus lift. 1 is a front view showing a Magnus type wind power generator in Example 1. FIG. It is a side view which shows the Magnus type wind power generator in Example 1. FIG. It is a front view which shows the rotating cylinder in which the spiral strip in Example 1 was provided. It is AA sectional drawing which shows the rotating cylinder in FIG. It is an expanded sectional view showing a spiral strip. It is a front view which shows the rotating cylinder in which the spiral strip in Example 2 was provided. It is BB sectional drawing which shows the rotating cylinder in FIG. It is a front view which shows the rotating cylinder in which the spiral strip in Example 3 was provided. It is a front view which shows the rotating cylinder in which the spiral strip in Example 4 was provided. It is a front view which shows the rotating cylinder in which the spiral strip in Example 5 was provided. It is a front view which shows the rotating cylinder in which the spiral strip in Example 6 was provided. It is a front view which shows the Magnus type wind power generator in Example 7. FIG. 10 is a side view showing a Magnus type wind power generator in Example 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnus type wind power generator 3 Electric power generation mechanism part 5 Rotor (horizontal rotating shaft)
7, 26, 29 Rotating cylinder 31, 33, 35 Rotating cylinder 7a, 26a Arc surface 8, 30, 32 Convex spiral strip 34, 36 Convex spiral strip 27 Concave spiral strip 8a, 27a Inclined surface (first surface)
30a, 32a Inclined surface (first surface)
34a, 36a Inclined surface (first surface)
8b, 27b Curved concave surface (second surface, indented portion)
30b, 32b Curved concave surface (second surface, indented portion)
34b, 36b Curved concave surface (second surface, indented portion)
10 Outer shaft (horizontal rotation axis)
15 Generator 18 Drive motor 25 Minute concave (air disturbance part)
28 Minute ridges (air disturbance part)

  The best mode for carrying out the Magnus type wind power generator according to the present invention will be described below based on the embodiments.

  A Magnus type wind power generator according to an embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is an explanatory diagram of Magnus lift, and FIG. 2 is a front view showing the Magnus type wind power generator according to the first embodiment. FIG. 3 is a side view showing the Magnus type wind power generator in Example 1, FIG. 4 is a front view showing a rotating cylinder provided with a spiral strip in Example 1, and FIG. It is AA sectional drawing which shows the rotating cylinder in FIG. 4, FIG. 6 is an expanded sectional view which shows a spiral strip. Hereinafter, the front side of FIG. 2 and FIG. 4 is the front side (front side) of the Magnus type wind power generator, and the right side of FIGS. 3, 5, and 6 is the front side (front side) of the Magnus type wind power generator. explain.

A general mechanism for generating Magnus lift will be described. As shown in the cross-sectional view of the rotating cylinder C having a cylindrical shape in FIG. 1, the flow of air hitting the rotating rotating cylinder C is as shown in FIG. In the rotation direction of C (counterclockwise) and the direction of the air flow N ₀ , the air flows upward along with the rotation of the rotating cylinder C. At this time, the air flowing on the upper side of the rotating cylinder C moves on the lower side of the rotating cylinder C. Since the air flows faster than the velocity of the flowing air, a Magnus effect that causes a difference in air pressure between the negative pressure on the upper side of the rotating cylinder C and the positive pressure on the lower side is generated. Magnus lift Y ₀ in the direction forming an ₀ and vertical is adapted to generate.

  Reference numeral 1 shown in FIGS. 2 and 3 is a Magnus type wind power generator to which the present invention is applied. The Magnus type wind power generator 1 is arranged in the horizontal direction on the upper part of the abutment 2 erected on the ground. The power generation mechanism 3 is pivotally supported so that the power generation mechanism 3 can be rotated in the horizontal direction by driving a vertical motor 4 disposed therein.

  As shown in FIGS. 2 and 3, on the front side of the power generation mechanism section 3, a rotating body 5 is disposed as a horizontal rotating shaft in the present embodiment in which the axis of rotation faces the horizontal direction. Referring to FIG. 2, 5 is pivotally supported so as to rotate clockwise in front view. A front fairing 6 is attached to the front side of the rotating body 5, and five substantially cylindrical rotating columns 7 are arranged radially on the outer periphery of the rotating body 5. Each rotating cylinder 7 is rotatably supported in a predetermined rotation direction around the axis of the rotating cylinder 7.

  Further, a convex spiral strip 8 formed in a spiral shape is integrally wound on the outer peripheral surface of the rotating cylinder 7, and the convex spiral strip 8 is formed on the outer peripheral surface of the rotating column 7. It is formed in a substantially convex shape so as to protrude from. In addition, the convex spiral strip 8 is provided on the surface of one rotating column 7 with three strips (odd strips). The convex spiral strip 8 can be made of a material such as a synthetic resin or a material such as a weather-resistant lightweight alloy.

  The convex spiral strip 8 will be described. As shown in FIG. 4, the convex spiral strip 8 that forms a triple helix having a required width and a required height is provided over the entire length of the rotating cylinder 7. When viewed from the front end side of the rotating cylinder 7, it is fixed so as to form a right-handed spiral having a right-hand thread shape. Further, the micro-groove 25 (wind window) as an air disturbing portion in the present embodiment is formed so as to extend along the projecting end portion of the convex spiral strip 8 and to be slightly recessed from the surface of the convex spiral strip 8. Lip) is provided.

  The rotation direction of the rotating cylinder 7 shown in FIG. 5 is counterclockwise, and the convex spiral strip 8 has a substantially fin shape in cross-sectional view so as to reduce air resistance generated when the rotating cylinder 7 rotates. It has become a shape. The cross-sectional shape of the convex spiral strip 8 is formed to be the same over the entire length of the convex spiral strip 8.

  Further, the convex spiral strip 8 is formed with an inclined surface 8a as the first surface in the present embodiment that is inclined in the direction opposite to the rotation direction of the rotating cylinder 7, and the inclined surface 8a of the convex spiral strip 8 is also formed. On the back side, there are formed a second surface and a curved concave surface 8b as a recess in the present embodiment formed so as to be recessed with a predetermined curvature on the inner side of the convex spiral strip 8. The inclined surface 8a of each convex spiral strip 8 faces the rotational direction side of the rotating column 7, and the curved concave surface 8b faces the direction opposite to the rotating direction of the rotating column 7, and the inclined surface 8a The curved concave surfaces 8b are arranged alternately and appropriately so as to be easily rotated in a predetermined direction of the rotating cylinder 7. A substantially concave minute groove 25 is formed in the vicinity of the protruding end of the inclined surface 8a.

  Further, as shown in FIG. 4, a disc-shaped end cap 9 having a diameter larger than the diameter of the rotating column 7 is attached to the tip surface of the rotating column 7, and on the outer side of the end cap 9. Is formed with a round surface 9a having a predetermined curvature.

  Further, as shown in FIG. 3, an outer shaft 10 as a horizontal rotation shaft in the present embodiment in which the longitudinal direction is in the horizontal direction is disposed inside the power generation mechanism portion 3, and the outer shaft 10 is configured as the power generation mechanism portion 3. It is supported so as to be rotatable in the vertical direction via a bearing 11 arranged inside. The shaft of the outer shaft 10 is penetrated, and the inner shaft 12 is inserted into the shaft of the outer shaft 10.

  The inner shaft 12 shown in FIG. 3 is pivotally supported by a bearing 13 disposed inside the outer shaft 10 so as to be rotatable in the vertical direction. The outer shaft 10 and the inner shaft 12 can be rotated independently of each other, so that the rotation directions may be the same and the rotation speed may be different, or the rotation may be performed even if the rotation directions are different. It has become.

  As shown in FIG. 3, a gear 14 is fixed to the rear end of the outer shaft 10, and this gear 14 is engaged with a gear 16 connected to a generator 15 in the power generation mechanism unit 3. Yes. A front end of the outer shaft 10 protrudes outward from the power generation mechanism unit 3, and the rotating body 5 is fixed to the front end of the outer shaft 10.

  As shown in FIG. 3, the rear end of the inner shaft 12 protrudes from the outer shaft 10, and a gear 17 is fixed, and this gear 17 is a gear that is interlocked with the drive motor 18 in the power generation mechanism section 3. 19 is engaged. Further, the front end of the inner shaft 12 protrudes from the outer shaft 10, and a large-diameter bevel gear 20 is fixed to the front end of the inner shaft 12.

  A one-way clutch 22 that transmits the rotational force of the drive motor 18 in one direction is disposed between the drive motor 18 and the gear 19 shown in FIG. 3, and the rotation of the gear 19 causes the drive motor 18 to rotate in the reverse direction. Even if force is applied, the one-way clutch 22 can prevent the drive motor 18 from rotating backward. Further, a battery 23 that stores power for starting the drive motor 18 is disposed inside the power generation mechanism unit 3. The vertical motor 4 and the drive motor 18 are controlled by an anemometer (not shown) for observing the wind direction and wind speed of the surrounding environment of the Magnus type wind power generator 1 and a control circuit 24 connected to an anemometer (not shown). It has become so.

  As shown in FIG. 2, the large-diameter bevel gear 20 fixed to the inner shaft 12 is disposed at the center of the front-side rotating body 5 fixed to the outer shaft 10, and the bevel gear 20 is disposed on the front side. It arrange | positions so that it may narrow toward it (so that the diameter of the front side may become smaller than the diameter of the back side). By arranging the bevel gear 20 in this way, the rotation direction of the bevel gear 20 and the rotation direction of the rotating body 5 can be reversed. Furthermore, five small-diameter bevel gears 21 are engaged with the large-diameter bevel gear 20, and the five small-diameter bevel gears 21 are arranged at the bases of the five rotating cylinders 7 arranged on the outer periphery of the rotating body 5. It is connected.

  When the drive motor 18 in the power generation mechanism 3 shown in FIG. 3 is driven, the power of the drive motor 18 is transmitted to the large-diameter bevel gear 20 via the inner shaft 12, and the five small-diameter gears engaged with the bevel gear 20 are engaged. The bevel gear 21 is rotated, and the five rotating cylinders 7 connected to each bevel gear 21 are rotated about the axis of the rotating cylinder 7.

  When power is generated using the Magnus type wind power generator 1, first, the wind direction is detected by an anemometer (not shown), and the control circuit 24 drives the vertical motor 4 so that the wind strikes from the front side of the rotating body 5. As described above, the power generation mechanism unit 3 is turned in accordance with the wind direction. Then, as shown in FIG. 3, the natural wind N comes into contact with the front side of the Magnus type wind power generator 1.

  And the electric power for starting stored in the battery 23 inside the electric power generation mechanism part 3 is supplied to the drive motor 18, and the drive motor 18 is driven. The power of the drive motor 18 is transmitted through the inner shaft 12 and the bevel gears 20 and 21, and each rotating cylinder 7 starts to rotate. Due to the Magnus lift Y generated by the interaction between the rotation of each rotating cylinder 7 and the wind force, the rotating cylinder 7 and the rotating body 5 are rotated about the outer shaft 10 as an axis.

  Referring to FIG. 5, the rotation direction of the rotating cylinder 7 and the winding method of the convex spiral strip 8 will be described in detail. When viewed from the front end side of the rotating cylinder 7, the winding method of the convex spiral strip 8 of the rotating cylinder 7. Is a right spiral with a right-hand thread shape, the rotation direction of the rotating cylinder 7 is counterclockwise. Since the winding direction of the convex spiral strip 8 is opposite to the rotation direction of the rotating cylinder 7, the air flowing on the outer peripheral surface of the rotating cylinder 7 is transferred to the rotating body 5 as shown in FIGS. 2 and 4. It can flow toward the direction of approach.

  As shown in FIG. 4, the convex spiral strip 8 is applied to the rotating column 7, whereby an air flow F is generated by the convex spiral strip 8 when the rotating column 7 rotates. At this time, on the outer peripheral surface of the rotating cylinder 7, apart from the natural air N or the movement of air on the surface of the rotating cylinder 7 that rotates together with the rotating cylinder 7, the air flow component V ( A vector component V) can be generated. As shown in FIG. 2, the air flow component V flows from the distal end side of the rotating cylinder 7 toward the rotating body 5.

  As shown in FIGS. 4 and 5, the air flow around the outer periphery of the rotating cylinder 7, that is, the air flow F is generated on the outer peripheral surface of the rotating cylinder 7, thereby rotating with the natural wind N and the rotating cylinder 7. A three-dimensional air flow formed by the air movement of the surface of the cylinder 7 is formed.

  Then, as shown in FIG. 5, the Magnus lift Y generated by the interaction between the rotation of each rotating cylinder 7 and the wind force is increased. The air flow F given by the convex spiral strip 8 here does not necessarily have to be directed in the axial direction of the rotating cylinder 7, and is sufficient if there is at least a vector component V parallel to the axis of the rotating cylinder 7. There is. As a reason for the increase of the Magnus lift Y, there is a phenomenon in which the differential pressure between the negative pressure and the positive pressure applied to the rotating cylinder 7 increases, a phenomenon in which the lift generation surface expands, and the like. it is conceivable that.

  Further, when the end cap 9 is used, the Magnus effect is improved. That is, by providing the end cap 9 on the tip surface of the rotating cylinder 7, the end cap 9 has a positive effect on the air flow F, and the Magnus lift Y is improved.

  Further, as shown in FIG. 5, the convex spiral strip 8 is provided at odd intervals (three strips in this embodiment) at equal intervals on the cross-sectional circumference of the rotary column 7, and therefore the rotary column 7 is around the axis. It can be rotated smoothly.

  The odd-numbered convex spiral strip 8 will be specifically described. For example, when the convex spiral strips 8 provided on the rotating cylinder 7 are provided at even intervals on the cross-sectional circumference of the rotating column 7, they are arranged at positions facing each other via the axis of the rotating column 7. There is a case where the natural wind N is evenly applied to each convex spiral strip 8 to balance the rotation of the rotating cylinder 7 and the rotation of the rotating cylinder 7 is stagnated.

  However, by providing the convex spiral strips 8 at odd intervals, the convex spiral strips 8 are not arranged at positions facing each other via the axis of the rotating cylinder 7. Since the natural wind N of wind is applied to 8 unevenly, the rotating cylinder 7 can always be in an unbalanced state, and the self-rotating force of the rotating cylinder 7 can be further increased.

  Note that the convex spiral strip 8 only needs to be provided in a plurality of strips of at least three or more with respect to one rotating cylinder 7, and in this way, a larger amount of air flow V is transmitted in the axial direction of the rotating cylinder 7. The convex spiral strip 8 can receive the natural wind force more efficiently, and the rotating cylinder 7 rotates smoothly around the axis.

  Further, in this embodiment, three convex spiral strips 8 are provided on the rotating cylinder 7, but the present invention is not limited to this, and the convex spiral strip 8 has five strips on the rotating cylinder 7. Seven or more odd-numbered convex spiral strips 8 may be provided on the rotating cylinder 7.

  Further, the convex spiral strip 8 will be described in detail with reference to FIG. 6. The convex spiral strip 8 has a different air resistance so that the inclined surface 8 a and the curved concave surface 8 b provided on the convex spiral strip 8 have different air resistances. 8 has an asymmetric shape in its cross-sectional shape. The inclined surface 8a of the convex spiral strip 8 has a predetermined surface on the arc surface 7a so that air resistance can be reduced when air flows from the arc surface 7a of the rotating column 7 to the inclined surface 8a when the rotating column 7 rotates. The air flow component K flowing through the circular arc surface 7 a can be smoothly flowed in a direction away from the axis of the rotating cylinder 7.

  The air flow component K flowing in the tangential direction of the circular arc surface 7a in the sectional view of the rotating cylinder 7 referred to here rotates the surface of the rotating cylinder 7 (arc surface 7a) when the rotating cylinder 7 is rotated. This is the flow of air that flows relative to the cylinder 7. The air flow component K is caused to flow away from the axis of the rotating cylinder 7 by the inclined surface 8a of the convex spiral strip 8, so that the air resistance (rotational drag) generated in the convex spiral strip 8 is reduced. It has become so. And since air moves smoothly from the circular arc surface 7a to the inclined surface 8a, separation of the air flow on the rotating cylinder 7 is suppressed, and the Magnus lift Y can be effectively maintained.

  Further, in this embodiment, the inclined surface 8a of the convex spiral strip 8 is inclined so as to extend close to the tangential direction at the position of the predetermined point α on the circular arc surface 7a of the rotating cylinder 7, The surface 8a does not necessarily have to be close to the tangential direction at the point α, and the slope of the inclination changes the air flow component K on the rotating cylinder 7 at an angle of a right angle or less in the direction away from the axis of the rotating cylinder 7. If it is the surface 8a, the air resistance which generate | occur | produces in the convex spiral strip 8 will be reduced.

  Further, the inclined surface 8a of the convex spiral strip 8 also serves as the circular arc surface 7a for generating lift, and an increase effect of the Magnus lift Y can be expected. The above-mentioned “the inclined surface 8 a extends close to the tangential direction at the position of the predetermined point α on the circular arc surface 7 a of the rotating cylinder 7” means the air flow from the upstream side in the rotating direction of the rotating cylinder 7. This means that K is an inclination that does not receive a large resistance, and means an inclination that can be appropriately designed by those skilled in the art.

  Further, as shown in FIG. 6, the curved concave surface 8 b of the convex spiral strip 8 is in a direction opposite to the rotational direction of the rotating column 7 rather than a straight line β whose partial surface extends in the radial direction from the axis of the rotating column 7. The curved concave surface 8 b is curved so that the vicinity of the joint between the convex spiral strip 8 and the rotating column 7 is recessed toward the inner side of the convex spiral strip 8.

  On the curved concave surface 8b formed on the convex spiral strip 8, when the rotating cylinder 7 rotates, the curved concave surface 8b becomes the back surface of the convex spiral strip 8, and a depression is formed on the curved concave surface 8b. A negative pressure is generated in the curved concave surface 8b, and an air flow is sucked into the negative pressure, whereby an air flow K flowing along the curved concave surface 8b is applied to the circular arc surface 7a of the rotating cylinder 7 following the curved concave surface 8b. As a result, the air flow K is restored to the arc surface 7a of the rotating cylinder 7 in a relatively short time. Therefore, as shown in FIG. 4, the air flow component V that faces the axial direction of the rotating cylinder 7 with the rotation of the convex spiral strip 8 can be efficiently generated. In addition, since the curved concave surface 8b also serves as a recess, it is possible to secure a large area of the arc surface 7a downstream from the curved concave surface 8b, and an increase effect of the Magnus lift Y can be expected.

  One consideration of the inventor is that the convex spiral rather than the air flow component V directed in the axial direction of the rotating cylinder 7 is generated by pressing and moving the air by the inclined surface 8 a of the convex spiral strip 8. When the air is sucked and moved by the negative pressure generated on the curved concave surface 8b of the strip 8, the air can be moved with a stronger force, and the air flow component V directed in the axial direction of the rotating cylinder 7 is efficiently generated. It is thought that it can be generated.

  Furthermore, since the curved concave surface 8b shown in FIG. 6 is inclined in the direction opposite to the rotation direction of the rotating cylinder 7, when the natural wind N hits the curved concave surface 8b, the curved concave surface 8b efficiently uses the natural wind N wind force. Can receive well. The curved concave surface 8b is formed on the back side of the inclined surface 8a of the convex spiral strip 8, so that the rotating cylinder 7 is easily rotated in a predetermined rotation direction, and the natural wind N causes the rotating cylinder 7 to rotate. Can be promoted.

  The inclined surface 8a and the curved concave surface 8b provided on the convex spiral strip 8 have different air resistances with respect to a predetermined wind force, and the inclined surface 8a has less air resistance than the curved concave surface 8b. As long as the cross-sectional shape is formed. The inclined surface 8a and the curved concave surface 8b having different air resistances define the air resistance of the inclined surface 8a and the curved concave surface 8b when air of the same wind speed is applied to the inclined surface 8a and the curved concave surface 8b from the respective directions. is doing.

  Further, the curved concave surface 8b may be inclined in the rotational direction of the rotary cylinder 7 with respect to the straight line β extending in the radial direction from the axis of the rotary cylinder 7, and at least when a predetermined wind force hits the curved concave surface 8b, It is sufficient if the air resistance is larger than that of the inclined surface 8a. Furthermore, the curved concave surface 8b may have a planar shape having no predetermined curvature.

  As shown in FIG. 6, the protruding end of the inclined surface 8a is provided with a minute recess 25 formed by cutting out a part of the inclined surface 8a at the protruding end of the inclined surface 8a of the convex spiral strip 8. It is possible to disturb the surface layer flow of the air in the vicinity of the portion and to prevent the air flow K from being separated from the circular arc surface 7 a of the rotating cylinder 7 by the convex spiral strip 8.

  The minute recess 25 will be described in more detail. The air flow K that flows in the direction away from the axis of the rotating cylinder 7 by the inclined surface 8a will flow further away from the rotating cylinder 7 from the protruding end of the convex spiral 8. However, a small turbulence 25 provided at the tip of the inclined surface 8a generates a small disturbance in the air flow K, and a small vortex W is generated on the curved concave surface 8b side (downstream side) of the convex spiral ridge 8. Let The vortex flow W flows so as to be wound on the curved concave surface 8b side, so that the air flow K flows along the circular arc surface 7a of the rotating cylinder 7, and the stable air flow K in a relatively short time is the circular arc surface 7a. Thus, the Magnus lift Y of the rotating cylinder 7 is additionally increased.

  In addition, although the air resistance of the convex spiral strip 8 is slightly increased by providing the minute concave strip 25 on the convex spiral strip 8, the Magnus lift Y is additionally increased. The ability is improving. Further, in the present embodiment, the minute recess 25 as the air disturbing portion is formed along the protruding end portion of the convex spiral strip 8, but the present invention is not limited to this, and a minute dimple is formed. The air disturbing portion may be formed by arranging a plurality of such concave portions along the protruding end portion of the convex spiral strip 8.

  As shown in FIG. 3, when the rotating body 5 rotates, the generator 15 connected to the rear end of the outer shaft 10 is driven to generate power. Since the convex spiral strip 8 is provided on the rotating cylinder 7, and this convex spiral strip 8 does not receive a large air resistance in each cross section, the rotational resistance around the axis of the rotating cylinder 7 is reduced, and more efficiently. The rotating cylinder 7 is configured to rotate. Furthermore, since the flow of air in the axial direction of the rotating cylinder 7 by the convex spiral strip 8 increases based on the rotation of the rotating cylinder 7, the Magnus lift Y of the rotating cylinder 7 is increased and the generator 15 is driven. The rotational torque of the outer shaft 10 to be increased is increased. Therefore, the power generation efficiency of the Magnus type wind power generator 1 can be increased.

  When power generation is started by the generator 15, a part of the generated power can be supplied to the drive motor 18 for rotating the rotating cylinder 7 and used as auxiliary power, and for the next start-up. It can also be stored in the battery 23 as electric power.

  Further, the rotating cylinders 7 are rotated by using the number of driving motors 18 (one in this embodiment) smaller than the number of rotating cylinders 7 (in this embodiment, 5) using the bevel gears 20 and 21. Therefore, it is possible to save electric power for driving the drive motor 18 and increase the power generation efficiency of the Magnus type wind power generator 1.

  In addition, the large-diameter bevel gear 20 with which the five small-diameter bevel gears 21 are engaged is disposed so as to be narrowed toward the front side, and the rotation direction of the bevel gear 20 and the rotation direction of the rotating body 5 are opposite to each other. Thus, the rotating cylinder 7 can be efficiently rotated with the minimum number of rotations (rotational torque) of the drive motor 18.

  Further, since the vicinity of the joint between the convex spiral strip 8 and the rotating column 7 on the curved concave surface 8b is curved so as to be concave with a predetermined curvature, it is difficult for snow or the like to adhere to the curved concave surface 8b. Even if the water adhering to the curved concave surface 8b is frozen by wind and rain, it is designed to peel off with the expansion of the ice, and even when the Magnus type wind power generator 1 is installed in a cold region, The convex spiral strip 8 is not broken.

  In addition, since the end cap 9 has the round surface 9 a having a predetermined curvature, an air flow can smoothly flow from the front end surface of the rotating column 7 to the outer peripheral surface of the rotating column 7. Therefore, when the rotating cylinder 7 rotates around the outer shaft 10, the generation of Karman vortex or the like generated at the tip of the rotating cylinder 7 can be reduced, and the drag due to the air flow applied to the tip of the rotating cylinder 7 is reduced.

  Conventional propeller-type wind power generators require that the natural wind speed at which power generation can be started be relatively high (5 m or more), and the wind speed that occurs most frequently throughout the year is the low speed range ( In a natural wind of 5 m or less, it was not possible to generate power efficiently. There are also propeller-type wind power generators that can generate power with natural wind in a low speed range (5 m or less), but their power generation efficiency is poor and not suitable for practical use. The Magnus type wind power generator 1 of the present invention requires electric power for rotating the rotating cylinder 7, but not only the natural wind with a relatively high wind speed (5 m or more) but also a low wind speed ( (5 m or less) natural wind can be generated with higher efficiency than the propeller type wind power generator, and if the Magnus type wind power generator 1 of the present embodiment is used, it is more than the conventional propeller type wind power generator. A lot of annual power generation can be secured.

  In addition, the Magnus type wind power generator 1 of the present invention can rotate the rotating body 5 without using the power of the drive motor 18 when the wind speed of the natural wind becomes a predetermined wind speed or higher. More specifically, for example, when the rotating body 5 is rotated in a state where the large-diameter bevel gear 20 disposed at the center of the rotating body 5 is fixed, the small-diameter engaged with the large-diameter bevel gear 20 is used. The bevel gear 21 rotates. In other words, the energy of the natural wind exceeds the resistance of the frictional resistance when the rotating body 5 rotates and the frictional resistance when the rotating cylinder 7 rotates, and the rotating cylinder 7 has a predetermined rotational speed. If the rotating body 5 has the energy to be rotated at (the number of rotations that generates the Magnus lift Y), the rotating body 5 can continue to rotate only with natural wind energy.

  More specifically, the control circuit 24 of the Magnus type wind power generator 1 of the present invention arbitrarily changes the rotational speed (rotational torque) of the drive motor 18 according to the wind speed of natural wind and the rotational speed of the rotating body 5. be able to. The control circuit 24 drives the drive motor 18 when the rotating body 5 starts rotating after the drive motor 18 is driven to rotate the rotating cylinder 7 at the start of power generation when the wind speed of the natural wind is equal to or higher than a predetermined wind speed. Is controlled to generate electricity using only natural wind energy.

  If the rotating body 5 is rotated only by natural wind energy, the bevel gear 20 may be rotated in reverse by the rotational force of the bevel gear 21, but the drive motor 18 and the gear connected to the drive motor 18. Since the one-way clutch 22 is disposed between the bevel gear 20 and the drive motor 18, the bevel gear 20 does not reversely rotate.

  In the case where the rotational friction resistance around the axis of the rotating cylinder 7 is made low, when the natural wind is applied to the rotating cylinder 7, the natural wind presses the curved concave surface 8 b of the convex spiral strip 8. The rotating cylinder 7 can be rotated around the axis by the wind force. Therefore, not only can the power for starting to drive the drive motor 18 be saved, but also the self-rotating Magnus type wind power generator 1 that does not include the drive motor 18 (or uses the drive motor 18 as much as possible) can be manufactured. become.

  Next, the rotating cylinder 26 according to the second embodiment will be described with reference to FIGS. 7 and 8. In addition, about the same component as the component shown by Example 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. FIG. 7 is a front view showing the rotating cylinder 26 provided with the concave spiral strip 27 in the second embodiment, and FIG. 8 is a cross-sectional view taken along line BB showing the rotating cylinder 26 in FIG. Hereinafter, the front side in FIG. 7 will be described as the front side (front side) of the rotating cylinder 26, and the right side of FIG. 8 will be described as the front side (front side) of the rotating cylinder 26.

  As shown in FIG. 7, the substantially cylindrical rotating column 26 provided on the outer periphery of the rotating body 5 is rotatably supported in a predetermined rotation direction around the axis of the rotating column 26. Further, a concave spiral strip 27 formed in a spiral shape is formed on the outer peripheral surface of the rotating cylinder 26, and the concave spiral strip 27 has a substantially concave shape so as to be recessed from the outer peripheral surface of the rotating column 26. Is formed. The concave spiral strip 27 is provided with three strips (odd strips) on the surface of one rotating column 26.

  The concave spiral strip 27 will be described. As shown in FIG. 7, the concave spiral strip 27 forming a triple helix having a required width and a required depth is a right-hand screw-like right when viewed from the front end side of the rotating column 26. It is formed so as to form a spiral. Further, the minute ridge 28 (wind lip) as an air disturbance portion in the present embodiment is formed so as to extend along the vicinity of the concave spiral ridge 27 and slightly protrude from the outer peripheral surface of the rotating cylinder 26. ) Is provided. Further, a disc-shaped end cap 9 is attached to the front end surface of the rotating cylinder 26, and a round surface 9 a having a predetermined curvature is formed on the end cap 9.

  The rotation direction of the rotating cylinder 26 shown in FIG. 8 is counterclockwise, and the concave spiral strip 27 has a substantially concave shape in cross-sectional view. The concave spiral strip 27 is formed with an inclined surface 27a as a first surface in the present embodiment that is inclined in a direction opposite to the rotation direction of the rotating cylinder 26, and is opposed to the inclined surface 27a in the concave spiral strip 27. In the present embodiment, a concave surface 27b is formed as a recess and a second surface formed so as to be recessed with a predetermined curvature.

  In addition, as shown in FIG. 8, the inclined surface 27 a of each concave spiral strip 27 faces the rotational direction side of the rotating cylinder 26, and the curved concave surface 27 b faces the direction opposite to the rotating direction of the rotating cylinder 26. In addition, the inclined surface 27a and the curved concave surface 27b are alternately and appropriately formed so as to be easily rotated in a predetermined direction of the rotating cylinder 26. A substantially convex minute ridge 28 is formed on the arc surface 26a of the rotating cylinder 26 near the boundary between the arc surface 26a of the rotating cylinder 26 and the curved concave surface 27b.

  Referring to FIG. 8, the rotation direction of the rotating cylinder 26 and the winding method of the concave spiral strip 27 will be described in detail. When viewed from the front end side of the rotating cylinder 26, the winding manner of the concave spiral strip 27 of the rotating column 26 is right. In the case of a screw-like right spiral, the rotation direction of the rotating cylinder 26 is counterclockwise. Since the winding direction of the concave spiral stripe 27 is opposite to the rotation direction of the rotating cylinder 26, the air flowing on the outer peripheral surface of the rotating cylinder 26 is directed toward the rotating body 5 as shown in FIG. 7. Can be shed.

  As shown in FIG. 7, the concave spiral strip 27 is applied to the rotating column 26, whereby an air flow F is generated by the concave spiral strip 27 when the rotating column 26 rotates. At this time, on the outer peripheral surface of the rotating cylinder 26, apart from the natural air N or the movement of air on the surface of the rotating cylinder 26 that rotates together with the rotating cylinder 26, the air flow component V ( A vector component V) can be generated. As shown in FIG. 7, the air flow component V flows from the distal end side of the rotating cylinder 26 toward the rotating body 5.

  As shown in FIGS. 7 and 8, the air flow around the outer periphery of the rotating cylinder 26, that is, the air flow F is generated on the outer peripheral surface of the rotating cylinder 26, thereby rotating with the natural wind N and the rotating cylinder 26. A three-dimensional air flow formed by the air movement of the surface layer of the cylinder 26 is formed, and the Magnus lift Y generated by the interaction between the rotation of each rotating cylinder 26 and the wind force is increased.

  Further, as shown in FIG. 8, the concave spiral strips 27 are provided at odd intervals (three strips in the present embodiment) at equal intervals on the cross-sectional circumference of the rotating cylinder 26, and therefore receive a natural wind force. The rotating cylinder 26 can always be brought into an unbalanced state, the self-rotating force of the rotating cylinder 26 can be further increased, and the rotating cylinder 26 can smoothly rotate around the axis.

  Further, as shown in FIG. 8, the concave spiral strip 27 has an asymmetric shape in its cross-sectional shape so that the inclined surface 27a provided on the concave spiral strip 27 and the curved concave surface 27b have different air resistances. ing. It should be noted that the inclined surface 27a of the concave spiral strip 27 is predetermined from the curved concave surface 27b to the circular arc surface 26a so that air resistance when air flows from the inclined surface 27a to the circular arc surface 26a during rotation of the rotating cylinder 26 can be reduced. It is tilted so as to extend close to the tangential direction at the point α ′ to the position of the point α ′. Therefore, air is smoothly moved from the inclined surface 27a to the circular arc surface 26a, the separation of the air flow flowing relative to the rotating cylinder 26 on the surface of the rotating cylinder 26 is suppressed, and the Magnus lift Y is effective. Can be maintained.

  In addition, the inclined surface 27a of the concave spiral strip 27 also serves as the arc surface 26a that causes the generation of lift, and an effect of increasing the Magnus lift Y can be expected. Note that “the inclined surface 27a is inclined so as to extend close to the tangential direction at the point α ′ from the curved concave surface 27b to the position of the predetermined point α ′ on the circular arc surface 26a” is a rotation. This means that the air flow from the upstream side in the rotation direction of the cylinder 26 is inclined so as not to receive a large resistance, and means an inclination that can be appropriately designed by those skilled in the art.

  Further, as shown in FIG. 8, the curved concave surface 27b of the concave spiral strip 27 extends in the radial direction from the axial center of the rotary cylinder 26, and the rotational direction of the rotary cylinder 26 is greater than the straight line β ′ passing through the protruding end of the curved concave surface 27b. It is curved so as to be recessed toward the side, and a part of the inclination is inclined in a direction opposite to the rotation direction of the rotating cylinder 26.

  On the curved concave surface 27b formed on the concave spiral strip 27, when the rotating cylinder 26 rotates, a concave portion is formed on the curved concave surface 27b, thereby generating a negative pressure on the curved concave surface 27b. When the air flow is sucked in, the air flow flowing along the curved concave surface 27b flows to the inclined surface 27a downstream of the curved concave surface 27b of the concave spiral strip 27, and the inclined surface of the concave spiral strip 27 In 27a, a stable air flow is restored in a relatively short time. Therefore, as shown in FIG. 7, the air flow component V directed in the axial direction of the rotating cylinder 26 can be efficiently generated along with the rotation of the concave spiral strip 27. In addition, since the curved concave surface 27b also serves as a dent, it is possible to secure a large area of the arc surface 26a that continues downstream of the curved concave surface 27b, and an effect of increasing the Magnus lift Y can be expected.

  When the natural wind N hits the curved concave surface 27b shown in FIG. 8, the curved concave surface 27b can efficiently receive the natural wind N. The curved concave surface 27b is formed in the concave spiral strip 27 so as to face the inclined surface 27a, so that the rotating cylinder 26 is easily rotated in a predetermined rotation direction, and the natural wind N is rotated by the rotating cylinder 26. Can be promoted.

  As shown in FIG. 8, rotation is achieved by providing a substantially convex minute ridge 28 on the arc surface 26 a of the rotating cylinder 26 in the vicinity of the boundary between the arc surface 26 a and the curved concave surface 27 b of the rotating cylinder 26. Since the surface flow of the air near the boundary between the circular arc surface 26a and the curved concave surface 27b of the cylinder 26 is disturbed, the air flow flowing on the surface of the rotating cylinder 26 is prevented from being separated from the inclined surface 27a of the concave spiral strip 27. The air flow stabilized in a relatively short time returns to the inclined surface 27a and the circular arc surface 26a, and the Magnus lift Y of the rotating cylinder 26 is additionally increased.

  In addition, although the air resistance of the rotating cylinder 26 is slightly increased by providing the minute protrusions 28 on the arc surface 26a of the rotating cylinder 26, the Magnus lift Y is additionally increased. The ability is improving. Further, in the second embodiment, the minute protrusions 28 as the air disturbance portion are formed along the vicinity of the boundary between the circular arc surface 26a of the rotating cylinder 26 and the concave spiral stripe 27, but the present invention is limited to this. Instead, the air disturbance part may be formed by arranging a plurality of minute protrusions along the vicinity of the boundary between the circular arc surface 26 a of the rotating cylinder 26 and the concave spiral strip 27.

  As shown in FIG. 7, a concave spiral strip 27 is provided on the rotating cylinder 26, and the concave spiral strip 27 has a shape that does not receive a large air resistance in each cross section. Therefore, the power generation efficiency of the Magnus type wind power generator 1 can be increased.

  Next, the rotating cylinder 29 according to the third embodiment will be described with reference to FIG. In addition, about the same component as the component shown by Example 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. FIG. 9 is a front view showing the rotating cylinder 29 provided with the convex spiral strip 30 in the third embodiment.

  As shown in FIG. 9, the substantially cylindrical rotating column 29 provided on the outer periphery of the rotating body 5 is rotatably supported in a predetermined rotation direction around the axis of the rotating column 29. A convex spiral strip 30 formed in a spiral shape is integrally formed on the outer peripheral surface of the rotating cylinder 29, and the convex spiral strip 30 is formed on the outer peripheral surface of the rotating cylinder 29. It is formed in a substantially convex shape so as to protrude from.

  Further, the convex spiral strip 30 provided on the rotating cylinder 29 is formed such that its winding density is larger on the distal end side than on the proximal end side of the rotating cylinder 29. As shown in FIG. 9, the width between the convex spiral strips 30 is wider on the proximal side than on the distal side of the rotating column 29.

  The convex spiral strip 30 will be described. As shown in FIG. 9, the convex spiral strip 30 is fixed so as to form a right-handed spiral shape when viewed from the front end side of the rotating column 29. Further, the micro ridge 25 (wind lip) as an air disturbing portion in the present embodiment, which is formed in a substantially concave shape extending along the protruding end portion of the convex spiral ridge 30 and slightly recessed from the outer peripheral surface of the rotating cylinder 29. ) Is provided. Further, a disc-shaped end cap 9 is attached to the front end surface of the rotating cylinder 29, and a round surface 9 a having a predetermined curvature is formed on the end cap 9.

  The rotation direction of the rotating cylinder 29 shown in FIG. 9 is counterclockwise when viewed from the front end side of the rotating cylinder 29, and the convex spiral strip 30 has a substantially fin shape in cross-sectional view. It has a shape that reduces the air resistance generated when it rotates. The convex spiral strip 30 is formed with an inclined surface 30a as the first surface in the present embodiment that is inclined in the direction opposite to the rotation direction of the rotating cylinder 29, and on the back side of the inclined surface 30a of the convex spiral strip 30. Are formed on the inner side of the convex spiral strip 30 so as to be recessed with a predetermined curvature, and the second surface in this embodiment and a curved concave surface 30b as a recessed portion are formed.

  As shown in FIG. 9, the convex spiral strip 30 is applied to the rotating cylinder 29, so that an air flow F is generated by the convex spiral strip 30 when the rotating cylinder 29 rotates. At this time, on the outer peripheral surface of the rotating cylinder 29, apart from the natural air N and the movement of air on the surface of the rotating cylinder 29 that rotates together with the rotating cylinder 29, the air flow component V ( A vector component V) can be generated. As shown in FIG. 9, the air flow component V flows from the distal end side of the rotating cylinder 29 toward the rotating body 5.

  When the rotating cylinder 29 rotates around the rotating body 5, the distal end side receives a wider range of wind than the proximal end side. In the rotating cylinder 29 in the third embodiment, the convex spiral By making the winding density of the strip 30 larger on the distal end side than on the proximal end side, a larger Magnus lift Y can be generated on the distal end side of the rotating cylinder 29. The convex spiral strip 30 configured as described above is effective when a Magnus type wind power generator is installed in an area where the average wind speed is low.

  Next, a rotating cylinder 31 according to the fourth embodiment will be described with reference to FIG. In addition, about the same component as the component shown by Example 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. FIG. 10 is a front view showing the rotating cylinder 31 provided with the convex spiral strip 32 in the fourth embodiment.

  As shown in FIG. 10, a substantially cylindrical rotating column 31 provided on the outer periphery of the rotating body 5 is rotatably supported in a predetermined rotation direction around the axis of the rotating column 31. In addition, a convex spiral strip 32 formed in a spiral (spiral) shape is integrally wound around the outer peripheral surface of the rotating column 31, and the convex spiral strip 32 is formed on the outer peripheral surface of the rotating column 31. It is formed in a substantially convex shape so as to protrude from.

  Further, the convex spiral strip 32 provided on the rotating cylinder 31 is formed so that its winding density is larger on the proximal end side than on the distal end side of the rotating cylinder 31. As shown in FIG. 10, the width between the convex spiral strips 32 is wider on the distal end side than on the proximal end side of the rotating column 31.

  The convex spiral strip 32 will be described. As shown in FIG. 10, the convex spiral strip 32 is fixed so as to form a right-handed spiral shape when viewed from the front end side of the rotating column 31. Further, the micro ridge 25 (wind lip) as an air disturbing portion in the present embodiment is formed so as to extend along the protruding end portion of the convex spiral ridge 32 and to be slightly recessed from the outer peripheral surface of the rotating column 31. ) Is provided. Further, a disc-shaped end cap 9 is attached to the tip surface of the rotating cylinder 31, and a round surface 9 a having a predetermined curvature is formed on the end cap 9.

  The rotating direction of the rotating cylinder 31 shown in FIG. 10 is counterclockwise when viewed from the front end side of the rotating cylinder 31, and the convex spiral strip 32 has a substantially fin shape in cross-sectional view. It has a shape that reduces the air resistance generated when it rotates. The convex spiral strip 32 is formed with an inclined surface 32a as the first surface in the present embodiment that is inclined in the direction opposite to the rotation direction of the rotating cylinder 31, and on the back side of the inclined surface 32a of the convex spiral strip 32. Are formed on the inner side of the convex spiral strip 32 so as to be recessed with a predetermined curvature, and in this embodiment, a curved concave surface 32b is formed as a recess.

  As shown in FIG. 10, the convex spiral strip 32 is applied to the rotating column 31, whereby an air flow F is generated by the convex spiral strip 32 when the rotating column 31 rotates. At this time, on the outer peripheral surface of the rotating cylinder 31, apart from the movement of air on the surface layer of the rotating cylinder 31 rotating together with the natural wind N or the rotating cylinder 31, the air flow component V ( A vector component V) can be generated. As shown in FIG. 10, the air flow component V flows from the distal end side of the rotating cylinder 31 toward the rotating body 5.

  When the rotating cylinder 31 is rotated about the rotating body 5, the air flow is more easily disturbed by the convex spiral strip 32 on the distal end side than on the proximal end side. Thus, by making the winding density of the convex spiral strip 32 larger on the base end side than on the distal end side, the turbulence of the air flow caused by the convex spiral strip 32 generated on the distal end side of the rotating column 31 can be reduced. The convex spiral strip 32 configured in this way is effective when the Magnus type wind power generator is enlarged.

  Next, a rotating cylinder 33 according to the fifth embodiment will be described with reference to FIG. In addition, about the same component as the component shown by Example 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. FIG. 11 is a front view showing the rotating cylinder 33 provided with the convex spiral strip 34 in the fifth embodiment.

  As shown in FIG. 11, the substantially cylindrical rotating column 33 provided on the outer periphery of the rotating body 5 is rotatably supported in a predetermined rotation direction around the axis of the rotating column 33. The diameter of the rotating cylinder 33 is formed so that the distal end side is larger than the proximal end side. Further, a convex spiral strip 34 formed in a spiral shape is integrally wound on the outer peripheral surface of the rotating cylinder 33, and the convex spiral strip 34 is formed on the outer peripheral surface of the rotating cylinder 33. It is formed in a substantially convex shape so as to protrude from.

  The convex spiral strip 34 will be described. As shown in FIG. 11, the convex spiral strip 34 is fixed so as to form a right-handed spiral shape when viewed from the front end side of the rotating column 33. Further, the micro ridge 25 (wind lip) as an air disturbing portion in the present embodiment is formed so as to extend along the protruding end portion of the convex spiral ridge 34 and to be slightly recessed from the outer peripheral surface of the rotating cylinder 33. ) Is provided. Further, a disc-shaped end cap 9 is attached to the front end surface of the rotating cylinder 33, and a round surface 9 a having a predetermined curvature is formed on the end cap 9.

  The rotation direction of the rotating cylinder 33 shown in FIG. 11 is counterclockwise when viewed from the front end side of the rotating cylinder 33, and the convex spiral strip 34 has a substantially fin shape in cross-sectional view. It has a shape that reduces the air resistance generated when it rotates. In this convex spiral strip 34, an inclined surface 34a is formed as a first surface in the present embodiment that is inclined in the direction opposite to the rotation direction of the rotating cylinder 33, and on the back side of the inclined surface 34a in the convex spiral strip 34. Are formed on the inner side of the convex spiral strip 34 so as to be recessed with a predetermined curvature, and the second surface in this embodiment and a curved concave surface 34b as a recess are formed.

  As shown in FIG. 11, the convex spiral strip 34 is applied to the rotating cylinder 33, whereby an air flow F is generated by the convex spiral strip 34 when the rotating cylinder 33 rotates. At this time, on the outer peripheral surface of the rotating cylinder 33, apart from the natural air N and the surface air movement of the rotating cylinder 33 that rotates together with the rotating cylinder 33, the air flow component V ( A vector component V) can be generated. As shown in FIG. 11, the air flow component V flows from the distal end side of the rotating cylinder 33 toward the rotating body 5.

  Further, as shown in FIG. 11, when the rotating cylinder 33 rotates around the rotating body 5, the distal end side receives a wider range of natural wind than the proximal end side. In 33, the rotating cylinder 33 can receive more natural wind by making the diameter of the rotating cylinder 33 larger on the tip side than on the base end side. The rotating cylinder 33 configured in this manner is effective when a Magnus type wind power generator is installed in an area where the annual average wind speed is low.

  Next, a rotating cylinder 35 according to the sixth embodiment will be described with reference to FIG. In addition, about the same component as the component shown by Example 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. FIG. 12 is a front view showing the rotating cylinder 35 provided with the convex spiral strip 36 in the sixth embodiment.

  As shown in FIG. 12, the substantially cylindrical rotating column 35 provided on the outer periphery of the rotating body 5 is rotatably supported in a predetermined rotation direction around the axis of the rotating column 35. The diameter of the rotating cylinder 35 is formed so that the proximal end side is larger than the distal end side. Further, a convex spiral strip 36 formed in a spiral shape is integrally wound on the outer peripheral surface of the rotating cylinder 35, and the convex spiral strip 36 is formed on the outer peripheral surface of the rotating cylinder 35. It is formed in a substantially convex shape so as to protrude from.

  The convex spiral strip 36 will be described. As shown in FIG. 12, the convex spiral strip 36 is fixed so as to form a left-handed left spiral when viewed from the front end side of the rotating cylinder 35. Further, the micro ridge 25 (wind lip) as an air disturbing portion in the present embodiment, which extends along the protruding end portion of the convex spiral ridge 36 and is formed in a substantially concave shape so as to be slightly recessed from the outer peripheral surface of the rotating cylinder 35. ) Is provided.

  The rotating direction of the rotating cylinder 35 shown in FIG. 12 is counterclockwise when viewed from the front end side of the rotating cylinder 35, and the convex spiral strip 36 has a substantially fin shape in a sectional view. It has a shape that reduces the air resistance generated when it rotates. The convex spiral strip 36 is formed with an inclined surface 36a as the first surface in the present embodiment that is inclined in the direction opposite to the rotation direction of the rotating cylinder 35, and on the back side of the inclined surface 36a of the convex spiral strip 36. Are formed on the inner side of the convex spiral strip 36 so as to be recessed with a predetermined curvature in the present embodiment, and a curved concave surface 36b as a recess is formed.

  The rotation direction of the rotating cylinder 35 and how to wind the convex spiral strip 36 will be described in detail. When viewed from the front end side of the rotating cylinder 35, the winding manner of the convex spiral strip 36 of the rotating cylinder 35 is a left-handed left-hand thread. In the case of a spiral shape, the rotation direction of the rotating cylinder 35 is counterclockwise, and the winding direction of the convex spiral strip 36 is the same direction as the rotation direction of the rotating cylinder 35. The flowing air can flow in a direction away from the rotating body 5.

  As shown in FIG. 12, the convex spiral strip 36 is applied to the rotating cylinder 35, whereby an air flow F is generated by the convex spiral strip 36 when the rotating cylinder 35 rotates. At this time, on the outer peripheral surface of the rotating cylinder 35, apart from the movement of air on the surface of the rotating cylinder 35 that rotates together with the natural wind N or the rotating cylinder 35, the air flow component V ( A vector component V) can be generated. As shown in FIG. 12, the air flow component V flows from the proximal end side of the rotating cylinder 35 toward the distal end side of the rotating cylinder 35 so as to be away from the rotating body 5.

  When the air flow component V on the outer peripheral surface of the rotating cylinder 35 flows in a direction away from the rotating body 5, the end cap 9 as in the first to fifth embodiments is attached to the tip surface of the rotating cylinder 35. If it is not provided, the air flow can flow smoothly outward from the tip of the rotating cylinder 35.

  As shown in FIG. 12, the rotating cylinder 35 is configured such that a larger drag (air resistance) is applied to the distal end side than the proximal end side when rotating about the rotating body 5. In the case of 35, the drag applied to the distal end side of the rotating cylinder 35 can be reduced by making the diameter of the rotating cylinder 35 larger on the proximal end side than on the distal end side. The rotating cylinder 35 configured in this manner is effective when the Magnus type wind power generator is enlarged.

  Next, a Magnus type wind power generator 1 ′ according to Example 7 will be described with reference to FIGS. 13 and 14. In addition, about the same component as the component shown by Example 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. FIG. 13 is a front view showing a Magnus type wind power generator 1 ′ according to the seventh embodiment, and FIG. 14 is a side view showing the Magnus type wind power generator 1 ′ according to the seventh embodiment. In the following description, the front side of FIG. 13 is the front side (front side) of the Magnus type wind power generator 1 ′, and the right side of FIG. 14 is the front side (front side) of the Magnus type wind power generator 1 ′.

  As shown in FIG. 13, the rotating body 5 (horizontal rotation shaft) of the Magnus type wind power generator 1 ′ in Example 7 is the same as the Magnus type wind power generator 1 in Example 1 shown in FIG. It is pivotally supported so as to rotate clockwise. Further, the rotating cylinder 7 'in the seventh embodiment is provided with a convex spiral strip 8 having an inclined surface 8a and a curved concave surface 8b, as in the first embodiment. This convex spiral strip 8 can generate an air flow component V that faces the axial direction of the rotating cylinder 7 ′, and the air flowing on the outer peripheral surface of the rotating cylinder 7 ′ flows in a direction approaching the rotating body 5. be able to.

Further, the rotating cylinder 7 ′ in Example 7 is tilted so that the tip surface of the rotating cylinder 7 ′ faces the rotation direction of the rotating body 5. The axis γ of the rotating cylinder 7 ′ is the axis of the rotating body 5. In order not to intersect the center δ, it is tilted in the rotational direction of the rotating body 5 so as to open a predetermined angle θ ₁ (θ ₁ ≈30 ° in this embodiment) from the line segment L intersecting the axis δ of the rotating body 5. Yes.

  In addition, the radial shape in the present invention not only indicates a state in which a linear object extends in four directions from the center, but also indicates a linear object that extends in four directions from the center as shown in a rotating cylinder 7 'in FIG. Even if it is inclined in the middle, it is called radial.

  Furthermore, the five small-sized bevel gears 21 engaged with the large-diameter bevel gear 20 and the bases of the five rotating cylinders 7 ′ are connected by a universal joint (not shown), and the rotating cylinder 7 ′ is inclined. Even if it is, the rotational force of the bevel gear 21 is transmitted.

As shown in FIG. 14, the rotating cylinder 7 ′ is inclined so that the tip surface of the rotating cylinder 7 ′ faces the windward direction, that is, the front side (front side) of the Magnus type wind power generator 1 ′. The axis γ of the rotating cylinder 7 ′ is inclined to the front side so as to open a predetermined angle θ ₂ (θ ₂ ≈15 ° in the present embodiment) from the line segment T that faces in the vertical direction when viewed from the side.

  Reference symbol E shown in FIG. 13 flows in a direction perpendicular to the line segment L that intersects the axis δ of the rotating body 5 when each rotating column 7 ′ rotates about the axis δ of the rotating body 5. For example, when the axis γ of the rotating cylinder 7 ′ intersects the axis δ of the rotating body 5, the air flow E is perpendicular to the outer peripheral surface of the rotating cylinder 7 ′. It has become.

  In the present embodiment, the end surface of the rotating cylinder 7 ′ is inclined so as to face the rotation direction of the rotating body 5 so that the axis γ of the rotating cylinder 7 ′ does not intersect the axis δ of the rotating body 5. As a result, the airflow E hitting the rotating cylinder 7 'comes to strike the outer peripheral surface of the rotating cylinder 7' from an oblique direction. Therefore, the drag force caused by the air flow E applied to the rotating cylinder 7 ′ is reduced, and the rotational torque of the rotating body 5 and the outer shaft 10 that drives the generator 15 is improved.

  Further, as shown in FIG. 13, the air flow component V on the outer peripheral surface of the rotating cylinder 7 ′ is changed so that the tip surface of the rotating cylinder 7 ′ is inclined in the rotation direction of the rotating body 5. It becomes easy to flow in the direction of the rotating body 5 from the tip of 7, and the flow velocity of the air flow component V can be increased. Furthermore, the diameter in front view when the rotating cylinder 7 ′ and the rotating body 5 are rotated can be reduced. That is, it is shown that the length of the rotating cylinder 7 'can be increased by the amount of inclination of the rotating cylinder 7', so that the natural size of the rotating cylinder 7 'can be achieved without changing the overall size of the Magnus type wind power generator 1'. The amount of wind can be increased.

  Further, as shown in FIG. 14, the rotating cylinder 7 ′ is tilted so that the tip surface faces the windward direction (front side), so that the natural wind N flowing from the front side of the Magnus type wind power generator 1 ′ is It comes in contact with the outer peripheral surface of the rotating cylinder 7 ′ from an oblique direction, and the air flow component V on the outer peripheral surface of the rotating cylinder 7 ′ becomes easy to flow in the direction approaching the rotating body 5. The flow rate of can be increased.

  In the Magnus type wind power generator 1 ′ in Example 7, the tip surface of the rotating cylinder 7 ′ is inclined so as to face the rotating direction of the rotating body 5, and the tip surface of the rotating column 7 ′ is in the windward direction ( Although it is inclined so as to face the front side), even if the rotating column 7 'is inclined in this way, the convex spiral strip 8 having the inclined surface 8a and the curved concave surface 8b similar to those in the first embodiment is formed. Since each section does not receive a large air resistance, the rotational resistance around the axis of the rotating cylinder 7 'decreases, and the rotating cylinder 7' rotates more efficiently.

  Incidentally, the rotating cylinder 7 ′ in the seventh embodiment is inclined so that the front end face thereof is directed to the rotating direction of the rotating body 5 and is directed to the windward direction (front side). When the flow component V of the air directed to the axial direction of the rotating cylinder 7 ′ generated by the spiral strip 8 flows in a direction away from the rotating body 5, the rotating cylinder 7 ′ is rotated by the rotating body 5 at the tip surface. The rotating cylinder 7 ′ may be tilted so as to be directed in the direction opposite to the direction and tilted so that the tip surface thereof is directed in the leeward direction (back side). In this way, the same effect as in the seventh embodiment can be obtained.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the spiral strip is provided over the entire longitudinal direction of the rotating cylinder, thereby generating the air flow component V facing the axial direction of the rotating cylinder on the outer peripheral surface of the rotating cylinder. However, the present invention is not limited to this, and a spiral strip is provided on a part of the rotating cylinder in the longitudinal direction (tip / center / proximal end of the rotating cylinder), and the air faces the axial direction of the rotating cylinder. The flow component V may be generated.

  Moreover, although the said Example 3-7 has demonstrated and demonstrated the convex spiral strip formed so that it might protrude from the outer peripheral surface of a rotation cylinder, this invention is not limited to this, Implementation A concave spiral strip 27 formed in a substantially concave shape so as to be recessed from the outer peripheral surface of the rotating cylinder 26 used in Example 2 may be applied to Examples 3 to 7.

  Furthermore, in the above embodiment, the required width and required height / depth of the spiral strip provided on the rotating cylinder are the same from the distal end side to the proximal end side of the rotating cylinder. However, the present invention is not limited to this, and the required width and required height / depth of the spiral strip may be different from each other on the distal end side and the proximal end side of the rotating cylinder. For example, the spiral strip may be formed so that its required width varies as it goes from the distal end side to the proximal end side of the rotating cylinder. The depth may be different between the proximal end side and the depth of the concave spiral strip may be different between the distal end side and the proximal end side of the rotating cylinder.

  In the above-described embodiment, the cross-sectional shape of the spiral strip provided on the rotating cylinder is formed to be the same from the distal end side to the proximal end side of the rotating cylinder, and all the portions of the spiral strip reduce the air resistance. However, the present invention is not limited to this, and it is sufficient that the spiral strip has at least a partial cross-sectional shape in the longitudinal direction to reduce the air resistance. It is not necessary that all portions in the longitudinal direction of the spiral strip from the distal end side to the proximal end side in the above are designed to reduce the air resistance.

  In Example 1 and Examples 3-7, the convex spiral strips have a substantially fin shape in cross-sectional view. However, the present invention is not limited to this, and is linear in cross-sectional view. It is also possible to provide a plate-shaped convex spiral strip on the surface of the rotating cylinder and tilt the plate-shaped convex spiral strip in the direction opposite to the rotational direction of the rotating cylinder. If it does so, an inclined surface and a curved recessed part (dent part) can be easily formed in a convex spiral strip.

  According to the Magnus type wind power generator of the present invention, it can be utilized from a large wind power generation to a small wind power generation for home use, and greatly contributes to the wind power generation industry. Furthermore, if the Magnus type lift generating mechanism of the present invention is used for a rotor ship, a rotor vehicle, etc., it is considered that the motion efficiency in the vehicle is also improved.

Claims (10)

A horizontal rotating shaft that transmits rotational torque to the power generation mechanism and rotating cylinders arranged in a required number substantially radially from the horizontal rotating shaft, and each rotating cylinder rotates around the axis of the rotating cylinder; , A Magnus type wind power generator that drives the power generation mechanism section by rotating the horizontal rotation shaft by Magnus lift generated by the interaction between the rotation of each rotating cylinder and wind power,
A spiral strip formed in a convex shape or a concave shape is provided on at least a part of the outer circumferential surface of the rotating cylinder, and the flow of air that faces at least the axial direction of the rotating cylinder on the outer circumferential surface of the rotating cylinder by the spiral strip. And a cross-sectional shape of at least a portion of the spiral strip has a shape that reduces air resistance generated when rotating in a predetermined rotation direction around the axis of the rotating cylinder. Magnus type wind power generator characterized by that.   The spiral strip has at least a first surface and a second surface each having different air resistance with respect to a predetermined wind force, and the first surface has a lower air resistance than the second surface. 2. The Magnus type wind power generator according to claim 1, wherein the spiral surface of the first surface and the second surface is asymmetric in cross-sectional shape.   The Magnus type wind power generator according to claim 2, wherein the spiral strip is provided with a plurality of strips of at least three or more with respect to one rotating column.   4. The Magnus type wind power generator according to claim 3, wherein the spiral stripes are provided at odd intervals at equal intervals in a cross-sectional view of the rotating column.   The rotating cylinder is composed of at least a circular arc surface and a convex spiral strip, and the first surface of the convex spiral strip has air from the arc surface of the rotating column to the first surface when the rotating cylinder rotates. 5. The Magnus type wind power generator according to claim 2, wherein the first surface extends close to a tangential direction of the arc surface so as to reduce air resistance when flowing.   The Magnus type wind power generator according to claim 5, wherein an air disturbance part is formed at a protruding end part of the first surface of the convex spiral strip.   The Magnus type wind power generator according to claim 5 or 6, wherein a concave portion is formed on the second surface of the convex spiral strip.   The rotating cylinder is composed of at least an arc surface and a concave spiral strip, and the first surface of the concave spiral strip is air when air flows from the first surface to the arc surface of the rotating column when the rotating cylinder rotates. 5. The Magnus type wind power generator according to claim 2, wherein the first surface extends close to a tangential direction of the arc surface so that the resistance can be reduced.   9. The Magnus type wind power generator according to claim 8, wherein an air disturbing portion is formed in the vicinity of a boundary between the second surface of the concave spiral strip and the arc surface of the rotating cylinder.   The Magnus type wind power generator according to claim 8 or 9, wherein a hollow part is formed in the 2nd surface of said concave spiral strip.

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