JP2019120156A - Wind generator system for movable body and movable body with the same - Google Patents

Abstract

To provide a wind generator system for movable body showing a high conversion efficiency from wind power to rotary energy and showing high durability.SOLUTION: A wind generator system for movable body is constituted in such a way that there are provided wind channels 1a, 1b, 1c; an impeller 5 installed in the wind channels and having a hub and several blades; and a power generator 9 generating power through rotation of the impeller. The hub has either an approximate conical part or approximate head cut-conical part of which diameter becomes large as it faces from a front end part side to a rear end part side. Each of several blades is formed to have a predetermined angle in slant form in respect to a bus line of either an approximate conical part or an approximate head cut-conical part from a position near the front end part of the hub to a position near the rear end part.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a wind power generation system for a mobile, and a mobile including the same.

  In recent years, electric vehicles that travel using electricity as an energy source have attracted attention. Electric vehicles have the advantage of not emitting exhaust gas while traveling, etc., but have problems such as shorter cruising distance than gasoline vehicles and that it takes several hours to charge.

  In order to solve such a problem, it has been proposed to attach a small-sized wind power generator to an electric vehicle and to perform charging while traveling using the wind power received while traveling. As such a wind power generator for an electric vehicle, for example, Patent Document 1 proposes a wind power generator using an impeller in which a plurality of small blades are arranged side by side on the surface of a truncated cone drum. Further, for example, Patent Document 2 proposes a wind power generator using a spiral impeller.

JP, 2010-101275, A JP 2017-149168 A

  However, the wind turbine generator described in Patent Document 1 aims to generate power while traveling at high speed. In the impeller of Patent Document 1, since the blades are small and the blades are arranged along the axial direction, the conversion efficiency from wind power to rotational energy is not sufficient. For example, during traveling at low speed, It is difficult to make the rotational speed of the impeller sufficient, and as a result, there is a problem that a sufficient amount of power generation can not be obtained.

  Moreover, although the wind power generator described in patent document 2 improves the conversion efficiency from wind power to rotational energy by using a spiral impeller, the durability is not sufficient. For example, while traveling at high speed, there is a problem that the impeller is easily damaged because the force received from the air flow becomes very large.

  The present invention has been made in view of the above problems. That is, an object of the present invention is to provide a wind power generation system for a mobile body, which has high conversion efficiency from wind power to rotational energy and durability.

  The gist of the present invention is as follows.

  [1] A wind tunnel, an impeller disposed in the wind tunnel and having a hub and a plurality of blades, and a generator generating electricity by rotation of the impeller, wherein the hub goes from the front end to the rear end Each of the plurality of blades extends from near the front end to near the rear end of the hub with respect to the generatrix of the substantially conical or frustoconical portion. A wind power generation system for a mobile body, which is formed obliquely at a predetermined angle.

  [2] The blade according to the above-mentioned [1], wherein the blade has a substantially triangular shape, and a portion corresponding to the substantially triangular hypotenuse is in contact with the side surface of the substantially conical portion or the substantially truncated cone portion. Wind power generation system for mobiles.

  [3] When the impeller is cut by any plane perpendicular to the rotation axis of the impeller, the length of the blade in the cross section is the radius of the bottom of the substantially conical portion or the substantially truncated cone and the substantially conical portion or The wind power generation system for a mobile unit according to the above [1] or [2], which is substantially equal to a difference from the radius of the cross section of the truncated cone.

  [4] The wind power generation system for a mobile according to any one of the above [1] to [3], wherein the predetermined angle is 25 to 45 degrees.

  [5] When attention is paid to any one blade, the one blade is formed without going around the side surface of the substantially conical portion or the substantially truncated cone portion according to the above [1] to [4] Wind power generation system for a mobile according to any of the above.

  [6] The wind tunnel is between the front end portion and the rear end portion of the wind tunnel and exhausts the wind that has flowed in from the front end portion of the wind tunnel to a position corresponding to the vicinity of the rear end portion of the impeller. The wind power generation system for a mobile according to any one of the above [1] to [5], having an opening of

  [7] A mobile body comprising the wind power generation system for mobile bodies according to any one of the above [1] to [6].

  According to the wind power generation system of the present invention, the impeller has the hub and the plurality of blades, and the substantially conical portion or the substantially frusto-conical portion whose diameter increases from the front end to the rear end And each of the plurality of blades is formed so as to form a predetermined angle obliquely with respect to the generatrix of the substantially conical portion or the substantially frusto-conical portion from the vicinity of the front end to the vicinity of the rear end of the hub. The conversion efficiency from wind power to rotational energy by the impeller is high, and a sufficient amount of power generation can be obtained even while traveling at low speed.

FIG. 1 is a front view showing an example of a wind power generation system according to an embodiment of the present invention. It is a side view showing an example of a wind power generation system concerning an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a fragmentary sectional view which shows an example of the wind power generation system concerning embodiment of this invention. It is a schematic diagram which shows the inhalation | air-intake and exhaust_gas | exhaustion of a wind power generation system concerning embodiment of this invention. It is a perspective view showing an example of an impeller concerning an embodiment of the present invention. It is a schematic diagram which shows an example of the impeller concerning embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described using the drawings, but the present invention is not limited to the drawings and the embodiments. Further, the present invention is not limited to the preferable numerical values and configurations described below.

  As used herein, "axial" refers to a direction parallel to the axis of rotation of the impeller. Moreover, "radial direction" means the direction perpendicular | vertical to the rotating shaft of an impeller.

[Wind power generation system]
FIG. 1 is a front view showing an example of a wind power generation system according to an embodiment of the present invention. FIG. 2 is a side view showing an example of the wind power generation system according to the embodiment of the present invention, and is a view of the wind power generation system shown in FIG. 1 as viewed from the side. FIG. 3 is a partial cross-sectional view showing an example of the wind power generation system according to the embodiment of the present invention, and is a schematic view showing the internal structure of the wind tunnel in the wind power generation system shown in FIG.

  The wind power generation system shown in FIGS. 1 to 3 includes a substantially cylindrical wind tunnel 1 and a pedestal 2 for supporting the wind tunnel 1. Further, inside the wind tunnel 1, an impeller 5 having a hub 3 and blades 4, a speed increaser 7, an output shaft 8, a generator 9, and a control device 10 are provided. In addition, in FIG. 3, the speed increasing machine 7, the output shaft 8, the generator 9, and the control apparatus 10 do not show each specific structure, but simply show each arrangement | positioning.

  The wind tunnel 1 improves the amount of power generation and the power generation efficiency by focusing the wind inside and accelerating the wind flowing into the inside. In addition, the wind tunnel 1 has a role of protecting those disposed inside the wind tunnel 1 such as the impeller 5 and the generator 9.

  As shown in FIGS. 2 and 3, the wind tunnel 1 preferably includes a substantially cylindrical wind tunnel front portion 1 a, a wind tunnel connecting portion 1 b, and a substantially cylindrical wind tunnel rear portion 1 c. The wind tunnel front portion 1a and the wind tunnel rear portion 1c are disposed at a predetermined interval, and the wind tunnel front portion 1a and the wind tunnel rear portion 1c are connected by the wind tunnel connecting portion 1b so that an opening can be formed therebetween. There is.

  The front end of the wind tunnel front portion 1a is an air inlet. The wind tunnel front portion 1a focuses the relative air flow generated by the movement of the moving body inside the wind tunnel front portion 1a, and accelerates the air flow flowing into the inside. As a result, it becomes possible to provide sufficient wind power to the internally provided impeller 5 and to improve the amount of power generation and the power generation efficiency. From the viewpoint of enhancing the air flow focusing effect, as shown in FIG. 3, it is preferable that the vicinity of the front end of the wind tunnel front portion 1a be configured so that the inner diameter of the wind tunnel front portion 1a gradually decreases.

  The wind tunnel connecting portion 1b is not particularly limited as long as it connects the wind tunnel front portion 1a and the wind tunnel rear portion 1c so as to form an opening. The opening is for discharging the air flow, rain, etc. that has flowed into the wind tunnel 1 out of the wind tunnel 1.

  FIG. 4 is a schematic view showing the intake and exhaust of the wind power generation system according to the embodiment of the present invention. The wind power generation system according to the present embodiment can draw in air flow from the front end of the wind tunnel front part 1a to the inside of the wind tunnel front part 1a, and exhaust at least a part of the drawn air flow from the opening. Therefore, the disturbance of the air flow which may occur behind the impeller 5 in the wind tunnel 1 can be suppressed, and as a result, the power generation amount and the power generation efficiency can be improved. In addition, it is possible to reduce the air flow colliding with the speed increasing machine 7 and the generator 9 and the like arranged behind the opening, and as a result, the speed increasing machine 7 and the generator 9 and the like are arranged behind the opening It becomes possible to prevent the damage of things.

  In addition, by providing the opening, for example, rain, dust and the like that has entered the inside of the wind tunnel front portion 1a can be discharged to the outside of the wind tunnel 1, so that the openings of the speed increasing machine 7 and the generator 9 etc. It is possible to reduce the possibility of damage caused by rain or dust placed behind. Note that, as described above, since the airflow blows out of the wind tunnel 1 from the opening, there is little possibility that rain or dust intrudes into the wind tunnel 1 from the opening.

  The opening is preferably located at a position corresponding to the vicinity of the rear end of the impeller 5. The blade 4 according to the present embodiment is configured such that the wind receiving area is large at the front end portion of the impeller 5 and the wind receiving area becomes smaller toward the rear end portion of the impeller 5. Therefore, although the air flow has a large influence on the rotation of the impeller 5 at the front end of the impeller 5, the air flow has a small influence on the rotation of the impeller 5 at the rear end of the impeller 5. By providing the opening in a position corresponding to the vicinity of the rear end of the impeller 5, it is possible to give sufficient rotational energy to the impeller 5 and prevent breakage of the one disposed behind the opening. Become.

  The width of the opening, that is, the distance between the rear end of the wind tunnel front portion 1a and the front end of the wind tunnel rear portion 1c, can be at least a part of the air flow that has flowed into the wind tunnel front portion 1a. There is no particular restriction.

  A speed increasing gear 7, an output shaft 8, a generator 9, and a control device 10 are disposed inside the wind tunnel rear portion 1c. The wind tunnel rear part 1c has a role of protecting the one disposed inside. The shape and size of the wind tunnel rear portion 1c are not particularly limited, and can be appropriately determined according to the shape and size of the generator 9, and may be different from, for example, the wind tunnel front portion 1a.

  The pedestal 2 supports the wind tunnel 1. The shape and size of the pedestal 2 are not particularly limited, and can be appropriately determined according to the type and size of the moving body, and the position attached to the moving body.

  The impeller 5 is disposed such that the vicinity of the rear end portion of the impeller 5 corresponds to the opening of the wind tunnel 1 and the other portion is positioned inside the wind tunnel front portion 1a. The impeller 5 includes a hub 3, a plurality of blades 4, and a rotation shaft.

  The hub 3 has a substantially conical portion or a substantially frusto-conical portion whose diameter increases from the front end side to the rear end side of the hub 3. Since the diameter on the front end side of the hub 3 is small, the radial length of the blades 4 can be increased near the front end of the hub 3. Therefore, the air flow received by the blades 4 can be efficiently converted to rotational energy, and for example, even when moving at low speed (for example, about 10 km per hour), it is possible to obtain a sufficient amount of power generation.

  Further, since the diameter of the rear end portion side of the hub 3 is large, in the vicinity of the rear end portion of the hub 3, the size of the diameter becomes several times the radial length of the blades 4. Therefore, the impeller 5 according to the present embodiment has sufficient strength and durability, and for example, when moving at a high speed, there is little risk of breakage even if it receives strong air flow.

  The diameter of the bottom of the substantially conical or truncated cone of the hub 3 is not particularly limited, but from the viewpoint of efficiently converting the air flow that has flowed into the wind tunnel front portion 1a into rotational energy, for example, wind tunnel It is preferable that the inner diameter of the front portion 1a be substantially equal.

  The rotation axis is provided on a line connecting the apex of the substantially conical portion to the center of the circle on the bottom, or on a line connecting the center of the circle on the top of the substantially truncated cone to the center of the circle on the bottom There is. The rotation shaft may be integrally formed with the hub 3 or may be formed independently of the hub 3 and fitted to the hub 3. The rotation shaft rotates in conjunction with the rotation of the impeller 5, and the rotation is input to the speed increaser 7.

  Each of the plurality of blades 4 is formed so as to form a predetermined angle obliquely with respect to the generatrix of the substantially conical portion or the substantially truncated cone from the vicinity of the front end to the vicinity of the rear end of the hub 3 And a diameter (vane diameter) close to the inner diameter of the wind tunnel front portion 1a. With such a configuration, the wind receiving area received by the blades 4 is increased, and almost all the air flow flowing into the wind tunnel front portion 1a can be received by any of the plurality of blades 4, so that the impeller is sufficient. Rotation energy can be obtained to obtain a sufficient number of rotations.

  The predetermined angle is not particularly limited, but for example, 25 degrees or more is preferable, and 40 degrees or less is preferable. When the predetermined angle is less than 25 degrees, for example, the blades 4 and the air flow hardly collide with each other, and the number of rotations of the impeller may be reduced. When the predetermined angle exceeds 40 degrees, for example, turbulence of the air flow tends to occur after the blade 4 collides with the air flow, and the rotational speed of the impeller may be reduced.

  Further, the vanes 4 may be formed in a so-called spiral shape in which the side surface of the substantially conical portion or the substantially truncated cone portion is made one or more turns, but in the space between two adjacent vanes 4 From the viewpoint of making it difficult for the disturbance to occur, it is preferable to form without circling the side surface of the substantially conical portion or the substantially truncated cone portion.

  In the front view shown in FIG. 1, each of the plurality of blades 4 radially extends from the vicinity of the front end of the hub 3 (the side near the upper surface of the substantially truncated cone) to the vicinity of the inner wall of the wind tunnel 1. When the blades 4 have a sufficient length near the front end of the hub 3, the air flow that has flowed into the wind tunnel front portion 1a can be efficiently converted into rotational energy.

  Hereinafter, the impeller according to the present embodiment will be further described using FIGS. 5 and 6. FIG. 5 is a perspective view showing an example of an impeller according to the embodiment of the present invention. FIG. 6 is a schematic view showing an example of the impeller according to the embodiment of the present invention, and a part of the impeller is shown in a simplified manner for easy understanding. Therefore, although there is a portion that is not consistent with FIG. 5, it is correct that the portion that is not consistent is interpreted according to FIG.

  The impeller 5 shown in FIGS. 5 and 6 includes a hub 3 having a substantially truncated cone, a plurality of blades 4 and a rotation shaft 6. Also, the hub 3 shown in FIG. 6 schematically represents a cross section when the hub 3 is cut by a plane including a line segment connecting the center of the circle on the upper surface of the substantially truncated cone and the center of the circle on the bottom. It is a thing. Moreover, the blade | wing 4 shows simply two sheets in the position which opposes, and the other blade | wing 4 is abbreviate | omitted. More precisely, the upper blade 4 in FIG. 6 is located at the back of the drawing at the front end of the impeller 5 and at the front of the drawing at the rear end of the impeller 5. The lower blade 4 in FIG. 6 is located on the front side of the drawing at the front end of the impeller 5 and at the rear of the drawing at the rear end of the impeller 5. Note that the contents described above with reference to FIGS. 1 to 4 can be appropriately used for the hub 3, the plurality of blades 4, the impeller 5 and the rotation shaft 6 shown in FIGS. The description is omitted.

  As shown in FIG. 5, it is preferable that the length of the blades 4 in the radial direction be long near the front end of the hub 3 and short near the rear end of the hub 3, for example. Moreover, when the impeller 5 is cut by any plane perpendicular to the rotation axis of the impeller 5, the length of the blade 4 in the cross section thereof is substantially the radius of the bottom of the substantially conical portion or the substantially truncated cone, Preferably, it is approximately equal to the difference with the radius of the cross section of the cone or substantially truncated cone. With such a configuration, the conversion efficiency from wind power to rotational energy can be further enhanced, and for example, even when the moving object moves at a low speed, it is possible to obtain a sufficient amount of power generation. .

  From the same viewpoint, as the shape of the blade 4, for example, a substantially triangular shape is preferable, and a substantially right triangular shape is more preferable. When making the shape of the blade 4 into a substantially triangular shape or a substantially right triangle shape, it is preferable to configure the impeller 5 such that a portion corresponding to the oblique side is in contact with the side surface of the substantially conical portion or the substantially truncated cone portion.

  In addition, since the diameter is large in the vicinity of the rear end portion of the hub 3, in the vicinity of the rear end portion of the hub 3, the space through which the air flow passes in the impeller 5 becomes small, and the pressure of the air flow increases. By guiding the air flow to the opening provided in the wind tunnel 1 in a state where the pressure of the air flow is increased, exhaust from the opening can be efficiently performed, and the one disposed inside the wind tunnel rear portion 1c It is possible to reduce the possibility of breakage.

  It returns to the explanation of FIG. The speed increaser 7 is disposed between the impeller 5 and the generator 9. The speed increasing machine 7 increases the rotational speed input from the rotation shaft (input shaft) 6 of the impeller 5 and transmits the rotation speed to the generator 9 through the output shaft 8. By providing the speed increaser 7, it is possible to obtain a sufficient amount of power generation and power generation efficiency even when the moving speed of the moving object is low and the rotation speed of the impeller is insufficient. The speed increasing machine 7 is not particularly limited, and, for example, conventionally known ones can be appropriately adopted according to the required amount of power generation, the type of the generator 9, and the like.

  The generator 9 converts the rotational energy transmitted via the output shaft 8 into electrical energy. The generator is not particularly limited, and, for example, conventionally known ones can be appropriately adopted according to the type of the storage battery provided in the mobile body and the like. The generator 9 may be a direct current generator or an alternating current generator. For example, when storing generated current in a storage battery, the direct current generator or an alternating current generator (for example, an alternator) including a rectifier is used. preferable.

  The electrical energy obtained by the generator 9 is stored in a storage battery (not shown) provided in the mobile unit. It does not restrict | limit especially as a storage battery, For example, conventionally well-known things, such as a lithium ion battery and a lead storage battery, are employable suitably. Also, it may be a so-called all solid battery. When the mobile unit includes a storage battery as a motive power source, it is preferable that the storage battery be a motive power source.

  The control device 10 is electrically connected to the generator 9 via a cable or the like (not shown). The control device 10 performs control when storing the electrical energy obtained by the generator 9 in the storage battery. The control device 10 performs control of the output voltage to the storage battery, for example, so that overcharging does not occur when the storage battery is a lithium ion battery or the like. When the storage battery is a lead storage battery and the control of the output voltage to the storage battery is unnecessary, the control device 10 may not be provided. The control device 10 may be provided, for example, in the vicinity of the storage battery, not inside the rear portion 1c of the wind tunnel.

[Mobile body]
Next, the mobile unit according to the embodiment of the present invention will be described. A mobile body is, for example, one that can move on land, sea, or the air at a predetermined speed (eg, 10 km / hour) at which wind power can be generated. Specific examples of mobile objects include bicycles, motorcycles, automobiles, ships, unmanned aerial vehicles (eg, drone) and the like.

  The power source of the moving body is not particularly limited, such as human power, gasoline, power, etc., but power is preferred. For example, in the case of a mobile body powered by the power provided to the storage battery, the power consumed by the movement can be compensated by the power generated by the wind power generation system, and therefore the cruising distance can be extended. Specific examples of the moving body driven by electric power include an electric bicycle, an electric motorcycle, an electric car, and a drone. In addition, even when the power source of the mobile unit is not electric power, it is useful because the generated electric power can be stored in a storage battery and used for other applications.

  The mounting position of the wind power generation system is not particularly limited as long as it can receive the relative air flow generated by the movement. The mounting position of the wind power generation system may be inside or outside of the mobile unit, and may be determined appropriately according to the type and size of the mobile unit. When the mobile body is an electric car, for example, a position at which an aero part such as a spoiler is attached, or the inside of a bonnet may be mentioned. In the case of mounting in the bonnet, for example, power is generated by the air flow flowing from the front grille. Alternatively, a dedicated mounting space may be provided in the body of the electric vehicle, and may be embedded in the body in such a manner that the air flow can flow into the intake port of the wind power generation system. From the viewpoint of being able to reduce the possibility of breakage, it is preferable to dispose in the hood or in a manner to be embedded in the body.

  The number of wind power generation systems attached to the mobile body is not particularly limited, and may be appropriately determined according to the required amount of power generation. The wind power generation system according to the above-described embodiment is very small and lightweight compared to the wind power generation device installed in the conventional wind power plant, so that it can be easily attached to a mobile body, and Even when attached, there is little burden on the mobile unit.

1 Wind tunnel 1a Wind tunnel front portion 1b Wind tunnel connection portion 1c Wind tunnel rear portion 2 pedestal 3 hub 4 blades 5 impeller 6 rotation shaft (input shaft)
7 Speed increaser 8 Output shaft 9 Generator 10 Controller

Claims (7)

With the wind tunnel,
An impeller disposed in the wind tunnel and having a hub and a plurality of blades;
And a generator that generates electricity by rotation of the impeller,
The hub has a generally conical portion or a generally frusto-conical portion whose diameter increases from the front end side toward the rear end side;
Each of the plurality of blades is formed so as to form a predetermined angle obliquely with respect to a generatrix of the substantially conical portion or the substantially truncated cone from the vicinity of the front end to the vicinity of the rear end of the hub.
Wind power generation system for mobiles. The blade is formed in a substantially triangular shape such that a portion corresponding to the substantially triangular hypotenuse contacts a side surface of the substantially conical portion or the substantially truncated cone portion.
A wind power generation system for a mobile according to claim 1. When the impeller is cut by any plane perpendicular to the rotation axis of the impeller, the length of the blade in the cross section is the radius of the bottom of the substantially conical portion or the substantially truncated cone, and the substantially conical portion or substantially truncated Approximately equal to the difference with the radius of the cross section of the cone,
The wind power generation system for a mobile according to claim 1 or 2. The predetermined angle is 25 to 45 degrees,
The wind power generation system for a mobile according to any one of claims 1 to 3. When attention is paid to any one blade, the one blade is formed without going around the side surface of the substantially conical portion or the substantially truncated cone portion.
The wind power generation system for a mobile according to any one of claims 1 to 4. An opening for discharging the wind, which has flowed from the front end of the wind tunnel, out of the wind tunnel to a position corresponding to the vicinity of the rear end of the impeller between the front end and the rear end of the wind tunnel. Have
The wind power generation system for a mobile according to any one of claims 1 to 5.   A moving body comprising the wind power generation system for a moving body according to any one of claims 1 to 6.

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