WO2023176310A1

WO2023176310A1 - Support leg fixing structure for vertical axis wind turbine

Info

Publication number: WO2023176310A1
Application number: PCT/JP2023/005722
Authority: WO
Inventors: 玉丹朴; 博光石川; 猛小野; 博幸樋上; 栄徳斎藤; 豊原
Original assignee: 日軽金アクト株式会社; 国立大学法人鳥取大学
Priority date: 2022-03-18
Filing date: 2023-02-17
Publication date: 2023-09-21
Also published as: JP2023137639A

Abstract

In order to address an increase in size of a wind turbine and an increase in number of wind turbines installed, the present invention provides a support leg fixing structure for a vertical axis wind turbine which facilitates and strengthens the assembly of a support leg and a bearing part of a rotation shaft.　A vertical axis wind turbine is provided with: a rotation shaft 2 that rotates about an axis that is perpendicular to the direction in which wind is received; a power generation part 6 that is connected to the rotation shaft 2 via a bearing part 3; and a plurality of blades 10 that are connected to the rotation shaft 2 and that rotate about the vertical axis. The bearing part 3 has a cylindrical housing 3d that, along the lengthwise direction of the rotation shaft 2, holds a bearing 3c which rotatably supports the rotation shaft 2. A housing receiving member 40 comprising an aluminum extruded material is fixed to the outer peripheral surface of the housing 3d of the bearing part 3. A support leg receiving member 50 comprising an aluminum extruded material is fixed to the outer peripheral surface of the housing receiving member 40, along the circumferential direction of the rotation shaft 2. An end face of a support leg 5 is in contact with and fixed to an outer surface of the support leg receiving member 50.

Description

Vertical axis wind turbine support leg fixing structure

This invention relates to a support leg fixing structure for a vertical axis wind turbine.

Conventionally, a rotating shaft rotates around an axis perpendicular to the direction in which the wind is received, a power generating section is connected to the rotating shaft via a bearing, and a plurality of power generating units are connected to the rotating shaft and rotate around the vertical axis. 2. Description of the Related Art Vertical axis wind turbines having wind turbine blades (hereinafter referred to as blades) are known.
Further, in this type of vertical axis wind turbine, each of the blades is formed to have a hollow cross section, and includes a pair of extending portions that extend so that the distance between them increases as the distance from the rotation axis increases, and a pair of extension portions that are substantially parallel to the rotation axis. A vertical axis wind turbine called a so-called butterfly wind turbine is known, which has an outer portion extending along the direction of 179184, JP 2020-29853, JP 2018-59481).

The vertical axis wind turbines described in JP2021-179184A, JP2020-29853A, and JP2018-59481A have characteristics that their performance does not depend on the wind direction, and can suppress noise and vibration. Therefore, it has a simple structure and is said to be suitable for lower costs.
In addition, recently, wind turbines for power generation, which are superior in power generation costs, are expected to be used to promote the introduction of renewable energy.

On the other hand, in order to reduce power generation costs as windmills for power generation, windmills themselves are expected to become larger and the number of installations will increase, so higher strength and higher workability are required in the structure of windmills.

In the vertical axis wind turbines described in JP2021-179184A, JP2020-29853A, and JP2018-59481A, a bearing part that rotatably supports a rotating shaft to which a plurality of blades are connected is provided. Although it is installed in a fixed state using support legs, there is no mention of the fixing structure between the bearing and the support legs.

However, in order to obtain higher strength and higher workability to cope with the increase in the size of the wind turbine itself and the increase in the number of installations, it is necessary to devise ways to assemble the bearing of the rotating shaft that connects multiple blades with the supporting legs. is necessary.

This invention was made in view of the above circumstances, and is a vertical axis wind turbine in which the bearing part of the rotating shaft and the support legs can be easily and firmly assembled in order to cope with the increase in the size of the wind turbine itself and the increase in the number of installations. An object of the present invention is to provide a support leg fixing structure.

In order to achieve the above object, the present invention includes a rotating shaft that rotates around an axis perpendicular to the direction in which the wind is received, a power generation section connected to the rotating shaft via a bearing section, and a power generating section connected to the rotating shaft via a bearing section. A supporting leg fixing structure for a vertical axis wind turbine comprising a plurality of blades connected to each other and rotating around a vertical axis, wherein the bearing part supports a bearing rotatably supporting the rotating shaft in a longitudinal direction of the rotating shaft. A housing receiving member made of an extruded aluminum member is fixed to the outer peripheral surface of the housing of the bearing portion, and an extruded aluminum member is fixed to the outer peripheral surface of the housing receiving member. A supporting leg receiving material made of a shape is fixed along the circumferential direction of the rotating shaft, and the end surface of the supporting leg is fixed in contact with the outer surface of the supporting leg receiving material. do.

With this configuration, the housing receiving member made of an extruded aluminum member is fixed to the outer peripheral surface of the housing of the bearing part, and the support leg is made of an extruded aluminum member fixed to the outer peripheral surface of the housing receiving member. The support leg can be fixed to the bearing part via the receiving member.

In this invention, the housing and the housing receiving member are arranged such that a grooved line along the longitudinal direction of the housing provided on one of the housing and the housing receiving member and a protruding line provided on the other side are fitted into each other. Preferably, they are fixed together.

With this configuration, the grooved line provided on either one of the housing and the housing receiving member is fitted with the protruding line provided on the other, thereby fixing the housing receiving member to the outer peripheral surface of the housing. I can do it.

Further, in this invention, a bolt fastening portion is provided on the outer circumferential surface of the housing receiving member along the longitudinal direction of the rotating shaft, and the inner surface of the supporting leg receiving member is connected to the bolt fastening portion through the fixing bolt and nut. Preferably, it is fixed to the part.

With this configuration, the outer circumferential surface of the housing receiving member and the inner circumferential surface of the support leg receiving member are connected to the bolt fastening portion provided along the longitudinal direction of the rotating shaft via a plurality of fixing bolts and nuts. Can be fixed.

Further, in the present invention, it is preferable that the housing receiving member is divided along the circumferential direction of the rotating shaft, and adjacent pieces are connected to each other via a connecting bolt and a nut.

With this configuration, the housing receiving material can be fixed to the outer peripheral surface of the housing in a state where the divided housing receiving materials fixed to the housing are connected to each other.

In addition, in the present invention, the support leg is made of an extruded aluminum member, and a bolt fastening member having a bolt insertion hole along the longitudinal direction is fixed to the longitudinal end of the support leg, and the support leg receiving member is Preferably, the outer surface and the bolt fastening member are fixed by a fastening bolt passing through the bolt insertion hole and a nut threaded onto the fastening bolt. In this case, the bolt fastening member includes a main bolt fastening member having a plurality of bolt insertion portions fixed to the front of the support leg and the upper side of the left and right side surfaces adjacent to the front, and a main bolt fastening member that is fixed to the front of the support leg and adjacent to the back of the support leg. A pair of auxiliary bolt fastening members having the above-mentioned bolt insertion portions are preferably fixed to the lower portions of the left and right side surfaces.

With this configuration, with the bolt fastening member fixed to the longitudinal end of the support leg made of an extruded aluminum member, the support leg is brought into contact with the support leg receiving member, and the bolt fastening member provided on the bolt fastening member is The support leg can be fixed to the support leg receiving member by a bolt and nut that pass through the bolt insertion portion. In this case, the bolt fastening members are comprised of a main bolt fastening member having a plurality of bolt insertion portions, which is fixed to the front of the support leg and the upper side of the left and right sides adjacent to the front, and a main bolt fastening member having a plurality of bolt insertion portions, which is fixed to the upper side of the left and right sides adjacent to the front of the support leg, and By using a pair of auxiliary bolt fastening members that are fixed to the lower side and have bolt insertion parts, the support leg receiving material and the upper side of the front side of the support leg, the left and right sides adjacent to the front side, and the back side of the support leg are adjacent to the support leg receiving material. The lower sides of the left and right sides can be fixed at multiple locations via bolts and nuts.

According to this invention, since it is configured as described above, the following effects can be obtained.
(1) According to the invention set forth in claim 1, the housing receiving member made of an extruded aluminum member and the support leg receiving member made of an extruded aluminum member fixed to the outer peripheral surface of the housing receiving member are provided. Since the support leg can be fixed to the bearing part, it is possible to easily and firmly assemble the support leg and the bearing part of the rotary shaft that connects the blades.

(2) According to the invention set forth in claim 2, since the housing and the housing receiving member can be fixed by fitting the concave line and the convex line, in addition to the above (1), the housing and the housing receiving member can be fixed. The support material can be easily and firmly assembled.

(3) According to the invention set forth in claim 3, the outer circumferential surface of the housing receiving member and the inner circumferential surface of the support leg receiving member are fixed to a plurality of bolt fastening portions provided along the longitudinal direction of the rotating shaft. Since they can be fixed via bolts and nuts, in addition to the above (1) and (2), it is possible to further strengthen the fixation between the housing receiving member and the support leg receiving member.

(4) According to the invention set forth in claim 4, since the housing receiving material can be fixed to the outer peripheral surface of the housing in a state in which the divided housing receiving materials fixed to the housing are connected, the housing receiving material can be fixed to the outer peripheral surface of the housing. ) and (2), the housing and the housing receiving member can be fixed easily and firmly.

(5) According to the invention set forth in claim 5, since the support leg can be fixed to the support leg receiving member by the fastening bolt and nut that pass through the bolt insertion portion provided in the bolt fastening member, the support leg can be fixed to the support leg receiving member. ) to (4), it is possible to further facilitate and firmly fix the support leg receiving member and the support leg.

(6) According to the invention set forth in claim 6, a plurality of supporting leg receiving members, the front side of the supporting leg, the upper side of the left and right side surfaces adjacent to the front side, and the lower side of the left and right side surfaces adjacent to the back side of the supporting leg are provided. Since it can be fixed via the fastening bolt and nut at the location, in addition to the above (5), it is possible to further strengthen the fixation between the support leg receiving member and the support leg.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view showing an example of a vertical axis wind turbine according to the present invention in use. It is a side view showing a part of the support leg fixing part of the above-mentioned vertical axis wind turbine in section. FIG. 3 is an enlarged side view of a main part showing a part of the support leg fixing part of the vertical axis wind turbine in cross section. FIG. 3 is a plan view of a blade fixing section of the vertical axis wind turbine. It is a side view (a), a top view (b), and a bottom view (c) of the rotating shaft in this invention. It is a side view (a) and a top view (b) of the wing in this invention. 4 is a cross-sectional view taken along line II in FIG. 3. FIG. 4 is a sectional view taken along line II-II in FIG. 3. FIG. FIG. 3 is a front view showing a main part of the support leg fixing part of the vertical axis wind turbine. It is a side view which shows the state which fixed the main bolt fastening member and the auxiliary bolt fastening member to the support leg in this invention. FIG. 7 is a sectional view showing a state in which the main bolt fastening member is fixed to the support leg. They are a top view (a) of a support leg fixing part of the above-mentioned vertical axis wind turbine, and (b) an enlarged sectional view of part A of (a). FIG. 3 is an exploded side view showing the mounting member of the housing and the bearing portion of the rotating shaft in the present invention. Front view (a), side view (b), sectional view (c) taken along line III-III in (a), and sectional view (d) taken along line IV-IV in (a) of the housing receiving material in this invention. It is. Front view (a), side view (b), sectional view (c) along line VV in (a), sectional view (d) along line VI-VI in (a) of the support leg receiving member in this invention ) and (e) is a sectional view taken along line VII-VII in (a). It is a top view which shows the fixed state of the housing and housing receiving member in this invention. It is a top view which shows the fixed state of the housing receiving member and support leg receiving member in this invention. It is a front view (a) and a top view (b) of the support leg in this invention. Section B arrow view in FIG. 15(b) (a), sectional view along the VIII-VIII line in FIG. 15(a) (b), and sectional view along the IX-IX line in FIG. 15(a) (c) It is.

Hereinafter, embodiments for carrying out the present invention will be described in detail based on the accompanying drawings.

As shown in FIG. 1, a vertical axis wind turbine 1 (hereinafter simply referred to as the wind turbine 1) according to the present invention rotates around an axis Z (hereinafter referred to as the vertical axis Z) perpendicular to the direction in which wind is received. A rotating shaft 2, a power generation unit 6 connected to the rotating shaft 2 via a bearing 3, and a plurality of (for example, three) wind turbine blades 10 (hereinafter referred to as three) connected to the rotating shaft 2 and rotating around a vertical axis Z. (referred to as wings 10).

The bearing part 3 is a part that becomes the base of the wind turbine 1. The bearing part 3 includes a cylindrical housing 3d that holds a bearing 3c that rotatably supports the rotating shaft 2, and a support leg 5 attached via a housing support member 40 and a support leg support member 50, which will be described later. It is installed at a predetermined height in order to position the blades 10 of the wind turbine 1 at a predetermined height from the installation surface 4. Note that a speed increaser 6a and a generator 6b, which constitute the power generation section 6, are connected to the rotating shaft 2 that protrudes below the bearing section 3.

The blade 10 is fixed to the rotating shaft 2 via a first bracket 20 fixed to the rotating shaft 2 and a second bracket 22 fixed to the first bracket 20. The wing 10 includes a pair of extension parts 11 extending from the rotating shaft 2 such that the distance between them becomes wider as the distance from the vertical axis Z increases, and a main wing 12 extending along a direction substantially parallel to the vertical axis Z of the wing 10. It has a curved portion 13 that connects the extension portion 11 and the main wing 12 in a curved manner by a connecting member (not shown). Specifically, the blade 10 is formed in a substantially triangular shape that is substantially symmetrical about the horizontal axis X when viewed from the side. Note that the term "substantially triangular" here refers to the overall shape of the wing 10 being close to a triangle, and includes a triangle with curved corners and a triangle with one of its three sides curved.

The wing 10 also includes a horizontally extending fixed arm 14 whose one end is fixed to the rotating shaft 2 via a first bracket 20 and a second bracket 22 and whose other end is connected to the main wing 12. The fixed arm 14 has a movable arm 15 that is rotatable around a horizontal axis X that connects the rotating shaft 2 and the main blade 10. An auxiliary blade 16 is provided for over-rotation suppression, which tilts the arm 15 around the horizontal axis and returns the movable arm 15 to its initial state when the wind turbine 1 stops rotating.

The extending portion 11, the main wing 12, the curved portion 13, the fixed arm 14, the movable arm 15, and the auxiliary wing 16 forming the wing 10 are made of extruded aluminum members having hollow portions 10a to 10g of the same cross-sectional shape. As shown in FIG. 5, it has a streamlined cross section with a curved front edge and a pointed rear edge, and has hollow portions 10a to 10d defined by a plurality of ribs 10e. In FIG. 5, the second hollow portion 10b from the front edge has flat upper and lower sides, and is formed into a rectangular shape with both ribs 10e. The upper and lower sides of this hollow portion 10b are formed thickly, and, for example, a plurality of mounting holes 10f through which fixing screws (not shown) pass are provided at locations where a wing bracket 30, which will be described later, is attached. There is. In this case, three sets of attachment holes 10f are provided in a plurality of rows in the longitudinal direction of the blade 10, each set being provided at three locations in the widthwise intermediate portion of the hollow portion 10b and on both sides thereof. Although FIG. 5 shows a case where the three ribs 10e have four

hollow parts

10a, 10b, 10c, and 10d, the shape and number of the hollow parts are arbitrary.

The first bracket 20 includes a plurality of (three) first brackets having protrusions 21a that fit into grooves 2a provided along the longitudinal direction at three equally divided locations on the outer peripheral surface of the rotating shaft 2. It is formed by the member 21. The first bracket member 21 is made of an extruded aluminum member. Note that a conductive rod insertion portion 21g is formed on the rotating shaft 2 side of the first bracket member 21 along the longitudinal direction.

An aluminum conductive rod 7 is inserted into the conductive rod insertion portion 21g, and is capable of contacting the stainless steel upper bearing receiver 3a of the bearing portion 3 located below. The reason why the conductive rod 7 is made of aluminum is that if the conductive rod 7 is made of a different metal than the first bracket member 21 with which it comes into contact, there is a risk that the first bracket member 21 will corrode due to the potential difference between different metals. be.

As shown in FIG. 4, the rotating shaft 2 includes a small-diameter shaft portion 2b to which the blade 10 is attached, a large-diameter shaft portion 2c housed in the bearing portion 3, and a portion between the small-diameter shaft portion 2b and the large-diameter shaft portion 2c. and an upper moving shaft portion 2d and a lower moving shaft portion 2e located below the large diameter shaft portion 2c and supported by a bearing 3c. A grooved line 2a is provided downward from the upper end of the outer circumferential surface of the small diameter shaft portion 2b, which is divided into three equal parts. In this case, the grooved line 2a is formed in a trapezoidal shape that widens toward the outer periphery. Note that an upper bearing receiver 3a is attached to the upper moving shaft portion 2d, and a lower bearing receiver 3b is attached to the lower moving shaft portion 2e. Note that the upper bearing receiver 3a and the lower bearing receiver 3b are formed of stainless steel members. Further, a screw hole 2f for attaching an eye bolt 2h is provided on the upper end surface of the small diameter shaft portion 2b.

As shown in FIG. 2, the second bracket 22 is fixed to the first bracket member 21 via bolts 23 and nuts 23a. The second bracket 22 includes a wing attachment piece 22d that extends at a predetermined angle in a direction approaching each other from the tip of a pair of upright pieces that stand up with flanges left on both sides in the width direction, and a wing attachment piece 22d that extends at a predetermined angle in a direction approaching each other. It is formed of an extruded aluminum member having a rotating shaft 2 connecting the ends thereof and a substantially parallel fixed arm mounting piece 22e.

The wing bracket 30 is made of an extruded aluminum section. As shown in FIG. 6A, the wing bracket 30 is inserted into the second hollow part 10b from the leading edge of the wing 10 (including the fixed arm 14), and is inserted into a mounting hole (not shown) provided in the wing 10. It is fixed by a fixing screw 17 passing through it.

The wing bracket 30 formed as described above is used to fix the wing 10 (specifically, the extension portion 11 and the fixed arm 14 that constitute the wing 10) in contact with the second bracket 22. . For example, a case where the wing 10 (fixed arm 14) is fixed to the second bracket 22 will be described with reference to FIGS. 3, 6A, and 6B. Here, in order to make the explanation easier to understand, the fixed arm 14 will be explained using the wing 10 as a representative. First, the wing bracket 30 is inserted into the hollow part 10b of the wing 10, and the wing bracket 30 is fixed in the hollow part 10b of the wing 10 (see FIG. 6A). Next, with the longitudinal end of the wing 10 in contact with the mounting surface of the fixed arm mounting piece 22e of the second bracket 22, insert the wing connecting bolt into the arm fixing screw hole 37 provided in the wing bracket 30. 24 to fix the wing 10 to the second bracket 22 (see FIG. 6B).

As shown in FIG. 10, the bearing section 3 includes

bearings

3c, 3c formed of tapered roller bearings that rotatably support a rotating shaft (not shown), and

bearings

3c, 3c at the upper and lower parts in the longitudinal direction. A cylindrical housing 3d that holds the housing 3d, and a stainless steel upper bearing that holds the

bearings

3c and 3c through an oil seal 3e and a gasket 3f, respectively, on the outside of the

bearings

3c and 3c held at the upper and lower parts of the housing 3d. It is equipped with a receiver 3g and a lower bearing receiver 3h.

On the outer peripheral surface of the housing 3d, grooves 3da extending along the longitudinal direction of the housing 3d are formed at three locations in the circumferential direction (see FIG. 9). Further, screw holes 3i are provided at appropriate intervals in the circumferential direction at the upper and lower ends of the housing 3d, and fixing bolts ( (not shown) are screwed into the screw holes 3i, thereby fixing the upper bearing receiver 3g and the lower bearing receiver 3h to the housing 3d.

On the outer peripheral surface of the housing 3d of the bearing part 3 configured as described above, a housing receiving member 40 divided into three along the longitudinal direction of the rotating shaft 2 so as to surround the housing 3d is provided with a grooved line 3da of the housing 3da. It is fixed by a connecting bolt 44 and a nut 44a in a state in which the protruding strip 41a is fitted into the ridge 41a (see FIG. 9). Further, a support leg receiving material 50 is fixed to the outer peripheral surface of the housing receiving material 40 along the circumferential direction of the rotating shaft 2 with fixing bolts 55 and nuts 55a, and the end surface of the supporting leg 5 is brought into contact with the supporting leg receiving material 50. Fixed state.

As shown in FIG. 11, the housing receiving member 40 includes an arcuate portion 41 that contacts the outer peripheral surface of the housing 3d and has a protrusion 41a on the inner surface that can fit into the groove 3da of the housing 3d; a pair of contact pieces 42 extending from both ends in the radial direction of the center of the rotating shaft 2; and a distal end surface of a hollow portion 43a on the distal end side extending outward from a bilaterally symmetrical portion in the middle of the arcuate portion 41. It is formed from an extruded aluminum member having a plurality of fastening holes 43 which are bolt fastening portions provided in the bolt fastening portion. In this case, a plurality of, for example, three fastening holes 43 are provided along the longitudinal direction of the rotating shaft 2 at appropriate intervals. Further, the width of the hollow portion 43a is set to such a width that a nut 55a, which will be described later and is arranged within the hollow portion 43a, does not rotate within the hollow portion 43a.

As shown in FIG. 13, the housing receiving member 40 formed in this way is brought into contact with the convex strip 41a fitting into the concave strip 3da of the housing 3d, and with the adjacent abutting pieces 42 in contact with each other. The housing receiving members 40 are connected to each other by a connecting bolt 44 and a nut 44a that pass through a mounting hole 45 provided in the piece 42. Thereby, the housing receiving member 40 can be firmly fixed to the outer peripheral surface of the housing 3d.

As shown in FIG. 12, the support leg receiving member 50 includes a fixed piece 51 that contacts the distal end surface of the fastening portion of the housing receiving member 40, and a flange portion 52a left at the upper end of the fixed piece 51 in the longitudinal direction. A leg fastening piece that has an inclined piece 53 extending downward, and a leg fastening piece that extends obliquely upward leaving a flange 52b at the lower end in the longitudinal direction of the fixed piece 51, and has a flange 52c on the tip side that intersects with the slanted piece 53. It is made of an extruded aluminum section having a diameter of 54.

As shown in FIGS. 2A and 14, the supporting leg receiving member 50 formed in this manner includes the

flanges

52a and 52b of the fixed piece 51, the mounting hole 56 provided on the lower side of the inclined piece 53, and the housing receiving member. It is fixed to the outer peripheral surface of the housing receiving member 40 by a fixing bolt 55 passing through the fastening hole 43 of 40 and a nut 55a disposed in the hollow portion 43a.

Further, the end portion of the support leg 5 is fixed to the leg fastening piece 54 of the support leg receiving member 50 in contact with it via a main bolt fastening member 61 and an auxiliary bolt fastening member 62, which will be described later. The support leg receiving member 50 and the support leg 5 are fixed by passing through

bolt insertion portions

64 and 67 provided in the main bolt fastening member 61 and the auxiliary bolt fastening member 62, which are fixed to the support leg 5 by a fixing bolt 65 and a nut 65a. The fastening bolt 69 is passed through the fastening hole 57 provided in the leg fastening piece 54 of the support leg receiving member 50, and the nut 69a is screwed and fixed.

As shown in FIGS. 15 and 16, the support leg 5 is formed of a substantially hexagonal cylindrical extruded aluminum profile, and has narrow opening grooves 5a on both sides adjacent to the front side. A plurality of mounting holes 5b are provided on four sides other than the side having the opening groove 5a.

The main bolt fastening member 61 includes a base portion 63 that comes into contact with the front side of the support leg 5 and the side having the narrow opening groove 5a, and bolts that protrude along the longitudinal direction at three locations on the center and both sides of the front side of the base portion 63. It is formed of an extruded aluminum member having an insertion portion 64. This main bolt fastening member 61 is fixed by a fixing bolt 65 and a nut 65a that pass through a mounting hole 5b provided in the support leg 5 and a mounting hole 63a provided in the main bolt fastening member 61, and is fixed by a fixing bolt 65 and a nut 65a that pass through a mounting hole 5b provided in the support leg 5 and a mounting hole 63a provided in the main bolt fastening member 61. The main bolt fastening member 61 is inserted therein and fixed by a fixing bolt 65 and nut 65a passing through a mounting hole 63a provided in the main bolt fastening member 61 (see FIG. 8A).

The auxiliary bolt fastening member 62 is made of aluminum and has a plate-shaped base 66 that comes into contact with the side adjacent to the back side of the support leg 5, and a bolt insertion part 67 that protrudes along the longitudinal direction at the center of the plate-shaped base 66. It is made of extruded material. The auxiliary bolt fastening member 62 passes through the mounting hole 5b provided in the support leg 5 and the mounting hole (not shown) provided in the auxiliary bolt fastening member 62 from the inside of the support leg 5 via the washer 68. It is fixed with bolts 65 and nuts 65a (see FIG. 8).

When fixing the support leg 5 to the support leg receiver 50, with the end of the support leg 5 in contact with the leg fixing piece 51 of the support leg receiver 50, Three bolt insertion parts 64 provided on the main bolt fastening member 61 fixed to the upper side of the side surface, and a pair of auxiliary bolt fastening members 62 fixed to the lower side of the left and right side surfaces adjacent to the back surface of the support leg 5. It is fixed by a fastening bolt 69 and a nut 69a passing through bolt insertion portions 67 provided in each. In this way, with the end of the support leg 5 in contact with the support leg receiving member 50, the front side of the support leg 5, the upper side of the left and right side surfaces adjacent to the front side, and the left and right side surfaces adjacent to the back side of the support leg 5 are By fixing six locations on the lower side with the fastening bolts 69 and nuts 69a, the support leg 5 and the support leg receiving member 50 can be firmly fixed.

As described above, the bearing portion 3 of the rotary shaft 2 to which the blades 10 are connected is held by the support legs 5 fixed at three locations in the circumferential direction of the rotary shaft 2. Note that in order to maintain the strength of the support legs 5, a brace 8 is connected to each support leg 5.

In the above embodiment, a case has been described in which the grooved line 3da is formed on the housing 3d, the protruding line 41a is formed on the housing receiving member 40, and the grooved line 3da and the protruding line 41a are fitted together. 3da and the protrusion 41a may be reversed. That is, a convex line extending along the longitudinal direction of the rotating shaft 2 may be formed on the housing 3d, and a concave line may be formed on the housing receiving member 40.

Furthermore, in the embodiment described above, the case where the bolt fastening portion provided in the housing receiving member 40 is formed by a plurality of fastening holes 43 provided in the distal end surface of the hollow portion 43a has been described, but instead of the fastening holes 43, , a narrow opening groove into which only the fixing bolt 55 can be inserted may be provided on the distal end surface of the hollow portion 43a.

Further, in the above embodiment, a case has been described in which the support leg 5 is formed into a substantially hexagonal cylindrical shape, but the shape of the support leg 5 is not limited to this. For example, the support leg 5 is formed into a substantially square cylindrical shape. It may be formed into In this case, the main bolt fastening member 61 is fixed to the front of the support leg 5 and the upper side of the left and right sides adjacent to the front, and the auxiliary bolt fastening member 62 is fixed to the lower side of the left and right sides adjacent to the back of the support leg 5. Then, in the same manner as described above, with the end of the support leg 5 in contact with the support leg receiving member 50, It can be fixed at six locations on the lower side of the left and right sides with fastening bolts 69 and nuts 69a.

Further, in the above embodiment, the case where there are three blades 10 has been described, but the number of blades 10 is not limited to this, and even when the number of blades 10 is five, the first bracket 20 This can be applied by changing the number of first bracket members 21 and second brackets 22.

According to the embodiment configured as described above, the housing receiving member 40 is made of an extruded aluminum member, and the support leg receiving member 50 is made of an extruded aluminum member that is fixed to the outer peripheral surface of the housing receiving member 40. By fixing the support leg 5 to the bearing part 3 via the support leg 5, the assembly of the support leg 5 and the bearing part 3 of the rotary shaft 2 that connects the blade 10 can be made easy and strong. When fixing the housing receiving material 40 to the housing 3d, the housing 3d and the housing receiving material 40 are fixed by fitting the concave strips 3da and the protruding strips 41a, thereby making it possible to further assemble the housing 3d and the housing receiving material 40. It can be made easy and strong.

Further, the outer circumferential surface of the housing receiving material 40 and the inner circumferential surface of the support leg receiving material 50 are connected to a plurality of bolts 44 and nuts 44a in a fastening hole 43 (bolt fastening portion) provided along the longitudinal direction of the rotating shaft 2. By fixing through the housing support member 40 and the support leg support member 50, the fixation can be strengthened.

Further, since the housing receiving material 40 can be fixed to the outer peripheral surface of the housing 3d while the divided housing receiving materials fixed to the housing 3d are connected, the housing 3d and the housing receiving material 40 can be easily fixed. It can be made stronger.

Further, with the end of the support leg 5 in contact with the leg fixing piece 51 of the support leg receiving member 50, a main bolt fastening member 61 is fixed to the front of the support leg 5 and the upper side of the left and right side surfaces adjacent to the front. It passes through three bolt insertion portions 64 provided in the support leg 5 and bolt insertion portions 67 provided in each of a pair of auxiliary bolt fastening members 62 fixed to the lower side of the left and right side surfaces adjacent to the back surface of the support leg 5. By fixing with the fastening bolt 69 and nut 69a, the support leg 5 and the support leg receiving member 50 can be firmly fixed.

Claims

A rotating shaft that rotates around an axis perpendicular to the direction in which the wind is received, a power generation unit that is connected to the rotating shaft via a bearing, and a plurality of blades that are connected to the rotating shaft and rotate around the vertical axis. A support leg fixing structure for a vertical axis wind turbine, comprising:
The bearing section has a cylindrical housing that holds a bearing that rotatably supports the rotating shaft along the longitudinal direction of the rotating shaft,
A housing receiving member made of an extruded aluminum member is fixed to the outer peripheral surface of the housing of the bearing part,
A support leg receiving member made of an extruded aluminum member is fixed to the outer peripheral surface of the housing receiving member along the circumferential direction of the rotating shaft,
The end surface of the support leg is fixed in contact with the outer surface of the support leg receiving member,
A support leg fixing structure for a vertical axis wind turbine.
The support leg fixing structure for a vertical axis wind turbine according to claim 1,
The housing and the housing receiving material are fixed by fitting a concave line along the longitudinal direction of the housing provided on one of the housing and the housing receiving material and a protruding line provided on the other side to each other. A support leg fixed structure for a vertical axis wind turbine.
The support leg fixing structure for a vertical axis wind turbine according to claim 1,
A bolt fastening portion is provided on the outer peripheral surface of the housing receiving member along the longitudinal direction of the rotating shaft, and the inner surface of the supporting leg receiving material is fixed to the bolt fastening portion via a fixing bolt and a nut. , a support leg fixing structure for a vertical axis wind turbine.
The support leg fixing structure for a vertical axis wind turbine according to any one of claims 1 to 3,
A supporting leg fixing structure for a vertical axis wind turbine, characterized in that the housing receiving member is divided along the circumferential direction of the rotating shaft, and adjacent pieces are connected to each other via a connecting bolt and a nut.
The support leg fixing structure for a vertical axis wind turbine according to claim 1 or 3,
The support leg is made of an extruded aluminum member, and a bolt fastening member having a bolt insertion hole along the longitudinal direction is fixed to the longitudinal end of the support leg, and the outer surface of the support leg receiving member and the bolt fastening member are fixed to the longitudinal end of the support leg. and are fixed by a fastening bolt passing through the bolt insertion hole and a nut threaded onto the fastening bolt.
The support leg fixing structure for a vertical axis wind turbine according to claim 5,
The bolt fastening member includes a main bolt fastening member having a plurality of bolt insertion portions fixed to the front side of the support leg and the upper side of the left and right side surfaces adjacent to the front side, and a main bolt fastening member having a plurality of bolt insertion portions, and a left and right side surface adjacent to the back surface of the support leg. A support leg fixing structure for a vertical axis wind turbine, comprising a pair of auxiliary bolt fastening members having the bolt insertion portions, which are fixed to the lower side of the vertical axis wind turbine.