Wind power generation equipment

Abstract

To provide a wind power generation system with an easily driveable turbine. [Solution] The wind power generation device (1) comprises a first member (10) that forms a first flow path (70) through which wind (W) flows from an inlet (71) to an outlet (72), a second member (20) positioned in the first flow path, and a third member (30) that forms a third flow path (90) through which air (A) that drives a turbine (40) for driving a generator (50) flows. The first member has a first opening (11a). The first flow path includes a throttling flow path (100) having a smaller flow path cross-sectional area (S) than the inlet. In the wind flow direction (F), the upstream end (21a) of the second member is positioned downstream (F2) of the inlet and upstream (F1) of the first opening. The throttling flow path is formed between the first member and the second member. The first flow path and the third flow path communicate with each other through the first opening.

Description

Technical Field

[0001] The present disclosure relates to a wind power generation device.

Background Art

[0002] Various technologies for wind power generation devices have been disclosed. For example, in the wind power generation device disclosed in Patent Document 1, a main windmill is supported rotatably about a rotation axis along the wind direction on a machine frame, and a main generator is driven by the rotation of the main windmill. The wind power generation device is provided with a nozzle surrounding the main windmill along the rotation axis center.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a wind power generation device, in order to efficiently generate electricity with a generator, it is necessary to make it easy to drive a turbine (windmill).

[0005] An object of the present disclosure is to provide a wind power generation device in which a turbine is easy to drive.

Means for Solving the Problems

[0006] A first aspect of this disclosure relates to a wind power generation device (1). This wind power generation device (1) comprises a first member (10) that forms a first flow path (70) through which wind (W) flows from an inlet (71) to an outlet (72), a second member (20) disposed in the first flow path (70), and a third member (30) that forms a third flow path (90) through which air (A) that drives a turbine (40) for driving a generator (50) flows, wherein the first member (10) has a first opening (11a), and the first flow path (70) is more than the inlet (71) The device includes a throttling channel (100) with a small channel cross-sectional area (S), and in the direction (F) of the airflow (W), the upstream end (21a) of the second member (20) is positioned downstream (F2) of the inlet (71) and upstream (F1) of the first opening (11a), the throttling channel (100) is formed between the first member (10) and the second member (20), and the first channel (70) and the third channel (90) communicate with each other through the first opening (11a).

[0007] According to the first embodiment, when wind (W) flows through the first flow path (70) from the inlet (71) to the outlet (72), the Venturi effect occurs in the throttling flow path (100), which has a smaller flow path cross-sectional area (S) than the inlet (71). Due to the Venturi effect, the pressure in the throttling flow path (100) is reduced.

[0008] Here, the first flow path (70) (in which the throttling flow path (100) is formed) and the third flow path (90) (through which the air (A) that drives the turbine (40) flows) are in communication via the first opening (11a).

[0009] When the pressure in the throttling passage (100) of the first passage (70) decreases, air (A) becomes more likely to flow into the third passage (90) which communicates with the first passage (70) via the first opening (11a).

[0010] The air (A) flowing through the third channel (90) makes it easier to drive the turbine (40) that drives the generator (50).

[0011] In summary, we can provide a wind power generation device (1) in which the turbine (40) is easy to drive.

[0012] A second aspect of this disclosure relates to a wind power generation device (1) according to the first aspect. In this wind power generation device (1), the first opening (11a) directly connects the first flow path (70) and the third flow path (90).

[0013] According to the second embodiment, it becomes easier to connect the first channel (70) and the third channel (90).

[0014] A third aspect of this disclosure relates to a wind power generation device (1) according to the second aspect. In this wind power generation device (1), the second member (20) has a first wall (21) that is convex on the upstream side (F1) in the flow direction (F), and the first wall (21) includes the upstream end (21a).

[0015] According to the third embodiment, the wind (W) from the inlet (71) can be guided along the convex shape toward the upstream side (F1) of the first wall (21) of the second member (20) and flow smoothly into the throttling channel (100).

[0016] A fourth aspect of this disclosure relates to a wind power generation device (1) according to the first aspect. In this wind power generation device (1), the second member (20) is cylindrical in shape, forming a second flow path (80) inside (20a), the second member (20) has a second opening (23), the first opening (11a) connects the second flow path (80) and the third flow path (90), and the second opening (23) connects the first flow path (70) and the second flow path (80).

[0017] According to the fourth aspect, the first opening (11a) can indirectly connect the first flow path (70) and the third flow path (90) via the second opening (23) and the second flow path (80).

[0018] A fifth aspect of this disclosure relates to a wind power generation device (1) according to the fourth aspect. In this wind power generation device (1), in the flow direction (F), the downstream end (22a) of the second member (20) is located downstream (F2) of the first opening (11a), and the second member (20) includes a first wall (21) which is convex on the upstream side (F1) in the flow direction (F), and a second wall (22) which is located downstream (F2) of the first wall (21) in the flow direction (F) and is convex on the downstream side (F2), the first wall (21) includes the upstream end (21a), and the second wall (22) includes the downstream end (22a).

[0019] According to the fifth embodiment, the air (W) flowing out from the throttling channel (100) can be smoothly directed to the outlet (72) along the convex shape toward the downstream side (F2) of the second wall (22) of the second member (20).

[0020] A sixth aspect of the present disclosure relates to a wind power generation device (1) according to any one of the first to fifth aspects. In this wind power generation device (1), the first flow path (70) includes an upstream flow path (110), the upstream flow path (110) is formed between the inlet (71) and the second member (20) in the flow direction (F), and the upstream flow path (110) is formed such that the cross-sectional area (S) of the flow path decreases as it moves from the upstream side (F1) to the downstream side (F2) in the flow direction (F).

[0021] According to the sixth embodiment, the Venturi effect can also be generated in the upstream flow path (110) before it reaches the throttling flow path (100) from the inlet (71).

[0022] A seventh aspect of this disclosure relates to a wind power generation device (1) according to any one of the first to sixth aspects. In this wind power generation device (1), the inlet (71) has a larger flow path cross-sectional area (S) than the outlet (72).

[0023] According to the seventh aspect, by enlarging the inlet (71), the difference in the flow path cross-sectional area (S) between the inlet (71) and the throttle flow path (100) can be increased. When the wind (W) from the inlet (71) flows into the throttle flow path (100), the Venturi effect can be effectively generated.

Brief Description of the Drawings

[0024] [Figure 1] FIG. 1 shows a view of the wind power generation device (1) according to the first embodiment as seen from the right side. [Figure 2] FIG. 2 shows a view of the wind power generation device (1) according to the first embodiment as seen from the rear. [Figure 3] FIG. 3 shows a cross-sectional view of the wind power generation device (1) according to the first embodiment taken along line III. [Figure 4] FIG. 4 shows the flow of the wind (W) in the first flow path (70) in the wind power generation device (1) according to the first embodiment. [Figure 5] FIG. 5 shows the flow of the air (A) in the first flow path (70) and the third flow path (90) in the wind power generation device (1) according to the first embodiment. [Figure 6] FIG. 6 is a view corresponding to FIG. 3 for the wind power generation device (1) according to the second embodiment. [Figure 7] FIG. 7 is a view corresponding to FIG. 3 for the wind power generation device (1) according to the third embodiment. [Figure 8] FIG. 8 is a view corresponding to FIG. 5 for the wind power generation device (1) according to the third embodiment. [Figure 9] FIG. 9 shows a cross-sectional view of the first member (10) of the wind power generation device (1) according to the fourth embodiment as seen from the right side.

Modes for Carrying Out the Invention

[0025] The embodiments of this disclosure will be described in detail below with reference to the drawings. However, this disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of ​​this disclosure. Since the drawings are for conceptual explanation of this disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding.

[0026] <First Embodiment> The first embodiment will now be described. In the following description, with Figure 1 as the reference, left will be the rear, right the front, the back of the page will be the left, the front of the page will be the right, top will be the top, and bottom will be the bottom. The front-back direction, left-right direction, and up-down direction are all orthogonal to each other. The up-down direction is the vertical direction. The front-back direction and left-right direction are included in the horizontal direction.

[0027] (Wind power generation equipment) Figure 1 shows the wind turbine (1) viewed from the right. Figure 2 shows the wind turbine (1) viewed from the rear. Figure 3 shows the wind turbine (1) in cross-section along line III.

[0028] The wind power generation device (1) is located outdoors. As shown in Figure 1, the wind power generation device (1) comprises a first member (10), a second member (20), a third member (30), a turbine (40), a generator (50), a base (61), and a frame (62).

[0029] (First component) As shown in Figures 1 and 2, the first member (10) has a bottom wall (11), a left wall (12), and a right wall (13). The first member (10) is made of, for example, metal or resin. The bottom wall (11) is plate-shaped with the vertical direction as the thickness direction. The bottom wall (11) extends straight in the front-rear and left-right directions. The first member (10) has a first opening (11a). The first opening (11a) is provided in the bottom wall (11). In detail, the first opening (11a) is provided in the middle of the bottom wall (11) in the front-rear direction and in the middle of the left-right direction. The first opening (11a) penetrates the bottom wall (11) in the vertical direction. In this example, the first opening (11a) is circular in shape with a center (C) when viewed in the vertical direction.

[0030] The left wall (12) and the right wall (13) are generally plate-like with their thickness oriented roughly in the left-right direction. The left wall (12) and the right wall (13) extend in the front-back and up-down directions. The left wall (12) extends upward from the left end of the bottom wall (11). The right wall (13) extends upward from the right end of the bottom wall (11).

[0031] As shown in Figure 3, the left wall (12) and the right wall (13) face each other in the left-right direction at their midpoint in the front-to-back direction. The left wall (12) and the right wall (13) are curved inward in a convex arc in the left-right direction, so as to be convex toward the opposing wall. Specifically, the left wall (12) is curved in a convex arc to the right, so as to be convex toward the right wall (13). The right wall (13) is curved in a convex arc to the left, so as to be convex toward the left wall (12).

[0032] The first member (10) forms a first flow path (70) inside (10a). The inside (10a) is the space formed between the lower wall (11), the left wall (12), and the right wall (13) of the first member (10).

[0033] The first channel (70) includes an inlet (71), an outlet (72), a throttling channel (100), an upstream channel (110), and a downstream channel (120). The inlet (71) opens at the front end of the first channel (70). The outlet (72) opens at the rear end of the first channel (70).

[0034] In the first channel (70), wind (W) flows from the inlet (71) to the outlet (72). The wind (W) is the outdoor airflow (natural wind). The throttling channel (100), the upstream channel (110), and the downstream channel (120) will be described later. The direction of wind (W) flow (F) is from front to back and vice versa. The upstream side (F1) in the wind (W) flow direction (F) is the front. The downstream side (F2) in the wind (W) flow direction (F) is the back.

[0035] The inner surface (14) of the first member (10) guides the wind (W) flowing through the first channel (70) from the inlet (71) to the outlet (72). The first channel (70) is a channel through which the wind (W) is guided by the inner surface (14) of the first member (10).

[0036] (Second component) As shown in Figures 1 and 3, the second member (20) is positioned in the first flow channel (70) inside (10a) of the first member (10). The second member (20) has a first wall (21).

[0037] The first wall (21) is convex on the upstream side (F1) in the wind (W) flow direction (F). The first wall (21) is an arc shape that is convex on the upstream side (F1).

[0038] The first wall (21) of the second member (20) includes an upstream end (21a). The upstream end (21a) is the upstream end (F1) of the second member (20) in the wind (W) flow direction (F). The upstream end (21a) is also the top of the first wall (21) (convex to the upstream side (F1)).

[0039] In the wind (W) flow direction (F), the upstream end (21a) of the first wall (21) of the second member (20) is positioned downstream (F2) of the inlet (71). In the wind (W) flow direction (F), the upstream end (21a) of the first wall (21) of the second member (20) is positioned upstream (F1) of the first opening (11a).

[0040] The first wall (21) of the second member (20) includes two base ends (21b). The base ends (21b) are the downstream (F2) ends of the second member (20) in the wind (W) flow direction (F). The two base ends (21b) face each other with a gap between them in the left-right direction. When viewed from above, a first opening (11a) is located between the two base ends (21b).

[0041] In the direction of wind flow (F) (W), the base end (21b) of the first wall (21) of the second member (20) is positioned downstream (F2) of the center (C) of the first opening (11a).

[0042] The first wall (21) of the second member (20) overlaps the upstream half (F1) of the first opening (11a) when viewed in a direction perpendicular to the flow direction (F).

[0043] The first wall (21) of the second member (20) extends in the left-right direction so as to cover the left end to the right end of the first opening (11a). The first wall (21) of the second member (20) extends in the vertical direction from the lower end of the first flow path (70) (the upper surface of the lower wall (11)) to the upper end of the first flow path (70) (corresponding to the upper ends of the left wall (12) and the right wall (13)).

[0044] (Third member) As shown in Figure 1, the third member (30) is positioned below the lower wall (11) of the first member (10). The third member (30) is connected to the lower surface of the lower wall (11). The third member (30) is a duct. The third member (30) extends in the vertical direction. The opening at the upper end of the third member (30) is connected to the first opening (11a) of the lower wall (11) of the first member (10). A gap is formed between the lower end of the third member (30) and the base (61), which will be described later. The inlet hole (31), which is the opening at the lower end of the third member (30), faces the base (61).

[0045] The third member (30) forms a third flow path (90) inside (30a). The inside (30a) is the internal space of the third member (30).

[0046] The first channel (70) and the third channel (90) are in communication with each other via the first opening (11a). The first opening (11a) connects the first channel (70) and the third channel (90). More specifically, the first opening (11a) directly connects the first channel (70) and the third channel (90). Air (A) flows through the third channel (90). The air (A) flows through the third channel (90) from bottom to top.

[0047] (turbine) As shown in Figure 1, the turbine (40) is located in the third flow path (90) inside the third member (30a). The turbine (40) is an impeller. The turbine (40) is rotated and driven by the air (A) flowing through the third flow path (90). The air (A) flowing through the third flow path (90) drives the turbine (40).

[0048] (Generator) As shown in Figure 1, the generator (50) is located in the third flow path (90) inside (30a) of the third member (30). The generator (50) is located above the turbine (40). The generator (50) is fixed to the inner surface of the third member (30) by a fixing member (51). The input shaft of the generator (50) is connected to the turbine (40). The generator (50) is driven by the rotation of the turbine (40). When the generator (50) is driven, electricity is generated and power is produced. The air (A) flowing through the third flow path (90) drives the turbine (40) which drives the generator (50).

[0049] (Base and mounting frame) As shown in Figure 1, the base (61) is installed on the ground. The base (61) is plate-shaped with its thickness in the vertical direction. The base (61) extends in the front-to-back and left-to-right directions. The upper surface of the base (61) faces the inlet hole (31) at the lower end of the third member (30).

[0050] As shown in Figure 1, the support frame (62) is positioned between the base (61) and the first member (10). The support frame (62) includes a plurality of support members (62a). The support members (62a) extend vertically between the base (61) and the first member (10). The support frame (62) supports the first member (10) with respect to the base (61).

[0051] (Constricted channel, upstream channel, and downstream channel) As shown in Figure 3, the first channel (70) includes a throttling channel (100), an upstream channel (110), and a downstream channel (120).

[0052] The throttling channel (100) is formed between the inlet (71) and the outlet (72) in the direction (F) of the airflow (W). The throttling channel (100) is formed downstream (F2) of the inlet (71) and upstream (F1) of the outlet (72) in the direction (F) of the airflow (W). The throttling channel (100) is formed between the inner surface (14) of the first member (10) and the outer surface (24) of the second member (20).

[0053] The inner surface (14) of the first member (10) includes a first inner surface (14a) and a second inner surface (14b). The first inner surface (14a) is located on the left wall (12). The second inner surface (14b) is located on the right wall (13). The first inner surface (14a) is located on the opposite side of the second member (20) from the second inner surface (14b). The second inner surface (14b) is located on the opposite side of the second member (20) from the first inner surface (14a).

[0054] The outer surface (24) of the second member (20) includes a first outer surface (24a) and a second outer surface (24b). The first outer surface (24a) faces the first inner surface (14a). The second outer surface (24b) faces the second inner surface (14b).

[0055] There are two aperture channels (100). The aperture channel (100) includes a first aperture channel (101) and a second aperture channel (102). The first aperture channel (101) is formed between the first inner surface (14a) and the first outer surface (24a). The second aperture channel (102) is formed between the second inner surface (14b) and the second outer surface (24b).

[0056] The diaphragm channel (100) has a smaller channel cross-sectional area (S) than the inlet (71). The diaphragm channel (100) has a smaller channel cross-sectional area (S) than the outlet (72). The channel cross-sectional area (S) is the area of ​​the cross section perpendicular to the airflow direction (F) of the first channel (70). The diaphragm channel (100) has a smaller channel width (H) in the left-right direction than the inlet (71) and the outlet (72).

[0057] The aperture cross-sectional area (Sc) of the aperture channel (100) is smaller than the inlet cross-sectional area (Sa) of the inlet (71) and the outlet cross-sectional area (Sb) of the outlet (72). The first aperture cross-sectional area (Sc1) of the first aperture channel (101) is smaller than the inlet cross-sectional area (Sa) of the inlet (71) and the outlet cross-sectional area (Sb) of the outlet (72). The second aperture cross-sectional area (Sc2) of the second aperture channel (102) is smaller than the inlet cross-sectional area (Sa) of the inlet (71) and the outlet cross-sectional area (Sb) of the outlet (72).

[0058] The inlet (71) has a larger flow path cross-sectional area (S) than the outlet (72). More specifically, the inlet cross-sectional area (Sa) of the inlet (71) is larger than the outlet cross-sectional area (Sb) of the outlet (72). The inlet (71) has a larger flow path width (H) in the lateral direction than the outlet (72).

[0059] The upstream channel (110) is formed between the inlet (71) and the upstream end (21a) of the second member (20) in the wind (W) flow direction (F). The upstream channel (110) is formed downstream of the inlet (71) (F2) and upstream of the upstream end (21a) of the second member (20) (F1) in the wind (W) flow direction (F).

[0060] The upstream channel (110) is formed such that the channel cross-sectional area (S) decreases as you move from the upstream side (F1) to the downstream side (F2) in the wind (W) flow direction (F). More specifically, the upstream channel (110) is formed such that the channel width (H) in the left-right direction decreases as you move from the upstream side (F1) to the downstream side (F2) in the wind (W) flow direction (F).

[0061] The upstream channel (110) has a larger channel cross-sectional area (S) than the aperture channel (100). The upstream cross-sectional area (Sd) of the upstream channel (110) is larger than the aperture cross-sectional area (Sc) of the aperture channel (100). More specifically, the upstream cross-sectional area (Sd) of the upstream channel (110) is larger than the first aperture cross-sectional area (Sc1) of the first aperture channel (101). The upstream cross-sectional area (Sd) of the upstream channel (110) is larger than the second aperture cross-sectional area (Sc2) of the second aperture channel (102).

[0062] The downstream channel (120) is formed between the outlet (72) and the base end (21b) of the second member (20) in the wind (W) flow direction (F). The downstream channel (120) is formed upstream (F1) of the outlet (72) and downstream (F2) of the base end (21b) of the second member (20) in the wind (W) flow direction (F).

[0063] The downstream channel (120) is formed such that the channel cross-sectional area (S) increases as you move from the upstream side (F1) to the downstream side (F2) in the wind (W) flow direction (F). More specifically, the downstream channel (120) is formed such that the channel width (H) in the left-right direction increases as you move from the upstream side (F1) to the downstream side (F2) in the wind (W) flow direction (F).

[0064] The downstream channel (120) has a larger channel cross-sectional area (S) than the aperture channel (100). The downstream cross-sectional area (Se) of the downstream channel (120) is larger than the aperture cross-sectional area (Sc) of the aperture channel (100). More specifically, the downstream cross-sectional area (Se) of the downstream channel (120) is larger than the first aperture cross-sectional area (Sc1) of the first aperture channel (101). The downstream cross-sectional area (Se) of the downstream channel (120) is larger than the second aperture cross-sectional area (Sc2) of the second aperture channel (102).

[0065] (Attraction of air due to the Venturi effect) Figure 4 shows the flow of wind (W) in the first channel (70). Figure 5 shows the flow of air (A) in the first channel (70) and the third channel (90). In Figure 5, a portion is shown in cross-section. When wind (W) flows through the first channel (70) from the inlet (71) to the outlet (72), the Venturi effect occurs in the throttling channel (100). Due to the Venturi effect, the pressure (P) in the throttling channel (100) decreases.

[0066] The Venturi effect is derived from the continuity equation [Equation 1] and Bernoulli's theorem [Equation 2]. In equation [Equation 1], S is the cross-sectional area of ​​the flow path, and V is the velocity (wind speed) of the wind (W). In equation [Equation 2], ρ is the density, and P is the pressure. Although the air that makes up the wind (W) is not strictly an incompressible fluid, it can be treated as an incompressible fluid if the flow velocity (V) is on the order of wind speed. The continuity equation [Equation 1] can be applied, and the density (ρ) can be considered constant in Bernoulli's theorem [Equation 2].

[0067]

number

[0068]

number

[0069] According to the continuity equation [Equation 1], as the cross-sectional area of ​​the flow path (S) decreases, the flow velocity (V) increases. According to Bernoulli's theorem [Equation 2], as the flow velocity (V) increases, the pressure (P) decreases.

[0070] When wind (W) flows through the condensed channel (100), the pressure (P) in the condensed channel (100), which has a small cross-sectional area (S), decreases. Specifically, the pressure (P) in the condensed channel (100) becomes negative pressure. Negative pressure is lower than atmospheric pressure.

[0071] When the pressure (P) in the throttling passage (100) decreases (more specifically, becomes negative), the outside air (A) flows into the third passage (90) inside the third member (30a) through the inlet hole (31) at the lower end of the third member (30). After the air (A) flows upward through the third passage (90), it flows into the first passage (70) inside the first member (10a) through the first opening (11a) in the lower wall (11) of the first member (10).

[0072] Outdoor air (A) is drawn into the third channel (90) and flows through the third channel (90) because the pressure (P) in the throttling channel (100) in the first channel (70) decreases (more specifically, becomes negative pressure).

[0073] The turbine (40) is driven by the air (A) flowing through the third channel (90). The air (A) flowing through the third channel (90) drives the turbine (40) (for driving the generator (50)). The generator (50) is driven by the rotation of the turbine (40).

[0074] (Effects and Benefits) When wind (W) flows through the first channel (70) from the inlet (71) to the outlet (72), the Venturi effect occurs in the throttled channel (100), which has a smaller channel cross-sectional area (S) than the inlet (71). Due to the Venturi effect, the pressure in the throttled channel (100) decreases.

[0075] Here, the first flow path (70) (in which the throttling flow path (100) is formed) and the third flow path (90) (through which the air (A) that drives the turbine (40) flows) are in communication with each other via the first opening (11a).

[0076] When the pressure in the throttling passage (100) of the first passage (70) decreases, air (A) becomes more likely to flow into the third passage (90) which communicates with the first passage (70) via the first opening (11a).

[0077] The air (A) flowing through the third channel (90) makes it easier to drive the turbine (40) that drives the generator (50).

[0078] In summary, we can provide a wind power generation device (1) in which the turbine (40) is easy to drive.

[0079] In particular, in the direction (F) of the airflow (W), the upstream end (21a) of the second member (20) is positioned downstream (F2) of the inlet (71). When the airflow (W) flows from the upstream flow path (110) (formed between the inlet (71) and the upstream end (21a) of the second member (20)) into the throttling flow path (100) (formed between the inner surface (14) of the first member (10) and the outer surface (24) of the second member (20)), a rapid change in the flow path cross-sectional area (S) occurs, resulting in a significant Venturi effect.

[0080] By arranging the second member (20) in the first flow path (70) inside (10a) of the first member (10), it becomes easier to form the throttling flow path (100) between the inner surface (14) of the first member (10) and the outer surface (24) of the second member (20).

[0081] The first opening (11a) directly connects the first channel (70) and the third channel (90). This facilitates the connection between the first channel (70) and the third channel (90).

[0082] The airflow (W) from the inlet (71) can be guided along the convex shape toward the upstream side (F1) of the first wall (21) of the second member (20) and smoothly flow into the constricted flow path (100).

[0083] The Venturi effect can also be generated in the upstream channel (110) before it reaches the throttling channel (100) from the inlet (71).

[0084] By increasing the size of the inlet (71), the difference in the cross-sectional area (S) of the flow path between the inlet (71) and the throttled flow path (100) can be increased. When the air (W) from the inlet (71) flows into the throttled flow path (100), the Venturi effect can be effectively generated.

[0085] <Second Embodiment> A second embodiment will now be described. In the following description, components similar to those in the above embodiment will be denoted by the same reference numerals, and detailed descriptions will be omitted. Figure 6 is equivalent to Figure 3.

[0086] The first member (10) includes a membrane (15) and a plurality of supports (16). The membrane (15) and the plurality of supports (16) constitute the left wall (12) and the right wall (13).

[0087] The membrane (15) extends from the inlet (71) side to the outlet (72) side. The membrane (15) is made of, for example, resin.

[0088] Multiple supports (16) are fixed to the membrane (15). The multiple supports (16) are arranged in a line with spacing between them, from the inlet (71) side to the outlet (72) side. The supports (16) are made of metal. The supports (16) are, for example, made of tubes extending in the vertical direction. The supports (16) are, for example, aluminum tubes.

[0089] The other configurations are the same as in the first embodiment.

[0090] The weight of the first component (10) can be reduced.

[0091] <Third Embodiment> A third embodiment will now be described. In the following description, components similar to those in the above embodiments will be denoted by the same reference numerals, and detailed descriptions will be omitted. Figure 7 is equivalent to Figure 3. Figure 8 is equivalent to Figure 5.

[0092] The second member (20) is positioned in the first flow path (70) inside (10a) of the first member (10).

[0093] The second member (20) has a first wall (21) and a second wall (22). The second member (20) is divided into the first wall (21) and the second wall (22).

[0094] The first wall (21) is convex on the upstream side (F1) in the wind (W) flow direction (F). The first wall (21) is an arc shape that is convex on the upstream side (F1).

[0095] The first wall (21) of the second member (20) includes an upstream end (21a). The upstream end (21a) is the upstream end (F1) of the first wall (21) of the second member (20) in the wind (W) flow direction (F). The upstream end (21a) is also the top of the first wall (21) (convex to the upstream side (F1)).

[0096] In the wind (W) flow direction (F), the upstream end (21a) of the first wall (21) of the second member (20) is positioned downstream (F2) of the inlet (71). In the wind (W) flow direction (F), the upstream end (21a) of the first wall (21) of the second member (20) is positioned upstream (F1) of the first opening (11a).

[0097] The first wall (21) of the second member (20) includes two base ends (21b). The base ends (21b) are the downstream (F2) ends of the first wall (21) of the second member (20) in the wind (W) flow direction (F). The two base ends (21b) face each other with a gap between them in the left-right direction. When viewed from above, a first opening (11a) is located between the two base ends (21b).

[0098] The second wall (22) is convex on the downstream side (F2) in the wind (W) flow direction (F). The second wall (22) is an arc shape that is convex on the downstream side (F2).

[0099] The second wall (22) of the second member (20) includes a downstream end (22a). The downstream end (22a) is the downstream end (F2) of the second wall (22) of the second member (20) in the wind (W) flow direction (F). The downstream end (22a) is also the top of the second wall (22) (convex to the downstream side (F2)).

[0100] In the wind (W) flow direction (F), the downstream end (22a) of the second wall (22) of the second member (20) is positioned upstream (F1) of the outlet (72). In the wind (W) flow direction (F), the downstream end (22a) of the second wall (22) of the second member (20) is positioned downstream (F2) of the first opening (11a).

[0101] The second wall (22) of the second member (20) includes two base ends (22b). The base ends (22b) are the upstream (F1) ends of the second wall (22) of the second member (20) in the wind (W) flow direction (F). The two base ends (22b) face each other with a gap between them in the left-right direction. When viewed from above, a first opening (11a) is located between the two base ends (22b).

[0102] The second wall (22) is mirror-symmetric with respect to the center (C) of the first opening (11a) in the wind (W) flow direction (F). The second wall (22) is positioned downstream (F2) of the first wall (21) in the wind (W) flow direction (F). The first wall (21) is positioned upstream (F1) of the second wall (22) in the wind (W) flow direction (F).

[0103] The second member (20) is cylindrical when the first wall (21) and the second wall (22) are joined together. For example, when the first wall (21) and the second wall (22) of the second member (20) are joined together, it becomes an ellipse shape (viewed vertically) with its major axis extending in the flow direction (F).

[0104] The second member (20) forms a second flow path (80) inside (20a). The inside (20a) is the space formed between the first wall (21) and the second wall (22). The inner surfaces of the first wall (21) and the second wall (22) in the second member (20) guide air (A) from bottom to top. The second flow path (80) is a flow path through which air (A) is guided by the inner surfaces of the first wall (21) and the second wall (22) in the second member (20).

[0105] The second member (20) has a second opening (23), which is formed in the gap between the first wall (21) and the second wall (22). More specifically, the second opening (23) is provided in the gap between the downstream base end (21b) of the first wall (21) (F2) and the upstream base end (22b) of the second wall (22). The second opening (23) extends in the vertical direction.

[0106] The first opening (11a) connects the second flow path (80) and the third flow path (90). The second opening (23) connects the first flow path (70) and the second flow path (80). The first opening (11a) indirectly connects the first flow path (70) and the third flow path (90) via the second opening (23) and the second flow path (80).

[0107] The second opening (23) is open in a direction (G) that intersects the wind (W) flow direction (F). In this example, the direction (G) is perpendicular to the flow direction (F).

[0108] In the second member (20), the second opening (23) includes a second left opening (23a) and a second right opening (23b). The second left opening (23a) faces the left wall (12). The second right opening (23b) faces the right wall (13).

[0109] The aperture channel (100) is formed between the inner surface (14) of the first member (10) and the outer surface (24) of the second member (20). The second opening (23) of the second member (20) opens into the aperture channel (100). The second left opening (23a) opens into the first aperture channel (101). The second right opening (23b) opens into the second aperture channel (102).

[0110] The aperture channel (100) has a minimum section (100a) where the channel cross-sectional area (S) is minimized. The second opening (23) opens into the minimum section (100a) of the aperture channel (100) where the channel cross-sectional area (S) is minimized. At the minimum section (100a), the width of the channel in the left-right direction of the aperture channel (100) is minimized.

[0111] The second left opening (23a) opens at the first minimum portion (101a) in the first aperture flow path (101) where the first flow path cross-sectional area (S1) is minimized. The second right opening (23b) opens at the second minimum portion (102a) in the second aperture flow path (102) where the second flow path cross-sectional area (S2) is minimized.

[0112] Air (A) flows out from the second opening (23) into the throttling passage (100) in a direction (G) that intersects with the wind (W) flow direction (F). Air (A) flows out from the second opening (23) into the smallest part (100a) of the throttling passage (100).

[0113] The other configurations are the same as in the first embodiment.

[0114] The same effects as in the first embodiment can be obtained.

[0115] The first opening (11a) can indirectly connect the first channel (70) and the third channel (90) via the second opening (23) and the second channel (80).

[0116] The airflow (W) from the throttling channel (100) can be smoothly directed to the outlet (72) along the convex shape toward the downstream side (F2) of the second wall (22) of the second member (20).

[0117] In the direction (F) of the airflow (W) through the first channel (70), not only is the upstream side (F1) of the second channel (80) closed by the first wall (21), but the downstream side (F2) of the second channel (80) is also closed by the second wall (22). This makes it easier for air (A) to flow through the second channel (80).

[0118] By providing the second opening (23) between the first wall (21) and the second wall (22) of the second member (20), the second opening (23) can be easily provided in the second member (20).

[0119] The second opening (23) opens in a direction (G) that intersects the airflow direction (F) of the airflow (W). This makes it easier to direct the second opening (23) towards the throttling flow path (100).

[0120] The second opening (23) opens at the smallest part (100a) in the throttling flow path (100) where the flow path cross-sectional area (S) is minimized.

[0121] <Fourth Embodiment> A fourth embodiment will now be described. In the following description, components similar to those in the above embodiments will be denoted by the same reference numerals, and detailed explanations will be omitted. Figure 9 shows a cross-sectional view of the first member (10) as seen from the right.

[0122] The first member (10) has a lower wall (11), an upper wall (17), a left wall (12), and a right wall (13). The lower wall (11) and the upper wall (17) are generally plate-like with the vertical direction as the thickness direction. The lower wall (11) and the upper wall (17) extend in the front-rear direction and the left-right direction. The lower wall (11) and the upper wall (17) face each other in the vertical direction at their intermediate points in the front-rear direction.

[0123] The lower wall (11) and the upper wall (17) are curved in an arc shape that is convex inward in the vertical direction, so as to be convex toward the opposing side. Specifically, the lower wall (11) is curved in an arc shape that is convex upward toward the upper wall (17). The upper wall (17) is curved in an arc shape that is convex downward toward the lower wall (11). The first opening (11a) is provided in the lower wall (11).

[0124] The left wall (12) and the right wall (13) extend parallel to each other, straight in the front-to-back and up-to-down directions.

[0125] The upstream channel (110) is formed such that the channel cross-sectional area (S) decreases as you move from the upstream side (F1) to the downstream side (F2) in the wind (W) flow direction (F). More specifically, the upstream channel (110) is formed such that the vertical channel width decreases as you move from the upstream side (F1) to the downstream side (F2) in the wind (W) flow direction (F).

[0126] The downstream channel (120) is formed such that the channel cross-sectional area (S) increases as you move from the upstream side (F1) to the downstream side (F2) in the wind (W) flow direction (F). More specifically, the downstream channel (120) is formed such that the vertical channel width increases as you move from the upstream side (F1) to the downstream side (F2) in the wind (W) flow direction (F).

[0127] The other configurations are the same as in the first embodiment.

[0128] <Other Embodiments> The first opening (11a) is not limited to a circular shape, but may also be a polygon (for example, a quadrilateral).

[0129] In the wind (W) flow direction (F), the base end (21b) of the first wall (21) of the second member (20) may be positioned upstream (F1) of the center (C) of the first opening (11a), rather than downstream (F2) of the center (C) of the first opening (11a).

[0130] There may be only one aperture channel (100). For example, if the second member (20) is fixed to the right wall (13), the aperture channel (100) includes only the first aperture channel (101) and does not include the second aperture channel (102).

[0131] The first wall (21) does not have to be convex; it may be flat. The first wall (21) does not have to be arc-shaped; it may be polygonal (for example, quadrilateral). The same applies to the second wall (22).

[0132] The intersecting direction (G) does not have to be perpendicular to the wind (W) flow direction (F), but may intersect it at an angle.

[0133] In the above embodiment, the turbine (40) is provided in the third flow path (90), but is not limited thereto. The turbine (40) may be provided in the second flow path (80). Alternatively, the turbine (40) may be provided outside the second flow path (80) and outside the third flow path (90) (for example, below the inlet hole (31) of the third flow path (90) and above the base (61)). The air (A) for driving the turbine (40) must flow into the third flow path (90). The same applies to the generator (50). Furthermore, the turbine (40) and the generator (50) may be located in different places from each other.

[0134] In the first member (10), the lower wall (11), upper wall (17), left wall (12), and right wall (13) may all be curved. The first member (10) may also be trumpet-shaped.

[0135] The first member (10) may be a duct. The first member (10) may also be circular in shape.

[0136] The second member (20), when the first wall (21) and the second wall (22) are joined together, does not have to be elliptical in shape; for example, it may be a perfect circle or a polygon (for example, a quadrilateral).

[0137] The second member (20) may be a structure in which the first wall (21) and the second wall (22) are integrated. The integrated second member (20) may be, for example, a duct. The second opening (23) may be a hole made in the integrated second member (20).

[0138] The third component (30) does not have to be a duct.

[0139] The first member (10) may not extend straight horizontally, but rather diagonally to the horizontal or vertically. The second member (20) may not extend straight vertically, but rather diagonally to the vertical or horizontally. The third member (30) may not extend straight vertically, but rather diagonally to the vertical or horizontally. The first member (10), the second member (20), and the third member (30) may bend midway and change their direction of extension.

[0140] Although embodiments and modifications have been described above, it will be understood that various changes in form and details are possible without departing from the spirit and scope of the claims. Furthermore, elements of the above embodiments, modifications, and other embodiments may be combined or substituted as appropriate.

[0141] The designations "First," "Second," "Third," etc., in the specification and claims are used to distinguish between the terms to which these designations are attached, and do not limit the number or order of such terms. [Industrial applicability]

[0142] As described above, this disclosure is useful for wind power generation equipment. [Explanation of Symbols]

[0143] W Wind F flow direction F1 Upstream F2 Downstream A air S channel cross-sectional area 1. Wind power generation equipment 10 First Member 11a 1st opening 20 Second Member 21 1st wall 21a Upstream end 22 Second wall 22a Downstream end 23. Second opening 30 Third Member 40 Turbine 50 Generators 70 First channel 71 Entrance 72 Exit 80 Second channel 90 Third channel 100 aperture flow path 110 Upstream flow path

Claims

1. A first member (10) forms a first flow path (70) through which wind (W) flows from the inlet (71) to the outlet (72), The second member (20) is arranged in the first flow path (70), The device comprises a third member (30) that forms a third flow path (90) through which air (A) that drives a turbine (40) for driving a generator (50) flows, The first member (10) has a first opening (11a), The first flow path (70) includes a throttling flow path (100) having a smaller flow path cross-sectional area (S) than the inlet (71). In the flow direction (F) of the wind (W), the upstream end (21a) of the second member (20) is positioned downstream (F2) of the inlet (71) and upstream (F1) of the first opening (11a). The throttling channel (100) is formed between the first member (10) and the second member (20), A wind power generation device in which the first flow path (70) and the third flow path (90) are in communication through the first opening (11a).

2. The wind power generation apparatus according to claim 1, wherein the first opening (11a) directly connects the first flow path (70) and the third flow path (90).

3. The second member (20) has a convex first wall (21) on the upstream side (F1) in the flow direction (F), The wind power generation apparatus according to claim 2, wherein the first wall (21) includes the upstream end (21a).

4. The second member (20) is cylindrical in shape and forms a second flow path (80) inside (20a). The second member (20) has a second opening (23), The first opening (11a) connects the second flow path (80) and the third flow path (90), The wind power generation apparatus according to claim 1, wherein the second opening (23) connects the first flow path (70) and the second flow path (80).

5. In the flow direction (F), the downstream end (22a) of the second member (20) is positioned downstream (F2) of the first opening (11a). The second member (20) includes a first wall (21) which is convex on the upstream side (F1) in the flow direction (F), and a second wall (22) which is positioned downstream (F2) of the first wall (21) in the flow direction (F) and is convex on the downstream side (F2), The first wall (21) includes the upstream end (21a), The wind power generation apparatus according to claim 4, wherein the second wall (22) includes the downstream end (22a).

6. The first channel (70) includes an upstream channel (110), The upstream channel (110) is formed between the inlet (71) and the second member (20) in the flow direction (F), The wind power generation apparatus according to any one of claims 1 to 5, wherein the upstream flow path (110) is formed such that the cross-sectional area (S) of the flow path decreases as it moves from the upstream side (F1) to the downstream side (F2) in the flow direction (F).

7. The wind power generation apparatus according to any one of claims 1 to 5, wherein the inlet (71) has a larger flow path cross-sectional area (S) than the outlet (72).

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