Wind power system

Abstract

The purpose of the present invention is to provide a wind power system comprising: a propeller installed inside a duct through which air is discharged, the propeller being rotated by the discharged air; a power generator that is axially connected to the propeller and converts rotational kinetic energy into electrical energy; and a control unit for controlling the power generator. The propeller comprises a first blade part and a second blade part, which have a double-blade structure, and a blade rotation shaft. The first blade part is disposed perpendicular to the second blade part with respect to the blade rotation shaft, and is coupled so as to partially overlap the second blade part in the longitudinal direction of the blade rotation shaft.

Description

wind power generation system

[0001] The present invention relates to a wind power generation system, and more particularly, to a wind power generation system capable of producing electrical energy from exhausted fluid by installing a generator inside an air conditioning duct.

[0002]

[0003] Large, high-rise buildings and factories where it is difficult to open windows are introducing air conditioning systems that can circulate the internal air to improve ventilation and indoor heating and cooling efficiency.

[0004] Air conditioning systems can keep indoor spaces comfortable by exhausting polluted indoor air to the outdoors through ducts or supplying fresh outdoor air to the indoors.

[0005] Air conditioners are equipped with exhaust devices that create exhaust pressure to exhaust indoor air outside the building or to bring outside air into the building.

[0006] These air conditioning ducts have the problem of not utilizing energy efficiently and causing waste because air with a certain exhaust pressure is simply discarded after performing the air conditioning function.

[0007]

[0008] The purpose of the present invention is to provide a wind power generation system that can generate electric energy by installing a wind power generator in an air conditioning duct and utilizing air having exhaust pressure formed therein.

[0009] In addition, the purpose is to provide a wind power generation system that can simultaneously perform air conditioning and power generation even in weak air currents because the propeller installed in the air conditioning duct does not obstruct the air flow.

[0010] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0011]

[0012] The above object is achieved by a wind power generation system including a propeller installed inside a duct through which air is discharged, a generator that is axially connected to the propeller and converts rotational kinetic energy into electrical energy, and a controller that controls the generator, wherein the propeller includes a first blade portion having a two-blade structure, a second blade portion, and a blade rotation axis, and the first blade portion is arranged perpendicular to the second blade portion with respect to the blade rotation axis, and a portion thereof is combined so as to overlap with the second blade portion based on the longitudinal direction of the blade rotation axis.

[0013] Additionally, the first blade portion may have a 2:1 ratio between a portion that does not overlap with the second blade portion and a portion that overlaps with it.

[0014] Additionally, the first blade portion and the second blade portion may each have blades that can be bent in the same direction.

[0015] In addition, the generator includes a generator rotation shaft, and the rotation shaft of the generator is connected to the blade rotation shaft by a gearbox, and the controller can control the gear ratio of the gearbox according to the rotation speed of the blade rotation shaft to control the rotation speed of the generator rotation shaft within a preset range.

[0016] In addition, the gearbox includes a first acceleration gear and a second acceleration gear that are arranged at a predetermined interval but have different gear ratios, and the controller can control the gearbox to disengage the engaged gears to prevent the rotation shaft of the generator from rotating in reverse.

[0017] Additionally, at least one of the blade rotation axis and the generator rotation axis may be provided with a reverse rotation prevention member so that it can rotate only in one direction.

[0018] In addition, the wind power generation system in which the duct is formed into an expansion-type structure that increases the width of the area in which the propeller is installed.

[0019] Additionally, the duct may include a diffuser that guides air flowing into the duct toward the propeller and a dust filter that removes floating matter contained in the air.

[0020]

[0021] According to a wind power generation system according to one embodiment of the present invention, there is an effect of efficiently operating an air conditioning system by converting air in which exhaust pressure is formed into electrical energy.

[0022]

[0023] FIG. 1 is a drawing schematically showing a wind power generation system according to one embodiment of the present invention.

[0024] Figure 2 is a drawing schematically showing a power generation unit included in the wind power generation system of Figure 1.

[0025] Fig. 3 is a side view of a propeller included in the power generation unit of Fig. 2.

[0026] Figure 4 is a drawing schematically showing a power generation unit according to another embodiment of the present invention.

[0027] FIG. 5 is a schematic drawing showing a gearbox according to one embodiment of the present invention.

[0028] Figure 6 is a drawing showing how the gearbox of Figure 5 operates.

[0029] Fig. 7 is a drawing showing the gears engaged in the gearbox of Fig. 5 being released.

[0030] FIG. 8 is a schematic drawing showing a gearbox according to another embodiment of the present invention.

[0031] FIG. 9 is a schematic drawing showing a wind power generation system according to another embodiment of the present invention.

[0032]

[0033] The embodiments described in this specification and the configurations illustrated in the drawings are merely preferred examples of the disclosed invention, and there may be various modified examples that can replace the embodiments and drawings of this specification at the time of filing of this application.

[0034] The same reference numbers or symbols used in each drawing of this specification represent parts or components that perform substantially the same functions. The shapes and sizes of elements in the drawings may be exaggerated for clarity.

[0035] The terminology used herein is for the purpose of describing embodiments and is not intended to limit and / or restrict the disclosed invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this specification, the terms "comprises" or "has" and the like are intended to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0036] While terms including ordinal numbers, such as "first," "second," etc., used herein may be used to describe various components, the components are not limited by these terms, and these terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, a first component could be referred to as a second component, and similarly, a second component could also be referred to as a first component.

[0037] Hereinafter, a wind power generation system according to one embodiment of the present invention will be described in detail with reference to the drawings.

[0038] FIG. 1 is a schematic drawing of a wind power generation system according to one embodiment of the present invention. FIG. 2 is a schematic drawing of a power generation unit included in the wind power generation system of FIG. 1. FIG. 3 is a side view of a propeller included in the power generation unit of FIG. 2. FIG. 4 is a schematic drawing of a power generation unit according to another embodiment of the present invention. FIG. 5 is a schematic drawing of a gearbox according to one embodiment of the present invention. FIG. 6 is a drawing showing the gearbox of FIG. 5 in operation. FIG. 7 is a drawing showing the engaged gears being released in the gearbox of FIG. 5. FIG. 8 is a schematic drawing of a gearbox according to another embodiment of the present invention. FIG. 9 is a schematic drawing of a wind power generation system according to another embodiment of the present invention.

[0039] Referring to FIGS. 1 and 2, the wind power generation system (10) includes a duct section (100), a power generation section (200), and a control section (300).

[0040] The duct section (100) serves as a passage through which air inside a building is discharged to the outside or outside air is introduced. The duct section (100) is equipped with an air conditioner to generate exhaust pressure in the air. Contaminated air inside the building can be discharged to the outside or fresh air from outside can be introduced into the inside. The duct section (100) may include a duct (120), a diffuser (140), and a dust collection filter (160).

[0041] The duct (120) is formed as a passage through which air flows inside. The duct (120) may be formed as a square or circular tube. The duct (120) is provided with a diffuser (140), a dust collecting filter (160), and a portion of a power generation unit (200) inside.

[0042] The diffuser (140) regulates the air flow within the duct (120). The diffuser (140) directs compressed air within a narrow range to flow in a certain direction. The diffuser (140) can guide the air flowing into the duct (120) toward the propeller. The diffuser (140) may be installed upstream of the duct (120) from the propeller, which will be described later.

[0043] The dust collection filter (160) filters fine dust or harmful substances contained in the air flowing inside the duct (120). The dust collection filter (160) can reduce noise generated inside the duct (120). The dust collection filter (160) can be installed in a location adjacent to the room inside the duct (120).

[0044] The power generation unit (200) produces electrical energy using air passing through a duct (120). The power generation unit (200) includes a propeller (220) and a generator (240).

[0045] A propeller (220) is installed inside a duct and rotates by air passing through the duct (120). The propeller (220) may be installed with its rotation axis perpendicular to the direction in which the airflow flows. The propeller (220) includes a blade rotation axis (222), a first blade portion (224), and a second blade portion (226).

[0046] The blade rotation axis (222) is connected to the first blade portion (224) and the second blade portion (226). The blade rotation axis (222) is installed so as to penetrate the duct (120). The blade rotation axis (222) is rotatably installed in the duct (120). The blade rotation axis (222) rotates as the first blade portion (224) and the second blade portion (226) are pushed by the flow of air. At this time, the duct (120) is formed with a through hole (122) through which the blade rotation axis (222) penetrates. The blade rotation axis (222) can be connected to the through hole (122) by a bearing (228).

[0047] The first blade portion (224) and the second blade portion (226) have a two-leaf blade structure. The first blade portion (224) and the second blade portion (226) may each have blades having the same shape. A pair of blades is such that one blade is connected to the blade rotation axis (222) and the other blade is connected at a position rotated 180° around the blade rotation axis (222). The first blade portion (224) and the second blade portion (226) are arranged perpendicular to the blade rotation axis (222). The first blade portion (224) and the second blade portion (226) may be arranged sequentially based on the longitudinal direction of the blade rotation axis (222). The rear end of each blade of the first blade portion (224) may extend in the direction of the second blade portion (226). Accordingly, the first blade portion (224) can be coupled with the second blade portion (226) so that a portion thereof overlaps with the blade rotation axis (222) in the longitudinal direction of the blade rotation axis (222).

[0048] For example, as illustrated in FIG. 3, the first blade portion (224) and the second blade portion (226) may overlap in a 2:1 ratio with a non-overlapping portion (L1) and an overlapping portion (L2), but the specific position is not limited.

[0049] According to the shape of the blade described above, the first blade portion (224) and the second blade portion (226) are arranged vertically with respect to the blade rotation axis (222), thereby forming a space through which airflow can flow, so that even if an extremely weak airflow is formed inside the duct (120), the flow of airflow is not obstructed.

[0050] In addition, the first blade portion (224) and the second blade portion (226) according to another embodiment of the present invention may be formed in a shape in which each blade is curved in the same direction. Here, the same direction means a clockwise or counterclockwise direction, and as illustrated in FIG. 4, the first blade portion (224) and the second blade portion (226) may be curved in the counterclockwise direction. Accordingly, since each blade of the first blade portion (224) and the second blade portion (226) is formed to be curved in the same direction, there is an effect in which the propeller (220) can rotate in only one direction when air flow contacts the blades.

[0051] A generator (240) is disposed outside the duct (120) and converts the rotational motion of the propeller (220) into electrical energy. The generator (240) may be connected to the propeller (220) by a shaft. The generator (240) may be connected to the propeller (220) by a different shaft. The generator (240) is provided with a generator rotation shaft (242). The generator rotation shaft (242) may be connected to the blade rotation shaft (222) by a gearbox (260) to maintain the rotational speed within a preset range. The generator rotation shaft (242) may be disposed parallel to the blade rotation shaft (222).

[0052] According to one embodiment of the present invention, a gearbox (260) connects a blade rotation shaft (222) and a generator rotation shaft (242) with a plurality of gears, as illustrated in FIG. 5. The blade rotation shaft (222) may be provided with a first acceleration gear (261), a second acceleration gear (262), and a third acceleration gear (263) having different gear ratios. The first acceleration gear (261), the second acceleration gear (262), and the third acceleration gear (263) may be provided with different sizes. The generator rotation shaft (242) may be provided with a first constant-speed gear (264), a second constant-speed gear (265), and a third constant-speed gear (266) connected to the first acceleration gear (261), the second acceleration gear (262), and the third acceleration gear (263), respectively. The first constant speed gear (264), the second constant speed gear (265), and the third constant speed gear (266) are provided in different sizes.

[0053] For example, the first acceleration gear (261) may be provided with a smaller size than the second acceleration gear (262) and the third acceleration gear (263). The second acceleration gear (262) may be provided with a larger size than the first acceleration gear (261) and a smaller size than the third acceleration gear (263). That is, the first acceleration gear (261), the second acceleration gear (262), and the third acceleration gear (263) may sequentially have larger sizes.

[0054] Additionally, the first constant speed gear (264) may be provided with a larger size than the second constant speed gear (265) and the third constant speed gear (266). The second constant speed gear (265) may be provided with a smaller size than the first constant speed gear (264) and a larger size than the third constant speed gear (266). That is, the first constant speed gear (261), the second constant speed gear (262), and the third constant speed gear (263) may have sequentially smaller sizes.

[0055] Each of the acceleration gears (261, 262, 263) can be meshed with each of the constant-speed gears (264, 265, 266). As the sizes of the first constant-speed gear (264), the second constant-speed gear (265), and the third constant-speed gear (266) decrease, a larger gear among the first constant-speed gear (264), the second constant-speed gear (265), and the third constant-speed gear (266) is connected. That is, the first acceleration gear (261) can be connected to the first constant-speed gear (264), the second acceleration gear (262) can be connected to the second constant-speed gear, and the third acceleration gear (263) can be connected to the third constant-speed gear (266).

[0056] The generator rotation axis (242) can be provided to be movable in a direction parallel to the blade rotation axis (222) by a control unit (300) described later.

[0057] The control unit (300) controls the gearbox (260) so that the generator rotation shaft (242) rotates at a rotation speed within a preset range. The control unit (300) includes a control module (320) and a controller (not shown).

[0058] The control module (320) is provided so that the operator can check and control the status of the generator (240). The control module (320) includes a display (322). The display (322) can display the rotation speed of the generator rotation shaft (242), the current power generation, the rotation direction of the blade rotation shaft (222), the rotation direction of the generator rotation shaft (242), etc. The control module (320) transmits at least one of the rotation speed information of the generator rotation shaft (242), the rotation direction information of the blade rotation shaft (222), and the rotation direction information of the generator rotation shaft (242) to the controller.

[0059] The frequency of the alternating current generated by the generator is affected by the rotational speed. If the frequency of the electricity is not maintained constant, there is a problem that the connected electronic devices do not operate smoothly. Accordingly, the controller is provided inside the control module (320) and controls the gearbox (260) so that the rotational speed of the generator rotational shaft (242) rotates at a preset range of rotations. Specifically, the controller moves the generator rotational shaft (242) connected to the gearbox (260) in the forward and backward direction so as to be parallel to the blade rotational shaft (222). The controller moves the blade rotational shaft (222) so that a pair of acceleration gears and constant-speed gears engaged with the generator rotational shaft are disengaged and another pair of acceleration gears and constant-speed gears are engaged. The controller controls the rotational speed of the generator rotational shaft (242).

[0060] For example, the controller can set the initial state so that the second acceleration gear (262) and the second constant-speed gear (265) are engaged by moving the generator rotation shaft (242) when the exhaust pressure of the duct (120) is constant. As shown in Fig. 6, the controller moves the generator rotation shaft so that the first acceleration gear (261) and the first constant-speed gear (264) are engaged when the speed of the generator rotation shaft (242) becomes faster than the preset range.

[0061] Conversely, when the speed of the generator rotation shaft (242) becomes slower than the preset range, the generator rotation shaft (242) is moved so that the third acceleration gear (263) and the third constant speed gear (266) are engaged.

[0062] The controller can control the generator rotation shaft (242) to have a constant rotation direction. The controller can receive rotation direction information of the generator rotation shaft (242) from the control module (320). As illustrated in FIG. 7, the controller can receive rotation direction information of the blade rotation shaft (222) or the generator rotation shaft (242) from the control module (320) and, if the rotation direction is reverse, move the generator rotation shaft (242) to keep the engaged gear in a disengaged state. According to the above-described example, since the generator is designed to be able to operate only when it rotates in one direction, there is an effect of preventing mechanical equipment defects by preventing the generator rotation shaft from rotating in the reverse direction.

[0063] In the above example, it was explained that the controller disengages the engaged gear to stop power generation when the power generation direction of the rotation shaft is reversed. However, as illustrated in FIG. 8, a reverse rotation prevention member (244) that prevents reverse rotation may be installed on the blade rotation shaft (222) or the generator rotation shaft (242). The reverse rotation prevention member (244) may be provided in a ratchet shape, but the shape is not limited.

[0064] In the above-described example, the inside of the duct is described as having the same width, but as illustrated in FIG. 9, the duct (120) may be formed into an expanded structure in which the width of the area where the propeller (220) is installed is wider. Since the duct (120) is formed into an expanded structure, a propeller (220) larger in size than the existing duct (120) can be used, thereby having the effect of improving power generation efficiency.

[0065] Although all components constituting the embodiments of the present invention have been described above as being combined or operating in combination, the present invention is not necessarily limited to these embodiments. That is, within the scope of the purpose of the present invention, all components may be selectively combined and operated one or more times. In addition, terms such as "include," "comprise," or "have" described above, unless specifically stated to the contrary, mean that the corresponding component may be inherent, and therefore should be interpreted as including other components rather than excluding other components. All terms, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the art to which the present invention pertains, unless otherwise defined. Commonly used terms, such as terms defined in a dictionary, should be interpreted as being consistent with the contextual meaning of the related technology, and shall not be interpreted in an ideal or overly formal sense, unless explicitly defined in the present invention.

[0066] The above description is merely an illustrative description of the technical idea of ​​the present invention, and those skilled in the art will appreciate that various modifications and variations may be made without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of ​​the present invention, but rather to explain it, and the scope of the technical idea of ​​the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

Claims

1. In a wind power generation system that utilizes air discharged from a duct, A propeller installed inside a duct through which air is discharged and rotated by the discharged air; A generator that is connected to the propeller and converts rotational kinetic energy into electrical energy; and A controller for controlling the above generator; The above propeller, It comprises a first blade section having a two-leaf blade structure, a second blade section, and a blade rotation axis, The above first blade part, A wind power generation system in which the second blade section is arranged perpendicularly to the blade rotation axis and is joined so that a portion overlaps the second blade section based on the longitudinal direction of the blade rotation axis.

2. In paragraph 1, The above first blade part, A wind power generation system in which the overlapping portion and the non-overlapping portion of the second blade portion have a ratio of 2:

1.

3. In paragraph 1, The above first blade portion and second blade portion, A wind turbine system in which each blade is curved in the same direction.

4. In paragraph 1, The above generator, Contains a generator rotating shaft, The rotation shaft of the above generator is connected to the blade rotation shaft and the gearbox, The above controller, A wind power generation system that controls the gear ratio of the gearbox according to the rotational speed of the blade rotational shaft to control the rotational speed of the generator rotational shaft within a preset range.

5. In paragraph 4, The above gearbox, It includes a first accelerator gear and a second accelerator gear which are arranged at a predetermined interval but have different gear ratios, The above controller, A wind power generation system that controls a gearbox to disengage the gear engaged to prevent the rotation shaft of the generator from rotating in reverse.

6. In paragraph 4, At least one of the above blade rotation axis and the above generator rotation axis, A wind power generation system equipped with a reverse rotation prevention member to allow rotation in only one direction.

7. In paragraph 1, The above duct, A wind power generation system formed with an expansion pipe structure that increases the width of the area in which the above propeller is installed.

8. In paragraph 1, The above duct A diffuser that directs the air flowing into the interior toward the propeller; and A wind power generation system including a dust collection filter for removing floating particles contained in the air.

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