KR102647700B1 - System for wind power generation - Google Patents

Abstract

The present invention is installed inside a duct through which air is discharged, and includes a propeller that rotates by the discharged air, a generator that is axially connected to the propeller to convert rotational kinetic energy into electrical energy, and a control unit that controls the generator, The propeller includes a first blade portion, a second blade portion, and a blade rotation axis having a two-bladed blade structure, wherein the first blade portion is disposed perpendicular to the second blade portion with respect to the blade rotation axis, and a portion of the propeller is disposed perpendicular to the blade rotation axis. The purpose is to provide a wind power generation system that is coupled to overlap the second blade portion based on the longitudinal direction of the blade rotation axis.

Description

Wind power generation system {System for wind power generation}

The present invention relates to a wind power generation system, and more specifically, to a wind power generation system that can produce electrical energy from fluid exhausted by installing a generator inside an air conditioning duct.

In large high-rise buildings and factories where it is difficult to open windows, air conditioning systems that can circulate internal air are being introduced to increase ventilation inside the building and increase indoor cooling and heating efficiency.

An air conditioning system can keep the interior comfortable by discharging polluted indoor air to the outdoors or supplying fresh outdoor air into the interior through ducts.

The air conditioner is equipped with an exhaust device that generates exhaust pressure to exhaust indoor air out of the building or bring outside air into the room.

In such air conditioning ducts, air with a certain exhaust pressure is simply discarded after performing the air conditioning function, so there is a problem in that energy is not utilized efficiently and waste occurs.

Korean Patent Publication 10-2019-0053507 (2019.05.20)

The purpose of the present invention is to provide a wind power generation system that can generate electrical energy by installing a wind generator in an air conditioning duct and utilizing air with exhaust pressure.

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 impede the air flow.

The problem to be solved by the present invention is 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.

The object is installed inside a duct through which air is discharged, and includes a propeller that rotates by the discharged air, a generator that is axially connected to the propeller to convert rotational kinetic energy into electrical energy, and a controller that controls the generator, The propeller includes a first blade portion, a second blade portion, and a blade rotation axis having a two-bladed blade structure, wherein the first blade portion is disposed perpendicular to the second blade portion with respect to the blade rotation axis, and a portion of the propeller is disposed perpendicular to the blade rotation axis. This is achieved by a wind power generation system that is coupled to overlap the second blade portion based on the longitudinal direction of the blade rotation axis.

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.

Additionally, each blade of the first blade portion and the second blade portion may be curved in the same direction.

In addition, the generator includes a generator rotation shaft, the rotation shaft of the generator is connected to the blade rotation shaft and a gearbox, and the controller rotates the blade rotation shaft to control the rotation speed of the generator rotation shaft to a preset range. The gear ratio of the gearbox can be controlled according to the number.

In addition, the gearbox includes a first acceleration gear and a second acceleration gear arranged at predetermined intervals and having different gear ratios, and the controller is configured to prevent the rotation shaft of the generator from rotating in reverse. The gearbox can be controlled to disengage gears.

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

In addition, the duct is a wind power generation system formed in an expanded pipe-type structure in which the width of the area where the propeller is installed is wider.

Additionally, the duct may include a diffuser that guides air flowing into the interior toward the propeller and a dust collection filter that removes suspended matter contained in the air.

According to the wind power generation system according to an embodiment of the present invention, the air conditioning system can be efficiently operated by converting air with exhaust pressure into electrical energy.

1 is a diagram schematically showing a wind power generation system according to an embodiment of the present invention.
FIG. 2 is a diagram schematically showing a power generation unit included in the wind power generation system of FIG. 1.
Figure 3 is a side view of the propeller included in the power generation unit of Figure 2.
Figure 4 is a diagram schematically showing a power generation unit according to another embodiment of the present invention.
Figure 5 is a diagram schematically showing a gearbox according to an embodiment of the present invention.
Figure 6 is a diagram showing the gearbox of Figure 5 in operation.
FIG. 7 is a diagram showing the meshed gears in the gearbox of FIG. 5 being released.
Figure 8 is a schematic diagram showing a gearbox according to another embodiment of the present invention.
Figure 9 is a diagram schematically showing a wind power generation system according to another embodiment of the present invention.

The embodiments described in this specification and the configurations shown in the drawings are only preferred examples of the disclosed invention, and at the time of filing this application, there may be various modifications that can replace the embodiments and drawings in this specification.

The same reference numbers or symbols shown in each drawing of this specification indicate parts or components that perform substantially the same function. The shapes and sizes of elements in the drawings may be exaggerated for clarity.

Terms used herein are used to describe embodiments and are not intended to limit and/or limit the disclosed invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. The existence or addition of numbers, steps, operations, components, parts, or combinations thereof is not excluded in advance.

Terms containing ordinal numbers, such as "first", "second", etc., used in this specification may be used to describe various components, but the components are not limited by the terms, and the terms are one It is used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention.

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

1 is a diagram schematically showing a wind power generation system according to an embodiment of the present invention. FIG. 2 is a diagram schematically showing a power generation unit included in the wind power generation system of FIG. 1. Figure 3 is a side view of the propeller included in the power generation unit of Figure 2. Figure 4 is a diagram schematically showing a power generation unit according to another embodiment of the present invention. Figure 5 is a diagram schematically showing a gearbox according to an embodiment of the present invention. Figure 6 is a diagram showing the gearbox of Figure 5 in operation. FIG. 7 is a diagram showing the meshed gears in the gearbox of FIG. 5 being released. Figure 8 is a diagram schematically showing a gearbox according to another embodiment of the present invention. Figure 9 is a diagram schematically showing a wind power generation system according to another embodiment of the present invention.

Referring to FIGS. 1 and 2 , the wind power generation system 10 includes a duct unit 100, a power generation unit 200, and a control unit 300.

The duct portion 100 serves as a passage through which air inside the building is discharged to the outside or outside air is introduced. The duct unit 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 brought in. The duct unit 100 may include a duct 120, a diffuser 140, and a dust collection filter 160.

The duct 120 is formed as a passage through which air flows inside. The duct 120 may be formed as a square or circular pipe. The duct 120 is provided with a diffuser 140, a dust collection filter 160, and a part of the power generation unit 200 therein.

The diffuser 140 regulates the flow of air flowing inside the duct 120. The diffuser 140 orients a narrow range of compressed air to flow in a certain direction. The diffuser 140 may guide air flowing into the duct 120 toward the propeller. The diffuser 140 may be provided upstream of the duct 120 rather than the propeller, which will be described later.

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 may be installed inside the duct 120 at a location adjacent to the room.

The power generation unit 200 produces electrical energy using air passing through the duct 120. The power generation unit 200 includes a propeller 220 and a generator 240.

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

The blade rotation axis 222 is connected to the first blade unit 224 and the second blade unit 226. The blade rotation axis 222 is installed penetrating the duct 120. The blade rotation axis 222 is rotatably installed in the duct 120. The blade rotation axis 222 rotates when 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 passes. The blade rotation axis 222 may be connected to the through hole 122 through a bearing 228.

The first blade portion 224 and the second blade portion 226 have a two-lobed blade structure. Each blade of the first blade unit 224 and the second blade unit 226 may be provided with the same shape. As for a pair of blades, one blade is connected to the blade rotation axis 222 and the other blade is connected to a position rotated by 180° with respect to the blade rotation axis 222. The first blade portion 224 and the second blade portion 226 are disposed perpendicular to the blade rotation axis 222. The first blade unit 224 and the second blade unit 226 may be sequentially arranged based on the longitudinal direction of the blade rotation axis 222. The rear end of each blade of the first blade unit 224 may extend in the direction of the second blade unit 226. Accordingly, the first blade portion 224 may be coupled to the blade rotation axis 222 so that a portion thereof overlaps the second blade portion 226 based on the longitudinal direction of the blade rotation axis 222.

For example, as shown in FIG. 3, the non-overlapping portion (L1) and the overlapping portion (L2) of the first blade portion 224 and the second blade portion 226 may overlap at a 2:1 ratio. However, the specific location is not limited.

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 inside the duct 120. Even if the air current is formed very weakly, it has the effect of not interfering with the air flow.

Additionally, 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 clockwise or counterclockwise, and as shown in FIG. 4, the first blade portion 224 and the second blade portion 226 may be curved counterclockwise. According to this, each blade of the first blade unit 224 and the second blade unit 226 is curved in the same direction, so that when the air flow contacts the blade, the propeller 220 can rotate only in one direction. It works.

The 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 through different axes. 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 through a gearbox 260 to maintain the rotation speed in a preset range. The generator rotation axis 242 may be arranged parallel to the blade rotation axis 222.

As shown in FIG. 5, the gearbox 260 according to an embodiment of the present invention connects the blade rotation shaft 222 and the generator rotation shaft 242 with a plurality of gears. 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 are provided in different sizes. The generator rotation shaft 242 includes a first constant speed gear 264, a second constant speed gear 265, which are connected to the first acceleration gear 261, the second acceleration gear 262, and the third acceleration gear 263, respectively. And a third constant speed gear 266 may be provided. The first constant speed gear 264, the second constant speed gear 265, and the third constant speed gear 266 are provided in different sizes.

For example, the first acceleration gear 261 may be provided in a smaller size than the second acceleration gear 262 and the third acceleration gear 263. The second acceleration gear 262 may be larger than the first acceleration gear 261 and smaller 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 have sequentially larger sizes.

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 smaller than the first constant speed gear 264 and larger 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.

Each acceleration gear (261, 262, 263) may be meshed with each constant speed gear (264, 265, 266). The first constant speed gear (264), the second constant speed gear (265), and the third constant speed gear (266) are the first acceleration gear (261), the second acceleration gear (262), and the third acceleration gear (263). As the size becomes smaller, the 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 is connected to the first constant speed gear 264, the second acceleration gear 262 is connected to the second constant speed gear, and the third acceleration gear 263 is connected to the third constant speed gear ( 266).

The generator rotation axis 242 may be provided to be movable in a direction parallel to the blade rotation axis 222 by the control unit 300, which will be described later.

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

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 displays the rotation speed of the generator rotation shaft 242, the current power generation amount, the rotation direction of the blade rotation shaft 222, and the rotation direction of the generator rotation shaft 242. The control module 320 transmits at least one of rotation speed information of the generator rotation shaft 242, rotation direction information of the blade rotation shaft 222, and rotation direction information of the generator rotation shaft 242 to the controller.

The frequency of alternating current electricity generated by a generator is affected by the rotation speed. If the frequency of electricity is not kept constant, connected electronic devices cannot operate smoothly. Accordingly, the controller is provided inside the control module 320 and controls the gearbox 260 so that the rotation speed of the generator rotation shaft 242 rotates at a rotation speed in a preset range. Specifically, the controller moves the generator rotation axis 242 connected to the gearbox 260 in the forward and backward direction to be parallel to the blade rotation axis 222. The controller moves the blade rotation axis 222 so that a pair of acceleration gears and a constant speed gear engaged with the generator rotation shaft are released and another pair of acceleration gears and a constant speed gear are engaged. The controller controls the rotation speed of the generator rotation shaft 242.

For example, when the exhaust pressure of the duct 120 is constant, the controller may move the generator rotation shaft 242 to set the meshing of the second acceleration gear 262 and the second constant speed gear 265 as the initial state. As shown in FIG. 6, when the speed of the generator rotation shaft 242 becomes faster than the preset range, the controller moves the generator rotation shaft so that the first acceleration gear 261 and the first constant speed gear 264 mesh.

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 engage.

The controller can control the generator rotation shaft 242 so that the rotation direction is constant. The controller may receive rotation direction information of the generator rotation shaft 242 from the control module 320. As shown in FIG. 7, the controller receives information on the rotation direction of the blade rotation shaft 222 or the rotation direction of the generator rotation shaft 242 from the control module 320 and maintains the meshed gear in the released state when the rotation direction is reverse. The generator rotation axis 242 can be moved to do so. According to the above-described example, the generator is designed to generate electricity only when rotating in one direction, so it is effective in preventing mechanical equipment defects by preventing the generator rotation shaft from rotating in the reverse direction.

In the above-mentioned example, it was explained that when the power generation direction of the rotation axis is reverse, the controller disengages the meshed gear to stop power generation. However, as shown in FIG. 8, reverse rotation is not performed on the blade rotation axis 222 or the generator rotation axis 242. A reverse rotation prevention member 244 may be installed to prevent. The reverse rotation prevention member 244 may be provided in a ratchet shape, but the shape is not limited.

In the above-mentioned example, the inside of the duct was described as having the same width, but as shown in FIG. 9, the duct 120 may be formed in an expanded structure in which the width of the area where the propeller 220 is installed is wider. Since the duct 120 is formed in an expanded pipe structure, a propeller 220 larger in size than the existing duct 120 can be used, which has the effect of improving power generation efficiency.

In the above, even though all the components constituting the embodiment of the present invention have been described as being combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, as long as it is within the scope of the purpose of the present invention, all of the components may be operated by selectively combining one or more of them. In addition, terms such as “include,” “comprise,” or “have” described above mean that the corresponding component may be present, unless specifically stated to the contrary, and thus do not exclude other components. Rather, it should be interpreted as being able to include other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the present invention.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. Accordingly, 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 in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

100: Duct part
200: Power generation department
220: propeller
222: Blade rotation axis
224: first blade part
226: second blade part
240: Generator
242: Generator rotation axis
244: Reverse rotation prevention member
260: Gearbox
300: control unit

Claims (8)

In a wind power generation system using air installed in a duct and discharged,
A propeller installed inside a duct through which air is discharged, and rotated by the discharged air;
A generator shaft connected to the propeller to convert rotational kinetic energy into electrical energy; and
Includes a controller that controls the generator,
The propeller is,
It includes a first blade portion, a second blade portion, and a blade rotation axis having a two-bladed blade structure,
The first blade part,
A wind power generation system that is disposed perpendicular to the second blade portion with respect to the blade rotation axis and is partially coupled to overlap the second blade portion based on the longitudinal direction of the blade rotation axis. According to paragraph 1,
The first blade part,
A wind power generation system in which the portion that does not overlap with the second blade portion and the portion that overlaps have a ratio of 2:1. According to paragraph 1,
The first blade portion and the second blade portion,
A wind power generation system in which each blade is curved in the same direction. According to paragraph 1,
The generator is,
Includes a generator rotation shaft,
The rotation axis of the generator is connected to the blade rotation axis and a gearbox,
The controller is,
A wind power generation system that controls the gear ratio of the gearbox according to the rotation speed of the blade rotation shaft in order to control the rotation speed of the generator rotation shaft to a preset range. According to paragraph 4,
The gearbox is,
It includes a first acceleration gear and a second acceleration gear arranged at predetermined intervals but having different gear ratios,
The controller is,
A wind power generation system that controls a gearbox to release the engaged gear to prevent the rotation shaft of the generator from rotating in reverse. According to paragraph 4,
At least one of the blade rotation axis and the generator rotation axis,
A wind power generation system equipped with a reverse rotation prevention member to allow rotation in only one direction. According to paragraph 1,
The duct is,
A wind power generation system formed in an expanded tube structure in which the width of the area where the propeller is installed becomes wider. According to paragraph 1,
The duct is
A diffuser that guides the air flowing inside toward the propeller; and
A wind power generation system including a dust collection filter that removes suspended matter contained in the air.

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