Micro-hydro power generation system using water flow

Abstract

The present invention relates to a small hydroelectric power generation system utilizing water flow, wherein the system comprises: a pair of helical turbines (100) having a plurality of helical rotating blades that rotate in opposite directions to enable stable rotation even with resistance and lift caused by water currents and turbulent currents; a support frame (200) that stably supports the pair of helical turbines (100) underwater and can be fixedly mounted with one or more of them; a pair of guides (300) fixedly mounted on the support frame (200) that filter out the attachment of sludge flowing along currents or water flow, divide the fluid flow to allow it to flow into and out of the pair of helical turbines (100), and simultaneously increase rotational inertia to help the stable rotation of the turbines; and a gearbox (400) that matches the high torque of the pair of helical turbines (100) with the high rotational speed of the generator. By implementing a small hydroelectric power generation system using water flow characterized by including a power generation module (500) having a control means (510) that produces and controls alternating current (AC) electricity by the continuous and stable rotation of the above pair of helical turbines (100); and an air-floating body (600) that floats the power generation system to the upper part of the floating body when installing the power generation system underwater or during repair and maintenance, it has the effect of high energy conversion efficiency utilizing both drag force from the water current and lift force from the vortex, and stable power generation and repair and maintenance are possible even in turbulent and rapid currents.

Description

Technology Field

[0001] The present invention relates to a small hydroelectric power generation system, and more specifically, to a small hydroelectric power generation system utilizing water flow that enables power generation in tides and waterways through a pair of helical turbines having a plurality of spiral blades and capable of rotating in opposite directions, a streamlined guide that assists the rotational inertia of the turbines, a support frame that mounts the turbines in multiple stages, and an air-cushioned body. Background Technology

[0003] Generally, hydroelectric power generation produces electrical energy by rotating an underwater turbine (or water wheel) using the kinetic energy of seawater flow or the flow of water from rivers and streams, utilizing the direction and speed of the water flow without the need for separate facilities such as dams or reservoirs. Furthermore, hydroelectric power generation is classified into horizontal-axis hydroelectric power generation, which is advantageous for areas with unidirectional flow, and vertical-axis hydroelectric power generation, which is advantageous for areas with changing flow, such as ocean currents, depending on the rotation direction of the underwater turbine. Compared to hydroelectric power generation that utilizes water drop, this hydroelectric power generation method is more environmentally friendly in that it does not require dams or reservoirs and does not affect the movement of ships or fish. Additionally, because it utilizes physical flow, it not only produces no carbon emissions but can also provide sustainable energy.

[0004] Meanwhile, with reference to FIG. 1 (a), according to KR No. 10-1740712 (May 22, 2017) proposed by the present inventor, which is applicable to a water flow power generation method, a blade for a water turbine of a water flow power generation device is disclosed, comprising: a wing body formed with a cylindrical surface of a certain thickness in the shape of a semicircle or arc, and having a water passage hole formed by penetrating the cylindrical surface at a certain length and interval along the cylindrical surface; a buoyancy body attached to each end of the inner surface of the wing body; and an elastic plate having one end attached to each end of the buoyancy body on the water passage hole side of the wing body, and the other end being in close contact with the center of the inner diameter, and having a core material embedded inside to provide a restoring force.

[0005] However, when the above-mentioned patented technology is installed in the ocean or river, there was a problem in that various types of sludge flowing in along the water flow due to the multiple water passage holes formed in the rotor blade body accumulated in layers in the water passage holes, thereby hindering the rotation of the water wheel.

[0006] Additionally, with reference to FIG. 1 (b), according to KR No. 10-1774232 (August 29, 2017) proposed by the inventor, a small water turbine is disclosed comprising: a first axis fixed vertically; a main body supported by the first axis, streamlined, and rotatable around the first axis so as to be positioned in response to a fluid; a plurality of blade modules, each having a portion received in the main body and a remainder exposed or protruding outside the main body; and a power generation module installed in the main body and capable of generating power by the rotation of the blade module; wherein the blade module comprises: a second axis fixed vertically to the main body; a blade portion formed as a semi-cylindrical column that is rotatable around the second axis by the fluid and has different resistance depending on the portion in contact with the fluid; a linkage means for linking adjacent blade portions; and a flexible valve piece mounted on the blade portion and having at least a portion that expands in one direction in response to the fluid.

[0007] However, in the case of the above-mentioned patented technology, although the multiple valve pieces mounted on the blade section formed as a semi-cylindrical column can rotate the blade section or prevent the blade section from bending due to resistance from the fluid flow, there was a problem in that various types of sludge flowing in along the water flow accumulated in layers on the valve pieces, hindering the rotation of the water wheel. To resolve this problem, a filter mesh can be installed at the front of the blade section, but the problem that if sludge accumulates on the filter mesh, it can delay the fluid flow speed and hinder the rotation of the blade section was still being pointed out. The problem to be solved

[0009] Accordingly, the objective of the present invention is to provide a small hydroelectric power generation system utilizing water flow that is designed to solve the problems of the prior art, and which has high energy conversion efficiency and stable power generation even in turbulent and rapid currents, and is easy to repair and maintain, by utilizing both drag force from the water flow and lift force from the vortex through a pair of helical turbines having multiple helical type blades that can rotate in opposite directions, a streamlined guide that splits the water flow before and after the turbine to increase rotational inertia force, a support frame that mounts the turbine in multiple stages, and an air-cushioned body. means of solving the problem

[0011] According to the features of the present invention for achieving the aforementioned purpose, in a small hydroelectric power generation system using water flow, the system comprises: a pair of helical turbines (100) in which a dual turbine having a plurality of helical type rotor blades rotates in opposite directions to enable stable rotation even under resistance and lift caused by water currents and vortex turbulence; a support frame (200) that stably supports the pair of helical turbines (100) underwater and can be fixedly mounted in one or more places; and a pair of guides (300) that are fixedly mounted on the support frame (200), filter out the attachment of sludge flowing along the current or water flow, divide the fluid flow to allow it to flow into and out of the pair of helical turbines (100), and simultaneously increase the rotational inertial force to help the stable rotation of the turbines. A small hydroelectric power generation system using water flow is provided, characterized by including: a gearbox (400) that adjusts the high torque of the pair of helical turbines (100) and the high rotational speed of the generator; a power generation module (500) having a control means (510) that produces and controls alternating current (AC) electricity through the continuous and stable rotation of the pair of helical turbines (100); and an air pipe (600) that floats the power generation system to the top of the float body when installing the power generation system underwater or during repair and maintenance.

[0012] According to another embodiment of the present invention, the pair of helical turbines (100) are further characterized by including a rotation axis (110) for fixedly supporting and rotating the rotor blades of the pair of helical turbines (100) which are mounted on the support frame (200); a rotor blade (120a~120c) which is fixedly mounted on the rotation axis (110) and is manufactured as a three-bladed helical type with a 120° phase angle to enable rotational response to resistance force, lift force, vortex, and turbulence of currents or water flow; and linkage means (130) which are manufactured as flat gears to enable the pair of helical turbines (100) to rotate in opposite directions according to the flow of fluid.

[0013] According to another embodiment of the present invention, the support frame (200) is characterized by being capable of mounting one or more of the pair of helical turbines (100) vertically or horizontally depending on the tidal environment or water flow environment and the increase in power generation.

[0014] According to another embodiment of the present invention, the support frame (200) is characterized by further including a bracket (210) that can be attached and detached for repair and maintenance, and can fix and mount the pair of helical water turbines (100).

[0015] According to another embodiment of the present invention, the pair of guides (300) are each further comprising a streamlined front guide (310) that divides the fluid flow direction into rotor blades (120a to 120c) of the pair of helical turbines (100) and filters out sludge, and a back guide (320) having a larger cross-sectional area than the front guide (310) to increase the rotational inertia of the turbine according to the fluid flow direction through the streamlined front guide (310) and the pair of helical turbines (100).

[0016] According to another embodiment of the present invention, the gearbox (400) is further characterized by including a gear module (410) having a plurality of large and small flat gears inside the gearbox (400) to adjust the high torque of the pair of three-bladed helical turbines (100) and the high rotational speed of the generator of the power generation module (500).

[0017] According to another embodiment of the present invention, the air buoyancy body (600) is further characterized by including, respectively, a pair of pipes (610) having a certain standard and capable of injecting air, a first lifting means (620) having a lifting hook (621) and a lifting rope (622) for vertically or horizontally lifting the power generation system installed underwater with respect to the pair of pipes (610) and a second lifting means (630) having a hinge means (640) and a system control unit (650) for lifting the power generation system to the top of the pair of pipes (610) in conjunction with the first lifting means (620) and maintaining a horizontal state. Effects of the invention

[0019] A small hydroelectric power generation system using water flow according to a preferred embodiment of the present invention has the following effects.

[0020] (1) The present invention is implemented such that a dual turbine with multiple helical type blades, which utilize both drag force from water currents and lift force from vortices, rotates in opposite directions, thereby allowing it to be easily attached to weirs or bridge piers installed in open waterways such as rivers and valleys in Korea, which utilize ocean currents, and is easy to maintain, thus enabling the utilization of water resources at a low cost.

[0021] (2) The present invention enables continuous power generation by applying a streamlined guide that splits the water flow at the front and rear of a dual turbine having a plurality of helical type blades in the direction of the water flow, thereby stably rotating the dual turbine even in rapids, vortices, eddies, and turbulence.

[0022] (3) The present invention allows for the simple installation or replacement of dual water turbines vertically or horizontally using anchors in various waterway environments such as oceans, rivers, valleys, and maintained irrigation canals, thereby providing economic efficiency, convenience, and reliability, as well as facilitating repairs and enabling the efficient supply of energy to energy-poor regions. Brief explanation of the drawing

[0024] FIGS. 1 (a) and (b) are drawings illustrating the prior art. FIG. 2 is a drawing showing the core technical configuration of a small hydropower generation system using water flow according to a preferred embodiment of the present invention. FIG. 3 is a drawing for explaining the positions of the front guide and back guide according to the fluid direction with respect to FIG. 2. FIG. 4 is a drawing specifically showing the configuration of a pair of helical turbines for a small hydroelectric power generation system using water flow according to a preferred embodiment of the present invention. FIG. 5 is a drawing showing an interlocking means for a small hydroelectric power generation system using water flow according to a preferred embodiment of the present invention. FIG. 6 is a drawing showing a pair of helical turbines mounted on a support frame for a small hydroelectric power generation system using water flow according to a preferred embodiment of the present invention. FIG. 7 is a drawing showing a pair of helical turbines mounted on a support frame and a bracket for a small hydroelectric power generation system using water flow according to a preferred embodiment of the present invention. FIG. 8 is a drawing showing a gearbox and a power generation module for a small hydroelectric power generation system using water flow according to a preferred embodiment of the present invention. FIG. 9 is a drawing showing a power generation system for a small hydroelectric power generation system using water flow according to a preferred embodiment of the present invention mounted on a floating body. FIG. 10 is a drawing showing the underwater power generation system of a small hydroelectric power generation system using water flow according to a preferred embodiment of the present invention being lifted onto a floating body for repair and maintenance. FIGS. 11 and 12 are actual photographs of a test prototype for a small hydroelectric power generation system using water flow according to a preferred embodiment of the present invention. Specific details for implementing the invention

[0025] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that reference numerals are assigned to the components of each drawing, and that the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, even if the same reference numeral as in the prior art is indicated, the prior art should be interpreted as such. Additionally, while describing the present invention, detailed descriptions of related known components or functions are omitted if it is determined that such detailed descriptions could obscure the essence of the present invention.

[0026] Referring to FIGS. 2 to 12, the core technical configuration of a small hydroelectric power generation system using water flow according to a preferred embodiment of the present invention is broadly composed of a pair of helical turbines (100), a support frame (200), a pair of blades (300), a gearbox (400), a power generation module (500), and an air pipe (600).

[0027] First, referring to FIGS. 2 to 4, a pair of helical turbines (100) is a means of rotating by receiving drag force from water currents and lift force from vortices, and is a means of rotating in opposite directions with a dual turbine having a plurality of helical type rotor blades so as to be able to rotate stably even with drag force and lift force from water currents and vortex turbulence.

[0028] In addition, the pair of helical turbines (100) according to an embodiment of the present invention may further include a rotation axis (110) for fixedly supporting and rotating the rotor blades of the pair of helical turbines (100) which are mounted on the support frame (200), a rotor blade (120a~120c) which is fixedly mounted on the rotation axis (110) and manufactured as a three-bladed helical type with a 120° phase angle to enable rotational response to resistance force, lift force, vortex, and turbulence of current or water flow, and linkage means (130) which is manufactured as a flat gear to enable the pair of helical turbines (100) to rotate in opposite directions according to the flow of fluid.

[0029] Here, the rotor blades (120a~120c) manufactured in the shape of a helical type with three blades (or three blades) have the characteristic of generating a large rotational force by adding not only the drag force of the fluid pressurized, but also the pressurizing force caused by lift, vortices, and turbulence, thereby increasing the power generation efficiency of the power generation module (500). In addition, the rotor blades (120a~120c) manufactured in the shape of a helical type with three blades have the characteristic of rotating stably by receiving the pressurizing force of the fluid divided through the front guide (310) of the pair of guides (300), and the pressurized fluid is easily passed through the helical radius of curvature formed on the rotor blades (120a~120c), so no obstruction to rotation occurs. In addition, through the back guide (320) of the above pair of guides (A Pair of Guide, 300), it is possible to achieve a more stable rotational inertia force by the traction force that pulls the fluid passing through the rotor blades (120a~120c), and there is a unique feature that can resolve the problem of sludge contained in ocean currents or water currents in rivers, streams, or valleys getting caught on the rotor blades (120a~120c) by the rotation of the rotor blades (120a~120c) which are manufactured as three spiral blades.

[0030] Meanwhile, the rotary blades (120a to 120c) manufactured in a helical (Helical Type) of the three blades (or three blades) according to the embodiment of the present invention are not limited to three blades and can be manufactured in multiple numbers depending on the ocean current environment or the water flow environment of a river, stream, or valley.

[0031] Next, with reference to FIGS. 2, FIGS. 3, FIGS. 6, and FIGS. 7, the support frame (200) is a means for stably supporting and fixedly mounting the pair of helical water turbines (100), and is a means for stably supporting the pair of helical water turbines (100) underwater and fixedly mounting one or more of them.

[0032] In addition, the support frame (200) according to an embodiment of the present invention can mount one or more of the pair of helical turbines (100) vertically or horizontally depending on the ocean current environment or the water flow environment in a river, stream, or valley and the increase in power generation.

[0033] In addition, the support frame (200) according to an embodiment of the present invention may further include a bracket (210) that can be attached and detached for repair and maintenance, and can fix and mount the pair of helical water turbines (100).

[0034] In this case, manufacturing the support frame (200) so that one or more of the pair of helical turbines (100) can be mounted vertically or horizontally has the characteristic that in places with excellent marine current environments, the power generation amount can be greatly increased and power generation efficiency can be improved by installing multiple pairs of helical turbines (100) in a multi-stage vertical configuration. In addition, when installed on bridges such as rivers or streams, multiple pairs of helical turbines (100) can be installed horizontally, allowing for a greater increase in power generation without wasting limited water resources, thereby enabling proactive response to power energy vulnerable areas. Furthermore, the detachable bracket (210) has the characteristic that the pair of helical turbines (100) can be expanded or reduced depending on the installation environment of the turbine, and the pair of helical turbines (100) can be independently replaced, repaired, and maintained.

[0035] Next, with reference to FIGS. 2 and 3, a pair of guides (300) are fixedly mounted on the support frame (200) as a means to filter out sludge attachments and increase the rotational inertial force by inflowing and outflowing fluid to the water turbine, thereby helping the water turbine rotate. They filter out sludge attachments flowing along the current or water flow, divide the fluid flow to inflow and outflow to the pair of helical water turbines (100), and at the same time increase the rotational inertial force to help the water turbine rotate stably.

[0036] Additionally, the pair of guides (300) according to an embodiment of the present invention may each include a streamlined front guide (310) that divides the fluid flow direction into rotor blades (120a to 120c) of the pair of helical water turbines (100) and filters out sludge, and a back guide (320) having a larger cross-sectional area than the front guide (310) to increase the rotational inertia of the water turbine according to the flow direction of the current or water flow passing through the streamlined front guide (310) and the pair of helical water turbines (100).

[0037] Referring to FIGS. 2 and 3, when a small hydroelectric power generation system using water flow according to an embodiment of the present invention is installed in the ocean, the installation directions of the front guide (310) and the back guide (320) may be changed according to the direction of fluid flow in the ocean. At this time, the installation direction can be configured to be manually switched according to the tide, or automatically switched by a sensor that detects the flow of ebb and flow tides, an electric motor that changes the direction of the assembly of the power generation system, and a system control unit (650).

[0038] Next, with reference to FIG. 8, the gearbox (400) is a means for adjusting the rotational speed of the generator of the pair of helical turbines (100), and is a means for adjusting the high torque of the pair of helical turbines (100) and the high rotational speed of the generator.

[0039] In addition, the gearbox (400) according to an embodiment of the present invention may further include a gear module (410) having a plurality of large and small flat gears inside the gearbox (400) to adjust the high torque of the pair of helical turbines (100) and the high rotational speed of the generator of the power generation module (500).

[0040] Here, the gear module (410) is a means for matching torque and rotational speed, and since the pair of helical turbines (100) are rotated simultaneously by means of the linkage means (130) of the spur gears (130a, 130b) mounted on the upper part of the dual turbine (100a, 100b), they have high torque, whereas the generator of the power generation module (500) has a high rotational speed (rpm). Therefore, by adjusting the high torque of the turbine and the high rotational speed of the generator through the gear module (410), which is composed of multiple large and small spur gears inside the gearbox (400), the generator is operated stably, preventing burnout and enabling the production of high-quality electricity.

[0041] Next, with reference to FIG. 2 and FIG. 8, the power generation module (500) has a means for producing electricity by the rotation of the pair of helical turbines (100), and has a control means (510) for producing and controlling alternating current (AC) electricity by the continuous and stable rotation of the pair of helical turbines (100).

[0042] Finally, with reference to FIGS. 9 and 10, the air-floating body (Air Pipe, 600) is a means for installing a small hydroelectric power generation system using water flow according to an embodiment of the present invention underwater or lifting it from underwater during repair and maintenance, and is a means for installing the power generation system underwater or lifting it to the top of the floating body during repair and maintenance.

[0043] Additionally, the air-floating body (600) according to an embodiment of the present invention may further include a pair of pipes (610) having a certain standard and capable of injecting air, a first lifting means (620) having a lifting hook (621) and a lifting rope (622) for vertically or horizontally lifting the power generation system installed underwater with respect to the pair of pipes (610) and a second lifting means (630) having a hinge means (640) and a system control unit (650) for lifting the power generation system to the top of the pair of pipes (610) in conjunction with the first lifting means (620) and maintaining a horizontal state.

[0044] Here, the first lifting means (620) and the second lifting means (630) of the air-cushioned body (600) have the characteristic of making it easy to lift the power generation system onto the upper part of the pair of pipes (610) of the air-cushioned body (600) for repairing breakdowns and performing periodic maintenance of the power generation system installed underwater. In addition, it has the characteristic of being useful when moving and installing the power generation system lifted onto the pair of pipes (610) of the air-cushioned body (600). Furthermore, the second lifting means (630) of the air-cushioned body (600), which is interlocked with the first lifting means (620) of the air-cushioned body (600), can be configured to allow the power generation system to be lifted onto the pair of pipes (610) of the air-cushioned body (600) at the site or a remote location through a hinge means (640) and a system control unit (650). In addition, by controlling the amount of air injected into a pair of pipes (610) of the air-cushioned body (600) in the ocean, the power generation system can be raised to the sea surface or submerged at various heights depending on the depth of the water, allowing for adaptive installation in an environment with currents. At this time, it is obvious that the power generation system must be manufactured as a waterproof type with a complete sealing function to account for electrical leakage when submerged in water, or that a separate frame or bracket, etc., must be extended and installed on the air-cushioned body (600) so that it does not get submerged in water. In addition, to inject air into a pair of pipes (610) of the air-cushioned body (600), the air injection means can be configured on one side of a pair of pipes (610) of the air-cushioned body (600) so that air can be injected at a local area or a remote area through a separate air injection means and a system control unit (650), thereby allowing the power generation system to be adaptedly installed according to user convenience and the tidal environment.

[0045] Meanwhile, FIGS. 11 and 12 show actual test prototypes of a small hydroelectric power generation system using water flow according to a preferred embodiment of the present invention. These actual test prototypes can be modified and manufactured into various prototype forms, taking into account the efficiency and performance improvement of the power generation system and the economic feasibility of manufacturing.

[0046] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by such embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0048] 100: A pair of helical turbines 100a, 100b: Dual turbines 110: Rotation axis 120a~120c: Rotating blades 130: Interlocking means 130a, 130b: Spur gears 200 : Support frame 210 : Bracket 300: A pair of guides 310: Front guide 320 : Back guide 400 : Gearbox 410 : Gear Module 500 : Power Generation Module 600 : Air cushion 610 : A pair of pipes 620: First lifting means 621: Lifting hook 622 : Elevator rope 630 : Second elevator means 640 : Hinge means 650 : System control unit

Claims

Claim 1 In a small hydroelectric power generation system utilizing water flow, the system comprises: a pair of helical turbines (100) in which a dual turbine having a plurality of helical-type rotor blades rotates in opposite directions to enable stable rotation even under resistance, lift, and turbulent currents caused by water currents; a support frame (200) that stably supports the pair of helical turbines (100) underwater and can be fixedly mounted with one or more of them; a pair of guides (300) fixedly mounted on the support frame (200) that filter out the attachment of sludge flowing along currents or water flow, divide the fluid flow to allow it to flow into and out of the pair of helical turbines (100), and simultaneously increase the rotational inertial force to assist in the stable rotation of the turbines; and a high of the pair of helical turbines (100). A gearbox (400) that adjusts the torque and the high-speed rotational speed of the generator; and a power generation module (500) having a control means (510) that produces and controls alternating current (AC) electricity by the continuous and stable rotation of the pair of helical turbines (100);A small hydroelectric power generation system using water flow, characterized in that it includes an air buoyancy body (Air Pipe, 600) for installing the power generation system underwater or for floating it on top of a buoyancy body during repair and maintenance, wherein the air buoyancy body (600) further includes a pair of pipes (A Pair of Pipe, 610) having a certain standard and capable of injecting air, a first lifting means (620) fixedly mounted on the upper part of the pair of pipes (610) and having a lifting hook (621) and a lifting rope (622) for lifting the power generation system installed underwater vertically or horizontally relative to the pair of pipes (610), and a second lifting means (630) having a hinge means (640) and a system control unit (650) for lifting the power generation system to the upper part of the pair of pipes (610) in conjunction with the first lifting means (620) and maintaining a horizontal state. Claim 2 A small hydroelectric power generation system using water flow according to claim 1, wherein the pair of helical turbines (100) are mounted on the support frame (200) and further include a rotation axis (110) for fixedly supporting and rotating the rotor blades of the pair of helical turbines (100), a rotor blade (120a~120c) fixedly mounted on the rotation axis (110) and manufactured as a three-bladed helical type with a 120° phase angle to enable rotational response to resistance force, lift force, vortex, and turbulence of currents or water flow, and linkage means (130) manufactured as a flat gear to link the pair of helical turbines (100) so that they can rotate in opposite directions according to the flow of fluid. Claim 3 A small hydroelectric power generation system using water flow according to claim 1, wherein the support frame (200) is capable of vertically or horizontally mounting one or more of the pair of helical turbines (100) depending on the tidal environment or water flow environment and the increase in power generation. Claim 4 A small hydroelectric power generation system using water flow according to claim 1, wherein the support frame (200) is capable of fixedly mounting the pair of helical turbines (100) and further includes a bracket (210) that is detachable for repair and maintenance. Claim 5 A small hydroelectric power generation system using water flow according to claim 1, wherein each of the pair of guides (300) further includes a streamlined front guide (310) that divides the fluid flow direction into rotor blades (120a~120c) of the pair of helical turbines (100) and filters out sludge, and a back guide (320) having a larger cross-sectional area than the front guide (310) to increase the rotational inertia force of the turbine according to the fluid flow direction passing through the streamlined front guide (310) and the pair of helical turbines (100). Claim 6 A small hydroelectric power generation system using water flow according to claim 1, wherein the gearbox (400) further includes a gear module (410) having a plurality of large and small flat gears inside the gearbox (400) to adjust the high torque of the pair of three-blade helical turbines (100) and the high rotational speed of the generator of the power generation module (500). Claim 7 delete

Images