Environmentally friendly permanent magnet power generation device applicable to low water flow environments

Abstract

The present invention relates to the technical field of electric generators, and in particular discloses an environmentally friendly permanent magnet power generation device applicable to low-flow water environments. This device comprises a power generation unit and a casing. The casing is sheathed externally to the power generation unit, which includes an electric generator and blades. The electric generator comprises a winding and a rotor component. The casing includes a water inlet section, a connecting section, and a water outlet section. The water inlet section is equipped with an anti-blocking mechanism to filter debris and features a water collection structure to increase the water flow. The hydroelectric power generation device of the present invention does not damage the landscape.Figure to be published for the summary: Figure 1.

Description

Title of the invention: Environmentally friendly permanent magnet power generation device applicable to low water flow environments technical field

[0001] The present invention relates to the technical field of the electric generator, in particular an environmentally friendly permanent magnet electricity production device applicable to a low water flow environment. TECHNICAL CONTEXT

[0002] Hydropower is a clean, renewable, and non-polluting energy source with low operating costs. The operating costs of river-based electricity production are lower, and its use is more energy-efficient and practical.Currently, small hydroelectric power plants and mini hydroelectric power plants are built on riverbeds. The turbine's water extraction method is primarily designed as longitudinal water extraction. This method of water extraction depends on the water head pressure; therefore, it is necessary to build canals and dams to raise the water head, which increases the difficulty and cost of construction. It is only suitable for rivers with high flow rates, and for shallower rivers, it is impossible to produce electricity by building dams to create a difference in water level, thus limiting the development of river power generation.Furthermore, rivers contain a large amount of household waste, tree branches, and weeds, and this debris becomes entangled in the blades of the hydroelectric generator. This affects the generator's operating efficiency, risks harming aquatic organisms, and is environmentally unfriendly. Because some existing small hydraulic turbine generator sets have high rotational speeds and simple structures, their operation produces significant vibration, resulting in noise pollution. DISCLOSURE OF THE INVENTION

[0003] To overcome the defects and disadvantages of the existing art, the present invention aims to provide an environmentally friendly electricity production device applicable to a low water flow environment, which has a low risk of being blocked by garbage and is low polluting.

[0004] In order to achieve the above objective, an environmentally friendly permanent magnet power generation device applicable to a low-energy environment The water flow device of the present invention comprises a casing sheathed on the outside of an electricity-generating element. The electricity-generating element comprises an electric generator and blades. The electric generator is arranged to cooperate with the blades. The electric generator comprises a cylindrical stator winding and a rotor component. The rotor component comprises an input shaft and a cylindrical permanent magnet sheathed on the outside of the input shaft, and the cylindrical stator winding is sheathed on the outside of the cylindrical permanent magnet. The casing comprises a water inlet section, a connecting section, and a water outlet section. The connecting section is located between the water inlet section and the water outlet section. The electric generator is used to energize external batteries.The blades are arranged in the connecting section and rotationally connected to it via a rotating shaft. The water inlet section is equipped with an anti-blocking mechanism to filter out debris and impurities. The water inlet section features a water collection structure whose cross-section gradually decreases along the direction of the water flow. This water collection structure is used to increase the water flow rate. The water collection structure of the water inlet section accumulates the water flow, allowing the blades to achieve a higher rotational speed, thus improving power generation efficiency and adapting to environments with low water flow.

[0005] Furthermore, the cylindrical permanent magnet is a neodymium permanent magnet.

[0006] Furthermore, the anti-blocking mechanism includes a filter plate. The filter plate is arranged to cooperate with the water inlet of the water inlet section. The filter plate has a grid structure and a convex spherical shape. The concave surface of the convex spherical shape is oriented towards the water inlet section. The filter plate is engaged with the water inlet of the water inlet section by means of an engagement closure. The filter plate, having a grid structure, does not affect the flow of water and can prevent fish, shrimp, or other debris from entering the power-generating unit, thus preventing damage. The debris accumulates on the filter plate in a convex spherical shape, and the engaged filter plate is convenient for replacement during maintenance.

[0007] Furthermore, the anti-blocking mechanism further comprises a scraping component, and the scraping component comprises slide blocks, sheath blocks, and a scraper. The slide blocks are arranged in two groups, the two groups of slide blocks are located at two ends of the filter plate, respectively. The two groups of slide blocks are slidably connected to the sheath blocks. Return springs are connected between the sheath blocks and the slide blocks, and two The ends of the scraper are connected to the respective liner blocks. The scraper has bristles on one side near the housing. Debris such as aquatic plants accumulates on the filter plate during prolonged use, causing blockages in the water inlet and affecting water flow. The combination of the slide blocks and the scraper allows the debris to be scraped from the surface of the filter plate, and the return spring automatically retracts the scraper.

[0008] Furthermore, the anti-blocking mechanism further comprises a thrust component, and the thrust component comprises a hoist, a traction rope, and a traction element. The hoist is disposed on the inner wall of the hull. One end of the traction rope is connected to the scraper, and the other end of the traction rope is connected to the traction element via the hoist. The traction element is disposed in the hull and drives the scraper under the action of the water flow to scrape the debris from the surface of the filter plate. When the filter plate is blocked by debris, the water flow from the water inlet section becomes lower, the effect of the water flow on the traction element decreases, and the scraper moves under the action of the return spring to scrape the debris from the filter plate, thus achieving automatic control without manual control by means of a drive element.This saves energy and promotes environmental protection.

[0009] In addition, the traction element has a barrel-shaped structure, one end of the barrel's mouth is connected to the traction rope, the traction element is disposed at the lower part of the water inlet section, the traction element pulls the traction rope under the action of the water flow, the traction rope pulls the scraper via the hoist to scrape the debris on the surface of the filter plate, and the traction element having the barrel-shaped structure promotes the water flow to act on the traction element.

[0010] Furthermore, the electricity-producing unit further comprises an acceleration component, and the blades are arranged to cooperate with the input shaft of the electric generator via a transmission component, and the acceleration component comprises a first wheel body and a second wheel body, the surface area of ​​the first wheel body being greater than that of the second wheel body, the center of the first wheel body is fixedly connected to the rotating shaft, the center of the second wheel body is fixedly connected to the input shaft of the electric generator, the first wheel body and the second wheel body cooperate with each other through a belt transmission, the acceleration component allows the input shaft of the electric generator to obtain a higher rotational speed,so that the rotational speed of the electric generator can reach the rotational speed required for electricity production when the water flow is low, thus improving the efficiency of electricity production.

[0011] In addition, the blades have an arc cross-section with the center oriented towards the opposite direction of the water. The blades are arranged in several groups, and the several groups of blades are mounted in a circular array on the rotating shaft along the central axis of the rotating shaft. The arc-shaped blades promote the impact of the water flow, thus improving the energy conversion efficiency. The blades arranged in a circular array allow the electric generator to produce electricity even if the water level is low. This blade arrangement makes the operation of the electric generator stable and reliable and improves the range of use of the electricity production device, including streams and small brooks.

[0012] Furthermore, the electric generator further comprises an electric generator housing, and the electric generator housing is sheathed on the outside of the cylindrical stator and rotor component; the rotor component comprises a rotating shaft, a cylindrical permanent magnet sheathed on the outside of the rotating shaft, and the rotating shaft is rotationally connected to the electric generator housing; and the cylindrical stator is sheathed on the outside of the cylindrical permanent magnet and is fixedly connected to the electric generator housing. The permanent magnet electric generator exhibits properties such as high rotational speed, small volume, and high energy density, and the permanent magnet is directly mounted to the rotating shaft, which effectively reduces the influence of the gear effect on the electric generator and improves the reliability and efficiency of energy conversion.

[0013] In addition, the bottom of the hull is provided with a mounting base, a buffer mechanism is disposed on the mounting base, the hull is connected to the mounting base via the buffer mechanism, the surface of the mounting base is provided with a movable groove, the bottom of the hull is provided with a limiting plate, the limiting plate is disposed in the movable groove, the limiting plate is connected to the movable groove via the buffer mechanism, the buffer mechanism makes it possible to reduce the vibrations caused by the impact of the water flow on the blades, to reduce the noise and to reduce the influence of the noise on aquatic organisms, which is environmentally friendly.

[0014] The beneficial effects of the present invention are as follows: the water collection structure of the water inlet section accumulates the water flow to increase the water flow rate, so that the blades can achieve a higher rotational speed, thus improving the efficiency of electricity production and adapting to environments with low water flow; the filter plate having a grid structure does not affect the water flow and can prevent fish, shrimp, or other debris from entering the electricity-generating unit, thus preventing damage; the use of the combination of slide blocks and scraper allows to scrape the debris from the surface of the filter plate, and the return spring automatically retracts the scraper; the acceleration component allows the input shaft of the electric generator to achieve a higher rotational speed, so that the rotational speed of the electric generator can reach the rotational speed required for electricity production when the water flow is low, thus improving the efficiency of electricity production; the permanent magnet electric generator has a high rotational speed and a small volume, which improves the reliability and energy conversion efficiency of the electric generator; the buffering mechanism helps reduce vibrations caused by the impact of the water flow on the blades, reducing noise and minimizing the influence of noise on aquatic organisms, which is environmentally friendly. DESCRIPTION OF THE FIGURES

[0015] [Fig.1] is a diagram of the structure of the environmentally friendly permanent magnet power generation device of the present invention;

[0016] [Fig.2] is a top view of the environmentally friendly permanent magnet power generation device of the present invention;

[0017] [Fig.3] is seen in section along line AA of [Fig.2];

[0018] [Fig.4] is a top cross-sectional view of the electricity production device at environmentally friendly permanent magnet of the present invention;

[0019] [Fig.5] is a diagram of the structure of the acceleration component of the present invention;

[0020] [Fig.6] is seen in cross-section along line BB of [Fig.2];

[0021] [Fig.7] is a partial view of C the [Fig.6];

[0022] [Fig.8] is a cross-sectional view of the electric generator of the present invention;

[0023] [Fig.9] is a schematic diagram of the structure of the scraping component of the present invention.

[0024] In the figures, the reference numerals are as follows: 1 - Power generation component 2 - Hull 3 - Electric generator 4 - Blade 5 - Water inlet section 6 - Connection section 7 - Rotating shaft 8 - Anti-blocking mechanism 9 - Filter plate 10 - Scraper component 11 - Slide block 12 - Scraper 13 - Return spring 14 - Thrust component 15 - Hoist 16 - Pull rope 17 - Pulling element 18 - Acceleration component 19 - First wheel body 20 - Second wheel body 21 - Cylindrical stator winding 22 - Rotor component 23 - Electric generator housing 24 - Input shaft 25 - Cylindrical permanent magnet 26 - Mounting base 27 - Buffer mechanism 28 - Movable groove 29 - Limiting plate DETAILED DESCRIPTION OF THE INVENTION

[0025] The technical means and effects adopted to achieve the objects of the present invention will be described more clearly below in the detailed description of the implementation, structure, characteristics and effects of the present invention by reference to the figures and preferred embodiments.

[0026] With reference to Figures 1 to 9, an environmentally friendly permanent magnet power generation device applicable to a low water flow environment of the present invention comprises a shell 2 sheathed on the outside of a power generation element 1; the power generation element 1 comprises an electric generator 3 and blades 4; the electric generator 3 is arranged to cooperate with the blades 4; the electric generator 3 comprises a cylindrical stator winding 21 and a rotor component 22; the rotor component 22 comprises an input shaft 24 and a cylindrical permanent magnet 25 sheathed on the outside of the input shaft 24, and the cylindrical stator winding 21 is sheathed on the outside of the cylindrical permanent magnet 25; the shell 2 comprises a water inlet section 5, a connecting section 6 and a water outlet section,The connecting section 6 is located between the water inlet section 5 and the water outlet section. The electric generator 3 is used to power external batteries. The blades 4 are arranged in the connecting section 6 and are rotatably connected to it via a rotating shaft 7. The water inlet of the water inlet section 5 is equipped with an anti-blocking mechanism 8 to filter out debris and impurities. The water inlet section 5 has a water collection structure whose cross-section gradually decreases along the direction of the water flow. This water collection structure is used to increase the water flow rate. The water collection structure of the water inlet section collects the water flow to increase the water flow rate, allowing the blades to achieve a higher rotational speed.thus improving the efficiency of electricity production and adapting to environments with low water flow.

[0027] During use, the electricity generating device is arranged in a stream or small stream, a flow of water enters the hull 2 ​​from the water inlet, and the anti-blocking mechanism 8 at the water inlet filters aquatic organisms into a garbage box, the water inlet section 5 accelerates the flow of water, and the accelerated flow of water impacts the blades 4 in the linkage section 6 and causes the blades 4 to rotate, and the rotating blades 4 cause the electric generator 3 to rotate to produce electricity.

[0028] The cylindrical permanent magnet 25 is a neodymium permanent magnet.

[0029] The anti-blocking mechanism 8 comprises a filter plate 9, the filter plate 9 is arranged to cooperate with the water inlet of the water inlet section 5, the filter plate 9 has a grid structure, the filter plate 9 has a convex spherical shape, the concave surface of the convex spherical shape is oriented towards the water inlet section 5, the filter plate 9 is engaged with the water inlet of the water inlet section 5 by means of an engagement closure, the filter plate having the grid structure does not affect the flow of water and can prevent fish and shrimp or other garbage from entering the power-generating unit, thus preventing damage; The debris is accumulated at the level of the filter plate 9 in a convex spherical shape, and the engaged filter plate 9 is convenient for filter plate replacement during maintenance.

[0030] Preferably, the filter plate 9 can be a multi-layer fiber mesh, an alloy mesh, a grid plate, a honeycomb mesh plate, or a plow mechanism. The grid structure is selected for the filter plate 9 according to the actual situation. As a result, debris and aquatic organisms adhere little to the filter plate 9, cleaning is easy, and the influence on the water flow will be minimal; the water flow will not be blocked, and the water flow will not be reduced.

[0031] The anti-blocking mechanism 8 further includes a scraping component 10, and the scraping component 10 includes slide blocks 11, sheath blocks and a scraper 12, the slide blocks 11 are arranged in two groups, the two groups of slide blocks 11 are respectively located at two ends of the filter plate 9, the two groups of slide blocks 11 are slidably connected to the sheath blocks, return springs 13 are connected between the sheath blocks and the slide blocks 11, and two ends of the scraper 12 are connected to the sheath blocks respectively, the scraper 12 is provided with bristles on one side near the shell 2.Debris such as aquatic plants accumulates on the filter plate 9 during a long period of use, causing a blockage of the water inlet and affecting the water flow. The use of the combination of the slide blocks 11 and the scraper 12 allows the debris to be scraped from the surface of the filter plate 9, and the return spring 13 automatically returns the scraper 12.

[0032] Preferably, the return spring 13 can also be replaced by an elastic element such as an elastic cord, and the elastic element is used to automatically return the scraper 12 once the garbage is scraped, without a redundant element to control, thus reducing the cost.

[0033] The anti-blocking mechanism 8 further comprises a thrust component 14, and the thrust component 14 comprises a pulley 15, a traction rope 16, and a traction element 17. The pulley 15 is disposed on the inner wall of the hull 2. One end of the traction rope 16 is connected to the scraper 12, and the other end of the traction rope 16 is connected to the traction element 17 via the pulley. The traction element 17 is disposed in the hull 2 ​​and drives the scraper 12 under the action of the water flow to scrape the debris from the surface of the filter plate 9. When the filter plate 9 is blocked by debris, the water flow from the water inlet section 5 becomes lower, the effect of the water flow on the traction element 17 decreases, and the scraper... 12 moves under the action of the return spring 13 to scrape the debris off the filter plate 9, thus achieving automatic control without manual control using a drive element,This saves energy and promotes environmental protection.

[0034] The traction element 17 has a barrel-shaped structure, one end of the barrel's mouth is connected to the traction rope 16, the traction element 17 is disposed at the lower part of the water inlet section 5, the traction element 17 pulls the traction rope 16 under the action of the water flow, the traction rope 16 pulls the scraper 12 via the hoist 15 to scrape the garbage on the surface of the filter plate 9, and the traction element 17 having the barrel-shaped structure promotes the water flow to act on the traction element 17.

[0035] The power-producing unit 1 further comprises an acceleration component 18, and the blades 4 are arranged to cooperate with the input shaft 24 of the electric generator 3 via a transmission component, and the acceleration component 18 comprises a first wheel body 19 and a second wheel body 20, the surface area of ​​the first wheel body 19 is greater than that of the second wheel body 20, the center of the first wheel body 19 is fixedly connected to the rotating shaft 7, the center of the second wheel body 20 is fixedly connected to the input shaft 24 of the electric generator 3, the first wheel body 19 and the second wheel body 20 cooperate with each other through a belt transmission, the acceleration component 18 enables the input shaft 24 of the electric generator 3 to achieve a higher rotational speed,so that the rotational speed of the electric generator 3 can reach the rotational speed required for electricity production when the water flow is low, thus improving the efficiency of electricity production.

[0036] Preferably, the acceleration component 18 comprises several groups of first wheel bodies 19 and several groups of second wheel bodies 20, the center of the first wheel body 19 and the center of the second wheel body 20 are fixedly connected by means of a connecting rod to form a group of transmission wheels, the connecting rod is rotatably connected to the shell 2, the first wheel body 19 of the transmission wheel cooperates with the second wheel body 20 of the other group through a belt transmission, and the several groups of transmission wheels allow the input shaft 24 of the electric generator 3 to obtain a higher rotational speed.

[0037] The blades 4 are blades having an arc cross-section whose center is oriented towards the opposite direction of the water, the blades 4 are arranged in several groups, the several groups of blades 4 are mounted in a circular network on the rotating shaft 7 along the central axis of the rotating shaft 7, the arc-shaped blades 4 promote the impact of water flow, thus improving the energy conversion efficiency; the blades 4 arranged in a circular network allows the electric generator 3 to produce electricity even if the water level is low, and such an arrangement of the blades 4 makes the operation of the electric generator 3 stable and reliable, improves the range of use of the electricity production device, including streams and small brooks.

[0038] The electric generator 3 further comprises an electric generator housing 23; and the electric generator housing 23 is sheathed on the outside of the cylindrical stator 21 and the rotor component 22; the rotor component 22 comprises a rotating shaft 7, a cylindrical permanent magnet 25 sheathed on the outside of the rotating shaft 7, and the rotating shaft 7 is rotationally connected to the electric generator housing 23; and the cylindrical stator 21 is sheathed on the outside of the cylindrical permanent magnet 25 and is fixedly connected to the electric generator housing 23. The permanent magnet electric generator 3 has properties such as high rotational speed, small volume and high energy density, and the permanent magnet is directly mounted to the rotating shaft 7, which effectively reduces the influence of the gear effect of the electric generator 3 and improves the reliability and efficiency of energy conversion.

[0039] The bottom of the shell 2 is provided with a mounting base 26, a buffer mechanism 27 is disposed on the mounting base 26, the shell 2 is connected to the mounting base 26 via the buffer mechanism 27, the surface of the mounting base 26 is provided with a movable groove 28, the bottom of the shell 2 is provided with a limiting plate 29, the limiting plate 29 is disposed in the movable groove 28, the limiting plate 29 is connected to the movable groove 28 via the buffer mechanism 27, the buffer mechanism 27 reduces vibrations caused by the impact of the water flow on the 4 blades, to reduce noise and to reduce the influence of noise on aquatic organisms, which is environmentally friendly.

[0040] During operation, the power generation device is placed in a stream or small brook. A flow of water enters the casing 2 from the water inlet, and the anti-blocking mechanism 8 at the water inlet filters aquatic organisms into a collection box. The water inlet section 5 accelerates the water flow, and the accelerated water flow impacts the blades 4 in the linkage section 6, causing the blades 4 to rotate. The rotating blades 4, in turn, drive the input shaft 24 of the electric generator 3 to rotate via the acceleration component 18. The first impeller body 19 and the second impeller body 20 adapt to the rotational speed of the accelerated electric generator 3 to improve the efficiency of power generation. The vibrations caused by the impact of the water flow on the blades 4 are transmitted to the casing 2 and then reduced by buffer mechanism 27 to reduce noise,When the filter plate 9 is blocked by debris, the water flow from the water inlet section 5 becomes weaker, the effect of the water flow on the traction element 17 decreases, and the scraper 12 moves under the action of the return spring 13 to scrape the debris from the filter plate 9.

[0041] The above description represents only preferred embodiments of the present invention, and not any limitation on the present invention. The present invention is disclosed by reference to the preferred embodiments, but the present invention is not limited to them. A person skilled in the art may make any modifications or variations based on the above content as equivalent embodiments without departing from the technical solution of the present invention. Any simple modifications, equivalent modifications, and variations made to the above embodiments without departing from the technical solution of the present invention must be included within the scope of the technical solution of the present invention.

Claims

Claims

1. An environmentally friendly permanent magnet power generation device applicable to a low water flow environment, comprising a power generation member (1) and a shell (2); characterized in that, the shell (2) is sheathed outside a power generation member (1), the power generation member (1) comprises an electric generator (3) and blades (4), the electric generator (3) is arranged to cooperate with the blades (4), the electric generator (3) comprises a cylindrical stator winding (21) and a rotor component (22); the rotor component (22) comprises an input shaft (24) and a cylindrical permanent magnet (25) sheathed outside the input shaft (24), and the cylindrical stator winding (21) is sheathed outside the cylindrical permanent magnet (25);the hull (2) comprises a water inlet section (5), a connecting section (6) and a water outlet section, the connecting section (6) is located between the water inlet section (5) and the water outlet section, the electric generator (3) is used for powering external batteries, the blades (4) are arranged in the connecting section (6) and rotatably connected to the connecting section (6) via a rotating shaft (7), the water inlet of the water inlet section (5) is provided with an anti-blocking mechanism (8) for filtering garbage and impurities, the water inlet section (5) has a water collection structure whose cross-sectional area gradually decreases along the water flow direction, and the water inlet section (5) is used for increasing the water flow rate.;

2. The environmentally friendly permanent magnet power generation device applicable to a low water flow environment according to claim 1, characterized in that, the cylindrical permanent magnet (25) is a neodymium permanent magnet.

3. The environmentally friendly permanent magnet power generation device applicable to a low water flow environment according to claim 1, characterized in that, the anti-blocking mechanism (8) comprises a filter plate (9), the filter plate (9) is arranged to cooperate with the water inlet of the water inlet section (5), the filter plate (9) has a grid structure, the filter plate (9) has a convex spherical shape, the concave surface of the convex spherical shape is oriented toward the water inlet section (5), and the filter plate (9) is engaged to the water inlet of the water inlet section (5) via an engagement closure.

4. The environmentally friendly permanent magnet power generation device applicable to a low water flow environment according to claim 3, characterized in that, the anti-blocking mechanism (8) further comprises a scraping component (10), and the scraping component (10) comprises slide blocks (11) and a scraper (12), the slide blocks (11) are arranged in two groups, the two groups of slide blocks (11) are respectively located at two ends of the filter plate (9), the two groups of slide blocks (11) are slidably connected to two ends of the scraper (12), the scraper (12) is provided with bristles on a side close to the shell (2), and return springs (13) are connected between the scraper (12) and the slide blocks (11).

5. The environmentally friendly permanent magnet power generation device applicable to a low water flow environment according to claim 4, characterized in that, the anti-blocking mechanism (8) further comprises a pushing component (14), and the pushing component (14) comprises a hoist (15), a traction rope (16) and a traction member (17), the hoist (15) is arranged on the inner wall of the shell (2), one end of the traction rope (16) is connected to the scraper (12) and the other end of the traction rope (16) is connected to the traction member (17) via the hoist, the traction member (17) is arranged in the shell (2) and drives the scraper (12) under the action of the water flow to scrape the garbage on the surface of the filter plate (9).

6. The environmentally friendly permanent magnet power generation device applicable to a low water flow environment according to claim 5, characterized in that, the traction member (17) has a barrel-shaped structure, one end of the barrel mouth is connected to the traction rope (16), the traction member (17) is arranged at the lower part of the water inlet section (5), the traction member (17) pulls the traction rope (16) under the action of the water flow, and the traction rope (16) pulls the scraper (12) via the hoist (15) to scrape the garbage on the surface of the filter plate (9).

7. The environmentally friendly permanent magnet electricity generating device applicable to a low water flow environment according to claim 1, characterized in that, the electricity generating member (1) further comprises an acceleration component (18), and the blades (4) are arranged to cooperate with the input shaft (24) of the electric generator (3) via a transmission component, and the acceleration component (18) comprises a first wheel body (19) and a second wheel body (20), the surface area of the first wheel body (19) is larger than that of the second wheel body (20), the center of the first wheel body (19) is fixedly connected to the rotating shaft (7), the center of the second wheel body (20) is fixedly connected to the input shaft (24) of the electric generator (3), and the first wheel body (19) and the second wheel body (20) cooperate with each other through a belt transmission.

8. The environmentally friendly permanent magnet power generation device applicable to a low water flow environment according to claim 1, characterized in that, the blades (4) are blades having an arc-shaped cross-section with the center facing the reverse direction of the water, the blades (4) are arranged in several groups, and the several groups of blades (4) are mounted in a circular array on the rotating shaft (7) along the central axis of the rotating shaft (7).

9. The environmentally friendly permanent magnet power generation device applicable to a low water flow environment according to claim 1, characterized in that, the electric generator (3) further comprises an electric generator housing (23); and the electric generator housing (23) is sheathed outside the cylindrical stator (21) and the rotor component (22); the rotor component (22) comprises a rotating shaft (24), a cylindrical permanent magnet (25) sheathed outside the rotating shaft (24), and the rotating shaft (24) is rotatably connected to the electric generator housing (23); and the cylindrical stator (21) is sheathed outside the cylindrical permanent magnet (25) and is fixedly connected to the electric generator housing (23).

10. The environmentally friendly permanent magnet power generation device applicable to a low water flow environment according to claim 1, characterized in that, the bottom of the shell (2) is provided with a mounting base (26), a buffer mechanism (27) is arranged on the mounting base (26), the shell (2) is connected to the mounting base (26) via the buffer mechanism (27), the surface of the mounting base (26) is provided with a movable groove (28), the bottom of the shell (2) is provided with a limiting plate (29), the limiting plate (29) is arranged in the movable groove (28), and the limiting plate (29) is connected to the movable groove (28) via the buffer mechanism (27).

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