Device for generating power by utilizing water flow

Abstract

The invention relates to the technical field of water flow power generation, in particular to a water flow power generation device which comprises a propeller, a rotary drum and a power generator. The propeller is provided with a hub and a plurality of blades. The blade root of each blade is rotatably mounted on the propeller hub, so that the included angle between straight lines where every two blades are located can be adjusted; the rotary drum is fixedly connected with the propeller hub and can rotate along with the propeller hub. A rotor of the generator is fixedly connected with the rotary drum; when the water flow speed is moderate, the included angle between the straight lines where every two blades are located can be adjusted to be within a certain range, the propeller hub is made to rotate at a certain rotating speed, and then the rotating drum and the rotor of the generator are made to rotate at a certain rotating speed. And when the water flow speed is reduced, the included angle between the straight lines where every two blades are located can be increased, so that the propeller hub keeps a stable rotating speed. And when the water flow speed is increased, the included angle between the straight lines where every two blades are located can be reduced, so that the propeller hub keeps a stable rotating speed. And on the whole, the generator is ensured to output relatively stable voltage.

Description

Technical Field

[0001] The invention relates to the technical field of generating electricity using water flow, and in particular to a device for generating electricity using water flow. Background Art

[0002] A device that generates electricity using water flow refers to a device that can generate electricity using the fluid energy of water flow. However, the rotation speed of the propeller of a conventional device that generates electricity using water flow changes with the flow velocity of the water flow, resulting in poor stability of the output voltage of the generator. Summary of the invention

[0003] The present invention provides a device for generating electricity by utilizing water flow, which is used to solve the problem that the rotation speed of the propeller of the conventional device for generating electricity by utilizing water flow changes with the change of the water flow velocity, resulting in poor stability of the output voltage of the generator.

[0004] The present invention provides a device for generating electricity using water flow, comprising: The propeller is provided with a hub and a plurality of blades; the root of each blade is rotatably mounted on the hub so that the angle between the straight lines where each two blades are located can be adjusted; The rotating drum is fixedly connected to the propeller hub and can rotate with the propeller hub; The generator and the mover are fixedly connected to the drum.

[0005] In some embodiments, it also includes: A rack is arranged in the propeller hub so as to reciprocate along the axial direction of the propeller hub; There are multiple first gears, all of which are arranged in the hub and connected to the blade roots of the multiple blades one by one; the side wall of each first gear is meshed and connected to the rack.

[0006] In some embodiments, it also includes: A first transmission rod is disposed in the propeller hub and can reciprocate along the axial direction of the propeller hub; There are multiple second transmission rods, all of which are arranged in the propeller hub, with one end being hinged to the first transmission rod respectively, and the other end being hinged to the blade roots of the multiple blades in a one-to-one correspondence.

[0007] In some embodiments, it also includes: The first driver is installed in the drum, and the output end is connected to one end of the rack / first transmission rod, so as to drive the rack / first transmission rod to move.

[0008] In some of these embodiments, the skin of each blade is capable of rotating about its own axis.

[0009] In some of these embodiments, each blade further comprises: The ring gear is installed inside the skin near the blade root; The second gear is arranged in the gear ring, and the side wall is meshed and connected with the inner wall of the gear ring; the rotating second gear can drive the gear ring and the skin to rotate.

[0010] In some of these embodiments, each blade further comprises: The second driver is installed in the blade root, and a second gear is sleeved on the output end.

[0011] In some of the embodiments, a guide groove is provided at one end of the hub away from the drum; Also includes: A seal is installed in the guide groove.

[0012] In some embodiments, it also includes: The guide head is installed at one end of the rotor away from the hub, and has an accommodating cavity for accommodating the generator formed inside.

[0013] In some embodiments, it also includes: The drainage tube is covered outside the propeller and the rotating drum; the opening size of the drainage tube at one end close to the propeller is smaller than the opening size of the end far from the propeller.

[0014] The beneficial effects of the present invention are as follows: the device for generating electricity by using water flow of the present invention is provided with a propeller, a rotating drum and a generator, and the flowing water flow acts on a plurality of blades, so that the hub rotates, and then drives the rotating drum to rotate, thereby driving the generator's mover to rotate, so that the generator generates electricity. When the water flow velocity is moderate, the angle between the straight lines where each two blades are located can be adjusted to a certain range, and / or, the skin of each blade can be rotated 90° clockwise around its own axis, so that the hub rotates at a certain speed, and then the mover of the rotating drum and the generator rotates at a certain speed. When the water flow velocity becomes smaller, the angle between the straight lines where each two blades are located can be increased, and / or, the skin of each blade can be rotated 0°-90° counterclockwise around its own axis, increasing the area of ​​the water-facing surface of each blade, so that the hub maintains a stable speed, and then the mover of the rotating drum and the generator maintains a stable speed. When the water flow rate increases, the angle between the straight lines of every two blades can be reduced, and / or the skin of each blade can be rotated clockwise 90°-180° around its own axis to reduce the area of ​​the water-facing surface of each blade, so that the hub maintains a stable speed, and the rotor of the drum and the generator maintain a stable speed. On the whole, the generator outputs a relatively stable voltage, and there is no need to set up a voltage stabilizing and regulating device. In addition, when the water flow rate is high, the angle between the straight lines of every two blades can be adjusted to 0°, and the debris attached to the blades can be separated from the blades with the help of the water flow, so that the blades have a self-cleaning function, and there is no need to manually clean the blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic structural diagram of some specific embodiments of a device for generating electricity by utilizing water flow according to the present invention; Figure 2 yes Figure 1 A front view of the device for generating electricity using water flow is shown; Figure 3 yes Figure 2 A left side view of the device for generating electricity using water flow is shown; Figure 4 It is a schematic structural diagram of some other specific embodiments of a device for generating electricity by utilizing water flow according to the present invention; Figure 5 It is a structural schematic diagram of some specific embodiments of a device for generating electricity using water flow according to the present invention.

[0016] In the attached drawings, 110, propeller; 111, hub; 112, blade; 1121, blade root; 1122, skin; 120, drum; 130, rack; 140, first gear; 150, seal; 160, guide head; 161, cable outlet; 170, drainage tube; 180, first transmission rod; 190, second transmission rod. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] As described in the background art, the rotation speed of the propeller of a conventional device for generating electricity using water flow changes with the change of the water flow velocity, resulting in poor stability of the output voltage of the generator.

[0019] To solve the above problems, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The present invention provides a device for generating electricity using water flow, including a propeller 110, a drum 120 and a generator. The propeller 110 is provided with a hub 111 and a plurality of blades 112. The root 1121 of each blade 112 is rotatably mounted on the hub 111 so that the angle between the straight lines where every two blades 112 are located can be adjusted. The skin 1122 of each blade 112 can rotate around its own axis. The drum 120 is fixedly connected to the hub 111 and can rotate with the hub 111. The mover of the generator is fixedly connected to the drum 120.

[0020] The working process and principle of the device that uses water flow to generate electricity are as follows: The device for generating electricity by water flow is installed at the bottom of a floating body such as a ship or a pontoon, and is located below the water surface. The flowing water acts on the plurality of blades 112, causing the hub 111 to rotate, thereby driving the rotating drum 120 to rotate, thereby driving the rotor of the generator to rotate, so that the generator generates electricity. The number of blades 112 can be two, three, or more than four. Figure 2 or Figure 4 The direction of the middle arrow shows the direction in which each blade 112 can swing. Figure 3 The direction of the middle arrow shows the direction in which the skin 1122 of each blade 112 can rotate. The skin 1122 of each blade 112 can reciprocate 180° around its own axis. When the water flow velocity is moderate, such as the water flow velocity is 15m / s, the angle between the straight lines where every two blades 112 are located can be adjusted to a certain range, and / or, the skin 1122 of each blade 112 can be rotated 90° clockwise around its own axis, so that the hub 111 rotates at a certain speed, and then the drum 120 and the generator's mover rotate at a certain speed. When the water flow velocity decreases, such as when the water flow velocity is 5m / s, the angle between the straight lines where every two blades 112 are located can be increased, and / or the skin 1122 of each blade 112 can be rotated counterclockwise by 0°-90° around its own axis, increasing the area of ​​the water-facing surface of each blade 112, so that the hub 111 maintains a stable rotation speed, thereby maintaining a stable rotation speed for the drum 120 and the generator's mover. When the water flow velocity increases, such as when the water flow velocity is 25m / s, the angle between the straight lines where every two blades 112 are located can be reduced, and / or the skin 1122 of each blade 112 can be rotated clockwise by 90°-180° around its own axis, reducing the area of ​​the water-facing surface of each blade 112, so that the hub 111 maintains a stable rotation speed, thereby maintaining a stable rotation speed for the drum 120 and the generator's mover. Overall, the generator outputs a relatively stable voltage, and there is no need to set up a voltage stabilizing and regulating device. In addition, when the water flow rate is high, the angle between the straight lines of every two blades 112 can be adjusted to 0°, and the debris attached to the blades 112 can be separated from the blades 112 with the help of the water flow, so that the blades 112 have a self-cleaning function and there is no need to clean the blades 112 manually.

[0021] In some practical applications, such as Figure 2As shown, in order to adjust the angle of the straight line where every two blades 112 are located, the device for generating electricity using water flow also includes a rack 130, a plurality of first gears 140 and a first driver. The rack 130 can be reciprocated in the axial direction of the hub 111 and penetrated in the hub 111. The plurality of first gears 140 are all arranged in the hub 111 and fixedly connected with the blade roots 1121 of the plurality of blades 112 in a one-to-one correspondence. The side wall of each first gear 140 is meshed and connected with the rack 130. The first driver is installed in the rotating drum 120, and the output end is connected to one end of the rack 130, which is used to drive the rack 130 to move, thereby driving each first gear 140 to rotate, thereby driving the plurality of blades 112 to rotate synchronously, so that the adjustable range of the angle of the straight line where every two blades 112 are located is 0°-90°. On the one hand, the transmission is carried out with the help of the rack 130 and the first gear 140, which improves the transmission accuracy. On the other hand, the multiple blades 112 can rotate synchronously, which greatly improves the efficiency of angle adjustment and ensures that each blade 112 is subjected to the same water flow impact force.

[0022] Preferably, when the number of the blades 112 is two, three or more than four, correspondingly, the number of the first gears 140 is two, three or more than four.

[0023] In other practical applications, such as Figure 4 As shown, the device for generating electricity by water flow also includes a first transmission rod 180, a plurality of second transmission rods 190 and a first driver. The first transmission rod 180 can be reciprocated in the axial direction of the hub 111 and penetrated in the hub 111. The plurality of second transmission rods 190 are all arranged in the hub 111, one end of which is respectively hinged to the first transmission rod 180, and the other end is hinged to the blade root 1121 of the plurality of blades 112 in a one-to-one correspondence. The first driver is installed in the rotating drum 120, and the output end is connected to one end of the first transmission rod 180, which is used to drive the first transmission rod 180 to move, and then drive each second transmission rod 190 to move, thereby driving the plurality of blades 112 to rotate synchronously, so that the adjustable range of the angle between the straight lines of each two blades 112 is 0°-180°. The plurality of blades 112 can rotate synchronously, which greatly improves the efficiency of angle adjustment and ensures that the water flow impact force on each blade 112 is the same. Since the adjustable range of the angle between the straight lines where every two blades 112 are located is larger, it is suitable for use in more working conditions.

[0024] Preferably, when the number of the blades 112 is two, three or more than four, correspondingly, the number of the second transmission rods 190 is two, three or more than four.

[0025] Preferably, the first driver can be a rotary driver or a linear driver. When the first driver is a rotary driver, the output shaft is connected to one end of the rack 130 / first transmission rod 180 through a rotary-to-direct-acting mechanism, and is used to drive the rack 130 / first transmission rod 180 to perform linear reciprocating motion. When the first driver is a linear driver, the output shaft is fixedly connected to one end of the rack 130 / first transmission rod 180, and is used to drive the rack 130 / first transmission rod 180 to perform linear reciprocating motion. When the first driver is a rotary driver, it can be a servo motor or a stepper motor. When the first driver is a linear driver, it can be an electric push rod, a hydraulic cylinder or a pneumatic cylinder, etc.

[0026] Specifically, in the exemplary embodiment, in order to enable the skin 1122 of each blade 112 to reciprocate 180° around its own axis, each blade 112 further includes a gear ring, a second gear, and a second driver. The gear ring is installed inside the end of the skin 1122 close to the blade root 1121. The second gear is arranged in the gear ring, and the side wall is meshed with the inner wall of the gear ring. The rotating second gear can drive the gear ring and the skin 1122 to rotate. The second driver is installed in the blade root 1121, and a second gear is sleeved on the output end for driving the second gear to rotate.

[0027] Preferably, the second driver is a servo motor or a stepper motor.

[0028] Specifically, in the exemplary embodiment, a guide groove is provided at one end of the hub 111 away from the drum 120. The guide groove can limit the movement amplitude and movement trajectory of the blade root 1121 of each blade 112. The device for generating electricity using water flow also includes a seal 150 and a guide head 160. The seal 150 is installed in the guide groove to play a sealing role and prevent water from flowing into the hub 111. The guide head 160 is installed at one end of the drum 120 away from the hub 111, and a receiving cavity for accommodating a generator is formed inside. On the one hand, the guide head 160 plays a role in isolating the generator from water and protecting the generator; on the other hand, the guide head 160 plays a diversion role. It should be noted that the drum 120 is rotatably connected to the guide head 160 through a bearing, and the drum 120 can rotate, while the guide head 160 never rotates.

[0029] Preferably, the sealing member 150 has a pleated structure and is made of rubber, which can be deformed to a certain extent, so as to always seal the guide groove when the position of the blade root 1121 changes.

[0030] Preferably, a cable outlet 161 is formed at the top of the guide head 160 to facilitate the electrical connection of the generator to the external power storage device / power consumption device through the cable. A sealing ring should be provided at the cable outlet 161 to prevent water from flowing into the guide head 160 through the cable outlet 161.

[0031] In some other embodiments, Figure 5 As shown, the device for generating electricity using water flow further includes a diversion tube 170 . Figure 5 The direction of the arrow in the middle shows the flow direction of the water flow. The drainage tube 170 is arranged outside the propeller 110 and the rotating drum 120, and can guide the water flow to move in a directional manner, which is conducive to the water flow acting stably on the propeller 110, and thus is conducive to the generator outputting a stable voltage. In addition, the opening size of the end of the drainage tube 170 close to the propeller 110 is smaller than the opening size of the end away from the propeller 110, which accelerates the flow velocity of the water flow and improves the power generation efficiency and power generation.

[0032] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0036] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A device for generating electricity using water flow, characterized in that: include: A propeller is provided with a hub and a plurality of blades; the root of each blade is rotatably mounted on the hub so that the angle between the straight lines where each two blades are located can be adjusted; A rotating drum, fixedly connected to the propeller hub and capable of rotating with the propeller hub; The generator and the mover are fixedly connected to the rotating drum.

2. The device for generating electricity using water flow according to claim 1, characterized in that: Also includes: A rack is arranged in the propeller hub so as to reciprocate along the axial direction of the propeller hub; There are multiple first gears, all of which are arranged in the hub and connected to the blade roots of the multiple blades in a one-to-one correspondence; the side wall of each first gear is meshed and connected to the rack.

3. The device for generating electricity using water flow according to claim 1, characterized in that: Also includes: A first transmission rod is disposed in the propeller hub and can reciprocate along the axial direction of the propeller hub; There are multiple second transmission rods, all of which are arranged in the hub, with one end hinged to the first transmission rod respectively, and the other end hinged to the blade roots of the multiple blades in a one-to-one correspondence.

4. The device for generating electricity using water flow according to claim 2 or 3, characterized in that: Also includes: The first driver is installed in the rotating drum, and the output end is connected to one end of the rack / the first transmission rod, so as to drive the rack / the first transmission rod to move.

5. The device for generating electricity using water flow according to claim 2 or 3, characterized in that: The skin of each blade can rotate around its own axis.

6. The device for generating electricity using water flow according to claim 5, characterized in that: Each of the blades also includes: A gear ring, mounted inside one end of the skin close to the blade root; The second gear is arranged in the gear ring, and the side wall is meshedly connected with the inner wall of the gear ring; the rotating second gear can drive the gear ring and the skin to rotate.

7. The device for generating electricity using water flow according to claim 6, characterized in that: Each of the blades also includes: The second driver is installed in the blade root, and the second gear is sleeved on the output end.

8. The device for generating electricity using water flow according to claim 2 or 3, characterized in that: A guide groove is provided at one end of the hub away from the rotating drum; Also includes: A sealing member is installed in the guide groove.

9. The device for generating electricity using water flow according to claim 2 or 3, characterized in that: Also includes: The guide head is installed at one end of the rotating drum away from the hub, and has an accommodating cavity for accommodating the generator formed therein.

10. The device for generating electricity using water flow according to claim 2 or 3, characterized in that: Also includes: A drainage cylinder, which is arranged outside the propeller and the rotating cylinder; The opening size of the end of the drainage tube close to the propeller is smaller than the opening size of the end far from the propeller.

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