Bionic swallow synchronous vibration suppression and power generation device and method for attaching ocean riser

Abstract

The present application relates to a kind of bionic swallow synchronous vibration suppression and power generation device and method of attaching ocean riser, device is by two wings horizontal sliding truss, two can be turned big impeller and scissor-shaped swallow tail module three parts constitute.Little and big impeller rotate under the driving of sea current, the rotation of big impeller drives horizontal slider to reciprocate on screw under the cooperation of extension spring, scissor-shaped swallow tail module constantly opens and closes.Horizontal movement of horizontal slider, movement of horizontal rod and the rotation of little impeller will disturb the shedding of vortex behind ocean riser, so as to suppress the effect of ocean riser vibration.Meanwhile, horizontal movement of horizontal slider, the rotation of screw and little impeller will cut magnetic induction line, produce electric current, realize synchronous vibration suppression and power generation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of ocean energy capture and marine riser vortex-induced vibration suppression device, and particularly relates to a bionic swallow-shaped synchronous vibration suppression and power generation device attached to a marine riser and a method thereof. BACKGROUND

[0002] The development of economic society cannot be separated from the use of energy. China's sea area is rich in oil and gas resources, and the ocean contains huge ocean current energy, wave energy, tidal energy and other renewable resources. Vigorously developing marine energy is the key to ensuring the rapid development of social economy.

[0003] In the process of developing seabed oil and gas resources, the marine riser is a key device connecting the seabed wellhead and the sea surface oil and gas collection and processing facilities. However, the marine riser serves in a complex marine physical environment. Under the action of ocean current, alternating vortexes appear behind the marine riser, causing it to bear periodic fluid forces. This fluid force triggers the vortex-induced vibration of the marine riser. The larger the length-diameter ratio (the ratio of pipe length to pipe diameter) of the marine riser, the more obvious the vortex-induced vibration. In severe cases, it can cause fatigue damage to the marine riser, and even cause a rupture accident, causing significant economic losses and lasting damage to the marine environment. Therefore, developing a marine riser vortex-induced vibration suppression device is a key scientific problem for the safety of marine oil and gas exploitation.

[0004] At the same time, in 2020, the state clearly put forward the "double carbon" goal. Therefore, under the premise of ensuring the steady development of economy, it is urgent to vigorously develop renewable clean energy. If an additional device is added outside the marine riser, it can not only suppress the vibration of the marine riser, but also convert the kinetic energy of the ocean current into electrical energy, which will be a one-two punch strategy to promote the country's low-carbon development. SUMMARY

[0005] To solve the problems raised in the background art, the purpose of the present application is to provide a bionic swallow-shaped synchronous vibration suppression and power generation device attached to a marine riser and a method thereof.

[0006] In order to achieve the above-mentioned purpose, the device of the present application adopts the following technical scheme:

[0007] A bionic swallow-shaped synchronous vibration suppression and power generation device attached to a marine riser is composed of two-wing horizontal sliding trusses, two steerable large impellers and a scissor-shaped swallow tail module. The two-wing horizontal sliding truss includes a rotatable sleeve, two pairs of sliding block support frames, a pair of screw rods and a pair of horizontal sliding blocks; each steerable large impeller includes a large impeller sleeve, a large bevel gear, three bevel gear baffles, three small bevel gears and three large blades; the scissor-shaped swallow tail module includes a support rod, two horizontal rods, an extension spring, eighteen small impeller bearings and eighteen small impellers.

[0008] The circular ring bearing is sleeved on the outer wall of the marine riser with a height interval of a rotatable sleeve, the rotatable sleeve is a hollow cylindrical structure, the rotatable sleeve is sleeved on the outer wall of the circular ring bearing, so that the rotatable sleeve is freely rotatable around the marine riser in the circumferential direction; two pairs of slider support frames are symmetrically arranged on the outer wall surface of the middle part of the rotatable sleeve, and the two pairs of slider support frames are in the same vertical plane; the slider support frame is an "L" shaped steel frame with a square cross section, the long end of the slider support frame is perpendicular to the outer wall of the rotatable sleeve, the long ends of the pair of slider support frames arranged on each side are parallel to each other, and the short ends of the pair of slider support frames arranged on each side are arranged opposite to each other and connected to a circular ring connecting piece, so that the pair of slider support frames arranged on each side form a "U" shaped door frame, and a magnetic strip is embedded in the slider support frame. A screw rod is arranged on the center line of the "U" shaped door frame formed by the pair of slider support frames arranged on each side, a wire is arranged in the screw rod, one end of the screw rod is connected to the rotatable sleeve through a roller bearing, and the other end of the screw rod penetrates through the circular ring connecting piece of the slider support frame and extends into the inside of the large impeller sleeve and is fixedly connected to the large bevel gear, wherein the circular ring connecting piece of the slider support frame and the large impeller sleeve are embedded with roller bearings, so that the screw rod can rotate freely; square holes are arranged on the upper and lower surfaces of the horizontal slider, the side length of the square hole is the same as the side length of the square cross section of the slider support frame, a threaded hole is arranged in the center of the horizontal slider, and the threaded hole is engaged with the external thread of the screw rod; a pair of cylindrical bodies symmetric about the center threaded hole are embedded in the horizontal slider, and an electric coil is wound on the surface of each cylindrical body; a horizontal slider is sleeved on each slider support frame and the screw rod, and the horizontal slider can only move in the axial direction of the screw rod.

[0009] The end of each screw rod is fixedly connected with a large bevel gear, the plane where the large bevel gear is located is perpendicular to the screw rod, three bevel gear baffles are welded on each large bevel gear, a small bevel gear is arranged between each two bevel gear baffles and engaged with the large bevel gear, and the three small bevel gears are uniformly distributed in the circumferential direction of the large bevel gear; a large blade is welded on each small bevel gear, the large bevel gear and the small bevel gear are contained in a hexagonal large impeller sleeve, and the large blade extends out of the side surface of the large impeller sleeve and is exposed to seawater.

[0010] A horizontal rod is hingedly connected to each horizontal slider on the side where a trapezoidal groove is formed in the rotatable sleeve, the horizontal rod can only move in the horizontal plane after being hingedly constrained, the two horizontal rods are cross arranged to form a swallow-tailed horizontal rod combination, the intersection point of the two horizontal rods is hingedly connected, a support rod is connected below the intersection point, and the support rod can slide up and down along the trapezoidal groove on the rotatable sleeve; the telescopic spring is horizontally arranged behind the intersection point of the two horizontal rods and is used for limiting the opening degree of the swallow-tailed horizontal rod combination; nine small impeller bearings are equidistantly welded on the upper surface of each horizontal rod, an electric coil is wound on the surface of the small impeller bearing, a small impeller that can be horizontally rotated is sleeved on the outside of the small impeller bearing, and a pair of magnetic poles are embedded in the cylindrical member in the middle of the small impeller.

[0011] The device for suppressing vibration and generating electricity of the attached ocean riser in a bionic swallow shape synchronously provides a method for suppressing vibration and generating electricity of the attached ocean riser in a bionic swallow shape synchronously. When the ocean current impacts the device for suppressing vibration and generating electricity of the attached ocean riser in a bionic swallow shape synchronously in any direction, the rotatable sleeve will automatically rotate, so that the side of the rotatable sleeve with the trapezoidal groove is located on the back flow surface, so as to ensure that the overall fluid resistance is minimum. Then, the large blades on both sides of the ocean riser rotate clockwise along with the ocean current, and drive the horizontal sliding block to move towards the ocean riser, and the included angle between the two horizontal rods downstream of the ocean riser becomes smaller, and the small impeller rotates along with the flow of the current and the movement of the horizontal rod. When the included angle between the two horizontal rods is small enough, the extension spring is compressed to the limit, starts to rebound and drives the horizontal sliding block to move away from the ocean riser, in turn drives the screw rod, the large bevel gear and the small bevel gear to rotate counterclockwise, so that the flow surface of the large blade changes. When the large blade rotates to the convex flow surface, the bevel gear baffle just blocks the small bevel gear, and the large blade starts to rotate counterclockwise under the flow of the ocean current, and drives the horizontal sliding block to continue to move away from the ocean riser. When the horizontal sliding block moves far enough, the spring force of the extension spring is greater than the fluid force of the ocean current impacting the large blade, the extension spring drives the horizontal sliding block to move towards the ocean riser, and the large blade changes to the concave flow surface again. Under the extension and contraction of the extension spring, the horizontal sliding block can reciprocate, and the rotating direction of the small impeller can also switch back and forth, forming a periodic motion mode.

[0012] The horizontal movement of the horizontal sliding block will disturb the development of the boundary layer of the ocean riser, the movement of the horizontal rod and the rotation of the small impeller will disturb the shedding of the vortex behind the ocean riser, and under the multiple disturbances, the vortex shedding behind the ocean riser is inhibited, the fluid acting force on the ocean riser is reduced, so that the vibration of the ocean riser is suppressed; the horizontal movement of the horizontal sliding block, the rotation of the screw rod and the small impeller will cut the magnetic induction lines, and generate current.

[0013] The device has the following advantages due to the above technical scheme:

[0014] 1. The device can realize the reciprocating movement of the horizontal sliding block and the horizontal rod under the action of the ocean current, disturb the flow field near the ocean riser, and realize the suppression of vortex-induced vibration of the ocean riser.

[0015] 2. The horizontal movement of the horizontal sliding block of the device, the rotation of the screw rod and the small impeller will generate current, realize the conversion of the ocean current kinetic energy into electric energy, and fully utilize the ocean current energy. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the device;

[0017] Figure 2 It is a schematic diagram of the variable rotating direction large blade of the device;

[0018] Figure 3 This is a schematic diagram of the small impeller structure of the device of the present invention;

[0019] Figure 4 This is a schematic diagram of the slider structure of the device of the present invention;

[0020] Figure 5 (a) is a schematic diagram of the wake structure behind the marine riser when no power generation and vibration damping devices are installed. Figure 5 (b) is a schematic diagram of the wake structure behind the marine riser after the installation of power generation and vibration damping devices;

[0021] The components include: 1. Marine riser; 2. Rotatable sleeve; 3. Trapezoidal groove; 4. Ring bearing; 5. Roller bearing; 6. Slider support frame; 7. Horizontal slider; 8. Screw; 9. Large blade; 10. Large impeller sleeve; 11. Horizontal rod; 12. Small impeller bearing; 13. Small impeller; 14. Support rod; 15. Telescopic spring; 16. Small bevel gear; 17. Large bevel gear; 18. Bevel gear baffle; 19. Magnetic pole; 20. Conductive coil. Detailed Implementation

[0022] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0023] like Figure 1 As shown, a biomimetic swallow-shaped synchronous vibration damping and power generation device attached to a marine riser 1 consists of three parts: a two-wing horizontal sliding truss, two steerable large impellers, and a scissor-shaped dovetail module. The two-wing horizontal sliding truss includes a rotatable sleeve 2, two pairs of slider support frames 6, a pair of screws 8, and a pair of horizontal sliders 7; each steerable large impeller includes a large impeller sleeve 10, a large bevel gear 17, three bevel gear baffles 18, three small bevel gears 16, and three large blades 9; the scissor-shaped dovetail module includes a support rod 14, two horizontal rods 11, a telescopic spring 15, eighteen small impeller bearings 12, and eighteen small impellers 13.

[0024] like Figure 1As shown, the toroidal bearing 4 is sleeved on the outer wall of the marine riser 1 with a spacing of the height of the rotatable sleeve 2, the rotatable sleeve 2 is a hollow cylindrical structure, the rotatable sleeve 2 is sleeved on the outer wall of the toroidal bearing 4, so that the rotatable sleeve 2 is free to rotate around the marine riser 1 in the circumferential direction; two pairs of slide block support frames 6 are symmetrically installed on the outer wall surface of the middle part of the rotatable sleeve 2, and the two pairs of slide block support frames 6 are in the same vertical plane; the slide block support frame 6 is an "L" shaped steel frame with a square cross section, the long end of which is perpendicular to the outer wall of the rotatable sleeve 2, the long ends of the slide block support frames 6 installed on each side are parallel to each other, and the short ends of the slide block support frames 6 installed on each side are arranged opposite to each other and connected to a circular ring connecting piece, so that the slide block support frames 6 installed on each side form a "U" shaped door frame, and a magnetic strip is embedded in the slide block support frame 6. A screw rod 8 is installed on the center line of the "U" shaped door frame formed by the slide block support frames 6 on each side, a wire is arranged in the screw rod 8, one end of the screw rod 8 is connected to the rotatable sleeve 2 through a roller bearing 5, and the other end of the screw rod 8 penetrates through the circular ring connecting piece of the slide block support frame 6 and extends into the inside of the large vane sleeve 10 and is fixedly connected to the large bevel gear 17, wherein the circular ring connecting piece of the slide block support frame 6 and the large vane sleeve 10 are both embedded with roller bearings 5, so that the screw rod 8 can rotate freely; square holes are processed on the upper and lower parts of the horizontal slide block 7, the side length of the square hole is the same as the side length of the square cross section of the slide block support frame 6, a threaded hole is processed in the center of the horizontal slide block 7, and the threaded hole is engaged with the external thread of the screw rod 8; a pair of cylindrical bodies symmetric about the center threaded hole are embedded in the horizontal slide block 7, and an electric coil 20 is wound on the surface of each cylindrical body, as shown in Figure 2 As shown, a horizontal slide block 7 is sleeved on the slide block support frame 6 and the screw rod 8 on each side, and the horizontal slide block 7 can only move in the axial direction of the screw rod 8.

[0025] As shown in Figure 3 Each end of the screw rod 8 is fixedly connected with a large bevel gear 17, the plane where the large bevel gear 17 is located is perpendicular to the screw rod 8, three bevel gear baffles 18 are welded on each large bevel gear 17, a small bevel gear 16 is arranged between each two bevel gear baffles 18 and engaged with the large bevel gear 17, and the three small bevel gears 16 are uniformly distributed along the circumferential direction of the large bevel gear 17; a large vane 9 is welded on each small bevel gear 16, the large bevel gear 17 and the small bevel gear 16 are contained in a hexagonal large vane sleeve 10, and the large vane 9 extends out of the side of the large vane sleeve 10 and is exposed in the seawater.

[0026] Each horizontal slider 7 is hinged with a horizontal rod 11 on one side of the trapezoidal groove 3 of the rotatable sleeve 2, the horizontal rod 11 can only move in the horizontal plane after being hinged, the two horizontal rods 11 are arranged in cross shape, forming a swallow-tailed horizontal rod 11 combination; the intersection of the two horizontal rods 11 is hinged, and a support rod 14 is connected below the intersection, the support rod 14 can slide up and down along the trapezoidal groove 3 on the rotatable sleeve 2; the telescopic spring 15 is horizontally installed behind the intersection of the two horizontal rods 11, used to limit the opening degree of the swallow-tailed horizontal rod 11 combination; the upper surface of each horizontal rod 11 is equally welded with nine small impeller bearings 12, the surface of the small impeller bearing 12 is wound with a conductive coil 20, the small impeller bearing 12 is externally sleeved with a small impeller 13 which can rotate horizontally, and a pair of magnetic poles 19 is embedded in the middle cylindrical member of the small impeller 13, as shown in Figure 4 .

[0027] The bionic swallow synchronous vibration suppression and power generation device attached to the ocean riser 1 provides a method for bionic swallow synchronous vibration suppression and power generation attached to the ocean riser 1. When the sea current impacts the bionic swallow synchronous vibration suppression and power generation device attached to the ocean riser 1 in any direction, the rotatable sleeve 2 will automatically rotate, so that the side of the rotatable sleeve 2 with the trapezoidal groove 3 is located on the back flow surface, so as to ensure that the overall fluid resistance is minimized; then, the large blades 9 on both sides of the ocean riser 1 rotate clockwise with the sea current, and drive the horizontal slider 7 to move towards the ocean riser 1, at the same time, the included angle between the two horizontal rods 11 downstream of the ocean riser 1 becomes smaller, and the small impeller 13 rotates with the flow of the flow and the movement of the horizontal rod 11; when the included angle between the two horizontal rods 11 is small enough, the telescopic spring 15 is compressed to the limit, starts to rebound and drives the horizontal slider 7 to move away from the ocean riser 1, in turn drives the screw rod 8, the large bevel gear 17 and the small bevel gear 16 to rotate counterclockwise, so that the flow surface of the large blade 9 changes; when the large blade 9 rotates to the convex flow surface, the bevel gear baffle 18 also just clamps the small bevel gear 16, and the large blade 9 starts to rotate counterclockwise under the flow of the sea current, and drives the horizontal slider 7 to continue to move away from the ocean riser 1; when the distance of the horizontal slider 7 is far enough, the spring force of the telescopic spring 15 is greater than the fluid force of the sea current impacting the large blade 9, the telescopic spring 15 drives the horizontal slider 7 to move towards the ocean riser 1, and the large blade 9 changes back to the concave flow surface again, as shown in Figure 3 . Under the extension and contraction of the telescopic spring 15, the horizontal slider 7 can reciprocate, and the rotation direction of the small impeller can also switch back and forth, forming a periodic motion mode.

[0028] As shown in Figure 5As shown, the horizontal movement of the horizontal slider 7 will disturb the boundary layer development of the marine riser 1, the movement of the horizontal rod 11 and the rotation of the small impeller 13 will disturb the shedding of the vortex behind the marine riser 1, and under the multiple disturbances, the vortex shedding behind the marine riser 1 is inhibited, the fluid force acting on the marine riser 1 is reduced, thereby achieving the effect of inhibiting the vibration of the marine riser 1; the horizontal movement of the horizontal slider 7, the rotation of the screw rod 8 and the small impeller 13 will all cut the magnetic induction lines and generate current.

[0029] Embodiment:

[0030] When installing the device, first, the two circular ring bearings 4 are sleeved on the outer wall of the marine riser 1 with a spacing of the height of the rotatable sleeve 2, and then the rotatable sleeve 2 is installed on the circular ring bearing.

[0031] Then, the two horizontal sliders 7 are respectively sleeved on the two pairs of slider support frames 6, and the two pairs of slider support frames 6 are symmetrically and fixedly installed on the outer wall surfaces on both sides of the middle part of the rotatable sleeve 2, and the two pairs of slider support frames 6 are in the same vertical plane. Each screw rod 8 is sequentially threaded through the circular ring-shaped connecting piece of the slider support frame 6 and the horizontal slider 7, and is connected to the outer wall surface of the middle part of the rotatable sleeve 2 through the roller bearing 5.

[0032] Secondly, the large impeller sleeve 10 with a large bevel gear 17 and three small bevel gears 16 is sleeved into the screw rod 8, and the distal end of the screw rod 8 is fixedly connected with the large bevel gear 17.

[0033] Then, the two horizontal rods 11 are respectively hingedly installed on the horizontal sliders 7, the two horizontal rods 11 are crossed, and the crossing point is hingedly connected. The telescopic spring 15 is horizontally installed behind the crossing point of the two horizontal rods 11, a support rod 14 is hingedly connected below the crossing point of the two horizontal rods 11, and the other end of the support rod 14 is hingedly installed in the trapezoidal groove 3.

[0034] Finally, nine small impeller bearings 12 are equally welded on each horizontal rod 11, conductive coils are wound on each small impeller bearing 12, magnetic poles 19 are embedded in each small impeller 13, and nine small impellers 13 are sequentially sleeved on the small impeller bearings 12.

[0035] After installation, when the sea current impacts the attached marine riser 1 in any direction, the rotatable sleeve 2 automatically rotates, so that the side of the rotatable sleeve 2 with the trapezoidal groove 3 is located on the back flow surface, to ensure that the overall fluid resistance is minimized; then, the large blades 9 on both sides of the marine riser 1 rotate clockwise with the sea current, and drive the horizontal slider 7 to move towards the marine riser 1, while the angle between the two horizontal rods 11 downstream of the marine riser 1 becomes smaller, and the small impeller 13 rotates with the movement of the horizontal rod 11 and the incoming flow; when the angle between the two horizontal rods 11 is small enough, the extension spring 15 is compressed to the limit, starts to rebound and drives the horizontal slider 7 to move away from the marine riser 1, in turn drives the screw 8, the large bevel gear 17 and the small bevel gear 16 to rotate counterclockwise, so that the flow surface of the large blade 9 changes; when the large blade 9 rotates to the convex flow surface, the bevel gear baffle 18 also just clamps the small bevel gear 16, and the large blade 9 starts to rotate counterclockwise under the flow of the sea current, and makes the horizontal slider 7 continue to move away from the marine riser 1; when the horizontal slider 7 moves far enough, the spring force of the extension spring 15 is greater than the fluid force of the sea current impacting the large blade 9, the extension spring 15 drives the horizontal slider 7 to move towards the marine riser 1, and the large blade 9 changes back to the concave flow surface again. Under the extension and contraction of the extension spring 15, the horizontal slider 7 reciprocates, and the rotation direction of the small impeller also switches back and forth, forming a periodic motion mode. The horizontal movement of the horizontal slider 7 will disturb the boundary layer development of the marine riser 1, and the movement of the horizontal rod 11 and the rotation of the small impeller 13 will disturb the shedding of the vortex behind the marine riser 1, so that the vortex shedding behind the marine riser 1 is inhibited under multiple disturbances, the fluid force acting on the marine riser 1 is reduced, thereby achieving the effect of suppressing the vibration of the marine riser 1; the horizontal movement of the horizontal slider 7, the rotation of the screw 8 and the small impeller 13 will all cut the magnetic induction lines and generate current. Thus, the bionic swallow-shaped device simultaneously realizes the functions of vortex-induced vibration suppression and sea current power generation.

Claims

1. A device for suppressing vibration and generating electricity by imitating the synchronous vibration of a swallow, which is used for attaching a marine riser and is composed of three parts, i.e., a horizontal sliding truss of two wings, two large reversible impellers, and a scissor-shaped swallow tail module; the horizontal sliding truss of two wings comprises a rotatable sleeve (2), two pairs of sliding block support frames (6), a pair of screw rods (8), and a pair of horizontal sliding blocks (7); each large reversible impeller comprises a large impeller sleeve (10), a large bevel gear (17), three bevel gear baffles (18), three small bevel gears (16), and three large blades (9); the scissor-shaped swallow tail module comprises a support rod (14), two horizontal rods (11), an extension spring (15), eighteen small impeller bearings (12), and eighteen small impellers (13); a circular ring bearing (4) is sleeved on the outer wall of the marine riser (1) at a height of one rotatable sleeve (2), the rotatable sleeve (2) is a hollow cylinder structure, and the rotatable sleeve (2) is sleeved outside the circular ring bearing (4), so that the rotatable sleeve (2) can freely rotate around the marine riser (1) in the circumferential direction; two pairs of sliding block support frames (6) are symmetrically installed on the outer wall surface of the middle part of the rotatable sleeve (2), and the two pairs of sliding block support frames (6) are in the same vertical plane; the sliding block support frame (6) is an "L"-shaped steel frame with a square cross section, the long end of which is perpendicular to the outer wall of the rotatable sleeve (2), the long ends of the pair of sliding block support frames (6) installed on each side are parallel to each other, and the short ends of the pair of sliding block support frames (6) installed on each side are arranged opposite to each other and connected to a circular ring-shaped connecting piece, so that the pair of sliding block support frames (6) installed on each side form a "U"-shaped door frame, and the sliding block support frame (6) is embedded with a magnetic strip; a screw rod (8) is installed on the center line of the "U"-shaped door frame formed by the pair of sliding block support frames (6) on each side, the screw rod (8) is arranged with a wire inside, one end of the screw rod (8) is connected to the rotatable sleeve (2) through a roller bearing (5), and the other end of the screw rod (8) penetrates through the circular ring-shaped connecting piece of the sliding block support frame (6) and extends into the inside of the large impeller sleeve (10) to be fixedly connected with the large bevel gear (17), wherein, The circular ring connecting piece of the slider support frame (6) and the large impeller sleeve (10) are both embedded with roller bearings (5), so that the screw rod (8) can rotate freely; the horizontal slider (7) is processed with square holes on the upper and lower sides, the side length of the square hole is the same as the side length of the square cross section of the slider support frame (6), the horizontal slider (7) is processed with an inner threaded hole in the center, the inner threaded hole is engaged with the outer thread of the screw rod (8); the horizontal slider (7) is embedded with a pair of cylinders symmetrically about the central inner threaded hole, the surface of each cylinder is wound with an electric coil (20); the upper surface of each horizontal rod (11) is equidistantly welded with nine small impeller bearings (12), the surface of the small impeller bearing (12) is wound with an electric coil (20), the small impeller bearing (12) is externally sleeved with a small impeller (13) which can horizontally rotate, the middle cylindrical member of the small impeller (13) is embedded with a pair of magnetic poles (19); characterized in that: a horizontal slider (7) is sleeved on the slider support frame (6) and the screw rod (8) on each side, the horizontal slider (7) can only move axially along the screw rod (8); the end of each screw rod (8) is fixedly connected with a large bevel gear (17), the plane where the large bevel gear (17) is located is perpendicular to the screw rod (8), three bevel gear baffles (18) are welded on each large bevel gear (17), there is a small bevel gear (16) between every two bevel gear baffles (18) and engaged with the large bevel gear (17), the three small bevel gears (16) are uniformly distributed along the circumference of the large bevel gear (17); a large blade (9) is welded on each small bevel gear (16), the large bevel gear (17) and the small bevel gear (16) are contained in the six-prism large impeller sleeve (10), and the large blade (9) extends from the side of the large impeller sleeve (10) and is exposed in seawater; each horizontal slider (7) is hinged with a horizontal rod (11) on the side where the trapezoidal groove (3) of the rotatable sleeve (2) is opened, the horizontal rod (11) can only move in the horizontal plane after being hinged, the two horizontal rods (11) are cross arranged to form a swallow-tailed horizontal rod (11) combination; the intersection of the two horizontal rods (11) is hingedly connected, a support rod (14) is connected below the intersection, the support rod (14) can slide up and down along the trapezoidal groove (3) on the rotatable sleeve (2); the telescopic spring (15) is horizontally installed behind the intersection of the two horizontal rods (11) and is used for limiting the opening degree of the swallow-tailed horizontal rod (11) combination.

2. A method for simultaneously suppressing vibration and generating electricity by using the bionic swallow-shaped device for suppressing vibration and generating electricity attached to a marine riser according to claim 1, characterized in that: When the current impacts the bionic swallow synchronous vibration suppression and power generation device attached to the marine riser (1) in any direction, the rotatable sleeve (2) will automatically rotate, so that the side of the rotatable sleeve (2) with the trapezoidal groove (3) is located on the back flow surface, so as to ensure that the overall fluid resistance is minimized; the large blades (9) on both sides of the marine riser (1) rotate clockwise with the current, and drive the horizontal slider (7) to move towards the marine riser (1); at the same time, the included angle between the two horizontal rods (11) downstream of the marine riser (1) becomes smaller, and the small impeller (13) rotates with the flow of the current and the movement of the horizontal rod (11); when the included angle between the two horizontal rods (11) is small enough, the extension spring (15) is compressed to the limit, starts to rebound and drives the horizontal slider (7) to move away from the marine riser (1), in turn drives the screw (8), the large bevel gear (17) and the small bevel gear (16) to rotate counterclockwise, so that the flow surface of the large blade (9) changes; when the large blade (9) rotates to the convex flow surface, the bevel gear baffle (18) also just clamps the small bevel gear (16), the large blade (9) starts to rotate counterclockwise under the flow of the current, and drives the horizontal slider (7) to continue to move away from the marine riser (1); when the horizontal slider (7) moves far enough, the spring force of the extension spring (15) is greater than the fluid force of the current impacting the large blade (9), the extension spring (15) drives the horizontal slider (7) to move towards the marine riser (1), and the large blade (9) changes back to the concave flow surface again; under the extension and contraction of the extension spring (15), the horizontal slider (7) can reciprocate, and the rotation direction of the small impeller can also switch back and forth, forming a periodic motion mode; the horizontal movement of the horizontal slider (7) will disturb the development of the boundary layer of the marine riser (1), the movement of the horizontal rod (11) and the rotation of the small impeller (13) will disturb the shedding of the vortex behind the marine riser (1), and multiple disturbances will inhibit the vortex shedding behind the marine riser (1), so that the fluid force acting on the marine riser (1) is reduced, thereby achieving the effect of suppressing the vibration of the marine riser (1); the horizontal movement of the horizontal slider (7), the rotation of the screw (8) and the small impeller (13) will cut the magnetic induction lines, and generate current.

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