A fluid self-adaptive vortex-induced vibration electromagnetic power generation device

Abstract

The invention discloses a fluid adaptive vortex-induced vibration electromagnetic power generation device, comprising an outer frame, the bottom of the outer frame is rotatably connected to a cylindrical support rod, an airfoil is arranged on the side arm of the cylindrical support rod, and a power generation unit is arranged in the outer frame, the power generation unit comprises a cylindrical blunt body, a guide rod, a direct-pressure electrorheological fluid damper, a permanent magnet, a metal sheet and a hollow cylinder; the cylindrical blunt body is suspended and vertically arranged in the outer frame, the side wall of the cylindrical blunt body is fixedly connected to one end of a horizontally arranged guide rod, the other end of the guide rod passes through a hollow cylinder, and the part of the guide rod located in the hollow cylinder is fixed with a cylindrical permanent magnet and a metal sheet; a coil is wound on the hollow cylinder; the top and bottom of the hollow cylinder are each connected to the outer frame through a cylindrical connecting rod; the guide rod generates axial movement under the vibration drive of the cylindrical blunt body, and the two cylindrical connecting rods generate vortex-induced vibration under the excitation of the fluid; the cylindrical blunt body is connected to the outer frame through the horizontally arranged direct-pressure electrorheological fluid damper.

Description

Technical Field

[0001] The present invention relates to the field of vortex-induced vibration electromagnetic power generation devices, and in particular to a fluid self-adaptive vortex-induced vibration electromagnetic power generation device. Background Art

[0002] Existing underwater or surface equipment, such as underwater robots (also known as "underwater drones"), can be widely used in many fields, including fish farming, ship maintenance, sightseeing diving, marine exploration and exploration, ocean monitoring, biological research, underwater navigation, underwater rescue, pipeline inspection, etc., with huge industry demand and broad development prospects. Currently, most of their energy supply methods are external cables or built-in batteries. However, these energy supply methods still have some problems:

[0003] 1. There are limits on the diving depth of underwater robots, making it impossible for them to operate stably in deep waters.

[0004] 2. Underwater robots are highly dependent on external input power and cannot independently convert energy, resulting in poor reliability and high cost.

[0005] 3. When the underwater robot is working underwater, it is unable to recover vibration energy. The outer frame will generate vortex-induced vibration, which will affect the operation of the device and cause energy consumption.

[0006] 4. The power supply is single and cannot be flexibly changed according to work needs.

[0007] 5. In order to meet the electrical energy required for the underwater robot to work, the equipment is heavy and has a complex structure, which greatly restricts its work and consumes a lot of energy.

[0008] 6. The energy supply device cannot automatically adjust according to changes in the underwater robot's environment and cannot guarantee continuous and stable energy supply under multiple working conditions.

[0009] 7. Underwater robots require continuous power input or frequent battery replacement depending on their working conditions, and cannot operate independently underwater for long periods of time. Summary of the Invention

[0010] The purpose of the present invention is to solve the problems existing in the energy supply of underwater or surface equipment, such as underwater robots. According to the work requirements, a device is disclosed that can achieve fluid adaptation and use the principle of vortex-induced vibration to continuously and stably generate electrical energy, thereby ensuring that the equipment has the ability to perform complex work for a long time under multiple working conditions.

[0011] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0012] The present invention provides a fluid adaptive vortex-induced vibration electromagnetic power generation device, comprising an outer frame, the bottom of the outer frame being rotatably connected to a cylindrical support rod, wing-shaped plates being provided on the side arms of the cylindrical support rod, and a power generation unit being provided within the outer frame, the power generation unit mainly comprising a cylindrical blunt body, a guide rod, a direct pressure electrorheological fluid damper, a permanent magnet, a metal sheet, and a hollow cylinder;

[0013] The cylindrical blunt body is suspended vertically in an outer frame, the side wall of the cylindrical blunt body is fixedly connected to one end of a horizontally arranged guide rod, the other end of the guide rod passes through a hollow cylinder, and the part of the guide rod located in the hollow cylinder is fixed with a cylindrical permanent magnet and an iron sheet; a coil is wound on the hollow cylinder; the top and bottom of the outer ring of the hollow cylinder are each connected to the outer frame through a cylindrical connecting rod; the guide rod generates axial movement under the vibration drive of the cylindrical blunt body, and the two cylindrical connecting rods generate vortex-induced vibration under the excitation of the fluid; the cylindrical blunt body is connected to the outer frame through a horizontally arranged direct-pressure electrorheological fluid damper.

[0014] As a further technical solution, two direct pressure electrorheological fluid dampers are provided, and the two direct pressure electrorheological fluid dampers are symmetrically arranged on the side wall of the cylindrical blunt body.

[0015] As a further technical solution, a displacement sensor is arranged on the top of the cylindrical bluff body.

[0016] As a further technical solution, the power generation unit includes multiple ones.

[0017] As a further technical solution, the position where the guide rod contacts the hollow cylinder is supported by a flange-type linear bearing.

[0018] As a further technical solution, the bottom of the cylindrical support rod is rotatably connected to a fixed base.

[0019] As a further technical solution, the airfoil plate is a flat-convex airfoil, connected to the cylindrical support rod through a cantilever beam.

[0020] The beneficial effects of the above embodiments of the present invention are as follows:

[0021] 1. The present invention achieves fluid-adaptive vortex-induced vibration electromagnetic power generation through a set of modules that do not require external energy supply. The overall structure is simple and easy to operate. Using the principle of vortex-induced vibration, asymmetric vortex shedding occurs on both sides of the incoming flow surface of the cylindrical blunt body, inducing the cylindrical blunt body to vibrate perpendicular to the incoming flow direction, thereby driving the guide rod to drive the permanent magnet to axial reciprocating motion. This device can generate alternating current for use in underwater or surface equipment by changing the magnetic flux in the coil.

[0022] 2. In this device, the airfoil can drive the device to adapt to the flow direction of the fluid through the cylindrical support rod, so that its power generation unit is always in the optimal power generation position, realizing the flow direction adaptation of the power generation device.

[0023] 3. In this device, a direct pressure electrorheological fluid damper is installed at each end of the cylindrical blunt body. When the fluid flow rate is fast, the cylindrical blunt body tends to vibrate greatly, and the force applied to the damper piston is large. The spring is also subjected to the same force. The spring applies force to the piezoelectric ceramic through the partition below. After the piezoelectric ceramic is subjected to force, it supplies voltage to the positive and negative electrodes of the damping cylinder. The viscosity of the electrorheological fluid increases under the stimulation of the electric field, preventing the piston from pushing the electrorheological fluid through the small holes on the damping inner cylinder, thereby applying a certain amount of blocking force to the cylindrical blunt body to prevent collisions between the various mechanisms. When the liquid flow rate is not fast, During fast flow, the cylindrical body's vibration amplitude is small, exerting little force on the damper piston and experiencing minimal damper retarding force. The damper piston's compression spring moves extensively within the damper cylinder. A non-contact displacement sensor is mounted on the upper end of the cylindrical body, away from the end cap. This sensor automatically detects the distance between the cylindrical body and the hollow housing connected to the electrorheological fluid damper. When the cylindrical body approaches or moves away from it by a certain axial displacement, the sensor automatically generates an electrical signal, causing the direct-pressure electrorheological fluid damper to adjust accordingly. This allows the device to independently detect the axial movement of its motion mechanism. This ensures effective movement within the permissible range at both high and low flow rates, enabling the generator to adapt to flow rates and achieve true self-regulation. This enables the device to continuously output electrical energy over long periods of time and under multiple operating conditions.

[0024] 4. This device is based on the principle of vortex-induced vibration. When fluid flows through a cylindrical blunt body, the vortex-induced vibration causes periodic asymmetric vortex shedding on both sides of the incoming flow surface. The blunt body is subjected to lateral forces in the direction of the flow and perpendicular to the flow. These lateral forces act on the blunt body, causing it to deform and induce its own vibration. This in turn drives the device's motion mechanism to move axially, driving the permanent magnet to reciprocate in the coil, continuously changing the magnetic flux in the coil, and thus generating an induced current. An iron sheet is installed in the middle of the permanent magnet in this device to change the distribution of magnetic lines of force. This makes the change in the coil's magnetic flux more pronounced when the permanent magnet moves, generating a larger induced current, thereby increasing the stability of the device's output power.

[0025] 5. In this device, the vortex-induced vibration generated by the cylindrical support rod and the cylindrical connecting rod in the oncoming flow is transmitted to the power generation unit through the device frame structure, thereby strengthening the vibration of the power generation unit and improving the power generation capacity of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0027] Figure 1 This is an axonometric drawing of the present invention.

[0028] Figure 2 It is a front view of the present invention.

[0029] Figure 3 It is a left view of the present invention.

[0030] Figure 4 It is a right side view of the present invention.

[0031] Figure 5 It is a top view of the present invention.

[0032] Figure 6 Schematic diagram of the power generation unit of the present invention.

[0033] Figure 7 Schematic diagram of the hollow shell of the power generation unit of the present invention.

[0034] Figure 8 It is a front view of the power generation unit of the present invention.

[0035] Figure 9 It is a left view of the power generation unit of the present invention.

[0036] Figure 10 It is a right side view of the power generation unit of the present invention.

[0037] Figure 11 It is a top view of the power generation unit of the present invention.

[0038] Figure 12 It is a front cross-sectional view of the power generation unit of the present invention.

[0039] Figure 13 It is a top cross-sectional view of the power generation unit of the present invention.

[0040] Figure 14 Schematic diagram of the hollow outer frame of the device of the present invention.

[0041] Figure 15 Schematic diagram of the plano-convex airfoil of the present invention.

[0042] Figure 16 This is a cross-sectional view of the direct pressure electrorheological fluid damper of the present invention.

[0043] In the figure: 1 outer frame, 2 wing plate, 3 cylindrical support rod, 4 fixed base, 5 frame column, 6 cylindrical connecting rod, 7 cylindrical shell, 8 end cover, 9 hollow cylinder, 10 coil, 11 flange linear bearing, 12 guide rod, 13 permanent magnet, 14 iron sheet, 15 cylindrical blunt body, 16 direct pressure electrorheological fluid damper, 17 non-contact displacement sensor, 18 cantilever beam. DETAILED DESCRIPTION

[0044] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly specified in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] Combine Figures 1 to 16 The present invention provides a fluid adaptive vortex-induced vibration electromagnetic power generation device, the overall structure of which is as follows Figure 1 As shown, it includes four parts: a flow-facing vibration module, a self-regulating module, an electromagnetic induction module, and a support module. The power generation device places the entire module in flowing water. The airfoil plate senses the flow direction and drives the device to face the flow through the cylindrical support rod, so that the cylindrical blunt body of the power generation unit faces the incoming flow direction. According to the principle of vortex-induced vibration, the cylindrical blunt body generates irregular vortex shedding on both sides of the flow-facing surface, thereby driving the guide rod and the permanent magnet to perform axial movement. The axial movement is then controlled by the self-regulating module to make the change of the coil magnetic flux stable and continuous, so that the device outputs a more stable current.

[0047] The above-mentioned oncoming flow vibration module is mainly composed of an airfoil plate 2, a cylindrical support rod 3, a cylindrical blunt body 15, a cylindrical connecting rod 6, etc.

[0048] The self-regulating module is mainly composed of a non-contact displacement sensor 17 and a direct pressure electrorheological fluid damper 16;

[0049] The electromagnetic induction module is mainly composed of a permanent magnet 13, an iron sheet 14, a hollow cylinder 9, and a coil 10;

[0050] The support module is mainly composed of a hollow outer frame 1 , a hollow outer shell 5 , and a fixed base 4 .

[0051] The connection relationship and corresponding position relationship of each component are as follows:

[0052] Further specific combinations such as Figure 12As shown, the device is mainly composed of a flow-facing vibration module, a self-adjusting module and an electromagnetic induction module, and is specifically composed of a hollow outer frame 1, an airfoil plate 2, a cylindrical support rod 3, a cylindrical blunt body 15, a cylindrical connecting rod 6, a guide rod 12, a non-contact displacement sensor 17, a direct pressure electrorheological fluid damper 16, a permanent magnet 13, an iron sheet 14, a hollow cylinder 9, a coil 10, etc.

[0053] The center of the bottom of the hollow outer frame 1 is mounted on the top of the cylindrical support rod 3, and the hollow outer frame 1 and the cylindrical support rod 3 are rotatably connected; the bottom of the cylindrical support rod 3 is mounted on the fixed base 4, and the wing plate 2 is fixed to the side wall of the cylindrical support rod 3 by the cantilever beam 18; the function of the wing plate 2 is mainly to automatically sense the incoming flow direction and drive the device to rotate to the optimal working position through the cylindrical support rod 3;

[0054] A plurality of power generation units are provided within the hollow outer frame 1. In the drawings shown in this embodiment, two power generation units are installed. Each power generation unit includes a cylindrical blunt body 15, a cylindrical connecting rod 6, a guide rod 12, a non-contact displacement sensor 17, a direct pressure electrorheological fluid damper 16, a permanent magnet 13, an iron sheet 14, a hollow cylinder 9, and a coil 10. Since the structure of each power generation unit is the same, one of them will be used as an example for description below.

[0055] The cylindrical blunt body 15 is suspended vertically in the hollow outer frame 1, and the side wall of the cylindrical blunt body 15 is connected to one end of a horizontally arranged guide rod 12 by welding. The other end of the guide rod 12 passes through a hollow cylinder 9. The position where the guide rod 12 contacts the hollow cylinder 9 is supported by a flange-type linear bearing 11, and the part of the guide rod 12 located in the hollow cylinder 9 is fixed with a cylindrical permanent magnet 13 and an iron sheet 14; the cylindrical permanent magnet 13 and the iron sheet 14 are directly strung on the guide rod 12 and glued and fixed. The permanent magnet 13 and The iron sheets 14 are directly contacted and stick together by magnetic force instead of being fixed separately. A coil 10 is wound on the hollow cylinder 9. The top and bottom of the hollow cylinder 9 are each connected to the hollow outer frame 1 through a cylindrical connecting rod 6. The guide rod 12 generates axial (horizontal movement along the axis of the guide rod) motion under the vibration drive of the cylindrical blunt body 15 and the lubrication of the flange-type linear bearing 11, and the two symmetrically distributed cylindrical connecting rods 6 will also generate vortex-induced vibration when excited by the fluid, further improving the power generation capacity of the device.

[0056] like Figure 12 、 Figure 13As shown, a non-contact displacement sensor 17 is also installed on the top of the cylindrical bluff body 15. The non-contact displacement sensor 17 is directly installed on the side of the upper end surface of the cylindrical bluff body 15 away from the end cover. Direct-pressure electrorheological fluid dampers 16 are horizontally installed at symmetrical positions at the upper and lower ends of the cylindrical bluff body 15. One end of the direct-pressure electrorheological fluid damper 16 is connected to the side wall of the cylindrical bluff body 15, and the other outer end is connected to the column 5. The column 5 is installed on the hollow outer frame 1. When tension or pressure is applied to the cylindrical bluff body 15, it expands and contracts to complete the electrorheological fluid; the direct-pressure electrorheological fluid damper 16 mainly serves to make the movement of the cylindrical bluff body 15 more stable.

[0057] Furthermore, the hollow outer frame 1 and the column 5 are detachably connected, so that the direct pressure electrorheological fluid damper 16 can be easily disassembled and replaced according to the actual water flow conditions.

[0058] Furthermore, the unit hollow shell 5 is connected to the inner cylindrical shell 7 of the hollow cylinder 9 by welding through a cylindrical connecting rod 6 .

[0059] Furthermore, the hollow outer frame 1 is connected to the cylindrical support rod 3 via a tangential key, so that the two can only rotate but cannot move.

[0060] Furthermore, the above-mentioned cylindrical connecting rod 6 is located inside each power generation unit, and two identical cylindrical connecting rods 6 are symmetrically distributed along the circumference of the cylindrical shell, so that the cylindrical shell is placed in the middle of the power generation unit.

[0061] Furthermore, the device frame 1 structure is made of 304 stainless steel.

[0062] Furthermore, the cylindrical shell 7, the left and right end covers 8, and the cylindrical connecting rod 6 are made of 6061-t4 aluminum alloy material, which has high yield strength and strong corrosion resistance, and the device has good pressure resistance and water tightness.

[0063] Furthermore, the cylindrical bluff body 15 is made of nylon material.

[0064] Furthermore, the cylindrical support rod 3 and the fixed base 4 are matched with bearings to form a bluff body that can rotate freely.

[0065] Furthermore, the airfoil plate 2 is a flat-convex airfoil, and is connected to the cylindrical support rod 3 through a cantilever beam.

[0066] The working steps of the fluid adaptive vortex-induced vibration electromagnetic power generation device of the present invention are briefly described as follows:

[0067] The number of power generation units required for work is installed in the hollow outer frame 1, and the entire device is placed in flowing water. The airfoil 2 automatically senses the direction of the incoming flow and drives the device to rotate to the optimal working position through the cylindrical support rod 3. The cylindrical blunt body 15 of each power generation unit generates vortex-induced vibration under the action of the fluid, and asymmetric vortex shedding occurs on both sides of the incoming flow surface of the cylindrical blunt body 15, inducing the cylindrical blunt body 15 to generate vibration perpendicular to the incoming flow direction, thereby driving the guide rod 12 and the permanent magnet 13 to move axially. The axial movement of the permanent magnet 13 in the coil 10 changes the magnetic flux of the coil 10, and the coil 10 generates an induced current based on the principle of electromagnetic induction; the electrorheological fluid damper 16 can automatically adjust according to the amplitude of movement The damping size is adjusted so that the device's weak movement at low flow rates is not blocked, and the violent movement at high flow rates is limited, thereby achieving flow rate adaptation of the device, and the device's working stability and reliability are higher. The non-contact displacement sensor 17 can detect the distance from the cylindrical blunt body 15 to the hollow shell 5 of the unit on the side connected to the damper, thereby making corresponding adjustments to the electrorheological fluid damper 16, limiting the axial movement of the device within the allowable range, and will not damage the mechanism. The cylindrical support rod 3 connected to the airfoil 2 generates vortex-induced vibration after encountering the flow, and transmits the vibration to the power generation unit through the hollow outer frame 1, which plays a role in strengthening the vibration, and ultimately enables the device to output continuous, reliable and stable current.

[0068] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A fluid adaptive vortex-induced vibration electromagnetic power generation device, characterized in that: The outer frame comprises an outer frame, the bottom of which is rotatably connected to a cylindrical support rod, an airfoil plate is provided on the side arm of the cylindrical support rod, and a power generation unit is provided in the outer frame, wherein the power generation unit comprises a cylindrical blunt body, a guide rod, a direct pressure electrorheological fluid damper, a permanent magnet, a metal sheet and a hollow cylinder; The cylindrical blunt body is suspended vertically in an outer frame, the side wall of the cylindrical blunt body is fixedly connected to one end of a horizontally arranged guide rod, the other end of the guide rod passes through a hollow cylinder, and the part of the guide rod located in the hollow cylinder is fixed with a cylindrical permanent magnet and a metal sheet; a coil is wound on the hollow cylinder; the top and bottom of the outer ring of the hollow cylinder are each connected to the outer frame through a cylindrical connecting rod; the guide rod generates axial movement under the vibration drive of the cylindrical blunt body, and the two cylindrical connecting rods generate vortex-induced vibration under the excitation of the fluid; the cylindrical blunt body is connected to the outer frame through a horizontally arranged direct-pressure electrorheological fluid damper.

2. The fluid adaptive vortex-induced vibration electromagnetic power generation device according to claim 1, characterized in that: Two direct-pressure electrorheological fluid dampers are provided, and the two direct-pressure electrorheological fluid dampers are symmetrically arranged on the side wall of the cylindrical blunt body.

3. The fluid adaptive vortex-induced vibration electromagnetic power generation device according to claim 1, characterized in that: A displacement sensor is set on the top of the cylindrical bluff body.

4. The fluid adaptive vortex-induced vibration electromagnetic power generation device according to claim 1, characterized in that: The power generation unit comprises a plurality of units.

5. The fluid adaptive vortex-induced vibration electromagnetic power generation device according to claim 1, characterized in that: The guide rod is supported by a flange-type linear bearing at the point where it contacts the hollow cylinder.

6. The fluid adaptive vortex-induced vibration electromagnetic power generation device according to claim 1, characterized in that: The bottom of the cylindrical support rod is rotatably connected to a fixed base.

7. The fluid adaptive vortex-induced vibration electromagnetic power generation device according to claim 1, characterized in that: The airfoil plate is a flat-convex airfoil and is connected to the cylindrical support rod through a cantilever beam.

8. The fluid adaptive vortex-induced vibration electromagnetic power generation device according to claim 1, characterized in that: The cylindrical bluff body is made of nylon material.

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