Piezoelectric nanometer-electromagnetic power generation composite omnidirectional flow energy power generation device

Abstract

The invention discloses a piezoelectric nanometer-electromagnetic power generation composite omnidirectional flow energy power generation device which comprises an electromagnetic power generation mechanism, a coupler, a transmission shaft, an arc-shaped flow chamber structure and a mounting frame structure. The electromagnetic power generation mechanism is connected with the transmission shaft through a coupler; the mounting frame structure comprises a first trapezoidal arm and a second trapezoidal arm which are arranged on the transmission shaft at an interval, and the arc-shaped flow chamber structure is fixedly connected with the transmission shaft through the first trapezoidal arm and the second trapezoidal arm; a piezoelectric nano power generation structure is arranged in the cavity structure; the piezoelectric nanometer power generation structure comprises a cylinder structure and a piezoelectric power generation component, and the cylinder structure is connected with the piezoelectric power generation component in a clamped mode through an formed clamping groove structure. An arc-shaped flow chamber structure in the omni-directional flow energy power generation structure is driven by flowing fluid to drive a transmission shaft to rotate, and the transmission shaft drives an electromagnetic power generation mechanism to rotate through a coupler to generate power. According to the invention, the problems of single technical efficiency bottleneck and insufficient omnidirectional response capability of the current fluid energy collection technology are solved.

Description

Technical Field

[0001] This invention relates to the field of renewable energy technology, and in particular to an omnidirectional flow energy power generation device that combines piezoelectric nanoparticles and electromagnetic power generation. Background Technology

[0002] Fluid energy (such as water flow and air flow) is a widely distributed clean energy source, and the development of efficient collection and conversion technologies for it is of significant practical importance. However, current fluid energy collection devices still have significant limitations in terms of technical principles and structural design, making it difficult to meet the energy utilization needs in complex environments. To address the directional sensitivity issue, existing omnidirectional flow energy collection devices often employ symmetrical structural designs, such as spherical shells or multi-impeller array layouts. For example, patent CN201720345678.9 discloses a spherical water flow power generation device that achieves omnidirectional drive through uniformly distributed guide vanes on a spherical surface. However, this device uses only a single electromagnetic power generation module. When the fluid flow velocity is below 2 m / s, the rotor speed is less than 100 rpm, and the electromagnetic induced electromotive force is less than 1V, which cannot meet the power supply requirements of most electronic devices. Another typical approach is to employ multiple orthogonally arranged piezoelectric cantilever beam structures, such as the cross-shaped cantilever beam array proposed in the paper "Omnidirectional piezoelectric energy harvester for low-frequency vibrations" (2019). Although it can respond to multi-directional fluid excitation, the uneven stress distribution of its piezoelectric material under non-axial loads leads to a 30%-50% difference in power generation efficiency among the cantilever beams, resulting in an overall energy conversion efficiency of only 15%-20%. More critically, existing omnidirectional devices generally lack a composite energy conversion mechanism. A single technical path cannot simultaneously meet the energy harvesting needs under different flow velocities and frequencies: when the fluid is in a low-frequency, low-velocity state, the piezoelectric effect of the piezoelectric material is dominant, but the electromagnetic power generation efficiency is low; while in high-frequency, high-speed scenarios, the electromagnetic induction efficiency is improved, but the piezoelectric material suffers energy loss due to frequency mismatch. This technical limitation results in the average power generation efficiency of existing omnidirectional devices being less than 25% over a wide flow velocity range (0.5-10 m / s), failing to achieve full-spectrum utilization of fluid energy.

[0003] Furthermore, traditional fluid energy harvesting devices mostly rely on single power generation technologies, with piezoelectric power generation and electromagnetic power generation being the two most commonly used approaches. However, both suffer from insurmountable performance bottlenecks. Piezoelectric power generation operates on the principle of the piezoelectric effect, where mechanical stress causes charge separation in piezoelectric materials. Existing piezoelectric devices typically use bulk piezoelectric ceramics or polymer films as transducers, exhibiting high energy conversion efficiency in low-frequency (e.g., <10Hz) fluid vibration environments. For example, in micro-flow scenarios in rivers, the theoretical conversion efficiency of a single piezoelectric device can reach 30%-40%. However, when the fluid velocity increases, causing the vibration frequency to exceed 50Hz, the mechanical hysteresis effect of the piezoelectric material significantly intensifies. The charge relaxation time mismatches with the stress change period, leading to an energy loss rate exceeding 50%. Moreover, high-frequency stress easily induces fatigue fracture in the piezoelectric material, shortening the device's lifespan. Electromagnetic power generation, based on Faraday's law of electromagnetic induction, generates induced current by a conductor cutting magnetic field lines. This technology exhibits specific advantages in high-frequency fluid environments. For example, under wind speeds exceeding 10 m / s, the power density of traditional electromagnetic generators can reach 2-5 W / m². 3 However, the structural complexity of electromagnetic power generation devices limits their application scope: on the one hand, in order to generate sufficient induced electromotive force, complex stator-rotor structures and high-strength permanent magnets are usually required, which results in a large weight and volume of the device. For example, a traditional electromagnetic wind turbine with a diameter of 1m can weigh more than 50kg, making it difficult to adapt to miniaturized energy harvesting scenarios; on the other hand, electromagnetic power generation is highly sensitive to fluid direction. When the fluid incident angle deviates from the device axis by more than 30°, the rotor speed drops by more than 40%, and the power generation efficiency decreases exponentially. This limits its application in natural environments with variable fluid direction (such as turbulence and tides).

[0004] In summary, current fluid energy harvesting technologies suffer from bottlenecks in efficiency due to single technologies and insufficient omnidirectional response capabilities. There is an urgent need for a novel omnidirectional flow energy harvesting device that combines piezoelectric nanotechnology and electromagnetic power generation technology. This innovative device should integrate the advantages of multiple technologies, be adaptable to omnidirectional flow environments, and possess efficient energy management capabilities, thereby promoting the practical application and industrialization of fluid energy harvesting technology. Summary of the Invention

[0005] This invention provides an omnidirectional flow energy generation device that combines piezoelectric nanoparticles and electromagnetic power generation to overcome the aforementioned technical problems.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A piezoelectric nano-electromagnetic power generation composite omnidirectional flow energy generation device, characterized in that it includes an electromagnetic power generation mechanism, a coupling, a transmission shaft, several arc-shaped flow chamber structures with the same structure, and a mounting frame structure for fixing and installing the arc-shaped flow chamber structures.

[0008] The electromagnetic power generation mechanism is connected to the drive shaft via a coupling;

[0009] The mounting frame structure includes a first trapezoidal arm and a second trapezoidal arm spaced apart on the drive shaft. The first trapezoidal arm and the second trapezoidal arm fix the arc-shaped flow chamber structure to the drive shaft to form an omnidirectional flow energy generation structure. The arc-shaped flow chamber structure includes multiple chamber structures formed by an arc-shaped hood, a bottom plate structure, and several anti-flow plates. The chamber structure is a cavity that gradually narrows from one end to the other and is open at both ends. The chamber structure is equipped with a piezoelectric nano-power generation structure that can generate electrical energy through vibration. The piezoelectric nano-power generation structure includes a column structure and a piezoelectric power generation component. The column structure is engaged with the piezoelectric power generation component through an opening slot structure.

[0010] In the omnidirectional flow energy generation structure, the arc-shaped flow chamber structure is driven by the flowing fluid, which in turn drives the drive shaft to rotate. The drive shaft drives the electromagnetic power generation mechanism to rotate and generate electricity through a coupling.

[0011] Furthermore, the column structure is located at the end of the opening with the smaller degree of contraction at both ends of the cavity structure.

[0012] Furthermore, the base plate structure adopts a triangular base plate, and the arc-shaped blade cover is a triangular arc-shaped cover plate; the air intake plate is fixedly connected between the base plate structure and the arc-shaped blade cover to form a cavity structure.

[0013] Furthermore, the plane containing the center line of the first trapezoidal arm is perpendicular to the plane containing the center line of the second trapezoidal arm.

[0014] Furthermore, the first trapezoidal arm includes a first trapezoidal end and a second trapezoidal end symmetrically opened at both ends of the first trapezoidal arm, and a first trapezoidal side end and a second trapezoidal side end that are supported on both sides of the second trapezoidal arm.

[0015] The second trapezoidal arm includes a third trapezoidal end and a fourth trapezoidal end symmetrically opened at both ends of the second trapezoidal arm, and a third trapezoidal side end and a fourth trapezoidal side end supported on both sides of the second trapezoidal arm;

[0016] The first trapezoidal end and the third trapezoidal side end, the second trapezoidal end and the fourth trapezoidal side end, the third trapezoidal end and the first trapezoidal side end, and the fourth trapezoidal end and the second trapezoidal side end are defined as adjacent ends and adjacent side ends, and the plane where the adjacent ends are located coincides with the plane where the adjacent side ends are located.

[0017] The base plate structure of the arc-shaped flow chamber is fixedly connected to the adjacent end and the adjacent side end.

[0018] Furthermore, the chamber structure includes a first opening end and a second opening end, and the degree of contraction of the first opening end is greater than that of the second opening end;

[0019] In any two adjacent chamber structures, the first opening end of one chamber structure is adjacent to the second opening end of the other chamber structure; the second opening end of one chamber structure is adjacent to the first opening end of the other chamber structure.

[0020] Beneficial Effects: This invention provides a piezoelectric nano-electromagnetic power generation device that combines omnidirectional flow energy. An arc-shaped flow chamber structure is fixedly connected to the drive shaft via a first trapezoidal arm and a second trapezoidal arm spaced apart to form an omnidirectional flow energy generation structure. The arc-shaped flow chamber structure is a cavity structure formed by an arc-shaped hood, a base plate structure, and several flow-facing plates. By designing the arc-shaped hood of the arc-shaped flow chamber structure as an irregular arc-shaped cover plate, it is easier to perceive the orientation of complex and changing flow fields, i.e., it is easier to perceive the flow energy in all directions of complex flow fields. This allows the constructed omnidirectional flow energy generation structure to rotate in any direction to achieve omnidirectional flow energy generation. Based on Bernoulli's principle, this invention designs the cavity formed between the arc-shaped hood, the triangular base plate, and the two flow-facing plates as a gradually narrowing cavity, i.e., an arc-shaped flow chamber structure, with one end narrowing and the other widening. Simultaneously, a slot structure fixes the piezoelectric nano-power generation structure near the opening of the gradually narrowing cavity with a smaller degree of contraction, allowing the flow process to better drive the piezoelectric nano-power generation structure to vibrate and generate electricity. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an exploded view of the overall structure of the piezoelectric nano-electromagnetic power generation composite omnidirectional flow energy generation device proposed in this invention.

[0023] Figure 2 This is a schematic diagram of the structure of the first trapezoidal arm and the second trapezoidal arm in this invention;

[0024] Figure 3 This is a schematic diagram of the firing mechanism inside the arc-shaped flow chamber structure in this invention;

[0025] Figure 4This is an overall perspective view of the arc-shaped flow chamber structure in this invention;

[0026] Figure 5 This is a schematic diagram of the overall structure of the piezoelectric nano-electromagnetic power generation composite omnidirectional flow energy generation device proposed in this invention.

[0027] In the figure: 1. Electromagnetic power generation mechanism; 2. Coupling; 3. Drive shaft; 4. Arc-shaped flow chamber structure; 41. Arc-shaped leaf cover; 42. Base plate structure; 43. Flow-inducing plate; 5. First trapezoidal arm; 6. Second trapezoidal arm; 7. Piezoelectric nano-power generation structure; 71. Column structure; 72. Piezoelectric power generation component; 8. Adjacent end; 9. Adjacent side end. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] This embodiment provides a piezoelectric nano-electromagnetic power generation device with omnidirectional flow energy, such as... Figures 1 to 5 As shown, the structure includes an electromagnetic power generation mechanism 1, a coupling 2, a drive shaft 3, several identical arc-shaped flow chamber structures 4, and a mounting frame structure for fixing the arc-shaped flow chamber structures 4. The electromagnetic power generation mechanism 1 is connected to the drive shaft 3 via the coupling 2. The mounting frame structure includes a first trapezoidal arm 5 and a second trapezoidal arm 6 spaced apart on the drive shaft 3, which fix the arc-shaped flow chamber structures 4 to the drive shaft 3 to form an omnidirectional flow energy generation structure. The arc-shaped flow chamber structure 4 includes an arc-shaped hood 41, a base plate structure 42, and several anti-flow plates. 43 forms multiple chamber structures; the chamber structure is a cavity that gradually narrows from one end of the structure to the other end and is open at both ends; the chamber structure is provided with a piezoelectric nano-power generation structure 7 that can generate electrical energy through vibration; the piezoelectric nano-power generation structure 7 includes a column structure 71 and a piezoelectric power generation component 72, and the column structure 71 is engaged with the piezoelectric power generation component 72 through an opening slot structure; the arc-shaped flow chamber structure 4 in the omnidirectional flow energy power generation structure is driven by the flowing fluid, thereby driving the transmission shaft 3 to rotate, and the transmission shaft 3 drives the electromagnetic power generation mechanism 1 to rotate and generate electricity through the coupling 2.

[0030] In this embodiment, the constructed arc-shaped flow chamber structure 4 is fixedly connected to the drive shaft 3 by a first trapezoidal arm 5 and a second trapezoidal arm 6 spaced apart on the drive shaft to form an omnidirectional flow energy generation structure. The arc-shaped flow chamber structure 4 is a chamber structure formed by an arc-shaped hood 41, a bottom plate structure 42, and several anti-flow plates 43. By designing the outer contour of the arc-shaped hood 41 of the arc-shaped flow chamber structure 4 as an irregular arc-shaped hood, it is easier to perceive the orientation of complex and changing flow fields, that is, it is easier to perceive the various directions of complex flow fields. The flow of energy allows the constructed omnidirectional flow energy power generation structure to rotate in any direction, thereby achieving omnidirectional flow energy power generation. In this embodiment, based on Bernoulli's principle, the cavity formed between the arc-shaped hood 41, the triangular base plate 42 and the flow-inducing plate 43 is designed as a gradually narrowing cavity, i.e., an arc-shaped flow chamber structure 4, with one end narrowing and the other end widening. At the same time, the piezoelectric nano-power generation structure 7 is fixed near the opening of the gradually narrowing cavity with a small degree of contraction through a slot structure, so that the flow can better drive the piezoelectric nano-power generation structure to vibrate and generate electricity.

[0031] In a specific embodiment, the column structure 71 is disposed at the end of the chamber structure with a relatively small degree of contraction. The chamber structure includes a first opening end and a second opening end, and the degree of contraction of the first opening end is greater than that of the second opening end. In any two adjacent chamber structures, the first opening end of one chamber structure is adjacent to the second opening end of the other chamber structure; the second opening end of one chamber structure is adjacent to the first opening end of the other chamber structure. In this embodiment, the piezoelectric nano-power generation structure 7 is fixed near the narrowing opening of the converging chamber by the slot structure of the column structure 71. When fluid passes through the narrowing opening, the pressure of the fluid decreases and the flow velocity increases, thereby driving the piezoelectric power generation unit, i.e., the piezoelectric nano-power generation structure 7, to vibrate better. In addition, the column structure 71 is designed as a column based on the principle of fluid mechanics in which fluid flows through a blunt body to generate periodic eddies. The eddies can better drive the vibration of the piezoelectric power generation unit to generate electricity.

[0032] In a specific embodiment, the base plate structure 42 adopts a triangular base plate, and the arc-shaped blade cover 41 is a triangular arc-shaped cover plate; the flow-inducing plate 43 is fixedly connected between the base plate structure 42 and the arc-shaped blade cover 41 to form a chamber structure. In this embodiment, based on Bernoulli's principle, the chamber formed between the arc-shaped blade cover 41, the triangular base plate, and any two adjacent flow-inducing plates 43 is designed as a gradually narrowing chamber with one end constricted and the other end flared. This allows the flow velocity in the vicinity of the piezoelectric power generation unit to be accelerated at low flow rates, thereby enabling the piezoelectric power generation unit to vibrate better and generate electricity more efficiently. The application of the piezoelectric power generation unit after power generation is not an improvement point of this application and will not be elaborated on here.

[0033] In a specific embodiment, the plane containing the center line of the first trapezoidal arm 5 is perpendicular to the plane containing the center line of the second trapezoidal arm 6; the first trapezoidal arm 5 includes a first trapezoidal end and a second trapezoidal end symmetrically opened at both ends of the first trapezoidal arm 5, and a first trapezoidal side end and a second trapezoidal side end supported on both sides of the second trapezoidal arm 6; the second trapezoidal arm includes a third trapezoidal end and a fourth trapezoidal end symmetrically opened at both ends of the second trapezoidal arm, and a third trapezoidal side end and a fourth trapezoidal side end supported on both sides of the second trapezoidal arm; the first trapezoidal end and the third trapezoidal side end, the second trapezoidal end and the fourth trapezoidal side end, the third trapezoidal end and the first trapezoidal side end, and the fourth trapezoidal end and the second trapezoidal side end are defined as adjacent end 8 and adjacent side end 9, and the plane containing the adjacent end 8 coincides with the plane containing the adjacent side end 9; the bottom plate structure 42 of the arc-shaped flow chamber structure 4 is fixedly connected to the adjacent end 8 and the adjacent side end 9. In this embodiment, the first trapezoidal arm 5 and the second trapezoidal arm 6 enable the fixed installation of the arc-shaped flow chamber structure 4 for omnidirectional sensing of the flow process, thus forming an omnidirectional flow energy power generation structure. This omnidirectional flow energy power generation structure makes it easier to sense the flow energy of fluid in all directions of a complex flow field. Therefore, when sensing fluid in any direction, the flow baffle 43 drives the arc-shaped flow chamber structure 4 to rotate around the drive shaft. Since the drive shaft 3 and the electromagnetic power generation structure 1 are connected by a coupling 2, the rotation of the drive shaft 3 also drives the electromagnetic power generation structure 1 to rotate and generate electricity. The specific structure of the electromagnetic power generation structure 1 and the method of generating electricity are existing known technologies and will not be described in detail here.

[0034] The working principle of the device described in this embodiment is as follows: When in use, the device is installed at the preset position where power generation is required. When fluid flows through the arc-shaped flow chamber structure 4 in any direction, it can drive the drive shaft 3 to rotate. Since the drive shaft 3 is connected to the electromagnetic power generation structure 1 by a coupling 2, the rotation of the drive shaft 3 will also drive the electromagnetic power generation structure 1 to rotate and generate electricity. At the same time, the eddy current generated after the fluid flows through the column structure 71 can drive the piezoelectric power generation unit in the arc-shaped flow chamber structure 4 to vibrate and generate electricity better.

[0035] The beneficial effects of the device described in this embodiment are as follows: By using the first trapezoidal arm and the second trapezoidal arm spaced apart on the drive shaft, the constructed arc-shaped flow chamber structure is fixedly connected to the drive shaft to form an omnidirectional flow energy power generation structure. The arc-shaped flow chamber structure is a cavity structure formed by an arc-shaped hood, a base plate structure, and several anti-flow plates. By designing the outer contour of the arc-shaped hood of the arc-shaped flow chamber structure as an irregular arc-shaped hood plate, it is easier to perceive the orientation of complex and variable flow fields, that is, it is easier to perceive the flow energy in all directions of complex flow fields. This allows the constructed omnidirectional flow energy power generation structure to rotate in any direction to achieve omnidirectional flow energy power generation. Based on Bernoulli's principle, this invention designs the cavity formed between the arc-shaped hood, the triangular base plate, and the two anti-flow plates as a gradually narrowing cavity, i.e., an arc-shaped flow chamber structure, with one end narrowing and the other end widening. At the same time, the piezoelectric nano-power generation structure is fixed near the opening with a small degree of narrowing in the gradually narrowing cavity through a slot structure, so that the flow can better drive the piezoelectric nano-power generation structure to vibrate and generate electricity.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A piezoelectric nano-electromagnetic power generation device with omnidirectional energy flow, characterized in that, It includes an electromagnetic power generation mechanism (1), a coupling (2), a drive shaft (3), several arc-shaped flow chamber structures (4) with the same structure, and a mounting frame structure for fixing the arc-shaped flow chamber structure (4); The electromagnetic power generation mechanism (1) is connected to the transmission shaft (3) via a coupling (2); The mounting frame structure includes a first trapezoidal arm (5) and a second trapezoidal arm (6) spaced apart on the drive shaft (3). The arc-shaped flow chamber structure (4) is fixedly connected to the drive shaft (3) through the first trapezoidal arm (5) and the second trapezoidal arm (6) to form an omnidirectional flow energy generation structure. The arc-shaped flow chamber structure (4) includes multiple chamber structures formed by an arc-shaped hood (41), a base plate structure (42) and several anti-flow plates (43). The chamber structure is a cavity that gradually narrows from one end of the structure to the other end and is open at both ends. The chamber structure is provided with a piezoelectric nano-power generation structure (7) that can generate electrical energy through vibration. The piezoelectric nano-power generation structure (7) includes a column structure (71) and a piezoelectric power generation component (72). The column structure (71) is engaged with the piezoelectric power generation component (72) through a slot structure. The arc-shaped flow chamber structure (4) in the omnidirectional flow energy power generation structure is driven by the flowing fluid, which in turn drives the transmission shaft (3) to rotate. The transmission shaft (3) drives the electromagnetic power generation mechanism (1) to rotate and generate electricity through the coupling (2).

2. The piezoelectric nano-electromagnetic power generation device according to claim 1, characterized in that, The column structure (71) is located at the end of the opening with the smaller degree of contraction at both ends of the chamber structure.

3. The piezoelectric nano-electromagnetic power generation device according to claim 2, characterized in that, The base plate structure (42) adopts a triangular base plate, and the arc-shaped blade cover (41) is a triangular arc-shaped cover plate; the frontal plate (43) is fixedly connected between the base plate structure (42) and the arc-shaped blade cover (41) to form a chamber structure.

4. The piezoelectric nano-electromagnetic power generation device according to claim 3, characterized in that, The plane containing the center line of the first trapezoidal arm (5) is perpendicular to the plane containing the center line of the second trapezoidal arm (6).

5. The piezoelectric nano-electromagnetic power generation device according to claim 4, characterized in that, The first trapezoidal arm (5) includes a first trapezoidal end and a second trapezoidal end symmetrically opened at both ends of the first trapezoidal arm (5), and a first trapezoidal side end and a second trapezoidal side end oppositely opened on both sides of the second trapezoidal arm (6); The second trapezoidal arm includes a third trapezoidal end and a fourth trapezoidal end symmetrically opened at both ends of the second trapezoidal arm, and a third trapezoidal side end and a fourth trapezoidal side end supported on both sides of the second trapezoidal arm; Define the first trapezoidal end and the third trapezoidal side end, the second trapezoidal end and the fourth trapezoidal side end, the third trapezoidal end and the first trapezoidal side end, and the fourth trapezoidal end and the second trapezoidal side end as adjacent end (8) and adjacent side end (9), and the plane where the adjacent end (8) is located coincides with the plane where the adjacent side end (9) is located; The bottom plate structure (42) of the arc-shaped flow chamber structure (4) is fixedly connected to the adjacent end (8) and the adjacent side end (9).

6. The piezoelectric nano-electromagnetic power generation device according to claim 5, characterized in that, The chamber structure includes a first opening end and a second opening end, and the degree of contraction of the first opening end is greater than that of the second opening end; In any two adjacent chamber structures, the first opening end of one chamber structure is adjacent to the second opening end of the other chamber structure; the second opening end of one chamber structure is adjacent to the first opening end of the other chamber structure.

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