Wide-area piezoelectric energy coupling and collecting device based on full-coverage arrangement of blades

Abstract

The utility model discloses a wide-area piezoelectric energy coupling and collecting device based on blade full-coverage type arrangement, which comprises an energy concentration system and a piezoelectric transduction system, and is characterized in that the energy concentration system comprises a front energy concentration pipe part, a necking part and a rear flow velocity raising pipe part which are connected in sequence; the piezoelectric transduction system comprises piezoelectric blades which are fixedly installed in the front energy concentration pipe part and covered with PVDF films, and the piezoelectric blades are connected with an external energy transmission system. The fluid energy collecting device only comprises two main parts, namely an energy concentrating system and a piezoelectric transduction system, has the characteristics of miniaturization, light weight and simple structure, is high in universality, can be widely applied to multi-scene fluid energy collection, and has the outstanding advantages of high energy collecting power density and high complex flow field adaptability; and deep utilization of multi-energy coupled fluid energy is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of fluid piezoelectric energy conversion technology, and in particular relates to a wide-area piezoelectric energy coupling and collection device based on a blade-fully-covered arrangement. Background Technology

[0002] In the current era of continuous exploration and innovation in the energy field, fluid piezoelectric conversion technology, as an emerging energy conversion method, can efficiently convert fluid energy into electrical energy. This technology exhibits unique power generation advantages in special environments such as tunnels and oceans; and it has extremely broad application prospects in enabling self-powered wireless sensing nodes. Among various fluid energy harvesting technologies, traditional rotary electromagnetic energy harvesters face many challenges: complex mechanical structure design, cumbersome and difficult installation processes, and difficulty in miniaturization, severely limiting their large-scale application. In contrast, piezoelectric conversion technology, with its high energy density, simple structure, ease of maintenance, and miniaturization, has greater universality and promotional value. However, existing fluid piezoelectric conversion devices still have significant drawbacks: the device structure is relatively large, application scenarios are clearly limited, and stringent wind speed requirements make stable operation difficult in complex flow field environments; resulting in low power density and poor flow velocity adaptability, failing to provide a stable and reliable power supply for various detection and sensing instruments, urgently requiring technological innovation to overcome these bottlenecks. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a wide-area piezoelectric energy coupling and harvesting device based on a blade-fully-covered arrangement.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0005] A wide-area piezoelectric energy coupling and harvesting device based on a blade-fully-covered arrangement includes an energy concentration system and a piezoelectric transducer system. The energy concentration system includes a front energy concentration tube, a necking section, and a rear velocity boosting tube connected in sequence. The piezoelectric transducer system includes piezoelectric blades with PVDF film covering all blades fixedly installed in the front energy concentration tube. The piezoelectric blades are connected to an external energy transfer system.

[0006] To optimize the above technical solution, the specific measures also include:

[0007] The aforementioned front energy concentration tube has a radius ratio of 3 at both ends and a fitted function graph y = 0.5x. 2 The rotating generated arc-shaped parabolic surface is connected to the front end of the constricted neck at the small radius end of the front energy concentration tube.

[0008] The aforementioned backflow booster pipe has a radius ratio of 3 at both ends, and the fitted function graph is y = 0.5x. 2The rotating generated arc-shaped parabolic surface has a small-radius end of the rear velocity booster tube connected to the necked-off end, and the size of the rear velocity booster tube is smaller than that of the front energy concentration tube.

[0009] The aforementioned piezoelectric transducer system includes a support cylinder and a support rod. One end of the support rod is fixed in the neck, and the other end is fixedly connected to the support cylinder. The support cylinder is located in the front energy concentration tube section.

[0010] The aforementioned supporting cylinder is coaxially arranged with the front energy concentration tube. Multiple straight grooves with equal arcs are arranged on the side of the supporting cylinder. There are multiple piezoelectric blades, with one end of each piezoelectric blade fixedly embedded in a straight groove. The piezoelectric blades are arranged in a cantilevered manner around the supporting cylinder.

[0011] The piezoelectric blades mentioned above are arranged at an angle of 30° to the axis of the supporting cylinder.

[0012] The aforementioned support rod has a hollow support ring at one end, which is interference-fitted with and glued to the neck. The other end of the support rod is fastened to the support cylinder by internal and external spirals. The hollow support ring has a hollowed-out section at the bottom for fluid to pass through the neck.

[0013] The bottom of the aforementioned hollow support ring is provided with reinforcing ribs between it and the support rod.

[0014] The aforementioned energy transfer system includes a bridge rectifier circuit, a voltage regulator capacitor, and an energy storage circuit connected in sequence. The piezoelectric blades are connected to the bridge rectifier circuit.

[0015] The rectifier diodes in the bridge rectifier circuit described above are 1N5819 Schottky diodes, and the voltage regulator capacitor is a 100uF electrolytic capacitor with a withstand voltage of 50V.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model consists of only two main parts: an energy concentration system and a piezoelectric energy conversion system. It features miniaturization, lightweight design, and simple structure, making it highly versatile and applicable to a wide range of fluid energy harvesting scenarios.

[0018] 2. This utility model has the outstanding advantages of high energy harvesting power density and strong adaptability to complex flow fields, which is conducive to the in-depth utilization of fluid energy with multiple energy coupling. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal structure of a wide-area piezoelectric energy coupling harvesting device based on a blade-fully-covered arrangement;

[0020] Figure 2 This is a schematic diagram of the external structure of a wide-area piezoelectric energy coupling and harvesting device based on a blade-fully-covered arrangement;

[0021] Figure 3 This is a schematic diagram of the piezoelectric energy conversion system;

[0022] Figure 4 This is a schematic diagram of the piezoelectric blade.

[0023] Figure 5 A schematic diagram of the structure supporting the cylinder;

[0024] Figure 6 This is a structural schematic diagram of the supporting rod.

[0025] Explanation of reference numerals in the attached drawings: Energy concentration system 1, front energy concentration tube 11, necking 12, rear velocity boosting tube 13, piezoelectric transducer system 2, piezoelectric blade 21, supporting cylinder 22, supporting rod 23. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0027] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0028] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0029] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or units (elements) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms “multiple” / “several” used in this application refer to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can indicate: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0030] Figure 1-2 The diagram shows a schematic of a wide-area piezoelectric energy coupling and harvesting device based on a fully covered blade arrangement. The device mainly consists of an energy concentration system 1 and a piezoelectric transducer system 2. The energy concentration system 1 includes a constricted tube structure composed of a front energy concentration tube section 11, a necked section 12, and a rear velocity boosting tube section 13. The piezoelectric transducer system 2 includes piezoelectric blades 21, a supporting cylinder 22, and supporting rods 23. The piezoelectric blades 21 are fully covered by a PVDF membrane structure.

[0031] The energy concentration system 1 is assembled and fixed in the specific working condition by a fixture. The support rod 23 is interference-fitted with the neck 12 of the energy concentration system 1 and glued and fixed. The support cylinder 22 is fastened to the support rod 23 by internal and external screws. The piezoelectric blade 21 is embedded in the support cylinder 22 and arranged in a cantilever manner.

[0032] The energy concentration system 1 is a gradually narrowing flow channel structure based on sound pressure amplification formed by parabolic combination and rotation. The smaller parabolic part of the structure, namely the rear velocity boosting tube 13, is used for fluid acceleration, while the larger opening part, namely the front energy concentration tube 11, is used for sound energy focusing and amplification. This helps to efficiently collect energy through coupling.

[0033] Figure 3The diagram shows a piezoelectric transducer system. The piezoelectric blades 21 and the supporting cylinder 22 are arranged in the energy concentration system 1 and are connected to the neck 12 through the bottom of the supporting rod 23, thereby determining their relative positions.

[0034] Figure 4 The diagram shows a piezoelectric blade 21. It consists of 20 PVDF film cantilevered and embedded in a supporting cylinder 22.

[0035] Figure 5 The diagram shows a schematic of the supporting cylinder 22. Straight grooves are evenly distributed on the side of the supporting cylinder 22, which are used to fix the piezoelectric blades 21, forming a cantilevered piezoelectric plate arrangement structure. Threads are distributed on the inner side of the supporting cylinder 22 to connect with the supporting rods. Their positional relationships are as follows... Figure 3 As shown.

[0036] Figure 6 The diagram shows a support member 23. It is a support structure with reinforcing ribs and a hollowed-out support ring at the bottom.

[0037] The energy transfer system is existing technology and is not within the protection scope of this utility model. The energy transfer system includes a bridge rectifier circuit, a voltage regulator capacitor and an energy storage circuit connected in sequence. The piezoelectric blades are connected to the bridge rectifier circuit.

[0038] The rectifier diodes used in the bridge rectifier circuit are 1N5819 Schottky diodes, and the voltage regulator capacitor is a 100uF electrolytic capacitor with a withstand voltage of 50V.

[0039] The working principle of this utility model is as follows:

[0040] This device is deployed on tunnel walls, marine islands, and vehicle grilles, among other locations, to generate electricity by coupling and collecting energy from the fluid impact kinetic energy and noise energy in their respective environments. In the tunnel wall deployment scenario, when a train travels at high speed within the tunnel, it generates piston-like airflow and amplifies noise and sound pressure. The fluid entering the energy concentration tube 11 accelerates, and the sound pressure collection parabolic surface gathers the sound energy. The fluid kinetic energy and sound energy couple onto the piezoelectric blades 21, causing them to vibrate at high frequencies. This generates electricity through the piezoelectric effect of the PVDF membrane. This process achieves the conversion from fluid kinetic energy and sound energy to mechanical energy and then to electrical energy.

[0041] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solution described in the implementation of the calculation method of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the needs of the calculation method are met, they are all within the protection scope of this utility model.

Claims

1. A wide-range piezoelectric energy coupling and collecting device based on full-coverage arrangement of leaves, characterized in that: The system includes an energy concentration system (1) and a piezoelectric transducer system (2). The energy concentration system (1) includes a front energy concentration tube section (11), a necking section (12), and a rear velocity boosting section (13) connected in sequence. The piezoelectric transducer system (2) includes a piezoelectric blade (21) with its entire blade covered by a PVDF film, which is fixedly installed in the front energy concentration tube section (11). The piezoelectric blade (21) is connected to an external energy transfer system.

2. A wide area piezoelectric energy coupling and harvesting device based on full-leaf-coverage arrangement according to claim 1, characterized in that: The front energy concentration tube part (11) has a ratio of 3 of the radius at both ends, and a fitting function graph line y=0.5x 2 The arc-shaped parabolic surface is generated by rotation, and the front energy concentration tube part (11) is connected with the front end of the neck part (12) at the small radius end.

3. A wide area piezoelectric energy coupling and harvesting device based on full-leaf-coverage arrangement according to claim 1, characterized in that: The rear flow velocity riser (13) has a ratio of 3 of the radius of the two ends, and a fitting function graph y=0.5x 2 The rear flow velocity riser (13) has a ratio of 3 of the radius of the two ends, and a fitting function graph y=0.5x 4. A wide area piezoelectric energy coupling and harvesting device based on full-coverage arrangement of leaves according to claim 1, characterized in that: The piezoelectric energy conversion system (2) includes a support cylinder (22) and a support rod (23). One end of the support rod (23) is fixed in the neck (12), and the other end is fixedly connected to the support cylinder (22). The support cylinder (22) is located in the front energy concentration tube (11).

5. A wide area piezoelectric energy coupling and harvesting device based on full-leaf coverage arrangement according to claim 4, characterized in that: The supporting cylinder (22) is coaxially arranged with the front energy concentration tube (11). The side of the supporting cylinder (22) is provided with multiple straight grooves of equal arc. There are multiple piezoelectric blades (21). One end of the piezoelectric blade (21) is fixedly embedded in the straight groove. The piezoelectric blade (21) is arranged in a cantilever manner around the supporting cylinder (22).

6. A wide area piezoelectric energy coupling and harvesting device based on full-leaf-coverage arrangement according to claim 5, characterized in that: The piezoelectric blade (21) is arranged at an angle of 30° to the axis of the supporting cylinder (22).

7. A wide area piezoelectric energy coupling and harvesting device based on full-coverage arrangement of leaves according to claim 6, characterized in that: The support rod (23) has a hollow support ring bottom at one end, and the hollow support ring bottom is interference fit with the neck (12) and glued and fixed. The other end of the support rod (23) is fastened to the support cylinder (22) by internal and external spirals. The hollow support ring bottom is provided with a hollow for fluid to pass through the neck (12).

8. A wide area piezoelectric energy coupling and harvesting device based on full-leaf coverage arrangement according to claim 7, characterized in that: A reinforcing rib is provided between the bottom of the hollow support ring and the support rod (23).

9. A wide area piezoelectric energy coupling and harvesting device based on full-leaf-coverage arrangement according to claim 1, characterized in that: The energy transfer system includes a bridge rectifier circuit, a voltage regulator capacitor, and an energy storage circuit connected in sequence. The piezoelectric blade (21) is connected to the bridge rectifier circuit.

10. A wide area piezoelectric energy coupling and harvesting device based on full-leaf coverage arrangement according to claim 9, characterized in that: The rectifier diodes in the bridge rectifier circuit are 1N5819 Schottky diodes, and the voltage regulator capacitor is a 100uF electrolytic capacitor with a withstand voltage of 50V.

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