Flow-induced vibration energy collecting device and friction nanometer power generation, early warning and power supply equipment

Abstract

The embodiment of the utility model provides a flow-induced vibration energy collecting device, friction nanometer power generation equipment adopting the energy collecting device, early warning equipment and power supply equipment, and belongs to the technical field of nanometer power generation. The flow-induced vibration energy collecting device comprises a rotating track, a rotating ring, a wind direction blade, a cantilever beam and a bluff body structure, and the rotating track is an annular track formed by assembling two semicircular rings into a whole; the rotating ring is a hollow ring formed by assembling two semicircular ring sleeves into a whole, and the rotating ring is sleeved outside the rotating track and can rotate along the rotating track in all directions; the wind direction blade and the cantilever beam are oppositely arranged on the semicircular ring sleeve through the connecting device, the bluff body structure is arranged on the side, away from the wind direction blade, of the cantilever beam to form a wind indicator structure, and the wind direction blade of the wind indicator structure drives the rotating ring to rotate in all directions on the rotating track under the action of wind power. Therefore, the bluff body structure faces the wind coming direction so as to collect flow-induced vibration energy generated by wind power.

Description

Technical Field

[0001] The present application relates to the field of nano-power generation technology, and specifically to a flow-induced vibration energy collection device and a friction nano-power generation device, an early warning device, and a power supply device using the energy collection device. Background Art

[0002] Shelterbelts play a very important role in preventing wind and sand, conserving water resources, regulating climate, and beautifying the environment, reducing the adverse effects of strong winds on human activities.

[0003] However, because these locations are often remote and lack sustainable power sources, there is a lack of monitoring systems (such as IoT devices) for shelterbelt areas. Fortunately for these IoT devices, shelterbelts are ideal for harvesting wasted wind energy because these areas are windy and the trees provide excellent support structures for mounting energy harvesting systems.

[0004] Therefore, collecting omnidirectional energy from shelterbelt trees has great value and significance. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide an energy collection device capable of collecting omnidirectional wind flow-induced vibration energy.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides a flow-induced vibration energy collection device, including: a rotating track, a rotating ring, a wind direction blade, a cantilever beam and a bluff structure,

[0007] The rotating track is a circular track in which two semicircular rings are assembled into one;

[0008] The rotating ring is a hollow ring formed by two semicircular rings, and is placed outside the rotating track and can rotate in all directions along the rotating track.

[0009] The wind direction blades and the cantilever beam are arranged on the semicircular ring sleeve facing each other through a connecting device, and the blunt body structure is arranged on the side of the cantilever beam away from the wind direction blades to form a weather vane structure. Under the action of wind force, the wind direction blades of the wind vane structure drive the rotating ring to rotate in all directions on the rotating track, so that the blunt body structure faces the incoming wind direction to collect the flow-induced vibration energy generated by the wind force.

[0010] Preferably, the rotating track, the rotating ring, the wind direction blades and the cantilever beam are made of PLA.

[0011] Preferably, the surface of the bluff body structure is provided with a foam shell.

[0012] Optionally, the cross-section of the bluff body structure is one of circular, trapezoidal, triangular, and rectangular.

[0013] Preferably, the cross section of the bluff body structure is a trapezoid, and the side of the cross section close to the wind direction blade is the upper base of the trapezoid, and the other side of the cross section away from the wind direction blade is the lower base of the trapezoid.

[0014] On the other hand, the embodiment of the present invention provides a friction nano power generation device, including a friction nano power generation unit and a flow-induced vibration energy collection device of the present invention,

[0015] The friction nano power generation unit includes: two nylon-covered PCB circuit boards, a support frame, and a PTFE ball, and the friction nano power generation unit is configured as follows:

[0016] The PCB circuit board is an upper and lower double electrode, each of the upper and lower double electrodes is an electrode arranged on the substrate, and there is a gap between the upper and lower double electrodes;

[0017] The support frame comprises an outer frame and an inner support protrusion located in the middle of the inner edge of the outer frame, and a groove is provided in the outer frame to install the upper and lower double electrodes; and

[0018] The PTFE ball is placed between the upper and lower electrodes and can roll between the upper and lower electrodes to generate friction current.

[0019] Wherein, the bluff body structure is configured as: a friction nano power generation unit with a protective shell.

[0020] Preferably, the gap is 1 mm.

[0021] Preferably, the electrodes are copper electrodes.

[0022] On the other hand, an embodiment of the utility model provides an early warning device, including an alarm and a friction nano power generation device of the utility model, wherein the friction nano power generation device supplies power to the alarm, and the alarm is configured so that the alarm working voltage or the alarm working power is equivalent to the corresponding energy level in the friction nano power generation device.

[0023] Preferably, the energy level is the wind force level that the wind direction blades are subjected to.

[0024] On the other hand, an embodiment of the utility model provides a power supply device, including a power transmission device and the friction nano power generation device of the utility model, wherein the power transmission device is electrically connected to the friction nano power generation device for supplying power to electrical equipment.

[0025] Preferably, the power supply device also includes an electric energy storage component for storing the electric energy generated by the friction nano power generation device and supplying power to the electric device through a power transmission device.

[0026] Through the above technical solution, the utility model realizes an omnidirectional flow-induced vibration energy collection device, in which the wind direction blades and the cantilever beam of the device are arranged opposite to each other on two semicircular ring sleeves forming a rotating track through a connecting device, and the blunt body structure is arranged on the side of the cantilever beam away from the wind direction blades, thereby forming a weather vane structure. Under the action of wind force, the wind direction blade drives the rotating ring to rotate on the rotating track, so that the blunt body structure faces the direction of the incoming wind to collect the flow-induced vibration energy generated by the wind force. Since the wind vane structure of the utility model includes a rotating ring and a rotating track, it can collect omnidirectional flow-induced vibration energy, and the device can be conveniently installed on trees in the shelterbelt, and the collected energy is used for temperature and humidity monitoring, and can also provide feedback for climate regulation, forest fire warning and wireless wind speed warning of the shelterbelt.

[0027] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the embodiments of the present utility model and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present utility model, but do not constitute a limitation on the embodiments of the present utility model. In the accompanying drawings:

[0029] Figure 1 It is a structural schematic diagram of a flow-induced vibration energy collection system including a friction nano-power generation unit and a fluid structure of the utility model;

[0030] Figure 2 yes Figure 1 A comparison diagram of charge density generated by different embodiments and the prior art;

[0031] Figure 3 yes Figure 1 The structural diagram of the friction nano power generation unit in the embodiment;

[0032] Figure 4 yes Figure 1 A schematic diagram of the assembly of the rotating ring and the ring sleeve structure of the fluid structure in the embodiment;

[0033] Figure 5 This is a schematic diagram of the linear relationship between wind speed and output charge of the friction nano power generation unit of the utility model at different wind speeds;

[0034] Figure 6 is a schematic diagram of the operation of the friction nano power generation unit of the utility model for powering the wind warning device; and

[0035] Figure 7 It is a working schematic diagram of the friction nano power generation unit of the utility model being used as a power supply device of a thermometer and hygrometer.

[0036] Description of Reference Numerals

[0037] 1, 32 – Rotating track;

[0038] 2 – wind direction blade;

[0039] 11, 31 – rotating ring;

[0040] 12 – cantilever beam;

[0041] 13 – Power generation unit;

[0042] 21——PCB circuit board;

[0043] 22——Nylon;

[0044] 23 – support frame;

[0045] 24 – PTFE balls; and

[0046] 33——Bearings. DETAILED DESCRIPTION

[0047] The specific implementation of the embodiment of the utility model is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the utility model, and is not used to limit the embodiment of the utility model.

[0048] This embodiment discloses an energy collection system, which includes a friction nano power generation unit and a fluid structure. It should be noted that the fluid structure can be regarded as a flow-induced vibration energy collection device for collecting omnidirectional flow-induced vibration energy, and the friction nano power generation unit converts the flow-induced vibration energy collected by the fluid structure into electrical energy. The energy collection system of this embodiment is installed on the trees of the shelterbelt to collect wind energy in the shelterbelt, and converts the collected energy into electrical energy to provide the necessary electrical energy for the sensing system or the monitoring system for improving the shelterbelt effect, but the utility model is not limited to being used for collecting wind energy in the shelterbelt.

[0049] refer to Figure 1As shown, the system includes: a power generation unit 13 and a fluid structure, wherein the fluid structure includes a rotating track 1, a rotating ring 11, a wind direction blade 2 and a cantilever beam 12, the power generation unit 13 and the protective shell that wraps the power generation unit form a bluff structure, and the wind direction blade 2 and the cantilever beam 12 are arranged on a semicircular ring sleeve that constitutes the rotating ring 11 facing each other through a connecting device, and the bluff structure is arranged on the side of the cantilever beam 12 away from the wind direction blade 2, forming a weather vane structure, and the rotating ring 11 and the rotating track 1 can make the bluff unit always face the incoming wind direction, so that wind energy in all directions can be collected. It should be noted that the bluff structure is arranged at one end of the cantilever beam 12 and as a part of the wind vane structure, the side area of ​​the bluff structure is required to be smaller than the side area of ​​the wind direction blade 2, so that the bluff unit always faces the incoming wind direction, so that wind energy in all directions can be collected.

[0050] In this embodiment, Figure 1 The structure of the rotating track 1 and the rotating ring 11 in the middle of the fluid structure in the energy collection system shown in FIG. Figure 4 As shown, the rotating track 1 is a circular rotating track 32 in which two semicircular rings are assembled as one; the rotating rings 11 and 31 are two semicircular rings connected together, forming a hollow ring sleeved outside the rotating track 32, and can rotate in all directions along the rotating track, wherein the rotating track 31 also supports the rotating track 32. The wind direction blades 2 at the tail of the fluid structure and the cantilever beam 12 at the front are fixed by the bearings 33 arranged on the rotating ring 31, so that the wind direction blades 2 of the wind vane structure drive the rotating ring 11 to rotate in all directions on the rotating track 1 under the action of wind force, so that the bluff structure faces the incoming wind direction to collect the flow-induced vibration energy generated by the wind force.

[0051] In this embodiment, Figure 1 The structure of the power generation unit 13 in the energy collection system shown is as follows Figure 3 As shown, the power generation unit 13 includes two PCB circuit boards 21 with nylon 22 on the upper and lower sides, a support frame 23, and a PTFE ball 24. Two 0.6mm thick bare copper PCB printed circuit boards 21 are used as the upper and lower double electrodes, and two 1 ounce thick, 48*23.5mm copper electrodes are included on a 50*50mm substrate, and the gap between the two copper electrodes is 1mm. The electrode support frame 23 between the upper and lower electrodes is printed with 3D printing resin, which includes an outer frame with a side length of 52*52mm, a thickness of 2mm, and a height of 4mm, and an internal support protrusion of 0.5mm thick and 2mm high located in the middle of the inner edge of the outer frame. A 1mm high and 2mm long groove is designed on one of the sides to facilitate the installation and removal of the upper and lower electrodes. The PTFE ball 24 is placed in the gap between the upper and lower double electrodes so that it can roll in the gap to generate friction current, and then assembled to form a power generation unit. Since the PTFE ball 24 is in a closed gap and in a rolling mode, its loss is small and it is easier to use for a long time.

[0052] Regarding the thickness of the copper electrode, it should be noted that 1 ounce of thickness can be recorded as 1oz, which means that the weight of the copper material per square foot is 1 ounce, which is converted into a standard unit of 35.27 grams per square meter of copper material. The thickness of the copper electrode can be used to calculate the current density. The purpose of using 1 ounce of copper thickness in the PCB circuit board 21 in this embodiment is to ensure the electrical conductivity and heat dissipation performance of the circuit board. Copper is an excellent conductive material. Therefore, increasing the thickness of copper foil on the PCB circuit board can improve the electrical conductivity and stability of the circuit board. At the same time, the copper foil can also be used as a radiator to quickly dissipate the heat on the PCB circuit board to ensure the stability and reliability of the circuit board.

[0053] Regarding the fluid structure in the energy collection system, it should be noted that its main parts, such as the rotating track 1, the rotating ring 11, the wind direction blade 2 and the cantilever beam 12, can be made of PLA or other resin materials through 3D printing, which is economical, practical and environmentally friendly. In this embodiment, the rotating track 32 is assembled into a circular ring by two semicircular rings, with an inner diameter of 10 cm, an outer diameter of 16 cm, and a track width of 1 cm; the rotating ring 31 is two identical ring sleeves connected together by semicircular supports, and the upper and lower surfaces of the ring sleeves each have two bearings 33 with an inner diameter of 3 mm, and the outer surface of the ring sleeves each has a protruding connection device for connecting the cantilever beam 12 and the wind direction blade 2, so that the rotating ring 31 can rotate in all directions on the rotating track 32. The side of the tail wind direction blade 2 is a rectangle of 10*20cm, and the bluff structure is in the shape of a terrace. The cross section of the terrace is a trapezoid. The upper bottom surface of the terrace is a rectangle of 7*10, and the lower bottom surface of the terrace is a rectangle of 10*10. The terrace is 7cm high, and the upper bottom surface is connected to the end position of the cantilever beam, that is, the cross section of the bluff structure is a trapezoid, and the cross section is the upper bottom of the trapezoid on the side close to the wind direction blade 2, and the lower bottom of the trapezoid on the other side away from the wind direction blade 2. When in a windy environment, the wind direction blade 2 at the tail will drive the overall structure to rotate until the bluff structure points to the direction of the incoming wind, so as to realize omnidirectional collection of wind energy. Under the action of the wind, the bluff structure swings left and right in the horizontal direction, thereby driving the ball inside to roll between the two electrodes to generate electricity. The combination of the structure of the fluid and the power generation unit greatly reduces its initial wind speed, and utilizes the principle of flow-induced vibration to realize energy collection in a wide range of low and high wind speeds.

[0054] Regarding the bluff structure, it should be noted that the bluff structure in the present embodiment includes an internal power generation unit 13 and an external terraced pearl cotton foam, and may also be a plurality of power generation units 13 placed in parallel in the terraced pearl foam. While protecting the internal power generation unit 13, the pearl foam enables the entire device to collect energy at a lower wind speed. The left and right swinging of the bluff structure causes the PTFE ball to circulate and roll in the two electrodes affixed with nylon membranes, generating electrical energy that flows to the external circuit through wires for storage. However, the present invention is not limited to this, and the cross-section of the bluff structure is one of a circle, a trapezoid, a triangle, and a rectangle, that is, the bluff structure may be spherical, conical, or rectangular, as long as the side area of ​​the bluff structure is smaller than the side area of ​​the wind direction blade 2 to form a weather vane structure. Reference Figure 2 As shown, the prior art ( Figure 2 25a) and the comparison of the unit charge density obtained when the shape of the cross section of the bluff body structure in this embodiment is changed, as shown in FIG. Figure 2 As shown in the rightmost column in the figure, the unit charge density obtained when the cross section of this embodiment is a trapezoid is the highest among similar works so far.

[0055] Compared with the prior art, the technical advantages of this embodiment are:

[0056] 1. The clever use of rotating rings and rotating tracks can make the bluff body unit always face the incoming wind direction, so as to collect the flow-induced vibration energy generated by wind in all directions;

[0057] 2. The design of the fluid structure enables it to achieve a wide range of wind energy collection at low wind speeds (vortex street vibration) and high wind speeds (galloping vibration), making it easier to realize its application value;

[0058] 3. The power generation unit adopts a rolling friction nanogenerator, which has little wear and tear, excellent durability, and can be used for a long time;

[0059] 4. The foam shell outside the power generation unit can not only protect the power generation unit, but also change its shape to produce a larger swing so that it has a higher output. In particular, when the foam shell is in a terrace shape, a very high charge density can be obtained to improve the output capacity;

[0060] 5. The main part of the fluid structure is made of PLA material in batches through 3D printing. It can be adjusted to different sizes according to the size of the trees to be placed. It does not require additional support and can be directly installed in the shelterbelt. It is economical, practical and environmentally friendly.

[0061] The present application also discloses an omnidirectional flow-induced vibration friction nanogenerator based on a shelterbelt for use in wind warning. The warning device includes a friction nanogenerator unit of the present application, which converts the collected flow-induced vibration energy into electrical energy and provides it to an alarm. The linear relationship between the wind speed and the output charge of the friction nanogenerator unit at different wind speeds in this embodiment can be referred to Figure 5 The different output charges corresponding to different wind speeds shown in the figure show that the wind speed and the output charge are in a linear relationship, and the fitting relationship is good. Therefore, the invention can be used in shelterbelts to give an alarm for strong winds to prevent human activities from being affected. Figure 6 The wind warning device of the present application uses the friction nano-power generation unit to power the alarm and make it alarm. The alarm is configured so that the alarm working voltage or the alarm working power is equivalent to the corresponding energy level in the friction nano-power generation device.

[0062] In some embodiments, the energy level is set according to the wind force level experienced by the wind direction blades.

[0063] The present application also provides an omnidirectional flow-induced vibration friction nanogenerator based on a shelterbelt for use in a humidity warning device. Figure 7 , showing the working principle of the friction nano power generation unit to power the thermometer and hygrometer. It should be noted that the present application is not limited to this. In addition to wind speed, temperature and humidity warning, it can also be used to power different types of sensors such as gas concentration, to measure important indicators such as temperature, humidity, concentration of harmful gases, and concentration of greenhouse gases in the environment, so as to feedback the effect of shelterbelts on improving the climate without the need for additional manpower and material monitoring.

[0064] The embodiment of the utility model also provides a power supply device, including a power transmission device and the friction nano power generation device of the utility model, wherein the power transmission device is electrically connected to the friction nano power generation device to supply power to the electrical equipment.

[0065] In some embodiments, the power supply device further includes an electric energy storage component for storing the electric energy generated by the friction nano power generation device and supplying power to the electric device through the power transmission device.

[0066] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0067] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A flow-induced vibration energy collection device, characterized in that: include: Rotating tracks, rotating rings, wind vanes, cantilever beams and bluff structures, Wherein, the rotating track is a circular track in which two semicircular rings are assembled into one; The rotating ring is a hollow ring formed by two semicircular rings, which are mounted outside the rotating track and can rotate in all directions along the rotating track. The wind direction blades and the cantilever beam are arranged on the semicircular ring sleeve facing each other through a connecting device, and the blunt body structure is arranged on a side of the cantilever beam away from the wind direction blades to form a weather vane structure. Under the action of wind force, the wind direction blades of the wind vane structure drive the rotating ring to rotate in all directions on the rotating track, so that the blunt body structure faces the incoming wind direction to collect the flow-induced vibration energy generated by the wind force.

2. The flow-induced vibration energy harvesting device according to claim 1, characterized in that: The rotating track, the rotating ring, the wind direction blade and the cantilever beam are made of PLA material.

3. The flow-induced vibration energy harvesting device according to claim 1, characterized in that: A foam shell is provided on the surface of the bluff structure.

4. The flow-induced vibration energy harvesting device according to claim 3, characterized in that: The cross section of the bluff body structure is one of a circle, a trapezoid, a triangle and a rectangle.

5. The flow-induced vibration energy harvesting device according to claim 3, characterized in that: The cross section of the bluff structure is a trapezoid, and the side of the cross section close to the wind direction blade is the upper base of the trapezoid, and the other side of the cross section away from the wind direction blade is the lower base of the trapezoid.

6. A friction nano power generation device, characterized in that: It comprises a friction nano power generation unit and a flow-induced vibration energy collection device as claimed in claim 1, The friction nano power generation unit includes: two upper and lower nylon-covered PCB circuit boards, a support frame, and a PTFE ball, and the friction nano power generation unit is configured as follows: The PCB circuit board is a pair of upper and lower electrodes, each of which is an electrode arranged on a substrate, and there is a gap between the upper and lower electrodes; The support frame comprises an outer frame and an internal support protrusion located in the middle of the inner edge of the outer frame, and a groove is provided in the outer frame to install the upper and lower double electrodes; and The PTFE ball is disposed between the upper and lower double electrodes and can roll between the upper and lower double electrodes to generate friction current. Wherein, the bluff body structure is configured as: the friction nano power generation unit having a protective shell.

7. The friction nano power generation device according to claim 6, characterized in that: The gap is 1 mm.

8. The friction nano power generation device according to claim 6, characterized in that: The electrode is a copper electrode.

9. An early warning device, comprising an alarm, and a friction nano-power generation device as described in any one of claims 6 to 8, wherein the friction nano-power generation device supplies power to the alarm, and the alarm is configured so that the alarm working voltage or the alarm working power is equivalent to the corresponding energy level in the friction nano-power generation device.

10. The early warning device according to claim 9, characterized in that: The energy level is the wind force level that the wind direction blade is subjected to.

11. A power supply device, comprising a power transmission device and a friction nano power generation device as claimed in any one of claims 6 to 8, wherein: The power transmission device is electrically connected to the friction nano power generation device and is used to supply power to electrical equipment.

12. The power supply device according to claim 11, characterized in that: It also includes an electric energy storage component for storing the electric energy generated by the friction nano power generation device and supplying power to the electric device through the power transmission device.

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