技术领域technical field
本发明涉及一种发电装置，特别是涉及一种内置压电梁的圆筒涡致振动发电装置。The present invention relates to a power generation device, in particular to a cylindrical vortex-induced vibration power generation device with built-in piezoelectric beams.
背景技术Background technique
水下无线传感器网络作为陆上无线传感器网络的水下延伸，可用于数据采集、污染监测、灾难预防、海洋资源勘测、水下辅助导航定位、远程水下控制、反潜中心战等方面，对国民经济和国防具有重要作用。由于水下传感器网络多布置于海底，其维护和更换代价较大，因此水下无线传感器网络需要一种稳定、可靠、轻便且长效的能源供给。而目前利用波浪和潮汐发电的海洋发电技术或者无法在海底实现或者设备庞大不适用于水下无线传感器网络，因此供电问题成为了水下无线传感器网络技术瓶颈之一。As an underwater extension of land-based wireless sensor networks, underwater wireless sensor networks can be used in data collection, pollution monitoring, disaster prevention, marine resource survey, underwater auxiliary navigation and positioning, remote underwater control, anti-submarine central warfare, etc. The economy and national defense play an important role. Since underwater sensor networks are mostly deployed on the seabed, their maintenance and replacement costs are high, so underwater wireless sensor networks need a stable, reliable, portable and long-term energy supply. However, the current marine power generation technology using wave and tidal power generation cannot be realized on the seabed or the equipment is too large to be suitable for underwater wireless sensor networks. Therefore, the power supply problem has become one of the technical bottlenecks of underwater wireless sensor networks.
涡致振动是自然界中最普遍的一种物理现象，广泛存在于流体运动中，尤其是在流速相对较小的海底环境中也会发生，而且这种振动无需人为增加激励而持久存在，是流体可收集能源之一。压电式振动能量收集技术是利用压电材料或器件将环境振动能量转换为电能的技术，由于其结构简单，能量密度和机电转换效率高，无电磁干扰，易于制作成型，无污染，易于实现微型化，寿命长等特点，被广泛研究和应用。如果利用压电材料将涡致振动能量转换为电能，则可以为水下无线传感器网络的供电问题提供一种解决方案。Vortex-induced vibration is the most common physical phenomenon in nature. It exists widely in fluid motion, especially in the seabed environment with relatively small flow velocity. Moreover, this vibration persists without artificially increasing the excitation. It is a fluid One of the harvestable energy sources. Piezoelectric vibration energy harvesting technology is a technology that uses piezoelectric materials or devices to convert environmental vibration energy into electrical energy. Due to its simple structure, high energy density and electromechanical conversion efficiency, no electromagnetic interference, easy to manufacture, no pollution, and easy to implement Miniaturization, long life and other characteristics have been widely researched and applied. If piezoelectric materials are used to convert vortex-induced vibration energy into electrical energy, it can provide a solution to the power supply problem of underwater wireless sensor networks.
发明内容Contents of the invention
本发明的目的在于提供一种内置压电梁的圆筒涡致振动发电装置，将压电悬臂梁沿轴向置于柔性薄壁圆筒内部的能量收集结构。该结构利用流体绕流圆筒时形成漩涡脱落导致的柔性圆筒周期性弯曲振动，从而带动压电悬臂梁振动产生电能。The object of the present invention is to provide a cylindrical vortex-induced vibration power generation device with a built-in piezoelectric beam, and an energy collection structure in which the piezoelectric cantilever beam is axially placed inside a flexible thin-walled cylinder. The structure utilizes the periodic bending vibration of the flexible cylinder caused by the vortex shedding formed when the fluid flows around the cylinder, thereby driving the vibration of the piezoelectric cantilever beam to generate electric energy.
本发明的目的是通过以下技术方案实现的：The purpose of the present invention is achieved through the following technical solutions:
一种内置压电梁的圆筒涡致振动发电装置，该装置利用流体绕流圆筒时产生的漩涡脱落驱动圆筒在垂直于来流方向进行振动，带动压电片产生弯张振动，从而将动能转换为电能；所述装置包括薄壁圆筒、矩形金属薄片、压电晶片、电极引线槽、支撑杆和底座；两片压电晶片分别粘接在金属基片两侧，压电片电极串联，构成双晶片压电梁，压电梁与支撑杆连接穿过薄壁圆筒底面置于圆筒内部，压电梁平面与圆筒轴向和流体来流方向平行，电极引线通过支撑杆凹槽从底座引出，从而接入能量收集电路；底座固定于海洋、江河底部或水流、气流管道的管壁上。A cylindrical vortex-induced vibration power generation device with a built-in piezoelectric beam, which uses the vortex shedding generated when the fluid flows around the cylinder to drive the cylinder to vibrate perpendicular to the direction of the incoming flow, and drives the piezoelectric sheet to generate flexural vibration, thereby Convert kinetic energy into electrical energy; the device includes a thin-walled cylinder, a rectangular metal sheet, a piezoelectric wafer, an electrode lead groove, a support rod and a base; two piezoelectric wafers are respectively bonded on both sides of the metal substrate, and the electrodes of the piezoelectric wafer are connected in series , forming a bimorph piezoelectric beam. The piezoelectric beam is connected with the support rod through the bottom surface of the thin-walled cylinder and placed inside the cylinder. The plane of the piezoelectric beam is parallel to the axial direction of the cylinder and the direction of fluid flow. The electrode leads pass through the groove of the support rod from the The base is drawn out to access the energy harvesting circuit; the base is fixed on the bottom of the ocean, river or on the pipe wall of the water flow or airflow pipeline.
所述的一种内置压电梁的圆筒涡致振动发电装置，所述圆筒为薄壁圆筒，圆筒长度是其直径的三倍以上，金属基片长度等于圆筒长度，金属基片宽度与圆筒内部直径近似相等。The cylindrical vortex-induced vibration power generation device with built-in piezoelectric beams, the cylinder is a thin-walled cylinder, the length of the cylinder is more than three times its diameter, the length of the metal substrate is equal to the length of the cylinder, and the width of the metal substrate is approximately equal to the inside diameter of the cylinder.
所述的一种内置压电梁的圆筒涡致振动发电装置，所述圆筒直径和长度根据来流速度进行调节。The above-mentioned cylinder vortex-induced vibration power generation device with built-in piezoelectric beams, the diameter and length of the cylinder are adjusted according to the incoming flow velocity.
本发明的优点与效果是：Advantage and effect of the present invention are:
内置压电梁圆筒涡致振动能量转换装置，包括轻质圆筒、压电陶瓷片、金属基板、支撑杆及底座。其中压电陶瓷片利用导电胶粘贴在金属基板两侧，放置于轻质圆筒内部，金属基板顶端固定于圆筒上端盖，金属基板底端与支撑杆连接并与轻质圆筒下端盖位置固定，支撑杆下端固定于底座上，压电片电极引线由支撑杆内凹槽引出至底座内的信号处理电路。该装置放置于海底或江河底部，圆筒轴向与流体流动方向垂直，压电片和金属基板平面与流体流动方向平行。当流体流速与装置中圆筒结构参数满足一定条件时，圆筒柱面两侧会产生交替的漩涡脱落，从而使圆筒在垂直于来流方向产生涡致振动，进而驱动压电片振动产生电能。该能量转换装置中压电梁被封装到圆筒内部，不直接与外部流体接触。这种设计结构增加了圆筒顺流方向抗弯能力，使其横向涡致振动能量加强，不仅解决了其他结构制作困难、密封防腐等问题，还能增强压电梁与圆管的共振耦合，从而提高能量转换效率。Built-in piezoelectric beam cylinder vortex-induced vibration energy conversion device, including light cylinder, piezoelectric ceramic sheet, metal substrate, support rod and base. Among them, the piezoelectric ceramic sheet is pasted on both sides of the metal substrate with conductive adhesive and placed inside the light cylinder. The top of the metal substrate is fixed on the upper end cover of the cylinder, and the bottom end of the metal substrate is connected with the support rod and the lower end cover of the light cylinder. The position is fixed, the lower end of the support rod is fixed on the base, and the electrode leads of the piezoelectric sheet are led out to the signal processing circuit in the base from the inner groove of the support rod. The device is placed on the seabed or the bottom of a river, the axis of the cylinder is perpendicular to the direction of fluid flow, and the plane of the piezoelectric sheet and the metal substrate is parallel to the direction of fluid flow. When the fluid flow rate and the structural parameters of the cylinder in the device meet certain conditions, alternating vortex shedding will occur on both sides of the cylindrical surface of the cylinder, so that the cylinder will generate vortex-induced vibration perpendicular to the direction of the incoming flow, and then drive the piezoelectric plate to vibrate to generate electrical energy. In the energy conversion device, the piezoelectric beams are packaged inside the cylinder and do not directly contact the external fluid. This design structure increases the bending resistance of the cylinder in the direction of flow, and strengthens its transverse vortex-induced vibration energy. It not only solves the difficulties in making other structures, sealing and anti-corrosion problems, but also enhances the resonance coupling between the piezoelectric beam and the circular tube. Thereby improving energy conversion efficiency.
附图说明Description of drawings
图1为内置压电梁圆筒涡致振动能量转换装置结构示意图；Fig. 1 is a structural schematic diagram of a vortex-induced vibration energy conversion device with a built-in piezoelectric beam cylinder;
图2为内置压电梁圆筒涡致振动能量转换装置主视图；Fig. 2 is the front view of the vortex-induced vibration energy conversion device of the built-in piezoelectric beam cylinder;
图3为内置压电梁圆筒涡致振动能量转换装置俯视图；Fig. 3 is a top view of a vortex-induced vibration energy conversion device with a built-in piezoelectric beam cylinder;
图4为内置压电梁圆筒涡致振动能量转换装置总装图；Figure 4 is the general assembly diagram of the vortex-induced vibration energy conversion device for the built-in piezoelectric beam cylinder;
图5为内置压电梁圆筒涡致振动能量转换装置剖面图；Fig. 5 is a cross-sectional view of a vortex-induced vibration energy conversion device with a built-in piezoelectric beam cylinder;
图6为圆筒涡致振动原理图。Figure 6 is a schematic diagram of the vortex-induced vibration of the cylinder.
附图中：1. 圆筒 2. 金属基板 3. 压电晶片 4. 引线槽 5.支撑杆 6. 底座。In the attached drawings: 1. Cylinder 2. Metal substrate 3. Piezoelectric chip 4. Lead groove 5. Support rod 6. Base.
具体实施方式Detailed ways
下面结合附图所示实施例对本发明进行详细说明。The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings.
内置压电梁圆筒涡致振动能量转换装置包括薄壁圆筒1、矩形金属薄片2、压电晶片3、电极引线槽4、支撑杆5和底座6；利用导电胶将两片压电晶片3分别粘接在金属基片2两侧，焊接电源引线使压电片电极串联构成双晶片压电梁，沿轴向将压电梁放置于圆筒内，与圆筒两端粘接固定，从支撑圆筒的支架的引线槽中引出电极线并密封圆筒两端，压电梁平面与圆筒轴向和流体来流方向平行，电极引线通过支撑杆凹槽4从底座6引出，从而接入能量收集电路，底座可固定于海洋、江河底部或水流、气流管道的管壁上。The built-in piezoelectric beam cylinder vortex-induced vibration energy conversion device includes a thin-walled cylinder 1, a rectangular metal sheet 2, a piezoelectric wafer 3, an electrode lead groove 4, a support rod 5, and a base 6; Adhesive on both sides of the metal substrate 2, weld the power leads to make the piezoelectric sheet electrodes connected in series to form a bimorph piezoelectric beam, place the piezoelectric beam in the cylinder along the axial direction, and fix it with the two ends of the cylinder, from the support The electrode wires are led out from the lead groove of the cylinder bracket and sealed at both ends of the cylinder. The plane of the piezoelectric beam is parallel to the axial direction of the cylinder and the direction of fluid flow. For the energy harvesting circuit, the base can be fixed on the bottom of the ocean or river or on the pipe wall of the water flow or airflow pipeline.
当水流或气流绕流圆筒，在圆筒两侧形成有规律的漩涡脱落时，圆筒受漩涡压力在垂直于来流方向产生涡致振动，从而驱动压电梁振动，进而利用压电晶片将动能转换为电能。当脱涡频率与圆筒固有频率接近时可达到较高的能量转换效率。When the water flow or air flow around the cylinder, regular vortex shedding is formed on both sides of the cylinder, the cylinder is subjected to vortex pressure to generate vortex-induced vibration in the direction perpendicular to the incoming flow, thereby driving the piezoelectric beam to vibrate, and then using the piezoelectric wafer Convert kinetic energy to electrical energy. When the shedding frequency is close to the natural frequency of the cylinder, a higher energy conversion efficiency can be achieved.
最后说明的是，以上实施例仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的宗旨和范围，其均应涵盖在本发明的权利要求范围当中。Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510213312.5ACN104868785B (en) | 2015-04-30 | 2015-04-30 | A cylindrical vortex-induced vibration power generation device with built-in piezoelectric beams |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510213312.5ACN104868785B (en) | 2015-04-30 | 2015-04-30 | A cylindrical vortex-induced vibration power generation device with built-in piezoelectric beams |
| Publication Number | Publication Date |
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| CN104868785Atrue CN104868785A (en) | 2015-08-26 |
| CN104868785B CN104868785B (en) | 2017-09-05 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510213312.5AExpired - Fee RelatedCN104868785B (en) | 2015-04-30 | 2015-04-30 | A cylindrical vortex-induced vibration power generation device with built-in piezoelectric beams |
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