A wake vibration power generation device

Abstract

The present invention relates to the technical field of power generation equipment, and discloses a wake galloping power generation device. The wake galloping power generation device comprises a sealed box for fixing on a bridge, an elastic top cover is arranged on the top of the sealed box, a vibrating piston is also suspended and connected on the elastic top cover, an air inlet and an air outlet are arranged at the bottom of the sealed box, a galloping power generation assembly is arranged at the air inlet and / or the air outlet, and the galloping power generation assembly comprises an interference object and a vibrating member arranged at the downstream of the interference object at the airflow, and a piezoelectric sheet is arranged at the bottom of the vibrating member. The vibration of the bridge can cause the sealed box to vibrate, and the elastic top cover can drive the vibrating piston to vibrate up and down under the action of elasticity, and the pressure in the sealed box changes to cause gas flow, and the airflow generates wake galloping at the vibrating member after passing through the interference object, and the piezoelectric sheet at the bottom of the vibrating member is subjected to pressure to generate current, thereby converting the vibration energy of the bridge into electrical energy for reasonable utilization, improving the utilization rate of energy, and promoting the sustainable development of the city.

Description

Technical Field

[0001] The invention relates to the technical field of power generation equipment, and in particular to a wake galloping power generation device. Background Art

[0002] Energy and environmental issues are important topics today. With the development of the economy, non-renewable energy such as coal, oil, and natural gas is decreasing, while the development and search for environmentally friendly renewable energy is at a bottleneck stage. How to reasonably utilize existing resources has a good promoting effect on the sustainable development of society.

[0003] Bridges are an indispensable part of urban construction. During the use of bridges, as people and vehicles move around, bridge vibration is always unavoidable. Vibration is the process of energy transmission. Normally, bridge vibration energy is usually buffered and dissipated by supporting structures such as piers. If the bridge vibration energy is reasonably converted and utilized, it will be of great significance to the sustainable development of the city. Summary of the invention

[0004] The purpose of the present invention is to provide a wake vibration power generation device for rationally converting and utilizing bridge vibration energy.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a wake vibration power generation device, including a sealed box for fixing on a bridge, the top of the sealed box is provided with an elastic top cover, and a vibration piston is suspended on the elastic top cover, the bottom of the sealed box is provided with an air inlet and an air outlet, and a wake vibration power generation component is provided at the air inlet and / or the air outlet, and the wake vibration power generation component includes an interference object and a vibration member arranged at the downstream of the interference object in the airflow, and a piezoelectric sheet is arranged at the bottom of the vibration member.

[0006] Preferably, the bottom of the sealed box is provided with symmetrically arranged airflow ducts, and the air inlet and the air outlet are formed by the pipe openings of the airflow ducts.

[0007] Preferably, the interference object is a rectangular parallelepiped structure with a bottom fixed on the sealing box.

[0008] Preferably, the vibrating member is a steel bar whose bottom is fixed on the sealing box.

[0009] Preferably, the vibrating piston comprises a weight block connected to the elastic top cover and a bar magnet fixed to the bottom of the weight block, and a generating coil cooperating with the bar magnet is also arranged on the box wall of the sealed box.

[0010] Preferably, a flexible connecting rod is connected between the bottom of the vibration piston and the bottom of the sealing box, and a piezoelectric sheet is arranged at the bottom of the connecting rod.

[0011] Preferably, a plurality of connecting rods are arranged at intervals along the circumference of the vibration piston, and the piezoelectric sheet is arranged at the bottom of each connecting rod.

[0012] Preferably, the vibration piston comprises a body and a mass block arranged at the bottom of the body, and the top of the connecting rod is connected to the mass block.

[0013] Preferably, a one-way valve is provided at the air inlet and the air outlet respectively.

[0014] Preferably, the elastic top cover is an annular rubber cover, and the top of the vibration piston is connected to the inner ring of the rubber cover.

[0015] Compared with the prior art, the wake vibration power generation device in the embodiment of the present invention has the following beneficial effects: the vibration of the bridge can cause the sealed box to vibrate, and the elastic top cover can drive the vibrating piston to vibrate up and down under the action of elasticity. The pressure change in the sealed box causes the gas to flow, and the airflow generates wake vibration at the vibrating part after passing through the interference object. The piezoelectric sheet at the bottom of the vibrating part bears the pressure and generates current, thereby converting the vibration energy of the bridge into electrical energy for rational use, improving the energy utilization rate, and promoting the sustainable development of the city. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the wake galloping power generation device of the present invention;

[0017] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the wake galloping power generation device;

[0018] Figure 3 yes Figure 1 Schematic diagram of the structure of the connecting rod and piezoelectric piece of the wake vibration power generation device.

[0019] In the figure, 1. sealing box; 11. air flow duct; 2. elastic top cover; 3. vibrating piston; 31. weight block; 32. bar magnet; 33. mass block; 4. generating coil; 5. connecting rod; 6. piezoelectric sheet; 7. interference object; 8. vibrating part; 9. one-way valve. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] A preferred embodiment of a wake oscillation power generation device of the present invention is as follows: Figures 1 to 3As shown, the wake vibration power generation device includes a sealing box 1, a vibrating piston 3 and a vibration power generation assembly. The sealing box 1 is used to be fixed on the bridge. A connecting flange can be arranged at the bottom of the sealing box 1, and the sealing box 1 can be fixed on the bridge by bolts.

[0022] The top of the sealed box 1 is provided with an elastic top cover 2, which is an annular rubber cover, and the outer ring of the rubber cover is connected to the top of the sealed box 1. The inner ring of the rubber cover is connected to a vibration piston 3, which is suspended on the elastic top cover 2. When the bridge vibrates, the sealed box 1 can vibrate with the bridge, and because the rubber cover is elastic, the rubber block can drive the vibration piston 3 to vibrate up and down.

[0023] The vibrating piston 3 includes a weight block 31, a bar magnet 32 ​​and a mass block 33 arranged in sequence from top to bottom. The top of the weight block 31 is connected to the inner ring of the rubber cover, and the weight block 31 and the bar magnet 32 ​​form the body of the vibrating piston 3. The weight block 31 and the mass block 33 are used to increase the weight of the vibrating piston 3. Under the action of the weight block 31 and the mass block 33, the vibration amplitude of the vibrating piston 3 is greater than the vibration amplitude of the bridge. A generator coil 4 is also arranged on the box wall of the sealed box 1, and the generator coil 4 can be connected to an external power storage device through a wire. When the rubber cover drives the vibrating piston 3 to vibrate up and down in the sealed box 1, the bar magnet 32 ​​will reciprocate up and down in the generator coil 4, so that the magnetic flux in the generator coil 4 changes, thereby generating an induced current. After rectification, the induced current can transmit electrical energy to an external device through a wire, thereby converting the vibration energy of the bridge into electrical energy.

[0024] In this embodiment, the natural frequency of the whole of the elastic top cover 2 and the weight block 31 can be changed by adjusting the mass of the weight block 31 or the mass block 33 connected under the bar magnet 32, so that it is within the vibration frequency range of the bridge. When the natural frequency of the whole formed by the elastic top cover 2 and the weight block 31 is consistent with the vibration frequency of the bridge, the elastic top cover 2 and the weight block 31 will resonate with the bridge together, so that the utilization rate of the vibration energy can be maximized.

[0025] A connecting rod 5 is also connected between the mass block 33 of the vibration piston 3 and the bottom of the sealed box 1. The connecting rod 5 is flexible and can bend when subjected to force. In the present embodiment, the connecting rod 5 is a flexible steel bar with good elasticity, and can be restored to a straight rod after the force is released. There are six connecting rods 5 arranged at intervals along the circumference of the vibration piston 3, and piezoelectric sheets 6 are also arranged at the bottom of the six connecting rods 5, respectively. The piezoelectric sheets 6 can be connected to an external power storage device through a wire; in other embodiments, the number of connecting rods 5 can also be three, four or more, and so on. When the vibration piston 3 vibrates up and down, the mass block 33 moves downward and compresses the connecting rod 5, and the connecting rod 5 bends and applies pressure to the piezoelectric sheet 6. The piezoelectric sheet 6 generates current after being subjected to pressure, and the current can be transmitted to the power storage device through a wire to convert the vibration energy into electrical energy.

[0026] The bottom of the sealed box 1 is provided with an airflow duct 11, and there are two airflow ducts 11 in total. The two airflow ducts 11 are symmetrically arranged with the center line of the sealed box 1 as the axis, so that the gas can flow between the two airflow ducts 11. One of the pipe openings of the two airflow ducts 11 is an air inlet, and the other pipe opening is an air outlet. There are also one-way valves 9 arranged at the air inlet and the air outlet, respectively. The one-way valve 9 can limit the flow direction of the gas to ensure that the gas does not vibrate.

[0027] The air inlet and the air outlet are both provided with galloping power generation components, which include an interference object 7, a vibrating member 8 and a piezoelectric sheet 6. The vibrating member 8 is arranged at the downstream position of the interference object 7 along the gas flow direction, and the piezoelectric sheet 6 is arranged at the bottom of the vibrating member 8. In this embodiment, the interference object 7 is a rectangular parallelepiped structure, the bottom of the interference object 7 is fixed on the airflow duct 11, and the vibrating member 8 is a rigid steel bar.

[0028] The size of the interference object 7 and the natural frequency of the vibrator 8 can be designed according to the vibration frequency range of the bridge, and strive to have a sufficiently large amplitude to generate a larger current. In order to make wake galloping easier to occur, the distance between the rectangular interference object 7 and the rigid vibrator 8 can be 3 to 4 times the side length of the interference object 7, the cross-sectional width of the windward surface of the interference object 7 is less than or equal to the cross-sectional width of the side wind surface, and the distance between the interference object 7 and the vibrator 8 and the size of the interference object 7 can be appropriately adjusted according to the different wind speeds caused by different vibration conditions of the bridge. Under the action of the interference object 7, the airflow flowing to the vibrator 8 may cause wake galloping, increasing the vibration amplitude of the vibrator 8. When the vibrator 8 vibrates, the piezoelectric sheet 6 will be subjected to pressure to generate current, and the current is transmitted to the energy storage battery through the wire connecting the piezoelectric sheet 6.

[0029] The working process of the present invention is as follows: when vehicles or pedestrians pass on the bridge, the bridge will vibrate, and the vibrating piston suspended by the rubber cover will also vibrate along with the bridge. Due to the inertia of the weight block and the elasticity of the rubber cover, the amplitude of the weight block will be much larger than that of the bridge. When the vibrating piston vibrates downward, the air in the lower part of the sealed box is compressed, the gas pressure inside the sealed box increases, and the gas is discharged through the one-way valve at the outlet opened outward at the bottom of the sealed box, generating gas flow at the outlet. When the gas flow rate reaches the critical wind speed, the vibrating piece downstream of the rectangular interference object will vibrate with wake flow, so that the piezoelectric piece connected to the root of the steel bar is subjected to pressure to generate current, and the current is transmitted to the power storage device through the wire connected to the piezoelectric piece; when the gas in the sealed box is discharged, the air pressure in the sealed box decreases, the outside atmospheric pressure is greater than the air pressure in the sealed box, and the outside airflow enters the sealed box from the air inlet through the one-way valve opened inward at the bottom of the sealed box. The airflow from outside to inside flows through the rectangular interference object and generates wake flow vibration at the vibrating piece downstream thereof, so that the piezoelectric piece connected to the root of the steel bar is subjected to pressure to generate current, and the current is transmitted to the power storage device through the wire connected to the piezoelectric piece. When the sealed box is larger, the vibrating piston is correspondingly larger, the volume that can be compressed inside it is larger, the more airflow is compressed, and the stronger the power generation capacity is.

[0030] When the vibrating piston vibrates up and down, it drives the bar magnet to move up and down inside the generating coil. The magnetic flux passing through the generating coil will change accordingly, thereby generating an induced current; the induced current passes through the wire and is transmitted to the energy storage device after rectification.

[0031] When the vibrating piston vibrates downward, the mass block at the bottom also vibrates downward and compresses the flexible connecting rod, which bends and applies pressure to the piezoelectric sheet. The piezoelectric sheet generates current after being subjected to pressure, and the current is transmitted to the power storage device through the wires connecting the piezoelectric sheet. Since the bridge vibrates reciprocatingly, the pressure on the connecting rod is also reciprocating, so current will continue to be generated.

[0032] In summary, an embodiment of the present invention provides a wake vibration power generation device. The vibration of the bridge can cause the sealed box to vibrate. The elastic top cover can drive the vibrating piston to vibrate up and down under the action of elasticity. The pressure change in the sealed box causes the gas to flow. After the airflow passes through the interference object, wake vibration is generated at the vibrating part. The piezoelectric sheet at the bottom of the vibrating part is under pressure to generate current, thereby converting the vibration energy of the bridge into electrical energy for rational use, improving the energy utilization rate, and promoting the sustainable development of the city.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A wake vibration power generation device, characterized in that: It comprises a sealing box for fixing on a bridge, the top of the sealing box is provided with an elastic top cover, a vibration piston is suspended on the elastic top cover, an air inlet and an air outlet are provided at the bottom of the sealing box, a galloping vibration power generation assembly is provided at the air inlet and / or the air outlet, the galloping vibration power generation assembly comprises an interference object and a vibration member arranged at the downstream of the interference object in the air flow, a piezoelectric sheet is arranged at the bottom of the vibration member, the elastic top cover is an annular rubber cover, the outer ring of the rubber cover is connected to the top of the sealing box, and the top of the vibration piston is connected to the inner ring of the rubber cover.

2. The wake oscillation power generation device according to claim 1, characterized in that: The bottom of the sealed box is provided with symmetrically arranged airflow ducts, and the air inlet and the air outlet are formed by the pipe openings of the airflow ducts.

3. The wake oscillation power generation device according to claim 2, characterized in that: The interference object is a rectangular parallelepiped structure with a bottom fixed on the sealing box.

4. The wake oscillation power generation device according to claim 2, characterized in that: The vibrating member is a steel bar with a bottom fixed on the sealing box.

5. The wake galloping power generation device according to any one of claims 1 to 4, characterized in that: The vibrating piston comprises a weight block connected to the elastic top cover and a bar magnet fixed at the bottom of the weight block, and a generating coil matched with the bar magnet is also arranged on the box wall of the sealed box.

6. The wake galloping power generation device according to any one of claims 1 to 4, characterized in that: A flexible connecting rod is connected between the bottom of the vibration piston and the bottom of the sealing box, and a piezoelectric sheet is arranged at the bottom of the connecting rod.

7. The wake oscillation power generation device according to claim 6, characterized in that: A plurality of connecting rods are arranged at intervals along the circumference of the vibration piston, and the piezoelectric sheet is arranged at the bottom of each connecting rod.

8. The wake oscillation power generation device according to claim 6, characterized in that: The vibration piston comprises a body and a mass block arranged at the bottom of the body, and the top of the connecting rod is connected to the mass block.

9. The wake galloping power generation device according to any one of claims 1 to 4, characterized in that: The air inlet and the air outlet are respectively provided with a one-way valve.

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