CN204408216U - A kind of piezoelectric generating device gathering wind energy - Google Patents

Abstract

The utility model discloses a kind of piezoelectric generating device gathering wind energy, comprising: base, fixed head, fixed block, fan, rotating shaft, flywheel, short cylindrical, connecting rod, support, impact block and cantilever beam piezoelectric vibrators; Described fixed head, fixed block, support are fixed on described base plate; Described cantilever beam piezoelectric vibrators one end is fixed between described fixed head and fixed block; Described fixed head is provided with the hole perpendicular to plate face horizontal direction, and described rotating shaft is arranged in the hole of fixed head; Described fan is connected with flywheel the both sides being arranged on described fixed head respectively by described rotating shaft; Described short cylindrical is fixed on described flywheel; Described connecting rod connects described short cylindrical and impact block respectively; Described impact block is arranged on the bracket, and the tail end of impact block is against in described cantilever beam piezoelectric vibrators.By the way, wind energy transformation can be electric energy by the utility model, environmental protection; And volume is little, structure simple, cost is low.

Description

A piezoelectric power generation device for harvesting wind energy

technical field

The utility model relates to the field of energy technology, in particular to a piezoelectric power generation device for collecting wind energy.

Background technique

Wind energy is a conversion form of solar energy, and it is a renewable and available natural energy that does not produce any pollutant emissions. The traditional wind power generation uses the wind load to cause the rotor to rotate, and further uses the relative motion between the rotor and the stator to cut the magnetic lines of force to generate induced electromotive force to realize the power supply to the load. However, this power supply method has a large scale and complicated process, and is not suitable for power supply of microelectronic devices.

In recent years, with the rapid development of large-scale distributed wireless sensing systems and microelectronic devices, although the traditional chemical battery energy supply method meets the demand to a certain extent, its disadvantages are becoming more and more obvious, such as large volume, It has a limited lifespan and needs to be replaced regularly. The piezoelectric energy harvester based on the wind-induced vibration principle converts the wind energy into the vibration energy of the structure by using the wind-induced vibration mechanism, and then converts the vibration energy of the structure into electrical energy by using the piezoelectric effect. It has the advantages of small size, simple structure, and low cost. It can be used as a micro power supply to replace the traditional battery power supply, especially suitable for microelectronic devices placed outdoors.

Utility model content

The technical problem mainly solved by the utility model is to provide a piezoelectric power generation device for collecting wind energy, which can convert wind energy into electric energy, is green and environmentally friendly; and has small volume, simple structure and low cost.

In order to solve the above technical problems, a technical solution adopted by the utility model is to provide a piezoelectric power generation device for collecting wind energy, including: a base, a fixed plate, a fixed block, a fan, a rotating shaft, a flywheel, a short cylinder, a connecting rod, and a bracket , an impact block and a cantilever beam piezoelectric vibrator; the fixed plate, the fixed block, and the bracket are fixed on the bottom plate; one end of the cantilever beam piezoelectric vibrator is fixed between the fixed plate and the fixed block; the fixed plate There are holes perpendicular to the horizontal direction of the plate surface, and the rotating shaft is set in the hole of the fixing plate; the fan and the flywheel are respectively connected and arranged on both sides of the fixing plate through the rotating shaft; the short cylinder is fixed on On the flywheel; the connecting rod is respectively connected to the short cylinder and the impact block; the impact block is arranged on the support, and the tail end of the impact block is against the cantilever beam piezoelectric vibrator.

Preferably, the bracket is provided with a rectangular notch, and both side walls of the rectangular notch are provided with horizontal rectangular grooves; the position of the impact block relative to the rectangular groove on the bracket is provided with a rectangular platform, and the rectangular platform and Compatible with rectangular slots.

Preferably, a clamping block is provided at one end of the impact block, and the connecting rod is arranged between the clamping blocks through a pin shaft.

Preferably, the cantilever beam piezoelectric vibrator includes a piezoelectric ceramic sheet, a thin steel sheet and a mass block; the piezoelectric ceramic sheet is pasted on both sides of the thin steel sheet; the mass block is pasted on the piezoelectric The free end of the ceramic piece.

Preferably, the center of the flywheel is thinned, and there are partial holes distributed on the flywheel.

Preferably, a bearing is arranged in the hole of the fixing plate, and the rotating shaft is arranged in the bearing; flat keys are arranged between the rotating shaft, the fan and the flywheel.

The beneficial effects of the utility model are: the utility model can convert wind energy into electric energy, is green and environmentally friendly; and has small volume, simple structure and low cost.

Description of drawings

Figure 1 is a three-dimensional structural schematic diagram of a preferred embodiment of a piezoelectric power generation device for collecting wind energy in the present utility model;

Figure 2 is a structural schematic diagram of a cantilever beam piezoelectric vibrator in a piezoelectric power generation device for collecting wind energy of the present utility model;

The marks of each part in the accompanying drawings are as follows: 1. base; 2. fixed plate; 3. fixed block; 4. fan; 5. rotating shaft; 6. flywheel; 7. short cylinder; 8. connecting rod; 1. Impact block; 11. Cantilever beam piezoelectric vibrator; 12. Thin steel sheet; 13. Piezoelectric ceramic sheet; 14. Mass block.

Detailed ways

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, so that the protection scope of the utility model can be defined more clearly .

Please refer to Fig. 1 and Fig. 2, the utility model embodiment comprises:

A piezoelectric power generation device for collecting wind energy, comprising: a base 1, a fixed plate 2, a fixed block 3, a fan 4, a rotating shaft 5, a flywheel 6, a short cylinder 7, a connecting rod 8, a bracket 9, an impact block 10, a cantilever beam pressure An electric vibrator 11, a thin steel sheet 12, a piezoelectric ceramic sheet 13 and a mass block 14; the fixed plate 2, the fixed block 3 and the bracket 9 are fixed on the bottom plate 1; one end of the cantilever beam piezoelectric vibrator 11 is set Between the gap between the fixed plate 2 and the fixed block 3, it is fixed by screw compression; the cantilever beam piezoelectric vibrator 11 is a plurality of cantilever beam piezoelectric vibrators; the fixed plate 2 is provided with The hole in the horizontal direction, the rotating shaft 5 is arranged in the hole, the fan 4 and the flywheel 6 are respectively connected and arranged on both sides of the fixed plate 3 through the rotating shaft 5; the short column 7 is fixed on the flywheel 6 Above; the connecting rod 8 is respectively connected to the short cylinder 7 and the impact block 10, and the connecting rod 8 can rotate around the short cylinder 7; the impact block 10 is arranged on the support 9, and the support 9 can The impact block 10 is limited to a certain extent; the tail end of the impact block 10 is designed such that a beam abuts against the cantilever piezoelectric vibrator 11 , and the span of the beam is just enough to collide with all the cantilever piezoelectric vibrators 11 . A bearing is arranged between the rotating shaft 5 and the hole of the fixed plate 2; the two ends of the rotating shaft 5 are provided with flat keys, and the flat keys are respectively connected to the fan 4 and the flywheel 6, and the fan 4 and the flywheel 6 are fixed on the On the rotating shaft 5; the flat key connection can determine that the rotation of the rotating shaft 5 will drive the fan 4 and the flywheel 6 to rotate. The bracket 9 is provided with a rectangular notch, and both side walls of the rectangular notch are provided with horizontal rectangular grooves. The position of the impact block 10 relative to the rectangular groove on the bracket 9 is provided with a rectangular platform, and the rectangular platform can slide on the rectangular groove. One end of the impact block 10 is provided with a clamping block, and one end of the connecting rod 8 is arranged between the clamping blocks, the clamping block and the connecting rod 8 are connected through a pin shaft, and the clamping block and the connecting rod 8 can be wound around the pin shaft turn. The cantilever beam piezoelectric vibrator 11 includes a thin steel sheet 12, an electric ceramic sheet 13 and a mass block 14; the two sides of the thin steel sheet 12 are respectively pasted with the piezoelectric ceramic sheet 13; the mass block 14 is pasted on The free end of the piezoelectric ceramic sheet 13 can reduce the natural frequency of the cantilever piezoelectric vibrator 11, making it easier to resonate. The central position of the flywheel 6 is thinned, and there are local holes distributed on the flywheel 6, and the thickness and radius of the flywheel 6 are small in design, thereby ensuring that the moment of inertia is small, so the drive shaft 5 is under the action of a small driving torque. can be rotated.

Due to the instability of the wind force in the environment, the frequency of action of the impact block 10 also changes within a certain range. Multiple cantilever beam piezoelectric vibrators 11 can be designed in different sizes, so that each cantilever beam piezoelectric vibrator 11 has different natural frequencies. In this way, when the action frequency of the impact block 10 changes, one of the plurality of cantilever piezoelectric vibrators 11 may resonate, thereby increasing the output voltage of the cantilever piezoelectric vibrator 11 .

When working, the wind drives the fan 4 to rotate, and the fan 4 drives the rotating shaft 5 to rotate, so that the flywheel 6 on the rotating shaft 5 rotates; when the flywheel 6 rotates, it drives the connecting rod 8 to move in the plane, and the connecting rod 8 drives the impact rod 10 to move in the plane , the impact block 10 only moves linearly in the horizontal direction under the constraints of the bracket 9; due to the linear motion back and forth of the impact block 10, the tail of the impact rod 10 constantly hits the cantilever beam piezoelectric vibrator 11; the cantilever beam piezoelectric vibrator 11 Deformation occurs under the impact of the impact block 10, and the two surfaces of the piezoelectric ceramic sheet 13 generate a potential difference, which can provide electric energy.

The utility model can convert wind energy into electric energy, is green and environment-friendly; and has small volume, simple structure and low cost.

The above descriptions are only embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the description of the utility model and the contents of the accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (6)

1. A piezoelectric generating device for gathering wind energy, characterized in that it comprises: a base, a fixed plate, a fixed block, a fan, a rotating shaft, a flywheel, a short cylinder, a connecting rod, a support, an impact block and a cantilever beam piezoelectric vibrator; The fixed plate, the fixed block, and the bracket are fixed on the bottom plate; one end of the cantilever beam piezoelectric vibrator is fixed between the fixed plate and the fixed block; the fixed plate is provided with a hole perpendicular to the horizontal direction of the plate surface , the rotating shaft is arranged in the hole of the fixed plate; the fan and the flywheel are respectively connected and arranged on both sides of the fixed plate through the rotating shaft; the short cylinder is fixed on the flywheel; the connecting rods are respectively connected The short cylinder and the impact block; the impact block is arranged on the support, and the tail end of the impact block is against the cantilever beam piezoelectric vibrator. 2. A piezoelectric generating device for collecting wind energy according to claim 1, characterized in that: the support is provided with a rectangular notch, and both side walls of the rectangular notch are provided with horizontal rectangular grooves; The position of the impact block relative to the rectangular groove on the bracket is provided with a rectangular platform, and the rectangular platform matches the rectangular groove. 3 . The piezoelectric power generation device for harvesting wind energy according to claim 2 , wherein a clamping block is provided at one end of the impact block, and the connecting rod is arranged between the clamping blocks through a pin shaft. 4 . 4. A piezoelectric generating device for collecting wind energy according to claim 1, characterized in that: the cantilever beam piezoelectric vibrator comprises a piezoelectric ceramic sheet, a thin steel sheet and a mass block; the piezoelectric ceramic sheet is pasted On both sides of the thin steel sheet; the mass block is pasted on the free end of the piezoelectric ceramic sheet. 5 . The piezoelectric power generation device for harvesting wind energy according to claim 1 , characterized in that: the center of the flywheel is thinned, and local holes are distributed on the flywheel. 5 . 6. A piezoelectric power generation device for collecting wind energy according to claim 1, characterized in that: a bearing is arranged in the hole of the fixed plate, and the rotating shaft is arranged in the bearing; the rotating shaft is connected with the fan and There are flat keys between the flywheels.