阅读说明：本技术 一种基于pzt悬臂梁的旋转能量采集器 (Rotary energy collector based on PZT cantilever beam ) 是由 李以贵 董璇 张成功 王保志 于 2020-05-29 设计创作，主要内容包括：本发明涉及一种基于PZT悬臂梁的旋转能量采集器,包括环形绝缘件、固定于环形绝缘件内侧的弹性挡片、设于所述环形绝缘件内部的转轴以及固定于所述转轴端部的若干个PZT悬臂梁；所述环形绝缘件和转轴进行相对旋转并使弹性挡片和PZT悬臂梁碰撞,所述转轴的材质为导电材质。与现有技术相比,本发明具有结构简单、容易实施、能量收集利用率高等优点。(The invention relates to a rotary energy collector based on PZT cantilever beams, which comprises an annular insulating part, an elastic baffle fixed on the inner side of the annular insulating part, a rotating shaft arranged in the annular insulating part and a plurality of PZT cantilever beams fixed at the end part of the rotating shaft, wherein the elastic baffle is arranged on the inner side of the annular insulating part; the annular insulating part and the rotating shaft rotate relatively to each other and enable the elastic blocking piece to collide with the PZT cantilever beam, and the rotating shaft is made of a conductive material. Compared with the prior art, the invention has the advantages of simple structure, easy implementation, high energy collection and utilization rate and the like.)

1. A rotary energy collector based on PZT cantilever beams is characterized by comprising an annular insulating part (4), an elastic blocking piece (5) fixed on the inner side of the annular insulating part (4), a rotating shaft (1) arranged inside the annular insulating part (4) and a plurality of PZT cantilever beams (3) fixed at the end part of the rotating shaft (1); the annular insulating part (4) and the rotating shaft (1) rotate relatively, and the elastic baffle (5) collides with the PZT cantilever beam (3); the rotating shaft (1) is made of a conductive material.

2. The PZT cantilever beam-based rotary energy harvester of claim 1, wherein a slot is arranged at the inner side of the annular insulating part (4), and the end part of the elastic baffle (5) is clamped with the slot.

3. A PZT cantilever beam based rotary energy harvester according to claim 1, wherein the end of the flexible flap (5) is fixed inside the ring-shaped insulator (4) by glue.

4. The PZT cantilever beam-based rotary energy harvester of claim 1, wherein a plurality of elastic blocking pieces (5) are uniformly installed on the inner side of the annular insulating member (4).

5. The PZT cantilever beam-based rotary energy harvester of claim 1, wherein the elastic barrier (5) is an arc-shaped sheet structure.

6. The PZT cantilever beam-based rotary energy harvester according to claim 5, wherein when the annular insulating member (4) and the rotating shaft (1) rotate relatively, the PZT cantilever beam (3) collides with the outer arc surface of the elastic baffle (5).

7. The PZT cantilever beam-based rotary energy harvester according to claim 1, wherein a plurality of PZT cantilever beams (3) are uniformly installed at the end of the rotating shaft (1).

8. The PZT cantilever beam-based rotary energy harvester according to claim 1, wherein the rotating shaft (1) is provided with a slot, and the PZT cantilever beam (3) is clamped with the slot.

9. The PZT cantilever beam-based rotary energy harvester of claim 1, wherein a clamp for clamping the PZT cantilever beam (3) is fixed on the rotating shaft (1).

10. The PZT cantilever beam-based rotary energy harvester of claim 1, wherein the elastic barrier (5) is an elastic plastic sheet, and the annular insulator is made of a polyethylene plate.

Technical Field

The invention relates to a PZT piezoelectric ceramic material, in particular to a rotary energy collector based on a PZT cantilever beam.

Background

In production and life, a plurality of modes for achieving the required purposes through rotation of the device exist, and the rotation of the device can achieve the required purposes and can generate energy. Currently, the energy generated in these rotations is only wasted, since there is no method to collect this kind of energy exclusively. The PZT piezoelectric ceramics can convert mechanical energy into electric energy based on the principle of the piezoelectric effect, thereby realizing secondary utilization or energy collection and storage. The piezoelectric effect is: when the crystal is acted by external force in a certain fixed direction, electric polarization phenomenon is generated inside the crystal, and charges with opposite signs are generated on two surfaces; when the external force is removed, the crystal returns to an uncharged state; when the direction of the external force action is changed, the polarity of the charges is changed; the charge quantity generated by the crystal under the action of force is in direct proportion to the magnitude of the external force. At present, a plurality of electric appliances are installed on some equipment, power needs to be supplied to the electric appliances, and the number of the parts on the equipment is large due to the fact that the power is supplied independently.

Chinese patent CN 102723894 a discloses a rotary piezoelectric power generation device, which comprises a rotary shaft, a front excitation wheel, a rear excitation wheel, and a piezoelectric bimorph beam array, wherein the piezoelectric bimorph beam array is arranged between the front excitation wheel and the rear excitation wheel; the front excitation wheel and the rear excitation wheel respectively comprise a wheel disc and excitation permanent magnet blocks, and the excitation permanent magnet blocks of the front excitation wheel and the excitation permanent magnet blocks of the rear excitation wheel are arranged in a staggered manner in space; the piezoelectric bimorph beam array comprises a hub and piezoelectric bimorph beams, each piezoelectric bimorph beam comprises a cantilever beam, a piezoelectric ceramic piece and a piezoelectric beam permanent magnet block are respectively arranged on the beam body of the cantilever beam, and permanent magnetic repulsion forces can be respectively formed between the piezoelectric beam permanent magnet blocks and the excitation permanent magnet blocks of the front excitation wheel and the rear excitation wheel. Therefore, under the driving of the rotation of the rotating shaft, the two excitation wheels alternately generate repulsion force on the piezoelectric bimorph beams of the piezoelectric bimorph beam array, so that the piezoelectric bimorph beams generate higher frequency and larger forced deformation, and the rotation energy of the rotating shaft is more effectively utilized. The patent technology utilizes the non-contact permanent magnetic force to transfer acting force, avoids the defects of energy loss and service life reduction caused by mechanical impact, but also has the defects of complex structure and relative difficulty in manufacturing.

Disclosure of Invention

The invention aims to overcome the defects of complex structure and large energy loss of energy transmitted in a contact mode of a rotary energy collector in the prior art, and provides a rotary energy collector based on a PZT cantilever beam.

The purpose of the invention can be realized by the following technical scheme:

a rotary energy collector based on PZT cantilever beams comprises an annular insulating part, an elastic baffle fixed on the inner side of the annular insulating part, a rotating shaft arranged in the annular insulating part and a plurality of PZT cantilever beams fixed at the end part of the rotating shaft; the annular insulating part and the rotating shaft rotate relatively to each other and enable the elastic blocking piece to collide with the PZT cantilever beam, and the rotating shaft is made of a conductive material.

Furthermore, the inner side of the annular insulating part is provided with a slot, and the end part of the elastic separation blade is clamped with the slot.

Further, the end part of the elastic baffle sheet is fixed on the inner side of the annular insulating part through glue.

Furthermore, a plurality of elastic blocking pieces are uniformly arranged on the inner side of the annular insulating part.

Further, the elastic baffle is of an arc-shaped sheet structure.

Further, when the annular insulating part and the rotating shaft rotate relatively, the PZT cantilever beam collides with the outer arc surface of the elastic retaining piece.

Furthermore, a plurality of PZT cantilever beams are uniformly arranged at the end part of the rotating shaft.

Furthermore, a slot is arranged on the rotating shaft, and the PZT cantilever beam is clamped with the slot.

Furthermore, a clamp for clamping the PZT cantilever beam is fixed on the rotating shaft.

Furthermore, the elastic baffle sheet is an elastic plastic sheet, and the annular insulating part is made of a polyethylene plate.

The application scenario of the application includes:

(1) fixing the annular insulating part, enabling the central rotating shaft to rotate, enabling the PZT cantilever beam to actively impact the elastic plastic sheet through rotation to obtain deformation, and obtaining energy through the piezoelectric effect; for example, when wind energy is collected, the wind cup can be fixed on the extension section of the central rotating shaft, the central shaft is pushed to rotate by wind speed, and at the moment, the electric brush is connected with the conductive central rotating shaft to conduct the obtained energy.

(2) When the energy generated by the self-rotating object is collected, the central shaft is fixed, the annular insulating material is fixed to the periphery of the central shaft of the bicycle wheel, and the elastic plastic sheet is enabled to hit the PZT cantilever beam to obtain the energy by rotating the annular insulating material.

Compared with the prior art, the invention has the following advantages:

(2) the invention utilizes the rotary energy collector to collect the energy which is wasted when the object rotates, the energy collected by the energy collector can directly supply power for some sensors, thereby avoiding the arrangement of more power supplies for the sensors, and the energy collector does not need to be switched on or off, so that the object can be regarded as starting to work when running, and simultaneously supplies power for the sensors and the like which need to work.

(2) Compared with the existing contact type wind energy absorption for transmitting energy, the flexible barrier structure is selected, so that the rigid contact between the PZT cantilever beam and the barrier is changed into the flexible contact, the mechanical energy loss is greatly reduced, and the PZT cantilever beam cannot be damaged; meanwhile, the blocking piece is made of an elastic plastic sheet, such as a PE sheet, the elastic blocking piece is in an arc structure, and the PZT cantilever beam passes through the outer side of the arc of the elastic blocking piece when colliding with the elastic blocking piece, so that the energy loss in the collision process is further reduced; as the PZT cantilever beam is brushed outside the arc of the elastic blocking piece, the obstruction to the vibrating cantilever beam is smaller than the stop effect of rigid contact, and the mechanical energy loss and the loss to the cantilever beam and the elastic blocking piece are reduced.

(3) Compared with the existing PZT cantilever beam with magnetic force for contact impact, the PZT cantilever beam is simple in structure and easy to implement.

Drawings

FIG. 1 is a schematic structural view of the present invention;

in the figure, 1 is a rotating shaft, 11 is a central shaft extension, 12 is a copper central shaft, 3 is a PZT cantilever beam, 4 is an annular insulating part, and 5 is an elastic baffle.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.