CN217590635U - Follow-up magnetic coupling piezoelectric energy collector - Google Patents
Follow-up magnetic coupling piezoelectric energy collector Download PDFInfo
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- CN217590635U CN217590635U CN202122279901.7U CN202122279901U CN217590635U CN 217590635 U CN217590635 U CN 217590635U CN 202122279901 U CN202122279901 U CN 202122279901U CN 217590635 U CN217590635 U CN 217590635U
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Abstract
The invention discloses a follow-up magnetic coupling piezoelectric energy collector which comprises a base, a support frame, a bearing seat, a bearing, a connecting rod, a pendulum bob, a cantilever beam, a piezoelectric sheet, a moving magnet, a rotating frame, a static magnet and a fixed connecting rod. The support frame links firmly with the base, and the bearing frame is connected on the support frame, the bearing is fixed in the bearing frame, and the connecting rod links firmly with the bearing inner circle, and the pendulum links firmly through the screw thread with the connecting rod, and the cantilever beam clamping is fixed by the bolt in the connecting rod draw-in groove, and the piezoelectric patches is pasted in the cantilever beam both sides, and the swivel mount left and right both ends link firmly with the connecting rod and link firmly the pole respectively through the round pin axle, and moving magnet is fixed at the cantilever beam tip by the bolt, moves the alignment with bonding the magnetostatic iron who links firmly the pole tip. The invention converts the vibration energy into electric energy through the piezoelectric coupling effect, amplifies the vibration amplitude by utilizing the nonlinear magnetic repulsion force and expands the vibration frequency band; meanwhile, the system can acquire vibration energy in the maximum acceleration direction in real time under the action of the pendulum bob, and the energy acquisition efficiency of the system is effectively improved.
Description
Technical Field
The invention relates to the technical field of energy capture, in particular to a follow-up magnetic coupling piezoelectric energy collector.
Background
Most of the existing piezoelectric energy capture systems mainly utilize the bending deformation of the piezoelectric beam and the piezoelectric coupling beam to convert mechanical vibration energy in the environment into electric energy by the piezoelectric vibrator, so that power is supplied to microelectronic equipment, frequent chemical electromagnetic replacement is avoided, the working reliability of the electric equipment is effectively improved, and meanwhile, the pollution to the environment is reduced.
In practice, however, vibrations are very harmful in many cases, for which reason various measures are often taken to suppress such vibrations. Generally, a well-designed, manufactured and installed device has a low vibration level, and if the vibration energy of the vibration energy capturing system is not sufficiently collected, the output electric energy is very small and is difficult to reach an applicable level; moreover, because the inherent frequency of the piezoelectric energy collector is discontinuous, the piezoelectric vibrator can be greatly deformed only when the excitation frequency is consistent with the modal frequency, so that the larger electric energy output is ensured; meanwhile, many piezoelectric energy collecting systems mainly apply unidirectional or multi-directional mechanical vibration energy collection, and the vibration energy cannot be effectively converted into the electric energy of the piezoelectric plate, so that the application requirements of broadband and multidirectional high-performance power supply cannot be met. It can be seen that the piezoelectric vibration energy capture technology based on linear vibration, unidirectional or limited directional energy collection has great limitations in many applications.
Therefore, magnetic field force is introduced into the piezoelectric coupling cantilever beam structure, the nonlinear characteristic of the energy collector can be increased by adjusting the distance between the moving magnet and the static magnet and the mass of the magnet, so that the system can obtain larger vibration energy in a wider working frequency band, and the piezoelectric energy collection power supply frequency band is effectively expanded. Meanwhile, in order to enable the piezoelectric energy collector to obtain the maximum excitation energy in real time, an inertia link is arranged on the magnetic coupling piezoelectric energy collection system, so that the system can adjust the vibration direction of the piezoelectric coupling cantilever beam according to the maximum excitation acceleration, the maximum vibration energy is collected efficiently in real time, and the electric energy output characteristic of the system is effectively improved.
Disclosure of Invention
The invention aims to solve the problems and provide a follow-up magnetic coupling piezoelectric energy collector to obtain the maximum vibration energy generated in industrial production in real time and convert the maximum vibration energy into electric energy to supply power for micro electric equipment.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a follow-up magnetic coupling piezoelectric energy collector, includes base, support frame, bearing, connecting rod, pendulum, cantilever beam, piezoelectric patches, moving magnet, swivel mount, magnetostatic iron, links firmly the pole, the support frame is fixed on the base, the bearing frame is fixed on the support frame, the bearing is installed in the bearing frame, it is fixed that the connecting rod passes bearing and bearing inner race, the pendulum passes through the screw hole of connecting rod fixed, the cantilever beam presss from both sides in the draw-in groove of connecting rod, together fixed with the connecting rod through the bolt, the piezoelectric patches pastes in the cantilever beam both sides, it is fixed with the cantilever beam that moving magnet passes through the bolt, magnetostatic iron aligns and moving magnet level and glues the tip at solid connecting rod, the rotation of solid connecting rod is realized rotating with the cantilever beam through the rotation of swivel mount.
According to the preferred embodiment of the invention, the piezoelectric sheets are adhered to the upper side and the lower side of the cantilever beam, the lead is welded on the piezoelectric sheets, the vibration of the piezoelectric sheets is driven by the vibration of the cantilever beam, the vibration energy is converted into the electric energy, and finally the electric energy is output by the lead.
According to a preferred embodiment of the invention, the pendulum is fixed by means of a threaded hole of a connecting rod.
According to the preferred embodiment of the invention, the movable magnet is fixed with the connecting rod through four bolts through the clamping groove on the movable magnet, and the whole system can replace magnets with different specifications as required.
The technical scheme of the invention has the following beneficial effects:
according to the technical scheme, the characteristic that the inertia pendulum bob adapts to the variation of the excitation states under different working conditions in a follow-up manner is utilized, the inertia pendulum bob drives the connecting rod to rotate, and then the piezoelectric coupling cantilever beam is driven to rotate, so that the requirement of acquiring the maximum mechanical energy under different excitation environments is met; meanwhile, the vibration amplitude of the piezoelectric coupling cantilever beam is increased under the action of the nonlinear magnetic repulsion of the moving magnet and the static magnet, and the energy acquisition frequency band of the system is expanded, so that the system can collect larger vibration energy in a wider frequency band, and the vibration energy is fully converted into electric energy to be supplied to electric equipment through the piezoelectric effect. For the current situation that the current piezoelectric energy capture mechanism based on linear vibration and directional type has larger limitation in many application occasions, the follow-up magnetic coupling piezoelectric energy collector provided by the invention provides a new possibility for energy capture.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural diagram of a follow-up magnetic coupling piezoelectric energy harvester according to an embodiment of the present invention;
FIG. 2 is a schematic connection diagram of a connecting rod, a bearing, a cantilever beam, a moving magnet, a static magnet, a rotating frame, a fixed connecting rod and a pendulum bob in the servo magnetic coupling piezoelectric energy collector according to the embodiment of the invention;
fig. 3 is a schematic structural diagram of a connecting rod in the servo magnetic coupling piezoelectric energy collector according to the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a rotating frame in the servo magnetic coupling piezoelectric energy collector according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a fixed connecting rod in the servo magnetic coupling piezoelectric energy harvester according to the embodiment of the invention;
fig. 6 is a schematic structural view of a piezoelectric sheet coupled cantilever beam in the servo magnetic coupling piezoelectric energy collector according to the embodiment of the present invention;
fig. 7 is a frequency response curve of the servo magnetic coupling piezoelectric energy harvester according to the embodiment of the present invention;
fig. 8 is a voltage positive sweep image of the servo magnetic coupling piezoelectric energy harvester according to the embodiment of the present invention;
fig. 9 is a voltage inverse scan frequency image of the servo magnetic coupling piezoelectric energy harvester according to the embodiment of the present invention;
the reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
the device comprises a base 1, a support frame 2, a bearing seat 3, a bearing 4, a connecting rod 5, a pendulum bob 6, a cantilever beam 7, a piezoelectric plate 8, a moving magnet 9, a rotating frame 10, a static magnet 11 and a fixed connecting rod 12.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
As shown in fig. 1, a follow-up magnetic coupling piezoelectric energy harvester is characterized in that: including base 1, support frame 2, bearing frame 3, bearing 4, connecting rod 5, pendulum 6, cantilever beam 7, piezoelectric patches 8, moving magnet 9, swivel mount 10, magnetostatic iron 11, link firmly pole 12, support frame 2 fixes on base 1, bearing frame 3 is fixed in support frame 2, bearing 4 fixes on bearing frame 3, connecting rod 5 passes through the nut to be fixed on bearing 4, pendulum 6 fixes on connecting rod 5, cantilever beam 7 fixes on connecting rod 5, piezoelectric patches 8 pastes in cantilever beam 7 both sides, it is fixed with cantilever beam 7 that moving magnet 9 passes through the bolt, connecting rod 5 is connected to swivel mount 10 left end, and the right-hand member is fixed with link firmly pole 12 through the round pin axle, magnetostatic iron 11 glues at connecting rod 12 tip and aligns with moving magnet 9. .
Wherein, the outer ring of the bearing 4 is fixed with the bearing seat 3, and the inner ring is fixed with the connecting rod 5.
As shown in fig. 2, the moving magnet has a slot and four small holes for fixing with the cantilever.
As shown in FIG. 3, the rear end of the connecting rod has a threaded hole for connecting the pendulum, and the front end has a slot and four small holes for fixing the cantilever.
The specific movement is as follows:
follow-up magnetic coupling piezoelectric energy collector, support frame 2 is fixed on base 1, bearing frame 3 is fixed in support frame 2, bearing 4 is fixed on bearing frame 3, connecting rod 5 is fixed on bearing 4, pendulum 6 is fixed on connecting rod 5, cantilever beam 7 is fixed on connecting rod 5, piezoelectric patches 8 are pasted on cantilever beam 7 both sides, moving magnet 9 passes through the bolt and is fixed with cantilever beam 7, connecting rod 10 is connected to swivel mount 10 left end, the right-hand member links firmly with linking firmly pole 12 through the round pin axle, magnetostatic iron 11 glues at solid connecting rod 12 tip and aligns with moving magnet 9.
The pendulum bob drives the connecting rod to rotate under the action of inertia force, the rotating frame connected with the connecting rod is driven to rotate through the rotation of the connecting rod, and then the fixed connecting rod is driven to synchronously rotate, so that the static magnet and the moving magnet are kept horizontally aligned, because the connecting rod is connected with the supporting frame through the bearing, the energy loss caused by friction can be reduced to a great extent, the cantilever beam is ensured to obtain the direction of the maximum exciting force in real time, the piezoelectric coupling cantilever beam can reliably collect the maximum vibration energy and convert the maximum vibration energy into electric energy for application, the frequency band of the coupling system is expanded and the vibration amplitude is increased through the nonlinear magnetic repulsion between the two magnets, and therefore greater vibration energy is obtained, the requirement of efficient power supply is met, and the electric energy output characteristic of the system is shown in figures 7-9.
Claims (7)
1. The utility model provides a follow-up magnetic coupling piezoelectricity energy collector which characterized in that: including base (1), support frame (2), bearing frame (3), bearing (4), connecting rod (5), pendulum (6), cantilever beam (7), piezoelectric patches (8), move magnet (9), swivel mount (10), magnetostatic iron (11), link firmly pole (12), support frame (2) are fixed on base (1), support frame (2) are fixed in bearing frame (3), bearing (4) are fixed on bearing frame (3), connecting rod (5) are fixed on bearing (4), pendulum (6) are fixed on connecting rod (5) through threaded connection, cantilever beam (7) are fixed on connecting rod (5), piezoelectric patches (8) are pasted in cantilever beam (7) both sides, it is fixed with cantilever beam (7) through the bolt to move magnet (9), swivel mount (10) left end is fixed with magnetostatic connecting rod (5) through the round pin axle, and the right-hand member is fixed with link firmly pole (12) through the round pin axle, iron (11) glue at solid connecting rod (12) tip and align with moving magnet (9).
2. The follow-up magnetic coupling piezoelectric energy harvester of claim 1, wherein: the cantilever beam (7), the moving magnet (9), the fixed connecting rod (12) and the static magnet (11) synchronously rotate along with the connecting rod (5) and the rotating frame (10), and magnetic poles of the moving magnet and the static magnet are arranged oppositely to generate repulsive force, so that the vibration deformation of the cantilever beam is increased, and the electric energy acquisition frequency band is effectively expanded.
3. The follow-up magnetic coupling piezoelectric energy harvester according to claim 1, wherein: the pendulum bob (6) is fixed through a threaded hole of the connecting rod (5).
4. The follow-up magnetic coupling piezoelectric energy harvester of claim 1, wherein: the movable magnet (9) is fixed with the connecting rod (5) through four bolts through a clamping groove on the movable magnet, and magnets of different specifications can be replaced according to requirements in the whole system.
5. The follow-up magnetic coupling piezoelectric energy harvester of claim 1, wherein: the pendulum bob (6) can adjust the direction of the piezoelectric cantilever beam (7) according to the environmental vibration, so as to obtain the maximum vibration energy.
6. The follow-up magnetic coupling piezoelectric energy harvester of claim 1, wherein: the piezoelectric sheets (8) are symmetrically adhered to the cantilever beam (7) on two sides of the cantilever beam (7), the polarization directions of the piezoelectric sheets (8) are the same, and the two piezoelectric sheets (8) synchronously output electric energy.
7. The follow-up magnetic coupling piezoelectric energy harvester of claim 1, wherein: the piezoelectric patches (8) are adhered to the upper side and the lower side of the cantilever beam (7), wires are welded on the piezoelectric patches (8), and the wires on the sides of the piezoelectric patches with the same polarity are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122279901.7U CN217590635U (en) | 2021-09-17 | 2021-09-17 | Follow-up magnetic coupling piezoelectric energy collector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122279901.7U CN217590635U (en) | 2021-09-17 | 2021-09-17 | Follow-up magnetic coupling piezoelectric energy collector |
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| Publication Number | Publication Date |
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| CN217590635U true CN217590635U (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122279901.7U Active CN217590635U (en) | 2021-09-17 | 2021-09-17 | Follow-up magnetic coupling piezoelectric energy collector |
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| CN (1) | CN217590635U (en) |
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2021
- 2021-09-17 CN CN202122279901.7U patent/CN217590635U/en active Active
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