CN203352482U - Limiting disc protection-based cantilever beam type rotating piezoelectric generator - Google Patents
Limiting disc protection-based cantilever beam type rotating piezoelectric generator Download PDFInfo
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- CN203352482U CN203352482U CN 201320406762 CN201320406762U CN203352482U CN 203352482 U CN203352482 U CN 203352482U CN 201320406762 CN201320406762 CN 201320406762 CN 201320406762 U CN201320406762 U CN 201320406762U CN 203352482 U CN203352482 U CN 203352482U
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Abstract
The utility model relates to a limiting disc protection-based cantilever beam type rotating piezoelectric generator and belongs to the piezoelectric electric power generation field. First stationary magnets are mounted on a side wall of a machine rack, an end part of the box body of the machine rack is mounted on an end cap through screws, second stationary magnets are mounted on the end cap, and an end of a rotating shaft is mounted on the machine rack through a bearing; a limiting disc, cantilever beam piezoelectric oscillators and check rings are mounted on a spline of the rotating shaft; the free end sides of the cantilever beam piezoelectric oscillators are connected with a limiting protrusion on the side wall of the limiting disc in a pressed manner; first moving magnets on a cantilever beam and the first stationary magnets are mounted in such a way that the same magnetic poles of the first moving magnets and the first stationary magnets are opposite to each other, the second moving magnets and the second stationary magnets are mounted in such a way that the same magnetic poles of the second moving magnets and the second stationary magnets are opposite to each other, and the first stationary magnets and the second stationary magnets are equal in number. The cantilever beam type rotating piezoelectric generator is characterized and advantageous in that the liming disc is used for supporting the cantilever beam piezoelectric oscillators in a contacting manner, and therefore large deformation of the fixed ends of the cantilever beam piezoelectric oscillators can be generated, and electricity generating capacity can be improved; through limiting effects, the cantilever beam piezoelectric oscillators can be prevented from damage caused by excessive deformation.
Description
Technical field
The utility model belongs to piezo-electric generating and self-powered applied technical field, is specifically related to a kind of beam type rotary piezoelectric generator based on the position-arresting disk protection.
Background technology
The research that utilizes the sheet type piezoelectric vibrator to construct microminiature rotary piezoelectric generator has become the focus of domestic and international lasting for years.For the difference of generator prime power source and application purpose, the beam type piezoelectric generator of various structures form has all been proposed at present, main involving vibrations formula and rotary two large types both at home and abroad.Wherein, rotary piezoelectric generator is that self-powered sensor monitoring for solving rotary body (as helicopter screw propeller, automotive tire pressure, aero-engine/bullet train/oil gas bore the self-powered sensor monitoring of main shaft etc.) proposes at first; In addition, the demand of micro wind turbine generator is also to expedite the emergence of the key element of rotary piezoelectric generator.With regard to generating/power supply capacity, the rotary electric magnetic generator is very ripe and be widely used, but because needing mover and stator, it does that relative motion and moving/stator dimensions is suitable, therefore complex structure, volume are large, can't or inconvenience need to generator and rotary body is mutually integrated for some small and tele-control system, especially be unsuitable for the occasion without relative motion such as automobile tire pressure monitoring system.By comparison, the sheet type piezoelectric vibrator because of simple in structure, volume is little and can be integrated with rotary body, therefore be considered to construct the effective ways of microminiature rotary generator.
Difference according to energisation mode, existing rotary piezoelectric generator can be divided into 3 large classes: 1. inertia-powered formula, utilize piezoelectric vibrator to make it along direction of rotation flexural deformation with the variation that is subject to force direction in the axle rotation process, the method is simple in structure, but only be suitable for low speed, at a high speed, especially can't produce double-deformation and rotary state cataclysm alternately during even high speed rotating because centrifugal force is excessive and will make piezoelectric vibrator damage because stressed/deformed is excessive; 2. dial type, the piezoelectric vibrator that utilization is stirred fixing piezoelectric vibrator or utilized fixing moving tooth to stir rotation with the rotating mechanism of moving tooth makes its distortion along direction of rotation, the method needs the two to relatively rotate, and is unsuitable for automobile tire, when independently cantilever main shaft etc. is without the occasion of fixed support and high speed, impact/noise is larger; 3. impacting type, utilize the steel ball that rotation is fallen to clash into piezoelectric vibrator, and the method also is only applicable to the occasion that rotating speed is lower, and have larger contact impact and noise, also can make piezoelectric vibrator damage because of contact impact.
The common feature of the rotary piezoelectric generator of above-mentioned existing 3 class is that piezoelectric vibrator all is out of shape along the direction of rotation of rotary body, its deflection and energy output depend on rotating speed and the rotary state of rotary body fully, the drawback brought thus is: 1. the piezoelectric vibrator deflection is uncontrollable, excessive distortion can cause piezoelectric vibrator cracked, therefore reliability is low; 2. at a high speed, at the uniform velocity, especially even-during high speed, piezoelectric vibrator can effectively not encouraged, adaptive capacity to environment and frequency bandwidth are limited.Obviously, the above-mentioned method along rotary body direction of rotation excitation (circumferential excitation) piezoelectric vibrator generating has become the technical bottleneck of its practical application of restriction, and existing rotary piezoelectric generator is not suitable for helicopter screw propeller, automobile tire, aero-engine/bullet train/oil gas brill contour rotating speed of main shaft or limited occasion of usage space/structure.Therefore, simple in structure, reliability is high, bandwidth, without impact/noise and be applicable at the uniform velocity/at a high speed, the New Rotary piezoelectric generator of especially even-high speed rotating is still that a lot of fields are badly in need of.
Summary of the invention
For the self-powered demands status of all kinds of rotating member health monitoring systems, existing rotary piezoelectric generator in existing drawbacks in aspect such as reliability and rotating speed adaptive capacitys; the utility model proposes a kind of cantilever beam piezoelectric vibrators rotary piezoelectric generator that axially flexural vibrations are also generated electricity under the position-arresting disk protection that makes, be called for short the beam type rotary piezoelectric generator based on the position-arresting disk protection.
The embodiment that the utility model adopts is: be inlaid with bearing on the sidewall of frame, described frame side wall is equipped with the first fixed magnet; The casing end of frame is arranged on end cap by screw, and the second fixed magnet is installed on described end cap; One end of rotating shaft is arranged on described frame by bearing, position-arresting disk, cantilever beam piezoelectric vibrators and back-up ring are installed on the spline of described rotating shaft, described position-arresting disk and rotating shaft are by spline joint, and described cantilever beam piezoelectric vibrators and back-up ring are arranged on the spline of described rotating shaft by screw; Described cantilever beam piezoelectric vibrators is by metal substrate and piezoelectric chip is bonding forms; Described cantilever beam piezoelectric vibrators free end one side is with together with spacing preiection on the position-arresting disk sidewall is crimped on; First, second moving magnet is fixed by screws in the free-ended side of described cantilever beam piezoelectric vibrators, described the first moving magnet be positioned at frame side wall on relative installation of like pole of the first fixed magnet; Described the second moving magnet be positioned at end cap on relative installation of like pole of the second fixed magnet; The quantity of described first, second fixed magnet equates.
In the utility model, the first fixed magnet and the second fixed magnet effect are that first, second moving magnet to rotating with rotating shaft produces thrust alternately, thereby make cantilever beam piezoelectric vibrators produce the flexural vibrations axial along rotating shaft, and convert mechanical energy to electric energy.
In the situation that rotating shaft rotates continuously, be arranged on frame relative static with first, second fixed magnet on the end cap sidewall, and the first moving magnet and the second moving magnet that are installed on described piezoelectric vibrator relatively rotate.When the first moving magnet rotated and the first fixed magnet are close, produce repulsive force between the magnetic pole of two same sexes, and making the piezoelectric vibrator on rotating shaft crooked along the axis direction of rotating shaft to the right, the projection on the position-arresting disk of rotating shaft is to cantilever beam piezoelectric vibrators contact support simultaneously; In like manner, when the second moving magnet rotated and the second fixed magnet are close, produce repulsive force between two like poles, and make the piezoelectric vibrator on rotating shaft crooked along the axis direction of rotating shaft left, the projection on the position-arresting disk of rotating shaft is to cantilever beam piezoelectric vibrators contact support.Along with the continuous rotation of rotating shaft, the both sides piezoelectric vibrator produces continuous axial reciprocating flexural vibrations under the promotion of repulsive force, and converts mechanical energy to electric energy.
Characteristic of the present utility model is: the projection be installed on the position-arresting disk on rotating shaft contacts and supports cantilever beam piezoelectric vibrators, free-ended distortion can be supported and is transitioned into stiff end by contact, make cantilever beam piezoelectric vibrators produce more large deformation, improve energy output, and avoided cantilever beam piezoelectric vibrators due to excessive damage of distortion by position-limiting action; Adopt like pole between moving magnet and fixed magnet near the time repulsive force excitation piezoelectric vibrator axial deformation that produces, can be because inhaling and contact mutually between moving-fixed magnet, thus improve the reliability of piezoelectric vibrator; Bending deformation quantity and the energy output of piezoelectric vibrator are mainly determined by the magnetic field intensity between magnetic pole simultaneously, the state variation such as rotating shaft speedup, deceleration and rotating speed height are on the directly impact of its nothing, therefore adaptable to rotating speed, stronger generating capacity is arranged under various rotary states.
The utility model advantage is: 1. by position-arresting disk, cantilever beam piezoelectric vibrators is contacted and supports, make the cantilever beam piezoelectric vibrators stiff end produce more large deformation, improved energy output, and avoided cantilever beam piezoelectric vibrators due to excessive damage of distortion by position-limiting action; 2. piezoelectric vibrator is realized the noncontact excitation by magnetic couple, the piezoelectric vibrator damage that contactless impact, noise and contact excitation may cause; 3. piezoelectric vibrator is along the axial bending distortion of rotating shaft, and deflection and energy output are not affected by the rotating shaft rotary state, while at the uniform velocity reaching high speed, all can generate electricity.
The accompanying drawing explanation
Fig. 1 is the structural principle sketch of generator in preferred embodiment of the utility model;
Fig. 2 is the partial enlarged drawing of I in Fig. 1;
Fig. 3 is the A-A profile of Fig. 1.
Embodiment
The embodiment that the utility model adopts is: be inlaid with bearing 2 on the sidewall of frame 1, the sidewall of described frame 1 is equipped with the first fixed magnet 5; Casing 102 ends of frame 1 are arranged on end cap 9 by screw, on described end cap 9, the second fixed magnet 5 ' are installed; One end of rotating shaft 3 is arranged on described frame 1 by bearing 2; Position-arresting disk 4, cantilever beam piezoelectric vibrators 7 and back-up ring 8 are installed on the spline 301 of described rotating shaft 3, described position-arresting disk 4 is connected by spline 301 with rotating shaft 3, and described cantilever beam piezoelectric vibrators 7 and back-up ring 8 are arranged on the spline 301 of described rotating shaft 3 by screw; Described cantilever beam piezoelectric vibrators 7 is by metal substrate 701 and piezoelectric chip 702 is bonding forms; Described cantilever beam piezoelectric vibrators 7 free end one sides are with together with spacing preiection 401 on position-arresting disk 4 sidewalls is crimped on; First, second moving magnet 6 and 6 ' is fixed by screws in described cantilever beam piezoelectric vibrators 7 ' and 7 free-ended sides, described the first moving magnet 6 be positioned at frame 1 sidewall on relative installation of like pole of the first fixed magnet 5; Described the second moving magnet 6 ' be positioned at end cap 9 on relative installation of like pole of the second fixed magnet 5 '; Described first, second fixed magnet 5 and 5 ' quantity equate.
In the utility model, the first fixed magnet 5 and the second fixed magnet 5 ' effect are that first, second moving magnet 6 and 6 ' to rotating with rotating shaft 3 produces thrust alternately, thereby make cantilever beam piezoelectric vibrators 7 ' and 7 produce the flexural vibrations axial along rotating shaft 3, and convert mechanical energy to electric energy.
In the situation that rotating shaft 3 rotates continuously, be arranged on frame 1 relative with 5 ' static with first, second fixed magnet 5 on end cap 9 sidewalls, and be installed on described piezoelectric vibrator 7 ' and 7 the first moving magnet 6 and the second moving magnet 6 ', relatively rotate.When the first moving magnet 6 rotated with the first fixed magnet 5 when close, produce repulsive force between the magnetic pole of two same sexes, and making the piezoelectric vibrator 7 ' on rotating shaft 3 crooked along the axis direction of rotating shaft 3 to the right, the 7 ' contact of the 401 pairs of cantilever beam piezoelectric vibrators of projection on the position-arresting disk 4 of rotating shaft 3 is simultaneously supported; In like manner, when the second moving magnet 6 ' rotated with the second fixed magnet 5 ' when close, produce repulsive force between two like poles, and make the piezoelectric vibrator 7 on rotating shaft 3 crooked along the axis direction of rotating shaft 3 left, 7 contacts of 401 pairs of cantilever beam piezoelectric vibrators of the projection on the position-arresting disk 4 of rotating shaft 3 are supported; Along with the continuous rotation of rotating shaft 3, both sides piezoelectric vibrator 7 and 7 ' produces continuous axial reciprocating flexural vibrations under the promotion of repulsive force, and converts mechanical energy to electric energy.
Claims (1)
1. the beam type rotary piezoelectric generator based on position-arresting disk protection, it is characterized in that: be inlaid with bearing on the sidewall of frame, described frame side wall is equipped with the first fixed magnet; The casing end of frame is arranged on end cap by screw, and the second fixed magnet is installed on described end cap; One end of rotating shaft is arranged on described frame by bearing, position-arresting disk, cantilever beam piezoelectric vibrators and back-up ring are installed on the spline of described rotating shaft, described position-arresting disk and rotating shaft are by spline joint, and described cantilever beam piezoelectric vibrators and back-up ring are arranged on the spline of described rotating shaft by screw; Described cantilever beam piezoelectric vibrators is by metal substrate and piezoelectric chip is bonding forms; Described cantilever beam piezoelectric vibrators free end one side is with together with spacing preiection on the position-arresting disk sidewall is crimped on; First, second moving magnet is fixed by screws in the free-ended side of described cantilever beam piezoelectric vibrators, described the first moving magnet be positioned at frame side wall on relative installation of like pole of the first fixed magnet, described the second moving magnet be positioned at end cap on relative installation of like pole of the second fixed magnet; The quantity of described first, second fixed magnet equates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320406762 CN203352482U (en) | 2013-06-30 | 2013-06-30 | Limiting disc protection-based cantilever beam type rotating piezoelectric generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320406762 CN203352482U (en) | 2013-06-30 | 2013-06-30 | Limiting disc protection-based cantilever beam type rotating piezoelectric generator |
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| CN203352482U true CN203352482U (en) | 2013-12-18 |
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| CN 201320406762 Expired - Fee Related CN203352482U (en) | 2013-06-30 | 2013-06-30 | Limiting disc protection-based cantilever beam type rotating piezoelectric generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359811A (en) * | 2017-08-17 | 2017-11-17 | 浙江师范大学 | A kind of indirect excitation formula fluid piezoelectric harvester |
| CN107395047A (en) * | 2017-08-17 | 2017-11-24 | 浙江师范大学 | A kind of piezoelectric generator of gyromagnet radial direction tension and compression excitation |
-
2013
- 2013-06-30 CN CN 201320406762 patent/CN203352482U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359811A (en) * | 2017-08-17 | 2017-11-17 | 浙江师范大学 | A kind of indirect excitation formula fluid piezoelectric harvester |
| CN107395047A (en) * | 2017-08-17 | 2017-11-24 | 浙江师范大学 | A kind of piezoelectric generator of gyromagnet radial direction tension and compression excitation |
| CN107359811B (en) * | 2017-08-17 | 2023-04-25 | 浙江师范大学 | Indirect excitation type fluid piezoelectric energy harvester |
| CN107395047B (en) * | 2017-08-17 | 2023-05-16 | 浙江师范大学 | Gyromagnetic radial tension-compression excited piezoelectric generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20140630 |
|
| EXPY | Termination of patent right or utility model |