CN202721626U - Rotary disk piezoelectric generator based on magnetic coupling axial excitation - Google Patents
Rotary disk piezoelectric generator based on magnetic coupling axial excitation Download PDFInfo
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- CN202721626U CN202721626U CN 201220443349 CN201220443349U CN202721626U CN 202721626 U CN202721626 U CN 202721626U CN 201220443349 CN201220443349 CN 201220443349 CN 201220443349 U CN201220443349 U CN 201220443349U CN 202721626 U CN202721626 U CN 202721626U
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- 239000000758 substrate Substances 0.000 claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 238000005452 bending Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract description 3
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Abstract
The utility model relates to a rotating disc type piezoelectric generator based on magnetic force coupling axial excitation, belonging to the field of piezoelectric power generation, wherein the a bearing and a magnet 1 are inlaid on a machine tool casing body, a rotating shaft is mounted on the machine tool casing body through the bearing, both sides of the shaft shoulders of the rotating shaft are respectively provided with a rotating disc and a monitoring system, the rotating disc is equipped with a piezoelectric oscillator, the piezoelectric oscillator is formed by a magnetic metal substrate and a piezoelectric wafer through bonding, the piezoelectric oscillator is connected with the monitoring system through a lead, the flange end of a magnetic rack is mounted on the machine tool casing body through screws, a magnet 2 is inlaid on the inner side of the bottom end of the magnet rack, and the different magnetic poles of the magnets 1 and 2 are mounted near the piezoelectric oscillator. The rotating disc type piezoelectric generator based on magnetic force coupling axial excitation has the advantages of arranging the piezoelectric oscillator of the magnetic metal substrate on a shaft, axially exciting the piezoelectric oscillator through magnetic force coupling, being free of contact impact, noise and impact damage, directly providing electricity to the monitoring system rotating with the shaft, enabling the axial bending deformation and power generation amount of the piezoelectric oscillator not to be influenced by rotation state, and being capable of generating electricity in a uniform speed and a high speed.
Description
Technical field
The utility model belongs to piezo-electric generating and self-powered applied technical field, is specifically related to a kind of rotating disc type piezoelectric generator based on the magnetic couple axial excitation, is used for the health status monitoring system power supply of the rotation class A of geometric unitA such as transmission shaft of machine tool and bearing.
Background technology
The research that utilizes the sheet type piezoelectric vibrator to construct the microminiature 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 to propose for the self-powered sensor monitoring that solves the rotary bodies such as helicopter screw propeller and aero-engine, bullet train, oil gas brill, machine tool chief axis at first; In addition, the demand of micro wind turbine generator also is 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 be used for the small and tele-control system that some need to be mutually integrated with generator and rotary body, especially be unsuitable for automobile tire pressure monitoring system etc. without the occasion of relative motion.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 subjected 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, can't produce double-deformation alternately and rotary state cataclysm because centrifugal force is excessive during especially even high speed rotating and will make piezoelectric vibrator because of stressed, the excessive damage of distortion; 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 it along the distortion of direction of rotation, the method needs the two to relatively rotate, and is unsuitable for automobile tire, impacts when independently cantilever main shaft etc. is without the occasion of fixed support and high speed, noise is larger; 3. impacting type, the steel ball bump piezoelectric vibrator that utilizes rotation to fall, the method also is only applicable to the lower occasion of rotating speed, and has larger contact impact and noise, also piezoelectric vibrator is damaged because of contact impact.
The common feature of the rotary piezoelectric generator of above-mentioned existing 3 classes 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 of bringing 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.As seen, existing rotary piezoelectric generator is not suitable for helicopter screw propeller, automobile tire, aero-engine, bullet train, the oil gas brill contour rotating speed of main shaft or the limited occasion of usage space/structure.Therefore, simple in structure, reliability is high, bandwidth, without impacts/noise and be applicable at the uniform velocity, at a high speed, especially spare-the New Rotary piezoelectric generator of high speed rotating still is that a lot of fields are badly in need of.
Summary of the invention
The utility model provides a kind of rotating disc type piezoelectric generator based on the magnetic couple axial excitation, for self-powered demands status of all kinds of rotating member health monitoring systems such as transmission shaft of machine tool and bearings, in order to solve existing rotary piezoelectric generator in existing problems in aspect such as reliability and rotating speed adaptive capacitys.
The technical scheme that the utility model is taked is: be inlaid with bearing and magnet one on the lathe wall box; One end of rotating shaft is installed on the described lathe wall box by bearing, and the both sides of the shaft shoulder of described rotating shaft are separately installed with rotating disk and monitoring system by screw; By screw the magnetic metal substrate is installed on described rotating disk, the bonding piezoelectric chip in described magnetic metal substrate and its surface consists of piezoelectric vibrator jointly, and described piezoelectric vibrator is connected the wire group and connects with monitoring system; The flange end of magnet frame is installed on the described lathe wall box and with described piezoelectric vibrator by screw and covers on inside; Inboard in the bottom of described magnet frame is inlaid with magnet two; The opposite pole of described magnet one and magnet two and piezoelectric vibrator are near installing; Described magnet one equates with the quantity of magnet two and geometric center to the distance of rotating shaft center equates and the line of its geometric center and rotating shaft center between angle be Q=360o/n, wherein n is the quantity sum of magnet one and magnet two.
In the utility model, the effect of the magnet of the magnet one on the lathe wall box and inboard, magnet frame bottom is the magnetic field that the piezoelectric vibrator that rotates with rotating shaft is applied alternation; The magnetic metal substrate that is used for the formation piezoelectric vibrator can be polarized in magnetic field, thereby and produce attraction between close magnet one or the magnet two, and drive the piezoelectric chip generation along the flexural deformation of rotating shaft axis direction, and then convert mechanical energy to electric energy.Piezoelectric vibrator is fixed on the rotating shaft and with it and rotates, and directly the electric energy that generates is directly supplied with the sensing and monitoring system that together rotates with rotating shaft.
When rotating shaft rotated continuously, piezoelectric vibrator rotated with rotating shaft, and the magnet of the magnet one on the lathe wall box and inboard, magnet frame bottom is relatively static.When the piezoelectric vibrator that rotates was extremely close with the N of described magnet one, surface adjacent with described magnet one on the magnetic metal substrate of described piezoelectric vibrator was polarized into the S utmost point, another surface is polarized into the N utmost point; In like manner, when the piezoelectric vibrator that rotates was close with the S of described magnet two, surface adjacent with described magnet two on the magnetic metal substrate of described piezoelectric vibrator was polarized into the N utmost point, another surface is polarized into the S utmost point.Piezoelectric vibrator and magnet one and magnet two in rotation replace in the close process, pole orientation after its magnetic metal substrate is polarized does not change, and the S with magnet two is extremely relative all the time for the N utmost point of formation after all the time, the magnetization extremely relative with the N of magnet one of the S utmost point that namely forms after the magnetization.Therefore, when piezoelectric vibrator and magnet one near the time, two opposite poles are inhaled mutually, and piezoelectric vibrator is produced along the flexural deformation left of rotating shaft axis direction; When piezoelectric vibrator and magnet two near the time, two opposite poles are inhaled mutually, and piezoelectric vibrator is produced along the flexural deformation to the right of rotating shaft axis direction.Along with the continuous rotation of rotating shaft, piezoelectric vibrator will produce continuous axial reciprocating flexural vibrations under two rightabout magnetic attraction, and convert mechanical energy to electric energy.
Characteristic of the present utility model is: the attraction excitation piezoelectric vibrator axial bending distortion that produces after utilizing sheet type magnetic metal substrate piezoelectric vibrator to be magnetized in magnetic field, need not additional configuration magnet on the piezoelectric vibrator, the generating element axial dimension is short, simple in structure, reliability is high; The bending deformation quantity of piezoelectric vibrator and energy output are mainly determined by the magnetic field intensity of magnet, rotating shaft speedup, deceleration, and the state variation such as rotating speed height on it without directly affecting, therefore adaptable to rotating speed, stronger generating capacity is arranged under various rotary states.
The utility model advantage is: 1. piezoelectric vibrator places on the rotating shaft, realize the noncontact excitation by magnetic couple, the piezoelectric vibrator damage that contactless impact, noise and contact excitation may cause, and be convenient to electric energy is offered the monitoring system of rotating with rotating shaft; 2. 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, all can generate electricity when at the uniform velocity reaching high speed.
Description of drawings
Fig. 1 is the structure diagrammatic cross-sectional view of generator in preferred embodiment of the utility model;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is the I section enlarged drawing of Fig. 1
Fig. 4 is the structural representation of the utility model piezoelectric vibrator;
Fig. 5 is the B-B profile of Fig. 4.
Embodiment
Be inlaid with bearing 2 and magnet 1 on the lathe wall box 1; One end 301 of rotating shaft 3 is installed on the described lathe wall box 1 by bearing 2, and the both sides of the shaft shoulder 302 of described rotating shaft 3 are separately installed with rotating disk 5 and monitoring system 7 by screw; On described rotating disk 5, by screw magnetic metal substrate 601 is installed, the piezoelectric chip 602 common formation piezoelectric vibrators 6 that described magnetic metal substrate 601 is bonding with its surface, described piezoelectric vibrator 6 is connected with monitoring system by 9 connections of wire group; The flange end 801 of magnet frame 8 is installed on the described lathe wall box 1 and with described piezoelectric vibrator 6 by screw and covers on inside; Inboard in the bottom 802 of described magnet frame 8 is inlaid with magnet 24 '; Described magnet 1 and magnet 24 ' opposite pole and piezoelectric vibrator 6 near installations; Described magnet 1 and magnet 24 ' quantity equate and geometric center to the distance at the center of rotating shaft 3 equates and the line at the center of its geometric center and rotating shaft 3 between angle be Q=360o/n, wherein n is magnet 1 and magnet 24 ' the quantity sum.
In the utility model, the effect of the magnet 4 ' of 802 inboards, bottom of the magnet 1 on the lathe wall box 1 and magnet frame 8 is the magnetic field that the piezoelectric vibrator 6 that rotates with rotating shaft 3 is applied alternation; The magnetic metal substrate 601 that is used for formation piezoelectric vibrator 6 can be polarized in magnetic field, thereby and close magnet 1 or magnet 24 ' between produce attraction, and drive the flexural deformation that piezoelectric chip 602 produces along the rotating shaft axis direction, and then convert mechanical energy to electric energy.Piezoelectric vibrator 6 is fixed on the rotating shaft 3 and with it and rotates, and directly the electric energy that generates is directly supplied with the sensing and monitoring system 7 that together rotates with rotating shaft 3.
When rotating shaft 3 rotated continuously, piezoelectric vibrator 6 rotated with rotating shaft 3, and the magnet 4 ' of 802 inboards, bottom of the magnet 1 on the lathe wall box 1 and magnet frame 8 is relative static.When the N of magnet 1 on the piezoelectric vibrator 6 that rotates and the lathe wall box 1 extremely near the time, surface adjacent with described magnet 1 on the magnetic metal substrate 601 of described piezoelectric vibrator 6 is polarized into the S utmost point, another surface is polarized into the N utmost point; In like manner, when the magnet two 4 of the piezoelectric vibrator 6 that rotates with 802 inboards, bottom of magnet frame 8 ' S near the time, on the magnetic metal substrate 601 of described piezoelectric vibrator 6 with described magnet 24 ' adjacent surface is polarized into the N utmost point, another surface is polarized into the S utmost point.As seen, piezoelectric vibrator 6 and magnet 1 and magnet 24 in rotation ' replace in the close process, pole orientation after its magnetic metal substrate 601 is polarized does not change, after all the time, the magnetization extremely relative with the N of magnet 1 of the S utmost point that namely forms after the magnetization N utmost point of formation all the time with magnet 24 ' S extremely relative.Therefore, when piezoelectric vibrator 6 and magnet 1 near the time, two opposite poles are inhaled mutually, the axis direction flexural deformation left that piezoelectric vibrator 6 is produced along rotating shaft 3; When piezoelectric vibrator 6 and magnet 24 ' near the time, two opposite poles are inhaled mutually, the axis direction flexural deformation to the right that piezoelectric vibrator 6 is produced along rotating shaft 3.Along with the continuous rotation of rotating shaft 3, piezoelectric vibrator 6 will produce continuous axial reciprocating flexural vibrations under two rightabout magneticactions, and convert mechanical energy to electric energy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220443349 CN202721626U (en) | 2012-09-01 | 2012-09-01 | Rotary disk piezoelectric generator based on magnetic coupling axial excitation |
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| CN 201220443349 CN202721626U (en) | 2012-09-01 | 2012-09-01 | Rotary disk piezoelectric generator based on magnetic coupling axial excitation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801356A (en) * | 2012-09-01 | 2012-11-28 | 浙江师范大学 | Magnetic force coupling axial excitation-based rotary disk type piezoelectric generator |
| CN106026775A (en) * | 2016-07-13 | 2016-10-12 | 东南大学 | Rotating-type piezoelectric disc energy harvester and energy harvesting method thereof |
| CN106411176A (en) * | 2016-06-15 | 2017-02-15 | 浙江师范大学 | Rotary wheel self-exciting circle piezoelectric vibrator generator |
| CN106452175A (en) * | 2016-06-15 | 2017-02-22 | 浙江师范大学 | Circular piezoelectric vibrator generator for wind power gear box monitoring system power supply |
| CN109756153A (en) * | 2019-01-30 | 2019-05-14 | 浙江师范大学 | A Magnetically Coupled Non-Resonant Rotary Piezoelectric Generator |
-
2012
- 2012-09-01 CN CN 201220443349 patent/CN202721626U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801356A (en) * | 2012-09-01 | 2012-11-28 | 浙江师范大学 | Magnetic force coupling axial excitation-based rotary disk type piezoelectric generator |
| CN102801356B (en) * | 2012-09-01 | 2015-04-01 | 浙江师范大学 | Magnetic force coupling axial excitation-based rotary disk type piezoelectric generator |
| CN106411176A (en) * | 2016-06-15 | 2017-02-15 | 浙江师范大学 | Rotary wheel self-exciting circle piezoelectric vibrator generator |
| CN106452175A (en) * | 2016-06-15 | 2017-02-22 | 浙江师范大学 | Circular piezoelectric vibrator generator for wind power gear box monitoring system power supply |
| CN106411176B (en) * | 2016-06-15 | 2018-04-03 | 浙江师范大学 | A kind of runner auto-excitation type circular piezoelectric vibrator generator |
| CN106026775A (en) * | 2016-07-13 | 2016-10-12 | 东南大学 | Rotating-type piezoelectric disc energy harvester and energy harvesting method thereof |
| CN109756153A (en) * | 2019-01-30 | 2019-05-14 | 浙江师范大学 | A Magnetically Coupled Non-Resonant Rotary Piezoelectric Generator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130206 Effective date of abandoning: 20150401 |
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| RGAV | Abandon patent right to avoid regrant |