CN102801356B - Magnetic force coupling axial excitation-based rotary disk type piezoelectric generator - Google Patents
Magnetic force coupling axial excitation-based rotary disk type piezoelectric generator Download PDFInfo
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- CN102801356B CN102801356B CN201210318782.4A CN201210318782A CN102801356B CN 102801356 B CN102801356 B CN 102801356B CN 201210318782 A CN201210318782 A CN 201210318782A CN 102801356 B CN102801356 B CN 102801356B
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- 239000002184 metal Substances 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 3
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Abstract
The invention relates to a magnetic force coupling axial excitation-based rotary disk type piezoelectric generator which belongs to the field of piezoelectric power generator. A bearing and a magnet I are embedded on a lathe box body, a rotating shaft is arranged on the lathe box body through the bearing, two sides of a shaft shoulder of the rotating shaft are respectively provided with a rotating disk and a monitoring system, a piezoelectric vibrator is arranged on the rotating disk and is formed by adhering a magnetic metal substrate and a piezoelectric wafer, the piezoelectric vibrator is connected with the monitoring system through a lead group, the flange end of a magnet frame is arranged on the lathe box body through a screw, a magnet II is embedded on the inner side of the bottom end of the magnet frame, and different magnetic poles of the magnet I and the magnet II are installed close to the piezoelectric vibrator. The invention has the advantages that the piezoelectric vibrator of the magnetic metal substrate is placed on the shaft and is coupled and axially excited through a magnetic force without contact impaction, noise and impact damage, electric energy is directly supplied to the monitoring system rotating with the shaft' and the piezoelectric vibrator is axially bent and deformed and the power generation quantity is not influenced by the rotating state, and power can be generated at constant speed and high speed.
Description
Technical field
The invention belongs to piezo-electric generating and self-powered applied technical field, be specifically related to a kind of rotating disc type piezoelectric generator based on magnetic couple axial excitation, rotate the health status monitoring system power supply of class A of geometric unitA for transmission shaft of machine tool and bearing etc.
Background technology
The research utilizing sheet type piezoelectric vibrator to construct microminiature piezoelectric generator has become the focus of domestic and international lasting for years.For generator prime power source and the difference of application purpose, cantilever beam type piezoelectric generator, main involving vibrations formula and the rotary two large types of various structures form are all proposed at present both at home and abroad.Wherein, rotary piezoelectric generator is self-powered sensor monitoring for solving the rotary body such as helicopter screw propeller and aero-engine, bullet train, oil gas brill, machine tool chief axis at first and proposes; In addition, the demand of micro wind turbine generator is also expedite the emergence of the key element of rotary piezoelectric generator.With regard to generating, power supply capacity, rotary electric magnetic generator is very ripe and be widely used, but because of its need mover and stator to do relative motion and dynamic/stator dimensions is suitable, therefore complex structure, volume are large, cannot or inconvenience be used for some and need small and tele-control system mutually integrated to generator and rotary body, be especially unsuitable for the occasion without relative motion such as automobile tire pressure monitoring system.By comparison, sheet type piezoelectric vibrator because structure is simple, volume is little and can be integrated with rotary body, therefore is considered to the effective ways constructing microminiature rotary generator.
According to the difference of energisation mode, existing rotary piezoelectric generator can be divided into 3 large classes: 1. inertia-powered formula, piezoelectric vibrator is utilized to make it along direction of rotation flexural deformation with the change of Impact direction in axle rotation process, the method structure is simple, but be only suitable for low speed, at a high speed, especially even high speed rotating time cannot to produce double-deformation alternately because centrifugal force is excessive and rotary state cataclysm will make piezoelectric vibrator because of stressed, be out of shape excessive and damage; 2. dial type, utilize and stir fixing piezoelectric vibrator with the rotating mechanism of moving tooth or the piezoelectric vibrator that utilizes fixing moving tooth to stir rotation makes it along the distortion of direction of rotation, the method relatively rotates both needing, be unsuitable for automobile tire, independently cantilever main shaft etc. without the occasion of fixed support and high speed time impact, noise larger; 3. impacting type, utilize rotational fall steel ball clash into piezoelectric vibrator, the method is also only applicable to the lower occasion of rotating speed, and exist larger contact impact and noise, also piezoelectric vibrator can be made to damage because of contact impact.
The common feature of above-mentioned existing 3 class rotary piezoelectric generator is that piezoelectric vibrator is all 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 completely, drawback brought thus is: 1. 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-high speed time, piezoelectric vibrator can not effectively be encouraged, adaptive capacity to environment and frequency bandwidth limited.Visible, existing rotary piezoelectric generator is not suitable for the occasion of helicopter screw propeller, automobile tire, aero-engine, bullet train, the oil gas brill contour rotating speed of main shaft or usage space/structure constraint.Therefore, structure is simple, reliability is high, bandwidth, be applicable at the uniform velocity, at a high speed, the New Rotary piezoelectric generator of especially even-high speed rotating is still badly in need of in a lot of field without impact/noise.
Summary of the invention
The invention provides a kind of rotating disc type piezoelectric generator based on magnetic couple axial excitation, for the self-powered demands status of all kinds of rotating member such as transmission shaft of machine tool and bearing health monitoring systems, in order to solve existing rotary piezoelectric generator in reliability and rotating speed adaptive capacity etc. existing for problem.
The technical scheme that the present invention takes is: Machine tool box body sidewall is inlaid with bearing and magnet one; One end of rotating shaft is arranged on described Machine tool box body sidewall 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; Described rotating disk is provided with magnetic metal substrate by screw, and the described magnetic metal substrate piezoelectric chip bonding with its surface forms piezoelectric vibrator jointly, and described piezoelectric vibrator is connected by wire group with monitoring system; The flange end of magnet frame to be arranged on described Machine tool box body sidewall by screw and described piezoelectric vibrator is covered on inside; Magnet two is had at the innermost insert of the bottom of described magnet frame; The opposite pole of described magnet one and magnet two and piezoelectric vibrator are near installing; Described magnet one and geometric center equal with the quantity of magnet two is to the distance of rotating shaft center is equal and angle between its geometric center and line of rotating shaft center is Q=360o/n, and wherein n is the quantity sum of magnet one and magnet two.
In the present invention, the effect of the magnet one on Machine tool box body sidewall and the magnet inside magnet frame bottom is the magnetic field piezoelectric vibrator rotated with rotating shaft being applied to alternation; Magnetic metal substrate for forming piezoelectric vibrator can be polarized in magnetic field, thus and produce attraction between close magnet one or magnet two, and drive piezoelectric chip to produce flexural deformation along rotating shaft axis direction, and then convert mechanical energy to electric energy.Piezoelectric vibrator is fixed on the rotary shaft and is rotated with it, directly generated electric energy is directly supplied the sensing and monitoring system together rotated with rotating shaft.
When rotating shaft rotates continuously, piezoelectric vibrator rotates with rotating shaft, and the magnet one on Machine tool box body sidewall and the magnet geo-stationary inside magnet frame bottom.When rotate piezoelectric vibrator and described magnet one N extremely near time, surface adjacent with described magnet one on the magnetic metal substrate of described piezoelectric vibrator is polarized into S pole, another surface and is polarized into N pole; In like manner, when rotate piezoelectric vibrator and described magnet two S near time, surface adjacent with described magnet two on the magnetic metal substrate of described piezoelectric vibrator is polarized into N pole, another surface and is polarized into S pole.Replace in close process at the piezoelectric vibrator and the magnet one that rotate and magnet two, pole orientation after its magnetic metal substrate is polarized does not change, the S pole namely formed after magnetization all the time extremely relative with the N of magnet one, to magnetize the N pole formed afterwards extremely relative with the S of magnet two all the time.Therefore, when piezoelectric vibrator and magnet one near time, two opposite poles are attracting, make piezoelectric vibrator produce along rotating shaft axis direction flexural deformation left; When piezoelectric vibrator and magnet two near time, two opposite poles are attracting, make piezoelectric vibrator produce along rotating shaft axis direction flexural deformation to the right.Along with the continuous rotation of rotating shaft, piezoelectric vibrator will produce the flexural vibrations of continuous print axial reciprocating under two rightabout magnetic attraction, and convert mechanical energy to electric energy.
Characteristic of the present invention is: the attraction excitation piezoelectric vibrator axial bending distortion produced after utilizing sheet type magnetic metal substrate piezoelectric vibrator to be magnetized in magnetic field, without the need to additional configuration magnet on piezoelectric vibrator, generating element axial dimension is short, structure is simple, reliability is high; The bending deformation quantity of piezoelectric vibrator and energy output determine primarily of the magnetic field intensity of magnet, the state variation such as rotating shaft speedup, deceleration and rotating speed height directly affect its nothing, therefore adaptable to rotating speed, under various rotary state, there is stronger generating capacity.
Advantage of the present invention is: 1. piezoelectric vibrator is placed on rotating shaft, realizes noncontact excitation by magnetic couple, and contactless impact, noise and contact encourage the piezoelectric vibrator damage that may cause, and are convenient to electric energy is supplied to the monitoring system of rotating with rotating shaft; 2. piezoelectric vibrator is out of shape along the axial bending of rotating shaft, and deflection and energy output do not affect by rotating shaft rotary state, at the uniform velocity and high speed time all can generate electricity.
Accompanying drawing explanation
Fig. 1 is the structure diagrammatic cross-sectional view of generator in a preferred embodiment of the present invention;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is the I portion enlarged drawing of Fig. 1
Fig. 4 is the structural representation of piezoelectric vibrator of the present invention;
Fig. 5 is the B-B profile of Fig. 4.
Embodiment
Machine tool box body sidewall 1 is inlaid with bearing 2 and magnet 1; One end 301 of rotating shaft 3 is arranged on described Machine tool box body sidewall 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; Described rotating disk 5 is provided with magnetic metal substrate 601 by screw, and described magnetic metal substrate 601 piezoelectric chip 602 bonding with its surface forms piezoelectric vibrator 6 jointly, and described piezoelectric vibrator 6 is connected by wire group 9 with monitoring system 7; The flange end 801 of magnet frame 8 to be arranged on described Machine tool box body sidewall 1 by screw and described piezoelectric vibrator 6 is covered on inside; Magnet 24 is had ' at the innermost insert of the bottom 802 of described magnet frame 8; Described magnet 1 and magnet 24 ' opposite pole install with piezoelectric vibrator 6 is close; The quantity sum of described magnet 1 and magnet 24 ' the equal and geometric center of quantity to the distance at the center of rotating shaft 3 is equal and angle between the line at the center of its geometric center and rotating shaft 3 is Q=360o/n, wherein n is magnet 1 and magnet 24 '.
In the present invention, the effect of the magnet 4 ' inside the magnet 1 on Machine tool box body sidewall 1 and the bottom 802 of magnet frame 8 is the magnetic field piezoelectric vibrator 6 rotated with rotating shaft 3 being applied to alternation; Magnetic metal substrate 601 for forming piezoelectric vibrator 6 can be polarized in magnetic field, thus and close magnet 1 or magnet 24 ' between produce attraction, and drive piezoelectric chip 602 to produce flexural deformation along rotating shaft axis direction, and then convert mechanical energy to electric energy.Piezoelectric vibrator 6 to be fixed on rotating shaft 3 and to rotate with it, directly generated electric energy is directly supplied the sensing and monitoring system 7 together rotated with rotating shaft 3.
When rotating shaft 3 rotates continuously, piezoelectric vibrator 6 rotates with rotating shaft 3, and the magnet 4 ' geo-stationary inside the bottom 802 of magnet 1 on Machine tool box body sidewall 1 and magnet frame 8.When magnet 1 on the piezoelectric vibrator 6 rotated with Machine tool box body sidewall 1 N extremely near time, surface adjacent with described magnet 1 on the magnetic metal substrate 601 of described piezoelectric vibrator 6 is polarized into S pole, another surface and is polarized into N pole; In like manner, the magnet 24 inside the piezoelectric vibrator 6 rotated with the bottom 802 of magnet frame 8 ' S near time, with described magnet 24 on the magnetic metal substrate 601 of described piezoelectric vibrator 6 ' adjacent surface is polarized into N pole, another surface and is polarized into S pole.Visible, at the piezoelectric vibrator 6 rotated and magnet 1 and magnet 24 ' replace in close process, pole orientation after its magnetic metal substrate 601 is polarized does not change, the S pole namely formed after magnetization all the time extremely relative with the N of magnet 1, magnetize the N pole that formed afterwards all the time with magnet 24 ' S extremely relative.Therefore, when piezoelectric vibrator 6 and magnet 1 near time, two opposite poles are attracting, make piezoelectric vibrator 6 produce axis direction flexural deformation left along rotating shaft 3; When piezoelectric vibrator 6 and magnet 24 ' near time, two opposite poles are attracting, make piezoelectric vibrator 6 produce axis direction flexural deformation to the right along rotating shaft 3.Along with the continuous rotation of rotating shaft 3, piezoelectric vibrator 6 will produce the flexural vibrations of continuous print axial reciprocating under two rightabout magneticactions, and convert mechanical energy to electric energy.
Claims (1)
1. based on a rotating disc type piezoelectric generator for magnetic couple axial excitation, it is characterized in that: Machine tool box body sidewall is inlaid with bearing and magnet one; One end of rotating shaft is arranged on described Machine tool box body sidewall 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; Described rotating disk is provided with magnetic metal substrate by screw, and the described magnetic metal substrate piezoelectric chip bonding with its surface forms piezoelectric vibrator jointly, and described piezoelectric vibrator is connected by wire group with monitoring system; The flange end of magnet frame to be arranged on described Machine tool box body sidewall by screw and described piezoelectric vibrator is covered on inside; Magnet two is had at the innermost insert of the bottom of described magnet frame; The opposite pole of described magnet one and magnet two and piezoelectric vibrator are near installing; Described magnet one and geometric center equal with the quantity of magnet two is to the distance of rotating shaft center is equal and angle between its geometric center and line of rotating shaft center is Q=360o/n, and wherein n is the quantity sum of magnet one and magnet two.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210318782.4A CN102801356B (en) | 2012-09-01 | 2012-09-01 | Magnetic force coupling axial excitation-based rotary disk type piezoelectric generator |
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| CN201210318782.4A CN102801356B (en) | 2012-09-01 | 2012-09-01 | Magnetic force coupling axial excitation-based rotary disk type piezoelectric generator |
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| CN102801356A CN102801356A (en) | 2012-11-28 |
| CN102801356B true CN102801356B (en) | 2015-04-01 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103259452B (en) * | 2013-05-31 | 2015-06-10 | 浙江师范大学 | Shaft-end overhung piezoelectric cantilever beam electric generator |
| CN103973161A (en) * | 2014-04-25 | 2014-08-06 | 天津大学 | Rotation piezoelectric energy collecting device |
| CN105846642B (en) * | 2016-04-19 | 2019-05-10 | 中北大学 | Magnet array Plane Rotation formula energy collecting device |
| CN106014887B (en) * | 2016-06-15 | 2018-07-03 | 浙江师范大学 | A kind of suspension self-excitation runner piezoelectric beam energy accumulator |
| CN107332463B (en) * | 2017-08-17 | 2023-05-26 | 浙江师范大学 | Novel generator for train bearing monitoring system |
| CN107395051B (en) * | 2017-08-17 | 2023-05-16 | 浙江师范大学 | Generator for railway train bearing monitoring system |
| CN107482868B (en) * | 2017-08-17 | 2023-05-26 | 浙江师范大学 | Magnetic coupling step-by-step excitation water flow generator |
| CN107359815B (en) * | 2017-08-17 | 2023-05-16 | 浙江师范大学 | Radial tension-compression excited rotary piezoelectric generator |
| CN109756152B (en) * | 2019-01-30 | 2020-04-17 | 浙江师范大学 | Frequency conversion type gyromagnetic excitation piezoelectric generator |
| CN109831119B (en) * | 2019-01-30 | 2020-04-21 | 浙江师范大学 | Magnetic excitation rotary piezoelectric generator |
| CN113437899B (en) * | 2021-07-05 | 2023-01-31 | 浙江师范大学 | Follow-up rotating body monitoring device |
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|---|---|---|---|---|
| CN201365182Y (en) * | 2009-03-06 | 2009-12-16 | 屠照友 | Permanent magnet three-phase disc type generator |
| CN102292908A (en) * | 2008-12-17 | 2011-12-21 | 发现技术国际股份有限公司 | Piezoelectric motor with high torque |
| CN202721626U (en) * | 2012-09-01 | 2013-02-06 | 浙江师范大学 | Rotating disc type piezoelectric generator based on magnetic force coupling axial excitation |
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2012
- 2012-09-01 CN CN201210318782.4A patent/CN102801356B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102292908A (en) * | 2008-12-17 | 2011-12-21 | 发现技术国际股份有限公司 | Piezoelectric motor with high torque |
| CN201365182Y (en) * | 2009-03-06 | 2009-12-16 | 屠照友 | Permanent magnet three-phase disc type generator |
| CN202721626U (en) * | 2012-09-01 | 2013-02-06 | 浙江师范大学 | Rotating disc type piezoelectric generator based on magnetic force coupling axial excitation |
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Owner name: ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID JILI Effective date: 20141219 |
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Inventor after: Zeng Ping Inventor after: Zhang Xiaoyi Inventor after: Han Junwu Inventor after: Wang Shuyun Inventor after: Wen Jianming Inventor after: Yan Mengjia Inventor after: Wang Chunling Inventor after: Wang Songhan Inventor before: Wang Shuyun Inventor before: Han Junwu Inventor before: Wan Jie Inventor before: Zeng Ping Inventor before: Wen Jianming Inventor before: An Zhiqi |
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Free format text: CORRECT: INVENTOR; FROM: WANG SHUYUN KAN JUNWU WAN JIE CENG PING WEN JIANMING AN ZHIQI TO: CENG PING ZHANG XIAOYI KAN JUNWU WANG SHUYUN WEN JIANMING YAN MENGJIA WANG CHUNLING WANG SONGHAN |
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Effective date of registration: 20141219 Address after: 321001 Zhejiang province Jinhua City Yingbin Road No. 688 Applicant after: Zhejiang Normal University Applicant after: Electric Power Research Institute, State Grid Jilin Power Co., Ltd. Applicant after: State Grid Corporation of China Address before: 321001 Zhejiang province Jinhua City Yingbin Road No. 688 Applicant before: Zhejiang Normal University |
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