CN102801356A - 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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- CN102801356A CN102801356A CN2012103187824A CN201210318782A CN102801356A CN 102801356 A CN102801356 A CN 102801356A CN 2012103187824 A CN2012103187824 A CN 2012103187824A CN 201210318782 A CN201210318782 A CN 201210318782A CN 102801356 A CN102801356 A CN 102801356A
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- 230000008878 coupling Effects 0.000 title claims abstract description 7
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- 238000005859 coupling reaction Methods 0.000 title claims abstract description 7
- 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
- 238000009434 installation Methods 0.000 claims description 5
- 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 5
- 230000005415 magnetization Effects 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
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- 229910000831 Steel Inorganic materials 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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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, be used for the health status monitoring system power supply of rotation class A of geometric unitA such as lathe power transmission shaft and bearing based on magnetic force coupling axial excitation.
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.To the difference of generator prime power source and application purpose, the beam type piezoelectric generator of multiple version has all been proposed at present, main involving vibrations formula and rotary two major types both at home and abroad.Wherein, rotary piezoelectric generator is to propose for the self-powered sensor monitoring that solves 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, it does that relative motion and moving/stator dimensions is suitable because of needing mover and stator; So complex structure, volume are big, can't or inconvenience be used for the small and tele-control system that some need be mutually integrated with generator and rotary body, especially be inappropriate for the occasion of no relative motions 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, so 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 big types: 1. inertia-powered formula; Utilize piezoelectric vibrator to make it along direction of rotation flexural deformation with the variation that receives force direction in the axle rotation process; This method is simple in structure, but only is suitable for low speed, at a high speed, can't produce double-deformation alternately and rotary state cataclysm because of 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 the rotating mechanism that utilization has a moving tooth is stirred fixing piezoelectric vibrator or utilized fixing moving tooth to stir rotation makes its distortion along direction of rotation; This method needs the two to relatively rotate, and is inappropriate for doughnut, independently impacts during occasion and the high speed of no fixed support such as cantilever main shaft, noise is bigger; 3. impacting type, the steel ball bump piezoelectric vibrator that utilizes rotation to fall, this method also is only applicable to the lower occasion of rotating speed, and has bigger contact impact and noise, also piezoelectric vibrator is damaged because of contact impact.
The common feature of above-mentioned existing 3 types of rotary piezoelectric generators is that piezoelectric vibrator all is out of shape along the direction of rotation of rotary body; Its deflection and energy output depend on the rotating speed and the rotary state of rotary body fully; The drawback of being brought thus is: 1. the piezoelectric vibrator deflection is uncontrollable; Excessive distortion can cause piezoelectric vibrator cracked, so reliability is low; 2. at a high speed, at the uniform velocity, especially even-during high speed, piezoelectric vibrator can be by effective excitation, adaptive capacity to environment and frequency bandwidth are limited.It is thus clear that existing rotary piezoelectric generator is not suitable for high rotating speed or usage space/structure occasions with limited such as helicopter screw propeller, doughnut, aero-engine, bullet train, oil gas brill main shaft.Therefore, simple in structure, reliability is high, bandwidth, nothing impact/noise and be applicable at the uniform velocity, at a high speed, especially the New Rotary piezoelectric generator of even-high speed rotating still is that a lot of field is badly in need of.
Summary of the invention
The present invention provides a kind of rotating disc type piezoelectric generator based on magnetic force coupling axial excitation; To self-powered demands status of all kinds of rotating member health monitoring systems such as lathe power transmission shaft 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 present invention takes is: be inlaid with bearing and magnet one on the lathe wall box; On described lathe wall box, the both sides of the shaft shoulder of said rotating shaft are separately installed with rotating disk and monitoring system through screw to one end of rotating shaft through Bearing Installation; On said rotating disk, the magnetic metal substrate is installed through screw, said magnetic metal substrate and its surface bonding piezoelectric chip constitute piezoelectric vibrator jointly, said piezoelectric vibrator is connected through the lead group with monitoring system; The flange end of magnet frame is installed on the described lathe wall box and with said piezoelectric vibrator through screw and covers on inside; Inboard in the bottom of said magnet frame is inlaid with magnet two; The opposite pole of said magnet one and magnet two and piezoelectric vibrator are near installation; Said magnet one equates with the quantity of magnet two and the distance of geometric center to 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 present invention, the effect of the magnet on the lathe wall box one and the magnet of inboard, magnet frame bottom is that the piezoelectric vibrator that rotates with rotating shaft is applied alternating magnetic fields; The magnetic metal substrate that is used to constitute piezoelectric vibrator can be polarized in magnetic field, thereby and near magnet one or magnet two between produce attraction, and drive piezoelectric chip and produce flexural deformation, and then convert mechanical energy to electric energy along the rotating shaft axis direction.Piezoelectric vibrator is fixed on the rotating shaft and with it and rotates, and directly the electric energy that is generated 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 magnet one on the lathe wall box and inboard, magnet frame bottom is static relatively.When the N utmost point of piezoelectric vibrator that rotates and said magnet one near the time, be polarized into the S utmost point with said magnet one adjacent surface on the magnetic metal substrate of said piezoelectric vibrator, another surface is polarized into the N utmost point; In like manner, when the S of piezoelectric vibrator that rotates and said magnet two near the time, be polarized into the N utmost point with said magnet two adjacent surfaces on the magnetic metal substrate of said piezoelectric vibrator, another surface is polarized into the S utmost point.Piezoelectric vibrator and the magnet one of rotation and magnet two replace near process in; Its magnetic metal substrate is not changed by the pole orientation after polarizing, promptly the S utmost point that forms of magnetization back all the time with the N of magnet one extremely relatively, the S with magnet two is extremely relative all the time for the N utmost point that forms of magnetization back.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 cyclic bending vibration 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 that is produced after utilizing sheet type magnetic metal substrate piezoelectric vibrator in magnetic field, to be magnetized; 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 state variation such as rotating speed height it does not had directly influence; Therefore strong to the rotating speed adaptive capacity, stronger generating capacity is all arranged under various rotary states.
Advantage of the present invention is: 1. piezoelectric vibrator places on the rotating shaft, realizes the noncontact excitation through the magnetic force coupling, the piezoelectric vibrator damage that contactless impact, noise and contact excitation possibly 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 influenced by the rotating shaft rotary state, all can generate electricity when at the uniform velocity reaching high speed.
Description of drawings
Fig. 1 is a generator Structure diagrammatic cross-sectional view in 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
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 through bearing 2, and the both sides of the shaft shoulder 302 of said rotating shaft 3 are separately installed with rotating disk 5 and monitoring system 7 through screw; On said rotating disk 5, magnetic metal substrate 601 is installed through screw, said magnetic metal substrate 601 and its surface bonding piezoelectric chip 602 is common constitutes piezoelectric vibrators 6, said piezoelectric vibrator 6 is connected through lead group 9 with monitoring system 7; The flange end 801 of magnet frame 8 is installed on the said lathe wall box 1 and with said piezoelectric vibrator 6 through screw and covers on inside; Inboard in the bottom 802 of said magnet frame 8 is inlaid with magnet 24 '; Said magnet 1 and magnet 24 ' opposite pole and piezoelectric vibrator 6 near installation; Said magnet 1 and magnet 24 ' quantity equate and the distance at the center of geometric center to 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 present invention, the effect of the magnet 4 ' of 802 inboards, bottom of magnet on the lathe wall box 11 and magnet frame 8 is that the piezoelectric vibrator 6 that rotates with rotating shaft 3 is applied alternating magnetic fields; The magnetic metal substrate 601 that is used to constitute piezoelectric vibrator 6 can be polarized in magnetic field; Thereby and near 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 is generated 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 magnet 1 on the lathe wall box 1 and magnet frame 8 is static relatively.When the N utmost point of magnet 1 on the piezoelectric vibrator that rotates 6 and the lathe wall box 1 near the time, be polarized into the S utmost point with said magnet one 4 adjacent surfaces on the magnetic metal substrate 601 of said piezoelectric vibrator 6, another surface is polarized into the N utmost point; In like manner, when the inboard magnet 24 in the bottom of the piezoelectric vibrator that rotates 6 and magnet frame 8 802 ' S near the time, on the magnetic metal substrate 601 of said piezoelectric vibrator 6 with said magnet 24 ' adjacent surface is polarized into the N utmost point, another surface is polarized into the S utmost point.It is thus clear that; Piezoelectric vibrator 6 and magnet 1 and magnet 24 in rotation ' alternately near process in; The pole orientation of its magnetic metal substrate 601 after by polarization do not change, promptly the S utmost point that forms of magnetization back all the time with the N of magnet 1 extremely relatively, the N utmost point that forms of magnetization back 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 cyclic bending vibration under two rightabout magneticactions, and convert mechanical energy to electric energy.
Claims (1)
1. the rotating disc type piezoelectric generator based on magnetic force coupling axial excitation is characterized in that: be inlaid with bearing and magnet one on the lathe wall box; On described lathe wall box, the both sides of the shaft shoulder of said rotating shaft are separately installed with rotating disk and monitoring system through screw to one end of rotating shaft through Bearing Installation; On said rotating disk, the magnetic metal substrate is installed through screw, said magnetic metal substrate and its surface bonding piezoelectric chip constitute piezoelectric vibrator jointly, said piezoelectric vibrator is connected through the lead group with monitoring system; The flange end of magnet frame is installed on the described lathe wall box and with said piezoelectric vibrator through screw and covers on inside; Inboard in the bottom of said magnet frame is inlaid with magnet two; The opposite pole of said magnet one and magnet two and piezoelectric vibrator are near installation; Said magnet one equates with the quantity of magnet two and the distance of geometric center to 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.
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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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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103259452A (en) * | 2013-05-31 | 2013-08-21 | 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 |
| CN105846642A (en) * | 2016-04-19 | 2016-08-10 | 中北大学 | Magnet array planar rotation type energy harvester |
| CN106014887A (en) * | 2016-06-15 | 2016-10-12 | 浙江师范大学 | Suspension self-excitation runner piezoelectric beam energy harvester |
| CN107332463A (en) * | 2017-08-17 | 2017-11-07 | 浙江师范大学 | A kind of new type train bearing monitor system generator |
| CN107359815A (en) * | 2017-08-17 | 2017-11-17 | 浙江师范大学 | A kind of rotary piezoelectric generator of radial direction tension and compression excitation |
| CN107395051A (en) * | 2017-08-17 | 2017-11-24 | 浙江师范大学 | A kind of railroad train bearing monitor system generator |
| CN107482868A (en) * | 2017-08-17 | 2017-12-15 | 浙江师范大学 | A kind of water flow generator of magnetic coupling step-by-step excitation |
| CN109756152A (en) * | 2019-01-30 | 2019-05-14 | 浙江师范大学 | A kind of frequency conversion type gyromagnet excitation piezoelectric generator |
| CN109831119A (en) * | 2019-01-30 | 2019-05-31 | 浙江师范大学 | A kind of magnetic encourages rotary piezoelectric generator |
| CN113437899A (en) * | 2021-07-05 | 2021-09-24 | 浙江师范大学 | Follow-up rotating body monitoring device |
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| 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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| 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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| CN103259452B (en) * | 2013-05-31 | 2015-06-10 | 浙江师范大学 | Shaft-end overhung piezoelectric cantilever beam electric generator |
| CN103259452A (en) * | 2013-05-31 | 2013-08-21 | 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 |
| CN105846642A (en) * | 2016-04-19 | 2016-08-10 | 中北大学 | Magnet array planar rotation type energy harvester |
| 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 |
| CN106014887A (en) * | 2016-06-15 | 2016-10-12 | 浙江师范大学 | Suspension self-excitation runner piezoelectric beam energy harvester |
| CN107332463A (en) * | 2017-08-17 | 2017-11-07 | 浙江师范大学 | A kind of new type train bearing monitor system generator |
| CN107482868A (en) * | 2017-08-17 | 2017-12-15 | 浙江师范大学 | A kind of water flow generator of magnetic coupling step-by-step excitation |
| CN107395051A (en) * | 2017-08-17 | 2017-11-24 | 浙江师范大学 | A kind of railroad train bearing monitor system generator |
| CN107359815A (en) * | 2017-08-17 | 2017-11-17 | 浙江师范大学 | A kind of rotary piezoelectric generator of radial direction tension and compression excitation |
| CN107359815B (en) * | 2017-08-17 | 2023-05-16 | 浙江师范大学 | Radial tension-compression excited rotary piezoelectric generator |
| 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 |
| CN107332463B (en) * | 2017-08-17 | 2023-05-26 | 浙江师范大学 | Novel generator for train bearing monitoring system |
| CN109756152A (en) * | 2019-01-30 | 2019-05-14 | 浙江师范大学 | A kind of frequency conversion type gyromagnet excitation piezoelectric generator |
| CN109831119A (en) * | 2019-01-30 | 2019-05-31 | 浙江师范大学 | A kind of magnetic encourages rotary piezoelectric generator |
| CN109831119B (en) * | 2019-01-30 | 2020-04-21 | 浙江师范大学 | Magnetic excitation rotary piezoelectric generator |
| CN113437899A (en) * | 2021-07-05 | 2021-09-24 | 浙江师范大学 | Follow-up rotating body monitoring device |
| CN113437899B (en) * | 2021-07-05 | 2023-01-31 | 浙江师范大学 | Follow-up rotating body monitoring device |
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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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