CN202721624U - Bidirectional magnetic force coupling axial excitation and limit type rotating shaft type piezoelectric generator - Google Patents
Bidirectional magnetic force coupling axial excitation and limit type rotating shaft type piezoelectric generator Download PDFInfo
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- CN202721624U CN202721624U CN 201220442464 CN201220442464U CN202721624U CN 202721624 U CN202721624 U CN 202721624U CN 201220442464 CN201220442464 CN 201220442464 CN 201220442464 U CN201220442464 U CN 201220442464U CN 202721624 U CN202721624 U CN 202721624U
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 12
- 230000008878 coupling Effects 0.000 title claims abstract description 12
- 238000010168 coupling process Methods 0.000 title claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 12
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 230000005611 electricity Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
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- 238000005452 bending Methods 0.000 description 6
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- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model relates to a bidirectional magnetic force coupling axial excitation and limit type rotating shaft type piezoelectric generator, belonging to the field of piezoelectric power generation, wherein between two bearing seats there is provided a cylinder fixed through a screw, a plurality of groups of magnets 1 and 2 are alternatively inlaid on the different cross sections of the inner wall of the cylinder, the two bearing seats are respectively provided with a bearing and a magnetic ring, a main shaft is mounted on the bearing seats, the spline of the main shaft is sleeved with a plurality of groups of piezoelectric transducers, and a pair of moving magnet different magnetic poles are oppositely mounted on the free end of the piezoelectric transducers through screws. The bidirectional magnetic force coupling axial excitation and limit type rotating shaft type piezoelectric generator has the advantages of being free of contact impact and noise, being high in reliability, being convenient for providing electric energy for a monitoring system rotating with a rotating shaft, and being capable of generating electricity in a uniform speed and a high speed.
Description
Technical field
The utility model belongs to the piezo-electric generating field, is specifically related to a kind of bidirectional magnetic force coupling axial excitation and spacing rotary shaft piezoelectric generator, is used for the power supply of rotating machinery health monitoring systems.
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 helicopter screw propeller, automotive tire pressure, aero-engine/bullet train/rotating machineries such as oil gas brill main shaft at first.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, so 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.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, the existing rotary shaft piezoelectric generator that rotates with rotary body 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 and rotary state cataclysm alternately because centrifugal force is excessive during especially even high speed rotating piezoelectric vibrator will be damaged because stressed/deformed is excessive; 2. dial type, the piezoelectric vibrator that utilizes fixing moving tooth to stir rotation makes it along direction of rotation flexural deformation, and the method easily produces larger impact and noise when high speed larger, and piezoelectric vibrator is damaged because sex change is excessive; 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.
Above-mentioned 3 classes are that piezoelectric vibrator all is out of shape along the direction of rotation of rotary body with the common feature of the rotary shaft piezoelectric generator that rotary body rotates, 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 deformation 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 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, aero-engine/bullet train/oil gas and bores the contour rotating speed of main shaft, at the uniform velocity 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 trunnion 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 bidirectional magnetic force coupling axial excitation and spacing rotary shaft piezoelectric generator, for satisfying required real-time, the sufficient power requirement of rotating machinery health monitoring systems, generator must possess following characteristic: 1. rotate with rotary body, 2. have enough generating capacities, all can generate electricity and have higher reliability when 3. at the uniform velocity reaching high speed.
The technical scheme that the utility model is taked is: be screwed the connection cylinder between two bearing pedestals one and the bearing pedestal two, alternately inlay many group fixed magnets one and fixed magnet two on the varying cross-section of described cylinder inner wall, the magnetic pole of described fixed magnet one and fixed magnet two is opposite along radially installation and the pole orientation of described cylinder; On described bearing pedestal one and bearing pedestal two, be inlaid with respectively bearing and magnet ring, and the magnet ring on described bearing pedestal one and the bearing pedestal two points to the pole polarity in the cylinder and the moving magnet one that is adjacent or moving magnet two, and to point to the interior pole polarity of cylinders identical; Main shaft is installed in described two bearing pedestals and upper by described two bearings, spline upper sleeve at described main shaft has PZT (piezoelectric transducer), and described every group of PZT (piezoelectric transducer) is crimped between described two bearings by a pair of ladder back-up ring, a pair of short back-up ring and each long back-up ring; Described each group PZT (piezoelectric transducer) is by the cantilever beam on the metal substrate and piezoelectric chip is bonding forms, and is provided with splined hole in the center of the metal substrate of described PZT (piezoelectric transducer); A pair of moving magnet one and moving magnet two opposite poles relatively are installed in the free end of described PZT (piezoelectric transducer) by screw, the moving magnet one on the described same group of PZT (piezoelectric transducer) is identical with the axial arrangement direction of moving magnet two magnetic poles, the moving magnet one on the two adjacent groups PZT (piezoelectric transducer) and the axial arrangement opposite direction of moving magnet two magnetic poles; The pole polarity of pointing to the cylinder inboard on the polarity of the moving magnet one adjacent with magnet ring or the magnetic pole of moving magnet two and the described magnet ring is identical.
Rotary main shaft or hard-wired rotary main shaft during bidirectional magnetic force coupling axial excitation of the present utility model and spacing rotary shaft piezoelectric generator can be used for moving.For example, the main shaft of aircraft and Steam Screw etc. is when its centre of gyration rotates, also with the motion of aircraft or steamer, when aircraft and the motion of steamer acceleration or deceleration, PZT (piezoelectric transducer) also can produce along the flexural deformation of main-shaft axis direction under the effect of himself and moving magnet inertia force; For the main shaft of fixing lathe etc., in the process of transportation and assembling, also exist make that PZT (piezoelectric transducer) produces moderate finite deformation may.Therefore, the utility model is inlayed magnet ring at bearing pedestal, two groups of like poles between the moving magnet on the adjacent PZT (piezoelectric transducer) are installed relatively, thereby produce repulsive force between the moving magnet that makes magnet ring and be adjacent and between the moving magnet on two groups of adjacent PZT (piezoelectric transducer)s, avoid PZT (piezoelectric transducer) to damage because deflection is excessive.
In the utility model, be positioned at the magnet ring on the bearing pedestal and the fixed magnet one that is positioned on the cylinder is fixed with the pivot of fixed magnet two relative main shafts, and PZT (piezoelectric transducer) and place the free-ended moving magnet of PZT (piezoelectric transducer) to rotate with main shaft.The effect that is positioned at the magnet ring on the bearing pedestal is to apply repulsive force to close with it PZT (piezoelectric transducer), and this repulsive force transmits vertically by the repulsive interaction of the moving magnet like pole on two groups of adjacent PZT (piezoelectric transducer)s, thereby avoids PZT (piezoelectric transducer) to produce excessive axial deformation; The moving magnet one and moving magnet two effects that are positioned on the cylinder are that the moving magnet that rotates is applied thrust alternately, thereby make PZT (piezoelectric transducer) along the axial bending vibration of main shaft, and convert mechanical energy to electric energy; Rotate because PZT (piezoelectric transducer) is fixed on the main shaft and with it, the electric energy of being convenient to generate is directly supplied with the sensing and monitoring system with the main shaft rotation.
Characteristic of the present utility model is: adopt the bidirectional magnetic force coupling to finish simultaneously axial excitation and the deflection control of PZT (piezoelectric transducer), reliability is high; The bending deformation quantity of piezoelectric vibrator and energy output are mainly determined by the magnetic field intensity between magnetic pole, 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. PZT (piezoelectric transducer) rotates, and realizes noncontact axial excitation and distortion protection by the bidirectional magnetic force coupling with main shaft, and contactless impact and noise, reliability is high and be convenient to electric energy is offered monitoring system with the rotating shaft rotation; 2. PZT (piezoelectric transducer) is along the distortion of main shaft axial bending, 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 structural principle sketch of generator in preferred embodiment of the utility model;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is the structural representation of PZT (piezoelectric transducer) in preferred embodiment of the utility model;
Fig. 4 is the B-B profile of Fig. 3;
Fig. 5 is the I section enlarged drawing of Fig. 1;
Fig. 6 is the II section enlarged drawing of Fig. 1;
Embodiment
Bidirectional magnetic force coupling axial excitation and spacing rotary shaft piezoelectric generator that the utility model proposes can be used for all kinds rotating member, bore main shaft etc. such as helicopter screw propeller, aero-engine, bullet train, oil gas.For different application scenarios, may there be certain difference in the concrete structure of rotating member, but does not affect novelty of the present utility model and creativeness, now is applied as example with rotor shaft, specifies execution mode of the present utility model:
Two bearing pedestals 1 and bearing pedestal 21 ' between be screwed and connect cylinder 2, the magnetic pole of ', described fixed magnet 1 and fixed magnet 24 ' is opposite along radially installation and the pole orientation of described cylinder 2 alternately to inlay many group fixed magnets 1 and fixed magnets 24 on the varying cross-section of described cylinder 2 inwalls; Pole polarity and the moving magnet 1 that is adjacent or moving magnet 24 that magnet ring 12 at described bearing pedestal 1 and bearing pedestal 21 on ' on be inlaid with respectively bearing 5 and magnet ring 12, and described bearing pedestal 1 and bearing pedestal 21 ' points in the cylinders 2 ' to point to the interior pole polarity of cylinder 2 identical; Main shaft 6 is installed on described two bearing pedestals 1 and 1 ' by described two bearings 5, spline 601 covers at described main shaft 6 have PZT (piezoelectric transducer) 7, and described every group of PZT (piezoelectric transducer) 7 is crimped between described two bearings 5 by a pair of ladder back-up ring 8, a pair of short back-up ring 9 and each long back-up ring 10; Described each group PZT (piezoelectric transducer) 7 is provided with splined hole 703 by the cantilever beam 7011 on the metal substrate 701 and piezoelectric chip 702 bonding forming in the center of the metal substrate of described PZT (piezoelectric transducer) 7; The axial arrangement direction of a pair of moving magnet 1 and moving magnet 2 11 ' opposite pole relatively be installed in the free end of described PZT (piezoelectric transducer) 7 by screw, moving magnet 1 and moving magnet 2 11 on the described same group of PZT (piezoelectric transducer) 7 ' magnetic pole is identical, moving magnet 1 and moving magnet 2 11 on the two adjacent groups PZT (piezoelectric transducer) 7 ' the axial arrangement opposite direction of magnetic pole; Moving magnet one 11 or the moving magnet two 11 adjacent with magnet ring 12 ' the polarity of magnetic pole and described magnet ring 12 on to point to the pole polarity of cylinder 2 inboards identical.
Rotary main shaft or hard-wired rotary main shaft during bidirectional magnetic force coupling axial excitation of the present utility model and spacing rotary shaft piezoelectric generator can be used for moving.For example, the main shaft 6 of aircraft and Steam Screw etc. is when its centre of gyration rotates, also with aircraft or steamer motion, when the motion of aircraft and steamer acceleration or deceleration, PZT (piezoelectric transducer) 7 is at himself and moving magnet 1 and moving magnet 2 11 ' also can produce along the flexural deformation of main shaft 6 axis directions under the effect of inertia force; For the main shaft 6 of fixing lathe etc., in the process of transportation and assembling, also exist make that PZT (piezoelectric transducer) 7 produces moderate finite deformations may.Therefore, the utility model is at bearing pedestal 1 and bearing pedestal 21 ' inlay magnet ring 12, also make simultaneously two groups of moving magnet 1 and moving magnets 2 11 on the adjacent PZT (piezoelectric transducer) 7 ' between like pole relatively install, produce repulsive force between thereby the moving magnet 1 that makes magnet ring 12 and be adjacent or the moving magnet 2 11 ' between and moving magnet 1 and moving magnet 2 11 on two groups of adjacent PZT (piezoelectric transducer)s 7 ', avoid PZT (piezoelectric transducer) 7 to damage because deflection is excessive.
In the utility model, the pivot of ' on magnet ring 12 and be positioned at fixed magnet 1 and fixed magnet 24 on the cylinder 2 ' the relative main shaft 6 that is positioned at bearing pedestal 1 and bearing pedestal 21 is fixed, and PZT (piezoelectric transducer) 7 and place PZT (piezoelectric transducer) 7 free-ended moving magnet 1 and moving magnets 2 11 ' with main shaft 6 rotations.Be positioned at bearing pedestal 1 and bearing pedestal 21 ' on the effect of magnet ring 12 be to apply repulsive force to close with it PZT (piezoelectric transducer) 7, and this repulsive force is by moving magnet 1 and moving magnet 2 11 on two groups of adjacent PZT (piezoelectric transducer)s 7 ' repulsive interaction of like pole transmits vertically, thereby avoids PZT (piezoelectric transducer) 7 to produce excessive axial deformation; Being positioned at moving magnet 1 and moving magnet 24 on the cylinder 2 ' effect is that the moving magnet 11 of rotation or moving magnet 11 ' are applied alternately thrust, thus make PZT (piezoelectric transducer) 7 along the axial bending vibration of main shaft 6, and convert mechanical energy to electric energy; Rotate because PZT (piezoelectric transducer) 7 is fixed on the main shaft 6 and with it, the electric energy of being convenient to generate is directly supplied with the sensing and monitoring system with main shaft 6 rotations.
Magnetic field force excitation PZT (piezoelectric transducer) axial bending distortion and to limit the process of its deflection as follows in the utility model:
When main shaft 6 rotation makes moving magnet 1 and moving magnet 2 11 ' go to the below and with moving magnet 1 near the time, the first, the 3rd, the 5th PZT (piezoelectric transducer) 7 from left to right is crooked, the second, the 4th, the 6th PZT (piezoelectric transducer) 7 bending left to the right, therefore moving magnet 1 and the moving magnet 2 11 on adjacent first and second, the 3rd and the 4th, the 5th and the 6th PZT (piezoelectric transducer) 7 ' N extremely mutually close, produce the repulsive force that increases gradually, thereby suppress the deflection of PZT (piezoelectric transducer) 7 because produced by fixed magnet one 4 effects; When main shaft 6 rotation makes moving magnet 1 and moving magnet 2 11 ' go to top and with moving magnet 24 ' near the time, from left to right first, the 3rd, the 5th piezoelectric ring energy 7 is crooked left, second, the 4th, the 6th piezoelectric ring energy 7 is crooked to the right, then the adjacent the second and the 3rd, moving magnet 1 on the 4th and the 5th PZT (piezoelectric transducer) 7 and moving magnet 2 11 ' S extremely mutually close, moving magnet 1 on the first and the 6th piezoelectric vibrator or moving magnet 2 11 ' the S utmost point with to be adjacent the S of magnet ring 12 extremely close, produce the repulsive force that increases gradually, thereby suppress PZT (piezoelectric transducer) 7 because of being subjected to fixed magnet 24 ' act on the deflection that produces.
The like pole that in the piezoelectric generator course of work of the present utility model, utilizes moving magnet 1 and moving magnet 2 11 between ' and fixed magnet 1 or moving magnet 24 ' near the time repulsive force excitation piezoelectric vibrator axial deformation that produces; Simultaneously, also utilize moving magnet 1 and moving magnet 2 11 on adjacent two PZT (piezoelectric transducer)s 7 ' between repulsive force and and magnet ring 12 adjacent PZT (piezoelectric transducer)s 7 on moving magnet 1 or moving magnet 2 11 ' and the like pole of described magnet ring 12 between the deflection of repulsive force restriction PZT (piezoelectric transducer), thereby avoid damaging because deflection is excessive.
Claims (1)
1. bidirectional magnetic force coupling axial excitation and spacing rotary shaft piezoelectric generator, it is characterized in that: be screwed the connection cylinder between two bearing pedestals one and the bearing pedestal two, alternately inlay many group fixed magnets one and fixed magnet two on the varying cross-section of described cylinder inner wall, the magnetic pole of described fixed magnet one and fixed magnet two is opposite along radially installation and the pole orientation of described cylinder; On described bearing pedestal one and bearing pedestal two, be inlaid with respectively bearing and magnet ring, and the magnet ring on described bearing pedestal one and the bearing pedestal two points to the pole polarity in the cylinder and the moving magnet one that is adjacent or moving magnet two, and to point to the interior pole polarity of cylinders identical; Main shaft is installed in described two bearing pedestals and upper by described two bearings, spline upper sleeve at described main shaft has PZT (piezoelectric transducer), and described every group of PZT (piezoelectric transducer) is crimped between described two bearings by a pair of ladder back-up ring, a pair of short back-up ring and each long back-up ring; Described each group PZT (piezoelectric transducer) is by the cantilever beam on the metal substrate and piezoelectric chip is bonding forms, and is provided with splined hole in the center of the metal substrate of described PZT (piezoelectric transducer); A pair of moving magnet one and moving magnet two opposite poles relatively are installed in the free end of described PZT (piezoelectric transducer) by screw, the moving magnet one on the described same group of PZT (piezoelectric transducer) is identical with the axial arrangement direction of moving magnet two magnetic poles, the moving magnet one on the two adjacent groups PZT (piezoelectric transducer) and the axial arrangement opposite direction of moving magnet two magnetic poles; The pole polarity of pointing to the cylinder inboard on the polarity of the moving magnet one adjacent with magnet ring or the magnetic pole of moving magnet two and the described magnet ring is identical.
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|---|---|---|---|
| CN 201220442464 CN202721624U (en) | 2012-09-01 | 2012-09-01 | Bidirectional magnetic force coupling axial excitation and limit type rotating shaft type piezoelectric generator |
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| CN 201220442464 CN202721624U (en) | 2012-09-01 | 2012-09-01 | Bidirectional magnetic force coupling axial excitation and limit type rotating shaft type piezoelectric generator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801358A (en) * | 2012-09-01 | 2012-11-28 | 浙江师范大学 | Bi-directionally magnetically coupled and axially excited and limited rotating-shaft piezoelectric generator |
| CN103269182A (en) * | 2013-05-31 | 2013-08-28 | 浙江师范大学 | Overhanging type rotating generator based on piezoelectric cantilever mutual excitation |
| CN104578911A (en) * | 2015-01-31 | 2015-04-29 | 张文明 | Bistable contactless magnetic vibration energy capture device |
| CN105226994A (en) * | 2015-10-27 | 2016-01-06 | 张文明 | Multifrequency coupled vibrations energy capture device |
| CN108462403A (en) * | 2018-03-13 | 2018-08-28 | 吉林大学 | A kind of double working modes wideband bistable state piezoelectric generating device |
-
2012
- 2012-09-01 CN CN 201220442464 patent/CN202721624U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801358A (en) * | 2012-09-01 | 2012-11-28 | 浙江师范大学 | Bi-directionally magnetically coupled and axially excited and limited rotating-shaft piezoelectric generator |
| CN102801358B (en) * | 2012-09-01 | 2015-06-10 | 浙江师范大学 | Bi-directionally magnetically coupled and axially excited and limited rotating-shaft piezoelectric generator |
| CN103269182A (en) * | 2013-05-31 | 2013-08-28 | 浙江师范大学 | Overhanging type rotating generator based on piezoelectric cantilever mutual excitation |
| CN103269182B (en) * | 2013-05-31 | 2015-12-09 | 浙江师范大学 | Based on the hanging type rotary generator that piezoelectric cantilever mutual swashs |
| CN104578911A (en) * | 2015-01-31 | 2015-04-29 | 张文明 | Bistable contactless magnetic vibration energy capture device |
| CN105226994A (en) * | 2015-10-27 | 2016-01-06 | 张文明 | Multifrequency coupled vibrations energy capture device |
| CN108462403A (en) * | 2018-03-13 | 2018-08-28 | 吉林大学 | A kind of double working modes wideband bistable state piezoelectric generating device |
| CN108462403B (en) * | 2018-03-13 | 2023-12-22 | 吉林大学 | Double-working-mode broadband bistable piezoelectric power generation device |
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