CN105958868A - Runner-type piezoelectric beam energy harvester with suspended shaft end - Google Patents
Runner-type piezoelectric beam energy harvester with suspended shaft end Download PDFInfo
- Publication number
- CN105958868A CN105958868A CN201610459911.XA CN201610459911A CN105958868A CN 105958868 A CN105958868 A CN 105958868A CN 201610459911 A CN201610459911 A CN 201610459911A CN 105958868 A CN105958868 A CN 105958868A
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- Prior art keywords
- runner
- piezoelectric
- piezoelectric vibrator
- right end
- gear
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- 239000002184 metal Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000012190 activator Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 6
- 229910000906 Bronze Inorganic materials 0.000 claims description 5
- 239000010974 bronze Substances 0.000 claims description 5
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 abstract description 6
- 238000010248 power generation Methods 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 2
- 239000003302 ferromagnetic material Substances 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002964 excitative effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention relates to a runner-type piezoelectric beam energy harvester with a suspended shaft end, and belongs to the field of piezoelectric power generation. A left end cover and a right end cover are arranged at the left side and the right side of a runner respectively; metal substrates provided with cantilever beams are crimped between the left end cover and the side wall of the runner and the right end cover and the side wall of the runner respectively; each metal cantilever beam and an adhered piezoelectric crystal plate form a piezoelectric vibrator; an excited magnet is arranged at a free end of each piezoelectric vibrator, is arranged close to the runner and is arranged in a rectangular guide groove in the side surface of the runner; a cantilever shaft of a gear is arranged in a center hole of the runner and the end part is connected with the right end cover; the cantilever shaft and a ring cavity in the runner form a slideway; a cylindrical exciter made of a non-ferromagnetic material is arranged in the slideway; and exciting magnets are inlaid into two ends of the exciter. The runner-type piezoelectric beam energy harvester with the suspended shaft end has the features and advantages that a fixed support is not needed, the structure is simple and the rotating force on the exciter is small; the piezoelectric vibrators are reasonable in structure and the stresses of various points are the same after deformation; the piezoelectric vibrators are high in generating capacity, high in reliability and wide in effective band; and the runner-type piezoelectric beam energy harvester can be applied to the occasion of coaxial cantilever shaft gear and multi-gear as a standard component.
Description
Technical field
The invention belongs to new forms of energy and technical field of power generation, be specifically related to a kind of axle head and suspend rotary-type piezoelectric beam energy accumulator, be used for
The health monitoring systems of wind power gear axle box bearing, week and gear etc. is powered.
Background technology
Gear-box is the critical component of wind power generating set, and its function is transmission power.When wind-driven generator runs well, wind wheel
Rotating speed relatively low, cause generator efficiency relatively low, therefore need to be by gear-box speedup to improve generating capacity and efficiency.Due to wind-powered electricity generation
Gear-box is operated under speed change varying load environment, therefore easily breaks down；Additionally, maintenance difficult when wind turbine gearbox breaks down,
And cost is high, wind turbine gearbox runs and maintenance cost may be up to the 30% of overall operation cost.Therefore, there has been proposed multiple
The gear-box real-time monitoring system for state of form and method, to obtaining in real time each relevant parameter of gear-box, finding and solve in time
Certainly problem, thus reduce device damage degree and maintenance cost.At present, the key element of wind turbine gearbox monitoring includes gear, bearing
And all many-sides such as the load of moving component, vibration and temperature such as wheel shaft.
For the monitoring of gear and axle, preferable method is to be arranged on gear or axle or close by all kinds of sensing and monitoring systems
Gear or axle are installed, thus realize the direct-on-line monitoring of its running status；But this monitoring scheme is because being sensor monitoring system
Reliable, the sufficient supply of electric power that provides of system is difficult to popularization and application, and reason is: 1. gear and axle are in rotary motion state,
Cable power supply cannot be passed through；2. as use battery power, need to often change because battery is limited, when battery electric quantity not
Will be unable to realize effectively monitoring when changing enough and the most in time；3. away from the cantilevered axle of bearing block and end gear thereof and multiple tooth
When taking turns coaxial, all cannot be by relative motion structure microminiature electromotor between swing pinion or axle and fixing support.It is limited to wind-powered electricity generation tooth
The monitoring system energy supply problem of roller box gear and axle, also cannot realize real time on-line monitoring truly in current reality.
Summary of the invention
For the problem existing for wind turbine gearbox monitoring system power supply aspect, the present invention proposes a kind of axle head and suspends rotary-type piezoelectricity
Beam energy accumulator.The present invention adopted implementation scheme is that the runner left and right sides is separately installed with left and right end cap, left and right end cap and runner
All crimping metal basal board between sidewall, the cantilever beam on metal basal board constitutes piezoelectric vibrator, piezoelectric vibrator with bonding piezoelectric chip
Free end is provided with excited magnet, and excited magnet is installed near runner and is placed in the rectangle guide groove of runner side；Hanging of gear
In arm axle is placed in roller centre hole and end is connected with right end cap；Sealing ring, cantilevered axle it is provided with between cantilevered axle and roller centre hole
Constitute slideway with the ring cavity on runner, be filled with lubricating oil in slideway, the cylindrical activator of nonferromugnetic material is installed, swash
Encourage device two ends and be inlaid with exciting magnet；When the quantity of runner side piezoelectric vibrator and activator is both greater than 1, two adjacent piezoelectric vibrators
Symmetrical center line between angle and angle between two adjacent actuators centers and runner centre of gyration line can not integral multiple each other,
The pole configuration of the adjacent exciting magnet in activator the same side two configuration direction, pole in opposite direction, two adjacent two excited magnet magnetic is identical；
The runner left and right sides and adjacent left and right end cap sidewall thereof are designed with shape yardstick and the identical confined planes of quantity and deep gouge；Deep gouge is used
In accommodating piezoelectric chip, its planar dimension is more than piezoelectric chip, less than metal cantilever beams；Confined planes is for limiting piezoelectric vibrator
Deflection, confined planes is arc surface and its rational radius of curvature depends on metal basal board and the material of piezoelectric chip and thickness.
In the present invention, for improving generating capacity and the reliability of piezoelectric vibrator, piezoelectric chip is PZT4, the metal of 0.2～0.3mm
Substrate is beryllium-bronze, and metal basal board is 1～2.5 with the ratio scope of the thickness of piezoelectric chip, now the generating capacity of piezoelectric vibrator relatively strong,
Energy comparison is big；Energy deforms produced electric energy and maximum therein than the piezoelectric vibrator first order buckling referring to variant thickness ratio
Value bigger；Utilizing PZT4 and the piezoelectric vibrator of beryllium-bronze substrate composition for the present invention, the reasonable radius of curvature of confined planes isWherein α=hm/hpFor thickness ratio, hmAnd hpIt is respectively metal basal board and pressure
The thickness of electricity wafer.
In work process, the cantilevered axle of connector drives runner, left and right end cap, piezoelectric vibrator and excited magnet to rotate；At runner
In rotation process, activator is in slide bottom under the effect of its inertia force, so that producing between activator and excited magnet
Relative motion.When piezoelectric vibrator and excited magnet go to exciting magnet close to time, the axial work between excited magnet and exciting magnet
Firmly being gradually increased, piezoelectric vibrator produces axial bending deformation；The piezoelectric vibrator when excited magnet is overlapping with the center of exciting magnet
Suffered exciting force is maximum, and during the deflection maximum of piezoelectric vibrator, metal cantilever beams will abut on confined planes completely；Hereafter, pressure
The deflection of electric tachometer indicator is gradually reduced along with rotating further of runner and is gradually brought to original state；Above-mentioned excited magnet
During being gradually distance from again after close to each other with exciting magnet, piezoelectric vibrator completes a power generation process.
Advantage and characteristic: the present invention utilizes the relative motion between the inertia force realization of activator and runner and encourages piezoelectric vibrator axial
Bending, it is not necessary to extraneous fixing support, rotatory force suffered by simple in construction and activator little；Piezoelectric vibrator deflection is by confined planes radius
Determine, deform after each point stress identical, therefore generated energy is big, reliability is high, effective band width；Can be used for hanging as building block
Arm axle gear and the coaxial occasion of multi-gear, it is achieved the gear on-line monitoring of real meaning.
Accompanying drawing explanation
Fig. 1 is the structural representation of energy accumulator in a preferred embodiment of the present invention；
Fig. 2 is the A-A sectional view of Fig. 1；
Fig. 3 is the structural representation of runner in a preferred embodiment of the present invention；
Fig. 4 is the left view of Fig. 4；
Fig. 5 is the structural representation of right end cap in a preferred embodiment of the present invention；
Fig. 6 is the left view of Fig. 5；
Fig. 7 is the structural representation after piezoelectric vibrator and excited magnet assemble in a preferred embodiment of the present invention；
Fig. 8 is that in a preferred embodiment of the present invention, the ratio of piezoelectric vibrator generated energy compares relation curve with thickness.
Detailed description of the invention
The left and right sides of runner a is provided with left end cap b and right end cap c, left end cap b and right end cap c and runner a's by screw respectively
All crimping metal basal board h1 between sidewall, the cantilever beam h11 on metal basal board h1 and bonding piezoelectric chip h2 constitutes piezoelectric vibrator
H, piezoelectric vibrator h free end is provided with excited magnet g, excited magnet g through screw and installs near runner a and be placed in runner a side
In rectangle guide groove a1；In cantilevered axle f of gear e is placed in the centre bore a2 of runner a and end is connected with right end cap c through screw；Cantilever
Being provided with sealing ring o between the centre bore a2 of axle f and runner a, cantilevered axle f constitutes slideway D with the ring cavity a3 on runner a, fills out in slideway D
Being filled with lubricating oil, be provided with the cylindrical activator d of nonferromugnetic material, the two ends of activator d are inlaid with exciting magnet i；When turning
When the quantity of wheel a side piezoelectric vibrator h and activator d is both greater than 1, the angle Q1 between the symmetrical center line of two adjacent piezoelectric vibrator h
With the angle Q2 that two between adjacent actuators d center and runner a centre of gyration line can not integral multiple, activator d the same side two each other
The pole configuration of adjacent actuators Magnet i configuration direction, pole in opposite direction, two adjacent two excited magnet magnetic g is identical；The left and right of runner a
Both sides and adjacent left end cap b thereof are designed with shape yardstick and the identical confined planes M of quantity and deep gouge C with the side of right end cap c；Heavy
Groove C is used for accommodating piezoelectric chip h2, and its planar dimension is more than piezoelectric chip h2, less than metal cantilever beams h11；Confined planes M is used for
Limiting the deflection of piezoelectric vibrator h, confined planes M is arc surface and its rational radius of curvature depends on metal basal board h1 and piezo crystals
The material of sheet h2 and thickness.
In the present invention, for improving generating capacity and the reliability of piezoelectric vibrator h, piezoelectric chip is PZT4, the metal of 0.2～0.3mm
Substrate is beryllium-bronze, and the ratio scope of the thickness of metal basal board h1 and piezoelectric chip h2 is 1～2.5, now the generating energy of piezoelectric vibrator h
Power compared with strong, energy comparison is big；Energy than the piezoelectric vibrator h first order buckling referring to variant thickness ratio deform produced electric energy and its
In maximum bigger；Utilizing PZT4 and the piezoelectric vibrator of beryllium-bronze substrate composition for the present invention, confined planes M's is reasonable
Radius of curvature isWherein α=hm/hpFor thickness ratio, hmAnd hpIt is respectively gold
Belong to substrate h1 and the thickness of piezoelectric chip h2.
In work process, cantilevered axle f of connector e drives runner a, left end cap b, right end cap c, piezoelectric vibrator h and excited magnet g
Rotate；In runner a rotation process, activator d is in the bottom of slideway D under the effect of its inertia force, so that activator d
And between excited magnet g, produce relative motion.When piezoelectric vibrator h and excited magnet g go to exciting magnet i close to time, by excitatory
Axial force between ferrum g and exciting magnet i is gradually increased, and piezoelectric vibrator h produces axial bending deformation；When excited magnet g is with sharp
During the center overlap of field core i, the exciting force suffered by piezoelectric vibrator h is maximum, metal cantilever beams during the deflection maximum of piezoelectric vibrator h
H11 will abut on confined planes M completely；Hereafter, the deflection of piezoelectric vibrator h be gradually reduced along with rotating further of runner a,
And it is gradually brought to original state；During being gradually distance from again after above-mentioned excited magnet g and exciting magnet i is close to each other, piezoelectricity
Oscillator h completes a power generation process.
Obviously, the present invention utilizes the relative motion between the inertia force realization of activator d and runner a and encourages piezoelectric vibrator h the most curved
Bent, it is not necessary to extraneous fixing support, rotatory force suffered by simple in construction and activator little；The deflection of piezoelectric vibrator h is by confined planes M's
Radius determines, deform after each point stress identical, therefore generated energy is big, reliability is high, effective band width；Can be used for cantilevered axle gear
And the occasion that multi-gear is coaxial, it is achieved the gear of real meaning and the on-line monitoring of axle system.
Claims (1)
1. an axle head suspends rotary-type piezoelectric beam energy accumulator, it is characterised in that: the runner left and right sides is respectively provided with left and right end cap,
The metal basal board being provided with cantilever beam, metal cantilever beams and bonding piezoelectric chip all it is crimped with between left and right end cap and runner sidewall
Constituting piezoelectric vibrator, piezoelectric vibrator free end is equipped with excited magnet, and excited magnet is installed near runner and is placed in the length of runner side
In square guide groove；In the cantilevered axle of gear is placed in roller centre hole and end is connected with right end cap；Cantilevered axle and roller centre hole it
Between be provided with sealing ring, cantilevered axle constitutes slideway with the ring cavity on runner, is filled with lubricating oil, is provided with nonferromagnetic material in slideway
The cylindrical activator of material, activator two ends are inlaid with exciting magnet；When the quantity of runner side piezoelectric vibrator and activator is the biggest
Yu Shi, the angle between two adjacent piezoelectric vibrator symmetrical center line and the folder between two adjacent actuators centers and runner centre of gyration line
Angle can not integral multiple each other, the pole configuration of the adjacent exciting magnet in activator the same side two is in opposite direction, on two adjacent piezoelectric vibrators
The pole configuration direction of excited magnet is identical；The side of the runner left and right sides and adjacent left and right end cap thereof be designed with shape yardstick and
Confined planes that quantity is identical and deep gouge；Deep gouge planar dimension is more than piezoelectric chip, less than metal cantilever beams；Piezoelectric chip is
PZT4, the metal basal board of 0.2～0.3mm are beryllium-bronze, and metal basal board is 1～2.5 with the ratio scope of the thickness of piezoelectric chip；Spacing
The reasonable radius of curvature in face isWherein α=hm/hpFor thickness ratio, hmWith
hpIt is respectively metal basal board and the thickness of piezoelectric chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610459911.XA CN105958868B (en) | 2016-06-15 | 2016-06-15 | A kind of shaft end suspends rotary-type piezoelectric beam energy accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610459911.XA CN105958868B (en) | 2016-06-15 | 2016-06-15 | A kind of shaft end suspends rotary-type piezoelectric beam energy accumulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105958868A true CN105958868A (en) | 2016-09-21 |
| CN105958868B CN105958868B (en) | 2017-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610459911.XA Active CN105958868B (en) | 2016-06-15 | 2016-06-15 | A kind of shaft end suspends rotary-type piezoelectric beam energy accumulator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395059A (en) * | 2017-08-17 | 2017-11-24 | 浙江师范大学 | A kind of wind-force causes the energy accumulator that shakes |
| CN107395061A (en) * | 2017-08-17 | 2017-11-24 | 浙江师范大学 | A kind of charming appearance and behaviour piezoelectric harvester |
| CN107592031A (en) * | 2017-10-31 | 2018-01-16 | 长春工业大学 | Towards the non-linear broadband piezoelectric energy harvesting device of tire pressure monitoring sensor energy supply |
| CN107769613A (en) * | 2017-10-31 | 2018-03-06 | 长春工业大学 | A kind of rotary magnetic force multi-modal based on monostable stirs piezoelectric harvester |
| CN112181178A (en) * | 2020-10-04 | 2021-01-05 | 长春工业大学 | Wireless mouse device with self-energy supply system |
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| CN103269182A (en) * | 2013-05-31 | 2013-08-28 | 浙江师范大学 | Overhanging type rotating generator based on piezoelectric cantilever mutual excitation |
| CN104485850A (en) * | 2015-01-07 | 2015-04-01 | 浙江师范大学 | Piezoelectric generator excited by human motion |
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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 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395059A (en) * | 2017-08-17 | 2017-11-24 | 浙江师范大学 | A kind of wind-force causes the energy accumulator that shakes |
| CN107395061A (en) * | 2017-08-17 | 2017-11-24 | 浙江师范大学 | A kind of charming appearance and behaviour piezoelectric harvester |
| CN107395061B (en) * | 2017-08-17 | 2023-05-16 | 浙江师范大学 | Wind-induced piezoelectric energy harvester |
| CN107395059B (en) * | 2017-08-17 | 2023-10-13 | 浙江师范大学 | Wind-driven vibration energy harvester |
| CN107592031A (en) * | 2017-10-31 | 2018-01-16 | 长春工业大学 | Towards the non-linear broadband piezoelectric energy harvesting device of tire pressure monitoring sensor energy supply |
| CN107769613A (en) * | 2017-10-31 | 2018-03-06 | 长春工业大学 | A kind of rotary magnetic force multi-modal based on monostable stirs piezoelectric harvester |
| CN107769613B (en) * | 2017-10-31 | 2019-08-27 | 长春工业大学 | A kind of rotary magnetic force multi-modal based on monostable-stirs piezoelectric harvester |
| CN112181178A (en) * | 2020-10-04 | 2021-01-05 | 长春工业大学 | Wireless mouse device with self-energy supply system |
| CN112181178B (en) * | 2020-10-04 | 2022-06-17 | 长春工业大学 | Wireless mouse device with self-energy supply system |
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Address after: 213164 North Building 2523, Huiyan building, Changzhou science and Education City, No. 18, Changwu Middle Road, Wujin District, Changzhou City, Jiangsu Province Patentee after: Changzhou angde Industrial Equipment Technology Co. Ltd. Address before: 213164 room 2521, North Tower, Hui Yan building, Changzhou science and Education Town, 18 Wujin Road, Wujin, Changzhou. Patentee before: Changzhou angde Industrial Equipment Technology Co. Ltd. |
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