CN103490667A - Elastic piece type piezo-electric power generating set and method - Google Patents

Elastic piece type piezo-electric power generating set and method Download PDF

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Publication number
CN103490667A
CN103490667A CN201310365861.5A CN201310365861A CN103490667A CN 103490667 A CN103490667 A CN 103490667A CN 201310365861 A CN201310365861 A CN 201310365861A CN 103490667 A CN103490667 A CN 103490667A
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China
Prior art keywords
rotating shaft
ball
piezoelectric
flexure strip
turbine rotor
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CN201310365861.5A
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Chinese (zh)
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CN103490667B (en
Inventor
杨颖�
沈钦龙
金家楣
王一平
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南京航空航天大学
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Publication of CN103490667A publication Critical patent/CN103490667A/en
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Abstract

The invention provides an elastic piece type piezo-electric power generating set and method, and belongs to the field of wind and hydraulic power generation. The elastic piece type piezo-electric power generating set is characterized in that a turbine rotor component, at least two sets of elastic idler wheel components and a piezoelectric ring are included, the turbine rotor component is composed of a rotating shaft (7), turbine blades (9) fixed at one end of the rotating shaft (7) and an elastic piece shaft sleeve (8) fixed in the middle of the rotating shaft (7), each set of elastic idler wheel component is composed of rolling balls (3), a rolling ball rotating shaft (4), a supporting frame (5) and an elastic piece (6), the piezoelectric ring (2) is composed of a plurality of mutually insulated piezoelectric units and fixed on the inner circle of a box body (1), and the elastic pieces (6) of the elastic idler wheel components enable the rolling balls (3) to maintain contact with the piezoelectric ring (2) all the time. The turbine rotor component rotates under the action of fluid force in the environment, the rolling balls (3) are driven by the elastic pieces (6) to roll on a cylindrical face in the piezoelectric ring (2), so that the piezoelectric units bear period pressure to output electric charges, and conversion from fluid kinetic energy to electric energy is achieved.

Description

Reed-type piezoelectric generating device and method

Technical field

The invention belongs to wind power generation and hydroelectric power generation field, particularly a kind of Reed-type piezoelectric generating device and method.

Background technology

Utilize nature wind energy and water to be generated electricity, for various outdoor facilities carry out the development trend that self-powered system meets current energy-saving and environmental protection, low-carbon (LC), in fields such as industrial monitoring, intelligent transportation, intelligent grid, mine safety, environmental monitoring, safety home, health cares, have broad application prospects.

The Priya of the U.S. adopts piezoelectric device to manufacture and design a kind of small-sized wind power generator US11/252903.Can under the wind drive of 8~16 kilometers of speed per hours, generate electricity.The blade of generator is linked on cam, makes to produce vibration around the conglobate a series of bimorphs of axle row, thus the output electric energy.This scheme has two shortcomings: the one, and piezoelectric bimorph rotates each time all and collides with cam, and therefore friction produces wearing and tearing, causes energy loss, reduces useful life simultaneously.The 2nd, when wind speed is low, blade and cam can not break away from, and piezoelectric bimorph keeps certain case of bending constant, now no longer generates electricity.The new road of being developed jointly, be equipped with the Blast Furnace Top Gas Recovery Turbine Unit (TRT) that adopts component of piezoelectric conversion by NEC TOKIN and Japanese Heardea is identified at Japan's trial run.Its principle is exactly by being placed in the rolling of steel ball in cannelure, clashes into piezoelectric element and generates electricity.This device is arranged in the vcehicular tunnel that the volume of traffic is large, the air stream drives sign rotation produced in the time of can utilizing automobile to cross.Steel ball is arranged in the circular passage be separated into by component of piezoelectric conversion, and when sign is rotated, steel ball will move in passage, clashes into the piezoelectric element at passage two ends, makes the piezoelectric element output charge.The major defect of this scheme is, when car crosses and sign will high speed rotating while producing strong wind continuously, thereby makes steel ball be close to the component of piezoelectric conversion motion, and piezoelectric element can not get the pressure-acting of alternation, just can not generate electricity.

Summary of the invention

The object of the present invention is to provide a kind of Reed-type piezoelectric generating device and method efficient, applied widely of utilizing piezoelectric to collect fluid dynamic energy.

A kind of Reed-type piezoelectric generating device is characterized in that: turbine rotor assembly, at least 2 group elastic roller assemblies, piezoelectricity circle, consist of; Described turbine rotor assembly consists of rotating shaft, the turbo blade that is fixed on rotating shaft one end, the flexure strip axle sleeve that is fixed on the centre of rotating shaft; Described every group of elastic roller assembly forms by ball, ball rotating shaft, bracing frame, flexure strip; Wherein ball is installed in bracing frame by the ball rotating shaft, and can rotate along the ball rotating shaft; Flexure strip one end and bracing frame are fastenedly connected, and the other end and flexure strip axle sleeve are fastenedly connected; Described elastic roller assembly surpasses 2 groups, and symmetrical; Described piezoelectricity circle is made by piezoelectric, is divided into some piezoelectric units, mutually insulated, and be fixed on the box body inner ring; The flexure strip of elastic roller assembly makes ball remain and contact with the piezoelectricity circle, during the rotation of elastic roller assembly, ball produces pressure, the piezoelectric unit of alternating action on the piezoelectricity circle to the piezoelectricity circle, force each piezoelectric unit of piezoelectricity circle alternately to produce electric charge output, obtain electric energy.

The electricity-generating method of described Reed-type piezoelectric generating device, it is characterized in that: the turbine rotor assembly rotates under the fluid force effect in environment, drive ball through flexure strip rolls on piezoelectricity circle inner cylinder face, make piezoelectric unit bear cycle pressure, output charge, realize the conversion of fluid dynamic energy to electric energy.

Compared with prior art, its remarkable advantage: (1) adopts flexure strip in the present invention, can be according to the varying environment flow velocity, and the little flexure strip of flow velocity employing rigidity of lower time, adopt the flexure strip that rigidity is large, thereby make its accommodation wider when flow velocity is large; (2) overcome the device that shock is provided by centrifugal force, can produce centrifugal force excessive and be close to piezoelectric vibrator and lost efficacy under the high-velocity fluid effect; (3) can pass through to increase the quantity of elastic roller assembly, thereby make the frequency of the extruding piezoelectricity circle that often circles increase, thereby can make the piezoelectricity circle produce more lasting electric energy; (4) utilize piezoelectric effect, harvest energy from the motion of air or other fluids, be converted into electric energy, is a kind of small-size wind power-generating or hydroelectric installation, can be used for the mini-plant of outdoor use or the self-powered of facility.Can generate electricity under very little and larger wind conditions, there is adaptability widely.2-3 level gentle breeze just can produce lasting electric energy, and its dynamo-electric transformation efficiency is suitable with advanced at present large-scale wind electricity device efficiency, can be with thinking the wireless sensing net node power supply.

The accompanying drawing explanation

Fig. 1 is the master map of piezoelectric generating device of the present invention;

Fig. 2 is vertical view;

Fig. 3 is elastic roller assembly partial enlarged drawing;

Number in the figure name henry: 1, box body, 2, the piezoelectricity circle, 3, ball, 4, the ball rotating shaft, 5, bracing frame, 6, flexure strip, 7, rotating shaft, 8, the flexure strip axle sleeve, 9, turbo blade.

Embodiment

In conjunction with Fig. 1, piezoelectric generating device of the present invention consists of turbine rotor assembly, elastic roller assembly, piezoelectricity circle, described turbine rotor assembly comprises that turbo blade 9, rotating shaft 7 and flexure strip axle sleeve 8 form, turbo blade 9 is fixed on an end of rotating shaft 7, and flexure strip axle sleeve 8 is fixed on the centre of rotating shaft 7;

The elastic roller assembly comprises that ball 3, ball rotating shaft 4, bracing frame 5, flexure strip 6 form, described ball rotating shaft 4 is placed on bracing frame 5 and forms a fixed connection, ball 3 also can freely rotate through ball rotating shaft 4, flexure strip 6 one ends and bracing frame 5 are fastenedly connected, the other end and flexure strip axle sleeve 8 are fastenedly connected, and guarantee that ball 3 keeps in touch with piezoelectricity circle 2 all the time;

Piezoelectricity circle 2 is surrounded by flexible piezo-electricity composite material, and is fixed on box body 1 inner ring, and piezoelectricity circle 2 keeps in touch with ball 3 all the time.

The ball 3 of piezoelectric generating device of the present invention, bracing frame 5, flexure strip 6 quantity are identical, are more than two; Wherein flexure strip 6 can be selected different-stiffness according to the varying environment flow rate, can reach the certain adjustable precompression of piezoelectricity circle 2.

The turbine rotor assembly rotates under the fluid force effect in environment, drives ball 3 through flexure strip 6 and rolls on piezoelectricity circle 2 inner cylinder faces, makes piezoelectric unit bear cycle pressure, and output charge, realize the conversion of fluid dynamic energy to electric energy.

Turbo blade 9 of the present invention is the kinetic energy that rotating shaft 7 is rotated by the kinetic transformation of air or current, thereby drives the rotation of flexure strip axle sleeve 8.Because flexure strip 6 one ends and bracing frame 5 are fastenedly connected, the other end and flexure strip axle sleeve 8 are fastenedly connected, thereby drive the rotation of elastic roller assembly.Because flexure strip 6 itself has certain precompression, make ball 3 contact with piezoelectricity circle 2 all the time, and certain extruding force is arranged, ball 3 itself is freely to rotate around ball rotating shaft 4, so just can greatly reduce rotary resistance.When the each rotation of rotating shaft 7 drives the rotation of elastic roller assembly, will under flexure strip 6 resilient force, make ball 3 constantly squeeze the electric circle 2 of bruising, the positive-effect characteristic by piezoelectric, will continue to produce electric energy.

Claims (2)

1. a Reed-type piezoelectric generating device, is characterized in that: turbine rotor assembly, elastic roller assembly, piezoelectricity circle, consist of; Described turbine rotor assembly consists of rotating shaft (7), the turbo blade (9) that is fixed on rotating shaft (7) one ends, the flexure strip axle sleeve (8) that is fixed on the centre of rotating shaft (7);
Described elastic roller assembly consists of ball (3), ball rotating shaft (4), bracing frame (5), flexure strip (6); Wherein ball (3) is installed in bracing frame (5) by ball rotating shaft (4), and can rotate along ball rotating shaft (4); Flexure strip (6) one ends and bracing frame (5) are fastenedly connected, and the other end and flexure strip axle sleeve (8) are fastenedly connected; Described elastic roller assembly surpasses 2 groups, and symmetrical;
Described piezoelectricity circle (2) is made by piezoelectric, is divided into some piezoelectric units, mutually insulated, and be fixed on box body (1) inner ring; The flexure strip of elastic roller assembly (6) makes ball (3) remain and contact with piezoelectricity circle (2), during the rotation of elastic roller assembly, ball (3) produces pressure to piezoelectricity circle (2), the piezoelectric unit of alternating action on the piezoelectricity circle, force each piezoelectric unit of piezoelectricity circle (2) alternately to produce electric charge output, obtain electric energy.
2. the electricity-generating method of Reed-type piezoelectric generating device according to claim 1, it is characterized in that: the turbine rotor assembly rotates under the fluid force effect in environment, drive ball (3) through flexure strip (6) rolls on piezoelectricity circle (2) inner cylinder face, make piezoelectric unit bear cycle pressure, output charge, realize the conversion of fluid dynamic energy to electric energy.
CN201310365861.5A 2013-08-21 2013-08-21 Reed-type piezoelectric generating device and method CN103490667B (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN201310365861.5A CN103490667B (en) 2013-08-21 2013-08-21 Reed-type piezoelectric generating device and method

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CN103490667A true CN103490667A (en) 2014-01-01
CN103490667B CN103490667B (en) 2015-09-09

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106100443A (en) * 2016-06-15 2016-11-09 浙江师范大学 A kind of self-luminous Warning light of bicycle
WO2017139554A1 (en) * 2016-02-12 2017-08-17 Analog Devices, Inc. Piezoelectric energy harvester for human motion
US10069441B2 (en) 2015-10-21 2018-09-04 Analog Devices, Inc. Electric energy scavenger device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09103083A (en) * 1995-10-03 1997-04-15 Jiro Isobe Piezoelectric motor
JP2008503992A (en) * 2004-06-17 2008-02-07 アダプティブエナジー・リミテッド・ライアビリティー・カンパニーAdaptivenergy Llc Piezoelectric generator and method of operating the same
US20100052324A1 (en) * 2005-10-18 2010-03-04 Board Of Regents, The University Of Texas System Piezoelectric windmill apparatus
CN102647112A (en) * 2012-05-07 2012-08-22 哈尔滨工业大学 Rotary piezoelectric power generator
CN102946211A (en) * 2012-11-21 2013-02-27 南京航空航天大学 Voltage-adjustable piezoelectric power generation device
CN203457079U (en) * 2013-08-21 2014-02-26 南京航空航天大学 Elastic plate type piezoelectric power generation device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09103083A (en) * 1995-10-03 1997-04-15 Jiro Isobe Piezoelectric motor
JP2008503992A (en) * 2004-06-17 2008-02-07 アダプティブエナジー・リミテッド・ライアビリティー・カンパニーAdaptivenergy Llc Piezoelectric generator and method of operating the same
US20100052324A1 (en) * 2005-10-18 2010-03-04 Board Of Regents, The University Of Texas System Piezoelectric windmill apparatus
CN102647112A (en) * 2012-05-07 2012-08-22 哈尔滨工业大学 Rotary piezoelectric power generator
CN102946211A (en) * 2012-11-21 2013-02-27 南京航空航天大学 Voltage-adjustable piezoelectric power generation device
CN203457079U (en) * 2013-08-21 2014-02-26 南京航空航天大学 Elastic plate type piezoelectric power generation device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10069441B2 (en) 2015-10-21 2018-09-04 Analog Devices, Inc. Electric energy scavenger device
WO2017139554A1 (en) * 2016-02-12 2017-08-17 Analog Devices, Inc. Piezoelectric energy harvester for human motion
US10536098B2 (en) 2016-02-12 2020-01-14 Analog Devices, Inc. Piezoelectric energy harvester for human motion
CN106100443A (en) * 2016-06-15 2016-11-09 浙江师范大学 A kind of self-luminous Warning light of bicycle

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