CN103956935A - Piezoelectric power generation device and power generation method thereof - Google Patents

Piezoelectric power generation device and power generation method thereof Download PDF

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Publication number
CN103956935A
CN103956935A CN201410168478.5A CN201410168478A CN103956935A CN 103956935 A CN103956935 A CN 103956935A CN 201410168478 A CN201410168478 A CN 201410168478A CN 103956935 A CN103956935 A CN 103956935A
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China
Prior art keywords
spring
box
piezoelectric
axle
mounting cylinder
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CN201410168478.5A
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Chinese (zh)
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CN103956935B (en
Inventor
杨颖�
沈钦龙
金家楣
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南京航空航天大学
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Abstract

The invention discloses a piezoelectric power generation device and a power generation method thereof, and belongs to the field of wind power generation and hydroelectric generation. The piezoelectric power generation device comprises a turbine rotor assembly, a spring ball assembly and a piezoelectric vibrator assembly, wherein the turbine rotor assembly comprises a box cover, a box body, a left shaft, a right shaft, a turbine blade and a main shaft frame, the left shaft and the right shaft are fixedly connected with the box cover and the box body respectively, the turbine blade is fixed to the left end of the left shaft, and the left shaft and the right shaft are arranged on the main shaft frame; the spring ball assembly comprises an installation cylinder, a spring and an elastic ball, the installation cylinder is installed on the box body, one end of the spring is fixedly arranged in the installation cylinder, the other end of the spring is in a free state, the elastic ball is arranged at the end, in the free state, of the spring, the end, extending into the box body, of the installation cylinder is open, the end, outside of the box body, of the installation cylinder is sealed, and the end, in the free state, of the spring is located at the open end of the installation cylinder; the piezoelectric vibrator assembly comprises an elastic piece and a piezoelectric material attached to the elastic piece in an adhesive mode, one end of the elastic piece is embedded in the outer cylindrical face of the box body, the other end of the elastic piece is free, and the elastic piece makes contact with the elastic piece after moving in the axis direction of the installation cylinder.

Description

A kind of piezoelectric generating device and electricity-generating method thereof

Technical field:

The present invention relates to a kind of piezoelectric generating device and electricity-generating method thereof, it belongs to wind power generation and hydroelectric power generation field.

Background technology:

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

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 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, in the time that wind speed is lower, blade and cam can not depart from, and piezoelectric bimorph keeps certain case of bending constant, now no longer generating.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 the rolling by being placed in 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 mark rotation producing can utilize automobile to cross time.Steel ball is arranged in the circular passage being separated into by component of piezoelectric conversion, and when mark is rotated, steel ball will move in passage, clashes into the piezoelectric element at passage two ends, makes piezoelectric element output charge.The major defect of this scheme is, when car crosses and mark will high speed rotating while producing strong wind continuously, thereby makes steel ball be close to 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 invention provides a kind of piezoelectric generating device efficient, applied widely and electricity-generating method thereof that utilizes piezoelectric to collect fluid dynamic energy.

The present invention adopts following technical scheme: a kind of piezoelectric generating device, by turbine rotor assembly, spring ball assembly, piezoelectric vibrator module composition, described turbine rotor assembly comprise form the lid of piezoelectric generating device main body and box body, respectively form a fixed connection with lid and box body left axle and right axle, be fixed on the turbo blade of described left shaft end, left axle and right axle arranged to main shaft frame thereon by bearing;

Described spring ball assembly comprises mounting cylinder, one end of being mounted on box body be fixed on the other end in the mounting cylinder spring that is free state, elastic ball that is arranged on spring free state end, described mounting cylinder stretches into the end opening in box body, output is in the sealing of outside one end, and one end that described spring is free state is positioned at the openend of mounting cylinder;

Described piezoelectric vibrator assembly comprises flexure strip and is pasted on the piezoelectric on flexure strip, one end of described flexure strip is embedded on the external cylindrical surface of box body, the other end is freely to form cantilever beam structure, and described elastic ball contacts with described flexure strip after mounting cylinder axis direction moves.

Described elastic ball quantity is not less than 1.

The present invention also adopts following technical scheme: a kind of electricity-generating method of piezoelectric generating device, it comprises the steps:

1). turbo blade is left axle and the moving kinetic energy of natural pivot by the kinetic transformation of air or current, then drives lid and box body to rotate by left axle and right axle;

2). perpendicular to the ground upwards time when being fixed on mounting cylinder openend in piezoelectric generating device main body, elastic ball is at Action of Gravity Field lower compression spring;

3). while being rotated further, spring starts to extend and promote elastic ball, when mounting cylinder openend perpendicular to the ground when downward, elastic ball under elastic force and self gravitation effect, move downward rapidly and impact elasticity sheet on a certain position, thereby generation impact energy, output electric energy.

The present invention has following beneficial effect:

(1). utilize mounting cylinder restriction elastic ball to move at mounting cylinder axis direction, thereby the position that can guarantee each percussive pressure electric tachometer indicator, by regulating impact position, force piezoelectric vibrator under natural frequency, to vibrate, and produces more large amplitude and energy;

(2). when main body often rotates a circle, capital produces elastic ball to spring-compressed, and spring is to elastic ball elastic force, and elastic ball will impact piezoelectric vibrator under self gravitation and elastic force double action like this, produce more impact energy from sending out, and better improve the output of piezoelectric vibrator electric energy.

Brief description of the drawings:

Fig. 1 is the general assembly front view of piezoelectric generating device of the present invention.

Fig. 2 is the partial structurtes Fig. 2 (a) of piezoelectric generating device shown in Fig. 1 and partial structurtes cutaway view 2 (b), 2 (c).Wherein:

1-lid; 2-box body; 3-mounting cylinder; 4-elastic ball; 5-spring; 6-piezoelectric; 7-flexure strip; 8-turbo blade; The left axle of 9-; The right axle of 10-; 11-main shaft frame.

Embodiment:

Below in conjunction with accompanying drawing, the present invention is described in further detail.

Please refer to shown in Fig. 1 and Fig. 2, piezoelectric generating device of the present invention, by turbine rotor assembly, spring ball assembly, piezoelectric vibrator module composition, described turbine rotor assembly comprises that turbo blade 8, left axle 9, right axle 10, lid 1 and box body 2 form, lid 1 and box body 2 form this apparatus main body, rotating shaft is divided into left axle 9 and right axle 10, and form a fixed connection with lid 1 and the box body 2 of main body respectively, turbo blade 8 is fixed on wherein one end of left axle 9, and rotating shaft arranges on main shaft frame 11 by bearing, and rotate.

Spring ball assembly comprises that mounting cylinder 3, spring 5 and elastic ball 4 form, wherein mounting cylinder 3 stretch in box body 2 for opening, output is sealing outside, spring 5 one end are fixed in mounting cylinder 3, the other end becomes free state, and elastic ball 4 is arranged on spring 5, and energy free movement, the quantity of piezoelectric generating device Elastic ball 4 of the present invention is not less than 1, and wherein mounting cylinder 3 is fixed on main body box body 2.

Piezoelectric vibrator assembly is made up of piezoelectric 6 and flexure strip 7, and piezoelectric 6 is pasted on flexure strip 7, and one end of flexure strip 7 is embedded on the external cylindrical surface of box body 2, and is screwed, and the other end freely, forms cantilever beam structure.Wherein elastic ball 4 contacts with flexure strip 7 after mounting cylinder 3 axis directions move.

The electricity-generating method of piezoelectric generating device of the present invention is: turbo blade 8 is the kinetic energy that rotating shaft is rotated by the kinetic transformation of air or current, then drives main body (lid 1 and box body 2) to rotate by rotating shaft 9; Perpendicular to the ground upwards time when being fixed on mounting cylinder 3 openends in main body, elastic ball 4 is at Action of Gravity Field lower compression spring 5; In the time being rotated further, spring 5 starts to extend and promotes elastic ball 4; When mounting cylinder 3 openends perpendicular to the ground when downward, elastic ball 4 under elastic force and self gravitation effect, move downward rapidly and percussive pressure electric tachometer indicator assembly (flexure strip 7) on a certain position, and because mounting cylinder 3 has limited elastic ball 4 arbitrary motions, elastic ball 4 can only be moved at mounting cylinder 3 axis directions, thereby ensure that each impact position is basically identical, so just can better regulate, determine and excite piezoelectric vibrator natural frequency, make piezoelectric vibrator reach peak swing, the highest electric energy of output.

The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, can also make under the premise without departing from the principles of the invention some improvement, and these improve and also should be considered as protection scope of the present invention.

Claims (3)

1. a piezoelectric generating device, it is characterized in that: by turbine rotor assembly, spring ball assembly, piezoelectric vibrator module composition, described turbine rotor assembly comprise form the lid (1) of piezoelectric generating device main body and box body (2), respectively form a fixed connection with lid (1) and box body (2) left axle (9) and right axle (10), be fixed on the turbo blade (8) of described left axle (9) end, left axle (9) and right axle (10) arranged to main shaft frame (11) thereon by bearing;
Described spring ball assembly comprises mounting cylinder (3), one end of being mounted on box body (2) be fixed on the interior other end of mounting cylinder (3) spring (5) that is free state, elastic ball (4) that is arranged on spring free state end, described mounting cylinder (3) stretches into the end opening in box body (2), output is in the sealing of outside one end, and one end that described spring (5) is free state is positioned at the openend of mounting cylinder (3);
Described piezoelectric vibrator assembly comprises flexure strip (7) and is pasted on the piezoelectric (6) on flexure strip (7), one end of described flexure strip (7) is embedded on the external cylindrical surface of box body (2), the other end is freely to form cantilever beam structure, and described elastic ball (4) contacts with described flexure strip (7) after mounting cylinder (3) axis direction moves.
2. piezoelectric generating device as claimed in claim 1, is characterized in that: described elastic ball (4) quantity is not less than 1.
3. an electricity-generating method for piezoelectric generating device as claimed in claim 2, is characterized in that: comprise the steps
1). turbo blade (8) is the kinetic energy that left axle (9) and right axle (10) rotate by the kinetic transformation of air or current, then drives lid (1) and box body (2) to rotate by left axle (9) and right axle (10);
2). perpendicular to the ground upwards time when being fixed on mounting cylinder (3) openend in piezoelectric generating device main body, elastic ball (4) is at Action of Gravity Field lower compression spring (5);
3). while being rotated further, spring (5) starts to extend and promotes elastic ball (4), when mounting cylinder (3) openend perpendicular to the ground when downward, elastic ball (4) under elastic force and self gravitation effect, move downward rapidly and impact elasticity sheet (7) on a certain position, thereby generation impact energy, output electric energy.
CN201410168478.5A 2014-04-24 2014-04-24 Piezoelectric power generation device and power generation method thereof CN103956935B (en)

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CN103956935B CN103956935B (en) 2017-05-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104481789B (en) * 2014-09-15 2017-02-15 浙江师范大学 Structure design for dielectric elastomer electric generator utilizing tidal energy
CN107425753A (en) * 2017-08-28 2017-12-01 北京工业大学 Speed-increasing type wind power piezoelectric generation device
CN107465362A (en) * 2017-09-21 2017-12-12 北京工业大学 A kind of symmetrical lever wind energy trap setting

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Publication number Priority date Publication date Assignee Title
JP2004282915A (en) * 2003-03-17 2004-10-07 Nec Tokin Corp Piezoelectric generator, light emitting device, and delineator light
JP2005237156A (en) * 2004-02-23 2005-09-02 Taiheiyo Cement Corp Power generating device and system
CN201174668Y (en) * 2008-03-18 2008-12-31 杭州电子科技大学 Impact type piezoelectric power generator
US20090315431A1 (en) * 2008-06-19 2009-12-24 Omnitek Partners Llc Electrical generators for low-frequency and time-varying rocking and rotary motion
CN103312216A (en) * 2013-06-06 2013-09-18 中山大学 Fluid piezoelectric power generation assembly and assembly set
JP5320650B1 (en) * 2012-11-30 2013-10-23 浩平 速水 Power generation system
CN203313087U (en) * 2013-03-12 2013-11-27 张平 Sea wave and wind power generation device
CN203896220U (en) * 2014-04-24 2014-10-22 南京航空航天大学 Piezoelectric generating set

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004282915A (en) * 2003-03-17 2004-10-07 Nec Tokin Corp Piezoelectric generator, light emitting device, and delineator light
JP2005237156A (en) * 2004-02-23 2005-09-02 Taiheiyo Cement Corp Power generating device and system
CN201174668Y (en) * 2008-03-18 2008-12-31 杭州电子科技大学 Impact type piezoelectric power generator
US20090315431A1 (en) * 2008-06-19 2009-12-24 Omnitek Partners Llc Electrical generators for low-frequency and time-varying rocking and rotary motion
JP5320650B1 (en) * 2012-11-30 2013-10-23 浩平 速水 Power generation system
CN203313087U (en) * 2013-03-12 2013-11-27 张平 Sea wave and wind power generation device
CN103312216A (en) * 2013-06-06 2013-09-18 中山大学 Fluid piezoelectric power generation assembly and assembly set
CN203896220U (en) * 2014-04-24 2014-10-22 南京航空航天大学 Piezoelectric generating set

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104481789B (en) * 2014-09-15 2017-02-15 浙江师范大学 Structure design for dielectric elastomer electric generator utilizing tidal energy
CN107425753A (en) * 2017-08-28 2017-12-01 北京工业大学 Speed-increasing type wind power piezoelectric generation device
CN107425753B (en) * 2017-08-28 2019-02-26 北京工业大学 Speed-increasing type wind power piezoelectric generation device
CN107465362A (en) * 2017-09-21 2017-12-12 北京工业大学 A kind of symmetrical lever wind energy trap setting
CN107465362B (en) * 2017-09-21 2019-02-26 北京工业大学 A kind of symmetrical lever wind energy trap setting

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