CN201682431U - Sandwich-type cone piezoelectric driving and power generation integrated device - Google Patents
Sandwich-type cone piezoelectric driving and power generation integrated device Download PDFInfo
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- CN201682431U CN201682431U CN2009202014427U CN200920201442U CN201682431U CN 201682431 U CN201682431 U CN 201682431U CN 2009202014427 U CN2009202014427 U CN 2009202014427U CN 200920201442 U CN200920201442 U CN 200920201442U CN 201682431 U CN201682431 U CN 201682431U
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- conical surface
- piezoelectric
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- ceramic piece
- generating
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Abstract
The utility model discloses a sandwich-type cone piezoelectric driving and power generation integrated device. Due to the adoption of a sandwich-type cone piezoelectric vibrator, the contact surface between the piezoelectric vibrator and a rotor is a cone. Therefore, the matching degree of the static bending between the piezoelectric vibrator and the rotor is improved, the contact area is increased, the energy conversion efficiency of the motor is enhanced, the output performance is greatly improved and the running noise is small. When in piezoelectric power generation, the energy density is large, the environment is clean and pollution-free and the ideal green energy is regarded.
Description
Technical field
The utility model relates to a kind of Piezoelectric Driving and the integrated device of piezo-electric generating, relates in particular to a kind of sandwich conical surface piezoelectric and drives and generating integration device.
Background technology
Piezoelectric ceramic just has, inverse piezoelectric effect, is widely used in the MEMS (micro electro mechanical system) (MEMS).Based on little driving of piezoelectric effect and little energy technology is two key areas in the MEMS theory and application research, also is the key that realizes the MEMS design.In recent years, the develop rapidly of MEMS integrated technology is that little driving and little energy integrated researched and proposed more stern challenge.In addition, China is being faced with energy shortage and the serious present situation of environmental pollution, and this has seriously restricted the sustainable development of national economy.Therefore, the MEMS of development high integration and clean energy-saving type is very urgent.
The utility model content
The purpose of this utility model is at the deficiencies in the prior art, provides a kind of sandwich conical surface piezoelectric to drive and generating integration device; The utility model realizes that Piezoelectric Driving and electricity generate function are in one, improve the static buckling cooperate degree between piezoelectric vibrator and the rotor, increase rotor contact area, improve the energy transfer efficiency and the energy index of device, provide that a kind of energy density is big, the green energy resource of cleanliness without any pollution.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of sandwich conical surface piezoelectric drives and generating integration device, the sandwich conical surface piezoelectric oscillator is installed on the base by four hold-down screws on its pedestal, conical surface rotor is housed on the conical surface of sandwich conical surface piezoelectric oscillator, conical surface rotor is fastenedly connected by hold-down screw and output shaft and is integral, conical surface rotor outside is provided with thrust bearing, regulates the trip bolt hole by four on end cap and the base (1) and is fixed on above the base.The excitation piezoelectric ceramic piece of sandwich conical surface piezoelectric oscillator is under the effect of 90 high-frequency excitation signal sources of spending and high frequency power amplifier at the two-way phase difference, make the conical surface of piezoelectric vibrator produce refracted traveling wave, and promote conical surface rotor by the effect of conical surface friction power and rotate, realize driving function; The generating piezoelectric ceramic piece of sandwich conical surface piezoelectric oscillator produces induced charge under the effect of flexural vibrations, can power to external loading behind rectification transformating circuit and memory circuit, realizes electricity generate function.
Further, the complex that described sandwich conical surface piezoelectric oscillator is made up of metallic elastic body, exciting piezoelectric ceramic piece and generating piezoelectric ceramic piece, the generating piezoelectric ceramic piece is positioned at the top of piezoelectric vibrator, the metallic elastic body is positioned at the middle part of piezoelectric vibrator, the exciting piezoelectric ceramic piece is positioned at the bottom of piezoelectric vibrator, and generating piezoelectric ceramic piece, metallic elastic body and exciting piezoelectric ceramic piece pass through to constitute the sandwich piezoelectric vibrator behind bonding and the hot setting; The metallic elastic surface of piezoelectric vibrator has 1 stator tooth every 4 degree, and the medial surface of stator tooth is the conical surface, and the form of teeth groove is the outer shallow oblique teeth groove of the interior rafter teeth groove of rafter teeth groove of piezoelectric vibrator.
Further, described precompression governor motion is regulated trip bolt hole, end cap, thrust bearing, conical surface rotor, acrylonitrile-butadiene rubber ring and sandwich conical surface piezoelectric oscillator composition for four that are followed successively by on the base.
Further, the radial location mechanism of described output shaft is journal bearing and the composition of the thrust bearing on the end cap on the base; The axial location mechanism of output shaft is made of jointly sandwich conical surface piezoelectric oscillator, thrust bearing and end cap successively.
The beneficial effect that the utlity model has is:
1, adopt sandwich conical surface piezoelectric oscillator form, the static buckling cooperate degree between piezoelectric vibrator and the rotor improves, and contact area increases, and the motor power conversion efficiency improves, and output performance improves greatly.
2, adopt sandwich conical surface piezoelectric oscillator form, can realize that Piezoelectric Driving and generating are integrated in one, not only increase the multifunction of device, overcome the single defective of conventional piezoelectric device function, also simplify the complexity of apparatus structure greatly, reduced the processing and manufacturing cost.
3, adopt sandwich conical surface piezoelectric oscillator form, can realize that low-speed and large-torque directly drives, do not need to be equipped with reducing gear, and do not produce running noises; The energy density that piezo-electric generating produces is big, and cleanliness without any pollution is the ideal green energy.
4, the conical surface piezoelectric oscillator is opened the helical teeth groove, helps improving the consistency of oscillator conical surface particle vibration displacement, improves operation stability, reaches the reduction noise effects.
5, in addition, helical teeth groove structure can also make the maximum shear stress that glue-line is subjected between piezoelectric vibrator and the exciting piezoelectric ceramic piece move to the oscillator center, avoided the oscillator edge stress concentration phenomenon to occur, guaranteed that glue-line is subjected to uniform shear stress, improves the useful life of device greatly.
6, the integrated device of the utility model Piezoelectric Driving and piezo-electric generating is with a wide range of applications, and not only can be applied among the MEMS, also is widely used in fields such as Aero-Space, accurate apparatus, biologic medical, robot.
Description of drawings
Fig. 1 is that the utility model sandwich conical surface piezoelectric drives and the generating integration device structural representation;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is a sandwich conical surface piezoelectric oscillator schematic diagram;
Fig. 4 is the vertical view of Fig. 3;
Fig. 5 is a conical surface rotor cutaway view;
Among the figure: 1, base, 2, the sandwich conical surface piezoelectric oscillator, 3, conical surface rotor, 4, the acrylonitrile-butadiene rubber ring, 5, end cap, 6, thrust bearing, 7, output shaft, 8, hold-down screw, 9, regulate trip bolt, 10, hold-down screw, 11, journal bearing, 12, high-frequency excitation signal source, 13, high frequency power amplifier, 14, rectification transformating circuit, 15, memory circuit, 16, load, 21, the exciting piezoelectric ceramic piece, 22, metallic elastic body, 23, the generating piezoelectric ceramic piece, 24, stator tooth.
Embodiment
The sandwich conical surface piezoelectric oscillator is housed on the utility model device pedestal, conical surface rotor is housed on the conical surface of sandwich piezoelectric vibrator, conical surface rotor is fastenedly connected by hold-down screw and output shaft and is integral, the rotor outside is provided with thrust bearing, regulates the trip bolt hole by four on end cap and the base and is fixed on the base.Apply the two-way high-frequency excitation signal that phase difference is 90 degree for the exciting piezoelectric patches, piezoelectric vibrator will produce refracted traveling wave at the conical surface, and the rotor that promotes on the conical surface by the conical surface friction effect rotates, and realize driving function; The generating piezoelectric patches produces flexural deformation under the effect of refracted traveling wave, and produces induced charge on its surface, and the induced charge that produces can be realized electricity generate function to external electric after rectifying conversion, storage.
The complex that described sandwich conical surface piezoelectric oscillator is made up of metallic elastic body, exciting piezoelectric ceramic piece and generating piezoelectric ceramic piece, the generating piezoelectric ceramic piece is positioned at the top of piezoelectric vibrator, the metallic elastic body is positioned at the middle part of piezoelectric vibrator, the exciting piezoelectric ceramic piece is positioned at the bottom of piezoelectric vibrator, and generating piezoelectric ceramic piece, metallic elastic body and exciting piezoelectric ceramic piece pass through to constitute the sandwich piezoelectric vibrator behind bonding and the hot setting; The metallic elastic surface of piezoelectric vibrator has 1 stator tooth every 4 degree, the medial surface of stator tooth is the conical surface, the form of teeth groove is the outer shallow oblique teeth groove of the interior rafter teeth groove of rafter teeth groove of piezoelectric vibrator, the effect of teeth groove is the vibration amplitude of amplification piezoelectric oscillator, improves the energy index and the power index of device.
Described precompression governor motion is regulated trip bolt, end cap, thrust bearing, conical surface rotor, acrylonitrile-butadiene rubber ring and sandwich conical surface piezoelectric oscillator by four on the base successively and is formed.Regulate trip bolt by regulating four, the gap between end cap and base reduces, and pressure increases, and pressure passes to thrust bearing, conical surface awl, acrylonitrile-butadiene rubber ring successively by end cap, passes to the sandwich conical surface piezoelectric oscillator at last.
Described output shaft radial location mechanism is made up of journal bearing on the base and the thrust bearing on the end cap; The axial location mechanism of output shaft is made of jointly sandwich conical surface piezoelectric oscillator, thrust bearing and end cap successively.
Described high-frequency excitation signal source is the FLUKE29 type function generator of U.S. Fiuke Co., Ltd, high frequency power amplifier is the ML3860B type high frequency power amplifier that Yangzhou state electricity is raised news telecommunication Instr Ltd., rectification transformating circuit is made up of the bridge rectifier KBPC510 of Shanghai Liu Jing Electronics Co., Ltd and the MAX1811 of Maxim company, and the store electricity routing capacity is that 3 farads super capacitor is formed.
Describe the utility model in detail with embodiment with reference to the accompanying drawings below, it is more obvious that the purpose of this utility model and effect will become.
As shown in Figure 1, 2, sandwich conical surface piezoelectric of the present utility model drives and generating integration device, comprising: base 1, sandwich conical surface piezoelectric oscillator 2, conical surface rotor 3, acrylonitrile-butadiene rubber ring 4, end cap 5, output shaft 7, high frequency power amplifier 13, rectification transformating circuit 14, memory circuit 15.Base 1 is fixedly linked with end cap 5, sandwich conical surface piezoelectric oscillator 2 is installed on the base 1 by four hold-down screws 10 on its pedestal, conical surface rotor 3 is housed on the conical surface of sandwich conical surface piezoelectric oscillator 2, conical surface rotor 3 surface bonding acrylonitrile-butadiene rubber rings 4 and be fastenedly connected by hold-down screw 8 and output shaft 7 are integral, and output shaft 7 is installed on the central through hole of end cap 5 and base 1 by thrust bearing 6 and journal bearing 11.High-frequency excitation signal source 12 links to each other with high frequency power amplifier 13, and high frequency power amplifier 13 links to each other with exciting piezoelectric ceramic piece 21.After linking to each other with memory circuit 15, rectification transformating circuit 14 links to each other with generating piezoelectric ceramic piece 23.
The radial location mechanism of output shaft 7 is that journal bearing 11 and the thrust bearing on the end cap 56 on the base 1 formed; The axial location mechanism of output shaft 7 is made of jointly sandwich conical surface piezoelectric oscillator 2, thrust bearing 6 and end cap 5 successively.
Shown in Fig. 3,4, sandwich conical surface piezoelectric oscillator 2 mainly is made up of exciting piezoelectric ceramic piece 21, metallic elastic body 22, generating piezoelectric ceramic piece 23 and stator tooth 24.Exciting piezoelectric ceramic piece 21 is positioned at the bottom, metallic elastic body 22 is positioned at the middle part, generating piezoelectric ceramic piece 23 is positioned at the top, exciting piezoelectric ceramic piece 21, metallic elastic body 22 and generating piezoelectric ceramic piece 23 link to each other successively, by forming sandwich structure behind bonding and the hot setting, metallic elastic body 22 inboards are the conical surface, the surface has 1 stator tooth 24 every 4 degree, the form of teeth groove is the stator outward flange teeth groove oblique teeth groove shallow than the inward flange teeth groove, be used for the vibration amplitude of amplification piezoelectric oscillator, improve the energy index and the power index of device.
The excitation piezoelectric ceramic piece 21 of sandwich conical surface piezoelectric oscillator 2 is under the effect of 90 high-frequency excitation signals 12 of spending and high frequency power amplifier 13 at the two-way phase difference, make the conical surface of piezoelectric vibrator 2 produce refracted traveling wave, and promote conical surface rotor 3 by the effect of conical surface friction power and rotate, realize driving function; The generating piezoelectric ceramic piece 23 of sandwich conical surface piezoelectric oscillator 2 produces induced charge under the effect of flexural vibrations, can realize electricity generate function to external loading 16 power supplies behind rectification transformating circuit 14 and memory circuit 15.
On performance, adopt sandwich conical surface piezoelectric oscillator 2 to cooperate with conical surface rotor 3 when driving, because the acting in conjunction of the conical surface and helical teeth groove, the uniformity and the consistency of oscillator conical surface particle vibration amplitude have been improved, radially static buckling cooperate degree and contact area between oscillator and the rotor have been increased, thereby motor properties is greatly enhanced, and its conversion efficiency also is increased dramatically.In addition, take on exciting and generating effect respectively owing to adopt two piezoelectric ceramic pieces in the sandwich type structural, make whole device on function, be expanded with integrated, realized that first Piezoelectric Driving and two kinds of functions of generating are integrated, and piezo-electric generating to have energy density big, advantages such as cleanliness without any pollution.Finite element analysis shows, adopts near the model frequency of sandwich conical surface piezoelectric oscillator operating frequency to differ bigger, and mode is very clear, is not easy to occur the mode aliasing, also just is not prone to noise.The sandwich conical surface piezoelectric oscillator mode (B that obtains developing through FEM (finite element) calculation
09) frequency is 57.347kHz, its adjacent model frequency is respectively 55.322kHz and 60.068kHz, and generated output can reach 55mW under the complete matching status of load.
Claims (3)
1. a sandwich conical surface piezoelectric drives and generating integration device, it is characterized in that, sandwich conical surface piezoelectric oscillator (2) is installed on the base (1) by four hold-down screws (10) on its pedestal, conical surface rotor (3) is housed on the conical surface of sandwich conical surface piezoelectric oscillator (2), conical surface rotor (3) is fastenedly connected by hold-down screw (8) and output shaft (7) and is integral, conical surface rotor (3) outside is provided with thrust bearing (6), regulates trip bolt hole (8) by four on end cap (5) and the base (1) and is fixed on above the base (1).
2. sandwich conical surface piezoelectric according to claim 1 drives and generating integration device, it is characterized in that: described sandwich conical surface piezoelectric oscillator (2) is by metallic elastic body (22), the complex that exciting piezoelectric ceramic piece (21) and generating piezoelectric ceramic piece (23) are formed, generating piezoelectric ceramic piece (23) is positioned at the top of piezoelectric vibrator (2), metallic elastic body (22) is positioned at the middle part of piezoelectric vibrator (2), exciting piezoelectric ceramic piece (21) is positioned at the bottom of piezoelectric vibrator (2), generating piezoelectric ceramic piece (23), metallic elastic body (22) and exciting piezoelectric ceramic piece (21) pass through to constitute the sandwich piezoelectric vibrator behind bonding and the hot setting; Metallic elastic body (22) surface of piezoelectric vibrator (2) has 1 stator tooth (24) every 4 degree, and the medial surface of stator tooth (24) is the conical surface, and the form of teeth groove is the outer shallow oblique teeth groove of the interior rafter teeth groove of rafter teeth groove of piezoelectric vibrator.
3. sandwich conical surface piezoelectric according to claim 1 drives and generating integration device, it is characterized in that: the radial location mechanism of described output shaft (7) is that journal bearing (11) and the thrust bearing (6) on the end cap (5) on the base (1) formed; The axial location mechanism of output shaft (7) is made of jointly sandwich conical surface piezoelectric oscillator (2), thrust bearing (6) and end cap (5) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202014427U CN201682431U (en) | 2009-11-30 | 2009-11-30 | Sandwich-type cone piezoelectric driving and power generation integrated device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202014427U CN201682431U (en) | 2009-11-30 | 2009-11-30 | Sandwich-type cone piezoelectric driving and power generation integrated device |
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| CN201682431U true CN201682431U (en) | 2010-12-22 |
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| CN2009202014427U Expired - Fee Related CN201682431U (en) | 2009-11-30 | 2009-11-30 | Sandwich-type cone piezoelectric driving and power generation integrated device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937137A (en) * | 2012-11-20 | 2013-02-20 | 浙江大学 | Piezoelectric power generation rolling bearing unit |
| CN105656349A (en) * | 2016-03-17 | 2016-06-08 | 浙江工商大学 | Piezoelectric ultrasonic vibration energy collector |
-
2009
- 2009-11-30 CN CN2009202014427U patent/CN201682431U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937137A (en) * | 2012-11-20 | 2013-02-20 | 浙江大学 | Piezoelectric power generation rolling bearing unit |
| CN102937137B (en) * | 2012-11-20 | 2015-01-14 | 浙江大学 | Piezoelectric power generation rolling bearing unit |
| CN105656349A (en) * | 2016-03-17 | 2016-06-08 | 浙江工商大学 | Piezoelectric ultrasonic vibration energy collector |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20121130 |