CN204704094U - A kind of swinging vibrator of piezoelectric pump - Google Patents
A kind of swinging vibrator of piezoelectric pump Download PDFInfo
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- CN204704094U CN204704094U CN201520470167.4U CN201520470167U CN204704094U CN 204704094 U CN204704094 U CN 204704094U CN 201520470167 U CN201520470167 U CN 201520470167U CN 204704094 U CN204704094 U CN 204704094U
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Abstract
The utility model discloses a kind of swinging vibrator of piezoelectric pump, include flexible matrix and be fixedly connected on the piezoelectric ceramic of matrix, direction perpendicular to connection piezoelectric ceramic surface is connected with clamped to described matrix, and the barycenter of swinging vibrator is positioned on the axis of clamped; The polarised direction of described piezoelectric ceramic is mutually vertical with direction of an electric field, and the polarised direction of piezoelectric ceramic and direction of an electric field all with the axis perpendicular of clamped.Because the utility model uses bionics principle, clamped is arranged on the center of mass of swinging vibrator, under the effect of outside electric field excitation, the larger end amplitude of oscillation can be obtained.Extra electric field direction and polarised direction arranged perpendicular, make piezoelectric ceramic directly produce bending, and scheme compared to existing technology improves energy conversion efficiency, improves the ability of pumping fluid.
Description
Technical field
The utility model belongs to field of fluid machinery, and be specifically related to a kind of biomimetic type Valveless piezoelectric pump pump oscillator, particularly one imitates fish swinging vibrator.
Background technique
Have no-trump piezoelectric pump to be divided into have valve piezoelectric pump and Valveless piezoelectric pump according to pump valve.Have the working principle of valve piezoelectric pump to be briefly stated as, the double vibrations of piezoelectric vibrator causes the cyclically-varying of pump chamber, and the change of volume causes the change of pump chamber internal pressure, controls the opening and closing of pump valve.Because tradition has the amplitude of valve piezoelectric pump piezoelectric vibrator very little, the flow limiting pump and the back pressure that can bear.Chinese patent application CN101608611A proposes a kind of large discharge utilizing piezoelectric stack to drive valve piezoelectric pump, but the problem such as this piezoelectric pump still also exists pump valve low-response, the frequent switch of pump valve exists fretting wear, complex structure, life-span are low.Chinese patent CN201010175866.8 utilizes the dilatation of piezoelectric stack to encourage swinging vibrator, is amplified by the amplitude of second order lever to swinging vibrator, forms fluid drive function at the end sticking flexible tail fin of oscillator.Piezoelectric material and body material are made of one by U. S. Patent 20070090726A1, are caused the flexural oscillations of piezoelectric material by the flex effect of piezoelectric material, and driving fluid (air) flows, and form fanning effect.Sensor integration in oscillator, to control the amplitude of vibration, is obtained suitable air quantity by US Patent No. 20090026881Al.US Patent No. 20150023819A1 is by placed side by side for three piezoelectric bimorphs, and middle piezoelectric bimorph is contrary with the swaying phase on both sides, to improve the ability that it drives air
Chinese patent CN201010175866.8 utilizes the dilatation of piezoelectric stack to drive swinging vibrator vibration, and complex structure, is unfavorable for the microminaturization of structure; U. S. Patent 20070090726A1, US20090026881Al, US20150023819A1 utilize the dilatation of piezoelectric material be converted to bending deflection and produce swing, structure is simple, be easy to microminaturization, but there are the following problems: (one) oscillator is all the mode (as shown in Figure 1) adopting one end clamped, frequency of okperation is higher, and the noise of generation is larger; (2) distortion of piezoelectric material is converted to swinging vibrator swing through stretching to diastrophic conversion (as shown in Figure 2), will have the loss of energy, reducing electromechanical conversion efficiency in transfer process.
Summary of the invention
Technical problem to be solved in the utility model is: the deficiency existed for prior art, provides a kind of frequency of okperation low, and end amplitude of fluctuation is large, the swinging vibrator of the piezoelectric pump that pumping fluid ability is strong
For realizing the object of the utility model, be achieved by the following technical solutions: a kind of swinging vibrator of piezoelectric pump, include flexible matrix and be fixedly connected on two piezoelectric ceramics of matrix upper and lower surface, direction perpendicular to connection piezoelectric ceramic surface is connected with clamped to described matrix, and the barycenter of swinging vibrator is positioned on the axis of clamped; The polarised direction of described piezoelectric ceramic is mutually vertical with direction of an electric field, and the polarised direction of piezoelectric ceramic and direction of an electric field all with the axis perpendicular of clamped.
Preferably: the polarised direction of two described piezoelectric ceramics is vertical with the thickness direction of piezoelectric ceramic, and the polarised direction of two piezoelectric ceramics is contrary; Two piezoelectric ceramics are electric field junction surface perpendicular to two apparent surfaces of thickness direction, and two piezoelectric ceramics are electrically connected towards the electric field junction surface of matrix with matrix.
Preferably: described clamped is flexible strut.
As another kind of preferred version: the polarised direction of two described piezoelectric ceramics is identical with the thickness direction of piezoelectric ceramic, and the polarised direction of two piezoelectric ceramics is identical; Two piezoelectric ceramics are parallel to two apparent surfaces of thickness direction for electric field junction surface.
Preferably: described clamped is torsion spring.
Preferably: described matrix is connected with flexible tail fin perpendicular to the end of clamped.
Compared with prior art, the beneficial effects of the utility model are: can be found by the travelling behavior observing fish, the minimum position of amplitude of fluctuation is at its barycenter place, therefore the present invention uses with bionics principle, clamped is arranged on the center of mass of swinging vibrator, under the effect of outside electric field excitation, the larger end amplitude of oscillation can be obtained, correspondingly can reduce frequency of okperation like this, reduce dithering noise; By extra electric field direction and polarised direction arranged perpendicular, piezoelectric ceramic is directly produced bending, when in alternative prior art, direction of an electric field is identical with polarised direction, piezoelectric ceramic is through stretching to diastrophic conversion, therefore scheme compared to existing technology improves energy conversion efficiency, improve the ability of pumping fluid.
Accompanying drawing explanation
Fig. 1 is the clamped mode schematic diagram of the swinging vibrator of prior art.
Fig. 2 be the piezoelectric ceramic of prior art swinging vibrator by dilatation to diastrophic transition status structural representation.
Fig. 3 is the view of fish swimming.
Fig. 4 utilizes the mode of connection schematic diagram of the swinging vibrator of piezoelectric constant D15 effect.
Fig. 5 is the structural representation of embodiment 1 swinging vibrator.
Fig. 6 is the plane structure schematic diagram of embodiment 1 swinging vibrator.
Fig. 7 is the left view of Fig. 6.
Fig. 8 is the structural representation of embodiment 2 swinging vibrator.
Fig. 9 is the plane structure schematic diagram of embodiment 2 swinging vibrator.
Figure 10 is the left view of Fig. 9.
Figure 11 is the structural representation of embodiment 3 swinging vibrator.
Figure 12 is the plane structure schematic diagram of embodiment 3 swinging vibrator.
Figure 13 is the left view of Figure 12.
Figure 14 is the structural representation of embodiment 4 swinging vibrator.
Figure 15 is the plane structure schematic diagram of embodiment 4 swinging vibrator.
Figure 16 is the left view of Figure 15.
Figure 17 is the structural representation of embodiment 5 swinging vibrator.
Figure 18 is the plane structure schematic diagram of embodiment 5 swinging vibrator.
Figure 19 is the left view of Figure 18.
Embodiment
With reference to the accompanying drawings embodiment of the present utility model is made a detailed explanation below.
as shown in Figure 3,can be found by the travelling behavior observing fish, the minimum position of amplitude of fluctuation is at its barycenter place, and therefore the present invention uses with bionics principle, clamped is arranged on the center of mass of swinging vibrator, under the effect of outside electric field excitation, the larger end amplitude of oscillation can be obtained.Separately as shown in Figure 4, by extra electric field direction and polarised direction arranged perpendicular, piezoelectric ceramic is directly produced bending, when in alternative prior art, direction of an electric field is identical with polarised direction, piezoelectric ceramic is through stretching to diastrophic conversion, therefore scheme compared to existing technology improves energy conversion efficiency, improve the ability of pumping fluid.
embodiment 1
According to shown in Fig. 5 to Fig. 7, the present embodiment is a kind of swinging vibrator of piezoelectric pump, include flexible matrix 2 and be fixedly connected on two piezoelectric ceramics 1 of matrix upper and lower surface, direction perpendicular to connection piezoelectric ceramic surface is connected with clamped to described matrix, and clamped is flexible strut 4; And the barycenter of swinging vibrator is positioned on the axis of clamped; The polarised direction of described piezoelectric ceramic is mutually vertical with direction of an electric field, and the polarised direction of piezoelectric ceramic and direction of an electric field all with the axis perpendicular of clamped.
The polarised direction of two described piezoelectric ceramics is vertical with the thickness direction of piezoelectric ceramic, and the polarised direction of two piezoelectric ceramics contrary (shown in Fig. 5 the direction of arrow); Two piezoelectric ceramics are electric field junction surface perpendicular to two apparent surfaces of thickness direction, and two piezoelectric ceramics are electrically connected towards the electric field junction surface of matrix with matrix.Shown in composition graphs 5, the electric field junction surface of upper and lower two piezoelectric ceramics connects a pole of ac power supply, and matrix connects another pole of ac power supply.
Described matrix is connected with flexible tail fin 3 perpendicular to the end of clamped.
Under the action of alternative electric field that ac power supply produces, swinging vibrator will produce with strut 4 as axle swings vibration.Owing to producing the more conventional D31 effect of the piezoelectric constant D15 effect of shear deformation numerically large (D31 effect as shown in Figure 2), therefore under oscillator same structure parameter, oscillator will produce larger wobble amplitude; Because this anamorphic effect has shearing strain directly to produce, namely piezoelectric ceramic directly produces bending under electric field action, avoids and changes bending process into by flexible, improve electromechanical conversion efficiency; At barycenter, place is clamped, reduces the frequency of okperation obtaining maximum electromechanical conversion efficiency, obtains larger end amplitude.
embodiment 2
According to shown in Fig. 8 to Figure 10, the present embodiment is a kind of swinging vibrator of piezoelectric pump, include flexible matrix 2 and be fixedly connected on two piezoelectric ceramics 1 of matrix upper and lower surface, the direction perpendicular to connection piezoelectric ceramic surface is connected with clamped to described matrix, and clamped is torsion spring 5; And the barycenter of swinging vibrator is positioned on the axis of clamped; The polarised direction of described piezoelectric ceramic is mutually vertical with direction of an electric field, and the polarised direction of piezoelectric ceramic and direction of an electric field all with the axis perpendicular of clamped.
The cross section of described torsion spring 5 can be uniform section, and also can be variable cross section, best structure be variable cross section, and torsion spring bore strengthens to the other end gradually by connecting matrix one end.
The polarised direction of two described piezoelectric ceramics is identical with the thickness direction of piezoelectric ceramic, and the polarised direction of two piezoelectric ceramics identical (as shown by the arrows in figure 8); Two piezoelectric ceramics are parallel to two apparent surfaces of thickness direction for electric field junction surface.Shown in composition graphs 9, the electric field junction surface of upper and lower two piezoelectric ceramic left and right sides connects the two poles of the earth of ac power supply respectively.
Described matrix is connected with flexible tail fin 3 perpendicular to the end of clamped.
Under the action of alternative electric field that ac power supply produces, swinging vibrator will produce with torsion spring 5 as axle swings vibration.Owing to producing the more conventional D31 effect of the D15 effect of shear deformation numerically large (D31 effect as shown in Figure 2), therefore under oscillator same structure parameter, oscillator will produce larger wobble amplitude; Because this anamorphic effect has the shearing strain of piezoelectric ceramic directly to produce, avoid and change bending process into by flexible, improve electromechanical conversion efficiency; At barycenter, place is clamped, and using the less torsion spring of torsional stiffness as the parts bearing torsion, reduces the frequency of okperation obtaining maximum electromechanical conversion efficiency, obtain larger end amplitude.
embodiment 3
According to shown in Figure 11 to Figure 13, the present embodiment is a kind of swinging vibrator of piezoelectric pump, include flexible matrix 2 and be fixedly connected on a piezoelectric ceramic 1 of matrix upper or lower surface, direction perpendicular to connection piezoelectric ceramic surface is connected with clamped to described matrix, and clamped is flexible strut 4; And the barycenter of swinging vibrator is positioned on the axis of clamped; The polarised direction of described piezoelectric ceramic is mutually vertical with direction of an electric field, and the polarised direction of piezoelectric ceramic and direction of an electric field all with the axis perpendicular of clamped.
The polarised direction of described piezoelectric ceramic is alongst, vertical with the thickness direction of piezoelectric ceramic, the direction of arrow as shown in figure 11; Piezoelectric ceramic is electric field junction surface perpendicular to two apparent surfaces of thickness direction, and piezoelectric ceramic is electrically connected towards the electric field junction surface of matrix with matrix.Shown in Figure 11, the electric field junction surface of piezoelectric ceramic connects a pole of ac power supply, and matrix connects another pole of ac power supply.
Described matrix is connected with flexible tail fin 3 perpendicular to the end of clamped.
Under the action of alternative electric field that ac power supply produces, swinging vibrator will produce with strut 4 to be axle swing is vibrated.Owing to producing the more conventional D31 effect of the piezoelectric constant D15 effect of shear deformation numerically large (D31 effect as shown in Figure 2), therefore under oscillator same structure parameter, oscillator will produce larger wobble amplitude; Because this anamorphic effect has shearing strain directly to produce, namely piezoelectric ceramic directly produces bending under electric field action, avoids and changes bending process into by flexible, improve electromechanical conversion efficiency; At barycenter, place is clamped, reduces the frequency of okperation obtaining maximum electromechanical conversion efficiency, obtains larger end amplitude.
embodiment 4
According to shown in Figure 14 to Figure 16, the present embodiment is a kind of swinging vibrator of piezoelectric pump, include flexible matrix 2 and be fixedly connected on many groups piezoelectric ceramic of matrix upper and lower surface that (the present embodiment is 2 groups, can many groups be had), direction perpendicular to connection piezoelectric ceramic surface is connected with clamped to described matrix, and clamped is flexible strut 4; And the barycenter of swinging vibrator is positioned on the axis of clamped; The polarised direction of described piezoelectric constant chip arrays is mutually vertical with direction of an electric field, and the polarised direction of piezoelectric ceramic and direction of an electric field all with the axis perpendicular of clamped.
The polarised direction of described piezoelectric constant chip arrays is vertical with the thickness direction of piezoelectric ceramic, and the polarised direction of two piezoelectric ceramics contrary (shown in Figure 14 the direction of arrow); Piezoelectric ceramic is electric field junction surface perpendicular to two apparent surfaces of thickness direction, and piezoelectric ceramic is electrically connected towards the electric field junction surface of matrix with matrix.Shown in Figure 14, the electric field junction surface of upper and lower piezoelectric ceramic connects a pole of ac power supply, and matrix connects another pole of ac power supply.
Described matrix is connected with flexible tail fin 3 perpendicular to the end of clamped.
Under the action of alternative electric field that ac power supply produces, swinging vibrator will produce with strut 4 as axle swings vibration.Owing to producing the more conventional D31 effect of the piezoelectric constant D15 effect of shear deformation numerically large (D31 effect as shown in Figure 2), therefore under oscillator same structure parameter, oscillator will produce larger wobble amplitude; Because this anamorphic effect has shearing strain directly to produce, namely piezoelectric ceramic directly produces bending under electric field action, avoids and changes bending process into by flexible, improve electromechanical conversion efficiency; At barycenter, place is clamped, reduces the frequency of okperation obtaining maximum electromechanical conversion efficiency, obtains larger end amplitude.
embodiment 5
According to shown in Figure 17 to Figure 19, the present embodiment is a kind of swinging vibrator of piezoelectric pump, include flexible matrix 2 and be fixedly connected on many groups piezoelectric ceramic of matrix upper and lower surface that (the present embodiment is 2 groups, can many groups be had), direction perpendicular to connection piezoelectric ceramic surface is connected with clamped to described matrix, and clamped is flexible torsion spring 5; And the barycenter of swinging vibrator is positioned on the axis of clamped; The polarised direction of described piezoelectric ceramic is mutually vertical with direction of an electric field, and the polarised direction of piezoelectric ceramic and direction of an electric field all with the axis perpendicular of clamped.
The polarised direction of two described piezoelectric ceramics is vertical with the thickness direction of piezoelectric ceramic, and the polarised direction of two piezoelectric ceramics contrary (shown in Fig. 5 the direction of arrow); Two piezoelectric ceramics are electric field junction surface perpendicular to two apparent surfaces of thickness direction, and two piezoelectric ceramics are electrically connected towards the electric field junction surface of matrix with matrix.Shown in Figure 17, the electric field junction surface of piezoelectric constant chip arrays connects a pole of ac power supply, and matrix connects another pole of ac power supply.
Described matrix is connected with flexible tail fin 3 perpendicular to the end of clamped.
Under the action of alternative electric field that ac power supply produces, swinging vibrator will produce with torsion spring 5 center line to be axle swing is vibrated.Owing to producing the more conventional D31 effect of the piezoelectric constant D15 effect of shear deformation numerically large (D31 effect as shown in Figure 2), therefore under oscillator same structure parameter, oscillator will produce larger wobble amplitude; Because this anamorphic effect has shearing strain directly to produce, namely piezoelectric ceramic directly produces bending under electric field action, avoids and changes bending process into by flexible, improve electromechanical conversion efficiency; At barycenter, place is clamped, reduces the frequency of okperation obtaining maximum electromechanical conversion efficiency, obtains larger end amplitude.
Claims (6)
1. the swinging vibrator of a piezoelectric pump, it is characterized in that: include flexible matrix and be fixedly connected on the piezoelectric ceramic of matrix surface, direction perpendicular to connection piezoelectric ceramic surface is connected with clamped to described matrix, and the barycenter of swinging vibrator is positioned on the axis of clamped; The polarised direction of described piezoelectric ceramic is mutually vertical with direction of an electric field, and the polarised direction of piezoelectric ceramic and direction of an electric field all with the axis perpendicular of clamped.
2. the swinging vibrator of a kind of piezoelectric pump according to claim 1, it is characterized in that: the polarised direction of described piezoelectric ceramic is vertical with the thickness direction of piezoelectric ceramic, and the polarised direction of two piezoelectric ceramics is contrary; Two piezoelectric ceramics are electric field junction surface perpendicular to two apparent surfaces of thickness direction, and two piezoelectric ceramics are electrically connected towards the electric field junction surface of matrix with the matrix of conductive material.
3. the swinging vibrator of a kind of piezoelectric pump according to claim 2, is characterized in that: described clamped is flexible strut.
4. the swinging vibrator of a kind of piezoelectric pump according to claim 1, it is characterized in that: the polarised direction of two described piezoelectric ceramics is identical with the thickness direction of piezoelectric ceramic, and the polarised direction of two piezoelectric ceramics is identical; Two piezoelectric ceramics are parallel to two apparent surfaces of thickness direction for electric field junction surface.
5. the swinging vibrator of a kind of piezoelectric pump according to claim 4, is characterized in that: described clamped is torsion spring.
6. the swinging vibrator of a kind of piezoelectric pump according to claim 1, is characterized in that: described matrix is connected with flexible tail fin perpendicular to the end of clamped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520470167.4U CN204704094U (en) | 2015-06-30 | 2015-06-30 | A kind of swinging vibrator of piezoelectric pump |
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| CN201520470167.4U CN204704094U (en) | 2015-06-30 | 2015-06-30 | A kind of swinging vibrator of piezoelectric pump |
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| CN204704094U true CN204704094U (en) | 2015-10-14 |
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| CN201520470167.4U Expired - Fee Related CN204704094U (en) | 2015-06-30 | 2015-06-30 | A kind of swinging vibrator of piezoelectric pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963834A (en) * | 2015-06-30 | 2015-10-07 | 丽水学院 | Oscillating vibrator of piezoelectric pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963834A (en) * | 2015-06-30 | 2015-10-07 | 丽水学院 | Oscillating vibrator of piezoelectric pump |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151014 Termination date: 20170630 |
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| CF01 | Termination of patent right due to non-payment of annual fee |