CN104481860A - Valveless piezoelectric pump of staggered annular flow pipe - Google Patents
Valveless piezoelectric pump of staggered annular flow pipe Download PDFInfo
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- CN104481860A CN104481860A CN201410533056.3A CN201410533056A CN104481860A CN 104481860 A CN104481860 A CN 104481860A CN 201410533056 A CN201410533056 A CN 201410533056A CN 104481860 A CN104481860 A CN 104481860A
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Abstract
The invention discloses a valveless piezoelectric pump of a staggered annular flow pipe, and belongs to the field of fluid machinery. The pump is characterized in that surfaces with same polarity of two circular piezoelectric vibrators (2) are oppositely arranged on a pump body (3), wherein a cavity between the two circular piezoelectric vibrators (2) is a pump cavity (1); the pump body (3) is connected to the staggered annular flow pipe (5) from a through hole (4) in a side face; an equator line (7) on one side of the center of circle O1 of the staggered annular flow pipe (5) is cambered; the pipe is concentric with the circular pump cavity (1) at the center of circle O1 after being assembled and is positioned in the plane parallel to the piezoelectric vibrators (2) and penetrating through the axis (8) of the side hole (4); an outer equator line (6) of the staggered annular flow pipe (5) is a circular arc line and is also positioned in the plane parallel to the piezoelectric vibrators (2) and penetrating through the axis (8) of the side hole (4), but the center of circle O2 is on a straight line which passes through the point O1 to be perpendicular to the axis (8) and has an offset distance L with O1; the staggered annular flow pipe (5) is provided with three fluid outlet and inlet openings. According to the pump, only one flow guide pipe is used for realizing unidirectional flow of fluid, and the pump has broad potential application in micro-electromechanical systems.
Description
Technical field
The present invention relates to a kind of Valveless piezoelectric pump, belong to field of fluid machinery.
Background technique
Valveless piezoelectric pump structure is simple, and mechanical Transmitted chains, reliability is high, and electromechanical conversion efficiency is high, easy microminaturization, and in health care, Aero-Space, have a wide range of applications in MEMS.
Summary of the invention
Fig. 1 is the structural drawing of Valveless piezoelectric pump of the present invention.
Wrong thimble shape stream pipe Valveless piezoelectric pump, it is characterized in that: the face of two circular piezoelectric vibrator (2) identical polars is mounted opposite on the pump housing (3), cavity between two circular piezoelectric vibrators (2) is pump chamber (1), and the pump housing (3) is connected to wrong thimble shape by the through hole (4) of side and flows on pipe (5);
Be circular arc at the equatorial line (7) of the O1 side, the center of circle of wrong thimble shape stream pipe (5), be concentric with O1 with circular pump chamber (1) after mounting and be positioned at parallel with piezoelectric vibrator (2) and by the plane of side opening (4) axis (8); The outside equatorial line (6) of wrong thimble shape stream pipe (5) is circular arc line, also be positioned at and be parallel to piezoelectric vibrator (2) and by the plane of the axis (8) of side opening (4), but center of circle O2 is on the straight line vertical with axis (8) by O1 point, and have offset distance L with O1, meet 0<L<R2-R1, R2 is the radius of outside equatorial line (6), and R1 is the radius of inner side equatorial line (7); Wrong thimble shape stream pipe (5) has 3 stream sockets, wherein the first gateway (9) and the second gateway (10) connect with extraneous pipeline, and the 3rd gateway (11) connects with the through hole (4) on the pump housing (3) and coaxial.
The working principle of the curved guide groove Valveless piezoelectric pump that the present invention proposes is described below:
Two circular piezoelectric vibrators (2) are bonded on two counterbores (12) of the end face of the pump housing (3) respectively with the one side that polarity is identical; Wrong thimble shape stream pipe (5) is arranged on the through hole (4) of the pump housing (3) side; Be circular arc at the equatorial line (7) of the O1 side, the center of circle of wrong thimble shape stream pipe (5), be concentric with O1 with circular pump chamber (1) after mounting and be positioned at parallel with piezoelectric vibrator (2) and by the plane of side opening (4) axis (8); The outside equatorial line (6) of wrong thimble shape stream pipe (5) is circular arc line, also be positioned at and be parallel to piezoelectric vibrator (2) and by the plane of the axis (8) of side opening (4), but center of circle O2 is on the straight line vertical with axis (8) by O1 point, and have offset distance L with O1, meet 0<L<R2-R1, R2 is the radius of outside equatorial line (6), and R1 is the radius of inner side equatorial line (7); Wrong thimble shape stream pipe (5) has 3 stream sockets, wherein the first gateway (9) and the second gateway (10) connect with extraneous pipeline, and the 3rd gateway (11) connects with the through hole (4) on the pump housing (3) and coaxial.
Further, in wrong thimble shape stream pipe (5), the axis (15) being positioned at the 3rd gateway (11) has V-arrangement flow distribution plate (14), and its V-arrangement is symmetrical about axis (15), and the 3rd gateway (11) is pointed in the bottom of V-arrangement.
The present invention uses wrong thimble shape stream pipe (5) to achieve only just can make fluid generation one-way flow with a honeycomb duct, simplify the structure that traditional Valveless piezoelectric pump must install two honeycomb ducts, make Valveless piezoelectric pump can microminaturization more, there is potential use widely in MEMS.
Accompanying drawing explanation
Fig. 1 (a) wrong thimble shape stream pipe Valveless piezoelectric pump erection drawing plan view;
Fig. 1 (b) wrong thimble shape stream pipe Valveless piezoelectric pump erection drawing plan view;
Fig. 2 (a) pump housing (3) B-B sectional view;
Fig. 2 (b) pump housing (3) plan view;
Wrong thimble shape stream pipe (5) of Fig. 3.
Embodiment
The specific embodiment of the invention is as Fig. 1-Fig. 3.Piezoelectric vibrator diameter 30mm, the cross section of wrong thimble shape stream pipe (5) is circular; Generatrix radius 31.5mm, outside generatrix radius 36.5mm inside wrong thimble shape stream pipe, offset distance L is 2.5mm, operating voltage 220V, frequency 50Hz, and be working medium with water, flow reaches 1540mg/s.
Owing to there is offset distance L so the internal diameter of the first gateway (9) is greater than the internal diameter of the second gateway (10); When piezoelectric pump incoming transport power supply, when inhaling journey, two piezoelectric vibrators (2) are in a halftime of Ac, respectively to pump chamber (1) outer lateral bend, pump chamber (1) internal pressure declines, fluid manages the first gateway (9) and the second gateway (10) inflow of (5) from wrong thimble shape stream, and through the 3rd gateway (11), side opening (4) flows into pump chamber (1); When Ac changes pressure direction, when entering the next halftime, piezoelectric pump enters the scheduling stage, two piezoelectric vibrators (2) are respectively to pump chamber (1) interior lateral bend, pump chamber (1) volume declines, pressure raises, and the fluid via through holes (4) in pump chamber (1) and the 3rd gateway (11) flow into wrong thimble shape stream pipe (5), and flow out the first gateway (9) and the second gateway (10); Internal diameter due to first gateway (9) of wrong thimble shape stream pipe (5) is greater than the internal diameter of the second gateway (10), therefore within a pump work cycle, all there is the influx of fluid and the difference of discharge in the first gateway (9) and the second gateway (10), according to the principle of continuity of fluid flowing, the discharge that the influx difference of the first gateway (9) should equal the second gateway (10) is poor, thus produces net flow; Under the alternating voltage repeated action of Ac, pump macroscopically create fluid from the first gateway (9) flow into, from the net flow that the second gateway (10) flow out.
Claims (2)
1. wrong thimble shape stream pipe Valveless piezoelectric pump, it is characterized in that: the face of two circular piezoelectric vibrator (2) identical polars is mounted opposite on the pump housing (3), cavity between two circular piezoelectric vibrators (2) is pump chamber (1), and the pump housing (3) is connected to wrong thimble shape by the through hole (4) of side and flows on pipe (5);
Be circular arc at the equatorial line (7) of the O1 side, the center of circle of wrong thimble shape stream pipe (5), be concentric with O1 with circular pump chamber (1) after mounting and be positioned at parallel with piezoelectric vibrator (2) and by the plane of side opening (4) axis (8); The outside equatorial line (6) of wrong thimble shape stream pipe (5) is circular arc line, also be positioned at and be parallel to piezoelectric vibrator (2) and by the plane of the axis (8) of side opening (4), but center of circle O2 is on the straight line vertical with axis (8) by O1 point, and have offset distance L with O1, meet 0<L<R2-R1, R2 is the radius of outside equatorial line (6), and R1 is the radius of inner side equatorial line (7); Wrong thimble shape stream pipe (5) has 3 stream sockets, wherein the first gateway (9) and the second gateway (10) connect with extraneous pipeline, and the 3rd gateway (11) connects with the through hole (4) on the pump housing (3) and coaxial.
2. wrong thimble shape stream pipe Valveless piezoelectric pump according to claim 1, it is characterized in that:, in wrong thimble shape stream pipe (5), the axis (15) being positioned at the 3rd gateway (11) there is V-arrangement flow distribution plate (14), its V-arrangement is symmetrical about axis (15), and the 3rd gateway (11) is pointed in the bottom of V-arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410533056.3A CN104481860B (en) | 2014-10-11 | Wrong thimble shape flow tube Valveless piezoelectric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410533056.3A CN104481860B (en) | 2014-10-11 | Wrong thimble shape flow tube Valveless piezoelectric pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104481860A true CN104481860A (en) | 2015-04-01 |
| CN104481860B CN104481860B (en) | 2017-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604920A (en) * | 2016-01-12 | 2016-05-25 | 北京联合大学 | Side suction pipe valveless piezoelectric pump |
| CN105673462A (en) * | 2016-01-21 | 2016-06-15 | 北京联合大学 | Side-suction pipe liquid mixing and conveying valve-less piezoelectric pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1331538A1 (en) * | 2002-01-26 | 2003-07-30 | Eppendorf Ag | Piezo-electrically controlled micro actuator for fluids |
| US20060186761A1 (en) * | 2003-11-26 | 2006-08-24 | The Penn State Research Foundation | IDT electroded piezoelectric diaphragms |
| CN1948754A (en) * | 2006-11-14 | 2007-04-18 | 北京工业大学 | Built in rotable multiblock valve less piezoelectric pump |
| JP2008291674A (en) * | 2007-05-22 | 2008-12-04 | Alps Electric Co Ltd | Method for manufacturing piezoelectric vibrator |
| CN102155389A (en) * | 2011-05-30 | 2011-08-17 | 浙江师范大学 | Valveless piezoelectric pump with asymmetrical runners |
| CN102913422A (en) * | 2012-10-18 | 2013-02-06 | 南京航空航天大学 | Drag-reducing valveless piezoelectric pump with drag-reducing fluids |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1331538A1 (en) * | 2002-01-26 | 2003-07-30 | Eppendorf Ag | Piezo-electrically controlled micro actuator for fluids |
| US20060186761A1 (en) * | 2003-11-26 | 2006-08-24 | The Penn State Research Foundation | IDT electroded piezoelectric diaphragms |
| CN1948754A (en) * | 2006-11-14 | 2007-04-18 | 北京工业大学 | Built in rotable multiblock valve less piezoelectric pump |
| JP2008291674A (en) * | 2007-05-22 | 2008-12-04 | Alps Electric Co Ltd | Method for manufacturing piezoelectric vibrator |
| CN102155389A (en) * | 2011-05-30 | 2011-08-17 | 浙江师范大学 | Valveless piezoelectric pump with asymmetrical runners |
| CN102913422A (en) * | 2012-10-18 | 2013-02-06 | 南京航空航天大学 | Drag-reducing valveless piezoelectric pump with drag-reducing fluids |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604920A (en) * | 2016-01-12 | 2016-05-25 | 北京联合大学 | Side suction pipe valveless piezoelectric pump |
| CN105673462A (en) * | 2016-01-21 | 2016-06-15 | 北京联合大学 | Side-suction pipe liquid mixing and conveying valve-less piezoelectric pump |
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