CN103644101B - A kind of double-cavity parallel conical pipe Valveless piezoelectric pump - Google Patents
A kind of double-cavity parallel conical pipe Valveless piezoelectric pump Download PDFInfo
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- CN103644101B CN103644101B CN201310555216.XA CN201310555216A CN103644101B CN 103644101 B CN103644101 B CN 103644101B CN 201310555216 A CN201310555216 A CN 201310555216A CN 103644101 B CN103644101 B CN 103644101B
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- pump
- taper pipe
- lower half
- pump chamber
- chamber lower
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Abstract
The present invention discloses a kind of double-cavity parallel conical pipe Valveless piezoelectric pump, pump cover, the pump housing and pump seat are from top to bottom combined by bonding or binder, pump cover is provided with two the pump chamber upper half part in left and right, the pump housing is established upper half part of two the pump chamber lower half portions in left and right, the Taper Pipe of four same structure sizes, outlet plenum, former and later two snout cavity upper half part and liquidate chamber and outer pipe; The large end of first, second Taper Pipe is communicated with outlet plenum, and the small end of the first Taper Pipe is communicated with left pump chamber lower half portion, and the center line of the first Taper Pipe is through the center of left pump chamber lower half portion; The small end of the second Taper Pipe is communicated with right pump chamber lower half portion, and the center line of the second Taper Pipe is through the center of right pump chamber lower half portion; Three, the small end of the 4th Taper Pipe is all communicated with the chamber that liquidates, and the large end of the 3rd Taper Pipe is communicated with right pump chamber lower half portion, and the large end of the 4th Taper Pipe is communicated with left pump chamber lower half portion, the centerline collineation of two pump chamber lower half portions and the 3rd, the 4th Taper Pipe; Be easy to microminiaturized, flow is high.
Description
Technical field
The present invention relates to Micro Fluid Transfer and control and micro mechanical technology field, refer in particular to a kind of two-chamber valveless piezoelectric pump based on wall-attached jet.
Background technique
Piezoelectric pump is the one of mechanical type Micropump, belongs to displacement pump, is widely used in that medicine trace transports, the cooling of cell separation, electronic product (as CPU), the injection of fuel trace, chemical microanalysis, Flows transfer twist the fields such as control.According to or without valve structure, piezoelectric pump can be divided into and have valve piezoelectric pump and Valveless piezoelectric pump two class.Valveless piezoelectric pump does not have one-way valve structures, and processing is simple, be easy to microminiaturized, and flowing medium can not be cut off because of valve arrangement, avoids some sensitive medias to be affected.Most of Valveless piezoelectric pump structure is connected with pump chamber by two special construction stream pipes, and the differences in flow resistance utilizing special construction stream pipe different direction to flow produces pumping effect, and common special construction stream pipe has conical pipe, tesla pipe, three-way pipe etc.Because the differences in flow resistance of special construction stream pipe is little, cause the flow of the type Valveless piezoelectric pump lower.In order to improve Micropump flow, parallel-connection structure is used to improve in conical pipe Valveless piezoelectric pump performance.
Summary of the invention
The present invention is directed to the low problem of existing Valveless piezoelectric pump duty, propose a kind of double-cavity parallel conical pipe Valveless piezoelectric pump of high flow capacity.
The technical solution used in the present invention is: pump cover, the pump housing and pump seat are from top to bottom combined by bonding or binder, two piezoelectricity shake and are fixed on pump cover, pump cover is provided with two the pump chamber upper half part in left and right, the pump housing is established upper half part of two the pump chamber lower half portions in left and right, the Taper Pipe of four same structure sizes, outlet plenum, former and later two snout cavity upper half part and liquidate chamber and outer pipe; The large end of first, second Taper Pipe is communicated with outlet plenum, and the small end of the first Taper Pipe is communicated with left pump chamber lower half portion, and the center line of the first Taper Pipe is through the center of left pump chamber lower half portion; The small end of the second Taper Pipe is communicated with right pump chamber lower half portion, and the center line of the second Taper Pipe is through the center of right pump chamber lower half portion; Three, the small end of the 4th Taper Pipe is all communicated with the chamber that liquidates, and the large end of the 3rd Taper Pipe is communicated with right pump chamber lower half portion, and the large end of the 4th Taper Pipe is communicated with left pump chamber lower half portion, the centerline collineation of two pump chamber lower half portions and the 3rd, the 4th Taper Pipe.
The invention has the beneficial effects as follows: structure is simple, be easy to microminiaturized, flow is high.
Accompanying drawing explanation
Fig. 1 is the main sectional view of structure of the present invention;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is A-A sectional drawing in Fig. 1;
Fig. 4 is B-B sectional drawing in Fig. 2;
Fig. 5 is I partial enlarged drawing in Fig. 3;
Fig. 6 is discharge process fundamental diagram of the present invention;
Fig. 7 is I local flow situation map in discharge process;
Fig. 8 is suction process fundamental diagram of the present invention;
Fig. 9 is suction process I local flow situation map.
In figure: 1,4. piezoelectric vibrator; 2,5. pump chamber upper half part; 3. pump cover; 6. the pump housing; 7,11. pump chamber lower half portions; 8. snout cavity lower half portion; 9. inlet tube; 10. pump seat; 12,15,18,20. conical pipes; 13. outer pipes; 14. outlet plenums; 16,19. snout cavity upper half part; 17. liquidate chamber.
Embodiment
As shown in Fig. 1,2,3,4,5, the present invention includes two piezoelectric vibrators 1,4, pump cover 3, the pump housing 6 and pump seat 10.Pump cover 3, the pump housing 6 and pump seat 10 are from top to bottom combined by bonding or binder, and two piezoelectric vibrators 1,4 are fixed on pump cover 3 by binder.Pump cover 3 is processed with two the pump chamber upper half part 2,5 in left and right.The pump housing 6 is processed with the Taper Pipe 12,15,18,20 of left and right two pump chamber lower half portions 7,11, four same structure sizes, upper half part of outlet plenum 14, former and later two snout cavity upper half part 16,19 and liquidate chamber 17 and outer pipe 13.Pump seat 10 is processed with lower half portion of snout cavity lower half portion 8, inlet tube 9 and outer pipe 13.
First Taper Pipe 12 and the 4th Taper Pipe 20 are communicated with pump chamber lower half portion 11 and two Taper Pipes are mutually vertical.Second Taper Pipe 15 and the 3rd Taper Pipe 18 are communicated with pump chamber lower half portion 7 and two Taper Pipes are also mutually vertical.3rd Taper Pipe 18 and the 4th Taper Pipe 20 are all communicated with the chamber 17 that liquidates and two Taper Pipe axis are in same level position.Liquidate chamber 17 two ends respectively with former and later two snout cavity upper half part 16,19 UNICOMs.First Taper Pipe 12 is communicated with outlet plenum 14 with the second Taper Pipe 15.
During concrete connection, the first Taper Pipe 12 is communicated with outlet plenum 14 with the large end of the second Taper Pipe 15, and the small end of the first Taper Pipe 12 is communicated with pump chamber lower half portion 11, and the center line of the first Taper Pipe 12 is through the center of pump chamber lower half portion 11.The small end of the second Taper Pipe 15 is communicated with pump chamber lower half portion 7, and the second Taper Pipe 15 center line through the center of pump chamber lower half portion 7.The large end that 3rd Taper Pipe 18 and the small end of the 4th Taper Pipe 20 are all communicated with large end connection pump chamber lower half portion the 7, four Taper Pipe 20 of chamber the 17, three Taper Pipe 18 that liquidates is communicated with pump chamber lower half portion 11.The centerline collineation of pump chamber lower half portion the 7,11 and the 3rd, the 4th Taper Pipe 18,20.
The span affecting the main structure parameters of piezoelectric pump performance is: four Taper Pipe 12,15,18,20 smallest cross-sectional place width
ait is 50 μm to 300 μm; Four Taper Pipe 12,15,18,20 length are smallest cross-sectional place width
a10 times to 20 times; Taper Pipe 12,15,18,20 cone angle
θit is 5 ° to 15 °; Four Taper Pipe 12,15,18,20 round-corner transition radiuses
rfor smallest cross-sectional place width
a1 times to 2 times; Liquidate the left and right width in chamber 17
bit is four Taper Pipes 12,15,18,20 smallest cross-sectional place width
a3 times to 10 times; Liquidate the anterior-posterior length in chamber 17
cfor width
b4 times to 8 times.Two pump chamber lower half portions, 7,11, four Taper Pipes 12,15,18,20, the chamber 17 that liquidates, outlet plenum 14 the degree of depth
hbe four Taper Pipes 12,15,18,20 length be smallest cross-sectional place width
a1 times to 2 times.
When the present invention works, the alternating voltage loading same phase respectively makes two piezoelectric vibrators 1,4 that the identical synchronous vibration of amplitude occur.
Piezoelectric vibrator 1,4 is discharged pump chamber to fluid during bottom offset, is discharge process.In pump, mobility status as shown in Figure 6,7, and a part of fluid from pump chamber lower half portion 7,11 flows into outlet plenum 14 through Taper Pipe 12,15, and is discharged by outer pipe 13.Now Taper Pipe 12,15 is diffusing tube, and discharge flow rate is comparatively large, and its single stream pipe flow is
; Another part fluid from pump chamber lower half portion 7,11 flows into through Taper Pipe 18,20 chamber 17 that liquidates, and through snout cavity upper half part 16,19, snout cavity lower half portion 8, is finally discharged by inlet tube 9.Now Taper Pipe 18,20 is collapsible tube, and discharge flow rate is less, and two strands of jets that two Taper Pipes are discharged liquidate liquidating in chamber 17, and because Taper Pipe spout is narrow, its effluxvelocity is very high, causes very large flow losses, further reduces flow, and its single stream pipe flow is
.
Piezoelectric vibrator 1,4 is inhaled into pump chamber to fluid during top offset, is suction process.In pump, mobility status as shown in Figure 8,9, and a part of fluid is inhaled into outlet plenum 14 by outer pipe 13, flows into pump chamber lower half portion 7,11 through Taper Pipe 12,15.Now Taper Pipe 12,15 is collapsible tube, and inhalation flow is less, and its single stream pipe flow is
; Another part fluid is inhaled into snout cavity lower half portion 8 by inlet tube 9, and through snout cavity upper half part 16,19, liquidate chamber 17, Taper Pipe 18,20, finally flows into pump chamber lower half portion 7,11.Now Taper Pipe 18,20 is diffusing tube, and inhalation flow is comparatively large, and low owing to flowing into the liquid speed liquidated in chamber 17, liquidating, convection phenomena in chamber 17 is not obvious, and relative to discharge process, it is less to flow effect, and its single stream pipe flow is
.
A discharge process and suction process composition one-period, the pump discharge of one-period is that outer pipe 13 flows out flow and the difference flowing into flow, or inlet tube 9 flows into flow and the difference flowing out flow.Because suction process is identical with the pump chamber variable quantity of discharge process, namely
, then pump discharge in one-period
for
Cause very large flow losses because the two strands of jets liquidated in discharge process in chamber 17 liquidate, make flow
less, liquidated by above formula this jet known and improve pump discharge
.Namely compare traditional cone pipe Valveless piezoelectric pump, the flow of this Micropump is higher.
Claims (3)
1. a double-cavity parallel conical pipe Valveless piezoelectric pump, pump cover (3), the pump housing (6) and pump seat (10) are from top to bottom combined by bonding or binder, two piezoelectric vibrators (1, 4) be fixed on pump cover (3), pump cover (3) is provided with two the pump chamber upper half part (2 in left and right, 5), it is characterized in that: the pump housing (6) is established two the pump chamber lower half portions (11 in left and right, 7), the Taper Pipe (12 of four same structure sizes, 15, 18, 20), outlet plenum (14), former and later two snout cavity upper half part (19, 16) and upper half part of the chamber that liquidates (17) and outer pipe (13), the large end of first, second Taper Pipe (12,15) is communicated with outlet plenum (14), the small end of the first Taper Pipe (12) be communicated with left pump chamber lower half portion (11) and the center line of the first Taper Pipe (12) through the center of left pump chamber lower half portion (11), the small end of the second Taper Pipe (15) be communicated with right pump chamber lower half portion (7) and the center line of the second Taper Pipe (15) through the center of right pump chamber lower half portion (7), three, the small end of the 4th Taper Pipe (18,20) is all communicated with the chamber that liquidates (17), the large end of the 3rd Taper Pipe (18) is communicated with right pump chamber lower half portion (7), the large end of the 4th Taper Pipe (20) is communicated with left pump chamber lower half portion (11), the centerline collineation of two pump chamber lower half portions (7,11) and the 3rd, the 4th Taper Pipe (18,20).
2. a kind of double-cavity parallel conical pipe Valveless piezoelectric pump according to claim 1, is characterized in that: four described Taper Pipe (12,15,18,20) smallest cross-sectional place width
abe 50 μm to 300 μm, length is
a10 times to 20 times, cone angle
θit is 5 ° to 15 °.
3. a kind of double-cavity parallel conical pipe Valveless piezoelectric pump according to claim 2, is characterized in that: the left and right width of the chamber that liquidates (17)
bfor
a3 times to 10 times, the anterior-posterior length of the chamber that liquidates (17)
cfor width
b4 times to 8 times, the degree of depth of two pump chamber lower half portions (7,11), four Taper Pipes, the chamber that liquidates (17), outlet plenum (14) is
a1 times to 2 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310555216.XA CN103644101B (en) | 2013-11-11 | 2013-11-11 | A kind of double-cavity parallel conical pipe Valveless piezoelectric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310555216.XA CN103644101B (en) | 2013-11-11 | 2013-11-11 | A kind of double-cavity parallel conical pipe Valveless piezoelectric pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103644101A CN103644101A (en) | 2014-03-19 |
| CN103644101B true CN103644101B (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310555216.XA Expired - Fee Related CN103644101B (en) | 2013-11-11 | 2013-11-11 | A kind of double-cavity parallel conical pipe Valveless piezoelectric pump |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105736330A (en) * | 2016-02-02 | 2016-07-06 | 河南工业大学 | Medical micro-injection parallel micro-pump |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1442612A (en) * | 2003-04-11 | 2003-09-17 | 华中科技大学 | Valve less thin film driving micro pump |
| CN102135087A (en) * | 2011-04-12 | 2011-07-27 | 江苏大学 | Diffusion/contraction combined pipe valveless piezoelectric pump |
| CN102691648A (en) * | 2012-05-02 | 2012-09-26 | 江苏大学 | Valveless piezoelectric pump with axisymmetric logarithmic spiral pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009121242A (en) * | 2007-11-12 | 2009-06-04 | Nec Corp | Diaphragm type liquid conveyance device |
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2013
- 2013-11-11 CN CN201310555216.XA patent/CN103644101B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1442612A (en) * | 2003-04-11 | 2003-09-17 | 华中科技大学 | Valve less thin film driving micro pump |
| CN102135087A (en) * | 2011-04-12 | 2011-07-27 | 江苏大学 | Diffusion/contraction combined pipe valveless piezoelectric pump |
| CN102691648A (en) * | 2012-05-02 | 2012-09-26 | 江苏大学 | Valveless piezoelectric pump with axisymmetric logarithmic spiral pipe |
Non-Patent Citations (2)
| Title |
|---|
| 两腔压电泵结构与特性;阚君武，彭太江，唐可洪等;《压电与声光》;20060228;第28卷(第1期);39-42 * |
| 双腔并联式无阀压电微泵的设计及制作;李鑫，闫卫平，徐迎华等;《压电与声光》;20100815;第32卷(第4期);611-614 * |
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| CN103644101A (en) | 2014-03-19 |
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