CN201221459Y - Piezoelectric pump with valve - Google Patents
Piezoelectric pump with valve Download PDFInfo
- Publication number
- CN201221459Y CN201221459Y CNU2008200807824U CN200820080782U CN201221459Y CN 201221459 Y CN201221459 Y CN 201221459Y CN U2008200807824 U CNU2008200807824 U CN U2008200807824U CN 200820080782 U CN200820080782 U CN 200820080782U CN 201221459 Y CN201221459 Y CN 201221459Y
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- Prior art keywords
- pump
- piezoelectric
- valve
- tinsel
- piezoelectric ceramic
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Abstract
The utility model discloses a check-valved piezoelectric pump, pertaining to the field of fluid machines. The operation efficiency of a check-valved piezoelectric pump is higher than the operation efficiency of a valveless piezoelectric pump, however, the structure is more sophisticated than the structure of the valveless piezoelectric pump, and the operation efficiency of the pump can not be improved too much. Two piezoelectric vibrators (8) are mounted on the suction inlet and the discharge outlet respectively along the flow direction of the fluid; the piezoelectric vibrator comprises a pore-plate metal piece with holes arranged in the middle, a ring-shaped piezoelectric ceramic piece and an active valve; the ring-shaped piezoelectric ceramic piece is coaxially cemented with the pore-plate metal piece; the active valve is made of a radial metal piece and a radial piezoelectric ceramic piece cemented together; the metal piece is coaxially mounted and coupled with the pore-plate metal piece at the center, the coupled part is a stationary part and the remained part is a moving part, and the holes on the pore-plate metal piece is covered by the moving part. The check-valved piezoelectric pump is simple in structure, and is capable of overcoming the disadvantages of the valveless pump, i.e. low efficiency, lagged pump valve and the pump cavity is not easy to reduce, and is capable of improving the pump flux to a large extent.
Description
Technical field
The utility model relates to a kind of novel valve piezoelectric pump that has, and belongs to field of fluid machinery.
Background technique
Piezoelectric pump is because of its electromechanical conversion efficiency height, and no chemistry and electromagnetic pollution are so have broad application prospects in fields such as medical treatment, health, health cares.Have the no-trump piezoelectric pump to be divided into valve piezoelectric pump and Valveless piezoelectric pump are arranged according to pump valve.
Valveless piezoelectric pump makes piezoelectric pump simple in structure because of not making complicated action valve body, easily processing and fabricating and small-sized, microminiaturized.Because it does not have valve, rely on special pump chamber or the tube flowing structure controlling liquid one-way flow on macroscopic view of shape.Typical case's Valveless piezoelectric pump is a conical flow pipe Valveless piezoelectric pump, as shown in Figure 1.It has adopted a pair of at least one inverted conical flow pipe, because the flow resistance of liquid when large port flows to portlet is different with the resistance that flows to large port from portlet, periodically inhale in journey, the scheduling process at pump and to produce difference in flow, thereby on macroscopic view, show as one-way flow.By the working principle of valveless press pump as can be known, its working efficiency has valve piezoelectric pump much lower.
Have valve piezoelectric pump to rely on the flow direction of valve controlling liquid, inhaling journey during the halftime when pump work, suction valve is opened, and expulsion valve cuts out; When pump work in scheduling during the halftime, suction valve closure, expulsion valve is opened.Liquid does not have to reflux substantially, working efficiency is higher, but structure need be assembled the valve that two controlling liquid flow to than valveless press pump complexity on the pump housing, at present, these two valve overwhelming majority that are assemblied in the piezoelectric pump are servo-actuateds, when the pressure in the pump chamber was lower than ambient pressure, under the ambient pressure effect, suction valve was opened, expulsion valve then cuts out under ambient pressure, and pump enters to be inhaled the journey halftime; When the pump chamber internal pressure was higher than ambient pressure, suction valve cut out under the effect of pump chamber pressure, and expulsion valve is then opened under the effect of pump chamber pressure.Have valve piezoelectric pump to rely on the frequency of okperation that improves pump to improve the flow of pump usually, but be subjected to the restriction of pump valve moving element inertia, the frequency of okperation of pump can not be carried very highly, and therefore, the ability to work of pump is restricted.Fig. 2 is a kind of valve piezoelectric pump that typically has.For improving the response frequency of pump valve, at present, structures such as existing static excitation valve, magnetic pumping valve.But these valves still need pump chamber for it provides space and mounting point, and pump structure can not further be reduced.
The model utility content
It is a kind of simple in structure that the purpose of this utility model is to provide, need on pump chamber, not assemble the aggressive valve piezoelectric pump of valve, with overcome above-mentioned Valveless piezoelectric pump efficiency low and have the valve piezoelectric pump pump valve to lag behind, the piezoelectric vibrator frequency can not be carried very highly, pump chamber and the pump housing are difficult for reducing defective, and can increase substantially the valve piezoelectric pump that has of pump duty.
The utility model provides a kind of valve piezoelectric pump that has, and as shown in Figure 3, piezoelectric vibrator 8 is owing to self have active valve 11, and valve can be under the effect of control voltage, according to the beat opening and closing of inhaling journey and scheduling; Two such piezoelectric vibrator 8 longshore current directions of flow are installed on pump intake and the exhaust port in the same way;
The structure of piezoelectric vibrator 8 as shown in Figure 4, by orifice plate tinsel 1, ring piezoelectric ceramic plate 2 and active valve 11 combine; Orifice plate tinsel 1 and ring piezoelectric ceramic plate I2 are shown in Fig. 5 a and Fig. 5 b, and the shape in the hole of orifice plate tinsel 1 middle part branch can be according to circumstances different and different with number; Ring piezoelectric ceramic plate 2 is coaxial bonding with orifice plate tinsel 1; Active valve 11 is tinsel 3 and a piezoelectric ceramic 5 bonding forming, and as shown in Figure 6, but stamping-out goes out groove on the tinsel 3, makes radially, and simultaneously, piezoelectric ceramic 5 is also made radial; Tinsel 3 is coaxial to be installed on the orifice plate tinsel 1 opposite side relative with ring piezoelectric ceramic plate 2, radial tinsel 3 and orifice plate tinsel 1 connect in the center, the part that connects is a stationary part, and remaining part is a motion parts, and motion parts covers the hole on the orifice plate tinsel 1.
It is in order to reduce rigidity, to increase the open amount of valve, reducing liquid flowing resistance that aggressive valve 11 is made radial; Consider to reduce liquid flowing resistance if exceed, aggressive valve 11 also can adopt another kind of more succinct structure, as shown in Figure 7, and by an annular sheet metal 12 and bonding the forming of a ring piezoelectric ceramic plate II13.
Fig. 8 is the suction journey fundamental diagram of this pump.Two piezoelectric vibrators in the pump are applied the opposite alternating voltage of phase place, about aggressive valve on two piezoelectric vibrators also be applied in alternating voltage simultaneously, under the effect of alternating voltage, piezoelectric vibrator is done periodically back and forth buckling deformation.Inhaling journey in the halftime, owing to the voltage on two piezoelectric vibrators is opposite, the left side piezoelectric vibrator is out of shape to the left, the right side piezoelectric vibrator is out of shape to the right, the volume of pump chamber increases, meanwhile, aggressive valve on the piezoelectric vibrator of left side is applied and the opposite voltage of left side piezoelectric vibrator phase place, make its warp direction opposite with the left side piezoelectric vibrator; Aggressive valve on the piezoelectric vibrator of right side is applied and the identical voltage of right side piezoelectric vibrator phase place, make it identical with the warp direction of right side piezoelectric vibrator.Then the active valve on the piezoelectric vibrator of left side is opened, and the active valve on the piezoelectric vibrator of right side is closed.Along with the reduction of pump chamber increase and cavity pressure, the liquid outside the chamber enters pump chamber from the valve that open in the left side.Figure 9 shows that the scheduling halftime of pump, effect bottom left side pressure electric tachometer indicator at voltage is out of shape to the right, the right side piezoelectric vibrator is out of shape to the left, the volume of pump chamber diminishes, at this moment, active valve on the piezoelectric vibrator of left side is applied the voltage identical with the piezoelectric vibrator phase place, make the valve in left side produce and the identical distortion of left side piezoelectric vibrator direction, and the right side valve applies the voltage opposite with the piezoelectric vibrator phase place, produce the distortion opposite with the right side piezoelectric vibrator, then the left side valve closing, the right side valve opening, along with the minimizing of pump chamber volume, liquid is discharged from the right side of pump chamber.Flow thereby make liquid produce single direction, under the Ac effect, above process alternately occurs repeatedly, has realized the effect of pump.
In the utility model development and Design the novel piezoelectric oscillator, make valve piezoelectric pump both save two valves installing on the conventional piezoelectric pump middle pump body, pump chamber can further be reduced, two piezoelectric vibrators in the pump chamber of equal volume, have been used again, working efficiency increases substantially, and owing to the active valve that is installed on the piezoelectric vibrator can change along with the variation of piezoelectric vibrator frequency of okperation, the retardation phenomenon that meeting occurs in traditional pump valve can not appear again, can not occur again because of the pump valve hysteresis influences the problem of the working efficiency of pump, thereby make this pump have more wide actual application prospect.
Description of drawings
Fig. 1 conical flow pipe Valveless piezoelectric pump schematic representation.
Fig. 2 has the valve piezoelectric pump schematic representation.
Fig. 3 is of the present utility model the valve piezoelectric pump structural drawing.
Fig. 4 (a) piezoelectric vibrator plan view.
Fig. 4 (b) piezoelectric vibrator left view
Fig. 5 (a) orifice plate tinsel (1); Fig. 5 (b) ring piezoelectric ceramic plate I (2).
Fig. 6 (a) active valve structure; Fig. 6 (b) tinsel (3); Fig. 6 (c) piezoelectric ceramic (5).
The active valve (11) of the succinct form of Fig. 7 (a); Fig. 7 (b) annular sheet metal (12); Fig. 7 (c) ring piezoelectric ceramic plate II (13).
Fig. 8 is of the present utility model to have valve piezoelectric pump to inhale the journey fundamental diagram.
Fig. 9 is of the present utility model valve piezoelectric pump scheduling fundamental diagram.
Among the figure: 1, orifice plate tinsel, 2, ring piezoelectric ceramic plate I, 3, tinsel, 4, rivet, 5, piezoelectric ceramic, 6, the pump housing, 7, seal washer, 8, piezoelectric vibrator, 9, screw, 10, pump cover, 11, active valve, 12, annular sheet metal, 13, ring piezoelectric ceramic plate II.
Embodiment
Embodiment of the present utility model is fixed on piezoelectric vibrator 8 in the pump housing 6 by seal washer and six screws 9 referring to Fig. 3～8, two pump cover 10, and the orifice plate tinsel 1 in the piezoelectric vibrator 8 is that 0.1mm is thick, external diameter 30mm, latten, on 10 holes are arranged; Ring piezoelectric ceramic plate 2 external diameter 20mm, internal diameter 8mm; The succinct structure of being introduced more than active valve 11 adopts, annular sheet metal 12 external diameter 12mm.Active valve 11 connects with orifice plate tinsel 1 by rivet 4.
Two piezoelectric vibrators insert the opposite 220V alternating voltage of phase place in this enforcement, and aggressive valve connects 220V voltage, and this pump can be worked under the frequency of 120Hz, and flow reaches 1.5L/min.
Claims (1)
1. one kind has valve piezoelectric pump, and piezoelectric vibrator (8) connects firmly with pump chamber, and it is characterized in that: two piezoelectric vibrators (8) longshore current direction of flow is installed on pump intake and the exhaust port in the same way; The structure of described piezoelectric vibrator (8), by middle part orifice plate tinsel (1) with holes, ring piezoelectric ceramic plate I (2) and active valve (11) combine;
Ring piezoelectric ceramic plate I (2) is coaxial bonding with orifice plate tinsel (1); Active valve (11) is radial tinsel (3) and bonding the forming of a radial piezoelectric ceramic (5); The coaxial orifice plate tinsel (1) that is installed in of tinsel (3) is gone up and the relative opposite side of ring piezoelectric ceramic plate I (2), radial tinsel (3) connects in the center with orifice plate tinsel (1), the part that connects is a stationary part, remaining part is a motion parts, and motion parts covers the hole on the orifice plate tinsel (1);
Perhaps aggressive valve (11) is by an annular sheet metal (12) and bonding the forming of a ring piezoelectric ceramic plate II (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200807824U CN201221459Y (en) | 2008-05-23 | 2008-05-23 | Piezoelectric pump with valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200807824U CN201221459Y (en) | 2008-05-23 | 2008-05-23 | Piezoelectric pump with valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201221459Y true CN201221459Y (en) | 2009-04-15 |
Family
ID=40574967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200807824U Expired - Lifetime CN201221459Y (en) | 2008-05-23 | 2008-05-23 | Piezoelectric pump with valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201221459Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285459B (en) * | 2008-05-23 | 2011-01-05 | 北京联合大学 | Piezoelectric pump with valve |
| CN104088778A (en) * | 2014-07-02 | 2014-10-08 | 浙江大学 | Digital hydraulic pump based on Terfenol-D drive |
-
2008
- 2008-05-23 CN CNU2008200807824U patent/CN201221459Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285459B (en) * | 2008-05-23 | 2011-01-05 | 北京联合大学 | Piezoelectric pump with valve |
| CN104088778A (en) * | 2014-07-02 | 2014-10-08 | 浙江大学 | Digital hydraulic pump based on Terfenol-D drive |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090415 Effective date of abandoning: 20080523 |