CN204493144U - Compound bluff body Valveless piezoelectric pump - Google Patents
Compound bluff body Valveless piezoelectric pump Download PDFInfo
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- CN204493144U CN204493144U CN201520162880.2U CN201520162880U CN204493144U CN 204493144 U CN204493144 U CN 204493144U CN 201520162880 U CN201520162880 U CN 201520162880U CN 204493144 U CN204493144 U CN 204493144U
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- bluff body
- pump
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- choked flow
- outlet pipe
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Abstract
Abnormity compound bluff body Valveless piezoelectric pump, pump chamber end face is provided with piezoelectric vibrator; Pump seat is provided with bluff body, pump side wall is provided with and connects pump chamber and first, second extraneous fluid inlet/outlet pipe, first, second fluid inlet/outlet pipe is symmetricly set on pump side wall, bluff body comprises front conductor and main bluff body, front conductor and main bluff body are symmetrical structure, symmetry axis overlaps, and the two ends of symmetry axis are respectively towards first, second fluid inlet/outlet pipe; Front conductor has drainage face and choked flow face, and drainage, facing to first fluid inlet/outlet pipe, during fluid turnover pump chamber, plays shunting guiding function; Choked flow, facing to main bluff body, during fluid turnover pump chamber, plays choked flow guiding function; Main bluff body comprises drainage face and choked flow face, and drainage is facing to the choked flow face of front conductor, and choked flow is facing to second fluid inlet/outlet pipe.Abnormity compound bluff body Valveless piezoelectric pump comparatively adopts the Valveless piezoelectric pump of the bluff body of regular shape can realize better pumping effect.
Description
Technical field
The utility model belongs to fluid machinery technical field, relates to a kind of compound bluff body Valveless piezoelectric pump.
Background technique
Relative to conventional pump, piezoelectric pump does not need additional drives motor, but utilizes the inverse piezoelectric effect of piezoelectric constant to make piezoelectric vibrator produce distortion, then is realized fluid output by the volume-variation of distortion generation pump chamber or utilized piezoelectric vibrator to produce fluctuation carrying out fluid transfer.Valve piezoelectric pump and Valveless piezoelectric pump is had according to piezoelectric pump being divided into or without valve body in pump chamber.The fluid input of Valveless piezoelectric pump is communicated with outlet, the special shape on tube road, pump chamber structure or in pump chamber, arrange the effect of choke apparatus realization " valve ".
Bluff body Valveless piezoelectric pump realizes the function of pumping fluid by the forward and reverse flow resistance difference being arranged on the bluff body on pump-foot.The form that arranges of the bluff body of existing bluff body Valveless piezoelectric pump is: the bluff body studying a kind of shape, by bluff body according to certain aligned transfer on pump-foot, fluid flows through in the gap of each bluff body.The form of bluff body is various, when its general character is: the multiple bluff bodys on pump-foot are all regular shape, same shape.
The application number of claimant be 201210396143.X formerly application discloses a kind of bluff body choked flow Valveless piezoelectric pump.It is disclosed that following technical characteristics: " pump-foot being provided with at least one bluff body ", " bluff body has the first fluoran stream surface and the second fluoran stream surface; the first described fluoran stream surface has smooth, smoother curved surface; the second described fluoran stream surface has steep end face ", " bluff body is arranged on direct through groove equally spacedly ".As can be seen from the accompanying drawing in first patent application also, bluff body is distributed on pump-foot, although the first fluoran stream surface and second fluoran stream surface of this structure bluff body can form flow resistance difference, but due to the regular shape of bluff body, arranging structure is even, can not reach better flow resistance difference and pumping effect.
Model utility content
The utility model proposes the concept of compound bluff body, object is to provide a kind of rational in infrastructure, compound bluff body Valveless piezoelectric pump that resistance flowing effect is good.
The technical solution of the utility model is: compound bluff body Valveless piezoelectric pump, and comprise pump seat, pump side wall, pump upper cover, three surrounds pump chamber, and pump chamber end face is provided with piezoelectric vibrator; Pump seat is provided with bluff body, pump side wall is provided with and connects pump chamber and first, second extraneous fluid inlet/outlet pipe, first, second fluid inlet/outlet pipe is symmetricly set on pump side wall, described bluff body comprises conductor and at least one main bluff body before at least one arrangement in turn, described front conductor has drainage face and choked flow face, drainage, facing to first fluid inlet/outlet pipe, during fluid turnover pump chamber, plays shunting guiding function; Choked flow, facing to main bluff body, during fluid turnover pump chamber, plays choked flow effect; Described main bluff body comprises drainage face and choked flow face, and drainage is facing to the choked flow face of front conductor, and choked flow is facing to second fluid inlet/outlet pipe; The transverse end surface of the end face in described main bluff body choked flow face is greater than the transverse end surface in described front conductor choked flow face, and main choked flow effect is played in the choked flow face of main bluff body.Described front conductor and main bluff body can adopt the compound of of the same type, dissimilar or special-shaped bluff body, such as, before conductor and main bluff body can be partly ask scarce, the bluff body of the type such as semicolumn, also can be the special-shaped bluff bodys such as V-type, Ω type, π type.Fluid passes in and out pump chamber from first, second fluid inlet/outlet pipe simultaneously, fluid flows in the process of pump chamber, the drainage of front conductor guiding function in the face of the fluid that flows into from first fluid inlet/outlet pipe, the effect of Assist drainage is also played in the drainage face of main bluff body, the choked flow face of front conductor and the choked flow of main bluff body are in the face of the effect of choked flow from the fluid that second fluid inlet/outlet pipe enters, from macroscopically, fluid flows in the process of pump chamber, and the fluid flowed into from first fluid inlet/outlet pipe is many compared with the fluid flowed into from second fluid inlet/outlet pipe; In like manner, fluid flows out in the process of pump chamber, and the fluid flowed out from second fluid inlet/outlet pipe is many compared with the fluid flowed out from first fluid inlet/outlet pipe.
Preferably: front conductor and main bluff body are arranged in a linear, and are symmetrical structure, symmetry axis overlaps, and the two ends of symmetry axis are respectively towards first, second fluid inlet/outlet pipe.As preferably, front conductor and main bluff body adopt symmetrical structure can ensure bluff body both sides uniform flow, strengthen the stability of Valveless piezoelectric pump operation.
Preferably: front conductor is " V " shape, the tip surface of " V " shape is drainage face, towards first fluid inlet/outlet pipe; The one side relative with tip surface is choked flow face, towards main bluff body; Two sides at " V " shape tip are towards the fluid entered from first fluid inlet/outlet pipe, fluid is guided to flow along the direction of two sides, play the effect of drainage, relative with tip surface one facing to main bluff body, namely towards the fluid flowed into from second fluid inlet/outlet pipe, because this one side forms dark " V " type groove, convection cell resistance is large, therefore plays and stops that fluid flows into the object of pump chamber from second fluid inlet/outlet pipe.Except the structure of " V " shape, front conductor can also adopt other shapes, the drainage face of front conductor is not pass in and out the vertical end face in direction with fluid, the inclined-plane that the direction that itself and fluid pass in and out is angled, this angle is between 0 ° ~ 90 °, just can realize postive direction drainage, the effect of contrary direction choked flow.
Preferably: main bluff body comprises the first drainage face, the second drainage face and the 3rd choked flow face, the first drainage face is near front conductor, and the first drainage face of symmetry axis both sides extends into one " V " type, and the tip of " V " shape is towards front conductor; Second drainage face is arc-shaped curved surface; 3rd choked flow face is steep end face, towards second fluid inlet/outlet pipe.First drainage face and the second drainage face assist the drainage face of front conductor to reach the effect of drainage, shunting, and the effect stopping that second fluid inlet/outlet pipe fluid flows into is played in the 3rd choked flow face.The shape of main bluff body is not limited thereto, and multi-segment structure can be made as required in its drainage face, but the direction in drainage face must be between vertical with the direction that the fluid of first fluid inlet/outlet pipe flows into and parallel between.
Preferably: the width in the 3rd choked flow face is greater than the second drainage face.
Preferably: the symmetry axis place of main bluff body forms fluid passage, and in the process of fluid inflow and outflow pump chamber, the effect of Assist drainage is played in fluid passage.
Preferably: the object of Valveless piezoelectric pump design is that to realize larger flow resistance poor in the process of fluid turnover, and fluid flows in the flow field in pump chamber, and stream field structure difference, also can play different effects to choked flow drainage.Pump side wall and pump seat form flow field after installing, and have carried out particular design to pump side wall, and on pump side wall, with the line of first, second fluid inlet/outlet pipe for symmetry axis, be provided with vertical retention device respectively, the length direction of retention device is parallel to symmetry axis.After pump side wall and pump seat are installed, retention device perpendicular to pump seat, and connects with pump seat, jointly forms a rectangle flow field with pump seat.Flow in the flow field that fluid only can be formed at two retention devices, turnover pump chamber.
Working principle of the present utility model following (defining by first fluid inlet/outlet pipe to the direction of second fluid inlet/outlet pipe is forward, otherwise is reverse):
After piezoelectric vibrator energising, convert electrical energy into mechanical energy, produce upwards protuberance and reciprocal transformation to lower recess and move, make pump chamber volume produce periodically change, the pressure in pump chamber converts thereupon, and convection cell produces the effect of suction and expulsion force.
The suction process of pump: piezoelectric vibrator moves upward, pump chamber becomes large pressure and reduces, and fluid sucks pump chamber via first fluid inlet/outlet pipe, second fluid inlet/outlet pipe simultaneously.
Concerning forward flow, front conductor is that convection cell plays shunting, guide function, makes fluid run into blocking of bluff body and there will not be the stifled and water level of Yong to gush high phenomenon, reduce pressure drag (namely reducing flow resistance); The further water conservancy diversion of fluid that front conductor distributes by main bluff body, can delay being separated of front conductor and main bluff body top interlayer in suitable spacing range, reduce flow resistance during forward flow.
Concerning reverse flow, the resistance of steep end face convection cell compared with circular arc and inclined-plane much bigger, by large size, fluid is stopped that easily forming water level gushes height along flowing vertically on direction, pressure drag increases; Meanwhile, conductor internal recess region before the segment fluid flow that Yong blocks up flows into via the rectangularl runner that pump chamber and bluff body surround, further increases flow resistance, thus enables reverse flow produce larger flow resistance.
Thus it is poor that reverse and forward flow can form larger flow resistance, and the fluid making forward suck is more than the fluid oppositely sucked.
The discharge process of pump:
Oscillator moves downward compression pump chamber, chamber inner volume reduction, pressure are higher than mouth of pipe place pressure, fluid is compressed discharges pump chamber along first fluid inlet/outlet pipe, second fluid inlet/outlet pipe simultaneously, but due to the effect of compound bluff body, make fluid walk around main bluff body along forward and the flow resistance that flows out pump chamber is less than the flow resistance flowing out pump chamber along conductor inner region before oppositely streaming equally, the fluid of thus discharging via forward is more than oppositely.
Coordinate the periodic vibration of oscillator, namely define the uninterrupted pumping of pump.The opening angle of front conductor, front conductor and main bluff body form width of flow path, the spacing of front and back two compound body and the physical dimension of two compound bodys and all directly affect anyway to flow resistance extent; Flow resistance difference is larger, and pump duty is higher, and pump-conveying property is better.
The beneficial effects of the utility model are:
1, compound bluff body and traditional bluff body are all formed without moving member valve according to anti-, forward flow resistance difference; Single group of compound body formed anyway to flow resistance difference will the uniform bluff body of uniform shape is formed in pump chamber flow resistance poor, so, compound bluff body substitutes the uniform bluff body of multiple shape, not only simplify without moving member valve and pump chamber structure but also effectively reduce pump chamber space, be more conducive to the microminiaturization of valveless pump.
2, compound bluff body adopts part construction, and the drainage face of front conductor and main bluff body has coordinated drainage, and choked flow face has coordinated choked flow effect, is conducive to forming larger flow resistance poor.
3, existing Valveless piezoelectric pump pump chamber mostly is cylindrical body, form the flow field of a cylindrical boundary, the utility model has carried out particular design to pump side wall, make pump side wall after installing with pump seat, form the flow field of square boundary, compared with square boundary flow field, the flow field of cylindrical boundary comparatively disperses, and it is poor that rectangle flow field is more conducive to form large flow resistance.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the utility model
Fig. 2 is the utility model plan structure schematic diagram
Fig. 3 is compound bluff body structural representation
Fig. 4 is space, the rectangle flow field schematic diagram that compound bluff body and pump seat are formed
Fig. 5 is pump chamber perspective view
In figure, 1-pump chamber, 2-pump seat, 3-piezoelectric vibrator, conductor before 4-, the main bluff body of 5-, 6-first fluid inlet/outlet pipe, 7-second fluid inlet/outlet pipe, 8-drainage face, 9-choked flow face, 10-first drainage face, 11-second drainage face, 12-the 3rd choked flow face, 13-retention device, 14-symmetry axis, 15-fluid passage, h1-runner, h2 runner
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figures 1 to 5:
Compound bluff body Valveless piezoelectric pump, comprise pump seat 2, pump side wall, pump upper cover, three surrounds pump chamber 1, and pump chamber 1 end face is provided with piezoelectric vibrator 3; Pump seat 2 is provided with bluff body, pump side wall is provided with and connects pump chamber and extraneous first fluid inlet/outlet pipe 6, second fluid inlet/outlet pipe 7, first fluid inlet/outlet pipe 6, second fluid inlet/outlet pipe 7 are symmetricly set on pump side wall, bluff body comprises front conductor 4 and main bluff body 5, front conductor 4 and main bluff body 5 are symmetrical structure, the two symmetry axis 14 overlaps, and the two ends of symmetry axis 14 are respectively towards first fluid inlet/outlet pipe 6, second fluid inlet/outlet pipe 7; Front conductor 4 has drainage face 8 and choked flow face 9, and shunting guiding function, towards first fluid inlet/outlet pipe 6, during fluid turnover pump chamber 1, is played in drainage face 8; Choked flow guiding function, towards main bluff body 5, during fluid turnover pump chamber 1, is played in choked flow face 9; Main bluff body 5 comprises drainage face and choked flow face, and drainage is facing to the choked flow face 9 of front conductor 4, and choked flow is facing to second fluid inlet/outlet pipe 7.
In the present embodiment, front conductor selects " V " shape, and the tip surface of " V " shape is drainage face 8, towards first fluid inlet/outlet pipe 6; The one side relative with tip surface is choked flow face 9, towards main bluff body 5; Two sides at " V " shape tip are towards the fluid entered from first fluid inlet/outlet pipe 6, fluid is guided to flow along the direction of two sides, play the effect of drainage, relative with tip surface one facing to main bluff body 5, namely towards the fluid flowed into from second fluid inlet/outlet pipe 7, because this one side is formed with dark " V " type groove, convection cell resistance is large, therefore plays and stops that fluid flows into the object of pump chamber 1 from second fluid inlet/outlet pipe 7.
In the present embodiment, the drainage face of main bluff body 5 has two, choked flow face has one, the structure of main bluff body comprises the first drainage face 11, drainage face 10, second and the 3rd choked flow face 12, first drainage face 10 is near front conductor 4, first drainage face 10 of symmetry axis 14 both sides extends into one " V " type, and the direction at the tip of " V " shape is towards front conductor 4; Second drainage face 11 is arc-shaped curved surface; 3rd choked flow face 12 is steep end face, towards second fluid inlet/outlet pipe 7.The drainage face 8 of the first auxiliary front conductor 4 in drainage face 10 and the second drainage face 11 reaches the effect of drainage, shunting, and the effect stopping that second fluid inlet/outlet pipe 7 fluid flows into is played in the 3rd choked flow face 12.The width in the 3rd choked flow face 12 is greater than the second drainage face 11.Symmetry axis 14 place of main bluff body 5 forms fluid passage 15, and flow at fluid, flow out in the process of pump chamber 1, the effect of Assist drainage is played in fluid passage 15.
The object of Valveless piezoelectric pump design is that to realize larger flow resistance poor in the process of fluid turnover, and fluid flows in the flow field in pump chamber, and stream field structure difference, also can play different effects to choked flow drainage.On pump side wall, with the line of first fluid inlet/outlet pipe 6, second fluid inlet/outlet pipe 7 for symmetry axis, be provided with vertical retention device 13 respectively, the length direction of retention device 13 is parallel to symmetry axis.After pump side wall and pump seat 2 are installed, retention device 13 perpendicular to pump seat 2, and connects with pump seat 2, jointly forms a rectangle flow field with pump seat 2.Flow in the flow field that fluid only can be formed at two retention devices 13, turnover pump chamber 1.
Fluid always to pass in and out pump chamber 1 from first fluid inlet/outlet pipe 6, second fluid inlet/outlet pipe 7 simultaneously, fluid forward flows in the process of pump chamber 1, the drainage of front conductor 4 guiding function in the face of the fluid that flows into from first fluid inlet/outlet pipe 6, the effect of Assist drainage is also played in first drainage face 11, drainage face 10, second of main bluff body 5, by fluid inertia effect, fluid flows along the runner h1 between front conductor 4 and the choke apparatus 13 and runner h2 between main bluff body 5 and choke apparatus 13, walk around main bluff body 5 and flow into pump chamber 1, present little flow resistance, fluid oppositely flows in the process of pump chamber 1, 3rd choked flow face 12 of main bluff body 5 and the choked flow face 9 of front conductor 4 are to the effect of choked flow the fluid entered from second fluid inlet/outlet pipe 7, major part fluid is stopped by the 3rd choked flow face 12 of main bluff body 5, part fluid flows into " V " shape space of choked flow face 9 formation via fluid passage 15, stopped, sub-fraction fluid is also had to flow into pump chamber via runner h2, this process whole structure is large choked flow, from macroscopically, fluid flows in the process of pump chamber 1, the fluid flowed into from first fluid inlet/outlet pipe 6 is many compared with the fluid flowed into from second fluid inlet/outlet pipe 7, in like manner, fluid flows out in the process of pump chamber 1, and the fluid flowed out from second fluid inlet/outlet pipe 7 is many compared with the fluid flowed out from first fluid inlet/outlet pipe 6.
Claims (7)
1. compound bluff body Valveless piezoelectric pump, comprise pump seat, pump side wall, pump upper cover, three surrounds pump chamber, and pump chamber end face is provided with piezoelectric vibrator; Pump seat is provided with bluff body, pump side wall is provided with and connects pump chamber and first, second extraneous fluid inlet/outlet pipe, first, second fluid inlet/outlet pipe is symmetricly set on pump side wall, it is characterized in that: described bluff body comprises conductor and at least one main bluff body before at least one arrangement in turn, described front conductor has drainage face and choked flow face, drainage, facing to first fluid inlet/outlet pipe, during fluid turnover pump chamber, plays shunting guiding function; Choked flow, facing to main bluff body, during fluid turnover pump chamber, plays choked flow effect; Described main bluff body comprises drainage face and choked flow face, and drainage is facing to the choked flow face of front conductor, and choked flow is facing to second fluid inlet/outlet pipe; The transverse end surface of the end face in described main bluff body choked flow face is greater than the transverse end surface in described front conductor choked flow face.
2. compound bluff body Valveless piezoelectric pump as claimed in claim 1, is characterized in that: front conductor and main bluff body are arranged in a linear, and are symmetrical structure, and symmetry axis overlaps, and the two ends of symmetry axis are respectively towards first, second fluid inlet/outlet pipe.
3. compound bluff body Valveless piezoelectric pump as claimed in claim 2, is characterized in that: described front conductor is " V " shape, and the tip surface of " V " shape is drainage face, towards first fluid inlet/outlet pipe; The one side relative with tip surface is choked flow face, towards main bluff body.
4. compound bluff body Valveless piezoelectric pump as claimed in claim 3, it is characterized in that: described main bluff body comprises the first drainage face, the second drainage face and the 3rd choked flow face, first drainage face is near front conductor, first drainage face of symmetry axis both sides extends into one " V " type, and the tip of " V " shape is towards front conductor; Second drainage face is arc-shaped curved surface; 3rd choked flow face is steep end face, towards second fluid inlet/outlet pipe.
5. compound bluff body Valveless piezoelectric pump as claimed in claim 4, is characterized in that: the width in described 3rd choked flow face is greater than the second drainage face.
6. as the compound bluff body Valveless piezoelectric pump in claim 2 to 5 as described in any one, it is characterized in that: the symmetry axis place of described main bluff body forms fluid passage.
7. compound bluff body Valveless piezoelectric pump as claimed in claim 6, it is characterized in that: on described pump side wall, with the line of first, second fluid inlet/outlet pipe for symmetry axis, be provided with vertical retention device respectively, the length direction of retention device is parallel to symmetry axis, and after pump side wall and pump seat are installed, retention device is perpendicular to pump seat, and connect with pump seat, jointly form a rectangle flow field with pump seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520162880.2U CN204493144U (en) | 2015-03-20 | 2015-03-20 | Compound bluff body Valveless piezoelectric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520162880.2U CN204493144U (en) | 2015-03-20 | 2015-03-20 | Compound bluff body Valveless piezoelectric pump |
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| Publication Number | Publication Date |
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| CN204493144U true CN204493144U (en) | 2015-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520162880.2U Withdrawn - After Issue CN204493144U (en) | 2015-03-20 | 2015-03-20 | Compound bluff body Valveless piezoelectric pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696203A (en) * | 2015-03-20 | 2015-06-10 | 青岛农业大学 | Composite bluff body valve-less piezoelectric pump |
-
2015
- 2015-03-20 CN CN201520162880.2U patent/CN204493144U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696203A (en) * | 2015-03-20 | 2015-06-10 | 青岛农业大学 | Composite bluff body valve-less piezoelectric pump |
| CN104696203B (en) * | 2015-03-20 | 2017-06-27 | 青岛农业大学 | Compound bluff body Valveless piezoelectric pump |
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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: 20150722 Effective date of abandoning: 20170627 |
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| AV01 | Patent right actively abandoned |