CN102261325A - Logarithmic solenoid valve pressure-free electric pump - Google Patents
Logarithmic solenoid valve pressure-free electric pump Download PDFInfo
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- CN102261325A CN102261325A CN201110167080A CN201110167080A CN102261325A CN 102261325 A CN102261325 A CN 102261325A CN 201110167080 A CN201110167080 A CN 201110167080A CN 201110167080 A CN201110167080 A CN 201110167080A CN 102261325 A CN102261325 A CN 102261325A
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- logarithmic spiral
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Abstract
The invention relates to a logarithmic solenoid valve pressure-free electric pump, which comprises a pump body consisting of an upper cover and a lower cover connected hermetically, wherein a pump cavity for accommodating a piezoelectric vibrator is formed between the upper cover and the lower cover, and a first logarithmic solenoid and a first direct current tube are arranged in the pump cavity; one end of the first logarithmic solenoid is connected with the pump cavity, and the other end of the first logarithmic solenoid is connected with a fluid inlet formed on the pump body; and one end of the first direct current tube is connected with the pump cavity, and the other end of the first direct current tube is connected with a fluid outlet formed on the pump body. A solenoid technology is organically combined with a piezoelectric technology, and the logarithmic solenoid is adopted, so compared with a conical stream tube pressure-free electric pump, the logarithmic solenoid valve pressure-free electric pump has the advantages that: the electric pump has good one-way flowability, the energy loss of the flowing fluid is reduced, and the work efficiency of the pump is improved; and meanwhile, the application range of the solenoid technology in the fields of heat transfer, mixing and the like is enlarged, and the electric pump is particularly suitable for the magnetic field sensitive environment.
Description
Technical field
The present invention relates to a kind of Valveless piezoelectric pump, relate in particular to a kind of Valveless piezoelectric pump that adopts scroll stream pipe.
Background technique
Press valve body classification if belong to the piezoelectric pump of positive displacement, can be divided into valve and Valveless piezoelectric pump are arranged.If valve is defined as: in the suction and discharge process of pump, have a period at least, make between pump chamber and suction port or the exhaust port, produce disconnected mechanical device, so so-called " valveless " is exactly: at any time, all be communicated with between pump chamber and suction port or the exhaust port.At this moment, rely on special mechanical device during the one-way flow of fluid.This device has utilized the character of fluid, makes pump chamber be communicated with exhaust port with suction all the time, and can order about one-directional fluid flow.At present, the Valveless piezoelectric pump parts that adopt inverted each other collapsible tube and expanding duct to be used as controlling one-directional fluid flow relatively are typically the conical flow pipe more.Fig. 1 is a conical flow pipe Valveless piezoelectric pump, and the characteristics of this pump are simple in structure, can realize microminiaturization; But there is the sudden change of different cross section size in conical stream pipe, and energy loss is big, and flow is less, reverse fluid stopping poor performance, and these shortcomings have all influenced the application of piezoelectric pump in practical field.
Because spiral flow tube has characteristics such as superior structural characteristics, spontaneous centrifugal field, secondary flow and high efficient heat exchanging rate, make the spiral flow tube technology in equal extensive application in field such as heat transfer, mixing, and have the researcher spiral flow tube technology to be applied in doughnut mass transfer separation processes such as micro-filtration, nanofiltration, infiltration and film distillation in recent years, all obtained good effect.But these are used all is to carry out under the external world gives the prerequisite of flow of fluid power, like this spiral flow tube The Application of Technology is restricted, if the additional power source is an electromagnetic machine, that place at some electromagnetic susceptibilities just can not be used, and accurately control following time of environment of fluid flow at needs, can not meet the demands.
Summary of the invention
1. technical problem: the technical problem to be solved in the present invention provides a kind of Miniaturized, has better one-way flow characteristic, but the logarithmic spiral that fluid flow is accurately controlled stream pipe Valveless piezoelectric pump.Overcome shortcomings such as the reverse fluid stopping poor performance of existing Valveless piezoelectric pump, simultaneously, enlarged the application area of spiral flow tube technology in fields such as heat transfer, mixing.
2. technological scheme: in order to solve above-mentioned technical problem, logarithmic spiral stream pipe Valveless piezoelectric pump of the present invention comprises the pump housing that is tightly connected and is formed by loam cake and lower cover, be provided with the pump chamber that accommodates piezoelectric vibrator between loam cake and the lower cover, pump chamber is provided with first logarithmic spiral stream pipe and first DC tube; Described first logarithmic spiral stream Guan Yiduan is connected with pump chamber, and the other end is connected with fluid inlet; Described first DC tube, one end is connected with pump chamber, and the other end is connected with fluid output.Described logarithmic spiral stream pipe is the stream pipe of plane bending, because the central axis of this stream pipe belongs to logarithmic spiral, therefore should flow pipe called after " logarithmic spiral stream pipe ".Logarithmic spiral also is equiangular spiral, as shown in Figure 2.The line out of plumb of the tangent line at every bit place and this point and initial point on the helical, and form an obtuse angle, the angle that different some places forms may not equate.If the angle that the every bit place on the helical forms all equates, claim that then such helical is equiangular spiral or logarithmic spiral.The equation of logarithmic spiral is:
ρ＝a.e
kφ
Wherein, a and k are constant, and φ is a polar angle, and ρ is utmost point footpath, and e is the end of natural logarithm, and its value is 2.71828 ..., be a nonterminating and non-recurring decimal, logarithmic spiral can produce by the process that produces the gold rectangle successively.
Described first logarithmic spiral stream pipe can directly be connected with pump chamber, also can be connected with pump chamber by one second DC tube.
One end of described first DC tube is communicated with pump chamber, and the other end directly or by second logarithmic spiral stream pipe is connected with fluid output; One ground, the helical flow pipe of described first logarithmic spiral stream pipe for being provided with for the starting point clockwise direction with the fluid inlet, terminal point is tie point that links to each other with pump chamber or the tie point that links to each other with second DC tube; Described second logarithmic spiral stream pipe is for being the helical flow pipe that starting point counterclockwise is provided with the fluid output, and its terminal point is the tie point that links to each other with first DC tube.
Described pump chamber comprises and is positioned at lower cover and opening first groove towards loam cake, and is positioned at loam cake and opening second groove towards first groove, and first, second slot opening size is identical, constitutes cavity with piezoelectric vibrator.Described second recess edge is designed to stair-stepping through hole, and piezoelectric vibrator is bonded and fixed in second groove.
One circular vibrating reed of being pasted by the piezoelectric ceramic of circle and tinsel of described piezoelectric vibrator, for the shape with the piezoelectric vibrator of circle adapts, the cross section of described pump chamber is rounded.
For the ease of processing, first, second logarithmic spiral stream pipe and first, second DC tube and first groove all directly carve on lower cover, and promptly logarithmic spiral stream pipe, DC tube and first groove and lower cover are one; Simultaneously, identical rectangular of the cross section of first, second logarithmic spiral stream pipe and first, second DC tube.
When the logarithmic spiral stream of the technical program is managed the Valveless piezoelectric pump work, piezoelectric ceramic and tinsel as the two poles of the earth, when the piezoelectric vibrator indirect current, the piezoelectric constant sector-meeting produces along its dilatation radially, because piezoelectric ceramic and tinsel are bonded to one, and the radial expansion of piezoelectric ceramic and tinsel is different, so when piezoelectric ceramic produces radially dilatation, tinsel also can produce dilatation, and flexible direction is opposite with piezoelectric ceramic, then piezoelectric vibrator will inevitably produce vertically the reciprocal deformation vibration of (normal orientation of piezoelectric ceramic), the power source of piezoelectric vibrator as piezoelectric pump, along with the axially back and forth deformation vibration of piezoelectric vibrator, thereby cause the volume cyclically-varying of piezoelectric pump pump chamber.Piezoelectric vibrator produces axial vibration under inverse piezoelectric effect, cause that pump chamber changes; One can be divided into two stages with an operation cycle of piezoelectric pump: arrive upper dead center (maximum displacement of piezoelectric vibrator away from equilibrium location outside pump chamber) through the equilibrium position from lower dead centre (maximum displacement of piezoelectric vibrator away from equilibrium location in pump chamber) and be the suction journey stage of pump; Arriving lower dead centre from upper dead center through the equilibrium position is the scheduling stage of pump.Inhaling the journey stage, fluid enters pump chamber along first logarithmic spiral stream pipe and first DC tube; In the scheduling stage, fluid is along flowing out pump chamber along first logarithmic spiral stream pipe and first DC tube.Owing to be subjected to the influence of rotation of the earth coriolis force and fluid spin coriolis force, make along the suffered resistance of the fluid of pipe inflow of first logarithmic spiral stream and outflow inequality, and the volume size of inflow or effluent fluid is inversely proportional to the flow resistance size that flows pipe, therefore comprehensive the suction journey and scheduling stage, the fluid volume that flows into pump chamber along first logarithmic spiral stream pipe is more than the fluid volume that flows out pump chamber, makes that having a net flow in the whole cycle flows first DC tube that pipe flows to pump from first logarithmic spiral of pump; On macroscopic view, piezoelectric pump always makes fluid flow into from first logarithmic spiral stream pipe, flows out from first DC tube, thereby has realized the one-way flow of fluid, has realized the function of pump.
In like manner, when the logarithmic spiral stream pipe Valveless piezoelectric pump of the technical program has two logarithmic spiral stream pipes, piezoelectric ceramic and tinsel as the two poles of the earth, when the piezoelectric vibrator indirect current, piezoelectric vibrator produces axial vibration under inverse piezoelectric effect, cause that pump chamber changes, driving fluid comes and goes along two logarithmic spiral stream pipes and flows, owing to be subjected to the influence of rotation of the earth coriolis force and fluid spin coriolis force, to producing different effects along counterclockwise and right handed fluid, make along the suffered resistance of the fluid of pipe inflow of logarithmic spiral stream and outflow inequality, and the volume size of inflow or effluent fluid is inversely proportional to the flow resistance size that flows pipe, so when the pump chamber volume increases, fluid flows into pump chamber from first logarithmic spiral stream pipe and second logarithmic spiral stream pipe, piezoelectric pump was in and inhaled the journey stage this moment, but inequality from the fluid volume of two stream pipe inflow pump chambers; When the pump chamber volume reduced, fluid was managed the outflow pump chamber from first logarithmic spiral stream pipe and second logarithmic spiral stream, and this moment, piezoelectric pump was in the scheduling stage, but inequality from the fluid volume of two stream pipe outflow pump chambers; Analysis is at piezoelectric pump from two stream pipes and inhales journey and scheduling during the stage, how much may be summarized to be of the fluid volume that flows into and flow out: piezoelectric pump be in inhale journey during the stage incoming fluid volume many, then piezoelectric pump be in scheduling during the stage volume of effluent fluid few; Piezoelectric pump be in inhale journey during the stage incoming fluid volume few, then piezoelectric pump be in scheduling during the stage volume of effluent fluid many; On macroscopic view, piezoelectric pump always makes fluid flow pipe from one and flows into, and manages outflow from another stream, thereby has realized the one-way flow of fluid, has realized the function of pump.
3. beneficial effect: logarithmic spiral stream pipe Valveless piezoelectric pump of the present invention is with spiral flow tube technology and piezo technology combination, adopted logarithmic spiral stream pipe, compare with conical flow pipe Valveless piezoelectric pump and to have one-way flow preferably, reduce the energy loss of streaming flow, improved the working efficiency of pump; Simultaneously, enlarged the application area of spiral flow tube, especially be useful under the environment to magnetic-field-sensitive in fields such as heat transfer, mixing; In addition, in the Valveless piezoelectric pump of the present invention, the stream pipe is the rectangular cross-section, and its processing is close to plane processing, compares with circular section stream pipe, and especially under minute yardstick, the processing of rectangular cross-section stream pipe is fairly simple.
Description of drawings
Fig. 1 is a conical flow pipe Valveless piezoelectric pump schematic representation;
Fig. 2 is a logarithmic spiral schematic representation under the rectangular coordinate system;
Fig. 3 is the perspective exploded view of first embodiment's logarithmic spiral stream pipe Valveless piezoelectric pump;
Fig. 4 is the perspective exploded view of second embodiment's logarithmic spiral stream pipe Valveless piezoelectric pump;
Fig. 5 is a logarithmic spiral stream pipe Valveless piezoelectric pump overall structure plan view;
Fig. 6 is a logarithmic spiral stream pipe Valveless piezoelectric pump overall structure A-A sectional view;
Fig. 7 is a logarithmic spiral stream pipe Valveless piezoelectric pump loam cake plan view;
Fig. 8 is a logarithmic spiral stream pipe Valveless piezoelectric pump loam cake B-B sectional view;
Fig. 9 is first embodiment's a logarithmic spiral stream pipe Valveless piezoelectric pump lower cover plan view;
Figure 10 is second embodiment's a logarithmic spiral stream pipe Valveless piezoelectric pump lower cover plan view;
Figure 11 is a logarithmic spiral stream pipe Valveless piezoelectric pump lower cover C-C sectional view;
Figure 12 is the piezoelectric vibrator schematic representation.
Embodiment
Embodiment one:
As Fig. 3, Fig. 6 and shown in Figure 9, the logarithmic spiral of present embodiment stream pipe Valveless piezoelectric pump comprises the pump housing of being made up of loam cake 2 that is tightly connected and lower cover 31, is provided with the pump chamber 5 that accommodates piezoelectric vibrator 4 between loam cake 2 and the lower cover 3; Also comprise one first logarithmic spiral stream pipe 6 and first DC tube 7 between loam cake 2 and the lower cover 3; Described first logarithmic spiral stream pipe 6 one ends are connected with fluid inlet 11 on being arranged on the pump housing 1, and the other end passes through second DC tube 61 and is connected with pump chamber 5; Described first DC tube, 7 one ends are connected with pump chamber 5, and the other end is connected with fluid output 12 on being arranged on the pump housing 1; First logarithmic spiral stream pipe 6, first DC tube 7 and second DC tube 61 all are arranged on the lower cover 3.Loam cake 2 uses 6 bolts (nut) 9 to link together with lower cover 3 by bolt hole on every side 10.
As shown in Figure 9, described first logarithmic spiral stream pipe 6 be with fluid inlet 11 be the starting point dextrorotation to the stream pipe, terminal point is the tie point with second DC tube 61.
In the present embodiment, described fluid inlet 11 and fluid output 12 are arranged on the both sides of pump chamber 5, and fluid inlet 11, first logarithmic spiral stream pipe 6, pump chamber 5, first DC tube 7 and fluid output 12 form the passage that fluid flows.
As Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 and shown in Figure 11, described pump chamber 5 cross sections are rounded, comprise and be positioned at lower cover 3 and opening first groove 31 towards loam cake 2, and be positioned at loam cake 2 and opening second groove 21 towards first groove 31, first, second slot opening size is identical, constitutes cavity with piezoelectric vibrator 4.Described second groove, 21 edge designs become stair-stepping through hole, and piezoelectric vibrator 4 is bonded and fixed in second groove 21.
In the present embodiment, use one-sided type piezoelectric vibrator.As shown in figure 12, one circular vibrating reed of pasting by the piezoelectric ceramic 41 of circle and tinsel 42 of piezoelectric vibrator 4.
In order to prevent the joint seepage, can evenly be coated with silica gel in the joint of parts and seal.
Embodiment two:
As shown in Figure 4, the main structure of present embodiment and embodiment one are basic identical, and different is to contain two logarithmic spiral stream pipes in the present embodiment, and promptly first logarithmic spiral stream pipe, 6 and second logarithmic spiral stream pipe, 8, two stream pipes are symmetrical with pump chamber 5 center lines.
As shown in figure 10, described first logarithmic spiral stream pipe 6 is a starting point with fluid inlet 11, is terminal point with the tie point that links to each other with second DC tube 61, integral body be dextrorotation to; Described second logarithmic spiral stream pipe 8 is a starting point with fluid output 12, is terminal point with the tie point that is connected with first DC tube 7, and integral body is counterclockwise rotation direction.
Claims (9)
1. a logarithmic spiral stream is managed Valveless piezoelectric pump, comprise the pump housing of forming by loam cake that is tightly connected (2) and lower cover (3) (1), be provided with the pump chamber (5) that accommodates piezoelectric vibrator (4) between loam cake (1) and the lower cover (2), it is characterized in that, pump chamber (5) is provided with first logarithmic spiral stream pipe (6) and first DC tube (7), described first logarithmic spiral stream pipe (6) one ends are connected with pump chamber (5), the other end is connected with fluid inlet (11), described first DC tube (7) one ends are connected with pump chamber (5), and the other end is connected with fluid output (12).
2. according to right 1 described logarithmic spiral stream pipe Valveless piezoelectric pump, it is characterized in that described first logarithmic spiral stream pipe (6) is connected with pump chamber (5) by second DC tube (61).
3. according to right 1 or 2 described logarithmic spiral stream pipe Valveless piezoelectric pumps, it is characterized in that described first DC tube (7) is connected with fluid output (12) by second logarithmic spiral stream pipe (8).
4. according to the described logarithmic spiral stream of right 1 pipe Valveless piezoelectric pump, it is characterized in that, described first logarithmic spiral stream pipe (6) be with fluid inlet (11) be the starting point dextrorotation to the stream pipe.
5. according to right 3 described logarithmic spiral stream pipe Valveless piezoelectric pumps, it is characterized in that described second logarithmic spiral stream pipe (8) is to be the stream pipe of the counterclockwise rotation direction of starting point with fluid output (12).
6. logarithmic spiral according to claim 1 stream pipe Valveless piezoelectric pump is characterized in that, described pump chamber (5) be arranged on that lower cover (3) is gone up and opening towards loam cake (2).
7. logarithmic spiral stream pipe Valveless piezoelectric pump according to claim 1, it is characterized in that, described pump chamber (5) is made up of second groove (21) sealing that is arranged on first groove (31) on the lower cover (3) and be arranged on the loam cake (2), and described piezoelectric vibrator (4) is arranged in second groove (21).
8. logarithmic spiral stream pipe Valveless piezoelectric pump according to claim 1 is characterized in that described pump chamber (5) cross section is rounded.
9. according to claim 1 and 2 described logarithmic spiral stream pipe Valveless piezoelectric pumps, it is characterized in that described first logarithmic spiral stream pipe (6), second fermat spiral stream pipe (8), first DC tube (61), second DC tube (7) and first groove (31) all directly carve on lower cover (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110167080A CN102261325A (en) | 2011-06-21 | 2011-06-21 | Logarithmic solenoid valve pressure-free electric pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110167080A CN102261325A (en) | 2011-06-21 | 2011-06-21 | Logarithmic solenoid valve pressure-free electric pump |
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| CN102261325A true CN102261325A (en) | 2011-11-30 |
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| CN201110167080A Pending CN102261325A (en) | 2011-06-21 | 2011-06-21 | Logarithmic solenoid valve pressure-free electric pump |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644104A (en) * | 2013-11-11 | 2014-03-19 | 江苏大学 | Logarithmic spiral tube valveless piezoelectric pump |
| CN103752200A (en) * | 2013-11-11 | 2014-04-30 | 江苏大学 | Novel piezoelectric valveless micromixer |
| CN103877905A (en) * | 2013-11-11 | 2014-06-25 | 江苏大学 | Passive micro mixer |
| CN105649961A (en) * | 2016-01-15 | 2016-06-08 | 泰州职业技术学院 | Piezoelectric pump with spiral-line-shaped valves |
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|---|---|---|---|---|
| EP1323925A2 (en) * | 2001-12-25 | 2003-07-02 | Matsushita Electric Works, Ltd. | Electroactive polymer actuator and diaphragm pump using the same |
| JP2006204100A (en) * | 2006-04-24 | 2006-08-03 | Matsushita Electric Works Ltd | Manufacturing method of electrostriction polymer actuator |
| CN101975154A (en) * | 2010-10-12 | 2011-02-16 | 江苏大学 | Valve-free piezoelectric pump of logarithmic spiral combined tube |
| CN202117897U (en) * | 2011-06-21 | 2012-01-18 | 南京航空航天大学 | Valveless piezoelectric pump employing logarithmic helical flow pipe |
-
2011
- 2011-06-21 CN CN201110167080A patent/CN102261325A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1323925A2 (en) * | 2001-12-25 | 2003-07-02 | Matsushita Electric Works, Ltd. | Electroactive polymer actuator and diaphragm pump using the same |
| JP2006204100A (en) * | 2006-04-24 | 2006-08-03 | Matsushita Electric Works Ltd | Manufacturing method of electrostriction polymer actuator |
| CN101975154A (en) * | 2010-10-12 | 2011-02-16 | 江苏大学 | Valve-free piezoelectric pump of logarithmic spiral combined tube |
| CN202117897U (en) * | 2011-06-21 | 2012-01-18 | 南京航空航天大学 | Valveless piezoelectric pump employing logarithmic helical flow pipe |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644104A (en) * | 2013-11-11 | 2014-03-19 | 江苏大学 | Logarithmic spiral tube valveless piezoelectric pump |
| CN103752200A (en) * | 2013-11-11 | 2014-04-30 | 江苏大学 | Novel piezoelectric valveless micromixer |
| CN103877905A (en) * | 2013-11-11 | 2014-06-25 | 江苏大学 | Passive micro mixer |
| CN103752200B (en) * | 2013-11-11 | 2016-01-20 | 江苏大学 | A kind of piezoelectricity valveless micro-mixer |
| CN103877905B (en) * | 2013-11-11 | 2016-01-20 | 江苏大学 | A kind of passive type micro-mixer |
| CN103644104B (en) * | 2013-11-11 | 2016-03-02 | 江苏大学 | A kind of logarithmic spiral tube Valveless piezoelectric pump |
| CN105649961A (en) * | 2016-01-15 | 2016-06-08 | 泰州职业技术学院 | Piezoelectric pump with spiral-line-shaped valves |
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Application publication date: 20111130 |