CN203067242U - Double-piston tandem-driving piezoelectric stack pump - Google Patents
Double-piston tandem-driving piezoelectric stack pump Download PDFInfo
- Publication number
- CN203067242U CN203067242U CN 201220691019 CN201220691019U CN203067242U CN 203067242 U CN203067242 U CN 203067242U CN 201220691019 CN201220691019 CN 201220691019 CN 201220691019 U CN201220691019 U CN 201220691019U CN 203067242 U CN203067242 U CN 203067242U
- Authority
- CN
- China
- Prior art keywords
- pump
- piston
- piezoelectric stack
- cavity
- pump housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Abstract
The utility model relates to a double-piston tandem-driving piezoelectric stack pump and belongs to the field of microfluid transmission and control. An upper casing body and a lower end cover are fixed on a pump body, an elastic membrane is connected between the pump body and the upper casing body in a pressed mode, a compression cavity piston is connected with the elastic membrane and a ejecting block through screws, and an adjusting screw extrudes a piezoelectric stack arranged in an inner cavity of the upper casing body on the ejecting block through an anti-twisting gasket. A compression cavity is formed by a small end of a pump cavity piston, a one-way valve arranged on the pump cavity piston, the compression cavity piston arranged on the pump cavity piston and the pump body. The lower end cover extrudes a big end of the pump cavity piston on a separation plate through a balance spring, and the compression cavity is communicated with a pump cavity through the one-way valve. The double-piston tandem-driving piezoelectric stack pump has the advantages that one piezoelectric stack is used for driving two pistons connected by a fluid compression cavity to output fluid, the fluid compression cavity can be filled by self and are used for connecting the two pistons in series, the fluid does not act on the piezoelectric stack when the piezoelectric stack does not work, and accordingly the pump is big in flow, small in size, low in cost and high in electromechanical energy conversion efficiency.
Description
Technical field
The utility model belongs to the microminiature piezoelectric pump of microfluid transmission and the application of control field, is specifically related to a kind of double-piston serial and drives piezoelectric stack pump.
Background technique
The dilatation that utilizes piezoelectric stack to produce under electric field action, people have proposed the piezoelectric stack pump of multiple structure, as Chinese patent 200810050240.7,200810064461.X, 200910146813.0,201110173933.7 etc.Compare with traditional mechanical type hydraulic pump, therefore many advantages such as that piezoelectric stack pump has is simple in structure, volume is little, no electromagnetic interference, flow and pressure controllability are good are with a wide range of applications at aspects such as medical treatment, chemical analysis, Aero-Space, the supply of motor car engine fuel, micro electronmechanical liquid systems.As everyone knows, piezoelectricity fold stack driver has higher driving force, its compressive stress up to tens of even up to a hundred MPas, but the dilatation ability is extremely small, micron order only, therefore existing direct-push type piezoelectric stack pump, namely directly utilize the piezoelectric stack driven plunger to realize that the output flow of piezoelectric pump of fluid output is also very limited, can't satisfy the demand of the application of big flow, what can not satisfy especially that Chinese patent 200810051156.7 grades propose is the microminiature application of hydraulic system demand of power source with the piezoelectric stack pump.Therefore, people have proposed to adopt the piezoelectric stack pump of two piezoelectric stacks drivings to improve flow again, as Chinese patent 201010118038.0, though this method can improve the flow of pump, but because adopting two piezoelectric stacks to increase fabricating cost and the volume of pump, cost and volume are unfavorable for promoting and application all near the twice of single piezoelectric stack pump.
Summary of the invention
The utility model proposes a kind of double-piston serial and drive piezoelectric stack pump, to solve the little problem of output flow of piezoelectric stack pump.
The technological scheme that the utility model is taked is: fixedly there are upper shell and lower end cap in the two ends up and down of the pump housing by screw respectively, and the pump housing is provided with epicoele and the cavity of resorption that is separated by dividing plate, and described epicoele and cavity of resorption are communicated with by the piston hole on the described dividing plate; Be crimped with elastic diaphragm between the pump housing and the upper shell; The compression chamber piston places in the epicoele of the pump housing and by screw and is connected with elastic diaphragm and jacking block, and the upper surface of jacking block leans on the inwall of upper shell; Adjusting screw is fixed on the upper shell, and turns round the piezoelectric stack that pad will place the upper shell inner chamber and be squeezed on the jacking block by anti-; The small end of ladder-type pump chamber piston and big end place respectively in the cavity of resorption of piston hole on the dividing plate and the pump housing, and the small end of pump chamber piston is provided with one-way valve; The small end of pump chamber piston and one-way valve placed on it and compression chamber piston and the pump housing constitute compression chamber jointly; Lower end cap is squeezed on the dividing plate by the big end of balance spring with the pump chamber piston, the big end of pump chamber piston and the pump housing, lower end cap and the inlet valve and the outlet valve that are arranged on the lower end cap constitute pump chamber jointly, the big end of pump chamber piston and the pump housing and dividing plate constitute buffer cavity jointly, and buffer cavity communicates with ambient atmosphere by the through hole that is arranged on the pump housing; Compression chamber is communicated with by one-way valve with pump chamber.
During Installation and Debugging, first-selected inject high-pressure liquid and one-way valve is opened in pump chamber, fluid enters compression chamber by pump chamber, and the high output pressure when guaranteeing that the compression chamber fluid pressure is worked greater than piezoelectric pump, is in closed condition all the time to guarantee one-way valve; Behind the compression chamber fill fluid, the compression chamber piston is under fluid pressure action topmost and jacking block is squeezed on the inwall of upper shell, simultaneously, the pump chamber piston also is under the effect of compression chamber fluid and balance spring topmost, and namely the big end of pump chamber piston leans on dividing plate; At last, by adjusting screw piezoelectric stack is leaned on jacking block, and guarantee that piezoelectric stack is not subjected to pretightening force or pretightening force less, thereby guarantee that piezoelectric stack has bigger driving and deformability when work.
During the piezoelectric pump inoperative, piezoelectric stack no electric circuit, compression chamber piston and pump chamber piston all are in topmost, compression chamber and pump chamber maximum; When piezoelectric stack energising and voltage constantly raise, piezoelectric stack begins elongation and promotes jacking block, pump chamber barrier film and piston to move downward, move downward thereby the compression chamber fluid pressure is increased and promote the pump chamber piston, cause the increase of pump chamber fluid pressure, outlet valve unlatching, inlet valve to be closed, the pump chamber inner fluid is discharged through outlet valve; When driving voltage commutation and voltage constantly reduced, piezoelectric stack began to shrink under the acting in conjunction of pump chamber barrier film and compression chamber fluid pressure, and drove the compression chamber piston and move upward, and caused that the compression chamber volume increases, hydrodynamic pressure reduces; Simultaneously, the pump chamber piston moves upward under balance spring and the effect of compression chamber fluid, and pump chamber increase, outlet valve are closed, and fluid is entered by inlet valve; When driving voltage was down to 0, piezoelectric stack, compression chamber piston and pump chamber position of piston all returned to original state, so far finished a work cycle.
Make that the elongation of piezoelectric stack under the voltage effect is that the amount of movement of compression chamber piston is l, then the amount of movement of pump chamber piston is L=(R
s/ R
Xx)
2L, the cavity volume variable quantity that compression chamber piston and pump chamber piston produce when moving downward is respectively V
s=π R
s 2L and
So adopting the flow of dual plunger arrangement piezoelectric pump is the n=V of direct-push type piezoelectric pump flow
x/ V
s=(R
Xd/ R
Xx)
2Doubly, R in the formula
sBe compression chamber piston radius, R
XxAnd R
XdBe respectively pump chamber piston small end and big end radius; Big small end radius ratio as the pump chamber piston is 4, and then the flow of pump can improve 16 times.
The utility model characteristic and advantage are: be power source with a piezoelectric stack 1., by two piston actuated fluids by the fluid compression chamber series connection that can fill voluntarily, under the prerequisite that does not increase fabricating cost and overall volume, can increase substantially the output flow of pump, the flow increase rate be the big small end radius of pump chamber piston ratio square; 2. be not subjected to fluid pressure action during the piezoelectric stack inoperative, energising its elongation of back and energy converting between mechanical efficient height.
Description of drawings
Structural profile schematic representation when Fig. 1 is a preferred embodiment piezoelectric pump of the utility model inoperative;
Structural profile schematic representation when Fig. 2 is a preferred embodiment piezoelectric pump discharge of the utility model fluid;
Fig. 3 is the structural profile schematic representation of a preferred embodiment pump housing of the utility model.
Embodiment
Fixedly there are upper shell 4 and lower end cap 9 in the two ends up and down of the pump housing 7 by screw respectively, and the pump housing 7 is provided with epicoele C1 and the cavity of resorption C2 that is separated by dividing plate 71, and described epicoele C1 and cavity of resorption C2 are communicated with by the piston hole 72 on the described dividing plate 71; Be crimped with elastic diaphragm 6 between the pump housing 7 and the upper shell 4; Compression chamber piston 8 places in the epicoele C1 of the pump housing 7 and by screw and is connected with elastic diaphragm 6 and jacking block 5, and the upper surface of jacking block 5 leans on the inwall 42 of upper shell 4; Adjusting screw 1 is fixed on the upper shell 4, and turns round the piezoelectric stack 3 that pad 2 will place the inner chamber 41 of upper shell 4 and be squeezed on the jacking block 5 by anti-; The small end 131 of ladder-type pump chamber piston 13 and big end 132 place respectively in the cavity of resorption C2 of piston hole 72 on the dividing plate 71 and the pump housing 7, and the small end 131 of pump chamber piston 13 is provided with one-way valve 14; The small end 131 of pump chamber piston 13 and one-way valve placed on it 14 and compression chamber piston 8 and the pump housing 7 common formation compression chamber C11; Lower end cap 9 is squeezed on the dividing plate 71 by the big end 132 of balance spring 12 with pump chamber piston 13, the big end 132 of pump chamber piston 13 and the pump housing 7, lower end cap 9 and the inlet valve 11 and the outlet valve 10 that are arranged on the lower end cap 9 constitute pump chamber C21 jointly, the big end 132 of pump chamber piston 13 and the pump housing 7 and dividing plate 71 common formation buffer cavity C22, buffer cavity C22 communicates with ambient atmosphere by the through hole 73 that is arranged on the pump housing 7; Compression chamber C11 is communicated with by one-way valve 14 with pump chamber C21.
During Installation and Debugging, first-selection is blocked outlet valve 12 and is injected high-pressure liquid from inlet valve 11 in pump chamber C21, and the rising of pump chamber C21 fluid pressure is opened one-way valve 14, and fluid enters compression chamber C11 and makes the hydrodynamic pressure in it is P1; Open outlet valve 12 then, the reduction of pump chamber C21 fluid pressure, one-way valve 14 are closed; For guaranteeing that one-way valve 14 is in closed condition all the time in the piezoelectric pump working procedure, the maximum delivery pressure P0 when the hydrodynamic pressure P1 in the compression chamber C11 should work greater than piezoelectric pump; After compression chamber C11 fill fluid finishes, compression chamber piston 8 is being under hydrodynamic pressure and the elastic diaphragm effect topmost and jacking block 5 is being squeezed on the inwall 42 of upper shell 4, simultaneously, pump chamber piston 13 also is under the effect of compression chamber fluid and balance spring 12 topmost, and namely the big end 132 of pump chamber piston 13 leans on dividing plate 71; At last, by adjusting screw 1 piezoelectric stack 3 is leaned on jacking block 5, and guarantee that piezoelectric stack 3 is not subjected to pretightening force or pretightening force less, thereby guarantee that piezoelectric stack 3 has bigger driving and deformability when work.
During the piezoelectric pump inoperative, piezoelectric stack 3 no electric circuits, compression chamber piston 8 and pump chamber piston 13 all are in topmost, the volume maximum of compression chamber C11 and pump chamber C21; Piezoelectric stack 3 is switched on and in half operation cycle that voltage constantly raises, piezoelectric stack begins elongation and promote jacking block 5, pump chamber barrier film 6 and piston 8 to move downward, thereby makes the increase of compression chamber C11 fluid pressure; Ever-increasing hydrodynamic pressure moves downward pump chamber piston 13 in the compression chamber C11, so pump chamber C21 volume reduces, its fluid pressure increases, outlet valve 10 is opened, inlet valve 11 cuts out thereby make, and the fluid in the pump chamber C21 is discharged through outlet valve 10; When the driving voltage commutation, be that driving voltage is in half operation cycle from high to low, piezoelectric stack 3 begins to shrink under the acting in conjunction of pump chamber barrier film 7 and compression chamber C11 fluid pressure, and drives compression chamber piston 8 and move upward, and causes the volume of compression chamber C11 to increase, hydrodynamic pressure reduces; Simultaneously, pump chamber piston 13 moves upward under the effect of balance spring 12 and ever-reduced compression chamber C11 fluid pressure, and the increase of pump chamber C21 volume, outlet valve 10 are closed, and fluid is entered by inlet valve 11; When the driving voltage of piezoelectric stack 3 was down to 0, the position of piezoelectric stack 3, compression chamber piston 8 and pump chamber piston 13 all returned to original state, so far finished a work cycle.
Make that the elongation of piezoelectric stack 3 under the voltage effect is that the amount of movement of compression chamber piston 8 is l, then the amount of movement of pump chamber piston 13 is L=(R
s/ R
Xx)
2L, the cavity volume variable quantity that compression chamber piston 8 and pump chamber piston 13 produce when moving downward is respectively V
s=π R
s 2L and
So adopting the flow of dual plunger arrangement piezoelectric pump is the n=V of direct-push type piezoelectric pump flow
x/ V
s=(R
Xd/ R
Xx)
2Doubly, R in the formula
sRadius, R for compression chamber piston 8
XxRadius, R for the small end 131 of pump chamber piston 13
XdRadius for the big end 132 of pump chamber piston 13; Big small end radius ratio as pump chamber piston 13 is 4, and then the flow of pump can improve 16 times.
Claims (1)
1. the piezoelectric stack pump that drives of a double-piston serial, it is characterized in that: the pump housing fixedly has upper shell and lower end cap by screw respectively in two ends up and down, the pump housing is provided with epicoele and the cavity of resorption that is separated by dividing plate, and described epicoele and cavity of resorption are communicated with by the piston hole on the dividing plate; Be crimped with elastic diaphragm between the pump housing and the upper shell; The compression chamber piston places in the epicoele of the pump housing and by screw and is connected with elastic diaphragm and jacking block, and the upper surface of jacking block leans on the inwall of upper shell; Adjusting screw is fixed on the upper shell, and turns round the piezoelectric stack that pad will place the upper shell inner chamber and be squeezed on the jacking block by anti-; The small end of ladder-type pump chamber piston and big end place respectively in the cavity of resorption of piston hole on the dividing plate and the pump housing, and the small end of pump chamber piston is provided with one-way valve; The small end of pump chamber piston and one-way valve placed on it and compression chamber piston and the pump housing constitute compression chamber jointly; Lower end cap is squeezed on the dividing plate by the big end of balance spring with the pump chamber piston, the big end of pump chamber piston and the pump housing, lower end cap and the inlet valve and the outlet valve that are arranged on the lower end cap constitute pump chamber jointly, the big end of pump chamber piston and the pump housing and dividing plate constitute buffer cavity jointly, and buffer cavity communicates with ambient atmosphere by the through hole that is arranged on the pump housing; Compression chamber is communicated with by one-way valve with pump chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220691019 CN203067242U (en) | 2012-12-13 | 2012-12-13 | Double-piston tandem-driving piezoelectric stack pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220691019 CN203067242U (en) | 2012-12-13 | 2012-12-13 | Double-piston tandem-driving piezoelectric stack pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203067242U true CN203067242U (en) | 2013-07-17 |
Family
ID=48766035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220691019 Withdrawn - After Issue CN203067242U (en) | 2012-12-13 | 2012-12-13 | Double-piston tandem-driving piezoelectric stack pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203067242U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966521A (en) * | 2012-12-13 | 2013-03-13 | 浙江师范大学 | Piezo-stack pump capable of driving double-piston in tandem connection |
| CN106401921A (en) * | 2016-11-08 | 2017-02-15 | 绍兴职业技术学院 | Micro piezoelectric underwater propulsion robot |
-
2012
- 2012-12-13 CN CN 201220691019 patent/CN203067242U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966521A (en) * | 2012-12-13 | 2013-03-13 | 浙江师范大学 | Piezo-stack pump capable of driving double-piston in tandem connection |
| CN102966521B (en) * | 2012-12-13 | 2015-04-29 | 浙江师范大学 | Piezo-stack pump capable of driving double-piston in tandem connection |
| CN106401921A (en) * | 2016-11-08 | 2017-02-15 | 绍兴职业技术学院 | Micro piezoelectric underwater propulsion robot |
| CN106401921B (en) * | 2016-11-08 | 2018-05-29 | 绍兴职业技术学院 | A kind of miniature piezoelectric underwater propulsion robot |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5058426B2 (en) | Control device for hydraulic press and operation method of hydraulic press | |
| CN102966521B (en) | Piezo-stack pump capable of driving double-piston in tandem connection | |
| CN102678528A (en) | Series-parallel hybrid-driven piezoelectric pump | |
| CN101566175B (en) | Gas pressurized device | |
| CN102678527A (en) | Piezoelectric vibrator bilateral fluid driven series connection pump | |
| CN202597033U (en) | Series-parallel connection combination driving piezoelectric pump | |
| CN203067242U (en) | Double-piston tandem-driving piezoelectric stack pump | |
| CN205243798U (en) | Hydraulic pressure enlargies formula piezoelectric stack pump | |
| CN101922442A (en) | Dual-cavity dual-drive piezoelectric stack pump | |
| CN203146284U (en) | Air valve component for double-chamber diaphragm pump | |
| CN102032156B (en) | Hydraulic oil suction pump with bidirectional plunger | |
| CN202579118U (en) | Serial pump for driving fluid on double sides of piezoelectric vibrator | |
| CN100552218C (en) | Multi-purpose hydraulic negative-feedback pump | |
| CN209925158U (en) | Energy-saving system for water injection pump of oil field | |
| CN201513310U (en) | Reciprocating piston pump | |
| CN205315220U (en) | Plunger type piezoelectric stack pump | |
| CN2559811Y (en) | Hydraulic driving stepless speed regulating double-effect booster pump | |
| CN105221377B (en) | A kind of high-lift piston pump of water attack drive-type | |
| CN201908815U (en) | Two-way plunger hydraulic oil well pump | |
| CN110094317B (en) | Oil field water injection pump economizer system | |
| CN107191160B (en) | Double-plunger submersible diaphragm pump system and relay lifting method thereof | |
| CN203532126U (en) | Switching valve of high-pressure common-rail fuel injection pump | |
| CN107842530B (en) | A kind of hydraulic system of high speed formed punch | |
| CN207437338U (en) | A kind of intelligent hydraulic pump | |
| CN112196756B (en) | Piezoelectric stack double-plunger pump capable of amplifying swing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130717 Effective date of abandoning: 20150429 |