CN112049781A - Passive valve piezoelectric pump with amplifying mechanism - Google Patents
Passive valve piezoelectric pump with amplifying mechanism Download PDFInfo
- Publication number
- CN112049781A CN112049781A CN202011047123.2A CN202011047123A CN112049781A CN 112049781 A CN112049781 A CN 112049781A CN 202011047123 A CN202011047123 A CN 202011047123A CN 112049781 A CN112049781 A CN 112049781A
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- Prior art keywords
- pump
- piezoelectric
- valve
- amplifying mechanism
- bolt
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- Pending
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000006872 improvement Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/04—Pumps having electric drive
- F04B43/043—Micropumps
- F04B43/046—Micropumps with piezoelectric drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
- H02N2/043—Mechanical transmission means, e.g. for stroke amplification
Abstract
The invention discloses a passive valve piezoelectric pump with an amplifying mechanism; the device comprises a pump cover, a sealing cover, an amplifying mechanism, a piezoelectric stack, a connecting block, a pump body, a hexagon head bolt and a nut; the pump body is provided with an upper flow passage and a lower flow passage and is provided with a passive stop valve. In the invention, the piezoelectric stack applies an electric signal, when the piezoelectric stack is extended, the film deforms outwards, liquid flows out of the pump body, when the piezoelectric stack is shortened, the film deforms inwards, and the liquid is sucked into the pump body; in order to improve the flow rate of the piezoelectric pump, the invention is provided with an amplifying mechanism which is used for converting the transverse elongation of the stack into the longitudinal direction and amplifying the displacement of the stack, thereby improving the performance of the piezoelectric pump.
Description
Technical Field
The invention relates to a passive valve piezoelectric pump with an amplifying mechanism, and belongs to the field of fluid machinery.
Background
Piezoelectric micropumps have gained continuous research and extensive attention from research institutions around the world since the 70's of the 20 th century. The piezoelectric diaphragm pump is divided into a valveless piezoelectric diaphragm pump and a valved piezoelectric diaphragm pump according to the existence or nonexistence of a valve, the valved piezoelectric diaphragm pump is divided into an active valve piezoelectric diaphragm pump and a passive valve piezoelectric diaphragm pump, the output performance of the active valve piezoelectric diaphragm pump and the cut-off performance of the valve are good, but the structure is complex, the structure of the passive piezoelectric diaphragm pump is simple, and the cut-off performance of the valve is poor.
Disclosure of Invention
Aiming at the problems existing at present, the invention provides a piezoelectric stack pump which can amplify stack displacement and improve pumping efficiency.
The technical scheme adopted by the invention is as follows: a passive valve piezoelectric pump with an amplification mechanism comprises a pump cover (1), a sealing cover (2), an amplification mechanism (3), a piezoelectric stack (4), a pump body (5), a hexagonal head bolt (6-1) and a nut (6-2);
the pump cover (1) is provided with a hexagon bolt hole (1-1), the amplifying mechanism (3) consists of a short connecting rod (3-4), a long connecting rod (3-5), a small bolt (3-1), a large bolt (3-2) and a connecting block (3-3), the short connecting rod (3-4) is provided with a small bolt hole (3-6), the long connecting rod (3-5) is provided with a small bolt hole (3-6) and a large bolt hole (3-7), the small bolt hole (3-6) is matched with the small bolt (3-1), the large bolt hole (3-7) is matched with the large bolt (3-2), the connecting block (3-3) is provided with a threaded hole (3-8), and the threaded hole (3-8) is matched with the small bolt (3-1), the connecting mode of the connecting block (3-3) and the piezoelectric stack (4) is adhesion, the pump body (5) is provided with a liquid inlet (5-1), a bolt hole (5-2), an upper flow channel (5-3), a lower flow channel (5-4), an inlet valve (5-5), an outlet valve (5-6), a lower cavity (5-7), an upper cavity (5-8), an elastic film (5-9), a liquid outlet (5-10), a liquid outlet (5-11), a lead pipe (5-12), a lead pipe (5-13) and an L-shaped groove (5-15), the connecting mode of the elastic film (5-9) and the pump wall (5-14) is adhesion, the connecting mode of the elastic film (5-9) and the amplifying mechanism (3) is adhesion, and the connecting mode of the sealing cover (2), the elastic film (5-9) and the pump wall (5-14) is adhesion The mode is adhesion, the inlet valve (5-5) and the outlet valve (5-6) are connected with the pump wall (5-14) in a mode that the inlet valve (5-5) and the outlet valve (5-6) are fixed in an L-shaped groove (5-15) with the thickness equal to that of the inlet valve (5-5) and the outlet valve (5-6), and the pump cover (1) and the pump body (5) are matched through a hexagon head bolt (6-1) and a nut (6-2) to achieve the purpose of assembling the whole pump;
as a further improvement of the above technical scheme, an amplifying mechanism (3) is arranged in the pump body (5), when the piezoelectric stack (4) is electrified and elongated, the amplifying mechanism (3) can convert the transverse displacement of the piezoelectric stack (4) into the longitudinal displacement and amplify the displacement of the piezoelectric stack (4), so as to improve the output flow of the piezoelectric pump;
as a further improvement of the technical scheme, the inlet valve (5-5) and the outlet valve (5-6) are connected with the pump wall (5-14) in a mode that the inlet valve (5-5) and the outlet valve (5-6) are fixed in an L-shaped groove (5-15) which is equal to the inlet valve (5-5) and the outlet valve (5-6) in thickness, so that screw connection is omitted, the design is simple, and the assembly is convenient.
The invention has the beneficial effects that:
the pump body is internally provided with the amplifying mechanism which can amplify the displacement of the piezoelectric stack, so that the output flow of the piezoelectric pump is improved;
the valve in the pump body is mounted in the L-shaped groove with the thickness equal to that of the valve plate, so that the valve is simple to assemble.
Drawings
Fig. 1 is a schematic external view of the present invention.
Fig. 2 shows an exploded view of the present invention.
Fig. 3 is a schematic diagram of the pump cover structure of the present invention.
Fig. 4 is a schematic diagram of the pump body structure of the present invention.
Fig. 5 is a schematic view of the structure of the lead tube of the present invention.
Fig. 6 is a schematic view showing the structure of the enlarging mechanism of the present invention.
Fig. 7 is a schematic view of the long link structure of the present invention.
Fig. 8 is a schematic view of the structure of the short link according to the present invention.
Fig. 9 is a schematic view showing the structure of the connecting block of the present invention.
Detailed Description
The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
Referring to fig. 1 to 9, in an embodiment of the present invention, the structure includes:
a passive valve piezoelectric pump with an amplification mechanism comprises a pump cover (1), a sealing cover (2), the amplification mechanism (3), a piezoelectric stack (4), a pump body (5), a hexagonal bolt (6-1) and a nut (6-2), wherein the pump cover (1) is provided with the hexagonal bolt hole (1-1), the amplification mechanism (3) comprises a short connecting rod (3-4), a long connecting rod (3-5), a small bolt (3-1), a large bolt (3-2) and a connecting block (3-3), the short connecting rod (3-4) is provided with the small bolt hole (3-6), the long connecting rod (3-5) is provided with the small bolt hole (3-6) and the large bolt hole (3-7), the small bolt hole (3-6) is matched with the small bolt (3-1), the large bolt hole (3-7) is matched with the large bolt (3-2), a threaded hole (3-8) is formed in the connecting block (3-3), the threaded hole (3-8) is matched with the small bolt (3-1), the connecting block (3-3) is connected with the piezoelectric stack (4) in an adhesion mode, a liquid inlet (5-1), the bolt hole (5-2), an upper flow channel (5-3), a lower flow channel (5-4), an inlet valve (5-5), an outlet valve (5-6), a lower cavity (5-7), an upper cavity (5-8), an elastic film (5-9), a liquid outlet (5-10), a liquid outlet (5-11), a lead pipe (5-12), a lead pipe (5-13), L-shaped grooves (5-15), the elastic film (5-9) and the pump wall (5-14) are connected in an adhesion manner, the elastic film (5-9) is connected with the amplifying mechanism (3) in an adhesion manner, the sealing cover (2) is connected with the elastic film (5-9) and the pump wall (5-14) in an adhesion manner, the inlet valve (5-5), the outlet valve (5-6) and the pump wall (5-14) are connected in a way that the inlet valve (5-5) and the outlet valve (5-6) are fixed in an L-shaped groove (5-15) with the same thickness as the inlet valve (5-5) and the outlet valve (5-6), the pump cover (1) and the pump body (5) are matched by a hexagonal head bolt (6-1) and a nut (6-2) to achieve the purpose of assembling the whole pump;
as a further improvement of the above technical scheme, an amplifying mechanism (3) is arranged in the pump body (5), when the piezoelectric stack (4) is electrified and elongated, the amplifying mechanism (3) can convert the transverse displacement of the piezoelectric stack (4) into the longitudinal displacement and amplify the displacement of the piezoelectric stack (4), so as to improve the output flow of the piezoelectric pump;
as a further improvement of the technical scheme, the inlet valve (5-5) and the outlet valve (5-6) are connected with the pump wall (5-14) in a mode that the inlet valve (5-5) and the outlet valve (5-6) are fixed in an L-shaped groove (5-15) which is equal to the inlet valve (5-5) and the outlet valve (5-6) in thickness, so that screw connection is omitted, the design is simple, and the assembly is convenient.
The working process of the invention is divided into a first working process and a second working process:
the first working process comprises the following steps: applying an electric signal to the piezoelectric stack (4), extending the piezoelectric stack (4), pushing the connecting block (3-3) and further pushing the amplifying mechanism (3) positioned in the middle, longitudinally extending the amplifying mechanism (3) to enable the elastic film (5-9) to deform outwards, further reducing the volumes of the lower pump cavity (5-7) and the upper pump cavity (5-8), increasing the pressure, opening the outlet valve (5-6), closing the inlet valve (5-5), and discharging the lower pump cavity (5-7) and the upper pump cavity (5-8) out of the pump body (5) through the liquid outlets (5-11) and the liquid outlets (5-10) respectively;
the second working process: the electric signal of the piezoelectric stack (4) is removed, the piezoelectric stack (4) is restored to the original length, the connecting block (3-3) is close to the pump wall (5-14) under the action of the piezoelectric stack (4), the two ends of the amplifying mechanism (3) deform towards the middle under the action of the connecting block (3-3), thereby driving the elastic film (5-9) to deform inwards, further enlarging the volumes of the lower pump cavity (5-7) and the upper pump cavity (5-8), reducing the pressure, closing the outlet valve (5-6), opening the inlet valve (5-5), leading the liquid to enter the upper flow passage (5-3) and the lower flow passage (5-4) from the liquid inlet (5-1), and then respectively enter the upper pump cavity (5-8) and the lower pump cavity (5-7), and continuous output of liquid is realized through the cyclic work of the two working processes.
The principles and embodiments of the present invention have been described herein using specific examples, which are intended to facilitate an understanding of the principles and core concepts of the invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. A passive valve piezoelectric pump with an amplification mechanism comprises a pump cover (1), a sealing cover (2), the amplification mechanism (3), a piezoelectric stack (4), a pump body (5), a hexagonal bolt (6-1) and a nut (6-2), wherein the pump cover (1) is provided with the hexagonal bolt hole (1-1), the amplification mechanism (3) comprises a short connecting rod (3-4), a long connecting rod (3-5), a small bolt (3-1), a large bolt (3-2) and a connecting block (3-3), the short connecting rod (3-4) is provided with the small bolt hole (3-6), the long connecting rod (3-5) is provided with the small bolt hole (3-6) and the large bolt hole (3-7), the small bolt hole (3-6) is matched with the small bolt (3-1), the large bolt hole (3-7) is matched with the large bolt (3-2), a threaded hole (3-8) is formed in the connecting block (3-3), the threaded hole (3-8) is matched with the small bolt (3-1), the connecting block (3-3) is connected with the piezoelectric stack (4) in an adhesion mode, a liquid inlet (5-1), the bolt hole (5-2), an upper flow channel (5-3), a lower flow channel (5-4), an inlet valve (5-5), an outlet valve (5-6), a lower cavity (5-7), an upper cavity (5-8), an elastic film (5-9), a liquid outlet (5-10), a liquid outlet (5-11), a lead pipe (5-12), a lead pipe (5-13), L-shaped grooves (5-15), the elastic film (5-9) and the pump wall (5-14) are connected in an adhesion manner, the elastic film (5-9) is connected with the amplifying mechanism (3) in an adhesion manner, the sealing cover (2) is connected with the elastic film (5-9) and the pump wall (5-14) in an adhesion manner, the inlet valve (5-5), the outlet valve (5-6) and the pump wall (5-14) are connected in a way that the inlet valve (5-5) and the outlet valve (5-6) are fixed in an L-shaped groove (5-15) with the same thickness as the inlet valve (5-5) and the outlet valve (5-6), the pump cover (1) and the pump body (5) are matched through a hexagonal head bolt (6-1) and a nut (6-2), and the purpose of assembling the whole pump is achieved.
2. A passive valve piezoelectric pump having an amplifying mechanism according to claim 1, wherein the pump body (5) is provided with an amplifying mechanism (3), when the piezoelectric stack (4) is electrically elongated, the amplifying mechanism (3) can convert the transverse displacement of the piezoelectric stack (4) into a longitudinal displacement and amplify the displacement of the piezoelectric stack (4), thereby increasing the output flow of the piezoelectric pump.
3. A passive valve piezoelectric pump having an amplifying mechanism according to claim 1, wherein the inlet valve (5-5) and the outlet valve (5-6) are connected to the pump wall (5-14) in such a manner that the inlet valve (5-5) and the outlet valve (5-6) are fixed in L-shaped grooves (5-15) having the same thickness as the inlet valve (5-5) and the outlet valve (5-6), thereby eliminating screw connection, and having simple design and easy assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047123.2A CN112049781A (en) | 2020-09-29 | 2020-09-29 | Passive valve piezoelectric pump with amplifying mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047123.2A CN112049781A (en) | 2020-09-29 | 2020-09-29 | Passive valve piezoelectric pump with amplifying mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112049781A true CN112049781A (en) | 2020-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011047123.2A Pending CN112049781A (en) | 2020-09-29 | 2020-09-29 | Passive valve piezoelectric pump with amplifying mechanism |
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| CN (1) | CN112049781A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6294859B1 (en) * | 1997-09-10 | 2001-09-25 | Eads Deutschland Gmbh | Electrostrictive or piezoelectric actuator device with a stroke amplifying transmission mechanism |
| JP2002371967A (en) * | 2001-06-15 | 2002-12-26 | Hitachi Ltd | Low vibration piezopump |
| CN1908433A (en) * | 2006-08-15 | 2007-02-07 | 华南农业大学 | Two-chamber valveless piezoelectric pump |
| JP2008196485A (en) * | 2007-02-09 | 2008-08-28 | Cooler Master Co Ltd | Thin film pump and device equipped therewith |
| CN103022339A (en) * | 2012-12-28 | 2013-04-03 | 东南大学 | Orthogonal piezoelectric displacement amplifying mechanism |
| CN103388578A (en) * | 2013-08-18 | 2013-11-13 | 吉林大学 | Mutually-inductive piezoelectric equal-proportion blending pump |
| CN108302016A (en) * | 2018-03-13 | 2018-07-20 | 广州大学 | A kind of passive valve piezoelectric pump of continuous fluid |
| CN108771784A (en) * | 2018-06-22 | 2018-11-09 | 杨阳 | A kind of high-precision syringe using piezoelectric stack |
| CN108847781A (en) * | 2018-06-12 | 2018-11-20 | 湖北三江航天红林探控有限公司 | A kind of big stroke actuator based on Piezoelectric Ceramic |
| CN110761965A (en) * | 2019-12-11 | 2020-02-07 | 潍坊聚德电子有限公司 | Micro-flow pump |
| CN210898979U (en) * | 2019-12-21 | 2020-06-30 | 邦瓷电子科技(盐城)有限责任公司 | Flexible hinge amplifying mechanism for piezoelectric driver displacement amplification |
-
2020
- 2020-09-29 CN CN202011047123.2A patent/CN112049781A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6294859B1 (en) * | 1997-09-10 | 2001-09-25 | Eads Deutschland Gmbh | Electrostrictive or piezoelectric actuator device with a stroke amplifying transmission mechanism |
| JP2002371967A (en) * | 2001-06-15 | 2002-12-26 | Hitachi Ltd | Low vibration piezopump |
| CN1908433A (en) * | 2006-08-15 | 2007-02-07 | 华南农业大学 | Two-chamber valveless piezoelectric pump |
| JP2008196485A (en) * | 2007-02-09 | 2008-08-28 | Cooler Master Co Ltd | Thin film pump and device equipped therewith |
| CN103022339A (en) * | 2012-12-28 | 2013-04-03 | 东南大学 | Orthogonal piezoelectric displacement amplifying mechanism |
| CN103388578A (en) * | 2013-08-18 | 2013-11-13 | 吉林大学 | Mutually-inductive piezoelectric equal-proportion blending pump |
| CN108302016A (en) * | 2018-03-13 | 2018-07-20 | 广州大学 | A kind of passive valve piezoelectric pump of continuous fluid |
| CN108847781A (en) * | 2018-06-12 | 2018-11-20 | 湖北三江航天红林探控有限公司 | A kind of big stroke actuator based on Piezoelectric Ceramic |
| CN108771784A (en) * | 2018-06-22 | 2018-11-09 | 杨阳 | A kind of high-precision syringe using piezoelectric stack |
| CN110761965A (en) * | 2019-12-11 | 2020-02-07 | 潍坊聚德电子有限公司 | Micro-flow pump |
| CN210898979U (en) * | 2019-12-21 | 2020-06-30 | 邦瓷电子科技(盐城)有限责任公司 | Flexible hinge amplifying mechanism for piezoelectric driver displacement amplification |
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