CN115111143B - Valve-free piezoelectric pump with inner dip arrow-shaped fluid-blocking cambered surface cavity - Google Patents
Valve-free piezoelectric pump with inner dip arrow-shaped fluid-blocking cambered surface cavity Download PDFInfo
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- CN115111143B CN115111143B CN202210754410.XA CN202210754410A CN115111143B CN 115111143 B CN115111143 B CN 115111143B CN 202210754410 A CN202210754410 A CN 202210754410A CN 115111143 B CN115111143 B CN 115111143B
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- Prior art keywords
- pump
- runner
- arrow
- cavity
- piezoelectric
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- 238000007789 sealing Methods 0.000 claims abstract description 34
- 239000012530 fluid Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 12
- 239000007788 liquid Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 10
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005459 micromachining Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses an inner dip angle arrow flow blocking body cambered surface cavity valveless piezoelectric pump which comprises a pump body, a pump cover, a piezoelectric vibrator, a sealing ring, a bolt and a nut. The pump body is internally provided with an arc surface cavity and an inner inclination arrow fluid-blocking body, when liquid flows through the conical surface of the inner inclination arrow fluid-blocking body and the arc surface of the arc surface cavity, the flow resistance is smaller, and when liquid flows through the tail end rectangular surface of the inner inclination arrow fluid-blocking body, the inner inclination inclined surface and the side rectangular surface of the arc surface cavity, the flow resistance is larger. The invention ensures that the output flow of the pump is larger by the matching of the inner dip angle arrow baffle body and the cambered surface cavity, and the pump cavity of the pump is of a planar structure, thereby being easy for microminiaturization processing.
Description
Technical Field
The invention belongs to the field of micro-fluid machinery, and particularly relates to a valveless piezoelectric pump with an inner dip angle arrow flow blocking body cambered surface cavity.
Background
Piezoelectric pumps are controllers and actuators for micro-fluid drive systems based on piezoelectric drive technology, and have been rapidly developed with the development of micro-electromechanical systems in micromachining technology. As an important branch of a piezoelectric pump, the valveless piezoelectric pump takes a piezoelectric vibrator as a power source, the periodic change of the volume of a pump cavity is caused by the mechanical vibration of the piezoelectric vibrator, and the valve of a motionless component with a special structure is used for realizing a novel fluid driver for unidirectional fluid flow. Most of the existing valveless piezoelectric pumps have the defects of small output flow, difficult microminiaturization processing and the like, and are difficult to meet the actual application demands. Therefore, the development of a novel valveless piezoelectric pump with large output flow and easy microminiaturization processing has very important practical significance.
Disclosure of Invention
The invention aims to provide the valve-free piezoelectric pump with the inner dip arrow fluid-blocking cambered surface cavity, which can effectively enhance the fluid transportation capacity of the pump through the matching of the cambered surface cavity and the inner dip arrow fluid-blocking body, has larger output flow, has a planar structure with simple structure in the pump cavity, and is easy for microminiaturization processing.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a valve-free piezoelectric pump with an inner dip arrow and a fluid-blocking cambered surface cavity comprises a pump cover, a piezoelectric vibrator, a pump body, bolts, sealing rings and nuts.
The pump cover is provided with an annular flange structure, an upper sealing ring groove and an upper bolt hole, the annular flange structure of the pump cover is used for pressing the piezoelectric vibrator, and the upper sealing ring groove of the pump cover is used for placing a sealing ring;
the piezoelectric vibrator consists of a metal substrate and a piezoelectric wafer, and the piezoelectric wafer is a driving element made of piezoelectric ceramic materials;
the pump body is provided with a runner inlet, a runner outlet, an arc-shaped cavity, 4 inner dip arrow flow blocking bodies, a lower sealing ring groove and a lower bolt hole, wherein the runner inlet comprises an inlet outer runner and an inlet inner runner, the diameter of the inlet outer runner is larger than that of the inlet inner runner and is used for preventing an inlet flow pipe from being inserted into the arc-shaped cavity, the runner outlet comprises an outlet outer runner and an outlet inner runner, the diameter of the outlet outer runner is larger than that of the outlet inner runner and is used for preventing an outlet flow pipe from being inserted into the arc-shaped cavity, the arc-shaped cavity comprises 3 groups of arc-shaped surfaces with smaller flow resistance and side rectangular surfaces with larger flow resistance, the arc-shaped surfaces are approximate streamline, the inner dip arrow flow blocking bodies comprise tail end rectangular surfaces with larger flow resistance, inner dip inclined surfaces with smaller flow resistance, the inner dip angles formed by the inner dip arrow flow blocking bodies with the side edges are 30-60 degrees, and the vertex angles of the cone surfaces are 60 degrees;
the sealing ring is two same annular rubber rings, one is placed between the upper sealing ring groove and the piezoelectric vibrator, the other is placed between the lower sealing ring groove and the piezoelectric vibrator, the sealing ring plays a role in sealing and supporting the piezoelectric vibrator, and the bolt and the nut are in threaded connection and are used for tightly matching the pump cover and the pump body.
The inner dip angle arrow flow blocking body cambered surface cavity valveless piezoelectric pump comprises two working processes of fluid suction and fluid discharge:
inhalation process: under the effect of orthogonal flow electricity, the piezoelectric vibrator upwards deforms, the volume of the closed pump cavity is increased, the pressure in the cavity is reduced, under the effect of external atmospheric pressure, liquid flows in along the inlet of the flow channel, flows through the conical surface of the inward-dip arrow-shaped blocking body and the arc-shaped surface of the cambered surface cavity, the flow resistance is small, and the liquid flows in along the outlet of the flow channel, flows through the rectangular surface of the tail end of the inward-dip arrow-shaped blocking body, the inward-dip inclined surface and the rectangular surface of the side edge of the cambered surface cavity, and the flow resistance is large, so that the flow entering the pump cavity from the inlet of the flow channel is larger than the flow entering the pump cavity from the outlet of the flow channel.
The discharging process comprises the following steps: under the action of negative alternating current, the piezoelectric vibrator deforms downwards, the volume of the closed pump cavity is reduced, the pressure in the cavity is increased, under the action of the pressure in the pump cavity, liquid flows through the conical surface of the inner dip angle arrow block body and the arc surface of the arc surface cavity and flows out along the flow channel outlet, the flow resistance is small, and the liquid flows through the tail end rectangular surface of the inner dip angle arrow block body, the inner dip angle inclined surface and the side rectangular surface of the arc surface cavity and flows out along the flow channel inlet, and the flow resistance is large, so that the flow discharged from the flow channel outlet to the pump cavity is larger than the flow discharged from the flow channel inlet to the pump cavity.
The internal inclination arrow flow blocking body cambered surface cavity valveless piezoelectric pump realizes the unidirectional flow of fluid macroscopically through the continuous circulation of the suction process and the discharge process.
The invention has the outstanding advantages that:
1. the pump body of the internal inclination arrow flow-blocking body cambered surface cavity valveless piezoelectric pump is internally provided with the cambered surface cavity and the internal inclination arrow flow-blocking body, the flow resistance of the cambered surface cavity and the conical surface of the internal inclination arrow flow-blocking body is smaller, and the flow resistance of the side rectangular surface of the cambered surface cavity, the tail rectangular surface of the internal inclination arrow flow-blocking body and the internal inclination inclined surface is larger, so that the flow resistance difference is effectively increased, and the output flow of the pump is larger.
2. The cambered surface cavity and the inner dip arrow flow blocking body in the pump cavity of the valveless piezoelectric pump are both planar structures, and are easy to microminiaturize.
Drawings
FIG. 1 is an exploded view of a valveless piezoelectric pump of the present invention having an inner tilt arrow and a choke cambered surface cavity;
FIG. 2 is a half cross-sectional view of the present invention of an inner tilt arrow flow-blocking body cambered surface cavity valveless piezoelectric pump;
FIG. 3 is a schematic diagram of the pump cap of the present invention;
fig. 4 is a schematic view of the structure of the piezoelectric vibrator of the present invention;
FIG. 5 is a schematic view of the pump body of the present invention;
FIG. 6 is a cross-sectional view of the pump body of the present invention;
FIG. 7 is a schematic illustration of the structure of the present invention with the inner dip arrow resistor;
the marks in the figure: 1 is a pump cover, 1-1 is an annular flange structure, 1-2 is an upper sealing ring groove, 1-3 is an upper bolt hole, 2 is a piezoelectric vibrator, 2-1 is a metal substrate, 2-2 is a piezoelectric wafer, 3 is a pump body, 3-1 is a runner inlet (wherein 3-1-1 is an inlet outer runner, 3-1-2 is an inlet inner runner), 3-2 is a runner outlet (wherein 3-2-1 is an outlet outer runner, 3-2-2 is an outlet inner runner), 3-3 is an arc-shaped cavity (wherein 3-3-1 is an arc-shaped surface, 3-3-2 is a side rectangular surface), 3-4 is an inward-inclination arrow-shaped fluid-blocking body (wherein 3-4-1 is a tail end rectangular surface, 3-4-2 is an inward-inclination inclined surface of the fluid-blocking body, 3-4-3 is a conical surface), 3-5 is a lower sealing ring groove, 3-6 is a lower bolt hole, 4 is a bolt, 5 is a sealing ring, and 6 is a nut.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and examples, and it is apparent that the examples are only some, but not all, examples of the present invention; all other embodiments, based on the embodiments of the invention, which a person skilled in the art would obtain without making any inventive effort, are within the scope of the invention as claimed; the description of this section is intended to be exemplary and explanatory only and should not be construed as limiting the scope of the invention.
Referring to fig. 1-7, an in-dip arrow fluid-blocking cambered surface cavity valveless piezoelectric pump comprising: the pump comprises a pump cover (1), a piezoelectric vibrator (2), a pump body (3), bolts (4), a sealing ring (5) and nuts (6).
The pump cover (1) is provided with an annular flange structure (1-1), an upper sealing ring groove (1-2) and an upper bolt hole (1-3), the annular flange structure (1-1) of the pump cover (1) is used for compressing the piezoelectric vibrator (2), and the upper sealing ring groove (1-2) of the pump cover (1) is used for placing the sealing ring (5);
the piezoelectric vibrator (2) consists of a metal substrate (2-1) and a piezoelectric wafer (2-2), and the piezoelectric wafer (2-2) is a driving element made of piezoelectric ceramic materials;
the pump body (3) is provided with a runner inlet (3-1), a runner outlet (3-2), a cambered surface cavity (3-3), 4 inner dip arrow baffle bodies (3-4), a lower sealing ring groove (3-5) and a lower bolt hole (3-6), the runner inlet (3-1) comprises an inlet outer runner (3-1-1) and an inlet inner runner (3-1-2), the diameter of the inlet outer runner (3-1-1) is larger than that of the inlet inner runner (3-1-2) and is used for preventing an inlet flow pipe from being inserted into the cambered surface cavity (3-3), the runner outlet (3-2) comprises an outlet outer runner (3-2-1) and an outlet inner runner (3-2-2), the diameter of the outlet outer runner (3-2-1) is larger than that of the outlet inner runner (3-2-2) and is used for preventing the outlet flow pipe from being inserted into the cambered surface cavity (3-3), the cambered surface cavity (3-3) comprises 3 groups of smaller cambered surfaces (3-3-1) and larger rectangular side surfaces (3-3-2) and the side surfaces are approximate to the streamline surfaces (3-3-1), the inner inclination arrow fluid-blocking body (3-4) comprises a tail end rectangular surface (3-4-1) with larger flow resistance, an inner inclination inclined surface (3-4-2) and a conical surface (3-4-3) with smaller flow resistance, wherein an inner inclination angle formed by the inner inclination inclined surface (3-4-2) and the side edge of the inner inclination arrow fluid-blocking body (3-4) is 30-60 degrees, and the vertex angle of the conical surface (3-4-3) is 60 degrees;
the sealing ring (5) is two identical annular rubber rings, one is placed between the upper sealing ring groove (1-2) and the piezoelectric vibrator (2), the other is placed between the lower sealing ring groove (3-5) and the piezoelectric vibrator (2), the sealing ring (5) plays a role in sealing and supporting the piezoelectric vibrator (2), and the bolt (4) and the nut (6) are in threaded connection and are used for tightly matching the pump cover (1) and the pump body (3).
The inner dip angle arrow flow blocking body cambered surface cavity valveless piezoelectric pump comprises two working processes of fluid suction and fluid discharge:
inhalation process: under the action of orthogonal flow, the piezoelectric vibrator (2) deforms upwards, the volume of the closed pump cavity is increased, the pressure in the cavity is reduced, and under the action of external atmospheric pressure, liquid flows in along the flow channel inlet (3-1), flows through the conical surface (3-4-3) of the inner dip arrow baffle body (3-4) and the arc surface (3-3-1) of the arc surface cavity (3-3), the flow resistance is small, and the liquid flows in along the flow channel outlet (3-2), flows through the tail rectangular surface (3-4-1) of the inner dip arrow baffle body (3-4), the inner dip inclined surface (3-4-2) and the side rectangular surface (3-3-2) of the arc surface cavity (3-3), and the flow resistance is large, so that the flow entering the pump cavity from the flow channel inlet (3-1) is larger than the flow entering the pump cavity from the flow channel outlet (3-2).
The discharging process comprises the following steps: under the action of negative alternating current, the piezoelectric vibrator (2) deforms downwards, the volume of the closed pump cavity is reduced, the pressure in the cavity is increased, under the action of the pressure in the pump cavity, liquid flows through the conical surface (3-4-3) of the inner dip arrow baffle body (3-4) and the arc surface (3-3-1) of the arc surface cavity (3-3), flows out along the flow channel outlet (3-2), the flow resistance is small, and the liquid flows through the tail end rectangular surface (3-4-1) of the inner dip arrow baffle body (3-4), the inner dip inclined surface (3-4-2) and the side rectangular surface (3-3-2) of the arc surface cavity (3-3) and flows out along the flow channel inlet (3-1), so that the flow discharged from the flow channel outlet (3-2) to the pump cavity is larger than the flow discharged from the flow channel inlet (3-1) to the pump cavity.
The internal inclination arrow flow blocking body cambered surface cavity valveless piezoelectric pump realizes the unidirectional flow of fluid macroscopically through the continuous circulation of the suction process and the discharge process.
Claims (1)
1. An inner dip arrow block fluid cambered surface cavity valveless piezoelectric pump which is characterized in that: the piezoelectric pump comprises a pump cover (1), a piezoelectric vibrator (2), a pump body (3), bolts (4), a sealing ring (5) and nuts (6);
the pump cover (1) is provided with an annular flange structure (1-1), an upper sealing ring groove (1-2) and an upper bolt hole (1-3), the annular flange structure (1-1) of the pump cover (1) is used for compressing the piezoelectric vibrator (2), and the upper sealing ring groove (1-2) of the pump cover (1) is used for placing the sealing ring (5);
the piezoelectric vibrator (2) consists of a metal substrate (2-1) and a piezoelectric wafer (2-2), and the piezoelectric wafer (2-2) is a driving element made of piezoelectric ceramic materials;
the pump body (3) is provided with a runner inlet (3-1), a runner outlet (3-2), a cambered surface cavity (3-3), 4 inner dip arrow baffle bodies (3-4), a lower sealing ring groove (3-5) and a lower bolt hole (3-6), the runner inlet (3-1) comprises an inlet outer runner (3-1-1) and an inlet inner runner (3-1-2), the diameter of the inlet outer runner (3-1-1) is larger than that of the inlet inner runner (3-1-2) and is used for preventing an inlet flow pipe from being inserted into the cambered surface cavity (3-3), the runner outlet (3-2) comprises an outlet outer runner (3-2-1) and an outlet inner runner (3-2-2), the diameter of the outlet outer runner (3-2-1) is larger than that of the outlet inner runner (3-2-2) and is used for preventing the outlet flow pipe from being inserted into the cambered surface cavity (3-3), the cambered surface cavity (3-3) comprises 3 groups of smaller cambered surfaces (3-3-1) and larger rectangular side surfaces (3-3-2) and the side surfaces are approximate to the streamline surfaces (3-3-1), the inner inclination arrow fluid-blocking body (3-4) comprises a tail end rectangular surface (3-4-1) with larger flow resistance, an inner inclination inclined surface (3-4-2) and a conical surface (3-4-3) with smaller flow resistance, wherein an inner inclination angle formed by the inner inclination inclined surface (3-4-2) and the side edge of the inner inclination arrow fluid-blocking body (3-4) is 30-60 degrees, and the vertex angle of the conical surface (3-4-3) is 60 degrees;
the sealing rings (5) are two identical annular rubber rings, one is placed between the upper sealing ring groove (1-2) and the piezoelectric vibrator (2), the other is placed between the lower sealing ring groove (3-5) and the piezoelectric vibrator (2), and the sealing rings (5) play a role in sealing and supporting the piezoelectric vibrator (2);
the bolt (4) and the nut (6) are in threaded connection and are used for tightly matching the pump cover (1) and the pump body (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210754410.XA CN115111143B (en) | 2022-06-28 | 2022-06-28 | Valve-free piezoelectric pump with inner dip arrow-shaped fluid-blocking cambered surface cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210754410.XA CN115111143B (en) | 2022-06-28 | 2022-06-28 | Valve-free piezoelectric pump with inner dip arrow-shaped fluid-blocking cambered surface cavity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115111143A CN115111143A (en) | 2022-09-27 |
| CN115111143B true CN115111143B (en) | 2023-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210754410.XA Active CN115111143B (en) | 2022-06-28 | 2022-06-28 | Valve-free piezoelectric pump with inner dip arrow-shaped fluid-blocking cambered surface cavity |
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| CN (1) | CN115111143B (en) |
Citations (5)
| 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 |
| CN109798239A (en) * | 2019-04-11 | 2019-05-24 | 长春工业大学 | A kind of Valveless piezoelectric pump of intracavitary a variety of bluff bodys |
| CN112412759A (en) * | 2020-11-18 | 2021-02-26 | 青岛农业大学 | Mixing, stirring and pumping integrated valveless piezoelectric pump |
| CN213063903U (en) * | 2020-07-10 | 2021-04-27 | 桂林理工大学 | Arrow-shaped bluff body valveless piezoelectric pump |
| CN216617831U (en) * | 2021-11-23 | 2022-05-27 | 桂林理工大学 | Semi-cylindrical choking body conical cavity valveless piezoelectric pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008525709A (en) * | 2004-12-23 | 2008-07-17 | サブマシン コーポレイション | Reaction drive energy transmission device |
-
2022
- 2022-06-28 CN CN202210754410.XA patent/CN115111143B/en active Active
Patent Citations (5)
| 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 |
| CN109798239A (en) * | 2019-04-11 | 2019-05-24 | 长春工业大学 | A kind of Valveless piezoelectric pump of intracavitary a variety of bluff bodys |
| CN213063903U (en) * | 2020-07-10 | 2021-04-27 | 桂林理工大学 | Arrow-shaped bluff body valveless piezoelectric pump |
| CN112412759A (en) * | 2020-11-18 | 2021-02-26 | 青岛农业大学 | Mixing, stirring and pumping integrated valveless piezoelectric pump |
| CN216617831U (en) * | 2021-11-23 | 2022-05-27 | 桂林理工大学 | Semi-cylindrical choking body conical cavity valveless piezoelectric pump |
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| Publication number | Publication date |
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| CN115111143A (en) | 2022-09-27 |
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