CN109973368A - A kind of piezo-stack type air pump - Google Patents
A kind of piezo-stack type air pump Download PDFInfo
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- CN109973368A CN109973368A CN201910187745.6A CN201910187745A CN109973368A CN 109973368 A CN109973368 A CN 109973368A CN 201910187745 A CN201910187745 A CN 201910187745A CN 109973368 A CN109973368 A CN 109973368A
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- body cavity
- group
- pump chamber
- hole
- diaphragm
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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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
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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
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
-
- 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
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
- F04B45/047—Pumps having electric 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention belongs to Micro Fluid Transfer fields, and in particular to a kind of piezo-stack type air pump.The pump housing is equipped with access hole, at least two air storage chambers and the body cavity group being made of body cavity, successively reduces from body cavity number contained by hole to the body cavity group portalled is entered；Close to entering to be respectively equipped with disengaging oral cavity on hole and the body cavity that portals in body cavity group, the outlet plenum that access hole distinguishes body cavity group adjacent thereto is connected to snout cavity；The disengaging oral cavity of adjacent body cavity group is connected；It passes in and out oral cavity and filled valve block constitutes terminal valve in it；Diaphragm is pressed on the pump housing by gland, and the body cavity balanced configuration of the pilot hole and the pump housing of gland constitutes pump chamber in diaphragm two sides, diaphragm and body cavity, and the pump chamber in same body cavity group is simultaneously unified into pump chamber group；Piston is crimped on diaphragm by the piezoelectric stack with driving and sensing unit in pilot hole；Piezoelectric stack in each pump chamber group is connected through different conducting wire groups with driving power；Driving power exports d. c. voltage signal and is commutated according to the situation of change of sensing unit induced voltage.
Description
Technical field
The invention belongs to minimum gas transmission and control fields, and in particular to a kind of piezo-stack type air pump.
Background technique
Minitype gas compression is also referred to as mini air compressor, air pump, gas compressing apparatus etc. with conveying device, is mainly used for gas
Sampler body, gas recycle and all various aspects such as supply, jet cooling, negative pressure holding, plenum, oxygenation.According to working principle,
Common gas compressing apparatus can be divided into diaphragm type, electromagnetic type, vane type, piston type etc., and common feature is all to pass comprising mechanical
Dynamic part, therefore structure is complicated, volume, weight and power consumption are all larger, and there are biggish noise and electromagnetic interference, are not easy to structure
Microminiaturization with it is integrated, microcomputer electrical domain application receive certain restriction.In recent years, people propose a variety of in succession
The piezoelectric type minitype gas of type compresses and conveying device, as Chinese patent 201410104036.4,201410577904.0,
201510649212.7,201710697409.7 etc..Although above-mentioned gas compression and conveying device structural principle and performance difference
It is larger, but be all that gas-powered is realized in the bending deformation generated under electric field action using chip type piezoelectric vibrator, because of piezoelectricity
Pump chamber variable quantity caused by oscillator bending deformation is relatively small, the existing achievable output of piezoelectric type gas compressing apparatus
Flow and pressure are also very low, cannot especially obtain biggish output flow and higher output pressure simultaneously, promote and apply by
Certain restriction is arrived.
Summary of the invention
To improve supply gas pressure, the present invention proposes a kind of piezo-stack type air pump, and embodiment of the present invention is: by pumping
Body, gland, piezoelectric stack, piston, valve block, diaphragm and sealing ring are constituted；The pump housing is equipped with access hole, at least two by body cavity structure
At body cavity group and the air storage chamber equal with body cavity group quantity, enter hole and each body cavity group and portal to be sequentially connected in series, from hole is entered to going out
Body cavity quantity contained by each body cavity group in hole is successively reduced；Snout cavity is equipped with close to the body cavity for entering hole side in each body cavity group, is leaned on
The body cavity of nearly side of portalling is equipped with the outlet plenum being connected to air storage chamber, enters the snout cavity connection of hole body cavity group adjacent thereto, out
The outlet plenum of hole body cavity group adjacent thereto is connected to；Each body cavity in same body cavity group is connected to through inner via hole, two adjacent body cavity groups
Disengaging oral cavity be connected to through accessibke porosity；Disengaging oral cavity and the valve block installed in it respectively constitute terminal valve, and valve block is cantilever
Beam or disc structure；Gland is mounted on the pump housing through screw and diaphragm is crimped on the pump housing, the diameter of the pilot hole of gland with
The diameter of the body cavity of the pump housing is equal, and in diaphragm two sides, sealing ring is crimped in body cavity by diaphragm for pilot hole and body cavity balanced configuration
Form pump chamber；Pump chamber in same body cavity group is simultaneously unified into pump chamber group, each pump chamber group series connection；Piezoelectric stack and work are housed in pilot hole
Plug, piston is crimped on diaphragm by gland through piezoelectric stack, and piston is T-type and its small end and membrane contacts, big end side wall and lead
It is contacted to hole inner wall；Piezoelectric stack includes driving unit and sensing unit；To obtain maximum compression ratio, diaphragm 0.1,0.2 and
The small end radius of optimal piston and the radius ratio of body cavity are respectively 0.79,0.65 and 0.55 when the beryllium-bronze of 0.3mm thickness, pump chamber
Height be the elongation that is acted on by voltage of driving unit；Compression ratio refers to the appearance of pump chamber caused by piezoelectric stack dilatation
Product the ratio between variable quantity and the quiet volume of pump chamber；The driving unit and sensing unit of piezoelectric stack in different pump chamber groups are through different
Conducting wire group is connected with driving power, i.e., the driving unit and sensing unit in each pump chamber group all use two groups of independent conducting wire groups with
Driving power is connected；In work, the deformation direction of same pump chamber group septation is identical, i.e., piezoelectric stack drives in same pump chamber group
Unit is driven voltage effect and elongates or shortens.
In the present invention, it is d. c. voltage signal or different frequency that driving power, which is exported to driving unit in each pump chamber group,
Ac voltage signal changes driving voltage according to the situation of change of sensing unit induced voltage when driving power exports direct current signal
To, realize self-excited driving, i.e., when sensing unit induced voltage reach extreme value when DC voltage become between 0 and maximum positive voltage
It changes, driving unit alternately dilatation, to solve the tracking problem of piezoelectric stack resonance frequency when different loads.
In the present invention, the maximum output pressure of air pump is Pmax=P0ηp{(1+α)/(1-α)[β+(1+α)/(1-α)]n-1-
1 }, in which: P0For standard atmospheric pressure, ηpFor efficiency factor, α > 0 is compression ratio, and β > 1 is contained pump chamber in each adjacent pump chamber group
The minimum value of quantity ratio, n >=2 are the quantity of pump chamber group.
For having the air pump there are three pump chamber group, from hole is entered to portalling, body cavity group is successively defined as body cavity group one, two and
Three, inlet valve is successively defined as inlet valve one, two and three, and pump chamber group is successively defined as pump chamber group one, two and three, and outlet valve is successively
It is defined as outlet valve one, two and three；Air storage chamber is successively defined as air storage chamber one, two and three；In work, pump chamber group once enter hole from
External world's sucking gas is discharged into air storage chamber one after carrying out first order compression, and pump chamber group two sucks gas from air storage chamber one and carries out the second level
Air storage chamber two is discharged into after compression, pump chamber group three sucks after gas carries out third level compression from air storage chamber two and is discharged into air storage chamber three, stores up
Gas in gas chamber three is portalled discharge.
Feature and advantage: the method that accumulation compression is realized using the pump chamber group series connection with different pump chambers, when sound state all
It can get higher supply gas pressure；Confession needed for being easy to obtain by the method for increasing the quantity of pump chamber in pump chamber group and pump chamber group
Atmospheric pressure.
Detailed description of the invention
Fig. 1 is the structural profile illustration of air pump in a preferred embodiment of the present invention；
Fig. 2 is the A-A cross-sectional view of Fig. 1；
Fig. 3 is the structural schematic diagram of a preferred embodiment of the present invention middle pump body；
Fig. 4 is the top view of Fig. 5；
Fig. 5 is the structural schematic diagram of piezoelectric stack in a preferred embodiment of the present invention；
Fig. 6 is the relational graph of a preferred embodiment of the present invention middle valve plate deformation and piezoelectric stack dilatation.
Specific embodiment
A kind of piezo-stack type air pump of the invention by pump housing a, gland b, piezoelectric stack d, piston e, valve block g, diaphragm f and
Sealing ring h is constituted.Pump housing a be equipped with into hole a1, the a2 that portals, at least two body cavity group Ai being made of body cavity a3 and with body cavity group
The equal air storage chamber qi of quantity enters hole a1 and is sequentially connected in series with each body cavity group Ai and the a2 that portals, from each body for entering hole a1 to the a2 that portals
The quantity of body cavity a3 contained by chamber group Ai successively reduces；Snout cavity is equipped with close to the body cavity a3 for entering the hole side a1 in each body cavity group Ai
A4, the body cavity a3 close to the side a2 of portalling are equipped with the outlet plenum a5 being connected to air storage chamber qi, enter hole a1 body cavity group adjacent thereto
The snout cavity a4 of Ai is connected to, the outlet plenum a5 connection of the body cavity group Ai a2 that portals adjacent thereto；Each body in same body cavity group Ai
Chamber a3 is connected to through inner via hole a6, and the snout cavity a4 and outlet plenum a5 of two adjacent body cavity group Ai is connected to through accessibke porosity a7；Snout cavity a4
Inlet valve vi and outlet valve Vi are respectively constituted with the valve block g installed in outlet plenum a5 and its, valve block g is cantilever beam or dish knot
Structure；Gland b is mounted on pump housing a through screw and diaphragm f is crimped on pump housing a, the diameter and the pump housing of the pilot hole b1 of gland b
The diameter of the body cavity a3 of a is equal, and pilot hole b1 and body cavity a3 balanced configuration are in the two sides up and down of diaphragm f, and diaphragm f is by sealing ring h
It is crimped in body cavity a3 and forms pump chamber c；Pump chamber c in same body cavity group Ai is simultaneously unified into pump chamber group ci, each pump chamber group ci series connection；
Piezoelectric stack d and piston e is housed, piston e is crimped on diaphragm f by gland b through piezoelectric stack d, and piston e is T in pilot hole b1
Type and its small end are contacted with diaphragm f, big end side wall is contacted with the inner wall of pilot hole b1；Piezoelectric stack d include driving unit d1 and
Sensing unit d2；To obtain maximum compression ratio, optimal piston e's is small when diaphragm f is the beryllium-bronze of 0.1,0.2 and 0.3mm thickness
The radius ratio for holding radius and body cavity a3 is respectively 0.79,0.65 and 0.55, and the height of pump chamber c is that driving unit d1 is acted on by voltage
Elongation；Compression ratio refers to the volume variable quantity of pump chamber c caused by piezoelectric stack d dilatation and the quiet volume of pump chamber c
The ratio between；Piezoelectric stack d in different pump chamber group ci is connected through different conducting wire groups with driving power, i.e., the drive in each pump chamber group ci
Moving cell d1 and sensing unit d2 uses two groups of independent conducting wire groups to be connected with driving power；In work, same pump chamber group ci
The deformation direction of septation f is identical, the driving unit d1 of piezoelectric stack d is driven voltage effect and stretches in i.e. same pump chamber group ci
Long or shortening.
In the present invention, it is d. c. voltage signal or different frequencies that driving power, which is exported to driving unit d1 in each pump chamber group ci,
The ac voltage signal of rate, driving power make to drive when exporting direct current signal according to the situation of change of sensing unit d2 induced voltage
Voltage commutation realizes self-excited driving, i.e., when the induced voltage of sensing unit d2 reaches extreme value DC voltage in 0 and maximum positive electricity
Transformation, driving unit d1 alternately dilatation between pressure, to solve the tracking of piezoelectric stack d resonance frequency when different loads
Problem.
In the present invention, the maximum output pressure of air pump is Pmax=P0ηp{(1+α)/(1-α)[β+(1+α)/(1-α)]n-1-
1 }, in which: P0For standard atmospheric pressure, ηpFor efficiency factor, α > 0 is compression ratio, and β > 1 is contained pump in each adjacent pump chamber group ci
The minimum value of chamber c quantity ratio, n >=2 are the quantity of pump chamber group ci.
In the present invention, body cavity group Ai, inlet valve vi, pump chamber group ci, the i in outlet valve Vi are represented from entering hole a1 to the a2 that portals
Serial number, i=1,2,3 ...；For having the air pump there are three pump chamber group ci, from entering hole a1 to the a2 that portals, body cavity group Ai according to
Secondary to be defined as one A1 of body cavity group, two A2 and three A3, inlet valve vi is successively defined as one v1 of inlet valve, two v2 and three v3, pump chamber group
Ci is successively defined as one c1 of pump chamber group, two c2 and three c3, and outlet valve Vi is successively defined as one V1 of outlet valve, two V2 and three V3；Storage
Gas chamber qi is successively defined as one q1 of air storage chamber, two q2 and three q3；In work, one c1 of pump chamber group is entered hole a1 and sucks gas from the external world
It is discharged into one q1 of air storage chamber after carrying out first order compression, two c2 of pump chamber group is after one q1 of air storage chamber sucking gas progress second level compression
It is discharged into two q2 of air storage chamber, three c3 of pump chamber group is discharged into three q3 of air storage chamber after carrying out third level compression from two q2 of air storage chamber sucking gas,
Gas in three q3 of air storage chamber portalled a2 discharge.
Claims (1)
1. a kind of piezo-stack type air pump, is made of the pump housing, gland, piezoelectric stack, piston, valve block, diaphragm and sealing ring, special
Sign is: the pump housing is equipped with access hole, at least two body cavity groups being made of body cavity and the air storage chamber equal with body cavity group quantity,
Enter hole and each body cavity group and portal to be sequentially connected in series, successively be reduced from body cavity quantity contained by hole to each body cavity group portalled is entered；Each body
Close to the body cavity for entering hole side is equipped with snout cavity, the body cavity close to side of portalling goes out equipped with what is be connected to air storage chamber in chamber group
Oral cavity enters the snout cavity connection of hole body cavity group adjacent thereto, the outlet plenum connection for the body cavity group for portalling adjacent thereto；Same body cavity
Each body cavity in group is connected to through inner via hole, and the disengaging oral cavity of two adjacent body cavity groups is connected to through accessibke porosity；Pass in and out oral cavity and its interior institute
The valve block of installation respectively constitutes terminal valve；Gland is crimped on the pump housing on the pump housing and by diaphragm, the pilot hole of gland
Diameter is equal with the diameter of the body cavity of the pump housing, and in diaphragm two sides, sealing ring is crimped on by diaphragm for pilot hole and body cavity balanced configuration
Pump chamber is formed in body cavity；Pump chamber in same body cavity group is simultaneously unified into pump chamber group, each pump chamber group series connection；Piezo stack is housed in pilot hole
Piston is crimped on diaphragm by heap and piston, gland through piezoelectric stack, and piston is T-type and its small end and membrane contacts, big end side
Wall is contacted with pilot hole inner wall；Piezoelectric stack includes driving unit and sensing unit, the drive of the piezoelectric stack in different pump chamber groups
Moving cell and sensing unit are connected through different conducting wire groups with driving power；The driving unit of piezoelectric stack is believed by DC voltage to be made
Driving voltage is set to commutate with and according to the situation of change of sensing unit induced voltage, the deformation direction phase of same pump chamber group septation
Together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910187745.6A CN109973368B (en) | 2019-03-01 | 2019-03-01 | Piezoelectric stack type air pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910187745.6A CN109973368B (en) | 2019-03-01 | 2019-03-01 | Piezoelectric stack type air pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109973368A true CN109973368A (en) | 2019-07-05 |
| CN109973368B CN109973368B (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910187745.6A Active CN109973368B (en) | 2019-03-01 | 2019-03-01 | Piezoelectric stack type air pump |
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| CN (1) | CN109973368B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623740A (en) * | 2004-12-13 | 2005-06-08 | 华中科技大学 | Mini clamp with dual-chip |
| CN201705743U (en) * | 2010-04-30 | 2011-01-12 | 浙江师范大学 | Long-stroke precise stepping driver |
| CN102192135A (en) * | 2011-06-24 | 2011-09-21 | 浙江师范大学 | Piezoelectric stack pump provided with sensor |
| CN202597033U (en) * | 2012-05-23 | 2012-12-12 | 浙江师范大学 | Series-parallel connection combination driving piezoelectric pump |
| CN205349673U (en) * | 2016-01-19 | 2016-06-29 | 吉林大学 | Piezoelectric stack mixing pump |
| CN108035869A (en) * | 2018-01-10 | 2018-05-15 | 浙江师范大学 | A kind of adaptive miniature piezoelectric pump installation capable of reversing of non-resonant |
-
2019
- 2019-03-01 CN CN201910187745.6A patent/CN109973368B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623740A (en) * | 2004-12-13 | 2005-06-08 | 华中科技大学 | Mini clamp with dual-chip |
| CN201705743U (en) * | 2010-04-30 | 2011-01-12 | 浙江师范大学 | Long-stroke precise stepping driver |
| CN102192135A (en) * | 2011-06-24 | 2011-09-21 | 浙江师范大学 | Piezoelectric stack pump provided with sensor |
| CN202597033U (en) * | 2012-05-23 | 2012-12-12 | 浙江师范大学 | Series-parallel connection combination driving piezoelectric pump |
| CN205349673U (en) * | 2016-01-19 | 2016-06-29 | 吉林大学 | Piezoelectric stack mixing pump |
| CN108035869A (en) * | 2018-01-10 | 2018-05-15 | 浙江师范大学 | A kind of adaptive miniature piezoelectric pump installation capable of reversing of non-resonant |
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| Publication number | Publication date |
|---|---|
| CN109973368B (en) | 2020-08-21 |
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Effective date of registration: 20230710 Address after: 230000 Room 203, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Hefei Jiuzhou Longteng scientific and technological achievement transformation Co.,Ltd. Address before: 321004 Zhejiang Normal University, 688 Yingbin Avenue, Wucheng District, Jinhua City, Zhejiang Province Patentee before: ZHEJIANG NORMAL University |
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