CN206495777U - A kind of reciprocating Micropump of valveless type - Google Patents
A kind of reciprocating Micropump of valveless type Download PDFInfo
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- CN206495777U CN206495777U CN201621401611.8U CN201621401611U CN206495777U CN 206495777 U CN206495777 U CN 206495777U CN 201621401611 U CN201621401611 U CN 201621401611U CN 206495777 U CN206495777 U CN 206495777U
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- main pipeline
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- micropump
- flexible rod
- sin
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Abstract
The utility model discloses a kind of reciprocating Micropump of valveless type, including inlet tube, upper main pipeline, lower main pipeline, vertical curve flexible rod and horizontal line flexible rod, wherein, upper main pipeline and lower main pipeline are linked together composition and need to pump " S " type main pipeline of fluid；The inlet pipes are passed through the fluid that speed is periodic sinusoidal function, deformed upon by fluid driven linear elasticity rod, recycle the deformation of linear elasticity rod that fluids within pipes are formed with certain inhibition, so that the net pump discharge of direction from left to right is continuously increased；Completing the utility model has simple in construction, and without applied voltage, stability is good, and cost is low, the convenient advantage largely produced, can complete efficient fluid pumping.
Description
Technical field
The utility model belongs to micro-fluidic field, is a kind of reciprocating Micropump of valveless type, is that one kind is used to pump microfluid
Passive type conveying device.
Background technology
Micro-fluidic chip becomes a popular research field in recent years, and the operation by chip as microfluidic analysis is put down
Platform, while using PDMS process technologies to rely on, the control to fluid is completed using the microchannel network designed as architectural feature
And analysis, it is the emphasis of existing field development.
Micro-fluidic chip have small volume, streaming flow it is controllable, consumption reagent it is few, analysis efficiency is high, into production cost it is low
Feature, and bioengineering, chemical analysis, energy source and power, Aero-Space and medical domain are widely used in, with larger hair
Exhibition prospect.
In fields such as medical science, biologies, Micropump may be used as the conveying of medicine, the reaction of chemical reagent, DNA and protein
Analysis etc., achieves many achievements in research, generally speaking Micropump can be divided into two classes：There are valve-type, valveless type.Have in valve-type Micropump
There are piezoelectric driven, electrostatic drive type, thermal drivers type；There are shrinkage expansion type, electrohydraulic dynamic type, thermal drivers in valveless type Micropump
Type, Double diaphragm pump etc..
Compared with having valve-type Micropump, no-valve type Micropump have it is simple in construction, without the physical friction between device, to the defeated of high frequency
Enter the features such as response characteristic is good.The research to valveless type Micropump was concentrated mainly on the feature of contraction-expansion tubing type Micropump in the past
In analysis, the coupling of fluid itself and different channel designs is not taken into account well, meanwhile, in biomedicine
Etc. practical field, the efficiency of Micropump is often unsatisfactory, and fan-out capability is extremely difficult to desirable level, therefore the delivery efficiency of Micropump
Condition of work with actual Micropump is still key issue urgently to be resolved hurrily.
Utility model content
The utility model belongs to micro-fluidic field, it is therefore intended that provide a kind of reciprocating Micropump of valveless type for efficient
Pump fluid.
A kind of reciprocating Micropump of valveless type, including inlet tube, upper main pipeline, lower main pipeline, vertical curve flexible rod and level
Linear elasticity rod, wherein, upper main pipeline and lower main pipeline are linked together composition and need to pump " S " type main pipeline of fluid, simultaneously
The inner tube radius r2 of main pipeline is 200um, and the outer tubing radius r1 of main pipeline is 300um；The company of horizontal line flexible rod and duct wall
Contact and the line in the lower pipeline center of circle are 45 degree in angle β with vertical direction, similarly, vertical curve flexible rod also with vertical side
To the position that angle β is 45 degree, the length of both threads flexible rod is 70um；The border entries speed of described inlet tube be U=
0.2 × sin (2 × pi × t) m/s, similarly, can pump demand to adjust entrance velocity according to different fluid velocities.
The utility model uses commercialization finite element software COMSOL Multiphysics as simulation softwares, and this is soft
Part is based on FInite Element, by solving partial differential equation（Single game）Or partial differential equations（Many）To realize true thing
The emulation of phenomenon is managed, the physical phenomenon of real world is mathematically solved.
The technical solution adopted in the utility model is：The cyclical fluidic related to SIN function is passed through in inlet pipes,
Fluid is entered in " S " type main pipeline by inlet tube, due to flow direction cyclically-varying, linear elasticity rod is produced bending, right
The fluid of input produces certain inhibition, so that the net pump discharge having influence in main pipeline.
The utility model has the advantage of：There is provided a kind of valveless type reciprocating Micropump, overcome compared to there is valve-type Micropump
Fatigue and frictional dissipation that mechanical movement is brought, while overcoming the blockage problem near valve, greatly improve Micropump
Stability and reliability；Compared to other valveless type Micropumps, the utility model does not need applied voltage driving, without considering the cycle
Property input fluid backflow, while small volume, cost is low, the flow control of pumping is stable, can work at high frequencies, resists dry
Disturb ability strong, frequency response is good, noiseless, be easy to a large amount of productions.The utility model can preferably with biological, chemistry, medical science
Deng field linking, energy production application is in chemical reagent analysis, micro-fluidic chip, medical transfusion system etc..
Brief description of the drawings
Fig. 1 is a kind of reciprocating Micropump plan view of valveless type described in the utility model；
Fig. 2 is the fluid under time T=0.24 second in import pipe fluid input speed U=0.2 × sin (2 × pi × t)
Motion state analogous diagram in Micropump；
Fig. 3 is the fluid under time T=0.78 second in import pipe fluid input speed U=0.2 × sin (2 × pi × t)
Motion state analogous diagram in Micropump；
Fig. 4 is that, in import pipe fluid input speed U=0.2 × sin (pi × t), fluid is micro- under time T=0.5 second
Motion state analogous diagram in pump；
Fig. 5 is that, in import pipe fluid input speed U=0.2 × sin (pi × t), fluid is micro- under time T=1.5 second
Motion state analogous diagram in pump；
Fig. 6 be in import pipe fluid input speed U=2 × 0.2 × sin (2 × pi × t), the time T=0.24 second flow down
Motion state analogous diagram of the body in Micropump；
Fig. 7 be in import pipe fluid input speed U=2 × 0.2 × sin (2 × pi × t), the time T=0.78 second flow down
Motion state analogous diagram of the body in Micropump；
Fig. 8 is when import pipe fluid input speed is respectively U=0.2 × sin (2 × pi × t) and U=2 × 0.2 × sin (2
× pi × t) when, the net pump discharge comparison diagram of direction from left to right；
Fig. 9 be when import pipe fluid input speed be respectively U=0.2 × sin (2 × pi × t) and U=0.2 × sin (pi ×
When t), the net pump discharge comparison diagram of direction from left to right；
Embodiment
A kind of reciprocating Micropump of valveless type, uses PDMS for material, and SU8 moulds are made by processing steps such as photoetching, developments
Tool；Then the PDMS material mixed with curing agent is applied on mould, is stripped after being heating and curing and PDMS formers are made；Again
The PDMS material mixed with curing agent is applied on PC pieces, curing and demolding is reheated and PDMS flat boards is made；Assemble on request
Reach the standard grade flexible rod, then it is the micro-pump structure that PDMS formers are bonded into gained micro-structural with flat board.
The Micropump includes inlet tube, upper main pipeline, lower main pipeline, vertical curve flexible rod and horizontal line flexible rod, wherein, on
Main pipeline and lower main pipeline, which are linked together composition, to be needed to pump " S " type main pipeline of fluid, while the inner tube radius of main pipeline
R2 is 200um, and the outer tubing radius r1 of main pipeline is 300um；The tie point and the lower pipeline center of circle of horizontal line flexible rod and duct wall
Line and vertical direction in angle β be 45 degree, similarly, vertical curve flexible rod is also being 45 degree with vertical direction angle β
Position, the length of both threads flexible rod is 70um；The fluid input speed of inlet tube is periodic SIN function, inlet porting
Speed is 0.2 × sin (pi × t) m/s, similarly, can need to adjust entrance velocity according to different.
By inputting the flow periodically on SIN function in porch, the linear elasticity rod in main channel is driven to produce curved
It is curved to become, and then different degrees of inhibition is produced to the fluid in main pipeline, the flow of lower channel is changed, reach
To the ever-increasing pumping target of net pump discharge.
Carry out emulating structural simulation using commercial finite element software COMSOL Multiphysics, change inlet flow rate
Condition（Amplitude and frequency）To its parameter scanning, simulation result is as shown in Fig. 2 to Fig. 8, and it is positive direction to take direction from left to right.
Fig. 2 is the fluid under time T=0.24 second in import pipe fluid input speed U=0.2 × sin (2 × pi × t)
Motion state analogous diagram in Micropump, such as schemes, when time T=0.24 second, entrance velocity basically reaches positive maximum, now
By fluid resistance the Bending Deformation away from duct wall direction, throwing of the vertical curve flexible rod in radial direction are occurred for vertical curve flexible rod
The increase of shadow length, meanwhile, linear elasticity rod can hinder fluid to continue up the stream of main pipeline to recover the form of vertical direction
It is dynamic；Horizontal line flexible rod in lower main pipeline is due to the impetus by fluid, and the duct wall towards bottom occurs relative
Less Bending Deformation so that the fluid in main pipeline can be pumped away successfully from lower main pipeline；Exactly because vertical curve bullet
Property rod and horizontal line flexible rod deformed towards different directions, so as to produce guide effect to the fluid of input, make most of fluid
Lower main pipeline is flowed out, only minority of fluid flows out from upper main pipeline.
Fig. 3 is the fluid under time T=0.78 second in import pipe fluid input speed U=0.2 × sin (2 × pi × t)
Motion state analogous diagram in Micropump, such as schemes, when time T=0.78 second, entrance velocity basically reaches reverse maximum, now
By fluid resistance the Bending Deformation away from duct wall direction, horizontal line flexible rod are occurred for the horizontal line flexible rod of lower main pipeline
In the projected length increase of radial direction, meanwhile, linear elasticity rod can hinder stream to a certain extent to recover the form of vertical direction
Body flows back to inlet tube；Vertical curve flexible rod in upper main pipeline is due to the impetus by fluid, pipe of the meeting along top
Relatively small Bending Deformation occurs for road wall so that the fluid stream in main pipeline is returned in inlet tube；Similarly, exactly because vertically
Linear elasticity rod and horizontal line flexible rod are deformed towards different directions, so as to produce guide effect to the fluid of input, make major part
Fluid is from upper main pipeline has flowed back to inlet tube, and only minority of fluid flows back to inlet tube from lower main pipeline.
Fig. 4 is in import pipe fluid input speed U=0.2 × sin (pi × t), that is, to control the amplitude of entrance velocity constant,
When frequency is reduced to original half, motion state analogous diagram of the fluid in Micropump under time T=0.5 second, as shown in the figure；
After entry condition is changed, compared with Fig. 2, the maximum of flow does not change, but changes in flow rate to it is positive most
The time that big value is spent was become for 0.5 second by original 0.24 second.
Fig. 5 is in import pipe fluid input speed U=0.2 × sin (pi × t), that is, to control the amplitude of entrance velocity constant,
When frequency is reduced to original half, motion state analogous diagram of the fluid in Micropump under time T=1.5 second, as shown in the figure；
After entry condition is changed, compared with Fig. 3, the maximum of flow does not change, but changes in flow rate to it is positive most
The time that big value is spent was become for 1.5 seconds by original 0.78 second.
Fig. 6 is the frequency that entrance velocity is controlled in import pipe fluid input speed U=2 × 0.2 × sin (2 × pi × t)
It is constant, when velocity amplitude increases to original twice, motion state analogous diagram of the fluid in Micropump under time T=0.24 second,
As shown in the figure；After entry condition is changed, compared with Fig. 2, cycle and U=0.2 × sin (2 × pi × t) phase of pump discharge
Together, while the maximum of fluid velocity is changed into 0.4m/s from original 0.2m/s in main pipeline, fluid is most of from inlet tube stream
In downward main pipeline.
Fig. 7 is the frequency that entrance velocity is controlled in import pipe fluid input speed U=2 × 0.2 × sin (2 × pi × t)
It is constant, when velocity amplitude increases to original twice, motion state analogous diagram of the fluid in Micropump under time T=0.78 second,
As shown in the figure；After entry condition is changed, compared with Fig. 3, cycle and U=0.2 × sin (2 × pi × t) phase of pump discharge
Together, similarly, the maximum of fluid velocity is changed into 0.4m/s from original 0.2m/s in main pipeline, and fluid is most of from upper supervisor
Road is flowed in inlet tube.
It is the preceding half period of positive direction, i.e. inlet tube entrance velocity in SIN function to take flow direction from left to right
Interior, fluid is most of from inlet tube flows into lower main pipeline, and few part is flowed in upper main pipeline, by lower main pipeline exit
The flow that flow subtracts main pipeline exit is the net flow pumped from left to right.
Fig. 8 be import pipe fluid input speed be respectively U=2 × 0.2 × sin (2 × pi × t) and U=0.2 × sin (2 ×
Pi × t) under the conditions of pump net flow comparison diagram, wherein, under U=0.2 × sin (2 × pi × t) pump net flow with 0.5 second
Cycle stepped curvilinear motion, it can be seen that the growth of total pump discharge over time under this entrance velocity constantly increases
Plus；Compared to the former, within the identical time, entrance velocity is total pump flow under the conditions of U=2 × 0.2 × sin (2 × pi × t)
Amount is more intimate one times than the net pump discharge under the conditions of U=0.2 × sin (2 × pi × t)；, can i.e. when increasing entrance velocity
Effectively to increase net pump discharge.
Fig. 9 is that import pipe fluid input speed is respectively U=0.2 × sin (2 × pi × t) and U=0.2 × sin (pi × t)
Under the conditions of pump net flow comparison diagram, similarly, under U=0.2 × sin (2 × pi × t) pump net flow with the cycle of 0.5 second
Stepped curvilinear motion, it can be seen that the growth of total pump discharge over time under this entrance velocity is continuously increased；Phase
Net flow is pumped than the former, under U=0.2 × sin (pi × t) with the stepped curvilinear motion of the cycle of 1 second；In identical
Between under T=2 second, entrance velocity is respectively the net pump discharge under U=0.2 × sin (2 × pi × t) and U=0.2 × sin (pi × t)
Identical, its medium velocity is changed over time more slowly, while fluctuating range is relative for U=0.2 × sin (pi × t) flow curve
It is smaller.
To sum up, different degrees of adjustment is carried out by the amplitude to inlet flow rate and frequency, can effectively controls the Micropump
Net pump discharge, reach the pumping requirements of " no-voltage, low-loss, high efficiency ".
Claims (2)
1. a kind of reciprocating Micropump of valveless type, it is characterised in that：Including inlet tube（2）, upper main pipeline（1）, lower main pipeline（4）、
Vertical curve flexible rod（5）With horizontal line flexible rod（3）, wherein, upper main pipeline（1）With lower main pipeline（4）It is linked together composition
" S " type main pipeline of pumping fluid is needed, while the inner tube radius of main pipeline（r2）For 200um, the outer tubing radius of main pipeline
（r1）For 300um；Horizontal line flexible rod（3）It is in angle with the tie point of duct wall and the line in the lower pipeline center of circle and vertical direction
（β）For 45 degree, likewise, vertical curve flexible rod（5）Also with vertical direction angle（β）For 45 degree of position, both threads elasticity
The length of rod is 70um；Inlet tube（2）Fluid input speed be periodic SIN function.
2. the reciprocating Micropump of a kind of valveless type according to claim 1, it is characterised in that：Described inlet tube（2）Side
Boundary's entrance velocity is U=0.2 × sin (2 × pi × t) m/s, similarly, can pump demand to adjust according to different fluid velocities
Entrance velocity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621401611.8U CN206495777U (en) | 2016-12-20 | 2016-12-20 | A kind of reciprocating Micropump of valveless type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201621401611.8U CN206495777U (en) | 2016-12-20 | 2016-12-20 | A kind of reciprocating Micropump of valveless type |
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| CN206495777U true CN206495777U (en) | 2017-09-15 |
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| CN201621401611.8U Withdrawn - After Issue CN206495777U (en) | 2016-12-20 | 2016-12-20 | A kind of reciprocating Micropump of valveless type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438339A (en) * | 2016-12-20 | 2017-02-22 | 海南大学 | No-valve reciprocating micro pump |
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2016
- 2016-12-20 CN CN201621401611.8U patent/CN206495777U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438339A (en) * | 2016-12-20 | 2017-02-22 | 海南大学 | No-valve reciprocating micro pump |
| CN106438339B (en) * | 2016-12-20 | 2018-09-11 | 海南大学 | A kind of reciprocating Micropump of valveless type |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170915 Effective date of abandoning: 20180911 |
|
| AV01 | Patent right actively abandoned |