CN116971970B - Electric drive multi-thread flexible electrofluidic pump based on scaling structure and preparation method thereof - Google Patents
Electric drive multi-thread flexible electrofluidic pump based on scaling structure and preparation method thereof Download PDFInfo
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- CN116971970B CN116971970B CN202311226066.8A CN202311226066A CN116971970B CN 116971970 B CN116971970 B CN 116971970B CN 202311226066 A CN202311226066 A CN 202311226066A CN 116971970 B CN116971970 B CN 116971970B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
- F04B43/086—Machines, pumps, or pumping installations having flexible working members having tubular flexible members with two or more tubular flexible members in parallel
-
- 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
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
- F04B43/09—Pumps having electric drive
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention provides an electric drive multi-thread flexible electrofluidic pump based on a scaling structure and a preparation method thereof, and belongs to the field of flexible electrofluidic pumps. The method solves the problem of complex fluid transportation in the flexible device and system thermal control of the flexible device. The flexible electronic fluid pump comprises a plurality of sections of fluid flow channels which are packaged in a unit packaging layer, wherein the sections of fluid flow channels are packaged through an electronic fluid pump packaging layer and an integrated layer to form a flexible electronic fluid pump, the sections of detachable flexible scaling units are connected to form the fluid flow channels, and a flexible substrate is rolled to form the detachable flexible scaling units. The pump is generally electrically driven, with a plurality of flexible electrodes mounted within the flexible substrate, and an adjustable high voltage power supply controls the voltage of the flexible electrodes and thus the electric field strength of the fluid flow path. The invention is based on the transportation and heat transmission process of complex fluid in the flexible pipe, combines the flexible base pipe structure design formed by the multi-thread scaling unit, and carries out dynamic-thermal energy linkage transportation by taking the application of an active electric field as energy input.
Description
Technical Field
The invention belongs to the field of flexible electrofluidic pumps for improving the flow rate of complex fluid and enhancing heat transfer, and particularly relates to an electrically driven multi-thread flexible electrofluidic pump based on a scaling structure and a preparation method thereof.
Background
In recent years, the development of flexible electronic technology is in an important stage from laboratory to industrial application, which will bring about revolutionary changes to the application industry of flexible devices. Along with the development of the flexible electronic, the flexible electronic has the advantages of large area, special deformation, portability, multifunction integration and the like, and has wide application prospect in the fields of information, energy, national defense, medical treatment and the like. With the development of flexible devices, multi-scenario application of flexible devices is one of the development cores of flexible electronic technology. In this context, the transport process and system thermal management for various complex fluids (e.g., heterogeneous/viscoelastic fluids, etc.) within flexible devices is one of the current development focus.
However, this also presents an urgent need and serious challenge for flexible electronics manufacturing techniques and fluid pumping techniques that adapt to flexible devices. Therefore, the flexible electrofluidic pump preparation method which is efficient, simple, low in cost and suitable for mass production is developed, and on the basis, the complex fluid transportation and thermal management requirements in the multi-scene flexible device are met, so that the flexible electrofluidic pump preparation method becomes one of the core work of flexible pump development.
Disclosure of Invention
In order to solve the problems of complex fluid transportation and system thermal control in a flexible device and further promote advanced application of the flexible electronic device in multiple scenes, the invention provides an electrically driven multi-thread flexible electrofluidic pump based on a scaling structure and a preparation method thereof. Compared with a single fluid driving mode in the traditional mechanical pump, the invention avoids the low integration of the rigid pump and breaks the multiparty limit of application scenes of the rigid pump. The invention provides an efficient complex fluid transportation-thermal management flexible electrofluidic pump based on the transportation and thermal transmission process of complex fluid in a flexible pipe, and combines the flexible substrate pipe structural design formed by a multithreading scaling unit, and the application of an active electric field is used as energy input to carry out dynamic-thermal energy linkage transportation.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides an electric drive multithread flexible electrofluidic pump based on scaling structure, includes a plurality of sections fluid runner, and complicated fluid flows in the fluid runner, the fluid runner encapsulation is in the unit encapsulation layer, and a plurality of sections fluid runner after encapsulation becomes flexible electrofluidic pump through electrofluidic pump encapsulation layer and integrated layer encapsulation, the fluid runner is the flexible scaling unit connection of a plurality of sections detachable and forms, the flexible scaling unit of detachable is rolled up by flexible substrate and forms. The flexible electrofluidic pump is electrically driven, a plurality of flexible electrodes are arranged in the flexible substrate, and the voltage of the flexible electrodes is controlled by the adjustable high-voltage power supply so as to control the electric field intensity of the fluid flow channel.
Further, an abrasion-resistant hydrophobic coating is spin-coated on the inner wall of the flexible substrate.
Furthermore, an embedded groove is formed in the inner wall of the flexible substrate, a plurality of flexible electrodes are fixed in the embedded groove, and a positive electrode pin through hole and a negative electrode pin through hole are formed in the flexible substrate.
Furthermore, the flexible electrode comprises an anode and a cathode, the anode and the cathode are uniformly connected on the pins below the detachable flexible scaling unit, and the anode pins and the cathode pins are respectively obtained by extension.
Further, the fluid flow channel and the anode and cathode pins are encapsulated in a unit encapsulation layer; the positive electrode pin and the negative electrode pin are respectively connected with the positive electrode and the negative electrode of the adjustable high-voltage power supply module.
Further, the detachable flexible scaling unit is divided into a shrinking section and a enlarging section, wherein the inlet diameter of the shrinking section is D1, the outlet diameter of the shrinking section is D2, the inlet diameter of the enlarging section is D2, the outlet diameter of the enlarging section is D1, and D1 is more than D2, the length of the detachable flexible scaling unit is L0, the length ratio of the shrinking section to the enlarging section is L1:L2=n, wherein, the number of times of the shrinking section is not less than n and not less than ¼, and L1+L2=L0, the thickness and diameter ratio D:d=m, wherein, 1.5 is not less than m and not less than 1.2, the electrode groove width ratio of the shrinking section is b1:h1=alpha, wherein, 7 is not less than alpha and not less than 5, the wall thickness ratio of the groove depth of an embedded groove of the shrinking section to the outer wall of the detachable flexible scaling unit is gamma, wherein, 0.3 is not less than gamma and not less than 0.2; the electrode groove width-to-height ratio of the releasing section is beta, wherein beta is more than or equal to 5 and more than or equal to 3, and the ratio of the embedded groove depth of the releasing section to the wall thickness of the outer wall of the detachable flexible scaling unit is the same as that of the shrinking section.
Further, the detachable flexible scaling units are sequentially arranged and combined into a fluid flow channel from left to right in a sequential manner of shrinking and enlarging.
Further, the plurality of detachable flexible zoom units are connected through the clamping groove.
Further, the complex fluid flows along the direction of shrinking and then expanding inside the detachable flexible scaling unit, and the complex fluid in the detachable flexible scaling unit is accelerated under the action of the electric field force, so that the fluid flows to the next detachable flexible scaling unit and is accelerated again.
Further, from the contraction section to the expansion section direction of the detachable flexible scaling unit, the complex fluid passes through the positive flexible electrode and then passes through the negative flexible electrode, and so on.
Further, several sections of fluid flow channels are stacked and packaged into a tube bundle through the electrofluid pump packaging layer and the integration layer, or several sections of fluid flow channels are laid flat and packaged into a film through the electrofluid pump packaging layer and the integration layer.
The preparation method of the electrically driven multi-thread flexible electrofluidic pump based on the scaling structure specifically comprises the following steps:
step 1: carrying out size design, determining the size of a detachable flexible scaling unit according to the size of equipment with heat dissipation requirements, setting the size of a flexible electrode, wherein the width b is consistent with the width of a groove formed in the detachable flexible scaling unit, the thickness is y, and the y is less than or equal to 0.5b; the contraction section and the expansion section of the detachable flexible scaling unit are provided with only one pair of electrode pairs, and the arrangement sequence is from contraction to expansion in a positive-to-negative sequence;
step 2: manufacturing each element, and manufacturing a flexible substrate in a mode of die casting or 3D printing, wherein the flexible substrate is made of a heat-conducting flexible silicon rubber material, and the flexible electrode is made of a metal sheet in a mode of laser cutting or directly processing the shape of the electrode; punching a positive pin through hole and a negative pin through hole in a groove formed in the flexible substrate;
step 3: connecting and packaging the units, wherein the flexible electrode and the detachable flexible scaling unit adopt a fixed mode of slotting embedding or colloid bonding; the detachable flexible scaling unit is formed by curling a flexible substrate and fixing the flexible substrate in a colloid bonding mode; the fluid flow channel is formed by connecting a plurality of detachable flexible scaling units end to end, and the combination mode is realized by adopting a bonding or colloid bonding mode; the pins led out from the flexible electrode are connected with the positive electrode in a colloid bonding mode, and the negative electrode is connected with the negative electrode; the unit packaging layer and the fluid flow channel are fixed in a colloid bonding mode; the combination mode of the unit packaging layer and the flexible electrode is realized by adopting a slotting embedding mode or a colloid bonding mode.
Compared with the prior art, the electric drive multi-thread flexible electrofluidic pump based on the scaling structure and the preparation method thereof have the beneficial effects that:
(1) The present invention functionally enhances the transport capacity of complex fluids, especially heterogeneous fluids containing particulates/viscoelastic liquids, and heat transfer efficiency. In the development and application of the flexible device at present, the pumping of fluid in the device is complex and is limited by the low heat conduction property of the flexible substrate material, and the problems of fluid transportation and thermal management in the flexible device need to be solved. The traditional flexible device has less fluid transportation and does not need an external mechanical pump as energy input, which greatly prevents the flexible device from realizing the requirements of small volume, light weight and high efficiency.
(2) The invention has high structural integration level, adopts a mode of combining active and passive, integrates the flexible electrode and the substrate scaling structure, reduces the space and the quality of the device to a great extent, and realizes the functions of light weight and high efficiency. By adopting an electrofluidic driving mode and combining a scaling/built-in turbulence structure, the fluid turbulence is increased, and on one hand, the self-transportation process of complex fluid (nano fluid, multiphase fluid and the like, especially fluid containing particles which are easy to deposit, viscoelastic fluid and the like) in a flexible device is realized; on the other hand, the heat management problem of the flexible electrofluidic pump system is solved, especially the local high heat flux density/heat transmission is realized, the convection reinforcement is further realized in the process of realizing the self-transportation of the fluid, and the heat transportation rate is improved. So that the energy utilization of the system increases.
(3) According to the invention, the multithread scaling unit is adopted in design, a wear-resistant hydrophobic coating is spin-coated on the contact surface of the fluid and the substrate, based on electrohydrodynamic properties, the efficient transportation of complex fluid (reverse gravity/directional transportation/simultaneous transportation of multiple fluids) is realized by combining the double electrodes, and the scaling unit ensures the flow velocity and improves the transportation efficiency while avoiding the problems of uneven sediment/two-phase mixing of particles in the complex fluid.
(3) The invention has wide application scene, and the detachable flexible zoom unit structure takes the zoom pipe structure as a unit, is integrated into a multithreaded tubular/membranous structure, can be used for a curved surface/plane structure, meets the application requirements of different flexible scenes, and can realize fluid transportation and thermal control in a complex structure.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic view of a fluid flow path according to the present invention;
FIG. 2 is a schematic perspective view of an electrically driven multi-threaded flexible electrofluidic pump based on a scaled structure according to embodiment 1 of the present invention, wherein the dashed box portion is one of the fluidic flow channels;
FIG. 3 is a block diagram of a flexible substrate of a fluid flow channel according to the present invention;
FIG. 4 is a perspective view of a scaling unit of a flexible substrate of a fluid flow channel according to the present invention;
FIG. 5 is a top view of a flexible substrate with a fluid flow channel according to the present invention with its scaling unit configuration deployed;
FIG. 6 is a perspective view of a flexible substrate of a fluid flow channel according to the present invention after deployment of a scaling unit;
FIG. 7 is a schematic structural view of a flexible electrode arrangement of a flexible substrate of a fluid flow channel according to the present invention;
FIG. 8 is a perspective view of a flexible electrode arrangement of a flexible substrate of a fluid flow channel according to the present invention;
FIG. 9 is a side view of a flexible electrode arrangement of a flexible substrate of a fluid flow channel according to the present invention;
FIG. 10 is a schematic view of a tube bundle-like flexible electrofluidic pump according to embodiment 2 of the present invention;
fig. 11 is a schematic structural view of a film-shaped flexible electrofluidic pump according to embodiment 1 of the present invention;
in the figure: 1-a flexible substrate; 2-a flexible electrode; 3-fluid flow path; 4-a detachable flexible zoom unit; 5-a unit encapsulation layer; 6-an electrofluidic pump encapsulation layer; 7-integrating the layer; 8-adjustable high-voltage power supply, 11-positive electrode pin through hole, 12-negative electrode pin through hole, 21-positive electrode, 22-negative electrode, 41-shrinking section and 42-releasing section.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be noted that, in the case of no conflict, embodiments of the present invention and features of the embodiments may be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.
The invention provides an electrically driven multi-thread flexible electrofluidic pump based on a scaling structure and a preparation method thereof, and in order to make the description of the invention more understandable, the invention is further described below with reference to the accompanying drawings and a specific implementation method.
It should be noted that, the dimensions of the embodiments related to the method depend on the actual thermal control object setting, and the embodiments described below only explain the present invention, and are not limiting; references herein to "upper", "lower", "front", "rear", etc. merely represent relative positions of the structures and not absolute positions.
Referring to fig. 1-11 for describing the present embodiment, an electrically driven multi-thread flexible electrofluidic pump based on a scaling structure includes a plurality of sections of fluidic channels 3, complex fluid flows in the fluidic channels 3, the fluidic channels 3 are encapsulated in a unit encapsulation layer 5, the plurality of sections of encapsulated fluidic channels 3 are encapsulated by an electrofluidic pump encapsulation layer 6 and an integration layer 7, the fluidic channels 3 are formed by connecting a plurality of sections of detachable flexible scaling units 4, the detachable flexible scaling units 4 are formed by rolling a flexible substrate 1, a plurality of flexible electrodes 2 are installed in the flexible substrate 1, and an adjustable high-voltage power supply 8 controls the voltage of the flexible electrodes 2, so as to control the electric field intensity of the fluidic channels 3.
The flexible electrodes 2 are respectively arranged in grooves on the inner surface of the flexible substrate 1, a section of positive and negative pins are led out from the positions of a positive pin through hole 11 and a negative pin through hole 12 designed on the flexible substrate 1, and the flexible substrate 1 is rolled up and fixed to obtain the detachable flexible scaling unit 4.
The inner surface of the flexible substrate 1 is spin-coated with a wear-resistant hydrophobic coating, so that the hydrophobic property of the inner surface of the fluid conveying pipe is enhanced. Preferably, a fluorosilane-based hydrophobic coating is selected.
After the flexible substrate 1 is manufactured and rolled and fixed to obtain the detachable flexible scaling unit 4, the detachable flexible scaling unit 4 is divided into a shrinking section 41 and an expanding section 42, the inlet diameter of the shrinking section 41 is large, the outlet diameter is small, and the inlet diameter of the expanding section 42 is small and the outlet diameter is large.
The length of the detachable flexible scaling unit 4 is set to be L0, and the inlet diameter and the outlet diameter of the detachable flexible scaling unit are equal and are set to be D1; in addition, the diameter of the outlet of the shrinking section 41 is equal to that of the inlet of the enlarging section 42, and D1 is larger than D2. The length ratio of the shrinking section 41 to the placing section 42 is L1:L2=n (where n is larger than or equal to ¼), and L1+L2=L0, the thickness outer diameter ratio D:d=m (1.5 is larger than or equal to m is larger than or equal to 1.2), and the electrode groove aspect ratio of the shrinking section 41 is b1:h1=alpha (7 is larger than or equal to alpha is larger than or equal to 5), as shown in fig. 3. The substrate inner sides of the contraction section 41 and the release section 42 are respectively embedded with a pair of the flexible electrodes 2. The complex fluid flows into the contraction section 41 along the fluid flow channel 3, flows out from the release section 42, and sequentially and alternately flows through the flexible pump pipelines formed by the split flexible scaling units 4 in series as shown in fig. 1.
The wall thickness ratio of the groove depth of the flexible electrode 2 to the outer wall of the detachable flexible scaling unit is h1, B=gamma (0.3 is more than or equal to gamma is more than or equal to 0.2); the electrode groove width-to-height ratio of the releasing section 42 is b2:h2=beta (5 is larger than or equal to beta is larger than or equal to 3), the ratio of the groove depth of the flexible electrode 2 to the wall thickness of the outer wall of the detachable flexible scaling unit 4 is the same as that of the shrinking section 41, and meanwhile, the grooves for fixing the flexible electrode 2 in the flexible substrate 1 are punched with the positive electrode pin through hole 11 and the negative electrode pin through hole 12 to lead out pins of the positive electrode 21 and the negative electrode 22 of the flexible electrode 2, as shown in fig. 3. Preferably, a flexible polymer such as hard silica gel is selected to make the flexible substrate 1.
The positive electrode groove and the negative electrode groove of the shrinking section 41 and the releasing section 42 are determined according to other sizes, the position of the groove of the flexible electrode 2 is determined according to the whole size, and the sizes of the positive electrode pin through hole 11 and the negative electrode pin through hole 12 are determined according to the size of the flexible electrode 2. The detachable flexible scaling unit 4 is made of flexible materials such as PDMS, polyurethane, polyester, polyethylene and the like, and optionally, insulating high-heat-conductivity nano particles can be mixed in the substrate to improve the heat conductivity of the flexible substrate.
The detachable flexible scaling units 4 (the number is a plurality of) are connected by designed clamping grooves to form a fluid flow channel 3, pins of the flexible electrode 2 are uniformly arranged towards one direction, positive electrodes are uniformly connected with positive electrode 21 pins of the flexible electrode 2, negative electrodes are uniformly connected with negative electrode 22 pins of the flexible electrode 2, positive and negative electrode total pins are respectively led out, the device is completely packaged in the unit packaging layer 5, the positive and negative electrode total pins are connected with the adjustable high-voltage power supply 8, and the adjustable high-voltage power supply 8 is controlled by a knob switch. The extended positive and negative poles are respectively connected with the positive and negative poles of the adjustable high-voltage power supply 8, as shown in fig. 1. The flexible electrode 2 generates high-strength direct current by supplying power through an adjustable high-voltage power supply 8; an adjustable high voltage power supply 8 is controlled to control the magnitude of the electric field in the circulation duct and thereby the flow rate of the complex fluid flowing in the fluid flow channel 3.
The flexible substrate 1 is bent along the center line of the broadside, and the detachable flexible scaling unit 4 can be obtained by connecting the ends, as shown in fig. 2. The plurality of detachable flexible zoom units 4 are sequentially connected in order of first shrinking from left to right and then expanding, so that the fluid flow channel 3 can be obtained, preferably, the fluid flow channel 3 can be connected in a groove fit mode, as shown in fig. 2, and the required length is designed for convenience according to practical situations.
The complex fluid flows along the direction of shrinking and then expanding inside the detachable flexible scaling unit 4, the complex fluid can be oil containing impurities, electronic fluorinated liquid and the like, and the complex fluid inside the detachable flexible scaling unit 4 is accelerated under the action of an electric field force, so that the fluid flows to the next detachable flexible scaling unit 4 and is accelerated again.
In the detachable flexible scaling unit 4 and the unit packaging layer 5, the flexible electrode 2 is made of metal with good thermal conductivity, such as copper, silver and the like. From the contraction section 41 to the release section 42 of the detachable flexible zoom unit 4, the complex fluid passes through the positive electrode 21 and then the negative electrode 22, and so on.
The unit encapsulation layer 5 is outside the fluid flow channel 3 to fix and protect the fluid flow channel 3 and the flexible electrode 2. The unit package layer 5 is made of flexible material, such as polyethylene or other composite materials.
The size of the device and the number of flexible electrofluidic pump units are adjusted according to the complex fluid transport flow and thermal load and are fully encapsulated in the unit encapsulation layer 5. An adjustable high-voltage power supply 8 is arranged, and the electric field strength between the positive electrode and the negative electrode of the flexible electrode 2 is changed, so that the electric field force for driving the complex fluid is changed.
When there is a thermal control requirement external to the flexible electrofluidic pump, the integrated flexible tube/membrane may optionally be disposed within a system requiring thermal control. The complex fluid fills the fluid flow channel 3; heat is transferred through the cell encapsulation layer 5 and the flexible substrate 1 and absorbed by the complex fluid; the adjustable high-voltage power supply 8 is started, and a high-strength direct-current electric field is generated in the fluid flow channel 3 through the flexible electrode 2 controlled by the adjustable high-voltage power supply 8, so that complex fluid forms macroscopic flow oriented along the fluid flow channel 3 under the action of the electric field force; the complex fluid with the absorbed heat energy flows into the next section of fluid flow channel 3, the heat is dissipated through the unit packaging layer 5, the complex fluid newly flowing into the section continuously absorbs the heat transferred by the external heat source, continuously flows under the action of the high-strength direct current electric field at the next moment, takes away the absorbed heat, and then completes energy release through the next section of unit packaging layer 5.
Example 1:
as shown in fig. 11, the fluid flow channels of several sections are laid flat and packaged in a film shape by the electrofluidic pump packaging layer 6 and the integration layer 7. A flexible membrane integrated by a single layer of a plurality of fluid flow channels 3, the convergent-divergent tubes are laid in parallel two by two and fixed by an integrated layer 7, and the flexible membrane structure example of external encapsulation is carried out by an electrofluidic pump encapsulation layer 6.
Example 2:
as shown in fig. 10, a plurality of sections of fluid flow channels are stacked, packaged into a tube bundle through an electrofluidic pump packaging layer 6 and an integration layer 7, two layers of fluid flow channels 3 are radially added with one fluid flow channel 3 as a center, and are fixed through the integration layer 7, and the outermost layer is packaged through the electrofluidic pump packaging layer 6, so that an integrated flexible tube structure example is formed.
The preparation method of the electrically driven multi-thread flexible electrofluidic pump based on the scaling structure specifically comprises the following steps:
1. the device is dimensioned:
(1) According to the size of equipment with heat dissipation requirements, the size of the detachable flexible scaling unit 4 is determined, and the length ratio L1 of the shrinking section 41 and the releasing section 42 of the detachable flexible scaling unit 4 is L2 = n, and the thickness and the outer diameter ratio are as follows: d=m, electrode groove aspect ratio b1 of the reduced section 41, h1=α, and the ratio of the groove depth of the flexible electrode 2 to the wall thickness of the outer wall of the detachable flexible scaling unit 4 is: h1, b=γ; the electrode groove width-to-height ratio b2 of the discharge section 42, h2=β, and the ratio of the groove depth of the flexible electrode 2 to the wall thickness of the outer wall of the detachable flexible scaling unit 4 is the same as that of the reduction section 41.
(2) Setting the size of the flexible electrode 2, wherein the width b is consistent with the slotting width of the detachable flexible scaling unit 4, the thickness is y, and the y is less than or equal to 0.5b; the positive electrode groove and the negative electrode groove of the contraction section 41 and the release section 42 are determined according to other sizes; each pair of positive and negative electrodes forms an electrode pair; from the data set, there is therefore only one pair of electrodes in both the contraction section 41 and the release section 42 of the detachable flexible zoom unit 4, and the arrangement order is from contraction to release to positive and negative.
2. Making the components of the device:
(1) Manufacturing a flexible substrate 1 by means of die casting or 3D printing, which is understood to mean that the detachable flexible scaling unit 4 is cut out and unfolded from a wall; the flexible substrate 1 is made of high-performance heat-conducting flexible silicon rubber material, so that the required flexibility and heat conductivity and good insulativity are ensured.
(2) The flexible electrode 2 can be manufactured by adopting a manufacturing mode of laser cutting or directly processing a metal sheet in an electrode shape; further, when the flexible electrode 2 is manufactured by directly processing a metal sheet, silver/copper materials can be selected, so that good conductivity and flexibility can be ensured at the same time; and a positive electrode pin through hole 11 and a negative electrode pin through hole 12 are punched at one position in a groove formed in the flexible substrate 1, and the thickness of the positive electrode pin through hole is equal to that of the flexible electrode 2 and is used for leading out a flexible electrode pin.
3. The connection and encapsulation of the units of the device:
the manner of connection and packaging of the embodiments is also important for safe and efficient operation of the electrofluidic pump. The combination mode of the unfolded detachable flexible scaling unit 4 and the flexible electrode 2 is realized by adopting a slotting embedding mode, a colloid bonding mode (such as neoprene bonding metal and a silica gel substrate) mode and the like; the detachable flexible scaling unit 4 is obtained by curling the flexible substrate 1 and fixing the flexible substrate by using a colloid bonding mode; the fluid flow channel 3 is formed by connecting a plurality of detachable flexible scaling units 4 end to end, and the combination mode is realized by adopting a bonding or colloid bonding mode; the pins led out from the flexible electrode 2 are connected with the positive electrode in a colloid bonding mode, and the negative electrode is connected with the negative electrode; the unit packaging layer 5 and the fluid flow channel 3 are fixed in a colloid bonding mode; the combination of the unit packaging layer 5 and the flexible electrode 2 is realized by grooving and embedding (processing a through groove with the same width and thickness as the flexible electrode 2 at the corresponding position on the unit packaging layer 5), colloid bonding (such as neoprene adhesive for bonding metal and a silica gel substrate), and the like.
The invention relates to an electric drive multithreading flexible electric fluid pump based on a scaling structure, which has the following working principle and flow description:
based on the electrohydrodynamic principle, by adjusting a high-voltage power supply, the arrangement of the positive electrode and the negative electrode enables a strong electric field to exist between the positive electrode and the negative electrode, so that coulomb force exerted on the fluid is influenced, and the concentration of free ions in the fluid to be conveyed is changed along with the change of the intensity of the electric field, so that the traction force of the free ions on the liquid is changed. From the structural analysis of the scaling unit, the scaling structure can improve the maximum flow velocity of the conveying fluid, can reduce the phenomenon of impurity deposition of the conveying fluid and reduce the possibility of pipeline blockage; and the flexible electrode arranged on the inner wall of the scaling tube not only enhances disturbance, but also realizes unidirectional high-speed transportation of the conveying fluid. The device delivers fluid (always negative to positive in case of an electronegative liquid), i.e. always from one fluid channel of a scaling unit to the next. According to the invention, through the integrated design of multiple threads, the high-speed transportation of complex fluid is realized, so that the heat transportation capacity of the system is improved, and different heat control requirements are met.
The embodiments of the invention disclosed above are intended only to help illustrate the invention. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention.
Claims (8)
1. A preparation method of an electrically driven multi-thread flexible electrofluidic pump based on a scaling structure is characterized by comprising the following steps: the electric drive multi-thread flexible electrofluidic pump based on the scaling structure comprises a plurality of sections of fluid flow channels (3), complex fluid flows in the fluid flow channels (3), the fluid flow channels (3) are packaged in a unit packaging layer (5), the plurality of sections of packaged fluid flow channels (3) are packaged into the flexible electrofluidic pump through an electrofluidic pump packaging layer (6) and an integrated layer (7), the fluid flow channels (3) are formed by connecting a plurality of sections of detachable flexible scaling units (4), the detachable flexible scaling units (4) are formed by rolling up a flexible substrate (1), the electrofluidic pump is electrically driven, a plurality of flexible electrodes (2) are arranged in the flexible substrate (1), and an adjustable high-voltage power supply (8) is used for controlling the voltage between the positive electrode and the negative electrode of the flexible electrodes so as to control the magnitude of electric field force applied to the complex fluid;
the inner wall of the flexible substrate (1) is coated with a wear-resistant hydrophobic coating in a spin mode, an embedded groove is formed in the wall surface, a plurality of flexible electrodes (2) are fixed in the embedded groove, and an anode pin through hole (11) and a cathode pin through hole (12) are formed in the flexible substrate (1);
the detachable flexible zoom unit (4) is divided into a zoom-in section (41) and a zoom-out section (42), wherein the entrance diameter of the zoom-in section (41) is D1, the exit diameter is D2, the entrance diameter of the zoom-out section (42) is D2, the exit diameter is D1, and D1 is more than D2;
the preparation method of the electrically driven multi-thread flexible electrofluidic pump based on the scaling structure specifically comprises the following steps:
step 1: carrying out size design, determining the size of a detachable flexible scaling unit (4) according to the size of equipment with heat dissipation requirements, setting the size of a flexible electrode (2), wherein the width b is consistent with the width of a groove formed in the detachable flexible scaling unit (4), the thickness is y, and the y is less than or equal to 0.5b; only one pair of electrode pairs is arranged in the contraction section (41) and the release section (42) of the detachable flexible zoom unit (4), and the arrangement sequence is from the contraction section (41) and the release section (42) to the positive sequence and the negative sequence;
step 2: manufacturing each element, and manufacturing a flexible substrate (1) by adopting a die casting or 3D printing mode, wherein the flexible substrate (1) is made of a heat-conducting flexible silicon rubber material, and the flexible electrode (2) is made of a metal sheet in a laser cutting or direct processing electrode shape; punching a positive pin through hole (11) and a negative pin through hole (12) in a groove formed in the flexible substrate (1);
step 3: connecting and packaging the units, wherein the flexible electrode (2) and the detachable flexible scaling unit (4) are fixed in a slotting embedding or colloid bonding mode; the detachable flexible scaling unit (4) is curled by the flexible substrate (1) and fixed in a colloid bonding mode; the fluid flow channel (3) is connected end to end by a plurality of detachable flexible scaling units (4), and the combination mode adopts bonding or colloid bonding; the pins led out of the flexible electrode (2) are bonded by colloid, the positive electrode is connected with the positive electrode, and the negative electrode is connected with the negative electrode; the unit packaging layer (5) is adhered with the fluid flow channel (3) by colloid; the unit packaging layer (5) and the flexible electrode (2) are fixed in a slotting embedding or colloid bonding mode.
2. The method for preparing the electrically driven multi-thread flexible electrofluidic pump based on the scaling structure according to claim 1, characterized in that: the flexible electrode (2) comprises an anode (21) and a cathode (22), the anode (21) and the cathode (22) are uniformly connected through pins below the detachable flexible scaling unit (4) of the flexible electrode (2), and the anode pins and the cathode pins are respectively obtained through extension.
3. The method for preparing the electrically driven multi-thread flexible electrofluidic pump based on the scaling structure according to claim 2, characterized in that: the fluid flow channel (3), the positive electrode pin and the negative electrode pin are packaged in a unit packaging layer (5); the positive electrode pin and the negative electrode pin are respectively connected with the positive electrode and the negative electrode of the adjustable high-voltage power supply (8).
4. The method for preparing the electrically driven multi-thread flexible electrofluidic pump based on the scaling structure according to claim 1, characterized in that: the length of the detachable flexible scaling unit (4) is set to be L0, the length ratio of the shrinking section (41) to the releasing section (42) is L1:L2=n, wherein, the number of the parts of the container is not less than n is not less than ¼, and the ratio D of the thickness to the outer diameter is D:d=m, wherein, the number of the parts of the container is not less than 1.5 and not less than 1.2, the aspect ratio of the electrode groove of the shrinking section (41) is b1:h1=alpha, wherein, the number of the parts of the container is not less than 7 and not less than 5, the wall thickness ratio of the groove depth of the embedded groove of the shrinking section (41) to the outer wall of the detachable flexible scaling unit (4) is gamma, and the gamma is not less than 0.3 and not less than 0.2; the electrode groove aspect ratio of the amplifier section (42) is beta, wherein beta is more than or equal to 5 and more than or equal to 3, and the ratio of the embedded groove depth of the amplifier section (42) to the outer wall thickness of the detachable flexible scaling unit (4) is the same as that of the shrinking section (41).
5. The method for preparing the electrically driven multi-thread flexible electrofluidic pump based on the scaling structure according to claim 1, characterized in that: the detachable flexible scaling units (4) are sequentially arranged from left to right in a sequential manner from first shrinking to last shrinking and are combined into the fluid flow channel (3).
6. The method for preparing the electrically driven multi-thread flexible electrofluidic pump based on the scaling structure according to claim 1, characterized in that: from the contraction section (41) to the release section (42) of the detachable flexible zoom unit (4), complex fluid passes through the positive electrode (21) and then passes through the negative electrode (22), and the like.
7. The method for preparing the scaling structure-based electrically driven multi-thread flexible electrofluidic pump according to claim 5, wherein the method comprises the following steps: the complex fluid flows along the direction of shrinking and then expanding inside the detachable flexible scaling unit (4), and the complex fluid in the detachable flexible scaling unit (4) is accelerated under the action of an electric field force, so that the fluid flows to the next detachable flexible scaling unit (4) and is accelerated again.
8. A method of manufacturing a scaled structure based electrically driven multi-threaded flexible electrofluidic pump as claimed in any one of claims 1 to 7, wherein: the sections of fluid flow channels (3) are stacked and packaged into a tube bundle through the electrofluid pump packaging layer (6) and the integration layer (7), or the sections of fluid flow channels (3) are horizontally arranged and packaged into a film through the electrofluid pump packaging layer (6) and the integration layer (7).
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