Ferrofluid pump experimental device with repeatability, variable structural parameters and visualization

Abstract

The invention discloses a ferromagnetic fluid pump experiment device with repeatability, variable structural parameters and visualization. The ferromagnetic fluid pump experiment device comprises a pump cavity composition mechanism, a pump cavity supporting mechanism, a fixed magnet and a rotary magnet. The pump cavity composition mechanism comprises a pump cavity upper cover plate, a pump cavity upper cover plate sealing gasket, a pump cavity special-shaped structure, a pump cavity lower cover plate sealing gasket and a pump cavity lower cover plate; a pump cavity internal circular structure is arranged in the pump cavity, and an annular micro-channel is formed between the pump cavity internal circular structure and the pump cavity special-shaped structure; a pump cavity internal circular structure upper sealing gasket and a pump cavity internal circular structure lower sealing gasket are respectively arranged above and below the pump cavity internal circular structure; a fixed ferromagnetic fluid and a piston ferromagnetic fluid are arranged in the annular micro-channel; a fixed magnet is arranged on the upper side of the pump cavity upper cover plate; a rotating magnet is arranged on the lower side of the pump cavity lower cover plate. According to the invention, one set of device can be used for testing various different working conditions, so that system errors caused by replacement of experimental equipment are avoided, and meanwhile, material waste caused by redundant processing is also avoided.

Description

Technical Field

[0001] The invention relates to the technical field of ferrofluid driven pumps, and in particular to a ferrofluid pump experimental device with repeatability, variable structural parameters and visualization. Background Art

[0002] With the rapid development of life sciences, biomedicine, aerospace and other disciplines, their connection with microfluidic systems is becoming increasingly close. For example, microfluid chemical analysis systems, artificial blood pumps for the treatment of myocardial infarction, microdrug injection systems and microfuel supply for spacecraft all require microfluidic technology to develop towards high precision, high pumping stability and high integration.

[0003] Micropumps are the actuators of microfluidic systems, and they are responsible for the precise transmission and rapid control of microfluids. They are known as the "heart" of microfluidic systems. At present, the transmission modes of micropumps mainly include mechanical modes such as piezoelectric, electrostatic, electromagnetic, and pneumatic, and non-mechanical modes such as electroosmotic, thermal bubble, and magnetic fluid. Among these mechanical and non-mechanical micropump drive modes, magnetic fluid drive has the advantages of simple structure, high pumping reliability, and high integration, and has gradually become the mainstream direction of micropump development.

[0004] Since CW Miller proposed the concept of magnetic fluid drive in 1973, researchers from various countries have basically mastered the principle of magnetic fluid drive after nearly 50 years of efforts. Relying on modern processing technology, they have designed and developed various types of magnetic fluid drive pumps. Based on experiments, they have further studied the flow mechanism and drive mechanism of ferrofluid pumps, aiming to establish a complete theoretical system of ferrofluid drive dynamics. However, in the current experimental device, there are the following problems: (1) Most ferrofluid micropump experimental devices are bonded, which makes it impossible to change parameters and reuse them. Multi-condition experiments can only be carried out with multiple sets of experimental devices, resulting in a waste of resources. In addition, due to the tiny scale, it is difficult to maintain consistent precision during multiple processing processes.

[0005] (2) In the visualization experiment of ferrofluid micropump, the fusion and separation process of ferrofluid has not been able to be distinguished with obvious visual effects, and its flow trajectory is even more difficult to capture. Revealing the flow phenomenon and mechanism of the fusion and separation process is a technical challenge in the visualization experimental device.

[0006] (3) The trajectory of the rotating magnet of the ferrofluid micropump can only be changed by replacing the drive shaft. Different specifications of rotating magnets require drive shafts of different sizes. In the experiment, the drive shaft needs to be replaced to achieve changes in the magnetic field intensity and spatial distribution, which makes the experimental process complicated.

[0007] (4) After a ferrofluid pump has been operating for a long time, the wall surface will be stained by the magnetic fluid, making it difficult to observe the internal structure, determine whether the magnetic fluid remains intact, and predict whether the magnetic fluid needs to be replenished.

[0008] The current ferrofluid micropump experimental device cannot meet the requirements of multiple operating parameters and obvious flow visualization, which increases the loss of experimental research funds, wastes sample materials, and hinders the further disclosure of the driving mechanism of ferrofluid micropumps. Therefore, it is necessary to design a ferrofluid pump experimental device with repeatability, variable structural parameters and visualization. Summary of the invention

[0009] The purpose of the present invention is to provide a ferrofluid pump experimental device with repeatability, variable structural parameters and visualization.

[0010] In order to solve the above technical problems, the present invention adopts the following technical solutions: A ferrofluid pump experimental device with repeatability, variable structural parameters and visualization includes a pump chamber component mechanism, a pump chamber support mechanism, a fixed magnet and a rotating magnet, wherein: The pump chamber component structure includes a pump chamber upper cover plate, a pump chamber upper cover plate sealing gasket, a pump chamber special-shaped structure, a pump chamber lower cover plate sealing gasket and a pump chamber lower cover plate, which are stacked in sequence from top to bottom and detachably fixed together; the pump chamber special-shaped structure has a hollow pump chamber that penetrates from top to bottom, and a pump inlet flow channel and a pump outlet flow channel that are connected to the pump chamber; The pump chamber upper cover plate sealing gasket and the pump chamber lower cover plate sealing gasket have the same shape as the pump chamber special-shaped structure, and are used to achieve sealing between the pump chamber upper cover plate and the pump chamber special-shaped structure, and between the pump chamber lower cover plate and the pump chamber special-shaped structure; The upper and lower ends of the pump chamber are closed by the pump chamber upper cover plate and the pump chamber lower cover plate, and a flow channel inlet hole corresponding to and connected with the pump inlet flow channel and a flow channel outlet hole corresponding to and connected with the pump outlet flow channel are provided on the pump chamber upper cover plate; An internal circular structure of the pump chamber is provided in the pump chamber, and a circular microchannel is formed between the internal circular structure of the pump chamber and the special-shaped structure of the pump chamber; an upper sealing gasket of the internal circular structure of the pump chamber and a lower sealing gasket of the internal circular structure of the pump chamber, which are consistent with the internal circular structure of the pump chamber, are provided above and below the internal circular structure of the pump chamber, respectively, so as to realize the sealing between the internal circular structure of the pump chamber and the upper cover plate of the pump chamber, and between the internal circular structure of the pump chamber and the lower cover plate of the pump chamber; The upper sealing gasket of the pump chamber internal circular structure, the pump chamber internal circular structure and the lower sealing gasket of the pump chamber internal circular structure are detachably fixed between the pump chamber upper cover plate and the pump chamber lower cover plate; A pump chamber supporting mechanism is arranged around the pump chamber component mechanism to support the pump chamber component mechanism; A fixed ferromagnetic fluid and a piston ferromagnetic fluid are arranged in the annular microchannel; a fixed magnet is arranged on the upper side of the upper cover plate of the pump chamber at a position corresponding to the fixed ferromagnetic fluid; a rotating magnet is arranged on the lower side of the lower cover plate of the pump chamber, and the rotating magnet has a rotating track cooperating with the annular microchannel under the action of the rotating unit, and is used to drive the ferromagnetic fluid piston to move in the annular microchannel.

[0011] Preferably, the pump chamber special-shaped structure is provided with a plurality of third fixing holes arranged circumferentially on the outer side of the pump chamber, and the pump chamber upper cover plate, the pump chamber upper cover plate sealing gasket, the pump chamber lower cover plate sealing gasket and the pump chamber lower cover plate are respectively provided with a first fixing hole, a second fixing hole, a fourth fixing hole and a fifth fixing hole at corresponding positions, and the corresponding first fixing hole, second fixing hole, third fixing hole, fourth fixing hole and fifth fixing hole are passed through screws and fixed by nuts.

[0012] Preferably, a third connecting hole is provided on the internal circular structure of the pump chamber, and a first connecting hole, a second connecting hole, a fourth connecting hole and a fifth connecting hole are respectively provided at corresponding positions of the upper cover plate of the pump chamber, the upper sealing gasket of the internal circular structure of the pump chamber, the lower sealing gasket of the internal circular structure of the pump chamber and the lower cover plate of the pump chamber, and the corresponding first connecting hole, second connecting hole, third connecting hole, fourth connecting hole and fifth connecting hole are passed through screws and fixed by nuts.

[0013] Preferably, the pump chamber support mechanism is distributed at the four corners of the pump chamber component mechanism, and the pump chamber support mechanism includes an upper clamping plate and a lower clamping plate distributed on the upper and lower sides of the pump chamber component mechanism, and the upper clamping plate and the lower clamping plate are respectively provided with a first locking hole and a second locking hole, and the corresponding first locking hole and the second locking hole are fixed to the pump chamber component mechanism by screws passing through the upper and lower parts and matching nuts; It also includes a bracket, and the upper and lower clamping plates are provided with first and second supporting holes at corresponding positions. The upper end of the bracket is provided with an external thread and is threadedly connected with the corresponding first and second supporting holes.

[0014] Preferably, the upper clamping plate and the lower clamping plate are respectively provided with corner slots; the corners of the pump chamber component mechanism are located at the corner slots of the upper clamping plate and the lower clamping plate, and the upper clamping plate and the lower clamping plate are distributed with a first mounting hole and a seventh mounting hole at the corner slots; the pump chamber upper cover plate, the pump chamber upper cover plate sealing gasket, the pump chamber special-shaped structure, the pump chamber lower cover plate sealing gasket and the pump chamber lower cover plate are respectively provided with a second mounting hole, a third mounting hole, a fourth mounting hole, a fifth mounting hole and a sixth mounting hole at corresponding positions of the four corners; Screws are passed through the corresponding first mounting hole, second mounting hole, third mounting hole, fourth mounting hole, fifth mounting hole, sixth mounting hole and seventh mounting hole and are fixed by nuts.

[0015] Preferably, the pump chamber upper cover plate, the pump chamber special-shaped structure, the pump chamber internal circular structure and the pump chamber lower cover plate are made of transparent plates.

[0016] Preferably, the rotating unit comprises a rotating disk, which is transmission-connected to the motor; a plurality of rotating tracks are arranged on the rotating disk, and different rotating tracks have different rotating radii; A plurality of positioning holes are arranged on each rotating track, and the positioning holes are used to place rotating magnets; the diameters of the positioning holes on the same rotating track are the same; the diameters of the positioning holes on different rotating tracks are the same or different.

[0017] Preferably, the gap between the rotating magnet and the lower cover plate of the pump chamber is less than 1 mm.

[0018] Preferably, the fixed ferromagnetic fluid and the piston ferromagnetic fluid have different colors.

[0019] Preferably, it also includes a detection mechanism, which includes an ammeter. A groove is provided on the upper cover plate of the pump chamber corresponding to the position of the fixed magnet and an upper conductive iron sheet is placed therein, and the upper conductive iron sheet is connected to an upper wire. A groove is provided on the lower cover plate of the pump chamber corresponding to the position of the fixed magnet and a lower conductive iron sheet is placed therein, and the lower conductive iron sheet is connected to a lower wire. The upper wire and the lower wire are connected to the ammeter.

[0020] The beneficial effects of the present invention are: 1. The pump chamber structure of the present invention is constructed by molding, and a detachable combined sealing method is used instead of traditional thermal bonding to achieve the effects of detachability, easy modification and reusability. A set of devices can be used to test a variety of different working conditions, which can ensure that the geometric structures of different experimental conditions are completely consistent, avoid systematic errors caused by replacing experimental equipment, and avoid material waste caused by unnecessary processing.

[0021] When the structural dimensions need to be changed under different experimental working conditions, the width dimension of the pump chamber flow channel can be changed by simply replacing the internal circular structure of the pump chamber with different diameters. When the internal circular structure of the pump chamber and the special-shaped structure of the pump chamber are replaced at the same time, the height dimension of the pump chamber flow channel can be changed. In addition, the main structure does not need to be processed again, and only needs to be disassembled and replaced with a new structure, thereby avoiding experimental system errors and processing waste.

[0022] 2. The present invention can achieve the measurement of various complex working conditions with the same system by replacing the internal circular structure of the pump chamber and the rotating magnet, thereby reducing the waste caused by excessive processing.

[0023] 3. The present invention uses magnetic fluids with different dyes in fixed ferromagnetic fluids and rotating ferromagnetic fluids, and distinguishes the movement forms of the magnetic fluids during the fusion and separation process of the two ferromagnetic fluids by color.

[0024] 4. Compared with the general structure, the experimental device of the present invention adds a conductive structure on the wall of the pump chamber. By using the principle of electromagnetic induction, the volume and movement state of the internal magnetic fluid can be monitored. In experimental research, it can provide scientific researchers with the physical parameters inside the micropump. In actual products, the life of the micropump can be predicted and the maintenance time can be determined to prevent pumping instability caused by lack of magnetic fluid and avoid a series of unpredictable problems caused by pumping instability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the upper cover plate of the pump chamber in the present invention; Figure 2 It is a schematic diagram of the sealing gasket of the upper cover plate of the pump chamber in the present invention; Figure 3 It is a schematic diagram of the special-shaped structure of the pump cavity in the present invention; Figure 4 It is a schematic diagram of the sealing gasket of the lower cover plate of the pump chamber in the present invention; Figure 5 It is a schematic diagram of the lower cover plate of the pump chamber in the present invention; Figure 6 It is a schematic diagram of a sealing gasket on a circular structure inside a pump chamber in the present invention; Figure 7 is a schematic diagram of the internal circular structure of the pump chamber in the present invention; Figure 8 It is a schematic diagram of the sealing gasket under the circular structure inside the pump chamber of the present invention; Fig. 9 It is a schematic diagram of the upper splint and the lower splint in the present invention; Fig.10 It is a diagram of the assembly process of the pump chamber component mechanism and the pump chamber support mechanism of the present invention; Fig.11 It is a schematic diagram of the assembly of the pump chamber component mechanism and the pump chamber support mechanism of the present invention; Fig.12 It is a schematic diagram of the rotating unit in the present invention; Fig.13 It is a plan view of the rotating disk in the present invention; Fig.14 It is a schematic diagram of the present invention.

[0026] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] like Figures 1 to 14 As shown, this embodiment discloses a ferrofluid pump experimental device with repeatability, variable structural parameters and visualization, including a pump chamber component mechanism, a pump chamber support mechanism, a fixed magnet, a rotating magnet and a detection mechanism.

[0029] The specific composition and connection relationship of the above-mentioned institutions are as follows.

[0030] The pump chamber component structure includes a pump chamber upper cover plate 101, a pump chamber upper cover plate sealing gasket 102, a pump chamber special-shaped structure 103, a pump chamber lower cover plate sealing gasket 104 and a pump chamber lower cover plate 105, which are stacked and detachably fixed together from top to bottom. The pump chamber special-shaped structure 103 has a hollow pump chamber that runs through from top to bottom, as well as a pump inlet flow channel and a pump outlet flow channel that are connected to the pump chamber.

[0031] The pump chamber upper cover plate sealing gasket 102 and the pump chamber lower cover plate sealing gasket 104 are made of rubber material and have the same shape as the pump chamber special-shaped structure 103 , and are used to achieve sealing between the pump chamber upper cover plate 101 and the pump chamber special-shaped structure 103 , and between the pump chamber lower cover plate 105 and the pump chamber special-shaped structure 103 .

[0032] The pump chamber upper cover plate 101 and the pump chamber lower cover plate 105 close the upper and lower ends of the pump chamber, and the pump chamber upper cover plate 101 is provided with a flow channel inlet hole 109 corresponding to and connected to the pump inlet flow channel, and a flow channel outlet hole 110 corresponding to and connected to the pump outlet flow channel.

[0033] The pump chamber is provided with a pump chamber internal circular structure 107, and a circular microchannel is formed between the pump chamber internal circular structure 107 and the pump chamber special-shaped structure 103, and the pump inlet flow channel and the pump outlet flow channel are connected to the circular microchannel. The pump chamber internal circular structure 107 is provided with a pump chamber internal circular structure upper sealing gasket 106 and a pump chamber internal circular structure lower sealing gasket 108 of the same shape as the pump chamber internal circular structure 107, respectively, to achieve sealing between the pump chamber internal circular structure 107 and the pump chamber upper cover plate 101, and between the pump chamber internal circular structure 103 and the pump chamber lower cover plate 105.

[0034] The upper sealing gasket 106 of the inner circular structure of the pump chamber, the inner circular structure 107 of the pump chamber and the lower sealing gasket 108 of the inner circular structure of the pump chamber are detachably fixed between the upper cover plate 107 of the pump chamber and the lower cover plate 108 of the pump chamber.

[0035] After assembly, the pump chamber components are fixed by multiple sets of screws and nuts passing through the upper and lower directions, thereby achieving clamping and sealing. Specifically: A plurality of third fixing holes 117 are arranged circumferentially on the outer side of the pump chamber on the pump chamber special-shaped structure 103, and a first fixing hole 113, a second fixing hole 115, a fourth fixing hole 119 and a fifth fixing hole 121 are respectively provided at corresponding positions of the pump chamber upper cover plate 101, the pump chamber upper cover plate sealing gasket 102, the pump chamber lower cover plate sealing gasket 104 and the pump chamber lower cover plate 105, and the corresponding first fixing holes 113, the second fixing holes 115, the third fixing holes 117, the fourth fixing holes 119 and the fifth fixing holes 121 are passed through screws and fixed by nuts.

[0036] A third connecting hole 124 is provided at the center of the internal circular structure 103 of the pump chamber, and a first connecting hole 123, a fourth connecting hole 125 and a fifth connecting hole are respectively provided at corresponding positions of the upper cover plate 101 of the pump chamber, the upper sealing gasket 106 of the internal circular structure of the pump chamber, the lower sealing gasket 108 of the internal circular structure of the pump chamber and the lower cover plate 105 of the pump chamber, and the corresponding first connecting hole 123, third connecting hole 124, fourth connecting hole 125 and fifth connecting hole are passed through screws and fixed by nuts.

[0037] Pump chamber supporting mechanisms are arranged at the four corners of the pump chamber component mechanism to achieve support and secondary fixation of the pump chamber component mechanism. The sealing effect of the pump chamber component mechanism can be enhanced through the secondary fixation to achieve secondary sealing.

[0038] The pump chamber supporting mechanism comprises an upper clamping plate 201 and a lower clamping plate 205 which are distributed on the upper and lower sides of the pump chamber component mechanism. The upper clamping plate 201 and the lower clamping plate 205 are respectively provided with a first locking hole 203 and a second locking hole 207. The corresponding first locking hole 203 and the second locking hole 207 are fixed by screws 301 passing through the upper and lower parts and matching nuts 303, so that the upper clamping plate 201 and the lower clamping plate 205 are clamped and fixed on the pump chamber component mechanism to realize secondary fixation.

[0039] The first support hole 204 and the second support hole 208 are distributed at corresponding positions of the upper clamping plate 201 and the lower clamping plate 205. The first support hole 204 and the second support hole 208 are provided with internal threads. The upper end of the bracket 304 is set as an external thread and is threadedly connected with the corresponding first support hole 204 and the second support hole 208.

[0040] The upper clamping plate 201 and the lower clamping plate 205 are respectively provided with corner slots; the corners of the pump chamber component mechanism are located at the corner slots of the upper clamping plate 201 and the lower clamping plate 205, and the upper clamping plate 201 and the lower clamping plate 205 are distributed with the first mounting hole 202 and the seventh mounting hole 206 at the corner slots; the pump chamber upper cover plate 101, the pump chamber upper cover plate sealing gasket 102, the pump chamber special-shaped structure 103, the pump chamber lower cover plate sealing gasket 104 and the pump chamber lower cover plate 105 are respectively provided with the second mounting hole 111, the third mounting hole 114, the fourth mounting hole 116, the fifth mounting hole 118 and the sixth mounting hole 120 at the corresponding positions of the four corners.

[0041] Screws are passed through the corresponding first mounting hole 202 , second mounting hole 111 , third mounting hole 114 , fourth mounting hole 116 , fifth mounting hole 118 , sixth mounting hole 120 , and seventh mounting hole 206 and fixed by nuts.

[0042] The annular microchannel is provided with a fixed ferromagnetic fluid 204 and a piston ferromagnetic fluid 203. The fixed ferromagnetic fluid 204 is a ferromagnetic fluid used to hinder the flow of the fluid and is a colored ferromagnetic fluid. The piston ferromagnetic fluid 203 is a ferromagnetic fluid used for driving and is a black ferromagnetic fluid.

[0043] A fixed magnet 502 is provided on the upper side of the pump chamber upper cover plate 101 at a position corresponding to the fixed ferromagnetic fluid 204. The fixed magnet 502 is glued to the corresponding position of the pump chamber upper cover plate 101.

[0044] A rotating magnet 501 is provided on the lower side of the pump chamber lower cover plate 105. The rotating magnet 501 has a rotating track that matches the annular microchannel under the action of the rotating unit, and is used to drive the ferrofluid piston 203 to move in the annular microchannel. The gap between the rotating magnet 501 and the pump chamber lower cover plate 101 is less than 1 mm.

[0045] In this embodiment, the rotating unit includes a rotating disk 402, which is connected to the motor 401. The motor 401 is the motive force in the system, which is used to drive the rotating disk 402 to move, thereby driving the rotating magnet 501 to move. The center of the rotating disk 402 is provided with a center hole with a diameter of Q1, and is installed on the motor shaft through the center hole. The center hole can also adopt a D-type interface.

[0046] The rotating disk 402 is designed with 9 positioning holes for placing the rotating magnet 501. The positioning holes have three different diameters, D1, D2, and D3, and each of the same diameters is provided with three positioning holes, which are arranged on different rotation radius tracks of R1, R2, and R3 respectively.

[0047] In this embodiment, the detection mechanism includes an ammeter 507, an upper conductive iron sheet 112, and a lower conductive iron sheet 122. A groove is made according to the shape of the flow channel just below the upper cover plate 101 of the pump chamber where the fixed magnet 502 is placed, and the original position is filled with the conductive iron sheet 112, and the upper conductive iron sheet 112 is connected to the upper wire 505. A groove is made according to the shape of the flow channel and filled with the lower conductive iron sheet 122 at the position corresponding to the fixed magnet 502 just above the lower cover plate 105 of the pump chamber, and the lower conductive iron sheet 122 is connected to the lower conductive iron sheet 122. The upper wire 505 and the lower wire 506 are connected to the ammeter for monitoring the current.

[0048] The working principle of this embodiment is as follows: The organic glass plate is cut to complete the processing of the pump chamber upper cover plate 101, and holes are punched at specific positions of the pump chamber upper cover plate 101, including: a flow channel inlet hole 109 for constructing the micro pump inlet flow channel, a flow channel outlet hole 110 for constructing the micro pump outlet flow channel, a second mounting hole 111 for supporting and secondary fixing the micro pump system, and a first fixing hole 113, and a first connection hole at the center. The area directly below the pump chamber upper cover plate 101 where the permanent magnet is placed is grooved according to the shape of the flow channel, and the original position is filled with a conductive iron sheet 112.

[0049] The thin rubber sheet is cut to complete the processing of the pump chamber upper cover plate sealing gasket 102, and the third mounting hole 114 and the second fixing hole 115 for supporting and secondary fixing the micro pump system are punched on the pump chamber upper cover plate sealing gasket 102.

[0050] A fourth mounting hole 116 and a third fixing hole 117 are drilled on the pump chamber special-shaped structure 103 for supporting and secondary fixing the micro pump system.

[0051] The thin rubber sheet is cut to complete the processing of the pump chamber lower cover plate sealing gasket 104, and a fifth mounting hole 118 and a fourth fixing hole 119 for supporting and secondary fixing the micro pump system are punched on the pump chamber lower cover plate sealing gasket 104.

[0052] The organic glass plate is cut to complete the processing of the pump chamber lower cover plate 105, and the sixth mounting hole 120 for supporting and secondary fixing the micro pump system, the fifth fixing hole 121, and the first connection hole at the center are punched at a specific position of the pump chamber lower cover plate 105. A buckle groove is processed at a specific position and filled with a conductive iron sheet 122.

[0053] The thin rubber sheet is cut to complete the processing of the upper sealing gasket 106 of the inner circular structure of the pump chamber and the lower sealing gasket 108 of the inner circular structure of the pump chamber, and the second connection hole 123 and the fourth connection hole 125 are respectively punched at the center position.

[0054] The organic glass plate is cut to complete the processing of the circular structure 107 inside the pump chamber, and the third connecting hole 124 is drilled at the center.

[0055] Stack the pump chamber upper cover plate 101, the pump chamber upper cover plate sealing gasket 102, the pump chamber special-shaped structure 103, the pump chamber lower cover plate sealing gasket 104, the pump chamber internal circular structure upper sealing gasket 106, the pump chamber internal circular structure 107, the pump chamber internal circular structure lower sealing gasket 108, and the pump chamber lower cover plate 105 in sequence, and pre-tighten and seal them with screws and nuts. When the structural dimensions need to be changed, only the pump chamber internal circular structure 107 of different diameters needs to be replaced to change the pump chamber flow channel width dimension. When the pump chamber internal circular structure 107 and the pump chamber special-shaped structure 103 are replaced at the same time, the pump chamber flow channel height dimension can be changed. And the main structure does not need to be processed again, only the new structure needs to be replaced after disassembly and assembly. Avoid experimental system errors and processing waste.

[0056] After the pump chamber is assembled as a whole, the pump chamber structure is fixed for a second time using the upper clamping plate 201 and the lower clamping plate 205, in combination with the screws 302 and the nuts 303. Threads are tapped in the first support holes 204 and the second support holes 208 of the upper clamping plate 201 and the lower clamping plate 205, and the upper part of the bracket 301 is also tapped. The bracket 301 is screwed into the clamping plate bracket mounting hole 208 for support, and the height of the pump chamber component mechanism can be adjusted by rotating the bracket 301.

[0057] The positioning holes on the rotating disk 402 have three different diameters of positioning holes D1, D2, and D3. There are three positioning holes of the same diameter, which are arranged on different rotation radius tracks of R1, R2, and R3 respectively. By replacing the rotating magnets 501 of the same diameter with different strengths, the influence of different magnetic field strengths on the performance of the magnetic fluid pump can be studied. By replacing the rotating magnets 501 of different diameters, the influence of the magnet diameter on the performance of the magnetic fluid pump can be studied. By placing the rotating magnets 501 at different rotation radii, the influence of the magnet rotation radius on the performance of the magnetic fluid pump can be studied. The same rotating disk 402 can complete experimental studies on the motion laws of multiple rotating magnets.

[0058] Motor 401 cooperates with rotating disk 402 and rotating magnet 501 to drive black piston ferromagnetic fluid 503. When moving to fixed ferromagnetic fluid 504, due to the different colors of ferromagnetic fluid, it is easy to distinguish the movement of rotating ferromagnetic fluid 503 and fixed ferromagnetic fluid 504 during fusion and separation of ferromagnetic fluid. In addition, when rotating ferromagnetic fluid 503 moves to the position of fixed ferromagnetic fluid 504, due to the formation of uniform magnetic field between rotating magnet 501 and fixed magnet 502 at this position, ferromagnetic fluid is equivalent to the conductor in the gap for cutting magnetic induction line, forming induced current, and transmitting current to ammeter 507 through upper wire 505 and lower wire 506. When the ammeter pointer changes fast or slow, it can reflect the speed of magnetic fluid passing through magnetic induction line, i.e., monitoring of magnetic fluid driving speed. In addition, according to the time from initial change to zero return of ammeter, the length of magnetic fluid can be calculated. According to the pointer change of ammeter 507, the magnetic fluid amount of ferromagnetic fluid can be characterized, so as to achieve the purpose of monitoring the internal system of magnetic fluid pump.

[0059] The present invention has the functions of repeatability, variable structural parameters, visualization and automatic detection, and realizes the detachability and easy transformation of the ferrofluid micropump experimental device. A set of devices can be used to experiment with a variety of different working conditions, avoiding systematic errors caused by replacing experimental equipment and avoiding material waste caused by unnecessary processing.

[0060] The present invention uses electromagnetic principles to monitor the health status of the ferrofluid micropump system. According to the changes in the ammeter pointer, the movement speed and volume of the magnetic fluid can be quickly reflected, and the service life of the magnetic fluid pump can be predicted in advance. The entire experimental device improves the convenience and systematicness of the mechanism research of the magnetic fluid pump system, and provides an experimental basis for the research and development of magnetic fluid pumps.

[0061] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

[0062] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0063] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0064] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A ferrofluid pump experimental device with repeatability, variable structural parameters and visualization, characterized by: It includes a pump chamber component mechanism, a pump chamber support mechanism, a fixed magnet and a rotating magnet, wherein: The pump chamber component structure includes a pump chamber upper cover plate, a pump chamber upper cover plate sealing gasket, a pump chamber special-shaped structure, a pump chamber lower cover plate sealing gasket and a pump chamber lower cover plate, which are stacked in sequence from top to bottom and detachably fixed together; the pump chamber special-shaped structure has a hollow pump chamber that penetrates from top to bottom, and a pump inlet flow channel and a pump outlet flow channel that are connected to the pump chamber; The pump chamber upper cover plate sealing gasket and the pump chamber lower cover plate sealing gasket have the same shape as the pump chamber special-shaped structure, and are used to achieve sealing between the pump chamber upper cover plate and the pump chamber special-shaped structure, and between the pump chamber lower cover plate and the pump chamber special-shaped structure; The upper and lower ends of the pump chamber are closed by the pump chamber upper cover plate and the pump chamber lower cover plate, and a flow channel inlet hole corresponding to and connected with the pump inlet flow channel and a flow channel outlet hole corresponding to and connected with the pump outlet flow channel are provided on the pump chamber upper cover plate; An internal circular structure of the pump chamber is provided in the pump chamber, and a circular microchannel is formed between the internal circular structure of the pump chamber and the special-shaped structure of the pump chamber; an upper sealing gasket of the internal circular structure of the pump chamber and a lower sealing gasket of the internal circular structure of the pump chamber, which are consistent with the internal circular structure of the pump chamber, are provided above and below the internal circular structure of the pump chamber, respectively, so as to realize the sealing between the internal circular structure of the pump chamber and the upper cover plate of the pump chamber, and between the internal circular structure of the pump chamber and the lower cover plate of the pump chamber; The upper sealing gasket of the pump chamber internal circular structure, the pump chamber internal circular structure and the lower sealing gasket of the pump chamber internal circular structure are detachably fixed between the pump chamber upper cover plate and the pump chamber lower cover plate; A pump chamber supporting mechanism is arranged around the pump chamber component mechanism to support the pump chamber component mechanism; A fixed ferromagnetic fluid and a piston ferromagnetic fluid are arranged in the annular microchannel; a fixed magnet is arranged on the upper side of the upper cover plate of the pump chamber at a position corresponding to the fixed ferromagnetic fluid; a rotating magnet is arranged on the lower side of the lower cover plate of the pump chamber, and the rotating magnet has a rotating track cooperating with the annular microchannel under the action of the rotating unit, and is used to drive the ferromagnetic fluid piston to move in the annular microchannel.

2. The ferrofluid pump experimental device with repeatability, variable structural parameters and visualization according to claim 1, characterized in that: The pump chamber special-shaped structure is provided with a plurality of third fixing holes arranged circumferentially on the outer side of the pump chamber, and the pump chamber upper cover plate, the pump chamber upper cover plate sealing gasket, the pump chamber lower cover plate sealing gasket and the pump chamber lower cover plate are respectively provided with a first fixing hole, a second fixing hole, a fourth fixing hole and a fifth fixing hole at corresponding positions, and the corresponding first fixing hole, second fixing hole, third fixing hole, fourth fixing hole and fifth fixing hole are passed through screws and fixed by nuts.

3. The ferrofluid pump experimental device with repeatability, variable structural parameters and visualization according to claim 1 or 2, characterized in that: A third connecting hole is provided on the internal circular structure of the pump chamber, and a first connecting hole, a second connecting hole, a fourth connecting hole and a fifth connecting hole are respectively provided at corresponding positions of the upper cover plate of the pump chamber, the upper sealing gasket of the internal circular structure of the pump chamber, the lower sealing gasket of the internal circular structure of the pump chamber and the lower cover plate of the pump chamber, and the corresponding first connecting hole, second connecting hole, third connecting hole, fourth connecting hole and fifth connecting hole are passed through screws and fixed by nuts.

4. The ferrofluid pump experimental device with repeatability, variable structural parameters and visualization according to claim 1, characterized in that: The pump chamber support mechanism is distributed at the four corners of the pump chamber component mechanism, and the pump chamber support mechanism includes an upper clamping plate and a lower clamping plate distributed on the upper and lower sides of the pump chamber component mechanism, and the upper clamping plate and the lower clamping plate are respectively provided with a first locking hole and a second locking hole, and the corresponding first locking hole and the second locking hole are fixed on the pump chamber component mechanism by screws passing through the upper and lower parts and matching nuts; It also includes a bracket, and the upper and lower clamping plates are provided with first and second supporting holes at corresponding positions. The upper end of the bracket is provided with an external thread and is threadedly connected with the corresponding first and second supporting holes.

5. The ferrofluid pump experimental device with repeatability, variable structural parameters and visualization according to claim 4, characterized in that: The upper clamping plate and the lower clamping plate are respectively provided with corner slots; the corners of the pump chamber component mechanism are located at the corner slots of the upper clamping plate and the lower clamping plate, and the upper clamping plate and the lower clamping plate are distributed with a first mounting hole and a seventh mounting hole at the corner slots; the pump chamber upper cover plate, the pump chamber upper cover plate sealing gasket, the pump chamber special-shaped structure, the pump chamber lower cover plate sealing gasket and the pump chamber lower cover plate are respectively provided with a second mounting hole, a third mounting hole, a fourth mounting hole, a fifth mounting hole and a sixth mounting hole at corresponding positions of the four corners; Screws are passed through the corresponding first mounting hole, second mounting hole, third mounting hole, fourth mounting hole, fifth mounting hole, sixth mounting hole and seventh mounting hole and are fixed by nuts.

6. The ferrofluid pump experimental device with repeatability, variable structural parameters and visualization according to claim 1, characterized in that: The pump chamber upper cover plate, the pump chamber special-shaped structure, the pump chamber internal circular structure and the pump chamber lower cover plate are made of transparent plates.

7. The ferrofluid pump experimental device with repeatability, variable structural parameters and visualization according to claim 1, characterized in that: The rotating unit comprises a rotating disk, which is connected to the motor by transmission; a plurality of rotating tracks are arranged on the rotating disk, and different rotating tracks have different rotating radii; A plurality of positioning holes are arranged on each rotating track, and the positioning holes are used to place rotating magnets; the diameters of the positioning holes on the same rotating track are the same; the diameters of the positioning holes on different rotating tracks are the same or different.

8. The ferrofluid pump experimental device with repeatability, variable structural parameters and visualization according to claim 1 or 7, characterized in that: The gap between the rotating magnet and the lower cover plate of the pump chamber is less than 1 mm.

9. The ferrofluid pump experimental device with repeatability, variable structural parameters and visualization according to claim 1, characterized in that: The stationary ferrofluid and the piston ferrofluid have different colors.

10. The ferrofluid pump experimental device with repeatability, variable structural parameters and visualization according to claim 1, characterized in that: It also includes a detection mechanism, which includes an ammeter. A groove is provided on the upper cover plate of the pump chamber at a position corresponding to the fixed magnet and filled with an upper conductive iron sheet, and the upper conductive iron sheet is connected to an upper wire. A groove is provided on the lower cover plate of the pump chamber at a position corresponding to the fixed magnet and filled with a lower conductive iron sheet, and the lower conductive iron sheet is connected to a lower wire. The upper wire and the lower wire are connected to the ammeter.

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