CN102664511A - Method for generating electromagnetic force with temporal and spatial variation in conducting liquid by adopting fluid driving - Google Patents

Abstract

The invention relates to a method for generating a time-space-varying electromagnetic force in a conductive liquid driven by a fluid, and belongs to the technical fields of electromagnetic metallurgy, semiconductor material preparation, chemical industry and glass industry. Firstly, a cylindrical cavity is formed in the conductive liquid, and the cavity is provided with a drive fluid passage port, the turbine blade is placed in the cylindrical cavity, and the permanent magnet and the turbine blade are relatively fixed; the drive fluid flows from the cavity at a period P The passage port of the body enters or flows out, and the driving fluid drives the turbine blades to rotate forward or reverse at a period P, and drives the permanent magnet to rotate, generating a rotating magnetic field with a periodically changing direction, and generating a vortex in the conductive liquid around the outside of the cavity. The electric current, the rotating magnetic field and the eddy current interact to generate an electromagnetic force that drives or stirs the conductive liquid. The electromagnetic driver formed by the method of the invention can be used in the fields of improving macroscopic segregation, metal alloying process, preparing gradient materials, composite materials and the like in the process of metal solidification.

Description

Method of using fluid actuation to generate spatiotemporally varying electromagnetic forces in conductive liquids

technical field

The invention relates to a method for generating a time-space-varying electromagnetic force in a conductive liquid driven by a fluid, and belongs to the technical fields of electromagnetic metallurgy, semiconductor material preparation, chemical industry and glass industry.

Background technique

Due to the restriction of the skin effect, the traditional electromagnetic actuation technology is extremely limited in the actuation effect for larger-sized conductive liquids. The patent (application number: 201210039850.3) proposes a method of using fluid as the driving medium to generate electromagnetic force in a conductive liquid, replacing the electric or mechanical drive in the prior art with fluid drive, so as to simplify the structure of the electromagnetic drive and increase the design flexibility. flexibility, and expand the application range of electromagnetic drives. However, the traditional electromagnetic drive technology and the above method have the following disadvantages: the magnetic field has a single form, and the generated electromagnetic force has a relatively fixed spatial distribution, so the flow field of the driven conductive fluid generally does not change with time, and the spatial distribution of the electromagnetic force in the conductive liquid Poor adjustability has the following disadvantages:

(i) For the solidification of alloys, due to the fixed forced convection mode of the metal liquid, the solute redistribution effect is poor, and studies have shown (Wang Xiaodong et al., Materials Forum, Vol. 508, pp. 163-168): sometimes inappropriate The action of electromagnetic field not only cannot eliminate the concentration segregation, but also increases the concentration segregation, directly destroying the service performance of the material;

(ii) A stable thermal boundary layer is formed in the conductive fluid, and the heat transfer effect is poor when sufficient heat transfer is required;

(iii) A stable fluid flow boundary layer is formed in the conductive fluid, and the conductive liquid cannot be stirred sufficiently;

(iv) A designable higher electromagnetic force density gradient field cannot be obtained as required.

The applicant once published a model electromagnetic force method based on traditional electromagnetic stirring technology (Wang Xiaodong et al., Metallurgy and Materials Communication B, Periodic Countercurrent I and II Driven by Model Electromagnetic Field, Volume 40, 2009, 82- 90 pages, 104-113 pages), the electromagnetic force field in the solidification front mode can cause the periodic flow of the melt, fully change the redistribution process of the solute, and can significantly improve the concentration segregation in the solidification process within the range of the optimized mode frequency the goal of.

Contents of the invention

The purpose of the present invention is to propose a method of using fluid to drive the electromagnetic force that generates spatiotemporal changes in the conductive liquid, to improve the existing method for generating the electromagnetic force in the conductive fluid, and to obtain by driving the fluid flow and direction changes Periodically varying electromagnetic force fields to expand the use of electromagnetic forces generated by fluid actuation.

The method of adopting fluid to drive the electromagnetic force that produces spatiotemporal changes in the conductive liquid proposed by the present invention has multiple different schemes, wherein the first scheme includes the following steps:

(1) A cylindrical cavity is formed in the conductive liquid, and the first channel opening and the second channel opening of the driving fluid are arranged on the cavity;

(2) Place the turbine blade in the cylindrical cavity, install the turbine blade on the bearing, and install the bearing coaxially with the cylindrical cavity;

(3) Relatively fix the permanent magnet and the turbine blade;

(4) Make the driving fluid enter or flow out from the first channel port or the second channel port on the cylindrical cavity at a period P, and the driving fluid drives the turbine blades to rotate forward or reverse at a period P, and drives the permanent magnet to The period P rotates forward or reversely to generate a rotating magnetic field whose direction changes with a period P. The rotating magnetic field generates an eddy current in the conductive liquid around the outside of the cylindrical cavity. The rotating magnetic field interacts with the eddy current to generate a direction with a period P. The changing electromagnetic force drives or stirs the conductive liquid.

In the above-mentioned first solution, the relative fixed form of the permanent magnet and the turbine blade is as follows: two disc-shaped connecting plates are arranged, and the two connecting plates are respectively placed on both sides of the turbine blade, and the inner sides of the two connecting plates are respectively Connected with the turbine blades, a first permanent magnet and a second permanent magnet are respectively arranged on the outer sides of the two connecting plates to form a first magnetic field and a second magnetic field.

In the above-mentioned first solution, the relative fixed form of the permanent magnet and the turbine blade is as follows: a cylindrical connecting plate is set, the turbine blade is connected with the cylindrical connecting plate, and the cylindrical connecting plate is located at the outer end of the turbine blade In the first part, the permanent magnet is installed on the cylindrical connecting plate, and the fifth channel port and the sixth channel port are placed on the end surface of the cylindrical cavity.

The second option includes the following steps:

(1) Set an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder are installed coaxially, a sleeve-shaped cavity is formed between the inner cylinder and the outer cylinder, and the end surface of the sleeve-shaped cavity is provided with a first drive fluid. Seventh passageway and eighth passageway;

(2) Set a cylindrical connecting plate, the turbine blade is connected to one side of the cylindrical connecting plate, the cylindrical connecting plate is located at the inner end of the turbine blade, and the permanent magnet is installed on the other side of the cylindrical connecting plate , the turbine blade is placed in the cylindrical cavity, the turbine blade is installed on the bearing, and the bearing is coaxially installed with the cylindrical cavity;

(3) The driving fluid enters or flows out from the seventh or eighth channel on the cylindrical cavity with a period P, and the driving fluid drives the turbine blades to rotate forward or reverse with a period P, and drives the permanent magnet to The period P rotates forward or reversely to generate a rotating magnetic field whose direction changes with the period P. The rotating magnetic field generates an eddy current in the conductive liquid inside the inner cylinder and outside the outer cylinder. The rotating magnetic field interacts with the eddy current to generate a direction Drive or stir the conductive liquid with the changing electromagnetic force of period P.

The third option includes the following steps:

(1) Set an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder are installed coaxially, a sleeve-shaped cavity is formed between the inner cylinder and the outer cylinder, and the end surface of the cavity is provided with a seventh channel port for driving fluid and the eighth aisle;

(2) Set a cylindrical connecting plate, the turbine blade is connected to one side of the cylindrical connecting plate, the cylindrical connecting plate is located at the inner end of the turbine blade, and the permanent magnet is installed on the other side of the cylindrical connecting plate , the turbine blade is placed in the cylindrical cavity, the turbine blade is installed on the bearing, and the bearing is coaxially installed with the cylindrical cavity;

(3) The driving fluid enters or flows out from the seventh or eighth channel on the cylindrical cavity with a period P, and the driving fluid drives the turbine blades to rotate forward or reverse with a period P, and drives the permanent magnet to The period P rotates in the forward or reverse direction to generate a rotating magnetic field whose direction changes with the period P, and eddy currents are generated in the conductive liquid inside the inner cylinder and outside the outer cylinder, and the rotating magnetic field interacts with the eddy current to generate a space-time period The electromagnetic force of sex change drives or stirs the conductive liquid.

The fourth option includes the following steps:

(1) A first cylindrical cavity and a second cylindrical cavity are formed in the conductive liquid. The first cylindrical cavity is respectively provided with the ninth channel port and the tenth channel port of the driving fluid, and the second cylindrical cavity The body is respectively provided with an eleventh channel port and a twelfth channel port for driving fluid;

(2) The turbine blades are respectively placed in the first cylindrical cavity and the second cylindrical cavity, the turbine blades are installed on the bearings, and the bearings are coaxially installed with the cylindrical cavity;

(3) Fixing the first permanent magnet and the second permanent magnet to the turbine blades respectively;

(4) Let the driving fluid flow from the ninth or tenth channel port of the first cylindrical cavity and the eleventh or twelfth channel port on the second cylindrical cavity with a cycle P or P' respectively In or out, the driving fluid drives the turbine blades to rotate forward or reverse with the period P or P', and drives the permanent magnet to generate a rotating magnetic field that changes with the period P or P', and conducts electricity around the outside of the two cylindrical cavities An eddy current is generated in the liquid, and the rotating magnetic field interacts with the eddy current to generate an electromagnetic force field that changes in time and space, driving or stirring the conductive liquid.

The method proposed by the present invention to drive the electromagnetic force generated in the conductive liquid by using the fluid to generate the space-time variation has the advantage that: the electromagnetic driver manufactured by the method used to drive the electromagnetic force generated by the fluid in the conductive liquid proposed by the present invention has simple and convenient means of implementation, Reliable; a periodically changing electromagnetic force field is realized by driving the fluid flow and direction changes. The frequency of the periodic change of the electromagnetic force can be adjusted in a wide range according to actual needs, and the magnitude of the electromagnetic force can also be adjusted by changing the flow rate of the driving fluid. Therefore, the range of application fields is greatly expanded. The design of the rotating magnetic field structure is flexible and diverse, for example, the disk-shaped magnetic field structure using arc or bar-shaped permanent magnet units, the magnetic field of the spiral structure, the cylindrical magnetic field of the magnetic magic ring structure, etc.; the designability and The controllability is very high, such as the high electromagnetic force density gradient field can be realized in the conductive liquid.

The electromagnetic driver manufactured by the method of generating electromagnetic force in the conductive liquid according to the fluid drive proposed by the present invention can be used in the process of metal solidification to improve macro-segregation, especially when the volume of the metal melt is large; it can be used for metal alloying Process: disperse the added alloy elements; can be used in the process of preparing gradient materials and composite materials: generate a large electromagnetic force density field in the conductive liquid; can be used in the process of metal transportation and die casting (including compact casting) Homogenization of liquid temperature field; can be used to accelerate metallurgical processes such as degassing and desulfurization.

Description of drawings

Fig. 1 is a schematic diagram of the principle of the method of using fluid drive to generate a time-space-varying electromagnetic force in a conductive liquid proposed by the present invention, and it is also a schematic structural diagram of the first magnetic driver designed according to the method of the present invention.

Fig. 2 is a waveform diagram of the change of the flow rate and direction of the driving fluid with time in one cycle.

Fig. 3 is a structural schematic diagram of a second magnetic driver designed according to the method of the present invention.

Fig. 4 is a structural schematic diagram of a third magnetic driver designed according to the method of the present invention.

Fig. 5 is a structural schematic diagram of a fourth magnetic driver designed according to the method of the present invention.

6 and 7 are schematic diagrams of two different structures of permanent magnets in the magnetic actuator shown in FIGS. 4 and 5, respectively.

Fig. 8 is a working state diagram of the fifth magnetic driver designed according to the method of the present invention.

FIG. 9 is another working state diagram of the magnetic driver shown in FIG. 8 .

In Figures 1 to 9, 1 is a conductive liquid; 2 is a cylindrical cavity; 3 is the first channel opening; 4 is the second channel opening; 5 is the turbine blade; 6 is the bearing; 7 is the permanent magnet; 8 is the turbine 9 is the flow direction of the conductive liquid; 10 is the third channel opening; 11 is the fourth channel opening; 12 is the disc-shaped first connecting plate; 13 is the disc-shaped second connecting plate; 14 is the first permanent Magnet (composed of arc-shaped permanent magnet units); 15 is the second permanent magnet (composed of bar-shaped permanent magnet units); 16 is a cylindrical connecting plate; 17 is the fifth channel port; 18 is the sixth channel port; 19 20 is the seventh passage opening; 21 is the eighth passage opening; 22 is the spiral permanent magnet; 23 is the magnetization direction of the permanent magnet; 24 is the spiral permanent magnet support frame; 25 is the rotation direction of the magnetic field 26 is the permanent magnet of magnetic magic ring structure; 27 is the first cylindrical cavity; 28 is the second cylindrical cavity; 29 is the ninth channel port; 30 is the tenth channel port; 31 is the eleventh channel port ; 32 is the twelfth channel mouth.

Detailed ways

In the following, the method of using fluid to drive the electromagnetic force that generates spatiotemporal changes in the conductive liquid proposed by the present invention will be described in detail with reference to the accompanying drawings.

The inventive method has multiple different schemes, wherein adopts the structure of the magnetic driver of first kind of scheme design as shown in Figure 1, comprises the following steps:

(1) A cylindrical cavity 2 is formed in the conductive liquid 1, and the cavity is provided with a first channel port 3 and a second channel port 4 for driving fluid;

(2) Place the turbine blade 5 in the cylindrical cavity 1, install the turbine blade 5 on the bearing 6, and install the bearing 6 coaxially with the cylindrical cavity 2;

(3) Relatively fixing the permanent magnet 7 and the turbine blade 5;

(4) Make the driving fluid enter or flow out from the first channel port 3 or the second channel port 4 on the cylindrical cavity at a period P, and the driving fluid drives the turbine blade 5 to rotate forward or reverse at a period P, and drives The permanent magnet 7 rotates in the forward or reverse direction with a period P. The direction of rotation 8 of the turbine blade and the flow direction 9 of the conductive fluid are shown in FIG. The rotating magnetic field of (period P), the rotating magnetic field generates eddy current in the conductive liquid 1 around the cylindrical cavity 2, and the rotating magnetic field interacts with the eddy current to generate an electromagnetic force whose direction changes periodically (period P), driving Or stir conductive liquid1.

Fig. 1 has shown the basic principle of the method of the present invention, realize the periodic change of the direction of rotation of the turbine blade 5 by driving the periodic change of the flow direction of the fluid, so that the permanent magnet 7 moving with it also realizes the periodic change of the direction of rotation Variety. As shown in Figure 1(a) and Figure 1(b), the period of change is P, the frequency is: f=1/P, and the turbine blades rotate counterclockwise (or Clockwise) rotation, clockwise (or counterclockwise) rotation within the (P-T) time period. This change is through the first channel port 3 as a fluid inflow port, the second channel port 4 as a fluid outflow port, or the second channel port 4 as a fluid inflow port, and the first channel port 3 as a fluid outflow port, which alternates periodically to achieve.

Fig. 2 shows the waveform diagram of the flow rate and direction of the driving fluid changing with time in one cycle, assuming that the flow rate of the driving fluid is Q, the direction in which the driving fluid flows from the first channel port 3 is marked as positive, and the direction from the first channel port 3 is marked as positive. The outflow direction is recorded as negative, and the periodic change of the driving fluid flow rate with time can be represented by the square wave (i) in Figure 2(c), which can also be a square wave, or a positive (cos) sine wave, or similar Other waveforms of sine (cosine) waves are shown in curve (ii) in Fig. 2(c). In addition, due to the inertia of the driving fluid and the consideration of mechanical safety, it takes a certain amount of time for the driving fluid to change direction, and the time required for the change is 2T _p , generally requiring P>>T _p , as shown in the curve (iii) in Figure 2(c) ) to ensure that the conductive liquid 1 is not only fully driven (the amplitude of the driving strength tends to be saturated), but also realizes the pattern flow with obvious periodic characteristics. The periodic change of the driving fluid can also have another intermittent form, as shown in Figure 2(d), the driving fluid acts for a certain period of time (0<T<P) in one cycle, and the rest of the time Drive fluid flow is zero.

The periodicity of the flow of the driven conductive liquid 1 has the following characteristics: the periodicity of the flow of the driving fluid is the same as the periodicity of the electromagnetic force received by the driven conductive liquid; The flow rate has a certain relationship. To obtain a flow with obvious periodic characteristics for the conductive fluid 1, the flow rate of the driving fluid must be greater than a certain threshold; To realize the periodic flow of the conductive liquid 1, the period P must also be greater than a certain threshold. Considering the size characteristics and application field of the magnetic actuator, the frequency f of the electromagnetic force field received by the conductive liquid 1 is generally less than 0.2 Hz (the period P is greater than 5 seconds).

The structure of the magnetic driver designed according to the second scheme of the method of the present invention is shown in FIG. The passage port 10 and the fourth passage port 11 of the driving fluid, the permanent magnet 7 and the turbine blade 8 are relatively fixed in the form that two connecting plates 12 and 13 are arranged, and the two connecting plates 12 and 13 are respectively placed on the turbine blade 8 The inner sides of the two connecting plates 12, 13 are respectively connected to the turbine blades 8, and the outer sides of the two connecting plates 12, 13 are respectively provided with a first permanent magnet 14 and a second permanent magnet 15 to form a first magnetic field and a second magnetic field. magnetic field.

It can be seen from Fig. 3(e) and Fig. 3(f) that in this structure, the connecting plates 12 and 13 are disk-shaped and parallel to the end face of the cylindrical cavity 2, and adopt a double permanent magnet magnetic field structure, that is, the first A permanent magnet 14 and a second permanent magnet 15 are used to realize a spatially varying electromagnetic force field. The bearing 6 is located in the center of the cylindrical cavity cavity 2, the inner ring of the bearing 6 is connected with the cylindrical cavity 2, and the outer ring of the bearing 6 is connected with the turbine blade 5, so as to ensure that the turbine blade 5 can rotate freely under the action of the driving fluid, and the bearing The outer ring of 6 is also connected with two disc-shaped connecting plates 12,13 on both sides of the turbine blade 5, and the inner sides of the two connecting plates 12,13 are respectively connected with the turbine blade 5, and the two connecting plates 12,13 The first permanent magnet 14 and the second permanent magnet 15 are arranged on the outside respectively, and the two permanent magnets 14, 15 have different structures by design, as shown in Fig. 3(g) and Fig. 3(h), the first permanent magnet 14 The magnet unit shapes of the second permanent magnet and the second permanent magnet 15 are arc-shaped and elongated permanent magnets respectively. The permanent magnet unit can also be designed into other shapes as required. The rotation of the permanent magnet generates eddy currents with different spatial distributions, which form electromagnetic force fields with different spatial distributions in the conductive liquid. According to the requirement, a region with a large electromagnetic force density gradient can be obtained in the conductive liquid 1, and such a space-varying large gradient electromagnetic force field can be used in the special preparation process of certain materials.

The structure of the magnetic actuator designed according to the third solution of the method of the present invention is shown in FIG. 4, wherein FIG. 4(i) is a schematic diagram of the internal structure of a cylindrical cavity, and FIG. 4(j) is a side view thereof. The permanent magnet 7 and the turbine blade 5 are relatively fixed in the form that a cylindrical connecting plate 16 is provided, and the cylindrical connecting plate 16 is coaxial with the cylindrical cavity 2 . The turbine blade 5 is connected (connected or embedded) with a cylindrical connecting plate 16 located at the outer end of the turbine blade 5 , and the permanent magnets 14 and 15 are installed on the cylindrical connecting plate 16 . As shown in Figure 4(j), the two passage ports of the driving fluid are located on the two end faces of the cylindrical cavity 2, which are denoted as the fifth passage port 17 and the sixth passage port 18 of the driving fluid. At this time, the turbine blade 8 It can be designed as a three-dimensional special-shaped structure to ensure that the turbine blade 8 rotates freely and smoothly under the drive of the driving fluid.

The structure of the magnetic driver designed according to the fourth scheme of the method of the present invention is shown in Figure 5, an inner cylinder and an outer cylinder are arranged, the inner cylinder and the outer cylinder are coaxially installed, and have two end faces to form a sleeve-shaped cavity body 19, wherein Fig. 5(k) is a schematic diagram of the internal structure of the sleeve-shaped cavity 19, and Fig. 5(l) is a side view thereof, and the end face of the sleeve-shaped cavity 19 is provided with a seventh passage port 20 for driving fluid and the eighth channel port 21; the outer ring of the bearing 6 is coaxially installed on the inner wall of the outer cylinder of the sleeve-shaped cavity 19, the inner ring of the bearing 6 is connected with the turbine blade 5, and a cylindrical connecting plate 16 is set, and the circle The outer side of the cylindrical connecting plate 16 is connected to the inner end of the turbine blade 5 , and the permanent magnet 14 or 15 is mounted on the inner side of the cylindrical connecting plate (connected or embedded therein). When working, the driving fluid enters or flows out from the seventh passage port 20 or the eighth passage port 21 on the cylindrical cavity with a period P, and the driving fluid drives the turbine blade 5 to rotate forward or reverse with a period P, and drives the permanent The magnet rotates in the forward or reverse direction with the period P to generate a rotating magnetic field that rotates in the forward or reverse direction with the period P. An eddy current is generated in the conductive liquid 1 in the central part of the sleeve-shaped cavity 19. The rotating magnetic field and the eddy current The current interaction produces an electromagnetic force that changes with a period P to drive or stir the conductive liquid 1 .

FIG. 6 is a schematic structural view of the permanent magnet in the magnetic driver shown in FIG. 4 and FIG. 5 above. Figure 6(m) is a schematic diagram of the structure of the spiral magnetic field. The spiral magnetic field is generated by the spiral permanent magnet 22. The magnetization direction 23 of each point on the magnet is along the radial direction. The spiral permanent magnet 22 and the support frame 24 form a sleeve. Shaped structure is connected with sleeve-shaped connecting plate 16. The helical permanent magnet 22 shown in FIG. 6( m ) can be used as the permanent magnet in the magnetic drive shown in FIGS. 4 and 5 . Figure 6(m) also shows the direction of rotation 25 of the magnetic field. Its working principle is shown in Figure 6(n) and Figure 6(o). There are two working modes here: one is to use the working state shown in Figure 6(n) or Figure 6(o) alone, and the velocity field Circumferential and axial velocity components can be expressed as (V _φ , V _z ), (-V _φ , -V _z ) respectively, and the flow field does not change with time; Rotate (Figure 6(n)) or clockwise (Figure 6(o)), correspondingly, the helical magnetic field rotates clockwise (Figure 6(o)) or counterclockwise (Figure 6(o)) in time (PT) n)), the helical permanent magnet 22 rotates under the drive of the driving fluid, generating a corresponding flow of a three-dimensional helical structure in the conductive liquid 1, and the flow direction 9 is shown in Fig. 6(n) and Fig. 6(o) , it can be seen that the magnetic actuator with this structure will generate an electromagnetic force field that changes periodically in time and space in the conductive liquid 1 .

FIG. 7 is another schematic structural view of the permanent magnet in the magnetic actuator shown in FIGS. 4 and 5 above. Wherein Fig. 7 (p) is the schematic diagram of the magnetic field 26 of a kind of traditional eight-unit magnetic magic ring structure, the arrow on the permanent magnet indicates the magnetization direction 23 of this magnet unit, and the magnetic field is evenly distributed on the central section of the vertical axis, The magnetic field has a Gaussian distribution on the axis, that is, the magnetic field decays rapidly as the distance away from the magnet increases in the axial direction. The distribution of the electromagnetic field intensity in the axial direction can be adjusted by the height of the magnetic magic ring. Such a design is very beneficial for generating a higher electromagnetic force density gradient field in the conductive liquid. The permanent magnet 25 of the magnetic magic ring structure shown in FIG. 7( p ) can be used as the permanent magnet in the magnetic driver shown in FIG. 4 and FIG. 5 . Fig. 7(q) and Fig. 7(r) are working principle diagrams of the permanent magnet with magnetic magic ring structure in the present invention. Figure 7(p) also shows the direction of rotation 25 of the magnetic field. Its working principle is shown in Figure 7(q) and Figure 7(r), and there are two working modes: one is to use Figure 7(q) or Figure 7(r) alone; the second is to spiral in time T The spiral magnetic field rotates counterclockwise (Figure 7(q)) or clockwise (Figure 7(r)), and correspondingly, the helical magnetic field rotates clockwise (Figure 7(r)) or counterclockwise in time (P-T) Rotate (Figure 7(q)), the permanent magnet 25 of the magnetic magic ring structure rotates under the drive of the driving fluid, and generates a corresponding three-dimensional spindle-shaped flow in the conductive liquid 1, and the flow directions 9 are respectively shown in Figure 7(q) and shown in Figure 7(r).

It should be pointed out that the above is an example to illustrate that a spatially varying electromagnetic force field is generated in the conductive liquid 1 under the action of the magnetic actuator of the present invention through a specific magnetic field design, so it is not limited to other methods that can generate a spatially varying electromagnetic force field. magnetic field structure.

The structure of the magnetic driver designed according to the fifth scheme of the method of the present invention is as shown in Figure 8, and the method comprises the following steps:

(1) The first cylindrical cavity 27 and the second cylindrical cavity 28 are formed in the conductive liquid 1, and the ninth channel port 29 and the tenth channel port 30 of the driving fluid are respectively provided on the first cylindrical cavity 27 , the second cylindrical cavity 28 is respectively provided with the eleventh passage port 31 and the twelfth passage port 32 of the driving fluid;

(2) Place the turbine blade 5 in the first cylindrical cavity 27 and the second cylindrical cavity 28 respectively, the turbine blade 5 is installed on the bearing 6, and the bearing 6 is coaxially installed with the cylindrical cavity 27, 28;

(3) Fixing the permanent magnets 7 to the turbine blades 5 respectively;

(4) Let the driving fluid flow from the ninth channel port 29 or the tenth channel port 30 of the first cylindrical cavity 27 and the eleventh channel port 31 or The twelfth channel port 32 enters or flows out, and the driving fluid drives the turbine blade 5 to rotate forward or reverse with a period P or P', and drives the permanent magnet to rotate in a periodical direction (period P or P'). The magnetic field generates eddy currents in the conductive liquid 1 around the outside of the two cylindrical cavities 27 and 28, and the rotating magnetic field interacts with the eddy currents to generate an electromagnetic force field that changes in time and space (period P or P'), driving or stirring the conductive Liquid 1.

Fig. 8 (s) and Fig. 8 (t) have shown the situation that two magnetic drivers are arranged side by side, through the ninth channel port 29, the tenth channel port 30, the eleventh channel port 31, the twelfth channel port 32 The setting of the driving fluid flow direction can realize the opposite rotation direction of the two magnetic drives, that is, one of them rotates in the counterclockwise direction, and the other rotates in the clockwise (counter) direction, and the cycle is performed according to a certain period P Sexual changes. In this structure, according to the principle that the same magnetic poles repel each other and the opposite sex attracts each other, an associated magnetic field is established between the two magnetic drivers arranged side by side. Under the action of this associated magnetic field, the flow direction of the conductive liquid is shown in Figure 9. As shown in , a periodic flow is formed in the conductive liquid 1 .

As shown in Figure 9(u) and Figure 9(v), through the setting of the ninth channel port 29, the tenth channel port 30, the eleventh channel port 31, and the twelfth channel port 32, two channels can be realized. The rotation directions of the two magnetic drives are the same, that is, one of them rotates in the counterclockwise direction, and correspondingly, the other rotates in the counterclockwise direction, and changes periodically according to a certain period P. In order to generate a higher electromagnetic force density gradient field in the conductive liquid, the rotation directions of the two magnetic drivers are set to be the same, and a periodic and high electromagnetic force density gradient is formed in the conductive liquid between the two magnetic drivers Field, and then generate a flow velocity field with a large gradient in the conductive liquid.

In addition, in the method of the present invention, since the flow rate of the driving fluid has a certain functional relationship with the electromagnetic force received by the driven conductive liquid, generally, the greater the flow rate of the driving fluid, the greater the electromagnetic force obtained (the electromagnetic force has not reached saturation state). Therefore, the electromagnetic force field required for practical applications can also be obtained in the conductive liquid by adjusting the flow rate of the driving fluid.

Claims (5)

1. method that adopts fluid drives in conducting liquid, to produce the electromagnetic force of change in time and space is characterized in that this method may further comprise the steps:

(1) in conducting liquid, form a circular cylindrical cavity, cavity is provided with the first passage mouth and the second channel mouth of drive fluid;

(2) turbo blade is placed circular cylindrical cavity, turbo blade is installed on the bearing, bearing and the coaxial installation of circular cylindrical cavity;

(3) with permanent magnet and turbo blade relative fixed;

(4) drive fluid is got into first passage mouth or the second channel mouth of cycle P from the circular cylindrical cavity or flow out; Drive fluid drives turbo blade and rotates forward or backwards with cycle P work, and the drive permanent magnet makes to rotate forward or backwards the rotating magnetic field that the generation direction changes with cycle P with cycle P; In the conducting liquid of circular cylindrical cavity exterior circumferential, produce vortex flow; Rotating magnetic field and vortex flow interact, and produce the electromagnetic force that direction changes with cycle P, drive or stir conducting liquid.

2. the method for claim 1; It is characterized in that the relatively-stationary form of wherein said permanent magnet and turbo blade is: two discoid connecting plates are set; Two connecting plates place the both sides of turbo blade respectively; The inboard of two connecting plates is connected with turbo blade respectively, and the outside of two connecting plates is provided with first permanent magnet and second permanent magnet respectively, forms first magnetic field and second magnetic field.

3. the method for claim 1; It is characterized in that the relatively-stationary form of wherein said permanent magnet and turbo blade is: a cylindrical shape connecting plate is set; Turbo blade is connected with the cylindrical shape connecting plate; The cylindrical shape connecting plate is positioned at the outer end of turbo blade, and permanent magnet is installed on the cylindrical shape connecting plate, and five-way road junction and the 6th passway place the end face of circular cylindrical cavity.

4. method that adopts fluid drives in conducting liquid, to produce the electromagnetic force of change in time and space is characterized in that this method may further comprise the steps:

(1) inner core and a urceolus are set, the coaxial installation of inner core and urceolus forms a sleeve shaped cavity between inner core and the urceolus, and the end face of cavity is provided with the 7th passway and the 8th passway of drive fluid;

(2) a cylindrical shape connecting plate is set; Turbo blade is connected with a side of cylindrical shape connecting plate; The cylindrical shape connecting plate is positioned at the inner end of turbo blade, and permanent magnet is installed in the opposite side of cylindrical shape connecting plate, and turbo blade is placed circular cylindrical cavity; Turbo blade is installed on the bearing, bearing and the coaxial installation of circular cylindrical cavity;

(3) drive fluid is got into the 7th passway or the 8th passway of cycle P from the circular cylindrical cavity or flow out; Drive fluid drives turbo blade and does to rotate forward or backwards with cycle P; And drive permanent magnet with the rotation forward or backwards of cycle P do; Produce the rotating magnetic field that direction changes with cycle P, in the conducting liquid in the outside of the inboard of inner core and urceolus, produce vortex flow, rotating magnetic field and vortex flow interaction; Produce the electromagnetic force of cyclic variation on the space-time, drive or stir conducting liquid.

5. method that adopts fluid drives in conducting liquid, to produce the electromagnetic force of change in time and space is characterized in that this method may further comprise the steps:

(1) in conducting liquid, forms first circular cylindrical cavity and second circular cylindrical cavity; Be respectively equipped with the 9th passway and the tenth passway of drive fluid on first circular cylindrical cavity, be respectively equipped with the 11 passway and the 12 passway of drive fluid on second circular cylindrical cavity;

(2) respectively turbo blade is placed first circular cylindrical cavity and second circular cylindrical cavity, turbo blade is installed on the bearing, bearing and the coaxial installation of circular cylindrical cavity;

(3) with first permanent magnet and second permanent magnet respectively with the turbo blade relative fixed;

(4) make drive fluid with cycle P or P ' respectively from the 9th passway of first circular cylindrical cavity or the 11 passway on the tenth passway and second circular cylindrical cavity or the 12 passway get into or flow out; Drive fluid drives turbo blade and does to rotate forward or backwards with cycle P or P '; And the drive permanent magnet produces the rotating magnetic field that changes with cycle P or P '; In the conducting liquid of two circular cylindrical cavity exterior circumferential, produce vortex flow; Rotating magnetic field and vortex flow interact, and produce the electromagnetic force field of change in time and space, drive or stir conducting liquid.

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