Magnetohydrodynamic propeller experimental device

Abstract

The utility model relates to the technical field of magnetohydrodynamic propellers, and provides a magnetohydrodynamic propeller experiment device, which comprises a magnetic field generation assembly and a driving assembly, the driving assembly comprises a first driving piece and a second driving piece, the second driving piece is sleeved outside the first driving piece, a gap is arranged between the first driving piece and the second driving piece, and the magnetic field generation assembly is connected with the magnetic field generation assembly. The plurality of magnetic field generation assemblies are uniformly arranged in the gap in the circumferential direction and are used for generating a magnetic field surrounding the first driving part and the second driving part in the circumferential direction; wherein one of the first driving piece and the second driving piece is electrified positively, the other one is electrified negatively, and under the condition that the driving assemblies are electrified, the current and the magnetic fields act together, so that water flow passes through the space between the two adjacent magnetic field generating assemblies from the gap in the axial direction of the driving assemblies. The water flow generates counter-acting force on the magnetofluid propellers and the ship body under the action of Lorentz force to move in the opposite direction, and pushing of the ship body is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of magnetohydrodynamic thrusters, and particularly relates to an experimental device for a magnetohydrodynamic thruster. Background Art

[0002] At present, a magnetohydrodynamic thruster generates thrust by using a magnetic field and an electric current to accelerate and eject seawater, thereby driving a submarine forward. Compared with traditional mechanical rotation type thrusters, a magnetohydrodynamic thruster does not need to be equipped with components such as propeller blades, gear transmission mechanisms, and shaft pumps, which makes the entire propulsion system more concise and efficient. Since there is no mechanical rotation during the operation of the magnetohydrodynamic thruster, it fundamentally eliminates the vibration and noise generated by mechanical rotation. This means that the submarine can maintain an extremely low noise level during navigation, greatly improving the stealth and survival ability of the submarine. However, the volume of a magnetohydrodynamic thruster is generally relatively large, which is not convenient for studying its working principle and operation mode, and the principle is not intuitive and obvious enough.

[0003] The utility model designs an experimental device for a magnetohydrodynamic thruster to solve the above technical problems. Content of the Utility Model

[0004] The utility model provides an experimental device for a magnetohydrodynamic thruster to facilitate the intuitive study of the working principle and operation mode of the magnetohydrodynamic thruster.

[0005] To achieve the above object, the utility model provides the following technical solution: An experimental device for a magnetohydrodynamic thruster includes a magnetic field generating assembly and a driving assembly. The driving assembly includes a first driving member and a second driving member. The second driving member is sleeved outside the first driving member, and there is a gap between the first driving member and the second driving member. The number of the magnetic field generating assemblies is multiple, and the multiple magnetic field generating assemblies are circumferentially and evenly arranged in the gap for generating a magnetic field that circumferentially surrounds the first driving member and the second driving member. Wherein, one of the first driving member and the second driving member is connected to positive electricity, and the other is connected to negative electricity. When the driving assembly is powered on, the electric current and the magnetic field act together to enable water flow to pass through from the gap between two adjacent magnetic field generating assemblies along the axial direction of the driving assembly.

[0006] Based on the above technical solution, the magnetic field generating assembly includes a magnet and a non-magnetic housing, and the non-magnetic housing covers the magnet.

[0007] Based on the above technical solution, the magnetic field generating assembly further includes an extension portion. The extension portion is arranged at the end of the second driving member, connected to the non-magnetic housing on one side, and extends in a direction away from the second driving member on the other side.

[0008] Optionally, the first driving member and the second driving member are cylindrical.

[0009] Based on the above technical solution, the experimental device of the magnetohydrodynamic thruster further includes a flow guide member, which is arranged at the end of the first driving member and is used to guide the water flow in and out of the gap.

[0010] Based on the above technical solution, the flow guide member is provided with a guiding inclined surface, which is inclined from one end of the flow guide member close to the first driving member to the other end along the direction close to the center of the flow guide member.

[0011] Based on the above technical solution, the experimental device of the magnetohydrodynamic thruster further includes a water tank and a base. The base is fixed in the water tank, and the driving assembly is supported by the base.

[0012] Based on the above technical solution, the experimental device of the magnetohydrodynamic thruster further includes a controller, a first connecting wire and a second connecting wire. Both the first connecting wire and the second connecting wire are connected to the controller. One of the first driving member and the second driving member is connected to the first connecting wire, and the other is connected to the second connecting wire, which is used to control the opening and closing of the driving assembly and adjust the voltage applied to the driving assembly.

[0013] Compared with the related art, the beneficial effects of the present utility model are as follows:

[0014] By providing a first driving member and a second driving member sleeved with each other, the magnetic field generating assembly is arranged between the first driving member and the second driving member. When the driving assembly is energized, a magnetic field and an electric field perpendicular to each other are generated simultaneously. According to the left-hand rule, with the magnetic field lines passing through the palm, the four fingers pointing in the direction of the current, the direction pointed by the thumb is the direction of the Lorentz force received by the conductor. At this time, the energized water flow is the conductor, and under the action of the Lorentz force, it passes through the gap along the axial direction of the driving assembly, forming a jet phenomenon, generating a reaction force on the magnetohydrodynamic thruster and the hull, so that the relative hull moves in the opposite direction, realizing the propulsion of the hull. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only one embodiment of the present utility model. For those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained according to the provided drawings.

[0016] Figure 1 is a schematic structural diagram of an experimental device of a magnetohydrodynamic thruster provided by the present utility model;

[0017] Figure 2 is a schematic structural diagram of an experimental device of a magnetohydrodynamic thruster provided by the present utility model with the driving mechanism and the magnet removed.

[0018] In the figure: 1. Magnetic field generating component; 12. Non-magnetic housing; 13. Extension part; 2. Driving component; 21. First driving part; 22. Second driving part; 3. Flow guiding part; 31. Guiding inclined surface. Detailed implementation mode

[0019] The present utility model will be further described below in conjunction with the accompanying drawings and examples:

[0020] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" 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 direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0023] Combined with Figure 1 and Figure 2 As shown, the present disclosure embodiment provides a magnetohydrodynamic thruster experimental device, including a magnetic field generating component 1 and a driving component 2. The driving component 2 includes a first driving part 21 and a second driving part 22. The second driving part 22 is sleeved outside the first driving part 21, and there is a gap between the first driving part 21 and the second driving part 22. The number of the magnetic field generating components 1 is multiple, and the multiple magnetic field generating components 1 are circumferentially and evenly arranged in the gap for generating a magnetic field that circumferentially surrounds the first driving part 21 and the second driving part 22. Among them, one of the first driving part 21 and the second driving part 22 is energized with positive electricity, and the other is energized with negative electricity. When the driving component 2 is energized, the current and the magnetic field act together to make the water flow through from the gap between two adjacent magnetic field generating components 1 along the axial direction of the driving component 2.

[0024] Using the experimental device of the magnetohydrodynamic thruster provided by the embodiments of the present disclosure, by arranging a first driving member 21 and a second driving member 22 sleeved with each other, the magnetic field generating assembly 1 is arranged between the first driving member 21 and the second driving member 22, and the driving assembly 2 is energized to generate a magnetic field and an electric field perpendicular to each other at the same time. According to the left-hand rule, the magnetic field lines pass through the palm, the four fingers point to the current direction, and the direction pointed by the thumb is the direction of the Lorentz force received by the conductor. At this time, the energized water flow is the conductor and passes through the gap along the axial direction of the driving assembly 2 under the action of the Lorentz force, forming a jet phenomenon, generating a reaction force on the magnetohydrodynamic thruster and the hull, causing the relative hull to move in the opposite direction and realizing the propulsion of the hull.

[0025] Specifically, in this application, the second driving member 22 is energized with positive electricity and the first driving member 21 is energized with negative electricity as an example. At this time, the current direction is from the second driving member 22 to the first driving member 21.

[0026] Based on the above technical solution, as Figure 1 and Figure 2 shown, the magnetic field generating assembly 1 includes a magnet and a non-magnetic housing 12, and the non-magnetic housing 12 covers the magnet.

[0027] The function of the magnet is to generate a magnetic field. A plurality of magnetic field generating assemblies 1 are circumferentially and uniformly arranged in the gap, that is, a plurality of magnets are circumferentially and uniformly arranged between the first driving member 21 and the second driving member 22, and can generate a magnetic field that circumferentially surrounds the first driving member 21 and the second driving member 22. The non-magnetic housing 12 covering the magnet plays a role in protecting and supporting the magnet, avoiding certain damage to the magnet when the magnetohydrodynamic thruster passes through water for a long time.

[0028] Specifically, the magnet can be a permanent magnet or an electromagnet. The non-magnetic housing 12 is made of a non-magnetic material, which can be a stainless steel material or a plastic material. The non-magnetic material can avoid the non-magnetic housing 12 affecting the magnetic field generated by the magnet, so as to avoid affecting the direction of the Lorentz force received by the water flow.

[0029] Based on the above technical solution, as Figure 2 shown, the magnetic field generating assembly 1 further includes an extension portion 13. The extension portion 13 is arranged at the end of the second driving member 22, connected to the non-magnetic housing 12 on one side, and extends in a direction away from the second driving member 22 on the other side.

[0030] The setting of the extension portion 13 can play a role in protecting and supporting the non-magnetic housing 12, and indirectly play a role in protecting and supporting the magnet to a certain extent, and jointly play a better effect with the non-magnetic housing 12.

[0031] Optionally, as Figure 1As shown, the first driving member 21 and the second driving member 22 are cylindrical.

[0032] Based on the above technical solution, the experimental device of the magnetohydrodynamic thruster further includes a flow guide member 3, which is arranged at the end of the first driving member 21 and is used to guide the water flow in and out of the gap.

[0033] Specifically, the flow guide member 3 can be arranged at one end of the first driving member 21, or can be arranged at both ends of the first driving member 21 at the same time. In this application, the case where the flow guide member 3 is arranged at both ends of the first driving member 21 is taken as an example. The arrangement of the flow guide member 3 can play a role in guiding the water flow in and out of the gap between the first driving member 21 and the second driving member 22, facilitating the water flow to enter and exit the gap more smoothly, and avoiding the consumption of energy.

[0034] Based on the above technical solution, as Figure 1 and Figure 2 shown, the flow guide member 3 is provided with a guiding inclined surface 31, and the guiding inclined surface 31 is inclined from the end of the flow guide member 3 close to the first driving member 21 to the other end in the direction close to the center of the flow guide member 3.

[0035] Specifically, the flow guide member 3 is in a conical shape or a shape similar to a conical shape. The bottom surface of the conical flow guide member 3 is connected to the first driving member 21, and the vertex extends in the axial direction of the first driving member 21 away from the first driving member 21, which can better guide the water flow in and out of the gap, reduce the resistance of the water flow entering the gap to a certain extent, improve the working state of the magnetohydrodynamic thruster underwater, reduce turbulence, and improve the utilization rate of the thrust generated by the Lorentz force.

[0036] Based on the above technical solution, the experimental device of the magnetohydrodynamic thruster further includes a water tank and a base. The base is fixed in the water tank, and the driving assembly 2 is supported by the base.

[0037] The base can fix the magnetohydrodynamic thruster in the water tank, so as to facilitate subsequent magnetic field strength tests, fluid property tests, thrust tests, etc. The role of the water tank is to provide a working environment for the magnetohydrodynamic thruster, and the role of the base is to fix the magnetohydrodynamic thruster and assist in subsequent tests, which can improve the accuracy of the tests to a certain extent.

[0038] Based on the above technical solution, the experimental device of the magnetohydrodynamic thruster further includes a controller, a first connecting wire and a second connecting wire. Both the first connecting wire and the second connecting wire are connected to the controller. One of the first driving member 21 and the second driving member 22 is connected to the first connecting wire, and the other is connected to the second connecting wire, which is used to control the opening and closing of the driving assembly 2 and adjust the voltage applied to the driving assembly 2.

[0039] The controller serves as the power supply for the driving assembly 2. The positive pole of the power supply is connected to the second driving member 22, and the negative pole of the power supply is connected to the first driving member 21. It can control the opening and closing of the driving assembly 2, supply power to the driving assembly 2 through the first connecting wire and the second connecting wire, and change the power of the power supply by adjusting the output voltage of the controller, so as to achieve the magnitude of the Lorentz force, that is, the thrust generated by the magnetohydrodynamic thruster.

[0040] The above has described the present utility model by way of example, but the present utility model is not limited to the above specific embodiments. Any modification or variation based on the present utility model falls within the scope of protection required by the present utility model.

Claims

1. A magnetic fluid propulsion experimental device, characterized in that: It comprises a magnetic field generating component and a driving component, wherein the driving component comprises a first driving member and a second driving member, wherein the second driving member is sleeved on the outside of the first driving member, and there is a gap between the first driving member and the second driving member, and the number of the magnetic field generating components is multiple, and the multiple magnetic field generating components are evenly arranged in the gap in a circumferential direction, so as to generate a magnetic field circumferentially surrounding the first driving member and the second driving member; wherein one of the first driving member and the second driving member is positively charged, and the other is negatively charged, and when the driving component is energized, the current and the magnetic field work together to make the water flow pass through the gap between the two adjacent magnetic field generating components along the axial direction of the driving component.

2. The magnetic fluid propulsion device according to claim 1, characterized in that: The magnetic field generating assembly includes a magnet and a non-magnetic shell, wherein the non-magnetic shell covers the magnet.

3. The magnetic fluid propulsion device according to claim 2, characterized in that: The magnetic field generating assembly further comprises an extension portion, which is arranged at the end of the second driving member, one side of which is connected to the non-magnetic shell, and the other side of which extends in a direction away from the second driving member.

4. The magnetic fluid propulsion device according to claim 1, characterized in that: The first driving member and the second driving member are cylindrical.

5. The magnetic fluid propulsion device according to any one of claims 1 to 4, characterized in that: It also includes a flow guide, which is arranged at the end of the first driving member and is used to guide water flow in and out of the gap.

6. The magnetic fluid propulsion device according to claim 5, characterized in that: The guide member is provided with a guide slope, and the guide slope is inclined from one end of the guide member close to the first driving member to the other end along a direction close to the center of the guide member.

7. The magnetic fluid propulsion device according to any one of claims 1 to 4, characterized in that: It also includes a water tank and a base, wherein the base is fixed in the water tank, and the driving assembly is supported on the base.

8. The magnetic fluid propulsion device according to any one of claims 1 to 4, characterized in that: It also includes a controller, a first connecting line and a second connecting line, wherein the first connecting line and the second connecting line are both connected to the controller, one of the first driving member and the second driving member is connected to the first connecting line, and the other is connected to the second connecting line, for controlling the opening and closing of the driving component and adjusting the voltage passed into the driving component.

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