Magnetic field control self-enhancement type electromagnetic emission device and method based on armature line guidance

Abstract

A magnetic field control self-enhancement type electromagnetic emission device based on armature line guidance comprises a magnetic field enhancement module, a track module and an armature module, and the magnetic field enhancement module is arranged on the armature module and comprises a plurality of magnetic field enhancement units at specific intervals; the track module comprises two tracks which are arranged in a space in parallel; the armature module can move along the track direction. According to the device, the self-enhancement type electromagnetic emission device is controlled by the magnetic field guided by armature lines, in the moving process of the armature, the magnetic field enhancement unit on the armature plays a role in guiding the flow direction of current and increasing the density of current flowing through the armature, self-enhancement regulation and control of the magnetic field are achieved, the problem of non-uniform magnetic force distribution is solved, and therefore the Lorentz force borne by the armature is increased; the propelling efficiency is improved; meanwhile, good electric contact is achieved, contact pressure of the pivot rail is increased, contact resistance is reduced, and heat generated by the contact face of the pivot rail is reduced.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic emission, and in particular to a magnetic field controlled self-enhanced electromagnetic emission device and method based on armature pattern guidance. Background Art

[0002] Electromagnetic launch technology is a technology that uses electromagnetic force to accelerate an object to a very high speed. It has a simple principle, strong operability, and an energy conversion efficiency of 50%. Based on the many advantages of electromagnetic launch technology, its research has great significance and application in both military and civilian fields, such as electromagnetic weapons, electromagnetic catapults, etc. The electromagnetic launch device consists of a launch circuit composed of a track and an armature, and a pulse power supply is used as a launch power supply to achieve the propulsion effect. Under the action of the magnetic field generated by the pulse current, the armature moves along the track with the Lorentz force as the propulsion force. However, during the entire launch process, the track is in close contact with the armature and the skin effect causes uneven current distribution, which makes the track temperature very high and causes ablation problems; in addition, the induced magnetic field generated by the pulse current is spiral, which is manifested as uneven distribution of the armature magnetic field, resulting in uneven thrust. At the same time, the armature speed is low in the initial stage of the launch process, which will affect the effectiveness of the final propulsion.

[0003] The existing electromagnetic track optimization design schemes mainly include increasing the peak value of the pulse current source, increasing the number of tracks, and placing coils externally. However, there are also the following problems: (1) Increasing the peak value of the pulse current requires a larger volume and more complex power supply structure, and increases the heat accumulation during the launch process, accompanied by serious ablation problems. (2) The use of external equipment to enhance the propulsion efficiency increases the complexity of the overall device, reduces the reliability of the equipment in the pulsed strong magnetic environment, and increases the probability of failure. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a magnetic field controlled self-enhanced electromagnetic launch device solution based on armature pattern guidance, and the armature pattern guidance is realized by the magnetic field enhancement unit on the armature. During the movement of the armature, the magnetic field enhancement unit on the armature plays a role in guiding the flow of current, increasing the current density flowing through the armature, realizing self-enhancement control of the magnetic field, optimizing the uneven distribution of magnetic force, thereby increasing the Lorentz force on the armature, improving the propulsion efficiency, and achieving good electrical contact, increasing the contact pressure of the armature and rail, reducing the contact resistance, and reducing the heat generation of the contact surface of the armature and rail.

[0005] The present invention adopts the following technical solution.

[0006] The magnetic field controlled self-enhanced electromagnetic launch device based on armature pattern guidance includes a magnetic field enhancement module, a track module and an armature module, and is characterized in that: The magnetic field enhancement module is arranged on the armature module, the track module comprises two tracks placed in parallel in a space, and the armature module is arranged between the tracks.

[0007] Furthermore, the magnetic field enhancement module is provided with a plurality of groups of magnetic field enhancement units on the armature module and evenly distributed on the surface of the armature to guide the flow of current.

[0008] Furthermore, the magnetic field enhancement unit includes groove patterns.

[0009] Furthermore, the shapes of the lines of the magnetic field enhancement unit include rectangular, pointed and circular, and the number of lines includes 1, 2 or 3.

[0010] Furthermore, the track shape includes a flat type, a convex type, and a concave type.

[0011] Further, the rail is made of a metal material including copper or copper-chromium alloy.

[0012] Furthermore, the shape of the armature module includes a planar rectangle, a convex rectangle, and a concave rectangle.

[0013] Further, the material of the armature module includes aluminum.

[0014] The method for self-enhanced electromagnetic emission based on magnetic field control guided by armature lines comprises the following steps: Step 1, connecting the device to a pulse current source to provide power for the magnetic field controlled self-enhanced electromagnetic launch device; Step 2, the current passes through the magnetic field enhancement module in the armature arm area, guiding the current to flow into the armature arm area, increasing the armature-rail contact pressure, reducing the contact resistance, and reducing the heat generation of the armature-rail contact surface; Step 3, the current passes through the magnetic field enhancement module on the armature throat to guide the current flow, increase the current density at the armature throat, and improve the propulsion efficiency; Step 4: The Lorentz force is generated under the action of the magnetic field to push the armature to move along the track direction.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a magnetic field-controlled self-enhanced electromagnetic launch device based on armature pattern guidance. A magnetic field enhancement module is arranged on the armature module to realize armature pattern guidance. The armature pattern guides the current flow direction, increases the armature current density, and thus increases the Lorentz force on the armature, thereby optimizing the propulsion efficiency; secondly, the magnetic field enhancement unit can reduce the influence of the skin effect and optimize the problem of uneven magnetic force distribution. Compared with traditional electromagnetic launch devices, when the same launch speed is achieved, the required pulse current peak is reduced, achieving efficient energy utilization, while achieving good electrical contact, reducing contact resistance, reducing heat generation at the armature-rail contact surface, and to a certain extent alleviates the ablation problem, extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic structural diagram of a magnetically controlled self-enhanced electromagnetic launch device based on armature pattern guidance provided by the present invention; FIG2 is a schematic diagram of the armature structure of a magnetically controlled self-enhanced electromagnetic launch device based on armature texture guidance provided by the present invention; FIG3 is a flow chart of electromagnetic launch of a magnetically controlled self-enhanced electromagnetic launch method based on armature texture guidance provided by the present invention; In the figure: 11-track module; 12-magnetic field enhancement module; 13-armature module. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0018] Figure 1 It is a structural schematic diagram of a magnetically controlled self-enhanced electromagnetic launch device based on armature pattern guidance.

[0019] like Figure 1 As shown, this embodiment proposes a magnetic field controlled self-enhanced electromagnetic launch device based on armature pattern guidance, including a track module 11, a magnetic field enhancement module 12 and an armature module 13.

[0020] The track module 11 includes two parallel tracks in space. The track shapes include flat, convex and concave; the track is made of metal materials, specifically copper, copper-chromium alloy and other metals with good electrical conductivity; the track module determines the direction of armature movement, generates a magnetic field through a pulse current source and forms a transmitting circuit with the armature.

[0021] The magnetic field enhancement module 12 includes a plurality of groups of magnetic field enhancement units arranged on the armature module 13 and evenly distributed on the surface of the armature; the magnetic field enhancement module 12 includes groove patterns, which are symmetrically distributed on the armature, and the corresponding Lorentz force enhancement positions are also symmetrically distributed; the patterns include rectangular, pointed and circular shapes, and the number of patterns includes 1, 2 or 3.

[0022] The shape of the armature module 13 can be placed between the rails, matching the shape of the rails, and meeting the propulsion requirements, including but not limited to a flat rectangle, a convex rectangle, and a concave rectangle; the armature module material includes aluminum; the armature module moves along the rail direction and forms a loop with the rail.

[0023] Figure 2 This is a schematic diagram of the armature structure of a magnetically controlled self-enhanced electromagnetic launch device based on armature pattern guidance.

[0024] Armature Figure 2 As shown, it can be divided into the throat, shoulder and armature arm parts; the armature lines are symmetrically distributed on the armature, and the number of lines is mainly reflected in the armature arm part.

[0025] In specific implementation, the upper surface of the armature is arranged with patterns of the same shape and depth and symmetrical left and right, and the specific positions are as follows Figure 2 The armature pattern guides the current flow, so that the current is concentrated in the armature throat and arm position, increasing the armature current density and thus increasing the Lorentz force on the armature; at the same time, it increases the armature-rail contact pressure, so that the armature-rail achieves good electrical contact, reduces the contact resistance, and thus reduces the generation of Joule heat.

[0026] Figure 3 It is a flow chart of a magnetic field controlled self-enhanced electromagnetic launch method based on armature pattern guidance.

[0027] When the pulse current is connected to the track, the two and the armature form a launch circuit. After the power is turned on, the track generates a strong magnetic field. Under the action of the magnetic field, the armature module is acted upon by the Lorentz force and is launched forward along the track. During the launch process, the current is guided by the armature lines and first concentrated at the armature arm position, increasing the armature-rail contact pressure, enabling the armature-rail to achieve good electrical contact, reducing contact resistance, and reducing heat generation at the armature-rail contact surface; secondly, it is concentrated at the armature throat position, increasing the armature current density and improving the armature propulsion efficiency.

[0028] according to Figure 3 , a magnetic field-controlled self-enhanced electromagnetic launch method guided by armature patterns, comprising the following steps: Step 1, connecting the device to a pulse current source to provide power for the magnetic field controlled self-enhanced electromagnetic launch device; Step 2, the current passes through the magnetic field enhancement module in the armature arm area, guiding the current to flow into the armature arm area, increasing the armature-rail contact pressure, reducing the contact resistance, and reducing the heat generation of the armature-rail contact surface; Step 3, the current passes through the magnetic field enhancement module on the armature throat to guide the current flow, increase the current density at the armature throat, and improve the propulsion efficiency; Step 4: The Lorentz force is generated under the action of the magnetic field to push the armature to move along the track direction.

[0029] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes a magnetic field-controlled self-enhanced electromagnetic launch device based on armature pattern guidance. A magnetic field enhancement module is arranged on the armature module to realize armature pattern guidance. The armature pattern guides the current flow direction, increases the armature current density, and thus increases the Lorentz force on the armature, thereby optimizing the propulsion efficiency; secondly, the magnetic field enhancement unit can reduce the influence of the skin effect and optimize the problem of uneven magnetic force distribution. Compared with traditional electromagnetic launch devices, when the same launch speed is achieved, the required pulse current peak is reduced, achieving efficient energy utilization, while achieving good electrical contact, reducing contact resistance, reducing heat generation at the armature-rail contact surface, and to a certain extent alleviates the ablation problem, extending the service life of the device.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A magnetic field-controlled self-enhanced electromagnetic launch device based on armature pattern guidance, comprising a magnetic field enhancement module (12), a track module (11) and an armature module (13), characterized in that: The magnetic field enhancement module (12) is arranged on the armature module (13); the track module (11) comprises two tracks placed in parallel in a space; and the armature module (13) is arranged between the tracks.

2. According to claim 1, the magnetic field controlled self-enhanced electromagnetic launch device based on armature pattern guidance is characterized in that: The magnetic field enhancement module (12) is provided with a plurality of groups of magnetic field enhancement units on the armature module (13) and is evenly distributed on the surface of the armature, which guides the flow of current and increases the current density flowing through the armature, while realizing self-enhancement control of the magnetic field, increasing the current density on the contact surface of the armature track, and optimizing the uneven distribution of magnetic force, thereby increasing the Lorentz force on the armature arm and improving the contact pressure and propulsion efficiency.

3. According to claim 2, the magnetic field controlled self-enhanced electromagnetic launch device based on armature pattern guidance is characterized in that: The magnetic field enhancement unit includes groove patterns.

4. The magnetic field controlled self-enhanced electromagnetic launch device based on armature pattern guidance according to claim 3, characterized in that: The shapes of the magnetic field enhancement unit lines include rectangular, pointed and circular, and the number of lines includes 1, 2 or 3.

5. The magnetic field controlled self-enhanced electromagnetic launch device based on armature pattern guidance according to claim 1, characterized in that: Track shapes include flat, convex and concave.

6. The magnetic field controlled self-enhanced electromagnetic launch device based on armature pattern guidance according to claim 5, characterized in that: The rails are made of metal materials including copper or copper-chromium alloy.

7. The magnetic field controlled self-enhanced electromagnetic launch device based on armature pattern guidance according to claim 1, characterized in that: The shape of the armature module (13) includes a flat rectangle, a convex rectangle, and a concave rectangle, and the material includes aluminum.

8. A magnetic field-controlled self-enhanced electromagnetic launch method based on armature pattern guidance, characterized in that: The following steps are involved: Step 1, connecting the device to a pulse current source to provide power for the magnetic field controlled self-enhanced electromagnetic launch device; Step 2, the current passes through the magnetic field enhancement module in the armature arm area, guiding the current to flow into the armature arm area, increasing the armature-rail contact pressure, reducing the contact resistance, and reducing the heat generation of the armature-rail contact surface; Step 3, the current passes through the magnetic field enhancement module on the armature throat to guide the current flow, increase the current density at the armature throat, and improve the propulsion efficiency; Step 4: The Lorentz force is generated under the action of the magnetic field to push the armature to move along the track direction.

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