Graphene coating H-shaped armature of electromagnetic rail gun

Abstract

The invention discloses an H-shaped armature of an electromagnetic rail gun, and belongs to the technical field of electromagnetic emission. The wind power generation device comprises a windward front surface, a windward curved surface, a windward inner surface, a top surface, a bottom surface, side surfaces, a leeward front surface, a leeward curved surface and a leeward inner surface, the graphene film is characterized in that both the top surface and the bottom surface are coated with graphene. According to the invention, the stability in electromagnetic emission is better, the emission efficiency can be effectively improved, and the graphene coating is coated on the surface of the armature in combination with the shape, so that the armature can reach a higher average speed and has a better arc ablation resistance effect, and the armature also has a certain lubrication effect; the conductive filler can be used as a good interface conductive filler to improve the contact state of a pivot rail interface. Therefore, the problems of'planing ', 'ablation', 'adhesion ', 'transition' and the like in the electromagnetic gun launching process are further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electromagnetic launch and relates to a graphene-coated H-shaped armature of an electromagnetic railgun. Background Art

[0002] Electromagnetic launch technology represents a revolution in launch methods, following mechanical and chemical energy launches. It utilizes electromagnetic force to propel objects to high or ultra-high speeds. By converting electromagnetic energy into the instantaneous kinetic energy required for launching a payload, it can accelerate payloads weighing from grams to tens of tons to high speeds over short distances. This technology surpasses the speed and energy limits of traditional launch methods and is an inevitable path for future launch methods. It also offers advantages such as fast response, stable launch performance, and controllable thrust.

[0003] The armature is fixed or stuffed into the rail, and slides at ultra-high speeds in high-current, strong magnetic fields. This inevitably leads to rail gouging, grooves, armature melting, and armature transition damage. Therefore, how to minimize damage to the armature rail material by combining armature shape modification with armature coatings is a pressing technical challenge facing those skilled in the art. Summary of the Invention

[0004] The purpose of the present invention is to provide an electromagnetic railgun graphene-coated H-shaped armature, with the goal of building an electromagnetic railgun with better stability during launch. The graphene coating can be used to reduce the sliding friction coefficient between the armature and the rail, thereby further improving the problems of "planing", "ablation", "sticking", and "transition" during the launch of the electromagnetic gun.

[0005] The technical solution of the present invention is as follows: an electromagnetic railgun graphene-coated H-shaped armature, the armature comprising a windward front surface, a windward curved surface, a windward inner surface, a top surface, a bottom surface, a side surface, a leeward front surface, a leeward curved surface, and a leeward inner surface; the above-mentioned characteristics are that the windward inner surface and the leeward inner surface are both concave inward; the windward curved surface and the leeward curved surface both have an arc transition; the side surface of the armature is H-shaped, and the ratio of the side length to height is 3:2; and the above-mentioned top surface and bottom surface are both coated with a graphene coating.

[0006] A further technical solution is that both the windward inner surface and the leeward inner surface are concave inwardly with a length of 1:3.

[0007] A further technical solution is that the arc radius of the windward curved surface and the leeward curved surface is 1 mm.

[0008] A further technical solution is that the armature side length is 24 mm and the height is 16 mm.

[0009] Graphene coating can be applied by utilizing the principle of electrostatic spraying. Under the action of high voltage, an electrostatic field is formed between the nozzle and the grounded sprayed part. The graphene dispersion is sprayed onto the armature surface under the high voltage of the electrostatic field. As the solvent evaporates, the graphene particles are deposited on the armature surface to form a uniform coating.

[0010] The graphene dispersion is obtained by dissolving graphene powder with a purity of 80% in anhydrous ethanol, adding a small amount of surfactant, and finally dispersing it through an ultrasonic disperser.

[0011] Compared with the prior art, the present invention has the following advantages: by designing an H-shaped armature with better stability, the launch efficiency can be effectively improved, and the armature of this shape is coated with graphene on its surface, so that it can achieve a higher average speed and have better resistance to arc erosion. It also has a certain lubricating effect and can serve as a good interface conductive filler to improve the contact state of the armature-rail interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0013] Figure 2 This is a schematic diagram of the main view of the windward side of the three-dimensional structure of the present invention;

[0014] Figure 3 This is a schematic side view of the three-dimensional structure of the present invention;

[0015] In the figure: 1. Windward front surface 2. Windward curved surface 3. Windward inner surface 4. Top surface 5. Side surface 6. Leeward curved surface 7. Leeward front surface 8. Leeward inner surface 9. Bottom surface DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and Examples:

[0017] Based on existing electromagnetic railgun armatures, the present invention designs and manufactures an H-shaped armature with a graphene coating. This armature offers improved firing stability, and the graphene coating provides lubrication, acting as a conductive filler to improve the contact between the armature and rail, enabling higher average velocities and better resistance to arc erosion. This further mitigates issues such as gouging, erosion, sticking, and transitions during electromagnetic railgun firing.

[0018] Specifically, as shown in the figure, the present invention discloses an electromagnetic railgun graphene-coated H-shaped armature, which includes a windward front face 1, a windward curved surface 2, a windward inner surface 3, a top surface 4, a side surface 5, a leeward curved surface 6, a leeward front face 7, a leeward inner surface 8, and a bottom surface 9; characterized in that the windward front face 1 and the top surface 4 and the bottom surface 9, the leeward front face 7 and the top surface 4 and the bottom surface 9, the windward inner surface 3, and the leeward inner surface 8 all have arc transitions, and the top surface 4 and the bottom surface 9 are both coated with a graphene coating.

[0019] A further preferred embodiment of the present invention is that the armature has a length m of 24 mm, a width n of 10 mm, and a height h of 8 mm; the windward front 1, the leeward front 7, the top surface 4, the bottom surface 9, and the side 5 are all planes; the windward front 1 and the top surface 4 and the bottom surface 9, and the leeward front 7 and the top surface 4 and the bottom surface 9 are composed of an intermediate arc transition, and the transition arc radius is 1 mm; the plane one transition arc radius of the upper and lower arc transitions of the windward inner surface 3 is 3 mm; the plane two transition arc radius of the upper and lower arc transitions of the leeward inner surface 8 is 4.5 mm.

[0020] A further preferred embodiment of the present invention is that the windward inner surface and the leeward inner surface are both concave inwardly with a length of 1:3.

[0021] A further preferred embodiment of the present invention is that the side surface of the armature is H-shaped, and the ratio of the side length to height is 3:2.

[0022] A further preferred embodiment of the present invention is to dissolve 10 mg of graphene powder with a purity of 80% (6 to 10 layers, a flake size of 8 to 13 μm, and an average flake thickness of 2 nm) in 20 ml of anhydrous ethanol, and add 3 ml of a surfactant having a concentration of 0.1% to 5% sodium dodecyl sulfate.

[0023] A further preferred embodiment of the present invention is to use a KB-500DB ultrasonic disperser (rotation speed of 10,000 r / min, frequency of 50 Hz) for ultrasonic dispersion for 6 hours, stirring every 30 minutes; at the same time, to achieve a better dispersion effect, the water in the cleaning tank is replaced every 2 hours, and the water level before and after is kept the same, to finally obtain a graphene dispersion liquid.

[0024] A further preferred embodiment of the present invention utilizes the principle of electrostatic spraying, using a high-voltage power supply of 50 kV and a syringe with a liquid supply pressure of 0.3 MPa. Under the action of high voltage, an electrostatic field is formed between the nozzle and the grounded sprayed part. Spraying is performed at an injection rate of 20 mL per second. The graphene dispersion is sprayed onto the armature surface under the high pressure of the electrostatic field. As the solvent evaporates, the graphene particles are deposited on the armature surface to form a uniform coating.

[0025] Compared with the prior art, the technical solution provided by this embodiment has at least one of the following beneficial effects:

[0026] 1. The transmitting armature of the present invention is an H-shaped structure armature, which has strong transmitting stability and directionality, and greatly improves the transmitting efficiency.

[0027] 2. The transmitting armature of the present invention is coated with a graphene coating, which has good resistance to arc erosion and a certain lubricating effect, and can serve as a good interface conductive filler to improve the contact state of the armature-rail interface.

[0028] Matters not covered by this invention are known in the art. The above embodiments are intended only to illustrate the technical concepts and features of this invention. Their purpose is to enable those skilled in the art to understand the contents of this invention and implement them accordingly. They are not intended to limit the scope of protection of this invention. Any equivalent changes or modifications made in accordance with the spirit and essence of this invention are intended to be covered by the scope of protection of this invention.

Claims

1. An electromagnetic railgun graphene-coated H-shaped armature, comprising a windward front surface, a windward curved surface, a windward inner surface, a top surface, a bottom surface, side surfaces, a leeward front surface, a leeward curved surface, and a leeward inner surface; the windward inner surface and the leeward inner surface are both concavely curved inwardly; the windward curved surface and the leeward curved surface both have arc transitions; the armature side surfaces are H-shaped, with a side length-to-height ratio of 3:2; and the top and bottom surfaces are both coated with a graphene coating.

2. The electromagnetic railgun graphene-coated H-shaped armature according to claim 1, characterized in that: The windward inner surface and the leeward inner surface are both concave inwards with a length of 1:

3.

3. The electromagnetic railgun graphene-coated H-shaped armature according to claim 1, characterized in that: The arc radius of the windward curved surface and the leeward curved surface is 1 mm.

4. The electromagnetic railgun graphene-coated H-shaped armature according to claim 1, characterized in that: The armature side length is 24mm and the height is 16mm.

5. The electromagnetic railgun graphene-coated H-shaped armature according to claim 1, characterized in that: The inner arc transition radii of the windward inner surface and the leeward inner surface are 3mm and 4.5mm respectively.

6. The electromagnetic railgun graphene-coated H-shaped armature according to claim 1, characterized in that: Graphene coating can be applied by utilizing the principle of electrostatic spraying. Under the action of high voltage, an electrostatic field is formed between the nozzle and the grounded sprayed part. The graphene dispersion is sprayed onto the armature surface under the high voltage of the electrostatic field. As the solvent evaporates, the graphene particles are deposited on the armature surface to form a uniform coating.

7. The electromagnetic railgun graphene-coated H-shaped armature according to claim 6, characterized in that: The graphene dispersion is obtained by dissolving graphene powder with a purity of 80% in anhydrous ethanol, adding a small amount of surfactant, and finally dispersing it through an ultrasonic disperser.

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