CN109443085B - An electromagnetic railgun C-type armature - Google Patents

Abstract

The invention discloses an electromagnetic track gun C-shaped armature, and belongs to the technical field of electromagnetic emission. The invention comprises a windward side, a top surface, a bottom surface, a side surface A, a side surface B, a leeward side and an inner surface; the leeward surface is in circular arc transition with the top surface, the bottom surface and the inner surface respectively; the windward side is in arc transition with the top surface and the bottom surface respectively, and bionic shark skin drag reduction surfaces are uniformly distributed on the three sides; the bionic shark skin drag reduction surface is provided with a plurality of rows of grooves which are consistent with the track trend, and the depths of the grooves are the same; the side surface A and the side surface B are uniformly provided with bionic super-hydrophobic drag reduction surfaces; the bionic superhydrophobic drag reduction surface is a plurality of rows of protrusions with the trend perpendicular to the track trend, and the protruding surface is a part of a sphere. The invention can effectively reduce the air resistance in the armature flight process, ensure the stability of the armature flight attitude, and simultaneously improve the shooting precision and the shooting range of the electromagnetic track gun.

Description

An electromagnetic railgun C-type armature

Technical field

The invention belongs to the technical field of electromagnetic launch and relates to a C-type armature of an electromagnetic rail gun.

Background technique

The electromagnetic railgun is a new type of launch device that uses electromagnetic force to drive the armature and convert electromagnetic energy into mechanical energy. Compared with weapons that use chemical energy as launch energy, electromagnetic railguns use electromagnetic energy as launch energy, which can give the armature higher speed and greater kinetic energy. However, due to the particular shape of the armature, it encounters large air resistance after being launched out of the chamber. At the same time, due to the superposition of its own gravity, it will swing and flip during flight, thus reducing the flight stability of the armature. performance and shooting accuracy. Therefore, how to reduce the air resistance experienced by the armature is a technical problem that needs to be solved by those skilled in the art.

Contents of the invention

The invention provides a C-type armature of an electromagnetic rail gun, which aims to effectively reduce the air resistance during flight after the armature of the electromagnetic rail gun is launched from the chamber, and improve the stability of the flight attitude.

The technical solution of the present invention is as follows: an electromagnetic railgun C-type armature, which includes a windward surface, a top surface, a bottom surface, side A, side B, a leeward surface and an inner surface; characterized in that, the leeward surface The windward surface has arc transitions with the top surface, the bottom surface and the inner surface respectively; the windward surface has arc transitions with the top surface and the bottom surface respectively, and bionic shark skin drag reduction surfaces are distributed on the three surfaces; the bionic shark skin drag reduction surface is There are multiple rows of grooves that are consistent with the direction of the track, and the groove depths are all the same; the side A and side B are both equipped with bionic super-hydrophobic drag-reducing surfaces; the bionic super-hydrophobic drag-reducing surfaces are multiple rows perpendicular to the direction of the track. Protrusion, the convex surface is part of the sphere.

A further technical solution is that the ratio of the depth to the width of the trench is 1:1, the spacing between the trenches is the same, and the ratio of the trench width to the spacing between trenches is 1:5.

A further technical solution is that the depth and width of the grooves are both 0.2mm, and the spacing between grooves is 1mm.

A further technical solution is that the ratio of the height of the protrusion to the radius of the circular bottom surface of the protrusion is 1:2.

A further technical solution is that the height of the protrusion is 0.16mm, and the radius of the circular bottom surface of the protrusion is 0.32mm.

A further technical solution is that the protrusions in two adjacent columns are arranged in a staggered manner.

A further technical solution is that the distance ratio between the offset distance of the protrusions in two adjacent columns in the direction perpendicular to the track and the distance between the two adjacent protrusions in each column is 1:2.

Compared with the existing technology, the present invention has the following advantages: by designing an electromagnetic railgun armature that combines two bionic drag-reducing surfaces, it can effectively reduce the air resistance experienced by the armature during its flight and ensure the stability of the armature's flight attitude. Improve the shooting accuracy and range of the electromagnetic railgun.

Description of the drawings

Figure 1 is an overall schematic diagram of the three-dimensional structure of the present invention;

Figure 2 is a schematic front view of the windward side of the three-dimensional structure of the present invention;

Figure 3 is a schematic front view of side A of the three-dimensional structure of the present invention.

In the picture: 1. Windward side; 2. Side A; 3. Bionic superhydrophobic drag reduction surface; 4. Bottom surface; 5. Leeward side; 6. Inner surface; 7. Top surface; 8. Side B; 9. Bionic shark Skin drag reducing surface.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and examples:

On the basis of the existing C-type armature of the electromagnetic railgun, the present invention conducted research on bionic surface drag reduction, focusing on bionic shark skin surface drag reduction and bionic super-hydrophobic surface drag reduction. The bionic shark skin surface achieves the purpose of reducing resistance by imitating, amplifying and simplifying the groove structure of the "cortex convex" on the shark skin surface. The bionic superhydrophobic surface also reduces the resistance by simulating, amplifying and simplifying the micro-nano structure of the hydrophobic surface of plants. The purpose of resistance. In the present invention, the applicant combines two drag reduction methods, laying out bionic super-hydrophobic surfaces on both sides of the C-shaped armature of the electromagnetic railgun, and laying out bionic shark skin surfaces on the windward side and the upper and lower sides that are in direct contact with the guide rails. It can effectively reduce the air resistance experienced by the armature after it comes out of the barrel to ensure the stability of the flight attitude, while improving the electromagnetic rail gun's firing accuracy and increasing its range.

Specifically, as shown in the figure, the present invention discloses an electromagnetic railgun C-type armature, which includes a windward surface 1, a top surface 7, a bottom surface 4, a side A2, a side B8, a leeward side 5 and an inner surface 6 ; It is characterized in that the leeward surface 5 has an arc transition with the top surface 7, the bottom surface 4 and the inner surface 6 respectively; the windward surface 1 has an arc transition with the top surface 7 and the bottom surface 4 respectively, and the three surfaces are provided with Bionic shark skin drag reduction surface 9; the bionic shark skin drag reduction surface 9 is composed of multiple rows of grooves in the same direction as the track, and the groove depths are all the same; the side A2 and side B8 are both equipped with bionic super-hydrophobic drag reduction surfaces 3; The bionic superhydrophobic drag-reducing surface 3 is composed of multiple rows of protrusions running perpendicular to the track direction, and the protruding surface is part of a sphere.

A further preferred embodiment of the present invention is that the ratio of the depth and width of the trench is 1:1, the spacing between the trenches is the same, and the ratio of the trench width to the spacing between trenches is 1:5 .

A further preferred embodiment of the present invention is that the depth and width of the grooves are both 0.2mm, and the distance between the grooves is 1mm.

A further preferred embodiment of the present invention is that the ratio of the height of the protrusion to the radius of the circular bottom surface of the protrusion is 1:2.

A further preferred embodiment of the present invention is that the height of the protrusion is 0.16mm, and the radius of the circular bottom surface of the protrusion is 0.32mm.

A further preferred embodiment of the present invention is that the protrusions in two adjacent columns are arranged in a staggered manner.

A further preferred embodiment of the present invention is that the distance ratio between the offset distance of the protrusions in two adjacent columns in the direction perpendicular to the track and the distance between the two adjacent protrusions in each column is 1:2.

A further preferred embodiment of the present invention is that the offset distance of the protrusions in two adjacent columns in the direction perpendicular to the track is 0.5 mm, and the distance between two adjacent protrusions in each column is 1 mm.

A further preferred embodiment of the present invention is that the length l of the armature is 25mm, the width m is 12mm, and the height n is 20.4mm. The windward side 1, the leeward side 5, the side A2 and the side B8 are all flat surfaces; the top surface 7 , the bottom surface 4 are two planes formed by the transition of the middle arc, and the radius of the transition arc is 10mm; the top surface 7 and the bottom surface 4 are respectively a plane of arc transition with the windward surface 1; the radius of the transition arc is 5mm, so The top surface 7 and the bottom surface 4 are respectively connected with the plane 2 of the arc transition of the leeward surface 5; the transition arc radius is 1mm, and the angle between the plane 1 and the plane 2 is 17°; the inner surface 6 includes the front end and both sides of the wings. , the front end and both sides of the wings are arc transitions respectively, and the radius of the transition arc is 3mm; the front end is a plane, parallel to the windward surface 1, and the two sides of the wings are planes, and the angles between them and the plane 1 are both 17°. In addition, plane 1 is perpendicular to the leeward side 5 and the windward side 1 respectively.

Claims (5)

1. An electromagnetic railgun C-type armature, which includes a windward surface, a top surface, a bottom surface, a side A, a side B, a leeward surface and an inner surface; characterized in that the leeward surface is connected to the top surface and the bottom surface respectively. and the inner surface arc transition; the windward surface has arc transition with the top surface and the bottom surface respectively, and the three surfaces are equipped with bionic shark skin drag reduction surfaces; the bionic shark skin drag reduction surfaces are arranged in multiple rows consistent with the track direction The grooves have the same depth; the side A and the side B are both equipped with bionic super-hydrophobic drag-reducing surfaces; the bionic super-hydrophobic drag-reducing surfaces are multiple rows of protrusions that are perpendicular to the track direction, and the protrusions are The surface is a part of the sphere, the ratio of the depth and width of the groove is 1:1, the spacing between the grooves is the same, the ratio of the groove width and the spacing between the grooves is 1:5. The protrusions in two adjacent columns are arranged in a staggered manner. 2. An electromagnetic railgun C-type armature according to claim 1, characterized in that the ratio of the height of the protrusion to the radius of the circular bottom surface of the protrusion is 1:2. 3. A C-type armature of an electromagnetic rail gun according to claim 1, characterized in that the offset distance of the protrusions in two adjacent columns in the direction perpendicular to the track is different from that of the two adjacent protrusions in each column. The distance ratio between the two is 1:2. 4. An electromagnetic railgun C-type armature according to claim 1, characterized in that the depth and width of the grooves are both 0.2mm, and the spacing between grooves is 1mm. 5. An electromagnetic railgun C-type armature according to claim 2, characterized in that the height of the protrusion is 0.16mm, and the radius of the circular bottom surface of the protrusion is 0.32mm.