A missile nose deformation stabilization device for high-speed water entry

Abstract

This invention discloses a missile nose cone deformation stabilization device for high-speed water entry, belonging to the field of missile water entry stabilization. The invention includes several sections adapted to the missile nose cone, a lead screw motor, a locking mechanism, a lead screw ball joint, a boss ball joint, an elastic sealing sleeve, an electric motor, gears, and a pull rack. The sections have a streamlined shape along the missile body. Ball joints are provided at the location where the lead screw motor is installed and on the lead screw motor to ensure sufficient degrees of freedom when driving the sections to rotate and deform. This invention is installed on the missile nose cone. When the missile enters the water, the lead screw motor adjusts the angle of the nose cone, thereby changing the direction of the hydrodynamic force on the nose cone and ensuring the missile maintains stability during water entry. After the missile body is fully submerged, the extension of the lead screw drives the sections to rotate and deform, allowing the missile nose cone to return to its original shape, improving the missile's aerodynamic performance in water and enhancing its accuracy.

Description

Technical Field

[0001] This invention belongs to the field of missile water entry stabilization, specifically relating to a device for stabilizing the deformation of the missile's nose cone during high-speed water entry. Background Technology

[0002] Traditional anti-ship missiles are launched to strike the part of a surface ship above the waterline. The energy from the missile explosion needs to pass through the air to reach the ship. However, new anti-ship missiles have changed their water-entry attack method. After entering the water, they mainly strike the part of the ship below the waterline. This attack method allows the energy from the missile explosion to pass directly through the seawater to reach the ship. Compared with traditional anti-ship missiles, the effect of attacking ships is more significant, and it can directly cause the ship to take on water or even sink.

[0003] The nose cone of the new anti-ship missile has a symmetrical shape with the plane of its axis as the plane of symmetry. After launch, the missile enters the water at a small angle (acute angle) to the sea level. At this point, the lower part of the missile nose cone contacts the seawater first, resulting in an asymmetric force exerted on the missile nose cone by the seawater. This asymmetric force causes the lower part of the missile nose cone to bend upwards, deviating from its original trajectory and ultimately breaking through the water surface, failing to complete its intended strike mission. Furthermore, after entering the water, the cavitation bubbles surrounding the missile body prevent the tail fins or side fins (control surfaces) from fully contacting the seawater, reducing the missile's controllability and further contributing to instability after entry. Therefore, ensuring the stability of the missile's attitude during high-speed water entry is an important research direction for improving missile combat accuracy. Summary of the Invention

[0004] To address the aforementioned problems, the main objective of this invention is to provide a missile nose deformation stabilization device for high-speed water entry. This device is installed on the missile nose and, when the missile enters the water, adjusts the angle of the nose to change the direction of the hydrodynamic force of the seawater on the nose, ensuring the stability of the missile's attitude during high-speed water entry and preventing trajectory deviation.

[0005] The objective of this invention is achieved through the following technical solution.

[0006] This invention discloses a high-speed water-entry nose deformation stabilization device for missiles, comprising several sections adapted to the missile nose, a lead screw motor, a locking mechanism, a lead screw ball end, a boss ball end, an elastic sealing sleeve, a motor, gears, and a pull rack. The sections are connected by the locking mechanism, and the sections have a streamlined shape along the missile body. The locking mechanism includes an upper rack, a torsion spring, a torsion spring upper plate, a pin, a spring support, and limiting teeth. The elastic sealing sleeve is tightly fitted to the sections.

[0007] When the missile enters the water, the lead screw motor changes the extension of the lead screw, causing several sections to rotate and deform. As these sections rotate, the upper plates of the torsion springs located on the upper part of the missile warhead move. Under the action of the torsion springs, the upper plates of the torsion springs are repositioned in the appropriate position on the upper rack. At the same time, as these sections rotate, the upper plates of the torsion springs located on the lower part of the missile warhead remain stationary under the action of the torsion springs, and continue to be engaged with the limiting teeth, thereby changing the direction of the warhead. By adjusting the direction of the warhead, the hydrodynamic force of the seawater on the warhead is changed, ensuring the stability of the missile's attitude when entering the water at high speed.

[0008] Once the missile body is fully submerged in water, the upper rack in each segment, driven by an electric motor, rotates at a certain angle through the meshing of gears and the pulling rack. This causes the pulling rack to displace the upper rack of each segment from the upper plate of the torsion spring. The lead screw motor then alters the extension of the lead screw to rotate and deform several segments, causing the upper plate of the torsion spring to re-engage with the limiting teeth. This restores the missile warhead to its original shape, ensuring that the missile can fly in a straight line in water, improving its aerodynamic performance and increasing its accuracy.

[0009] The number, shape, and size of the aforementioned segments are adapted to the missile's warhead. The end segments have a conical shell shape, while the remaining segments have a frustum-shaped drum shell shape.

[0010] Two adjacent segments are defined as the front segment and the rear segment respectively along the direction from the tail to the head of the missile, with the foremost segment being the first segment and the last segment being the terminal segment.

[0011] The snap-fit ​​mechanism connecting the front and rear sections is as follows: the upper rack and the limiting tooth are installed on the front section, and the limiting tooth is connected to the upper rack. There are two spring supports, and the two spring supports are installed on the rear section. The torsion spring and the upper plate of the torsion spring are connected to the spring supports through a pin. The upper plate of the torsion spring and the pin are rotated together. One end of the torsion spring is attached to the rear section, and the other end is attached to the upper plate of the torsion spring. The upper plate of the torsion spring is snapped onto the limiting tooth.

[0012] The pull rack is rigidly connected to the upper rack on each section. Limiting bosses are installed on both sides of the pull rack to restrict the degree of freedom of the pull rack along the axial direction of the motor output shaft. The motor is installed on one side of the upper rack, and the gear is installed on the output shaft of the motor. The gear meshes with the pull rack for transmission.

[0013] Preferably, there are four locking mechanisms between the front and rear sections, arranged circumferentially at 90°.

[0014] There are four lead screw motors arranged at 90° circumference, and the bottom of each lead screw motor has a spherical concave surface.

[0015] The boss ball head is installed on the boss of the first section body. There are four boss ball heads in total, arranged at 90° around the circumference.

[0016] There are four ball joints in total, which are installed on the top of the ball screw motor.

[0017] The lead screw motor is mounted on the boss ball head of the first section through a spherical concave surface, and the top of the lead screw motor is mounted in the rotary hole of the second end section through the lead screw ball head. Beneficial effects

[0018] 1. This invention discloses a missile high-speed water entry head deformation stabilization device, installed on the missile's head. When the missile enters the water, a lead screw motor adjusts the angle of the warhead, thereby changing the direction of the hydrodynamic force on the warhead, preventing the missile head from bending upwards, ensuring the missile maintains stable attitude during water entry, and not altering the missile's original trajectory. After the missile body is fully submerged, the lead screw motor further drives several sections to rotate and deform by changing the extension of the lead screw, causing the upper plate of the torsion spring to re-lock onto the limiting teeth, restoring the missile warhead to its original shape. This ensures the missile can fly in a straight line in water, improves the missile's aerodynamic performance in water, and enhances the missile's accuracy.

[0019] 2. The present invention discloses a missile high-speed water entry nose deformation stabilization device, in which several sections are streamlined in shape along the direction of the missile body, without generating additional force-bearing surfaces, and without generating additional resistance during the missile's water entry process.

[0020] 3. The present invention discloses a missile high-speed water entry head deformation stabilization device, which has ball joints at the position of the lead screw motor and on the lead screw motor to ensure that the lead screw motor has sufficient degrees of freedom when driving several sections to rotate and deform, and the lead screw part will not generate bending moment and torque. Attached Figure Description

[0021] Figure 1 A schematic diagram of the installation of the device of the present invention on a missile;

[0022] Figure 2 A schematic diagram of the external shape of the device before deformation;

[0023] Figure 3 Schematic diagram of the connection of the device of the present invention before deformation;

[0024] Figure 4 Schematic diagram of the lead screw motor drive of the device of the present invention;

[0025] Figure 5 A schematic diagram of the screw motor installation in the device of the present invention;

[0026] Figure 6 Schematic diagram of the lead screw motor of the device of the present invention;

[0027] Figure 7 A schematic diagram of the deformed shape of the device of the present invention;

[0028] Figure 8 A schematic diagram of the device of the present invention after deformation driven by the lead screw motor.

[0029] Figure 9 Connection diagram of the device of the present invention when restored to its original shape;

[0030] Figure 10 The device of this invention returns to its original shape after the missile has fully entered the water;

[0031] Wherein: 1-First section, 2-Second section, 3-Third section, 4-Fourth section, 5-Screw motor, 6-Snapping mechanism, 601-Upper rack, 602-Torsion spring, 603-Torsion spring upper plate, 604-Pin, 605-Spring support, 606-Limiting tooth, 7-Screw ball head, 8-Boss ball head, 9-Elastic sealing sleeve, 10-Motor, 11-Gear, 12-Pulling rack. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] like Figures 1-6 As shown in the figure, this embodiment discloses a missile high-speed water entry head deformation stabilization device, including a first section 1, a second section 2, a third section 3, a fourth section 4, a lead screw motor 5, a latching mechanism 6, a lead screw ball head 7, a boss ball head 8, an elastic sealing sleeve 9, a motor 10, a gear 11, and a pulling rack 12.

[0034] like Figure 1 and Figure 2 As shown, in this embodiment, the device is installed on the missile's nose cone. The first section 1, the second section 2, and the third section 3 have a frustum-shaped shell structure, while the fourth section 4 has a conical shell structure. The first section 1, the second section 2, the third section 3, and the fourth section 4 are nested together sequentially, and the overall shape is streamlined along the missile body direction. The first section 1 is the foremost section in the invention, and the fourth section 4 is the terminal section.

[0035] like Figure 3As shown, the first section 1 and the second section 2, the second section 2 and the third section 3, and the third section 3 and the fourth section 4 are all connected by a snap-fit ​​mechanism 6. The snap-fit ​​mechanism 6 includes an upper rack 601, a torsion spring 602, a torsion spring upper plate 603, a pin 604, a spring support 605, and a limiting tooth 606. The snap-fit ​​mechanism 6 is used to realize the connection between two adjacent sections before deformation and to re-clamp them after rotational deformation.

[0036] Taking the connection of a snap-fit ​​mechanism 6 between the second section 2 and the third section 3 as an example: the upper rack 601 and the limiting tooth 606 are installed on the second section 2, and the upper rack 601 and the limiting tooth 606 are connected and installed; there are two spring supports 605, and the two spring supports 605 are installed on the third section 3; the torsion spring 602 and the torsion spring upper plate 603 are connected to the spring support 605 through the pin 604, and the torsion spring upper plate 603 and the pin 604 are rotated together. One end of the torsion spring 602 is attached to the third section 3, and the other end is attached to the torsion spring upper plate 603. The torsion spring upper plate 603 is snapped on the limiting tooth 606.

[0037] There are four of the aforementioned latching mechanisms 6 between the second section 2 and the third section 3, arranged circumferentially at 90°.

[0038] The pull rack 12 is rigidly connected to the upper rack 601 on each segment. Limiting bosses are installed on both sides of the pull rack 12 to restrict the degree of freedom of the pull rack 12 along the output shaft of the motor 10 in the axial direction. The motor 10 is installed on one side of the upper rack 601, and the gear 11 is installed on the output shaft of the motor 10. The gear 11 and the pull rack 12 can mesh and transmit power.

[0039] like Figure 4 , Figure 5 and Figure 6 As shown, there are four lead screw motors 5 arranged at 90° circumferentially. The bottom of each lead screw motor 5 is provided with a spherical concave surface. The lead screw motors 5 are used to provide power for the device in this embodiment during deformation.

[0040] The boss ball head 8 is installed on the boss of the first section 1. There are four boss ball heads 8, which are arranged at 90° circumferentially.

[0041] There are four ball heads 7 in total, which are clearly installed on the top of the ball screw of the ball screw motor 5.

[0042] The lead screw motor 5 is mounted on the boss ball head 8 of the first section 1 via a spherical concave surface, and rotates in contact with the spherical concave surface and the boss ball head 8. The top of the lead screw motor 5 is mounted in the rotation hole of the fourth section 4 via a lead screw ball head 7, and rotates in contact with the rotation hole on the fourth section 4. The lead screw motor 5, through the boss ball head 8 and the lead screw ball head 7, ensures that the lead screw motor 5 has sufficient degrees of freedom when driving the first section 1, the second section 2, the third section 3, and the fourth section 4 to rotate and deform, and the lead screw will not generate bending moment or torque.

[0043] The elastic sealing sleeve 9 is tightly fitted to the outside of the first section 1, the second section 2, the third section 3 and the fourth section 4. The elastic sealing sleeve 9 is bonded to the outermost side to serve as a waterproofing element.

[0044] The working method of the missile high-speed water entry nose deformation stabilization device disclosed in this embodiment is as follows:

[0045] like Figure 7 and Figure 8 As shown, before the missile warhead deforms, the initial positions of the torsion spring upper plates 603 of the four segments are locked on the limiting teeth 606. When the missile enters the water, it tilts into the water at a small angle (acute angle) with the sea surface. According to the angle of the missile entering the water, the lead screw motor 5 drives the first segment 1, the second segment 2, the third segment 3, and the fourth segment 4 to rotate and deform by changing the extension of the lead screw. When the four segments rotate, the torsion spring upper plates 603 located at the top of the missile warhead move. Under the action of the torsion spring 602, the torsion spring upper plates 603 are locked back into the appropriate position of the upper rack 601. At the same time, when the four segments rotate, the torsion spring upper plates 603 located at the bottom of the missile warhead remain stationary under the action of the torsion spring 602. The torsion spring upper plates 603 continue to be locked on the limiting teeth 606, ultimately realizing the change of the warhead direction.

[0046] like Figure 9 , Figure 10 As shown, when the missile body is fully submerged in water, the upper rack 601 in each segment will be driven by the motor 10. Through the meshing between the gear 11 and the pulling rack 12, the pulling rack 12 pulls the upper rack 601 on each segment, rotating it by a certain angle to achieve misalignment with the upper plate 603 of the torsion spring. The lead screw motor 5 then drives the first segment 1, the second segment 2, the third segment 3, and the fourth segment 4 to rotate and deform by changing the extension of the lead screw. This causes all the upper plates 603 of the torsion spring located on the upper part of the missile warhead to re-lock back into the limiting teeth 606, ultimately restoring the missile warhead to its original shape, thus ensuring that the missile can fly in a straight line in the water and accurately hit the target.

[0047] The above description is only a preferred implementation of this embodiment, but the implementation is not limited to the above embodiment. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this embodiment, and these improvements and modifications should also be considered within the protection scope of this embodiment.

Claims

1. A device for stabilizing the deformation of a missile's nose cone upon high-speed water entry, characterized in that: The system includes several sections adapted to the missile's nose section, a lead screw motor, a locking mechanism, a lead screw ball end, a boss ball end, an elastic sealing sleeve, a motor, gears, and a pull rack. The sections are connected by the locking mechanism, and the sections have a streamlined shape along the missile body. The locking mechanism includes an upper rack, a torsion spring, a torsion spring upper plate, a pin, a spring support, and limiting teeth. The elastic sealing sleeve is tightly fitted to the sections. When the missile enters the water, the lead screw motor changes the extension of the lead screw, causing several sections to rotate and deform. When these sections rotate, the upper plates of the torsion springs located on the upper part of the missile warhead move. Under the action of the torsion springs, the upper plates of the torsion springs are repositioned in the appropriate position on the upper rack. At the same time, when these sections rotate, the upper plates of the torsion springs located on the lower part of the missile warhead remain stationary under the action of the torsion springs. The upper plates of the torsion springs continue to be engaged on the limiting teeth, thereby changing the direction of the warhead. In turn, by adjusting the direction of the warhead, the hydrodynamic direction of the seawater on the warhead is changed. Once the missile body is fully submerged in water, the upper rack in each segment, driven by an electric motor, rotates at a certain angle through the meshing of gears and the pulling rack. This causes the pulling rack to displace the upper rack of each segment, thus misaligning it with the upper plate of the torsion spring. The lead screw motor then drives several segments to rotate and deform by changing the extension of the lead screw, thereby causing the upper plate of the torsion spring to re-lock onto the limiting teeth. This restores the missile warhead to its original shape, ensuring that the missile can fly in a straight line in the water. The number, shape, and size of the aforementioned segments are adapted to the missile's warhead; the end segments are conical shells, while the remaining segments are frustum-shaped drum shells. Two adjacent segments are defined as the front segment and the rear segment respectively along the direction from the tail to the head of the missile, and the foremost segment is defined as the first segment and the last segment as the terminal segment. The connection method of the snap-fit ​​mechanism between the front section and the rear section is as follows: the upper rack and the limiting tooth are installed on the front section, the limiting tooth is connected to the upper rack, there are two spring supports, the two spring supports are installed on the rear section, the torsion spring and the upper plate of the torsion spring are connected to the spring supports through the pin, the upper plate of the torsion spring and the pin are rotated together, one end of the torsion spring is attached to the rear section, the other end is attached to the upper plate of the torsion spring, and the upper plate of the torsion spring is snapped on the limiting tooth; There are four of the above-mentioned latching mechanisms between the front and rear sections, arranged at 90° circumferentially; There are four lead screw motors arranged at 90° circumferentially, and the bottom of each lead screw motor is provided with a spherical concave surface. The boss ball head is installed on the boss of the first section body. There are four boss ball heads in total, arranged at 90° around the circumference. There are four ball joints in total, which are installed on the top of the ball screw motor. The lead screw motor is mounted on the boss ball head of the first section through a spherical concave surface, and the top of the lead screw motor is mounted in the rotary hole of the second end section through the lead screw ball head.

2. The missile high-speed water entry nose deformation stabilization device as described in claim 1, characterized in that: The pull rack is rigidly connected to the upper rack on each section. Limiting bosses are installed on both sides of the pull rack to restrict the degree of freedom of the pull rack along the axial direction of the motor output shaft. The motor is installed on one side of the upper rack, and the gear is installed on the output shaft of the motor. The gear meshes with the pull rack for transmission.

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