A missile high-speed water entry head direction-changing stabilization device

Abstract

The present invention discloses a missile high-speed water-entry head direction-changing and stabilizing device, which belongs to the field of missile water-entry stabilizing devices. The present invention comprises a missile, a load-bearing shell, a circular hole, a direction-changing warhead, an omnidirectional rotating seat, a connecting rod, a screw motor, a motor ball head, and a connecting rod ball head. The outer structure of the load-bearing shell is a combination of a cylindrical shell and a hemispherical shell, which is fixed to the missile head and is used to support the movement of the load-bearing shell and to fix the omnidirectional rotating seat and the motor ball head; the direction-changing warhead has a front streamline shape, and a spherical concave surface inwardly on the rear side, and the spherical concave surface has the same center and radius as the hemispherical shell of the load-bearing shell. When the missile enters the water, there is an angle with the sea surface. The present invention can adjust the direction of entry of the direction-changing warhead, reduce the adverse effects of seawater on the missile, and prevent the missile from skipping or becoming unstable after entering the water. The present invention can correct the missile trajectory, ensure the missile's attitude is stable, the trajectory will not deviate, and has excellent stabilization performance.

Description

Technical Field

[0001] The invention belongs to the field of missile water entry stabilization devices, and in particular relates to a missile high-speed water entry head direction-changing stabilization device. Background Art

[0002] Anti-ship missiles are a crucial weapon for defending against foreign invading vessels, safeguarding my country's maritime sovereignty, and building a strong maritime nation. They are a crucial indicator of a nation's military strength and hold significant strategic significance. While traditional anti-ship missiles typically strike the portion of a ship above the waterline, new anti-ship missiles will utilize submerged strikes to target the hull below the waterline. When a missile explodes underwater, because water is much denser than air and is incompressible, the explosive energy directly impacts the ship through the water, creating a more significant destructive effect and potentially causing a ship to take on water or even sink.

[0003] When a missile enters the water at high speed, it is tilted at a slight angle, meaning it enters the water at an acute angle to the sea level (not perpendicular to the water). At this point, the underside of the missile's head first contacts the water, causing asymmetric fluid forces to act on the missile's head, shifting its attitude and deviating from its intended trajectory. This can even cause the missile to "skip" on the water surface. Furthermore, after entering the water, the cavitation surrounding the missile body prevents the tail or flanks (control surfaces) from fully contacting the water, reducing control capabilities and further leading to post-entry instability. Therefore, ensuring the missile's attitude is stable upon high-speed water entry and preventing deviations in its attack trajectory is a key research priority. Summary of the Invention

[0004] The present invention addresses the following problems in the prior art: (1) the missile deviates from its predetermined trajectory due to the force of seawater fluid; and (2) the missile becomes unstable after entering the water. The main purpose of the present invention is to provide a high-speed water-entry missile head stabilization device. The device is installed at the missile head and, when the missile enters the water, adjusts the angle of the directional warhead to change the direction of the force, thereby achieving a stable missile entry without trajectory deviation.

[0005] The purpose of the present invention is achieved through the following technical solutions.

[0006] The invention discloses a missile high-speed water-entry head direction-changing and stabilizing device, comprising a missile, a carrying shell, a circular hole, a direction-changing warhead, an omnidirectional rotating seat, a connecting rod, a screw motor, a motor ball head, and a connecting rod ball head.

[0007] The outer structure of the carrying shell is a combination of a cylindrical shell and a hemispherical shell, which is fixed to the head of the missile, used to support the movement of the carrying shell and to fix the omnidirectional rotating seat and the motor ball head; the outer shape of the changing direction warhead is streamlined at the front, and there is a spherical concave surface on the rear side. The spherical concave surface has the same center and radius as the hemispherical shell of the carrying shell, and is used to change the direction of the action of the seawater fluid force on the changing direction warhead, so as to ensure that the missile enters the water with a stable posture and the trajectory will not deviate; the omnidirectional rotating seat is fixed inside the carrying shell, and consists of an internal freely rotating sphere and a supporting structure. The sphere has the same center as the hemispherical shell part of the carrying shell, and is used to ensure that the changing direction warhead and the carrying shell are tightly fitted during the rotation of the changing direction warhead; the connecting rod passes through the carrying shell The circular hole of the cartridge case connects the ball of the omnidirectional rotating seat and the changing warhead; the screw motor is connected to the connecting rod, and provides driving force for the connecting rod through the telescopic effect along the axial direction of the screw, so as to realize the changing warhead rotating along the hemispherical surface of the supporting cartridge case. A single screw motor cannot realize the omnidirectional rotation of the changing warhead. Three or more screw motors will increase the cost and processing difficulty of the device. Therefore, two screw motors are provided, which are arranged in the supporting cartridge case at 90° along the circumferential direction; two motor ball heads are provided, which are provided at the bottom of the screw motor and fixed to the inner wall of the supporting cartridge case. Two connecting rod ball heads are provided, which are provided at the connection between the connecting rod and the screw of the screw motor. The motor ball head and the connecting rod ball head are used to increase the degree of freedom of the screw motor during operation.

[0008] The working method of the missile high-speed water entry head direction-changing stabilization device disclosed in the present invention is as follows:

[0009] During sea-skimming flight, the missile's directional warhead remains stationary, with the connecting rod positioned through the circular hole in its initial position. When the missile enters the water at a shallow angle, it maintains a certain angle with the sea surface. To mitigate the adverse effects of the water, the leadscrew motor adjusts the extension of the leadscrew, driving the connecting rod to rotate about the center of the spherical swivel seat, adjusting the direction of the directional warhead. This alters the direction of the fluid forces acting on the warhead, reducing the adverse effects of the water on the missile and ensuring a stable entry into the water without trajectory deviation. The inward-facing spherical concave surface of the directional warhead aligns with the center and radius of the hemispherical shell supporting the missile case, allowing the warhead to rotate along the hemispherical surface of the shell, maintaining a well-defined streamlined shape without compromising its dynamic performance. Once the missile is fully submerged, the leadscrew motor resets the directional warhead, allowing the missile to fly straight through the water and accurately impact its target.

[0010] In order to ensure that the missile maintains a good streamline shape during the rotation of the deflection warhead and the deflection warhead can have a large rotation angle, it is preferred that the central angle of the arc formed by the spherical concave surface on the rear side of the deflection warhead is θ, and θ∈[120°, 150°].

[0011] Beneficial effects:

[0012] 1. The present invention discloses a missile high-speed water-entry head deflection stabilization device. When the missile enters the water, the device adjusts the direction of the deflection head to change the direction of the fluid force acting on the missile, thereby reducing the adverse effects of seawater on the missile's flight. This device can thereby correct the missile's trajectory and ensure the missile's stable attitude when the missile enters the water.

[0013] 2. The present invention discloses a missile high-speed water entry head stabilization device. The warhead is streamlined and fits perfectly with the hemispherical shell that supports the shell. The center of rotation of the warhead is the same as the center of the hemispherical shell that supports the shell. When the device rotates and changes direction along the hemispherical surface, it remains well streamlined, does not generate additional, raised force-bearing surfaces, and does not affect the missile's dynamic performance.

[0014] 3. The present invention discloses a missile high-speed water entry head direction-changing and stabilizing device, which is provided with ball heads at the bottom of the screw motor and at the position where the screw acts on the connecting rod, to ensure that the screw motor has sufficient degrees of freedom when driving the connecting rod to rotate, and the screw does not generate bending moment and torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the device;

[0016] Figure 2 A three-dimensional diagram of the internal structure of the device;

[0017] Figure 3 This device carries a three-dimensional diagram of the internal structure of the cartridge case;

[0018] Figure 4 A three-dimensional diagram of the interaction of the internal structure of the device when the directional warhead rotates;

[0019] Figure 5 A schematic diagram of the rotation of the device's directional-changing warhead;

[0020] In the attached figure: 1—missile, 2—carrying shell, 3—circular hole, 4—direction-changing warhead, 5—omnidirectional rotating seat, 6—connecting rod, 7—screw motor, 8—motor ball head, 9—connecting rod ball head. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 、 Figure 2 、 Figure 3As shown, the embodiment discloses a missile high-speed water entry head direction-changing stabilization device, including a missile 1, a carrying shell 2, a circular hole 3, a direction-changing warhead 4, an omnidirectional rotating seat 5, a connecting rod 6, a screw motor 7, a motor ball head 8, and a connecting rod ball head 9.

[0023] like Figure 1 As shown, the present invention comprises a missile 1, a carrier shell 2, and a redirectable warhead 4. The hemispherical shell of the carrier shell 2 is provided with a circular hole 3, created by cutting away a portion of the hemispherical shell. The circular hole 3 is parallel to and coaxial with the circular surface of the cylindrical shell portion of the carrier shell 2. The redirectable warhead 4 has a streamlined front profile, exhibiting excellent fluid dynamics. Its rearward side features a spherical concave surface, which has the same center and radius as the hemispherical shell of the carrier shell 2 and conforms to the hemispherical shell of the carrier shell 2.

[0024] like Figure 2 and Figure 3 As shown, the omnidirectional rotating seat 5 is fixed inside the carrier shell 2. The center of the freely rotating sphere inside the omnidirectional rotating seat 5 is the same as the center of the hemispherical shell portion of the carrier shell 2. The connecting rod 6 passes through the circular hole 3, and its two ends are respectively connected to the sphere of the omnidirectional rotating seat 5 and the redirecting warhead 4. Because the center of the sphere is the same as the center of the hemispherical shell portion of the carrier shell 2, the redirecting warhead 4 can rotate along the hemispherical shell portion of the carrier shell 2. Two screw motors 7 are provided, arranged at 90 degrees circumferentially within the hemispherical shell of the carrier shell 2. The bottom of each screw motor 7 is provided with a motor ball head 8, which is fixed to the inner wall of the carrier shell 2. The connection between the screw of the screw motor 7 and the connecting rod 6 is provided with a connecting rod ball head 9. The arrangement of the motor ball head 8 and the connecting rod ball head 9 ensures that the screw motor 7 has sufficient degrees of freedom when driving the connecting rod 6 to rotate, and no bending moment or torque is generated on the screw.

[0025] like Figure 4 As shown, the screw motor 7 acts on the connecting rod 6 to control the rotation of the connecting rod 6, the center of rotation is the center of the sphere inside the omnidirectional rotating seat 5, and the connecting rod 6 drives the redirecting warhead 4 to rotate along the hemispherical shell part of the supporting shell 2. Figure 5 As shown, the redirectable warhead 4 always fits with the hemispherical shell part of the carrying shell 2 when adjusting its direction (the dotted line is the position of the redirectable warhead 4 after adjustment), and the missile will maintain a good streamline shape without affecting the dynamic performance of the missile.

[0026] The working method of the missile high-speed water entry head direction-changing and stabilizing device disclosed in this embodiment is as follows:

[0027] When the missile is skimming the sea, the reversible warhead 4 does not rotate. When the missile is about to enter the water (entering the water at a shallow angle), the present device controls the reversible warhead 4 to rotate toward the sea level via the lead screw motor 7 before the missile enters the water. This redirects the force acting on the reversible warhead 4, causing the missile to generate a downward force that reduces the adverse effects of the seawater. This resolves issues such as the missile skipping in the seawater and unstable posture after entering the water. After the missile is fully submerged, the lead screw motor 7 controls the reversible warhead 4 to reset, allowing the missile to fly straight through the water and accurately hit its target. This invention ensures a stable posture and a stable trajectory after the missile enters the water.

[0028] The above is only a preferred embodiment of the present invention, but it is not limited to the above embodiments when it is implemented. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A missile high-speed water entry head direction-changing stabilization device, characterized by: It comprises a missile (1), a carrying shell (2), a circular hole (3), a direction-changing warhead (4), an omnidirectional rotating seat (5), a connecting rod (6), a screw motor (7), a motor ball head (8), and a connecting rod ball head (9); The outer structure of the carrying shell (2) is a combination of a cylindrical shell and a hemispherical shell, which wraps the head of the missile (1); the circular hole (3) is provided on the hemispherical shell of the carrying shell (2), and the circular hole (3) is parallel to and coaxial with the circular surface of the cylindrical shell; the outer shape of the deflection warhead (4) is a front streamline shape, and the rear side has a spherical concave surface inwardly, the spherical concave surface has the same center and radius as the hemispherical shell of the carrying shell (2), and the concave surface fits the hemispherical shell of the carrying shell (2); the omnidirectional rotating seat (5) is fixed inside the carrying shell (2), and a A freely rotatable sphere is provided, and the center of the sphere is the same as that of the hemispherical shell of the carrying shell (2); the connecting rod (6) passes through the circular hole (3), and the two ends are respectively connected to the sphere of the omnidirectional rotating seat (5) and the direction-changing bullet (4); two screw motors (7) are provided, and are arranged in the hemispherical shell of the carrying shell (2) at 90 degrees along the circumferential direction; two motor ball heads (8) are provided, which are provided at the bottom of the screw motor (7) and fixed to the inner wall of the carrying shell (2); two connecting rod ball heads (9) are provided, and are provided at the connection between the connecting rod (6) and the screw of the screw motor (7).

2. A missile high-speed water entry head direction-changing and stabilizing device according to claim 1, characterized in that: The circular hole (3) is realized by cutting off a portion of the hemispherical shell body that carries the cartridge case (2).

3. The missile high-speed water entry head direction-changing and stabilizing device according to claim 1, characterized in that: The central angle of the arc formed by the spherical concave surface at the rear side of the deflection bullet (4) is θ, θ∈[120°, 150°].

4. The missile high-speed water entry head direction-changing and stabilizing device according to claim 1, characterized in that: The arrangement of the motor ball head (8) and the connecting rod ball head (9) ensures that the screw motor (7) has sufficient freedom when driving the connecting rod (6) to rotate, and no bending moment and torque are generated on the screw.

5. A missile (1) high-speed water entry head direction-changing and stabilizing device according to claim 1, 2, 3 or 4, characterized in that: When the missile (1) is flying over the sea, the deflection warhead (4) does not rotate, and the connecting rod (6) passes through the circular hole to be in the initial state; when the missile (1) is tilted into the water at a small angle, there is a certain angle between it and the sea surface. In order to reduce the adverse effect of seawater, according to the angle of entry of the missile (1), the screw motor (7) changes the extension of the screw to drive the connecting rod (6) to rotate with the center of the spherical ball of the omnidirectional rotating seat as the rotation center, thereby adjusting the direction of the deflection warhead (4), thereby changing the direction of the fluid force on the deflection warhead (4), and reducing the impact of seawater on the missile (1). The invention can avoid the adverse effects of the missile (1), so that the missile (1) can enter the water in a stable posture without deviation in the trajectory; the inward spherical concave surface of the deflection warhead (4) is the same as the center and radius of the hemispherical shell part of the supporting shell (2), and the deflection warhead (4) can rotate along the hemispherical surface of the supporting shell (2), and the missile (1) maintains a good streamline shape without affecting the dynamic performance of the missile (1); after the missile (1) completely enters the water, the screw motor (7) controls the deflection warhead (4) to reset, and the missile (1) can fly straight in the water and accurately hit the target.

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