An external airbag-type combined load-reducing device and method for high-speed water entry of a navigation body

Abstract

The present invention discloses an external airbag-type combined load-reducing device and method for a high-speed water entry of a vehicle. The structure mainly includes a retractable load-reducing rod, an airbag load-reducing device and a buffer module. The retractable load-reducing rod includes a disc-shaped cavitator, a cylindrical rod and a base. The tail base cooperates with the vehicle through a stepped hole. The airbag load-reducing device includes a foldable airbag and a gas generating device. The airbag is placed on the side wall of the cylindrical rod, and the buffer module is placed inside the stepped hole. After the high-speed water entry of the vehicle with the external airbag-type combined load-reducing structure enters the water, the load-reducing rod contracts, the airbag inflates, and the load-reducing module compresses and absorbs energy to reduce the impact load of the vehicle entering the water. After the airbag falls off, the load-reducing rod contracts completely and does not affect the subsequent movement of the vehicle. The present invention improves the stability of the vehicle entering the water at high speed and achieves safe entry of the vehicle into the water by means of an external airbag-type combined load-reducing method.

Description

Technical Field

[0001] The present invention belongs to the technical field of load reduction when a navigation body enters water across a medium at high speed, and in particular to a device and method for reducing the load when a navigation body enters water at high speed with an external airbag. Background Art

[0002] During high-speed water entry, a vehicle is subjected to a sudden change in medium density, subjecting it to a massive impact load. This powerful load can damage the vehicle's structure, cause internal component failure, and lead to underwater trajectory instability, significantly impacting performance. Therefore, it is necessary to reduce the impact loads on the vehicle during high-speed water entry.

[0003] The airbag load-reducing structures disclosed in the prior art can achieve a certain degree of load reduction during the entry of a vehicle into the water by utilizing the buoyancy of the inflated airbag. However, this approach still has limitations. If the airbag is installed on the side wall of the vehicle, it cannot effectively reduce the load on the head. If it is installed on the end face of the head, it not only affects the stability of the vehicle entering the water, but also prevents it from being released in time, hindering the movement of the vehicle after entering the water. Therefore, it is necessary to optimize the design of the airbag load-reducing structure. Summary of the Invention

[0004] The purpose of the present invention is to provide an external airbag-type combined load-reducing device and method for high-speed water entry of a navigation body, so as to make up for the problem that the existing airbag device has limited load-reducing capacity when the navigation body enters water.

[0005] The technical solutions for achieving the purpose of the present invention are:

[0006] An external airbag-type combined load-reducing device for a high-speed water entry vehicle, comprising:

[0007] The disc cavitator serves as the contact part between the vehicle and the water when the vehicle enters the water;

[0008] A connecting rod, the two ends of which are connected to the disc cavitator and the chassis respectively, and are used to install the gas generating device, the control device and the electromagnet;

[0009] A foldable airbag is provided between the outer wall of the connecting rod and the sleeve, and can be inflated and expanded to reduce the load when the gas generating device is activated;

[0010] A fixing module, used to connect the foldable airbag, is embedded in the connecting rod and is directly provided with a separation module from the embedded connecting rod, and is capable of limiting the position of the connecting rod after contraction;

[0011] The electromagnet is used to attract the fixing module under the action of magnetic force to connect the fixing module to the connecting rod, and in the case of power failure, the fixing module is separated from the connecting rod through the separation module to achieve the separation of the multiple foldable airbags in the inflated state;

[0012] The sleeve is used to fix the foldable airbag, is arranged between the disc cavitator and the end surface of the vehicle, and can be broken under a certain pressure;

[0013] The chassis is arranged in the navigation body and can move axially relative to the navigation body, and a buffer module is provided between the chassis and the navigation body to absorb compression energy;

[0014] The pressure detection unit is used to monitor the water inlet pressure of the disc cavitator. When the set value is reached, the control device controls the gas generating device and the electromagnet through timing, generates gas through the gas generating device to inflate the foldable airbag, and controls the electromagnet to cut off the power to realize the separation of the foldable airbag in the inflated state.

[0015] An external airbag-type combined load-reducing device for high-speed water entry of a navigation body, wherein the load-reducing method includes:

[0016] Stage 1: The disc cavitator touches the water first, and under the axial force, it quickly shrinks into the vehicle body and compresses the sleeve. At this time, the sleeve is crushed by pressure. The disc cavitator transmits the axial force to the chassis through the connecting rod and compresses the buffer module. The buffer module compresses and absorbs energy. The pressure detection unit detects that the pressure signal reaches the set value and transmits the signal to the control device to inflate the foldable airbag. Stage 2: The sleeve is completely crushed under the action of the compression of the disc cavitator and the inflation of the foldable airbag. The foldable airbag is fully unfolded and contacts the liquid. At this moment, the fixed module is stuck at the disc cavitator and the end face of the vehicle body, which plays an axial limiting role on the disc cavitator. Stage 3: The control device controls the fixed module to lose its magnetic attraction and lose its function. The disc cavitator contacts the front face of the vehicle body, the buffer module is compressed to the limit, and the vehicle body enters the stable navigation stage.

[0017] Compared with the prior art, the present invention has the following significant advantages:

[0018] (1) The present invention provides an external airbag-type combined load-reducing device for a navigation body to enter water at high speed. The device is simple and reliable. The disc cavitator and the cylindrical rod of the retractable load-reducing rod are easy to disassemble and assemble, and are convenient for replacing the power supply and the reactants in the gas generator; the buffer module does not need to be frequently replaced and can be recycled many times; the foldable airbag can maintain the integrity of the structure under strong impact loads and give full play to the load-reducing capacity. After leaving the navigation body, it can float to the water surface due to the buoyancy and can be recycled together with the fixed module.

[0019] (2) The present invention overcomes the drawbacks of conventional airbags, which have limited load-reducing capabilities on the head of a vehicle, affecting the stability of the vehicle's underwater trajectory and interfering with the vehicle's normal trajectory. The axial force generated by the structure during entry into the water is not directly transmitted to the vehicle, but is further reduced through the buffer module. The airbag load-reducing device is locked by the fixed module and deployed on the side wall of the cylindrical rod to exert a load-reducing effect. The fixed module is indirectly controlled by the charge and discharge of the electromagnet to achieve controllable separation of the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional view of the external airbag-type combined load reduction structure for the navigation body entering the water at high speed;

[0021] Figure 2 1. It is a schematic diagram of the structure of the telescopic load-reducing rod;

[0022] Figure 3 This is a cross-sectional view of the external airbag-type combined load-reducing structure of the navigation body entering the water at high speed;

[0023] Figure 4 This is a second sectional view of the external airbag-type combined load-reducing structure of the navigation body entering the water at high speed;

[0024] Figure 5 yes Figure 4 Middle AA section view;

[0025] Figure 6 It is a three-section view of the external airbag-type combined load-reducing structure of the navigation body entering the water at high speed during the water entry phase. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1 As shown, an external airbag-type combined load-reducing device for high-speed water entry of a navigation body in this embodiment mainly includes a retractable load-reducing rod 1, an airbag load-reducing device and a buffer module 9.

[0028] The retractable load-reducing rod 1 comprises a disc cavitator 2, a cylindrical rod 3, and a chassis 4. The disc cavitator 2 and cylindrical rod 3 are detachably connected, and the cylindrical rod 3 and chassis 4 are connected via threads 18. A pressure sensor 12 is mounted at the bottom of the disc cavitator 2, and a cavity is provided within the cylindrical rod 3 for mounting an electromagnet 13, a power supply 11, a switch 10, a gas generator 15, and a gas control device 16. The power supply 11 is connected to the gas generator 15 and the gas control device 16, supplying power to the gas generator 15 and the gas control device 16. The power supply 11 is connected to the electromagnet 13 via the switch 10, which is normally closed (e.g., an electronic switch such as a relay). The electromagnet 13 is used to magnetically attract and fix the module 6. The gas control device 16 is used to control the gas generator 15 to generate high-pressure gas for inflating the foldable airbag 7 and to control the on / off state of the switch.

[0029] The airbag load-reducing device includes a collapsible airbag 7, a gas generator 15, an inflation duct 14, and a sleeve 5. The multiple collapsible airbags 7 are made of strong nylon and positioned between the outer wall of a cylindrical rod 3 and the inner wall of the sleeve 5, ensuring structural integrity under strong impact loads. The collapsible airbags 7 are secured by a fixing module 6 embedded in a groove 17 of the cylindrical rod 3. A release spring is located within the groove 17 of the cylindrical rod 3. An electromagnet 13 is connected to the collapsible airbag 7. The electromagnet 13's suction compresses the release spring, which is embedded within the groove 17. When the electromagnet 13's magnetic force dissipates, the release spring pushes the fixing module 6 out of the groove 17 and away from the cylindrical rod 3. The fixing module is constructed from two pieces of magnetized ultra-high-strength steel.

[0030] The inflation pipe 14 connects the gas generator 15 and the foldable airbag 7, passes through the fixed module 6, and connects the two sections of the inflation pipe; the sleeve 5 is arranged on the surface of the foldable airbag 7, and its two ends are stuck between the bottom surface of the disc cavitator 2 and the end surface of the navigation body 8. The material is a polyester resin-based composite material.

[0031] The buffer module 9 is filled in the stepped hole of the navigation body 8 and contacts the chassis 4. The chassis 4 can move axially inside the navigation body 8. The buffer module 9 is made of a carbon fiber corrugated honeycomb structure.

[0032] The specific implementation process is as follows: the process of the navigation body entering the water at high speed can be divided into three stages: Stage 1: Figure 3 As shown, the disc cavitator 2 first touches the water and shrinks rapidly into the navigation body 8 under the axial force, compressing the sleeve 5. At this time, the sleeve 5 is crushed by the pressure. The disc cavitator 2 transmits the axial force to the chassis 4 through the cylindrical rod 3 and compresses the buffer module 9. The buffer module 9 absorbs the energy by compression. The pressure sensor 12 detects that the pressure signal reaches the set value and transmits the signal to the gas control device 16. Then the gas generator 15 works to generate a large amount of high-temperature and high-pressure gas, which inflates the foldable airbag 7 through the inflation pipe 14. Stage 2: As shown in FIG. Figure 4 As shown, the sleeve 5 is completely broken under the action of the compression of the disc cavitator 2 and the inflation of the foldable airbag 7. The foldable airbag 7 is fully unfolded and in contact with the liquid. At this moment, the fixing module 6 is stuck at the end surface of the disc cavitator 2 and the navigation body 8, and plays an axial limit role on the load reduction rod 1. The load reduction rod 1 cannot be retracted, and the foldable airbag 7 can fully play its role. Stage three: As shown in FIG. Figure 6 As shown, the electromagnet 13 receives the control instruction of the gas control device 16 and is powered off, the fixing module 6 loses its magnetic attraction and becomes ineffective, the airbag 7 is in a circular shape and is affected by buoyancy, and the navigation body is affected by inertia and the two begin to separate, the load-reducing rod 1 continues to be compressed until the disc cavitator 2 contacts the front end surface of the navigation body 8, the buffer module 9 is compressed to the limit, and the navigation body enters the stable navigation stage.

[0033] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A combined load-reducing device with an external airbag for high-speed water entry of a navigation body, characterized in that: include: The disc cavitator serves as the contact part between the vehicle and the water when the vehicle enters the water; A connecting rod, the two ends of which are connected to the disc cavitator and the chassis respectively, and are used to install the gas generating device, the control device and the electromagnet; A foldable airbag is provided between the outer wall of the connecting rod and the sleeve, and can be inflated and expanded to reduce the load when the gas generating device is activated; The fixing module is used to connect the foldable airbag, is embedded in the connecting rod and has a separation module between the connecting rod and the connecting rod, and can limit the position of the connecting rod after contraction; The electromagnet is used to attract the fixing module under the action of magnetic force to connect the fixing module to the connecting rod, and in the case of power failure, the fixing module is separated from the connecting rod through the separation module to achieve the separation of the multiple foldable airbags in the inflated state; The sleeve is used to fix the foldable airbag, is arranged between the disc cavitator and the end surface of the vehicle, and can be broken under a certain pressure; The chassis is arranged in the navigation body and can move axially relative to the navigation body, and a buffer module is provided between the chassis and the navigation body to absorb compression energy; The pressure detection unit is used to monitor the water inlet pressure of the disc cavitator. When the set value is reached, the control device controls the gas generating device and the electromagnet through timing, generates gas through the gas generating device to inflate the foldable airbag, and controls the electromagnet to cut off the power to realize the separation of the foldable airbag in the inflated state.

2. The external airbag-type combined load-reducing device for high-speed water entry of a navigation body according to claim 1 is characterized in that: The fixing module is embedded in the groove of the connecting rod. A separation spring is provided in the groove of the connecting rod as a separation module. Under the action of the electromagnet suction, the separation spring is compressed and embedded in the groove. After the magnetic force of the electromagnet disappears, the separation spring pushes the fixing module out of the groove and separates it from the connecting rod.

3. The external airbag-type combined load-reducing device for high-speed water entry of a navigation body according to claim 1 is characterized in that: The control device is connected to the electromagnet via a switch, and the switch is in a normally closed state.

4. The external airbag-type combined load-reducing device for high-speed water entry of a navigation body according to claim 1 is characterized in that: The gas generating device comprises a gas generator and an inflation pipe; the inflation pipe connects the gas generator and the foldable airbag.

5. The external airbag-type combined load-reducing device for high-speed water entry of a navigation body according to claim 1 is characterized in that: A pressure sensor is installed at the bottom of the disc cavitator as a pressure detection unit.

6. The external airbag-type combined load-reducing device for high-speed water entry of a navigation body according to claim 1 is characterized in that: The connecting rod is a cylindrical rod structure.

7. The external airbag-type combined load-reducing device for high-speed water entry of a navigation body according to claim 1 is characterized in that: The connecting rod and the chassis are connected via threads.

8. The method for unloading a vehicle by means of an external airbag-type combined unloading device for high-speed water entry according to any one of claims 1 to 7, characterized in that: include: Stage 1: The disc cavitator touches the water first, and under the axial force, it quickly shrinks into the vehicle body and compresses the sleeve. At this time, the sleeve is crushed by pressure. The disc cavitator transmits the axial force to the chassis through the connecting rod and compresses the buffer module. The buffer module compresses and absorbs energy. The pressure detection unit detects that the pressure signal reaches the set value and transmits the signal to the control device to inflate the foldable airbag. Stage 2: The sleeve is completely crushed under the action of the compression of the disc cavitator and the inflation of the foldable airbag. The foldable airbag is fully unfolded and contacts the liquid. At this moment, the fixed module is stuck at the disc cavitator and the end face of the vehicle body, which plays an axial limiting role on the disc cavitator. Stage 3: The control device controls the fixed module to lose its magnetic attraction and lose its function. The disc cavitator contacts the front face of the vehicle body, the buffer module is compressed to the limit, and the vehicle body enters the stable navigation stage.

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