Ejection buffering device based on porous metal filled with fire-resistant hydraulic oil

Abstract

The invention relates to an ejection buffering device based on porous metal filled with fire-resistant hydraulic oil, and belongs to the technical field of ejection of ejection bodies. The ejection recoil force is reduced through plastic deformation in the porous metal crushing process and viscous friction of hydraulic oil passing through the damping holes, and the ejection buffering effect is achieved. The device is simple in structure, low in requirement for the ground, high in ground adaptability, capable of effectively buffering ejection loads and bearing high-temperature fuel gas and free of obvious influence on an ejected body and an ejection platform. And the rapid reaction capability of emission can be effectively improved, so that the survival capability is improved.

Description

Technical Field

[0001] The present invention relates to an ejection buffer device based on porous metal filled with fire-resistant hydraulic oil, belonging to the technical field of ejection body launching. Background Art

[0002] Existing ejection load buffer devices include rubber base hanging ejection buffer devices, flexible airbag ejection buffer devices, telescopic cylinder ejection buffer devices, etc. The rubber base hanging ejection fully contacts the ground through the deformation of the rubber base at the bottom of the launch tube, increasing the contact area to buffer the ejection load. The flexible airbag ejection buffers the ejection load by increasing the boundary of the flexible cylinder, making the expansion working distance of the compressed gas longer. The telescopic cylinder ejection buffers the ejection load by nesting an inner cylinder in an outer cylinder, and the inner cylinder extends during ejection to make the expansion working distance of the compressed gas longer.

[0003] Although the above three ejection buffer devices can buffer the ejection load, they also have deficiencies. The rubber base hanging ejection only increases the contact area between the launch tube and the ground, and the effect of buffering the ejection load is not obvious. During the flexible airbag ejection process, the flexible airbag is difficult to withstand high-temperature gas, so only a compressed gas cylinder can be used as the power source. When the ejection mass is large, the volume of the compressed gas will increase significantly, which is not conducive to production and installation. During the telescopic cylinder ejection process, the braking and blocking of the inner cylinder after elongation have not been well solved, which may affect the attitude of the ejected body.

[0004] Therefore, in view of the deficiencies of existing various ejection buffer devices, there is an urgent need to develop a new type of ejection buffer device that can effectively buffer the ejection load, withstand high-temperature gas, and have no impact on the ejected body and the launch platform. Summary of the Invention

[0005] To solve the above problems, the present invention provides an ejection buffer device based on porous metal filled with fire-resistant hydraulic oil.

[0006] The technical solution of the present invention is as follows:

[0007] An ejection load device based on porous metal filled with fire-resistant hydraulic oil, including a launch tube 12, a buffer tube 10, a porous metal block 1, and an ejection power source 8;

[0008] The pores of the porous metal block 1 are filled with fire-resistant hydraulic oil;

[0009] The bottom of the buffer tube 10 is provided with damping holes 2;

[0010] The top of the buffer tube 10 is provided with a top cover 11, and there is a sealing ring 5 between the top cover 11 and the body of the buffer tube 10;

[0011] The buffer cylinder 10 is installed at the bottom of the launch tube 12, and the buffer cylinder 10 is limited by a directional stop block 13;

[0012] The bottom of the launch tube 12 is provided with a drain hole 4, and a frangible cover 3 is provided at the drain hole 4;

[0013] The damping holes 2 at the bottom of the buffer cylinder 10 are aligned with the drain holes 4 at the bottom of the launch tube 12 one by one. The fire-resistant hydraulic oil in the holes of the porous metal block 1 squeezes the frangible cover 3 after passing through the damping holes 2 at the bottom of the buffer cylinder 10. After the frangible cover 3 is broken, the fire-resistant hydraulic oil is discharged through the drain holes 4 at the bottom of the launch tube 12;

[0014] The bottom of the projectile 14 is provided with a tail cover 9. The projectile 14 and the tail cover 9 are both installed in the launch tube 12, and the tail cover 9 is limited by a directional stop block 13. The projectile 14 is guided by an adapter 15 so that the projectile 14 can be launched along the axis of the launch tube 12;

[0015] The ejection power source 8 is fixedly installed in the launch tube 12 through a propellant holder 6 and is located between the buffer cylinder 10 and the projectile 14;

[0016] A cavity is formed between the inner walls of the tail cover 9, the buffer cylinder 10 and the launch tube 12, and this cavity is defined as a low-pressure chamber;

[0017] An ejection buffering method for an ejection buffering device based on filling a porous metal with fire-resistant hydraulic oil includes the following steps:

[0018] S1, fully fill the porous metal block with fire-resistant hydraulic oil, assemble the processed components, and check the effectiveness of the sealing ring and the frangible cover;

[0019] S2, fix the ejection power source in the launch tube 12 through a propellant holder, and load the projectile, the tail cover and the adapter into the launch tube, and ignite for an ejection buffering test;

[0020] S3, ignite the ejection power source. The ejection power source releases a large amount of gas into the low-pressure chamber. The gas pushes the tail cover and the projectile to accelerate and eject outwards along the launch tube. At the same time, it pushes the top cover to crush the porous metal block and compress the filled hydraulic oil. The pressure of the hydraulic oil rises to break the frangible cover, and it is discharged through the damping holes and the drain holes;

[0021] S4, record the crushing state of the porous metal, the discharge state of the hydraulic oil, the pressure of the low-pressure chamber, and the displacement, speed and acceleration changes of the projectile.

[0022] Adopting the above technical solution, the present invention has the following advantages:

[0023] The present invention provides an ejection buffer device based on a porous metal filled with fire-resistant hydraulic oil, which reduces the ejection recoil force through the plastic deformation during the crushing process of the porous metal and the viscous friction of the hydraulic oil passing through the damping holes, achieving the effect of ejection buffering. It has low requirements for the ground, strong ground adaptability, can effectively buffer the ejection load, withstand high-temperature gas, and will not have an obvious impact on the ejected object and the launch platform. It can effectively improve the rapid response ability of the launch, thereby enhancing the survival ability.

[0024] The present invention discloses an ejection buffer device based on a porous metal filled with fire-resistant hydraulic oil, which includes a porous metal filled with fire-resistant hydraulic oil, damping holes, a fragile cover, drain holes, sealing rings, a charge holder, a low-pressure chamber, an ejection power source, a tail cover, a buffer cylinder, a top cover, a launch tube, a directional stop, an ejected object, and an adapter. Among them: a porous metal filled with fire-resistant hydraulic oil is placed inside the buffer cylinder; there are damping holes sealed by a fragile cover at the bottom, and drain holes at the bottom of the launch tube. Under the constraint of the directional stop, the damping holes and the drain holes are aligned and assembled; a top cover and a sealing ring are installed at the top; the ejection power source is fixed above the buffer cylinder through the charge holder; the tail cover is installed above the ejection power source under the constraint of the directional stop of the ejected object. During ejection, the ejection recoil force is reduced through the plastic deformation during the crushing process of the porous metal and the viscous friction of the hydraulic oil passing through the damping holes, achieving the effect of ejection buffering. Brief Description of the Drawings

[0025] Figure 1 It is a schematic cross-sectional view of the overall structure of an ejection buffer device based on a porous metal filled with fire-resistant hydraulic oil according to the present invention;

[0026] Figure 2 It is a schematic cross-sectional view of the process of the porous metal being crushed, the hydraulic oil being discharged, and the ejected object being ejected during the ejection process of the present invention.

[0027] Reference Signs: 1 - porous metal block, 2 - damping hole, 3 - fragile cover, 4 - drain hole, 5 - sealing ring, 6 - charge holder, 7 - low-pressure chamber, 8 - ejection power source, 9 - tail cover, 10 - buffer cylinder, 11 - top cover, 12 - launch tube, 13 - directional baffle, 14 - ejected object, 15 - adapter, 16 - low-pressure chamber with increased volume during the ejection process, 17 - crushed porous metal, 18 - hydraulic oil discharged through the damping holes and drain holes, 19 - ejected ejected object.

[0028] The directional stop 13 is fixed to the inner bottom of the launch tube 12 and a certain distance above the buffer tube 10 by means such as screwing or welding. The outer bottom of the buffer tube 10 is fixed to the inner bottom of the launch tube 12 by bolts. The damping holes 2 at the bottom of the buffer tube 10 are sealed by installing a frangible cover 3. The drain hole 4 at the bottom of the launch tube 12 is aligned and assembled with the damping hole 2 under the constraint of the directional stop 13. The porous metal 1 filled with fire-resistant hydraulic oil is placed inside the buffer tube 10. The top cover 11 is fitted and installed on the top of the buffer tube 10, and a sealing ring 5 is extruded and filled at the gap. The solid charge holder 6 is connected to the ejection power source 8 on one side and the inner surface of the launch tube 12 on the other side, fixing the ejection power source 8 in the low-pressure chamber 7. The tail cover 9 is placed on the top of the directional stop 13. The projectile 14 is placed on the top of the tail cover 9. A number of adapters 15 are placed between the outer surface of the projectile 14 and the inner surface of the launch tube 12 after pre-tightening.

[0029] The pores inside the porous metal are interconnected to form a continuous three-dimensional porous structure. This structure has good permeability, and fluids can flow naturally between the pores.

[0030] Fire-resistant hydraulic oil is a hydraulic medium with fire-resistant properties, and has properties similar to mineral oil such as appropriate viscosity, good lubricating properties, high viscosity index and good chemical stability.

[0031] The top cover and the sealing ring are used to prevent the liquid from flowing out during transportation and ejection.

[0032] The low-pressure chamber is the area between the inner wall of the launch tube, the outer wall of the buffer tube, the top cover and the tail cover. The ejection power source releases gas to fill the entire low-pressure chamber during ejection.

[0033] The adapter ensures that the projectile moves along the axial direction of the launch tube.

[0034] An ejection buffering method for an ejection buffering device based on porous metal filled with fire-resistant hydraulic oil includes the following steps:

[0035] S1. Assembly and preparation of the ejection buffering device based on porous metal filled with fire-resistant hydraulic oil;

[0036] S2. Use of the ejection buffering device based on porous metal filled with fire-resistant hydraulic oil;

[0037] As an aspect of the ejection buffering method for an ejection buffering device based on porous metal filled with fire-resistant hydraulic oil of the present invention, the S1 includes the following steps:

[0038] S11. Determine the buffering requirement parameters of the ejection buffering device based on porous metal filled with fire-resistant hydraulic oil according to the ejection performance index;

[0039] S12. Determine the characteristic parameters of the porous metal such as the type, size, yield strength, etc., the characteristics of the fire-resistant hydraulic oil such as the type, composition, viscosity index, etc., the size and number of damping holes, and design components such as the buffer cylinder, top cover, and sealing ring in a matching manner to ensure reasonable installation dimensions;

[0040] S13. Fully fill the fire-resistant hydraulic oil into the porous metal, assemble the processed components, and check the effectiveness of the sealing ring;

[0041] S14. Fix the ejection power source in the low-pressure chamber through a solid medicine device, load the ejected object, tail cover, and adapter into the launch tube, and ignite for an ejection buffering test;

[0042] S15. During ejection, the ejection power source releases a large amount of gas into the low-pressure chamber. The gas pushes the tail cover and the ejected object to accelerate and eject outward along the launch tube. At the same time, it pushes the top cover to crush the porous metal and compress the hydraulic oil filled inside. The increased pressure of the hydraulic oil causes the fragile cover to break and discharge through the damping holes and drain holes.

[0043] S16. Monitor the crushing state of the porous metal, the discharge state of the hydraulic oil, the pressure in the low-pressure chamber, and the changes in the displacement, velocity, and acceleration of the ejected object.

[0044] As one aspect of the ejection buffering method of the ejection buffering device based on a fire-resistant hydraulic oil-filled porous metal of the present invention, the S2 includes the following steps:

[0045] S21. If the crushing state of the porous metal is abnormal, the fragile cover fails to break smoothly, the hydraulic oil fails to be discharged smoothly, or the pressure in the low-pressure chamber and the changes in the displacement, velocity, and acceleration of the ejected object are abnormal, repeat the S1 steps until all performance indicators meet the expected requirements.

[0046] S22. Load the ejected object, tail cover, and adapter into the launch tube, ignite for an ejection buffering test, and obtain various states and data.

[0047] S23. Return to the factory to remove the crushed porous metal, clean the hydraulic oil, damping holes, and drain holes. Install a new porous metal and fill it with hydraulic oil, and install the top cover, sealing ring, and fragile cover. Restore the tail cover and the ejected object to their initial positions to complete all processes of this launch mission. Embodiment

[0048] As Figure 1 and Figure 2 shown, an ejection load device based on a fire-resistant hydraulic oil-filled porous metal includes a launch tube 12, a buffer cylinder 10, a porous metal block 1, and an ejection power source 8;

[0049] The holes of the porous metal block 1 are filled with fire-resistant hydraulic oil;

[0050] The bottom of the buffer cylinder 10 is provided with damping holes 2;

[0051] The top of the buffer cylinder 10 is provided with a top cover 11, and there is a sealing ring 5 between the top cover 11 and the body of the buffer cylinder 10;

[0052] The buffer cylinder 10 is installed at the bottom of the launch tube 12, and the buffer cylinder 10 is limited by a directional stop block 13;

[0053] The bottom of the launch tube 12 is provided with a drain hole 4, and a frangible cover 3 is provided at the drain hole 4;

[0054] The damping holes 2 at the bottom of the buffer cylinder 10 are aligned with the drain holes 4 at the bottom of the launch tube 12 one by one. The fire-resistant hydraulic oil in the holes of the porous metal block 1 passes through the damping holes 2 at the bottom of the buffer cylinder 10 and then squeezes the frangible cover 3. After the frangible cover 3 is broken, the fire-resistant hydraulic oil is discharged through the drain holes 4 at the bottom of the launch tube 12;

[0055] The bottom of the projectile 14 is provided with a tail cover 9. The projectile 14 and the tail cover 9 are both installed in the launch tube 12, and the tail cover 9 is limited by a directional stop block 13. The projectile 14 is guided by an adapter 15, so that the projectile 14 can be launched along the axial direction of the launch tube 12;

[0056] The ejection power source 8 is fixedly installed in the launch tube 12 through a propellant holder 6 and is located between the buffer cylinder 10 and the projectile 14;

[0057] A cavity is formed between the inner walls of the tail cover 9, the buffer cylinder 10 and the launch tube 12, and this cavity is defined as a low-pressure chamber 7;

[0058] An ejection buffering method for an ejection buffering device based on filling a porous metal with fire-resistant hydraulic oil includes the following steps:

[0059] S1, fully fill the porous metal block with fire-resistant hydraulic oil, assemble the processed components, and check the effectiveness of the sealing ring and the frangible cover;

[0060] S2, fix the ejection power source in the launch tube 12 through a propellant holder, and load the projectile, the tail cover and the adapter into the launch tube, and ignite for an ejection buffering test;

[0061] S3, ignite the ejection power source. The ejection power source releases a large amount of gas into the low-pressure chamber. The gas pushes the tail cover and the projectile to accelerate and eject outward along the launch tube. At the same time, it pushes the top cover to crush the porous metal block and compress the filled hydraulic oil. The pressure of the hydraulic oil rises to break the frangible cover, and it is discharged through the damping holes and the drain holes;

[0062] 16 - Low-pressure chamber with increased volume during the ejection process, 17 - Crushed porous metal, 18 - Hydraulic oil discharged through the damping hole and the drain hole, 19 - Ejected object to be ejected.

[0063] During the ejection process, the ejection power source 8 continuously releases gas outward. The pressure generated by the gas acts on the top cover 11 and the tail cover 9, pushing the top cover 11 and the tail cover 9 to move, forming a low-pressure chamber 16 with a continuously increasing volume; the top cover 11 moves axially along the buffer cylinder 10 and towards the bottom of the buffer cylinder 10, forming the crushed porous metal 17 and generating the hydraulic oil 18 discharged through the damping hole and the drain hole at the bottom of the launch tube 12; the tail cover 9 pushes the ejected object to be ejected 19 to move axially along the launch tube 12 and towards the mouth of the launch tube 12.

[0064] S4, record the crushing state of the porous metal, the discharge state of the hydraulic oil, the pressure of the low-pressure chamber, and the displacement, velocity, and acceleration changes of the object to be ejected.

[0065] If during the ejection process, the top cover 11 does not touch the bottom of the buffer cylinder 10, that is, a small amount of porous metal remains uncrushed, the hydraulic oil is discharged smoothly without blockage, and the pressure of the low-pressure chamber and the displacement, velocity, and acceleration changes of the object to be ejected are normal and meet the index requirements, then the ejection buffer test is successful.

[0066] In summary, the above is only a preferred embodiment of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ejection load device based on a porous metal filled with fire-resistant hydraulic oil, characterized in that: The ejection load device includes a launch tube, a buffer tube, a porous metal block, and an ejection power source; The pores of the porous metal block are filled with fire-resistant hydraulic oil; The bottom of the buffer tube is provided with damping holes; The top of the buffer tube is provided with a top cover; The buffer tube is installed at the bottom of the launch tube; The bottom of the launch tube is provided with drain holes; The damping holes at the bottom of the buffer tube are aligned with the drain holes at the bottom of the launch tube one by one. The fire-resistant hydraulic oil in the pores of the porous metal block squeezes the fragile cover after passing through the damping holes at the bottom of the buffer tube. After the fragile cover breaks, the fire-resistant hydraulic oil is discharged through the drain holes at the bottom of the launch tube; The bottom of the ejected object is provided with a tail cover. The ejected object and the tail cover are both installed in the launch tube. The ejected object is guided by an adapter so that the ejected object can be launched along the axis of the launch tube; The ejection power source is fixedly installed in the launch tube through a propellant holder and is located between the buffer tube and the ejected object.

2. The ejection load device based on a porous metal filled with fire-resistant hydraulic oil according to claim 1, characterized in that: There is a sealing ring between the top cover and the buffer tube body.

3. The ejection load device based on a porous metal filled with fire-resistant hydraulic oil according to claim 1, characterized in that: The buffer tube is limited by a directional stop block.

4. The ejection load device based on a porous metal filled with fire-resistant hydraulic oil according to claim 1, characterized in that: The drain hole is provided with a fragile cover, which breaks during launch.

5. The ejection load device based on a porous metal filled with fire-resistant hydraulic oil according to claim 1, characterized in that: The tail cover is limited by a directional stop block.

6. The ejection load device based on a porous metal filled with fire-resistant hydraulic oil according to claim 1, characterized in that: A cavity is formed between the inner walls of the tail cover, the buffer tube, and the launch tube, and this cavity is defined as a low-pressure chamber.

7. A catapult buffering method for a catapult buffering device based on a porous metal filled with fire-resistant hydraulic oil, characterized in that The steps of this method include: S1, fully filling the porous metal block with fire-resistant hydraulic oil, assembling the processed components, and checking the effectiveness of the sealing ring and the fragile cover; S2, fixing the ejection power source in the launch tube through a propellant holder, loading the ejected object, the tail cover, and the adapter into the launch tube, and igniting for an ejection buffer test; S3, igniting the ejection power source. The ejection power source releases a large amount of gas into the low-pressure chamber. The gas pushes the tail cover and the ejected object to accelerate and eject outward along the launch tube. At the same time, it pushes the top cover to crush the porous metal block and compress the filled hydraulic oil. The pressure of the hydraulic oil rises to cause the fragile cover to break and is discharged through the damping holes and the drain holes; S4, recording the crushing state of the porous metal, the discharge state of the hydraulic oil, the pressure in the low-pressure chamber, and the displacement, speed, and acceleration changes of the ejected object.

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