Dynamic Stabilization Device for Liquid Rocket Propellant Refueling during Offshore Launch

Abstract

The present invention belongs to the technical field of liquid rockets, and specifically is a dynamic stabilization device for liquid rockets launched at sea and filled with propellants, comprising a storage part, a collection mechanism, a damping mechanism and an auxiliary mechanism; the storage part comprises a storage tank and a closing plate, and the closing plate is detachably mounted on the upper end of the storage tank; the collection mechanism comprises a buoyancy plate, a connecting tube and a sliding rod, the bottom of the connecting tube is fixedly connected to the upper end surface of the buoyancy plate, and the sliding rod is slidably arranged in the inner cavity of the connecting tube; the damping mechanism comprises a mounting frame, a magnetic block and a transmission plate, the transmission plate is a metal conductor plate, the mounting frame is rotatably mounted on the bottom surface of the closing plate, the magnetic block is fixedly mounted on the outer wall of the mounting frame, and two magnetic blocks are arranged, and the magnetic poles of the ends of the two magnetic blocks that are close to each other are opposite; the fluctuation energy is absorbed by the change of buoyancy, thereby reducing the amplitude of liquid surface shaking, preventing the frequency of liquid surface shaking from being the same as the frequency of storage tank shaking, thereby achieving the effect of shock absorption and improving stability.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid rockets, specifically a dynamic stability device for filling propellants during the sea launch of liquid rockets. Background Art

[0002] With the increasing carrying capacity of launch vehicles, the service life of satellites, and the complexity of deep space exploration missions, the proportion of liquid propellants in the total mass of spacecraft has also increased. However, the fluctuations of liquid propellants significantly affect the motion stability of spacecraft and the reliability of attitude and orbit control systems.

[0003] For example, the invention patent with the publication number CN116238722A discloses a sloshing dynamic stability device for filling propellants in a sea-launched liquid rocket, including a spherical tank for storing propellants. The upper and lower ends of the spherical tank are provided with inlet and outlet pipelines equipped with valves. The outer surface of the middle part of the spherical tank is provided with a clamping ring adapted to the outer surface of the spherical tank. The outer surface of the clamping ring is fixedly installed with outwardly supporting support legs, and the inner wall of the clamping ring is provided with rolling balls that are in rolling connection with the outer surface of the spherical tank. This technology can place the spherical tank filled with propellants on the support legs in the air, avoiding the problem that the spherical tank will shake with the ship after being directly installed on the ship. By setting an arc-shaped buffer mechanism, on the one hand, it can prevent the sudden shaking of the spherical tank, and on the other hand, it can prevent the problem that when the shaking amplitude of the spherical tank is too large, the spherical tank will drive the propellants to shake greatly when it suddenly returns to its position.

[0004] Although the above technology prevents the spherical tank from shaking through external support, when the ship sails at sea, it will not only cause the spherical tank to shake, but also drive the liquid inside the spherical tank to shake. When the shaking frequency of the liquid is the same as that of the spherical tank, it is extremely easy for the spherical tank to be affected by the liquid surface shaking and cause the spherical tank to tip over. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art, the present invention provides a dynamic stability device for filling propellants during the sea launch of liquid rockets.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a dynamic stability device for filling propellants during the sea launch of liquid rockets, including a storage part, a collection mechanism, a damping mechanism, and an auxiliary mechanism;

[0007] The storage part includes a storage tank and a closing plate, and the closing plate is detachably installed at the upper end of the storage tank;

[0008] The collection mechanism includes a buoyancy plate, a connecting cylinder, and a sliding rod. The bottom of the connecting cylinder is fixedly connected to the upper end surface of the buoyancy plate, and the sliding rod is slidably arranged in the inner cavity of the connecting cylinder;

[0009] The damping mechanism includes a mounting bracket, magnetic blocks, and a transmission plate. The transmission plate is a metal conductor plate. The mounting bracket is rotatably mounted on the bottom surface of the closing plate. The magnetic blocks are fixedly mounted on the outer wall of the mounting bracket and there are two of them. The opposite ends of the two magnetic blocks that are close to each other have opposite magnetic poles.

[0010] One end of the sliding rod is rotatably connected to the mounting bracket. The transmission plate is located between the two magnetic blocks and is fixedly connected to the sliding rod.

[0011] The auxiliary mechanism includes a storage cylinder and a control board. The storage cylinder is filled with damping fluid. The control board is slidably mounted on the inner wall of the storage cylinder, and through holes for the damping fluid to pass through are provided on the outer wall.

[0012] The sliding of the control board is controlled by the sliding of the mounting bracket.

[0013] Preferably, a transmission shaft is rotatably mounted on the inner wall of the storage cylinder, and a connecting shaft connected to the transmission shaft is fixedly mounted on the upper end surface of the mounting bracket.

[0014] A circulation groove is provided on the radial outer wall of the transmission shaft. The control board is sleeved on the outer wall of the transmission shaft, and a transmission ball is fixedly mounted on the inner wall of the control board. The outer wall of the transmission ball is slidably fitted with the inner wall of the circulation groove.

[0015] A transmission piece is fixedly mounted on the bottom surface of the buoyancy plate.

[0016] Preferably, a heat preservation cylinder is fixedly mounted on the upper end surface of the closing plate, and the heat preservation cylinder is sleeved on the outer wall of the storage cylinder.

[0017] A temperature control cylinder is fixedly mounted on the upper end surface of the closing plate. A rotating shaft is rotatably mounted at the axial end of the temperature control cylinder, and a control piece is fixedly mounted on the outer wall of the rotating shaft.

[0018] The control piece has a cold end and a hot end.

[0019] The inner cavity of the temperature control cylinder is in communication with the inner cavity of the heat preservation cylinder.

[0020] Preferably, a support cylinder is fixedly mounted on the upper end surface of the closing plate, and a guide fan is fixedly mounted in the inner cavity of the support cylinder.

[0021] One end of the support cylinder is fixedly connected to the outer wall of the heat preservation cylinder through a conduit, and the other end of the support cylinder is connected to the temperature control cylinder through a conduit.

[0022] Preferably, a guide plate is fixedly mounted on the radial outer wall of the storage cylinder, and the guide plate is spirally distributed on the inner wall of the heat preservation cylinder.

[0023] A through hole for exhausting gas is provided at the upper end of the heat preservation cylinder.

[0024] Heat conducting sheets are fixedly mounted on the outer wall of the control piece, and a plurality of heat conducting sheets are uniformly arranged along the outer wall of the control piece.

[0025] Preferably, a control cylinder is fixedly installed on the upper end surface of the closing plate, a control shaft is rotatably installed on the inner wall of the control cylinder, and one end of the control shaft extends to the outer wall of the control cylinder and is fixedly connected to the central position of the axial end of the rotating shaft.

[0026] Preferably, a control ring is elastically installed in the inner cavity of the control cylinder, and the inner wall of the control ring is slidably attached to the radial outer wall of the control shaft;

[0027] A spiral groove is formed on the radial outer wall of the control shaft, a transmission block is fixedly installed on the inner wall of the control ring, and the outer wall of the transmission block is slidably attached to the inner wall of the spiral groove.

[0028] Preferably, a control plug is slidably installed on the inner wall of the control cylinder, and the outer wall of the control plug is hermetically attached to the inner wall of the control cylinder;

[0029] A transmission cylinder is rotatably installed at the axial end of the control plug, and the other end of the transmission cylinder is rotatably connected to the axial end of the control ring.

[0030] Preferably, a guide rod is fixedly installed on the inner wall of the control cylinder, and the outer wall of the control ring is slidably attached to the outer wall of the guide rod;

[0031] A heat exchange plate is fixedly installed on the outer wall of the control cylinder, one end of the heat exchange plate extends into the inner cavity of the control cylinder, and a plurality of heat exchange plates are arranged in a ring along the axis of the control cylinder.

[0032] The beneficial effects of the present invention are as follows:

[0033] 1. By setting a buoyancy plate in the present invention, the buoyancy plate floats on the liquid surface. When the liquid shakes, the floating ball will move accordingly, and the fluctuating energy is absorbed through the change of buoyancy, thereby reducing the amplitude of the liquid surface shake and preventing the frequency of the liquid surface shake from being the same as the frequency of the storage tank shake, so as to achieve the effect of shock absorption and improve stability. At the same time, a magnetic block and a transmission plate are set. The transmission plate is located between the two magnetic blocks and is fixedly connected to the sliding rod. When the liquid level in the storage tank fluctuates, the buoyancy plate moves synchronously, thereby driving the sliding rod to shake. At this time, the sliding rod slides, driving the transmission plate to move between the two magnetic blocks, and the kinetic energy of the transmission plate shake is consumed through the Ampere force, thereby improving the buffering effect and the stability of the overall storage device;

[0034] 2. The present invention is provided with a control cylinder, and a control plug is slidably installed on the inner wall of the control cylinder. The inner cavity of the control cylinder is filled with alcohol. When the control cylinder is heated or cooled, the volume of the alcohol changes, thereby driving the control plug to slide. By controlling the plug to control the sliding of the transmission ring, a spiral groove is formed on the radial outer wall of the control shaft, and a transmission block is fixedly installed on the inner wall of the control ring. The outer wall of the transmission block is slidably fitted with the inner wall of the spiral groove. The sliding control ring slides along the inner wall of the spiral groove through the transmission block, thereby driving the control shaft to rotate. Furthermore, the expansion and contraction of the alcohol in the control cylinder are driven by the external temperature, and then the control plug is driven to slide, realizing the automatic adjustment of the positions of the hot end and the cold end of the control piece according to the external temperature, and further automatically adjusting the cooling and heating of the inner cavity of the heat preservation cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below with reference to the accompanying drawings.

[0036] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0037] Figure 2 is a schematic structural diagram of the mounting bracket in the present invention;

[0038] Figure 3 is a schematic structural diagram of the sliding rod in the present invention;

[0039] Figure 4 is a schematic internal structure diagram of the storage cylinder in the present invention;

[0040] Figure 5 is a schematic diagram of the circulation groove in the present invention;

[0041] Figure 6 is a schematic installation diagram of the diversion fan in the present invention;

[0042] Figure 7 is a schematic installation diagram of the control plug in the present invention;

[0043] Figure 8 is a schematic diagram of the spiral groove in the present invention.

[0044] In the figure: 1, storage tank; 2, closing plate; 3, heat preservation cylinder; 4, transmission shaft; 5, support cylinder; 6, temperature control cylinder; 7, control cylinder; 8, magnetic block; 9, transmission plate; 10, buoyancy plate; 11, connecting cylinder; 12, transmission piece; 13, mounting bracket; 14, sliding rod; 15, connecting shaft; 16, control plate; 17, storage cylinder; 18, circulation groove; 19, transmission ball; 20, diversion fan; 21, heat exchange plate; 22, control plug; 23, transmission cylinder; 24, control shaft; 25, rotating shaft; 26, control piece; 27, heat conducting piece; 28, guide rod; 29, control ring; 30, transmission block; 31, spiral groove; 32, diversion plate. DETAILED DESCRIPTION OF THE INVENTION

[0045] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0046] Embodiment 1: As Figures 1 to 8 shown, the dynamic stability device for liquid rocket sea-launch propellant filling of the present invention includes a storage part, a collection mechanism, a damping mechanism and an auxiliary mechanism.

[0047] The storage part includes a storage tank 1 and a closing plate 2. The closing plate 2 is detachably installed at the upper end of the storage tank 1. The storage tank 1 is used to store the propellant. The closing plate 2 is connected to the storage tank 1 by bolts and is used to close the storage tank 1 to form a closed chamber.

[0048] The collection mechanism includes a buoyancy plate 10, a connecting cylinder 11 and a sliding rod 14. The bottom of the connecting cylinder 11 is fixedly connected to the upper end surface of the buoyancy plate 10. After the propellant is injected, the buoyancy plate 10 floats on the liquid surface. The sliding rod 14 is slidably arranged in the inner cavity of the connecting cylinder 11. The sliding rod 14 is a hexagonal prism and can slide along the inner wall of the connecting cylinder 11. At the same time, rotating the sliding rod 14 rotates through the connecting cylinder 11.

[0049] When the propellant liquid level in the storage tank 1 shakes, the buoyancy plate 10 floats on the liquid surface, which can offset the liquid fluctuation to a certain extent. When the liquid shakes, the floating ball will move accordingly, absorb the fluctuation energy through the change of buoyancy, and then reduce the amplitude of the liquid level shake, preventing the frequency of the liquid level shake from being the same as the frequency of the storage tank 1 shake, so as to achieve the effect of shock absorption and improve stability.

[0050] The damping mechanism includes a mounting frame 13, a magnetic block 8 and a transmission plate 9. The transmission plate 9 is a metal conductor plate. In this embodiment, an aluminum plate is selected. The mounting frame 13 is rotatably installed on the bottom surface of the closing plate 2. The magnetic block 8 is fixedly installed on the outer wall of the mounting frame 13 and there are two of them. The poles of the two magnetic blocks 8 close to each other are opposite, and a magnetic field is formed in the mounting frame 13 through the two magnetic blocks 8.

[0051] One end of the sliding rod 14 is rotatably connected to the mounting frame 13. The transmission plate 9 is located between the two magnetic blocks 8 and is fixedly connected to the sliding rod 14. When the liquid level in the storage tank 1 fluctuates, the buoyancy plate 10 moves synchronously, driving the sliding rod 14 to shake. At this time, the sliding rod 14 slides, driving the transmission plate 9 to move between the two magnetic blocks 8, and consuming the kinetic energy of the transmission plate 9 shaking through the Ampere force, thereby improving the buffering effect.

[0052] Among them, the sliding connection between the sliding rod 14 and the connecting cylinder 11 is to adapt to the use of liquid levels at different heights, so as to facilitate the buoyancy plate 10 to be in contact with the liquid surface in real time.

[0053] The auxiliary mechanism includes a storage cylinder 17 and a control board 16. The storage cylinder 17 is filled with damping liquid, and the control board 16 is slidably installed on the inner wall of the storage cylinder 17. Among them, the control board 16 is connected to the inner wall of the storage cylinder 17 through a spring, and the outer wall of the control board 16 is sealingly fitted with the inner wall of the storage cylinder 17.

[0054] Through holes for the damping liquid to pass through are provided on the outer wall of the control board 16. During the sliding process of the control board 16, the damping liquid generates damping through the through holes. The sliding of the control board 16 is controlled by the sliding of the mounting bracket 13, which is used to consume the kinetic energy of the rotation of the mounting bracket 13. Thus, when the liquid in the storage tank 1 rotates and flows horizontally, the kinetic energy of the flow is consumed, and the buffer adaptation range is improved.

[0055] As a preferred embodiment of the present invention, a transmission shaft 4 is rotatably installed on the inner wall of the storage cylinder 17. The axis of the transmission shaft 4 coincides with the axis of the storage cylinder 17. The upper end surface of the mounting bracket 13 is fixedly installed with a connecting shaft 15 connected to the transmission shaft 4. The transmission shaft 4 penetrates the storage cylinder 17, and a sealing bearing is provided at the connection position.

[0056] When the liquid in the storage tank 1 rotates and flows horizontally, the buoyancy plate 10 is driven by the surface tension of the liquid, so it has a tendency to move synchronously. At this time, the buoyancy plate 10 drives the connecting shaft 15 and the transmission shaft 4 to rotate synchronously.

[0057] A circulation groove 18 is provided on the radial outer wall of the transmission shaft 4, and the circulation groove 18 is inclined.

[0058] The control board 16 is sleeved on the outer wall of the transmission shaft 4. A transmission ball 19 is fixedly installed on the inner wall of the control board 16. The outer wall of the transmission ball 19 is slidably fitted with the inner wall of the circulation groove 18. By rotating the transmission shaft 4 and through the cooperation of the transmission ball 19 and the circulation groove 18, the control board 16 is driven to reciprocally slide along the axis of the transmission shaft 4. At this time, the damping liquid passes through the through holes on the outer wall of the control board 16 to generate damping, thereby consuming the kinetic energy of the rotation of the mounting bracket 13 and achieving the buffering effect.

[0059] In order to facilitate the synchronous movement of the buoyancy plate 10 driven by the horizontal rotation and flow of the liquid in the storage tank 1, a transmission piece 12 is fixedly installed on the bottom surface of the buoyancy plate 10, and it extends below the liquid level through the transmission piece 12, so that the buoyancy plate 10 is driven to move synchronously when the liquid in the storage tank 1 rotates and flows horizontally.

[0060] As a preferred embodiment of the present invention, a heat preservation cylinder 3 is fixedly installed on the upper end surface of the closing plate 2. The heat preservation cylinder 3 is sleeved on the outer wall of the storage cylinder 17. By controlling the temperature inside the cavity of the heat preservation cylinder 3, the damping liquid inside the storage cylinder 17 is maintained at the required temperature, the stability of the damping liquid is maintained, and further the stability of the buffering is maintained.

[0061] The upper end face of the closing plate 2 is fixedly installed with a temperature control cylinder 6. A rotating shaft 25 is rotatably installed at the axial end of the temperature control cylinder 6. A control piece 26 is fixedly installed on the outer wall of the rotating shaft 25. Among them, the control piece 26 divides the closing plate 2 into two chambers on the left and right. One of them is for gas circulation, and rotating the rotating shaft 25 is used to drive the control piece 26 to rotate.

[0062] The control piece 26 has a cold end and a hot end, and the control piece 26 is a common semiconductor refrigeration sheet.

[0063] The inner cavity of the temperature control cylinder 6 is interconnected with the inner cavity of the heat preservation cylinder 3. When it is necessary to heat the damping liquid in the storage cylinder 17, rotate the control piece 26 until the hot end of the control piece 26 is located in the chamber for gas circulation in the temperature control cylinder 6, so as to heat the air in the temperature control cylinder 6 and finally transport it to the heat preservation cylinder 3 to realize the heating of the damping liquid in the storage cylinder 17.

[0064] When it is necessary to cool the damping liquid in the storage cylinder 17, rotate the control piece 26 until the cold end of the control piece 26 is located in the chamber for gas circulation in the temperature control cylinder 6, so as to cool the air in the temperature control cylinder 6 and finally transport it to the inner cavity of the heat preservation cylinder 3 to realize the cooling of the damping liquid in the storage cylinder 17.

[0065] The upper end face of the closing plate 2 is fixedly installed with a support cylinder 5. A guiding fan 20 is fixedly installed in the inner cavity of the support cylinder 5. Among them, the guiding fan 20 is composed of a servo motor and a fan blade. The fan blade is arranged on the output shaft of the servo motor, and the rotation of the fan blade is controlled by the servo motor to control the gas flow.

[0066] One end of the support cylinder 5 is fixedly connected to the outer wall of the heat preservation cylinder 3 through a conduit, and the other end of the support cylinder 5 is connected to the temperature control cylinder 6 through a conduit. The guiding fan 20 is used to control the gas in the inner cavity of the temperature control cylinder 6 to flow into the inner cavity of the heat preservation cylinder 3, so as to maintain the temperature inside the heat preservation cylinder 3.

[0067] As a preferred embodiment of the present invention, a guiding plate 32 is fixedly installed on the radial outer wall of the storage cylinder 17. The guiding plate 32 is spirally distributed on the inner wall of the heat preservation cylinder 3. When air is introduced into the heat preservation cylinder 3, it is guided by the guiding plate 32 so that the discharged air uniformly contacts the outer wall of the storage cylinder 17, so that the damping liquid in the storage cylinder 17 is uniformly heated (or cooled).

[0068] A through hole for exhausting gas is opened at the upper end of the heat preservation cylinder 3, which is used to exhaust gas through this through hole when external gas is introduced into the heat preservation cylinder 3, so as to maintain the air pressure balance in the inner cavity of the heat preservation cylinder 3.

[0069] A heat conducting sheet 27 is fixedly installed on the outer wall of the control piece 26. A plurality of heat conducting sheets 27 are uniformly arranged along the outer wall of the control piece 26. The heat conducting sheet 27 is a common copper plate and is parallel to the axis of the temperature control cylinder 6, which is used to increase the contact area when the air is heated or cooled and improve the temperature control effect.

[0070] As a preferred embodiment of the present invention, a control cylinder 7 is fixedly installed on the upper end surface of the closing plate 2, and a control shaft 24 is rotatably installed on the inner wall of the control cylinder 7, and the control cylinder 7 provides installation and support for the control shaft 24.

[0071] One end of the control shaft 24 extends to the outer wall of the control cylinder 7 and is fixedly connected to the center position of the axial end of the rotating shaft 25. Rotating the control shaft 24 is used to drive the rotating shaft 25 to rotate, so as to adjust the positions of the cold end and the hot end of the control piece 26.

[0072] A control ring 29 is elastically installed in the inner cavity of the control cylinder 7, and the inner wall of the control ring 29 is slidably fitted with the radial outer wall of the control shaft 24, and the control shaft 24 provides support for the control ring 29.

[0073] A spiral groove 31 is formed on the radial outer wall of the control shaft 24, a transmission block 30 is fixedly installed on the inner wall of the control ring 29, and the outer wall of the transmission block 30 is slidably fitted with the inner wall of the spiral groove 31. Sliding the control ring 29 causes the transmission block 30 to slide along the inner wall of the spiral groove 31, thereby driving the control shaft 24 to rotate and realizing the rotational adjustment of the control piece 26.

[0074] A control plug 22 is slidably installed on the inner wall of the control cylinder 7, and the outer wall of the control plug 22 is hermetically fitted with the inner wall of the control cylinder 7. Among them, the inner cavity of the control cylinder 7 is filled with alcohol. When the control cylinder 7 is heated, the volume of the alcohol expands, thereby driving the control plug 22 to slide.

[0075] A transmission cylinder 23 is rotatably installed at the axial end of the control plug 22, and the other end of the transmission cylinder 23 is rotatably connected to the axial end of the control ring 29. When the control plug 22 slides, the control ring 29 is driven to slide through the transmission cylinder 23, and then the rotating shaft 25 is driven to rotate through the control shaft 24, realizing the rotational adjustment of the control piece 26.

[0076] In this embodiment, the expansion and contraction of the alcohol in the control cylinder 7 are driven by the external temperature, and then the control plug 22 is driven to slide, realizing the automatic adjustment of the positions of the hot end and the cold end of the control piece 26 according to the external temperature, and further automatically adjusting the cooling and heating in the inner cavity of the heat preservation cylinder 3.

[0077] In order to prevent the control ring 29 from rotating, a guide rod 28 is fixedly installed on the inner wall of the control cylinder 7, and the outer wall of the control ring 29 is slidably fitted with the outer wall of the guide rod 28. By setting the guide rod 28, the sliding trajectory of the control ring 29 is limited, thereby preventing the control ring 29 from rotating and improving the rotational stability of the control shaft 24.

[0078] The outer wall of the control cylinder 7 is fixedly installed with a heat exchange plate 21. One end of the heat exchange plate 21 extends into the inner cavity of the control cylinder 7. A plurality of heat exchange plates 21 are arranged in a ring along the axis of the control cylinder 7. Among them, the heat exchange plate 21 is a common copper plate, so that the external temperature can be transmitted to the alcohol inside the control cylinder 7 through the heat exchange plate 21, improving the sensitivity of the volume change of the alcohol.

[0079] The above front, back, left, right, up, and down are all based on the Figure 1 description in the accompanying drawings of the specification. Taking the observer's perspective as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0080] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the protection scope of the present invention.

[0081] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. Dynamic stability device for liquid rocket propellant filling during sea launch, characterized in that: It includes a storage part, a collection mechanism, a damping mechanism and an auxiliary mechanism; The storage part includes a storage tank (1) and a closing plate (2), and the closing plate (2) is detachably installed at the upper end of the storage tank (1); The collection mechanism includes a buoyancy plate (10), a connecting cylinder (11) and a sliding rod (14). The bottom of the connecting cylinder (11) is fixedly connected to the upper end surface of the buoyancy plate (10), and the sliding rod (14) is slidably arranged in the inner cavity of the connecting cylinder (11); The damping mechanism includes a mounting frame (13), a magnetic block (8) and a transmission plate (9). The transmission plate (9) is a metal conductor plate. The mounting frame (13) is rotatably installed on the bottom surface of the closing plate (2). The magnetic block (8) is fixedly installed on the outer wall of the mounting frame (13) and there are two of them. The poles of the two magnetic blocks (8) close to each other are opposite; One end of the sliding rod (14) is rotatably connected to the mounting frame (13). The transmission plate (9) is located between the two magnetic blocks (8), and the transmission plate (9) is fixedly connected to the sliding rod (14); The auxiliary mechanism includes a storage cylinder (17) and a control plate (16). The storage cylinder (17) is filled with damping liquid. The control plate (16) is slidably installed on the inner wall of the storage cylinder (17), and through holes for the damping liquid to pass through are opened on the outer wall; The sliding of the control plate (16) is controlled by the sliding of the mounting frame (13).

2. The dynamic stability device for filling propellants in a liquid rocket launched at sea according to claim 1, characterized in that: A transmission shaft (4) is rotatably installed on the inner wall of the storage cylinder (17), and a connecting shaft (15) connected to the transmission shaft (4) is fixedly installed on the upper end surface of the mounting frame (13); A circulation groove (18) is opened on the outer wall of the transmission shaft (4) in the radial direction. The control plate (16) is sleeved on the outer wall of the transmission shaft (4). A transmission ball (19) is fixedly installed on the inner wall of the control plate (16), and the outer wall of the transmission ball (19) is slidably attached to the inner wall of the circulation groove (18); A transmission piece (12) is fixedly installed on the bottom surface of the buoyancy plate (10).

3. The dynamic stability device for liquid rocket sea-launch propellant filling according to claim 2, characterized in that: A heat preservation cylinder (3) is fixedly installed on the upper end surface of the closing plate (2), and the heat preservation cylinder (3) is sleeved on the outer wall of the storage cylinder (17); A temperature control cylinder (6) is fixedly installed on the upper end surface of the closing plate (2). A rotating shaft (25) is rotatably installed at the axial end of the temperature control cylinder (6), and a control piece (26) is fixedly installed on the outer wall of the rotating shaft (25); The control piece (26) has a cold end and a hot end; The inner cavity of the temperature control cylinder (6) is communicated with the inner cavity of the heat preservation cylinder (3).

4. The dynamic stability device for liquid rocket sea-launch propellant filling according to claim 3, characterized in that: A support cylinder (5) is fixedly installed on the upper end surface of the closing plate (2), and a guide fan (20) is fixedly installed in the inner cavity of the support cylinder (5); One end of the support cylinder (5) is fixedly connected to the outer wall of the heat preservation cylinder (3) through a conduit, and the other end of the support cylinder (5) is connected to the temperature control cylinder (6) through a conduit.

5. The dynamic stability device for liquid rocket sea-launch propellant filling according to claim 4, characterized in that: A guide plate (32) is fixedly installed on the outer wall of the storage cylinder (17) in the radial direction, and the guide plate (32) is spirally distributed on the inner wall of the heat preservation cylinder (3); A through hole for exhausting gas is opened at the upper end of the heat preservation cylinder (3); A heat conducting sheet (27) is fixedly installed on the outer wall of the control sheet (26), and a plurality of the heat conducting sheets (27) are uniformly arranged along the outer wall of the control sheet (26).

6. The dynamic stability device for liquid rocket sea-launch propellant filling according to claim 5, characterized in that: A control cylinder (7) is fixedly installed on the upper end surface of the closing plate (2), a control shaft (24) is rotatably installed on the inner wall of the control cylinder (7), and one end of the control shaft (24) extends to the outer wall of the control cylinder (7) and is fixedly connected to the center position of the axial end of the rotating shaft (25).

7. The dynamic stability device for liquid rocket sea-launch propellant filling according to claim 6, characterized in that: A control ring (29) is elastically installed in the inner cavity of the control cylinder (7), and the inner wall of the control ring (29) is in sliding fit with the radial outer wall of the control shaft (24); A spiral groove (31) is formed in the radial outer wall of the control shaft (24), a transmission block (30) is fixedly installed on the inner wall of the control ring (29), and the outer wall of the transmission block (30) is in sliding fit with the inner wall of the spiral groove (31).

8. The dynamic stability device for liquid rocket sea-launch propellant filling according to claim 7, characterized in that: A control plug (22) is slidably installed on the inner wall of the control cylinder (7), and the outer wall of the control plug (22) is in sealing fit with the inner wall of the control cylinder (7); A transmission cylinder (23) is rotatably installed at the axial end of the control plug (22), and the other end of the transmission cylinder (23) is rotatably connected to the axial end of the control ring (29).

9. The dynamic stability device for liquid rocket sea-launch propellant filling according to claim 8, characterized in that: A guide rod (28) is fixedly installed on the inner wall of the control cylinder (7), and the outer wall of the control ring (29) is in sliding fit with the outer wall of the guide rod (28); A heat exchange plate (21) is fixedly installed on the outer wall of the control cylinder (7), one end of the heat exchange plate (21) extends into the inner cavity of the control cylinder (7), and a plurality of the heat exchange plates (21) are arranged in a ring along the axis of the control cylinder (7).

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