Magnetic power brake structure and load release device

Abstract

The present application relates to magnetic power brake structure and load release device, including piston cylinder; air pressure release structure; magnetic transmission device, which is driven by high pressure gas and moves along the side wall of the piston cylinder, which structure includes the outer magnetic ring group and the inner magnetic ring group with magnetism; brake conductor ring, which is a magnetic conductive structure and is sleeved on the piston cylinder. The present application has compact and reasonable structure, and is convenient to operate. By using high pressure gas as power source, the inner magnetic ring group is driven to work, and the outer magnetic ring group is driven to move in the same direction, so that the purpose of releasing load is achieved by using magnetic force transmission principle. Meanwhile, by designing parameters such as release device exhaust parameter, inner and outer magnetic ring parameter and brake conductor ring parameter, the load release process speed, overload and noise can be effectively controlled. The side pulling type single-stage piston cylinder underwater load release device designed by the present application adopts twice air intake mode, which can greatly release the energy distribution of the process, and significantly reduce the release overload and flow noise.

Description

Technical Field

[0001] This invention relates to the field of load release technology, and in particular to magnetic braking structures and load release devices. Background Technology

[0002] Hydraulic pressure balance release technology is a key technology for releasing equipment such as UUVs, drones, and torpedoes at great depths. It is an important technological direction for improving the stealth of underwater equipment platforms and is currently the most widely used technical measure for deep-sea underwater release.

[0003] Piston-cylinder type release technology is the most widely used and considered one of the most effective methods among water pressure balance release technologies. Traditional piston-cylinder type release technology generally uses high-pressure gas, high-pressure water, or high-pressure combustion gas as working fluids to drive the piston or piston cylinder (multi-stage cylinder scheme). The piston and load are directly connected by a rigid structural component, thereby realizing the transmission of thrust from the piston to the load.

[0004] Traditional underwater release devices are mainly divided into single-stage piston cylinder type, two-stage piston cylinder type, and multi-stage piston cylinder type technologies. Traditional underwater load release schemes have the following main problems:

[0005] (1) All release schemes are affected by environmental back pressure to varying degrees, and cannot achieve true water pressure balance load release;

[0006] (2) All release schemes have dynamic sealing problems in the piston cylinder, which need to be overcome by targeted measures;

[0007] (3) The release device has problems such as short acceleration stroke, large instantaneous overload during release and unbalanced energy release;

[0008] (4) The two-stage / multi-stage piston cylinder release scheme has the phenomenon of discontinuous work between stages.

[0009] (5) There are problems such as impact noise, excessive pressure in the piston cavity and bubble generation at the end of piston movement;

[0010] (6) Although the wire rope type single-stage piston cylinder release scheme has a large acceleration stroke, in addition to the problem of dynamic sealing, the wire rope is rigid and not easy to bend, and is prone to wear and breakage.

[0011] Therefore, we propose a magnetic braking structure and a load release device. Summary of the Invention

[0012] To address the shortcomings of existing production technologies, the applicant provides a magnetic braking structure and load release device. By using high-pressure gas as a power source, the inner magnetic ring assembly is driven to perform work, which in turn drives the outer magnetic ring assembly to move in the same direction. The load is released by utilizing the principle of magnetic force transmission. At the same time, by designing parameters such as exhaust parameters, inner and outer magnetic ring parameters, and braking conductor ring parameters of the release device, the speed, overload, and noise during the load release process can be effectively controlled.

[0013] The technical solution adopted in this invention is as follows:

[0014] A magnetic braking structure, used in load release devices, includes:

[0015] The piston cylinder is a magnetically conductive structure with an internal cavity closed at both ends;

[0016] The pressure relief structure is fixed to the piston cylinder and can controllably release high-pressure gas into the piston cylinder.

[0017] A magnetic drive device, driven by high-pressure gas and moving along the side wall of a piston cylinder, includes a magnetic component.

[0018] The outer magnetic ring assembly is movably sleeved outside the piston cylinder. The outer magnetic ring assembly includes multiple outer magnetic rings, and each outer magnetic ring is separated from each other and connected to each other by a connector.

[0019] The inner magnetic ring assembly is movably connected inside the piston cylinder. The inner magnetic ring assembly includes multiple inner magnetic rings, and each inner magnetic ring is separated from the others and connected to each other by a connector.

[0020] The braking conductor ring is a magnetically conductive structure that is sleeved on the piston cylinder. The braking conductor ring is concentric with the outer magnetic ring assembly and is used to brake the outer magnetic ring assembly when the outer magnetic ring assembly and the braking conductor ring are close together.

[0021] Its further features are:

[0022] In the outer magnetic ring group and the inner magnetic ring group, the widths of the outer magnetic ring and the inner magnetic ring are the same.

[0023] An outer magnetic ring spacer is sandwiched between two adjacent outer magnetic rings, and a conformal material is fitted on the outer wall of the outer magnetic ring spacer. An inner magnetic ring spacer is sandwiched between two adjacent inner magnetic rings, and the outer magnetic ring spacer and the inner magnetic ring spacer have the same width, wherein the width of the outer magnetic ring spacer is less than or equal to the width of the outer magnetic ring.

[0024] The pressure relief structure includes a high-pressure tank, which is connected to the piston cylinder through two pipes. Both pipes are equipped with flow control valves, and one of the pipes is also equipped with an exhaust valve.

[0025] Both the outer magnetic ring group and the inner magnetic ring group have connecting screws. The outer magnetic ring group has multiple connecting screws that are distributed in a ring at equal intervals, while the inner magnetic ring group has one connecting screw that is concentrically connected to the inner magnetic ring group.

[0026] The inner magnetic ring assembly is provided with cover plates at both the front and rear ends.

[0027] A linear bearing is connected to one end of the outer magnetic ring assembly near the brake conductor ring.

[0028] A load release device includes the magnetic braking structure as described in claim 1.

[0029] A load release device further includes:

[0030] A grid-like tube, which is connected to the piston cylinder via two piston cylinder supports distributed at its head and tail;

[0031] The load model is set inside the grid tube, and the tail of the load model is detachably connected to the outer magnetic ring assembly via a hook.

[0032] The locking and positioning mechanism is fixed on the grid tube and can controllably limit the load model.

[0033] The brake conductor ring is fixedly connected to the grid tube by a conductor ring bracket.

[0034] The beneficial effects of this invention are as follows:

[0035] This invention features a compact and rational structure, and is easy to operate. It utilizes high-pressure gas as a power source to drive the inner magnetic ring assembly, which in turn drives the outer magnetic ring assembly to move in the same direction. This achieves load release using the principle of magnetic force transmission. Furthermore, by designing parameters such as the exhaust parameters, inner and outer magnetic ring parameters, and braking conductor ring parameters of the release device, the speed, overload, and noise during the load release process can be effectively controlled. The side-pull single-stage piston cylinder underwater load release device designed in this invention employs a two-stage air intake method, which can significantly smooth the energy distribution during the release process, significantly reducing release overload and flow noise. This release device uses inner and outer magnetic rings for magnetic force transmission, and the piston cylinder is completely enclosed, so the release process is completely unaffected by environmental pressure. The braking process uses electromagnetic eddy current braking, which has many technical advantages such as low noise and bubble-free operation. The release device has a simple structure and small size, and low requirements for the release platform, making it applicable to load release on various underwater platforms.

[0036] In addition, the present invention also has the following advantages:

[0037] (1) The release process does not require any gunpowder energy or other chemical energy, nor does it require the platform to provide auxiliary operations such as water injection / drainage. Only a control command signal from the platform is needed. The release device has a simple structure, is pressure-bearing, can be installed off-board, and has very few restrictions on the release platform.

[0038] (2) The load release process does not require overcoming the environmental back pressure, and the motion parameters of the load exiting the cylinder are not affected by the release environment. Therefore, it is very suitable for load release models in a wide range of variable depth environments.

[0039] (3) Compared with the traditional single-stage piston cylinder release scheme, the load in this scheme can basically achieve full-range acceleration, and the effective acceleration stroke is longer. By adopting a two-stage air intake method, the gas energy can be smoothed to a greater extent, significantly reducing the instantaneous load during load release.

[0040] (4) The present invention has low requirements for the release platform. The release process only requires the platform to provide a release command, and the load release can be completed automatically.

[0041] (5) By setting magnetic ring groups inside and outside the piston cylinder respectively, a ring magnetic circuit structure is formed, so as to achieve the purpose of linear motion of the inner and outer magnetic rings in the same direction, thereby outputting the power of the inner magnetic ring to the outer magnetic ring outside the closed piston cylinder, which perfectly solves the problem of dynamic sealing in high pressure environment. The piston cylinder is made of high resistivity metal material, and the eddy current braking effect during the piston acceleration process is very small.

[0042] (6) At the end of the piston's motion, the metal brake conductor ring cuts the magnetic lines of force of the inner and outer magnetic rings, generating a significant eddy current braking effect. The magnetic transmission device stops rapidly under the combined action of the Lorentz force and the air cushion effect of the compressed gas in the piston cylinder's reverse cavity. By reasonably setting parameters such as the position, length, and thickness of the metal brake conductor ring, the piston's eddy current braking force can be effectively controlled, thereby controlling the increase in gas pressure in the piston cylinder's reverse cavity and the piston's braking distance, ensuring that the braking process is bubble-free, noise-free, and free from high pressure in the piston cylinder.

[0043] (7) The end of the outer magnetic ring is connected to the linear bearing. The end of the linear bearing near the brake conductor ring is tapered, which can both suppress cavitation at the end of the magnetic ring and serve as a base to bear the force of the hook. Using a linear bearing can reduce sliding friction and ensure that there is no significant deflection under unilateral force, ensuring that there is no jamming during the movement.

[0044] (8) Install a pressure balancing valve to control the pressure before and after the load model is released, ensuring that the release device does not require additional braking force. After the load model is released, open the balancing valve and the piston metal cap respectively to eliminate the pressure imbalance problem during the piston reset process.

[0045] (9) A positioning pin locking device is installed in the rear section of the grid tube near the tail of the load. After the load is loaded into place, the release device platform sends a model positioning and locking command signal to the positioning pin locking device. The positioning pin locking device pops out the positioning pin under the action of spring force, locking the load to the grid tube. After receiving the model load release command signal, the positioning pin locking device unlocks under the action of electromagnetic force, allowing the load model to move through.

[0046] (10) A Hall sensor is installed in the area near the outlet of the front section of the grid tube, and works with the magnet embedded in the tail of the load to monitor the movement status of the load model and send a signal to the release platform that the load model has reached its position.

[0047] (11) This invention provides a side-pull underwater release device and release method based on magnetic transmission, and proposes a novel single-stage piston cylinder underwater release method, which can realize quiet release of underwater load models with a wide range of varying depths. At the same time, the release device adopts a two-stage air intake method, which can significantly smooth the energy distribution during the release process and significantly reduce release overload and flow noise.

[0048] (12) The piston adopts a fully enclosed magnetic transmission mode, which avoids the problem of dynamic sealing in high pressure environment. The entire load release process is not affected by environmental pressure, and the same load model motion parameters can be achieved at different water depths. Attached Figure Description

[0049] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0050] Figure 2 for Figure 1 Enlarged schematic diagram of the magnetic drive device.

[0051] Figure 3 for Figure 2 Sectional view of AA.

[0052] Figure 4 This is a schematic diagram of the magnet parameters in Experiment 1 of this invention.

[0053] Figure 5 The results are the simulation results of axial magnetic force in Experiment Example 1 of this invention.

[0054] Figure 6 This is the stress simulation result from Experiment Example 1 in this invention.

[0055] Figure 7 The results are simulations of magnetic flux density in Experiment Example 1 of this invention.

[0056] Figure 8 This is a line graph showing the velocity changes in the inner and outer magnetic ring groups in Experimental Example 2 of this invention.

[0057] Figure 9 This is a line graph showing the force changes in the inner and outer magnetic ring assemblies in Experiment Example 2 of this invention.

[0058] Figure 10 This is a diagram showing the magnetic field distribution in the inner and outer magnetic ring groups in Experimental Example 2 of this invention.

[0059] The components include: 1. Exhaust valve; 2. Flow control valve; 3. High-pressure tank; 4. Magnetic drive device; 5. Piston cylinder support; 6. Grid tube; 7. Piston cylinder; 8. Magnet; 9. Hook; 10. Hall sensor; 11. Brake conductor ring; 12. Metal cap; 13. Load model; 14. Conductor ring support; 15. Locking and positioning mechanism.

[0060] 401. Outer magnetic ring; 402. Conformal material; 403. Outer magnetic ring spacer; 404. Connecting screw one; 405. Linear bearing; 406. Inner magnetic ring; 407. Connecting screw two; 408. Magnet front cover plate; 409. Magnet rear cover plate; 410. Inner magnetic ring spacer. Detailed Implementation

[0061] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0062] Example 1

[0063] like Figures 1-3 As shown, this embodiment discloses a magnetic braking structure used in a load release device, including a piston cylinder 7, a pneumatic release structure, a magnetic transmission device 4, and a braking conductor ring 11. The magnetic transmission device 4 includes an outer magnetic ring group and an inner magnetic ring group. High-pressure gas is used as a power source to drive the inner magnetic ring group to do work and drive the outer magnetic ring group to move in the same direction. The driving purpose is achieved by using the magnetic force transmission principle. At the same time, the braking process adopts electromagnetic eddy current braking method, which has many technical advantages such as low noise and no bubbles.

[0064] Specifically,

[0065] In this embodiment, as Figure 1 As shown, the piston cylinder 7 is a magnetically conductive structure with an inner cavity closed at both ends. Metal caps 12 are connected to both ends of the piston cylinder 7 to maintain internal sealing. The piston cylinder 7 needs to be made of a material with low magnetic permeability, high resistivity and high strength (stainless steel) to ensure that the Lorentz force during the movement of the magnet is small.

[0066] In this embodiment, as Figure 1 As shown, the pressure release structure is fixed on the piston cylinder 7 and can controllably release high-pressure gas into the piston cylinder 7. The pressure release structure includes a high-pressure tank 3, which is connected to the piston cylinder 7 through two pipes. Both pipes are equipped with flow control valves 2, and one of the pipes is also equipped with an exhaust valve 1.

[0067] In this embodiment, as Figure 2 As shown, the magnetic drive device 4 is driven by high-pressure gas and moves along the side wall of the piston cylinder 7. Its structure includes an outer magnetic ring group, an inner magnetic ring group, and a linear bearing 405.

[0068] The outer magnetic ring assembly is magnetic and is movably sleeved on the outside of the piston cylinder 7. The outer magnetic ring assembly includes multiple outer magnetic rings 401, and each outer magnetic ring 401 is separated from each other and connected to each other by a connector.

[0069] The inner magnetic ring assembly is magnetic and movably connected inside the piston cylinder 7. The inner magnetic ring assembly includes multiple inner magnetic rings 406, and each inner magnetic ring 406 is spaced apart from each other and connected to each other by a connector.

[0070] A linear bearing 405 is connected to one end of the outer magnetic ring assembly near the brake conductor ring 11.

[0071] In this embodiment, the outer magnetic ring 401 and the inner magnetic ring 406 have the same width in the outer magnetic ring group and the inner magnetic ring group.

[0072] Preferably, an outer magnetic ring spacer 403 is sandwiched between two adjacent outer magnetic rings 401, and a conformal material 402 is fitted onto the outer wall of the outer magnetic ring spacer 403. An inner magnetic ring spacer 410 is sandwiched between two adjacent inner magnetic rings 406, and the outer magnetic ring spacer 403 and the inner magnetic ring spacer 410 have the same width.

[0073] In a preferred embodiment, the width of the outer magnetic ring spacer 403 is less than or equal to the width of the outer magnetic ring 401, while the width of the inner magnetic ring spacer 410 is less than or equal to the width of the inner magnetic ring 406. This ensures that even when the outer magnetic ring 401 and the inner magnetic ring 406 are misaligned, there will still be magnetic induction, thereby improving the transmission and braking effects.

[0074] The braking conductor ring 11 is a magnetically conductive structure and is sleeved on the piston cylinder 7. The braking conductor ring 11 is concentric with the outer magnetic ring assembly and is used to brake the outer magnetic ring assembly when the outer magnetic ring assembly and the braking conductor ring 11 are close together.

[0075] Both the outer and inner magnetic ring assemblies use connecting screws. The outer magnetic ring assemblies have multiple connecting screws 404 that are distributed equidistantly in a ring, while the inner magnetic ring assemblies have a single connecting screw 407 that is concentrically connected to the inner magnetic ring assemblies, ensuring that the inner and outer magnetic ring assemblies form a whole.

[0076] The inner magnetic ring assembly has cover plates at both ends, namely the front cover plate 408 and the rear cover plate 409, which can buffer the impact.

[0077] By setting magnetic ring groups inside and outside the piston cylinder 7 respectively, a ring magnetic circuit structure is formed, which achieves the purpose of linear motion of the inner and outer magnetic rings in the same direction. This allows the power of the inner magnetic ring to be output to the outer magnetic ring outside the closed piston cylinder 7, perfectly solving the dynamic sealing problem in high-pressure environments. The piston cylinder 7 is made of a high-resistivity metal material, and the eddy current braking effect during the piston acceleration process is very small.

[0078] At the end of the piston's motion, the metal brake conductor ring 11 cuts the magnetic lines of force of the inner and outer magnetic rings, generating a significant eddy current braking effect. The magnetic transmission device 4 stops rapidly under the combined action of the Lorentz force and the cushioning effect of the compressed gas in the piston cylinder 7's reverse cavity. By rationally setting parameters such as the position, length, and thickness of the metal brake conductor ring 11 (under certain design parameters for the inner and outer magnetic rings, a larger thickness of the brake conductor ring 11 results in a stronger magnetic force; a longer length leads to a larger magnetic contact area and a better braking effect), the piston's eddy current braking force can be effectively controlled. This controls the increase in gas pressure in the piston cylinder 7's reverse cavity and the piston's braking distance, ensuring that the braking process is bubble-free, noise-free, and free of high pressure in the piston cylinder 7.

[0079] The outer magnetic ring 401 is connected to the linear bearing 405 at one end. The end of the linear bearing 405 near the brake conductor ring 11 is tapered, which can both suppress cavitation at the end of the magnetic ring and serve as a base to support the force of the hook 9. Using the linear bearing 405 can reduce sliding friction and ensure that there is no significant deflection under unilateral force, thus ensuring that there is no jamming during the movement.

[0080] In this embodiment, as Figure 2 As shown, the number and position of the outer magnetic ring 401 and the inner magnetic ring 406 are corresponding, both being four, which can improve efficiency during transmission and braking.

[0081] Experimental Example 1

[0082] Numerical simulation experiment of magnetic transmission process:

[0083] like Figures 4-7 As shown, numerical simulation software was used to perform typical state simulation calculations only on the magnitude of the magnetic force transmission of the magnets. The numerical simulation state settings consisted of four sets of magnets connected in series, as shown in the numerical simulation calculation conditions.

[0084] Calculation conditions:

[0085] Inner ring radius R2 = 35mm;

[0086] Outer ring inner diameter R3 = 43mm;

[0087] Outer ring diameter R4 = 73 mm;

[0088] The outer ring is 22mm higher than the inner ring by a height h.

[0089] The axial spacing between the magnets is H = 40 mm;

[0090] The inner and outer ring magnets have the same height, z = 45 mm.

[0091] In this embodiment, as Figure 5 As shown, the magnetic force simulation results indicate that, with four sets of series-connected magnets using geometric parameters as calculated, the magnetic force transmitted by the inner and outer magnets is approximately 5000N.

[0092] like Figure 6 and Figure 7 As shown, based on the stress simulation results and magnetic flux density simulation results, we can conclude that:

[0093] The magnet strength of this invention meets the design requirements and will not cause structural damage. Furthermore, the strong magnetic field is primarily located inside the magnetic transmission device and decays rapidly outside the device, thus not causing significant magnetic field interference to the surrounding environment.

[0094] Experiment Example 2

[0095] like Figure 8-10 As shown, this experimental example is a simulation test of braking effect:

[0096] The magnetic drive device includes four inner magnetic rings 406 and four outer magnetic rings 401. The braking conductor ring 11 is made of aluminum. Considering the influence of air compression force (the inner magnetic rings 406 are subjected to air compression force), the inner magnetic rings 406 and the outer magnetic rings 401 simultaneously enter the braking section of the braking conductor ring 11 at a speed of 10 m / s. Both the inner magnetic rings 406 and the outer magnetic rings 401 can be braked.

[0097] like Figure 8-9 As shown, the inner magnetic ring 406 and the outer magnetic ring 401 brake alternately. Their braking distances are not equal, but they are relatively close. However, the forces they experience are roughly opposite in direction. The electromagnetic force sometimes brakes and sometimes pushes, but the work done in braking is greater than the work done in pushing. This phenomenon is alternating, and the values ​​are not equal. That is, the outer magnetic ring 401 is larger, the inner magnetic ring 406 is larger, the outer magnetic ring 401 is larger, the inner magnetic ring 406 is larger, and the outer magnetic ring 401 is larger. The maximum braking force during the process is about 8000N.

[0098] like Figure 10 As shown, the inner magnetic ring 406 completes braking in 0.046s, while the outer magnetic ring 401 takes longer, 0.055s. The magnetic field distribution when both rings complete braking is given as follows. Figure 10 As shown.

[0099] It can be seen that the magnetic field distribution is relatively reasonable. The maximum magnetic field strength occurs at the boundary of the magnet. When the inner magnetic ring 406 completes braking, the maximum magnetic field strength is 1.84T, which is slightly greater than the 1.8T when the outer magnetic ring 401 completes braking. The maximum magnetic field strength on the braking conductor ring 11 is 0.4T, and the minimum is 0.04T. The magnetic field strength in the air region outside the braking conductor ring 11 is weaker, gradually decreasing from 0.04T to 0T.

[0100] Example 2

[0101] like Figure 1 As shown, this embodiment discloses a load release device, including a magnetic braking structure as in Embodiment 1.

[0102] The load release device in this embodiment also includes a grid tube 6, a load model 13, and a locking and positioning mechanism 15.

[0103] Specifically,

[0104] like Figure 1 As shown, in this embodiment, the grid tube 6 is connected to the piston cylinder 7 through two piston cylinder supports 5 distributed at the beginning and end. The grid tube 6 is open on at least one side to facilitate the release of the load model 13.

[0105] The load model 13 is set inside the grid tube 6, and the tail of the load model 13 is detachably connected to the outer magnetic ring assembly via a hook 9. At the same time, a Hall sensor 10 for detecting the position of the load model 13 is also set on the grid tube 6.

[0106] The locking and positioning mechanism 15 is fixed on the grid tube 6 and can controllably limit the load model 13. At the same time, a magnet 8 corresponding to the locking and positioning mechanism 15 is provided on the load model 13.

[0107] The brake conductor ring 11 is fixedly connected to the grid tube 6 via the conductor ring bracket 14.

[0108] During work:

[0109] Before the load model 13 is released, both the exhaust valve 1 and the flow control valve 2 are in the closed state, the positive and negative chambers of the piston cylinder 7 are in a state of pressure balance, and both the inner magnetic ring 406 and the outer magnetic ring 401 are in a state of force balance.

[0110] When the load is released, the high-pressure gas discharged from the high-pressure tank 3 creates a pressure difference between the front and back of the magnetic drive device 4. Under the action of the pressure difference, the magnetic drive device 4 and the load model 13 move in the same direction in a straight line. Under the traction of the hook 9, the load model 13 and the magnetic drive device 4 move rapidly forward together towards the front of the grid tube 6, thereby realizing the release of the load model 13.

[0111] Work process:

[0112] Before the load is released, both the exhaust valve 1 and the flow control valve 2 are closed, the piston cylinder 7 is in a pressure balance state, and the load model 13 is only constrained by the locking and positioning mechanism 15 within the grid tube 6.

[0113] The release process mainly includes the following main steps:

[0114] Step 1: When released, the locking and positioning mechanism 15 is unlocked, and the flow control valve 2 is opened sequentially according to the set timing, and the high-pressure gas is discharged into the piston cylinder 7 at high speed;

[0115] Step 2: The magnetic drive device 4 moves rapidly forward of the piston cylinder 7 under the action of high-pressure gas, while simultaneously driving the load model 13 to move in a straight line.

[0116] Step 3: When the tail of the load model 13 moves to the position of the Hall sensor 10, the Hall sensor 10 sends a positioning signal. The control system then sequentially closes the flow control valve 2, and the magnetic drive device 4 and the load model 13 begin to decelerate.

[0117] Step 4: When the front end of the magnetic drive device 4 reaches the end of the metal brake conductor ring 11, the magnetic drive device 4 activates the eddy current braking mode. Under the combined action of the eddy current braking force and the high pressure in the sealed chamber on the other side of the piston cylinder 7, the magnetic drive device 4 gradually decelerates until it stops moving;

[0118] Step 5: In the initial stage of the motion phase in Step 4, the load model 13 disengages from the hook 9. Under the action of inertia, the load model 13 continues to move until it exits the grid tube 6, and the single-shot release process of the load model 13 ends.

[0119] Next loading and release process:

[0120] Step 6: After the load release platform rises to the water surface or returns to the port, open the exhaust valve 1 and the metal cover 12. The magnetic drive device 4 is in a state of pressure balance before and after.

[0121] Step 7: The load model 13 is slowly pushed in from the outlet of the grid tube 6. Under the action of the tail of the load model 13, the hook 9 retracts along the slot of the grid tube 6 to the initial position before the previous release.

[0122] Step 8: The load model 13 and the magnetic transmission device 4 retract to the initial position, the locking and positioning mechanism 15 locks, and the load model 13 is in the release standby state.

[0123] Step 9: Repeat Step 1 to start the release process of the next load model 13.

[0124] The present invention has the following advantages:

[0125] (1) The release process does not require any gunpowder energy or other chemical energy, nor does it require the platform to provide auxiliary operations such as water injection / drainage. Only a control command signal from the platform is needed. The release device has a simple structure, is pressure-bearing, can be installed off-board, and has very few restrictions on the release platform.

[0126] (2) The load release process does not require overcoming the environmental back pressure, and the motion parameters of the load exiting the cylinder are not affected by the release environment. Therefore, it is very suitable for load release models in a wide range of variable depth environments.

[0127] (3) Compared with the traditional single-stage piston cylinder release scheme, the load in this scheme can basically achieve full-range acceleration, and the effective acceleration stroke is longer. By adopting a two-stage air intake method, the gas energy can be smoothed to a greater extent, significantly reducing the instantaneous load during load release.

[0128] (4) By setting magnetic ring groups inside and outside the piston cylinder 7 respectively, a ring magnetic circuit structure is formed, so as to achieve the purpose of linear motion of the inner and outer magnetic rings in the same direction, thereby outputting the power of the inner magnetic ring to the outer magnetic ring outside the closed piston cylinder 7, which perfectly solves the problem of dynamic sealing in high pressure environment. The piston cylinder 7 is made of high resistivity metal material, and the eddy current braking effect during the piston acceleration process is very small.

[0129] (5) At the end of the piston's motion, the metal brake conductor ring 11 cuts the magnetic lines of force of the inner and outer magnetic rings, generating a significant eddy current braking effect. The magnetic transmission device 4 stops rapidly under the combined action of the Lorentz magnetic force and the air cushion effect of the compressed gas in the piston cylinder 7's reverse cavity. By reasonably setting parameters such as the position, length, and thickness of the metal brake conductor ring 11, the piston eddy current braking force can be effectively controlled, thereby controlling the increase in gas pressure in the piston cylinder 7's reverse cavity and the piston braking distance, ensuring that the braking process is bubble-free, noise-free, and free from high pressure generated in the piston cylinder 7.

[0130] (6) The end of the outer magnetic ring 401 is connected to the linear bearing 405. The end of the linear bearing 405 near the brake conductor ring 11 is tapered, which can both suppress the cavitation phenomenon at the end of the magnetic ring and serve as a base to support the force of the hook 9. Using the linear bearing 405 can reduce sliding friction and ensure that there is no significant deflection under unilateral force, ensuring that there is no jamming during the movement.

[0131] (7) A pressure balancing valve is installed to control the pressure before and after the load model is released, ensuring that the release device does not require additional braking force. After the load model is released, the balancing valve and the piston metal cap are opened respectively, which can eliminate the pressure imbalance problem before and after the piston is reset.

[0132] (8) A positioning pin locking device is installed in the rear section of the grid tube near the tail of the load. After the load is loaded into place, the release device platform sends a model positioning and locking command signal to the positioning pin locking device. The positioning pin locking device pops out the positioning pin under the action of spring force, locking the load to the grid tube. After receiving the model load release command signal, the positioning pin locking device unlocks under the action of electromagnetic force, allowing the load model to move through.

[0133] (9) A Hall sensor is installed in the area near the outlet of the front section of the grid tube, and works with the magnet embedded in the tail of the load to monitor the movement status of the load model and send a signal to the release platform that the load model has reached its position.

[0134] (10) This invention provides a side-pull underwater release device and release method based on magnetic transmission, and proposes a new type of single-stage piston cylinder 7 underwater release method, which can realize quiet release of underwater load models with a wide range of varying depths. At the same time, the release device adopts a two-stage air intake method, which can greatly smooth the energy distribution during the release process and significantly reduce release overload and flow noise.

[0135] (11) The piston adopts a fully enclosed magnetic transmission mode, which avoids the problem of dynamic sealing in high pressure environment. The entire load release process is not affected by environmental pressure, and the same load model motion parameters can be achieved at different water depths.

[0136] (12) The present invention has low requirements for the release platform. The release process only requires the platform to provide a release command, which can automatically complete the load release.

[0137] This invention uses high-pressure gas as a power source to drive the inner magnetic ring to perform work, which in turn drives the outer magnetic ring to move in the same direction, achieving the purpose of releasing the load by utilizing the principle of magnetic force transmission. By designing parameters such as the exhaust parameters, inner and outer magnetic ring parameters, and braking conductor ring parameters of the release device, the speed, overload, and noise during the load release process can be effectively controlled. The side-pull single-stage piston cylinder 7 underwater load release device designed in this invention adopts a two-stage air intake method, which can significantly smooth the energy distribution during the release process and significantly reduce release overload and flow noise. This release device uses inner and outer magnetic rings for magnetic force transmission, and the piston cylinder 7 is completely closed, so the release process is completely unaffected by environmental pressure. The braking process adopts electromagnetic eddy current braking, which has many technical advantages such as low noise and no bubbles. The release device has a simple structure, small size, and low requirements for the release platform, and can be applied to load release for various underwater platforms.

[0138] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A magnetic braking structure, used in a load release device, characterized in that, include: The piston cylinder (7) is a magnetically conductive structure with an inner cavity closed at both ends; The gas pressure release structure is fixed on the piston cylinder (7) and can controllably release high-pressure gas into the piston cylinder (7); A magnetic drive device (4), which is driven by high-pressure gas and moves along the side wall of the piston cylinder (7), has a structure including magnetic components: The outer magnetic ring assembly is movably sleeved outside the piston cylinder (7). The outer magnetic ring assembly includes multiple outer magnetic rings (401), and each outer magnetic ring (401) is separated from each other and connected to each other by a connector. The inner magnetic ring assembly is movably connected inside the piston cylinder (7). The inner magnetic ring assembly includes multiple inner magnetic rings (406), and each inner magnetic ring (406) is separated from each other and connected to each other by a connector. Braking conductor ring (11), which is a magnetic structure and is sleeved on piston cylinder (7), and the braking conductor ring (11) is concentric with the outer magnetic ring group, and is used to brake the outer magnetic ring group when the outer magnetic ring group and the braking conductor ring (11) are close; A linear bearing (405) is connected to one end of the outer magnetic ring assembly near the brake conductor ring (11). The end of the outer magnetic ring (401) is connected to the linear bearing (405), and the end of the linear bearing (405) near the brake conductor ring (11) is tapered.

2. The magnetic braking structure as described in claim 1, characterized in that: In the outer magnetic ring group and the inner magnetic ring group, the outer magnetic ring (401) and the inner magnetic ring (406) have the same width.

3. The magnetic braking structure as described in claim 1, characterized in that: An outer magnetic ring spacer (403) is sandwiched between two adjacent outer magnetic rings (401), and a conformal material (402) is sleeved on the outer wall of the outer magnetic ring spacer (403). An inner magnetic ring spacer (410) is sandwiched between two adjacent inner magnetic rings (406), and the outer magnetic ring spacer (403) and the inner magnetic ring spacer (410) have the same width. The width of the outer magnetic ring spacer (403) is less than or equal to the width of the outer magnetic ring (401).

4. The magnetic braking structure as described in claim 3, characterized in that: The pressure release structure includes a high-pressure tank (3), which is connected to the piston cylinder (7) through two pipes. Both pipes are equipped with flow control valves (2), and one of the pipes is also equipped with an exhaust valve (1).

5. The magnetic braking structure as described in claim 1, characterized in that: Both the outer magnetic ring group and the inner magnetic ring group have connecting screws. The outer magnetic ring group has multiple connecting screws that are distributed in a ring at equal intervals, while the inner magnetic ring group has one connecting screw that is concentrically connected to the inner magnetic ring group.

6. The magnetic braking structure as described in claim 1, characterized in that: The inner magnetic ring assembly is provided with cover plates at both the front and rear ends.

7. A load release device, characterized in that: Includes the magnetic braking structure as described in claim 1.

8. A load release device as described in claim 7, characterized in that, Also includes: The grid tube (6) is connected to the piston cylinder (7) through two piston cylinder supports (5) distributed at the front and rear sides; The load model (13) is set inside the grid tube (6), and the tail of the load model (13) is detachably connected to the outer magnetic ring assembly via a hook (9); The locking and positioning mechanism (15) is fixed on the grid tube (6) and can controllably limit the load model (13).

9. A load release device as described in claim 8, characterized in that: The brake conductor ring (11) is fixedly connected to the grid tube (6) by the conductor ring bracket (14).

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