A throw device and underwater equipment

Abstract

The application discloses a throwing weight device and underwater equipment, which is used for solving the risk problem caused by the traditional mechanical throwing weight mechanism and improving the throwing weight and floating efficiency. The application comprises a metal shell, a stator core, an armature coil and a magnetic throwing weight block. The metal shell is internally provided with a containing cavity, the stator core is fixedly arranged in the containing cavity, and the armature coil is wound on the stator core. The magnetic throwing weight block is detachably adsorbed on the metal shell, the adsorption position of the magnetic throwing weight block corresponds to the area where the stator core is located, when the armature coil is supplied with direct current, one end of the stator core close to the magnetic throwing weight block forms a magnetic pole with the same polarity as the adsorption surface of the magnetic throwing weight block.

Description

Technical Field

[0001] This application relates to the field of underwater ballast disposal equipment technology, and more particularly to a ballast disposal device and underwater equipment. Background Technology

[0002] During deep-sea operations, the complex and ever-changing deep-sea environment presents numerous challenges, including high pressure, low temperature, strong corrosion, and harsh sea conditions. Underwater equipment may encounter various emergencies at any time during missions, such as sudden equipment failure or encountering extremely harsh sea conditions. In these emergency situations, to ensure the safe ascent of manned submersibles or other underwater equipment, an underwater jettisoning mechanism is typically installed on the underwater equipment. This mechanism is equipped with a weight and typically reduces the weight of the underwater equipment by jettisoning the weight or severing its connection with the equipment, allowing the underwater equipment to quickly rise to the surface using buoyancy.

[0003] In traditional mechanical ballast jettisoning mechanisms, the mechanism connects to the load or underwater equipment via clips or cables. During jettisoning, the underwater equipment is detached by releasing the clips or cutting the cables. However, in the complex environment of the deep sea, the clips are subjected to high pressure and strong corrosion for extended periods, making their metal components prone to wear and corrosion, leading to a decrease in structural strength and even failure to release properly at critical moments. Meanwhile, the cables are susceptible to breakage or entanglement due to the complex currents and equipment movement in the deep sea. Failure of the clips and cables prevents the underwater equipment from unloading the load and from surfacing in time, posing a significant safety risk. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a ballast jettisoning device and underwater equipment, which can solve the risk problems caused by traditional mechanical ballast jettisoning mechanisms and improve ballast jettisoning and surfacing efficiency.

[0005] The technical solution provided in this application is described below:

[0006] The first aspect of this application provides a load-release device, comprising: Metal casing, stator core, armature coil, and magnetic load block; The metal housing has an internal cavity, the stator core is fixedly disposed in the cavity, and the armature coil is wound around the stator core. The magnetic loading block is detachably adsorbed onto the metal housing. The adsorption position of the magnetic loading block corresponds to the area where the stator core is located. When the armature coil is energized with DC, the end of the stator core near the magnetic loading block forms a magnetic pole with the same polarity as the adsorption surface of the magnetic loading block.

[0007] Optionally, the jettisoning device may further include armature poles, rotor yoke, and propeller; The rotor yoke is disposed in the receiving cavity and parallel to the stator core. The armature poles are fixed on the side of the rotor yoke facing the stator core. When the direct current is switched to alternating current, the armature coil cooperates with the stator core to drive the rotor yoke to rotate. The propeller is located at the end of the metal casing away from the magnetic launch block, and one end of the propeller passes through the metal casing and is connected to the rotor yoke.

[0008] Optionally, a deep groove ball bearing is provided at the connection between the propeller and the metal housing.

[0009] Optionally, a flow guide is provided on the metal casing, the flow guide is connected to the outside of the metal casing by a connecting column, and the propeller is located inside the flow guide.

[0010] Optionally, the axis of rotation of the propeller is coaxial with the central axis of the stator core and the central axis of the magnetic loading block.

[0011] Optionally, the metal casing includes a ejection chamber and a motor housing, the ejection chamber is connected to the motor housing, the receiving cavity is formed between the ejection chamber and the motor housing, and the magnetic ejection block is adsorbed onto the outside of the ejection chamber.

[0012] Optionally, a sealing ring is provided at the connection between the jettison chamber and the motor housing.

[0013] Optionally, a connector is provided on the motor housing, one end of which passes through the motor housing and is connected to the armature coil, and the other end is used to connect to a power source.

[0014] Optionally, the stator core is made of silicon steel or cobalt iron.

[0015] The second aspect of this application provides an underwater device, including a device body and a jettisoning device as described in the first aspect and any optional embodiment of the first aspect, wherein the jettisoning device is fixed to the device body.

[0016] As can be seen from the above technical solutions, this application has the following beneficial effects: This application utilizes a metal casing with an internal cavity to house the stator core and wind the armature coil around it. When the armature coil is energized, a magnetic field is generated around the stator core. A magnetic ejector block is detachably attached to the outside of the metal casing, corresponding to the area of ​​the stator core. When direct current is applied to the armature coil, a magnetic field is generated around the stator core, forming a magnetic pole on the side of the stator core closest to the magnetic ejector block. The polarity of this magnetic pole is the same as the polarity of the magnetic ejector block's attachment surface. Therefore, using the principle of like poles repulsion, the magnetic ejector block is ejected from the metal casing, thus achieving ejection. Compared to traditional clips or cables, this application solves the risks associated with traditional mechanical ejection mechanisms, reduces the risk of failure, achieves rapid ejection, improves ejection efficiency, and thereby reduces safety risks. Attached Figure Description

[0017] Figure 1 This is an exploded schematic diagram of a discharge device according to this application; Figure 2 This is a schematic diagram of a magnetic throwing block after being thrown in a throwing device according to this application; Figure 3 This is a schematic diagram of the stator core, armature coil, armature poles and rotor yoke in a load-release device according to this application; Figure 4 This is a schematic diagram of an underwater device according to this application; In the figure, the components are: metal casing 01, stator core 02, armature coil 03, magnetic throw block 04, armature pole 05, rotor yoke 06, propeller 07, deep groove ball bearing 08, fairing 09, throw chamber 10, motor housing 11, sealing ring 12, connector 13, and main body of equipment 14. Detailed Implementation

[0018] In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and other terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to describe the relative positional relationship between the components or parts and do not specifically limit the specific installation orientation of each component or part.

[0019] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0020] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0021] Furthermore, the structures, proportions, sizes, etc., drawn in the accompanying drawings of this application are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0022] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Traditional throwing methods using clips or cables are prone to wear, corrosion, and entanglement in deep water, leading to throwing failure and the inability of underwater equipment to surface in a timely manner. This application proposes a throwing device and underwater equipment that can solve the risks associated with traditional mechanical throwing mechanisms, enabling timely throwing of heavy objects and improving throwing and surfacing efficiency. The specific description of this application is as follows: See Figures 1 to 3 The first aspect of this application provides a load-release device comprising: The device comprises a metal housing 01, a stator core 02, an armature coil 03, and a magnetic loading block 04. The metal housing 01 has an internal cavity, in which the stator core 02 is fixedly mounted, and the armature coil 03 is wound around the stator core 02. The magnetic loading block 04 is detachably attached to the metal housing 01, and the attachment position of the magnetic loading block 04 corresponds to the area where the stator core 02 is located. When the armature coil 03 is energized with direct current, the end of the stator core 02 near the magnetic loading block 04 forms a magnetic pole with the same polarity as the attachment surface of the magnetic loading block 04.

[0024] The metal casing 01 serves to support and protect the internal components. It possesses a certain strength and sealing performance, capable of withstanding the high-pressure environment of the deep sea, and preventing internal components such as the stator core 02 and armature coil 03 from being corroded by seawater and damaged by external pressure. The metal casing 01 is connected to the underwater equipment.

[0025] The metal housing 01 has an internal cavity, and the stator core 02 is fixed inside the cavity. It is fixed by means of interference fit, bolt connection, etc., to ensure that the connection between the stator core 02 and the metal housing 01 is firm and will not shake or shift during operation, thereby ensuring the stability and accuracy of the magnetic field generated.

[0026] The stator core 02 is generally made of materials with good magnetic permeability, such as silicon steel sheets. This material can effectively conduct magnetism, enhance the strength and concentration of the magnetic field, thereby improving the working efficiency of the load release device.

[0027] The armature coil 03 is tightly wound around the stator core 02. The number and density of the winding are determined according to actual working requirements. More turns generally result in a stronger magnetic field when the same current is applied. The armature coil 03 is connected to an external power source via wires. When direct current is applied, current flows through the armature coil 03, generating a magnetic field based on the principle of electromagnetic induction.

[0028] The magnetic load-discharging block 04 is detachably adsorbed onto the metal housing 01. The adsorption method relies on magnetic attraction to ensure stable adsorption onto the metal housing 01 when no power is applied. The adsorption position of the magnetic load-discharging block 04 corresponds to the area where the stator core 02 is located. Therefore, when the armature coil 03 is energized, the magnetic field generated by the stator core 02 can directly act on the magnetic load-discharging block 04, achieving effective magnetic repulsion load discharging.

[0029] In this embodiment, the magnetic launcher block 04 can be used as a weight itself, or a weight can be attached to the magnetic launcher block 04; the metal shell 01 is connected to the underwater equipment. When no power is applied, the magnetic launcher block 04 is attracted to the metal shell 01 by its own magnetism. At this time, the magnetic launcher block 04 is in a stable connection state and will not accidentally detach.

[0030] When load release is required, a direct current is supplied to the armature coil 03. According to Ampere's law (right-hand screw law), the current flowing through the armature coil 03 generates a magnetic field around the stator core 02. Since the magnetic load release block 04 is attached to the area where the stator core 02 is located, the end of the stator core 02 near the magnetic load release block 04 will form a magnetic pole with the same polarity as the attachment surface of the magnetic load release block 04 (i.e., the surfaces that are close to each other have the same polarity; for example, if the attachment surface of the magnetic load release block 04 is N-pole, the end of the stator core 02 facing the magnetic load release block 04 is also N-pole). When the repulsive force between the magnetic field generated by the stator core 02 and the magnetic field of the attachment surface of the magnetic load release block 04 is large enough, it will overcome the attraction between the magnetic load release block 04 and the metal shell 01, causing the magnetic load release block 04 to detach from the metal shell 01, thereby releasing the magnetic load release block 04. The underwater equipment separates from the magnetic load release block 04, allowing the underwater equipment to surface or perform other tasks.

[0031] In this embodiment, a metal housing 01 is provided, with a receiving cavity inside. The stator core 02 is placed inside the receiving cavity, and the armature coil 03 is wound around the stator core 02. When the armature coil 03 is energized, a magnetic field is formed around the stator core 02. A magnetic throwing block 04 is detachably adsorbed outside the metal housing 01, corresponding to the area where the stator core 02 is located. When direct current is applied to the armature coil 03, a magnetic field is formed around the stator core 02, and a magnetic pole is formed on the side of the stator core 02 near the magnetic throwing block 04. The polarity of this magnetic pole is the same as the polarity of the adsorption surface of the magnetic throwing block 04. Therefore, using the principle of like poles repulsion, the magnetic throwing block 04 is ejected from the metal housing 01, thereby achieving throwing. Compared with the traditional buckle or cable method, this application can solve the risk problems brought about by the traditional mechanical throwing mechanism, reduce the failure risk, achieve rapid throwing, improve throwing efficiency, and thus reduce safety risks.

[0032] Please continue reading. Figure 1 and Figure 2 In an optional embodiment, the load-release device further includes an armature magnetic pole 05, a rotor magnetic yoke 06, and a propeller 07. The rotor magnetic yoke 06 is disposed in the receiving cavity and parallel to the stator core 02. The armature magnetic pole 05 is fixed on the side of the rotor magnetic yoke 06 facing the stator core 02. When the DC power is switched to AC power, the armature coil 03 cooperates with the stator core 02 to drive the rotor magnetic yoke 06 to rotate. The propeller 07 is located at the end of the metal housing 01 away from the magnetic load-release block 04, and one end of the propeller 07 passes through the metal housing 01 and is connected to the rotor magnetic yoke 06.

[0033] In this embodiment, the armature magnetic pole 05 is composed of several pairs of permanent magnets, and the several pairs of permanent magnets (N / S alternating) are embedded in the inner wall of the rotor yoke 06 (on the side facing the stator core 02).

[0034] The propeller 07 is fixed to the metal casing 01, with one end passing through the metal casing 01 and connected to the rotor yoke 06. The function of the propeller 07 is to convert the rotational motion of the rotor yoke 06 into propulsion. When the rotor yoke 06 drives the propeller 07 to rotate, the propeller 07 stirs the water, generating upward force to help the underwater equipment quickly rise after jettisoning.

[0035] In this application, the jettisoning and buoyancy are combined. During the jettisoning phase, the armature coil 03 is energized with DC current, and the stator core 02 forms a magnetic pole with the same polarity as the magnetic jettisoning block 04 at one end near the magnetic jettisoning block 04. By utilizing the principle of mutual repulsion between magnetic fields of the same polarity, the magnetic jettisoning block 04 is detached from the metal shell 01, thereby releasing the jettison and separating the underwater equipment from the heavy object.

[0036] After the load is released, the direct current in the armature coil 03 is switched to alternating current. At this time, the stator core 02 generates a rotating magnetic field under the action of the alternating current. Since the armature poles 05 are fixed on the rotor yoke 06, and the rotor yoke 06 is arranged parallel to the stator core 02, the rotating magnetic field will cut the armature poles 05, and induced electromotive force and induced current will be generated in the armature poles 05 and the rotor yoke 06.

[0037] The induced current interacts with the rotating magnetic field to generate an electromagnetic force, which forms a torque that drives the rotor yoke 06 to rotate. The rotation of the rotor yoke 06 drives the propeller 07 connected to it to rotate. When the propeller 07 rotates in the water, it applies a backward force (towards the stator core 02), i.e., an upward force, which causes the ballast jettisoning device and underwater equipment to float up quickly.

[0038] In this embodiment, based on the use of magnetic throwing block 04, after throwing is completed, the original DC power is changed to AC power to drive propeller 07, so that the underwater equipment has a driving force to float. The throwing + floating driving method enables the underwater equipment to float quickly and improves the floating speed.

[0039] It should be noted that when determining when to switch to AC power, the switch can be made immediately after a preset time of DC power application. This preset time can be 1s, 10s, 20s, or can be determined based on the required load shedding time in actual operation.

[0040] In addition to the preset DC power supply time, a pressure sensor can be installed between the magnetic loading block 04 and the metal housing 01. The pressure sensor is fixed to the metal housing 01. When the magnetic loading block 04 is attracted to the metal housing 01, it squeezes the pressure sensor. After loading is completed, the data transmitted by the pressure sensor changes significantly. This change is used to determine whether loading is complete. For example, if the pressure sensor reads 50N before loading and 1N after loading, this change indicates that loading is complete, and the DC power can be changed to AC power.

[0041] In this optional embodiment, a deep groove ball bearing 08 is provided at the connection between the propeller 07 and the metal housing 01. In this embodiment, by providing the deep groove ball bearing 08 at the connection between the propeller 07 and the metal housing 01, the friction between the propeller 07 and the metal housing 01 can be reduced, wear can be reduced, and frictional force can be reduced to improve rotational efficiency.

[0042] In this optional embodiment, a flow deflector 09 is provided on the metal housing 01. The flow deflector 09 is connected to the outside of the metal housing 01 by a connecting post, and the propeller 07 is located inside the flow deflector 09.

[0043] When connected to underwater equipment, the metal housing 01 is fixedly connected to the underwater equipment via the flow guide 09, such as by bolts or welding.

[0044] The fairing 09 is made of high-strength, corrosion-resistant materials, such as stainless steel, titanium alloy, or high-strength engineering plastics.

[0045] The flow guide 09 is fitted over the metal shell 01, and the inner wall of the flow guide 09 is connected to the connecting column, which is in turn connected to the metal shell 01. The propeller 07 is located inside the flow guide 09. When the propeller 07 rotates, it drives the water to flow downward along the flow guide 09, thereby achieving buoyancy.

[0046] The deflector 09 can reduce water flow resistance and energy loss, and guide the water flow through the propeller 07 in a more orderly manner, thus significantly improving the propulsion efficiency of the propeller 07.

[0047] In this optional embodiment, the axis of rotation of the propeller 07 is coaxial with the central axis of the stator core 02 and the central axis of the magnetic loading block 04.

[0048] The shaft of propeller 07 passes through the metal housing 01 and is connected to the rotor yoke 06 inside the housing cavity.

[0049] In this embodiment, the stator core 02 and the magnetic ejector block 04 are coaxial. When DC current is applied, the magnetic field of the stator core 02 is coaxial with the magnetic pole of the magnetic ejector block 04, ensuring that the repulsive force acts on the magnetic ejector block 04, so that each adsorption point of the magnetic ejector block 04 is simultaneously repelled and ejected, thereby improving the ejection efficiency.

[0050] The propeller 07 is coaxial with the stator core 02, and the stator core 02 is also coaxial with the rotor yoke 06. When AC power is applied, the downward water flow flows evenly around the metal shell 01, ensuring that the upward direction is consistent with the axis of the shaft.

[0051] In an optional embodiment, the metal housing 01 includes a throw-off chamber 10 and a motor housing 11. The throw-off chamber 10 is connected to the motor housing 11, and a receiving cavity is formed between the throw-off chamber 10 and the motor housing 11. The magnetic throw-off block 04 is adsorbed on the outside of the throw-off chamber 10.

[0052] The ejection chamber 10 is connected to the motor housing 11 by bolts or threads. After the ejection chamber 10 and the motor housing 11 are connected, a cavity is formed between them to accommodate the stator core 02, armature coil 03, rotor yoke 06 and armature pole 05.

[0053] The ejection chamber 10 is made of metal, and its outer bottom surface is set as a flat plane to facilitate magnetic adsorption of the magnetic ejection block 04. The magnetic ejection block 04 has strong magnetic properties, such as neodymium iron boron permanent magnets, and the adsorption surface of the magnetic ejection block 04 is also a flat plane.

[0054] In this optional embodiment, a sealing ring 12 is provided at the connection between the jettison chamber 10 and the motor housing 11. In this embodiment, the sealing ring 12 improves the airtightness between the jettison chamber 10 and the motor housing 11, reducing the possibility of water entering the containment cavity, thereby minimizing the impact on the stator core 02 and the armature coil 03. The sealing ring 12 can be made of rubber, silicone, or other materials.

[0055] In this optional embodiment, a connector 13 is provided on the motor housing 11. One end of the connector 13 passes through the motor housing 11 and is connected to the armature coil 03, while the other end is used to connect to the power supply.

[0056] Connector 13 generally consists of an insulator, conductors, and seals. The insulator uses high-performance insulating materials, such as polytetrafluoroethylene (PTFE) or silicone rubber, to ensure electrical isolation between conductors and between the conductors and the motor housing 11, preventing short circuits. The conductors are typically made of copper or copper alloys with excellent conductivity. Their shape and dimensions are designed according to the current carrying capacity and connection requirements of the armature coil 03 to ensure stable power transmission. The seals prevent moisture, dust, and other impurities from entering the motor, protecting the armature coil 03 and connector 13 from damage. The sealing material can be rubber or silicone.

[0057] The portion of connector 13 that penetrates the motor housing 11 is sealed to the motor housing 11, such as by using a rubber sealing ring 12 for compression sealing to ensure the sealing performance of the connection. The connection between connector 13 and armature coil 03 is usually achieved by welding or crimping. Welding provides a strong and reliable electrical connection; crimping uses a special crimping tool to press the conductor and the lead wire of armature coil 03 together to achieve electrical conduction.

[0058] The power supply connected to connector 13 includes DC power and AC power, with a switch in between. The switch can be controlled to disconnect, connect DC power, or connect AC power.

[0059] In an optional embodiment, the stator core 02 is made of silicon steel or cobalt iron.

[0060] In this embodiment, when the armature coil 03 is energized, a magnetic field is generated around the stator core 02. Since the stator core 02 is made of silicon steel or cobalt iron, its high permeability allows the magnetic field to be concentrated inside the core, forming a clear magnetic circuit. The low hysteresis loss and eddy current loss characteristics of silicon steel or cobalt iron can reduce energy loss in the rotor yoke 06 during energy conversion, improving rotational efficiency.

[0061] Please see Figure 4 The second aspect of this application provides an underwater device, including a device body 14 and a launch device of any of the foregoing embodiments, wherein the launch device is fixed on the device body 14.

[0062] In the specific structure, the main body of the equipment 14 is provided with a channel that runs vertically through it. The ejector device is fixed in the channel. The outer part of the ejector device's guide shroud 09 is connected to the inner wall of the channel. The ejector device's propeller 07 is located above, and the ejector device's magnetic ejector block 04 is located below.

[0063] Compared with traditional mechanical jetting mechanisms, this jetting device, after being installed on underwater equipment, has a stable magnetic jetting block 04. By controlling the current, the magnetic jetting block 04 can be quickly jettisoned, and the propeller 07 can be driven (driven to float), which significantly improves the reaction speed, thereby realizing the rapid jettisoning and rapid floating of underwater equipment.

Claims

1. A load-release device, characterized in that, include: Metal casing (01), stator core (02), armature coil (03) and magnetic loading block (04); The metal housing (01) has an internal cavity, the stator core (02) is fixedly disposed in the cavity, and the armature coil (03) is wound on the stator core (02); The magnetic loading block (04) is detachably adsorbed onto the metal housing (01). The adsorption position of the magnetic loading block (04) corresponds to the area where the stator core (02) is located. When the armature coil (03) is energized with DC, the end of the stator core (02) near the magnetic loading block (04) forms a magnetic pole with the same polarity as the adsorption surface of the magnetic loading block (04). The ejection device also includes an armature magnetic pole (05), a rotor magnetic yoke (06), and a propeller (07). The rotor yoke (06) is disposed in the receiving cavity and parallel to the stator core (02). The armature pole (05) is fixed on the side of the rotor yoke (06) facing the stator core (02). When the DC power is switched to AC power, the armature coil (03) cooperates with the stator core (02) to drive the rotor yoke (06) to rotate. The propeller (07) is located on the end of the metal housing (01) away from the magnetic launch block (04), and one end of the propeller (07) passes through the metal housing (01) and is connected to the rotor yoke (06); The underwater equipment is provided with a vertical channel, and the ballast jetting device is fixed in the channel. The propeller (07) of the ballast jetting device is located above, and the magnetic ballast jetting block (04) of the ballast jetting device is located below. When the rotor yoke (06) drives the propeller (07) to rotate, the propeller (07) stirs in the water, generating upward force to help the underwater equipment float up quickly after ballast jetting.

2. The ejection device according to claim 1, characterized in that, A deep groove ball bearing (08) is provided at the connection between the propeller (07) and the metal housing (01).

3. The ejection device according to claim 1, characterized in that, A flow guide (09) is provided on the metal housing (01). The flow guide (09) is connected to the outside of the metal housing (01) by a connecting column, and the propeller (07) is located inside the flow guide (09).

4. The ejection device according to claim 1, characterized in that, The axis of rotation of the propeller (07) is coaxial with the central axis of the stator core (02) and the central axis of the magnetic loading block (04).

5. The ejection device according to any one of claims 1 to 4, characterized in that, The metal housing (01) includes a ejection chamber (10) and a motor housing (11). The ejection chamber (10) is connected to the motor housing (11). The receiving cavity is formed between the ejection chamber (10) and the motor housing (11). The magnetic ejection block (04) is adsorbed on the outside of the ejection chamber (10).

6. The ejection device according to claim 5, characterized in that, A sealing ring (12) is provided at the connection between the jettison chamber (10) and the motor housing (11).

7. The ejection device according to claim 5, characterized in that, A connector (13) is provided on the motor housing (11). One end of the connector (13) passes through the motor housing (11) and is connected to the armature coil (03), while the other end is used to connect to the power supply.

8. The ejection device according to any one of claims 1 to 4, characterized in that, The stator core (02) is made of silicon steel or cobalt iron.

9. An underwater device, characterized in that, It includes a main body (14) and a launch device as described in any one of claims 1 to 8, wherein the launch device is fixed to the main body (14).

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