Moving-coil electromagnetic catapult current-collecting rail power supply structure and electromagnetic catapult device
By adopting a flow track power supply structure, the stability and adaptability issues of the power supply structure for the moving coil electromagnetic catapult swaying cable are solved, realizing a power supply scheme with high stability and low space occupation, avoiding cable failures and mechanical stress, and improving the reliability and maintenance convenience of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN YINHE ATITAN TECH CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-07
AI Technical Summary
Existing moving-coil electromagnetic catapult swaying cable power supply structure systems suffer from poor stability, low adaptability, and complex space occupation and layout. Furthermore, they exhibit problems such as frequent bending fatigue, wear and high failure rate, performance limitations, and efficiency loss in high-dynamic and high-power application scenarios.
The current-collecting rail power supply structure includes a current-collecting rail and a current collector. A groove is formed on the current-collecting rail. The current collector includes an insulating seat, a current collector shoe, a first elastic element, and a flexible connecting busbar. The current collector shoe is slidably disposed in the groove and is provided with pre-tightening force by the elastic element. The flexible connecting busbar supplies power to the linear motor coil, avoiding cable faults and mechanical stress, and improving the stability and flexibility of the system.
It reduces power outages caused by cable faults, lowers mechanical stress and contact resistance, extends component life, has high system stability, simple structure, is easy to maintain, adapts to complex environments, and reduces space occupation.
Smart Images
Figure CN224473167U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electromagnetic catapult technology, and in particular to a moving-coil electromagnetic catapult powered by a flow track and an electromagnetic catapult device. Background Technology
[0002] In existing technologies, the method of powering the mover using a towed cable involves the flexible cable retracting and extending with the movement of the mover to achieve power transmission. Although the structure is simple, in the high-dynamic, high-power application scenarios of electromagnetic catapults, there are serious problems such as frequent bending fatigue, high wear and failure rates, performance limitations, efficiency losses, and space and maintenance challenges.
[0003] Traditional moving-coil electromagnetic catapults power the linear motor coil mover via a tow cable. This power supply method suffers from several drawbacks: the cable's mass and inertia limit the mover's acceleration, affecting launch efficiency; cable swaying at high speeds can cause vibrations, interfering with system stability; poor redundancy in individual cables makes them prone to breakage; cable resistance leads to energy loss over long distances, impacting launch efficiency; and the need for cable expansion space increases system size, especially noticeable in long-stroke catapults. These drawbacks include speed limitations, poor system stability, low flexibility, voltage drop and efficiency losses, and complex space requirements and layout.
[0004] Therefore, it is necessary to provide a new moving-coil electromagnetic catapult power supply structure and electromagnetic catapult device to solve the above-mentioned technical problems. Utility Model Content
[0005] The main purpose of this utility model is to provide a moving-coil electromagnetic catapult power supply structure and electromagnetic catapult device, which aims to solve the problems of poor stability, low adaptability, space occupation and complex layout of the existing moving-coil electromagnetic catapult swaying cable power supply structure system.
[0006] To achieve the above objectives, this utility model proposes a moving-coil electromagnetic catapult current-collecting rail power supply structure for supplying power to the linear motor coil in an electromagnetic catapult device. It includes a current-collecting rail and a current collector. A groove is formed on the current-collecting rail, which is electrically connected to an external power source. The current collector includes an insulating base, a current-collecting shoe, a first elastic element, and a flexible connecting busbar. The linear motor coil is disposed on the insulating base. A first end of the current-collecting shoe is connected to the insulating base, and a second end is slidably disposed within the groove. The current-collecting shoe and the insulating base are in a clearance fit along a first direction. The first elastic element is connected between the current-collecting shoe and the insulating base along the first direction. The flexible connecting busbar is connected between the current-collecting shoe and the linear motor coil, and the flexible connecting busbar is capable of conducting electricity between the current-collecting shoe and the linear motor coil.
[0007] Optionally, the current collecting rail includes an insulating base, a current collecting body, and an insulating plate. The current collecting body is disposed on the insulating base and is electrically connected to an external power source. An insulating plate is provided on each side of the current collecting body, and the two insulating plates cooperate to form a groove at the end of the current collecting body away from the insulating base. The current collecting body slides in contact with the current collecting shoe.
[0008] Optionally, the current collector shoe includes a slip shoe seat and a slider, the slip shoe seat is connected between the insulating seat and the slider, the slip shoe seat is connected to the flexible connecting busbar; the slider is in sliding contact with the current receiving body.
[0009] Optionally, the current receiving body includes multiple current receiving sections arranged sequentially along the same straight line direction, adjacent current receiving sections are insulated from each other, and each current receiving section is electrically connected to a power supply through a power supply cable.
[0010] Optionally, each of the flow-receiving sections is provided with one or more anchor points.
[0011] Optionally, the flow receiving section includes two individual rails connected in parallel.
[0012] Optionally, the insulating base includes an upper composite plate, a rubber plate, and a lower composite plate stacked sequentially. The upper composite plate is connected to the linear motor coil, and the lower composite plate is connected to the slipper seat with a clearance fit.
[0013] Optionally, the number of current receiving rails is three, the three current receiving rails are spaced apart, and the three current receiving rails are insulated from each other; each current receiving rail is provided with a current collector, and each current receiving rail is connected to a power supply via a three-phase power supply cable, which can provide three-phase power to each current collector.
[0014] Optionally, a heat dissipation channel is formed on the current collector shoe, and the heat dissipation channel extends through the current collector shoe.
[0015] In addition, this utility model also provides a power supply structure including a magnetic stator assembly, the linear motor coil, and the moving-coil electromagnetic catapult current-collecting rail as described above. The magnetic stator assembly is arranged along the extension direction of the current-collecting rail. The moving-coil electromagnetic catapult current-collecting rail power supply structure can supply power to the linear motor coil, and the linear motor coil slides along the current-collecting rail through the current collector under the action of the magnetic field of the magnetic stator assembly.
[0016] In this invention, the current collector shoe of the current collector is slidably disposed in the current collection rail, and a first elastic element provides a pre-tightening force for the current collector shoe to fit against the sliding groove. The current collector shoe and the insulating seat are fitted with a gap to provide pre-tightening space. The contact method is relatively stable and can reliably conduct electricity, reducing power outages caused by cable faults. It also avoids the problems of insulation aging and wire breakage that easily occur in drag cables during long-term use due to frequent stretching, bending, and wear. The current collector shoe then supplies power to the linear motor coil through a flexible connecting busbar. The flexible connecting busbar can reduce mechanical stress and contact resistance, avoiding metal fatigue or breakage caused by frequent movement of rigid connections. The flexible connecting busbar absorbs mechanical stress through flexible deformation, extending the component's lifespan. This invention features high system stability, simple structure, and easy maintenance. Compared to cable power supply, it can adapt to complex environments and reduces space occupation. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the power supply structure for the moving-coil electromagnetic catapult and the linear motor coil in this embodiment of the invention.
[0019] Figure 2 for Figure 1 Schematic diagram of the current collector in the middle;
[0020] Figure 3 for Figure 1 A schematic diagram of the current collector and the linear motor coil;
[0021] Figure 4 for Figure 1 Assembly diagram of CIMC electric shoe, insulating base and first elastic element;
[0022] Figure 5 for Figure 1 A schematic diagram of the electromagnetic catapult system.
[0023] Explanation of icon numbers:
[0024] 1. Linear motor coil; 2. Current receiving rail; 2.1. Slide groove; 2.2. Insulating base; 2.3. Current receiving body; 2.4. Insulating plate; 3. Current collector; 3.1. Insulating seat; 3.1.1. Upper composite plate; 3.1.2. Rubber plate; 3.1.3. Lower composite plate; 3.2. Current collector shoe; 3.2.1. Slipper seat; 3.2.2. Slider; 3.3. First elastic element; 3.4. Flexible connecting busbar; 4. Power supply; 5. Three-phase power supply cable; 6. Magnetic stator assembly.
[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0028] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0030] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0031] This utility model proposes a moving-coil electromagnetic catapult power supply structure and electromagnetic catapult device, aiming to solve the problems of poor stability, low adaptability, space occupation and complex layout of existing moving-coil electromagnetic catapult power supply structures.
[0032] See Figures 1 to 4 A moving-coil electromagnetic catapult power supply structure is disclosed for supplying power to the linear motor coil 1 in the electromagnetic catapult device. The structure includes a current-collecting rail 2 and a current collector 3. A groove 2.1 is formed on the current-collecting rail 2, which is electrically connected to an external power source. The current collector 3 includes an insulating base 3.1, a current-collecting shoe 3.2, a first elastic element 3.3, and a flexible connecting busbar 3.4. The linear motor coil 1 is disposed on the insulating base 3.1. The first end of the current-collecting shoe 3.2 is connected to the insulating base 3.1, and the second end is slidably disposed within the groove 2.1. The current-collecting shoe 3.2 and the insulating base 3.1 are in a clearance fit along a first direction. The first elastic element 3.3 is connected between the current-collecting shoe 3.2 and the insulating base 3.1 along the first direction. The flexible connecting busbar 3.4 is connected between the current-collecting shoe 3.2 and the linear motor coil 1, and is capable of conducting electricity between the current-collecting shoe 3.2 and the linear motor coil 1. The current collector shoe 3.2 of the current collector 3 is slidably disposed in the current collection rail 2, and the first elastic element 3.3 provides a pre-tightening force for the current collector shoe 3.2 to fit against the slide groove 2.1. The current collector shoe 3.2 and the insulating seat 3.1 are clearance-fitted to provide pre-tightening space. The contact method is relatively stable and can reliably conduct electricity, reducing the problem of power interruption caused by cable failure. It avoids the problem of insulation aging and wire breakage that easily occur in the drag cable during long-term use due to frequent stretching, bending and wear. The current collector shoe 3.2 then supplies power to the linear motor coil 1 through the flexible connecting busbar 3.4. The flexible connecting busbar 3.4 can reduce mechanical stress and reduce contact resistance, avoiding metal fatigue or breakage caused by frequent movement of rigid connection. The flexible connecting busbar 3.4 absorbs mechanical stress through flexible deformation, extending the service life of the component.
[0033] In this embodiment, the first elastic element 3.3 is a compression spring. When there are slight deviations in the height or position of the current receiving rail 2 (such as thermal expansion and contraction, installation errors), the compression spring ensures that the slider 3.2.2 of the current receiver 3 and the groove 2.1 of the current receiving rail 2 remain tightly fitted through elastic force, preventing them from separating. If the contact surfaces of the two are not in good contact, arcing, sparking, or power outages will occur, affecting the stability of the power supply. In addition, during vehicle operation, the current receiver 3 will vibrate due to uneven track, changes in vehicle speed, or external impacts. The compression spring absorbs the vibration through elastic deformation, preventing hard collisions between the slider 3.2.2 and the current receiving rail 2, reducing mechanical damage and current fluctuations.
[0034] In harsh environments such as humidity, dust, and high temperatures, towed cables are easily affected, leading to performance degradation or even damage. This embodiment also includes sealing and protective devices to better adapt to complex environments and ensure stable power supply under various operating conditions. Compared to cable power supply, it can adapt to complex environments and reduces space occupation. Towed cables require regular inspection and replacement of worn parts, and locating fault points is difficult, resulting in higher maintenance costs. The current collection component has a relatively simple structure, typically requiring only periodic inspection and replacement of the current collector 3, making maintenance relatively easy and cost-effective. Towed cables require a certain amount of space for arrangement and can cause shaking during operation, potentially affecting the layout of moving mechanisms and other equipment. The current collection component is installed in a specific location and is tightly integrated with the installation structure, unlike towed cables which occupy additional space, thus facilitating the rational use of test platform space. In this embodiment, the flexible connection busbar 3.4 uses highly conductive materials and optimizes the contact area to avoid overheating or energy loss due to loosening or oxidation.
[0035] In this embodiment, a limiting groove is formed on the current collector shoe 3.2, and the insulating seat 3.1 is engaged in the limiting groove with a clearance fit; in another example, a limiting groove is formed on the insulating seat 3.1, and the current collector shoe 3.2 is engaged in the limiting groove with a clearance fit.
[0036] The current-collecting track 2 includes an insulating base 2.2, a current-collecting body 2.3, and an insulating plate 2.4. The current-collecting body 2.3 is mounted on the insulating base 2.2 and is electrically connected to an external power source. An insulating plate 2.4 is provided on each side of the current-collecting body 2.3. The two insulating plates 2.4 cooperate to form a groove 2.1 at the end of the current-collecting body 2.3 away from the insulating base 2.2, allowing the current-collecting body 2.3 to slide in contact with the current-collecting shoe 3.2. The insulating base 2.2 is laid along the track and provides electrical isolation to ensure operational safety. The insulating plate 2.4 effectively limits the movement of the current-collecting shoe 3.2, which slides in contact with the current-collecting body 2.3. In this embodiment, a small gap exists between the insulating plate 2.4 and the current-collecting shoe 3.2 within the groove 2.1 to accommodate minor displacements during movement.
[0037] Specifically, the current collector shoe 3.2 includes a sliding shoe seat 3.2.1 and a slider 3.2.2. The sliding shoe seat 3.2.1 is connected between the insulating seat 3.1 and the slider 3.2.2, and is connected to the flexible connecting busbar 3.4. The slider 3.2.2 is in sliding contact with the current receiving body 2.3. The sliding shoe seat 3.2.1 facilitates the installation of the flexible connecting busbar 3.4 and avoids interference between the insulating seat 3.1, the flexible connecting busbar 3.4, and the current receiving rail 2. Furthermore, the flexible connecting busbar 3.4 can compensate for the relative displacement (such as vibration or oscillation) between the current collector shoe 3.2 and the linear motor coil 1, ensuring continuous and stable current transmission. The slider 3.2.2 can also employ a redundant slider array, which can be switched in turn by the control system to distribute wear; it can also be lubricated with graphite lubricant or conductive grease to reduce the coefficient of friction; and a hydraulic damper + multi-stage spring can be added to the slider 3.2.2 suspension system to absorb impact energy.
[0038] Furthermore, the current-collecting body 2.3 includes multiple current-collecting sections arranged sequentially along the same straight line. Adjacent current-collecting sections are insulated from each other, and each current-collecting section is electrically connected to the power supply 4 via a power supply cable. Each current-collecting section is independently powered, reducing single-point current load. In this embodiment, a pneumatic-hydraulic linkage clamping system is used to adjust the pressure of the slider 3.2.2 in real time to ensure low contact resistance. For example, the pressure is increased during the catapult acceleration phase and decreased during the uniform speed phase to reduce wear. An electromagnetic coil arc-extinguishing device is arranged along the current-collecting rail 2 to elongate and extinguish the arc using Lorentz force. This embodiment also includes a control module, which is electrically connected to the power supply 4. The control module can realize segmented control of each current-collecting section through the power supply 4.
[0039] Furthermore, each current-receiving section is provided with one or more anchor points. The anchor points ensure the mechanical stability and electrical reliability of the current-receiving section. The anchor points firmly fix the current-receiving rail 2 to the supporting structure, avoiding lateral / longitudinal displacement caused by train vibration, wind force, or thermal expansion and contraction. During long-distance laying, the anchor points maintain the parallelism and height consistency of the current-receiving rail 2, ensuring stable contact of the slider 3.2.2 (current-receiving shoe).
[0040] In this embodiment, the receiving section includes two individual rails connected in parallel. If one individual rail in the receiving section fails, the system automatically switches to the other individual rail, further improving system reliability.
[0041] In this embodiment, the insulating base 3.1 includes an upper composite plate 3.1.1, a rubber plate 3.1.2, and a lower composite plate 3.1.3 stacked sequentially. The upper composite plate 3.1.1 is connected to the linear motor coil 1; the lower composite plate 3.1.3 is connected to the slipper base 3.2.1 with a clearance fit. The upper composite plate 3.1.1 and the lower composite plate 3.1.3 are commonly used for structural support or insulation, providing mechanical strength or electrical isolation. In current collection, they serve as substrates for contacting other components, ensuring stability and wear resistance. The rubber plate 3.1.2 is used for shock absorption, sealing, or insulation, reducing vibration and noise in dynamic contact components. The elastic properties of rubber can adapt to small displacements of the contact surface, while providing dustproof and moisture-proof protection.
[0042] In this embodiment, there are three current-collecting rails 2, spaced apart and insulated from each other. Each current-collecting rail 2 corresponds to a current collector 3, and each current-collecting rail 2 is connected to the power supply 4 via a three-phase power cable 5, enabling three-phase power supply to each current collector 3. The three-phase current (phase difference 120°) is transmitted to each current collector 3 through the three independent current-collecting rails 2. Each current collector 3 only contacts the current-collecting rail 2 corresponding to its phase, ensuring three-phase isolation. In this embodiment, the spacing between the current-collecting rails 2 is designed (typically ≥300mm), and insulating supports prevent phase-to-phase short circuits. The vehicle's metal frame requires grounding protection, and a protection device is triggered in case of leakage.
[0043] In addition, the moving-coil electromagnetic catapult power supply structure also includes a hydraulic damper + multi-stage spring set between the current collector shoe 3.2 and the insulating seat 3.1 to absorb impact energy.
[0044] A heat dissipation channel is formed on the current collector shoe 3.2 along the extension direction of the current receiving rail 2. A copper heat pipe is embedded inside the slider 3.2.2, and a heat dissipation channel is formed inside the copper heat pipe. The copper heat pipe can conduct heat to the heat dissipation fins, and then cool it with high-speed airflow. In this embodiment, heat dissipation fins are added to the current receiving rail 2 to enhance natural convection.
[0045] In this embodiment, a current sensor and a temperature sensor are also installed to detect the contact status in real time.
[0046] See also Figure 5 This embodiment also provides an electromagnetic catapult device, including a magnetic stator assembly 6, a linear motor coil 1, and a moving-coil electromagnetic catapult current-collecting rail power supply structure as described above. The magnetic stator assembly 6 is arranged along the extension direction of the current-collecting rail 2. The moving-coil electromagnetic catapult current-collecting rail power supply structure can supply power to the linear motor coil 1. The linear motor coil 1 slides along the current-collecting rail 2 through the current collector 3 under the action of the magnetic field of the magnetic stator assembly 6.
[0047] Since the electromagnetic catapult includes the moving-coil electromagnetic catapult power supply structure described above, the electromagnetic catapult possesses all the beneficial effects of the moving-coil electromagnetic catapult power supply structure described above, which will not be elaborated here.
[0048] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A moving-coil electromagnetic catapult power supply structure for supplying power to the linear motor coil (1) in an electromagnetic catapult device, characterized in that, The device includes a current-collecting rail (2) and a current collector (3). The current-collecting rail (2) has a groove (2.1) and is electrically connected to an external power source. The current collector (3) includes an insulating base (3.1), a current-collecting shoe (3.2), a first elastic element (3.3), and a flexible connecting busbar (3.4). The linear motor coil (1) is disposed on the insulating base (3.1). The first end of the current-collecting shoe (3.2) is connected to the insulating base (3.1), and the second end is slidably disposed in the groove. (2.1) Inside, the current collector shoe (3.2) and the insulating seat (3.1) are in clearance fit along the first direction; the first elastic member (3.3) is connected between the current collector shoe (3.2) and the insulating seat (3.1) along the first direction; the flexible connecting bus (3.4) is connected between the current collector shoe (3.2) and the linear motor coil (1), and the flexible connecting bus (3.4) is capable of conducting electricity between the current collector shoe (3.2) and the linear motor coil (1).
2. The moving-coil electromagnetic catapult power supply structure as described in claim 1, characterized in that, The current collecting rail (2) includes an insulating base (2.2), a current collecting body (2.3), and an insulating plate (2.4). The current collecting body (2.3) is disposed on the insulating base (2.2) and is electrically connected to an external power source. An insulating plate (2.4) is provided on each side of the current collecting body (2.3). The two insulating plates (2.4) cooperate to form a groove (2.1) at the end of the current collecting body (2.3) away from the insulating base (2.2). The current collecting body (2.3) slides in contact with the current collecting shoe (3.2).
3. The moving-coil electromagnetic catapult power supply structure as described in claim 2, characterized in that, The current collector shoe (3.2) includes a slip shoe seat (3.2.1) and a slider (3.2.2). The slip shoe seat (3.2.1) is connected between the insulating seat (3.1) and the slider (3.2.2). The slip shoe seat (3.2.1) is connected to the flexible connecting busbar (3.4). The slider (3.2.2) is in sliding contact with the current receiving body (2.3).
4. The moving-coil electromagnetic catapult power supply structure as described in claim 3, characterized in that, The current receiving body (2.3) includes multiple current receiving sections arranged sequentially along the same straight direction. Adjacent current receiving sections are insulated from each other, and each current receiving section is electrically connected to the power supply (4) through a power supply cable.
5. The moving-coil electromagnetic catapult power supply structure as described in claim 4, characterized in that, Each of the aforementioned flow-receiving sections shall have one or more anchoring points.
6. The moving-coil electromagnetic catapult power supply structure as described in claim 5, characterized in that, The receiving section comprises two single-unit rails connected in parallel.
7. The moving-coil electromagnetic catapult power supply structure according to any one of claims 3 to 5, characterized in that, The insulating base (3.1) includes an upper composite plate (3.1.1), a rubber plate (3.1.2), and a lower composite plate (3.1.3) stacked in sequence. The upper composite plate (3.1.1) is connected to the linear motor coil (1); the lower composite plate (3.1.3) is connected to the slipper base (3.2.1) with a clearance fit.
8. The moving-coil electromagnetic catapult power supply structure as described in claim 7, characterized in that, The number of current receiving rails (2) is three, the three current receiving rails (2) are arranged at intervals, and the three current receiving rails (2) are insulated from each other; each current receiving rail (2) is provided with a current receiver (3), and each current receiving rail (2) is connected to the power supply (4) through a three-phase power supply cable (5), which can provide three-phase power supply to each current receiver (3).
9. The moving-coil electromagnetic catapult power supply structure as described in claim 8, characterized in that, A heat dissipation channel is formed on the current collector shoe (3.2), and the heat dissipation channel extends through the current collector shoe.
10. An electromagnetic catapult device, characterized in that, The system includes a magnetic stator assembly (6), the linear motor coil (1), and a moving-coil electromagnetic catapult current-collecting rail power supply structure as described in claim 9. The magnetic stator assembly (6) is arranged along the extension direction of the current-collecting rail (2). The moving-coil electromagnetic catapult current-collecting rail power supply structure can supply power to the linear motor coil (1). The linear motor coil (1) slides along the current-collecting rail (2) through the current collector (3) under the action of the magnetic field of the magnetic stator assembly (6).