A wheel disc type solid multi-pulse rocket engine

Abstract

The application discloses a wheel disc type solid multi-pulse rocket engine and belongs to the solid rocket propulsion field.The application comprises a propellant storage device, a filling device and a combustion device.The propellant storage device comprises a propellant storage wheel disc, a ratchet wheel, a central shaft, propellant columns, a disc and a disc vertical rod.The six propellant columns are respectively stored in six holes of the propellant storage wheel disc; the central shaft is fixedly connected at a central position of the disc, and the propellant storage wheel disc is inserted on the central shaft; and the disc vertical rod connects the disc with a lower plate.The six same ratchet wheels are uniformly distributed on the propellant storage wheel disc.The propellant column located on the central hole of the disc is in a filling waiting state, and the remaining propellant columns can be blocked by the disc to prevent the propellant columns from falling.The filling device comprises a connecting rod, a fixing rod, a compression spring, a torsion spring, a propellant changing rod, a trigger rod, a propellant pushing plug, a propellant feeding drawer, a linear rotary motor, a shifting rod, a sliding table motor, a first guide rail, a second guide rail and a motor shaft connecting hole.The application adopts the wheel disc type filling to push the propellant in the propellant storage device into the combustion device, so that the multi-pulse thrust is realized.

Description

Technical Field

[0001] This invention relates to a disc-type solid multipulse rocket engine, belonging to the field of solid rocket propulsion. Background Technology

[0002] Solid rocket motors are simple in structure, easy to store, and highly safe; however, once started, they cannot be stopped. Solid rocket motors used in missiles typically provide acceleration for the missile in the first half of the launch phase, while the latter half relies solely on inertia for gliding.

[0003] Current multipulse solid rocket motors often incorporate baffles in the combustion chamber to divide the propellant grain into two or three segments, enabling multiple ignitions. However, this structure increases the size of the combustion chamber, the negative mass of the engine, and prevents the achievement of more ignition cycles. Existing refillable multipulse rocket motors (such as the Xia model) have excessively large combustion chambers, complex loading structures, and low reliability. Furthermore, refilling propellant requires repeatedly opening the combustion chamber, and existing devices do not address the dynamic seal for combustion chamber opening, nor the pre-tightening force required for the seal. Summary of the Invention

[0004] To address the limitations of conventional solid rocket motors, such as short range, weak penetration capability, and inability to undergo multiple ignition cycles, this invention aims to provide a disc-type solid multi-pulse rocket motor. The disc-type mechanical structure offers reliable performance and rapid loading. By re-igniting after loading, the problem of multiple ignition cycles in solid rocket motors is solved, and the range is increased through optimized engine energy management. This invention separates the combustion chamber and propellant tank, enabling the delivery of more than five pulse thrusts without increasing the combustion chamber size. This allows for a lighter propellant loading device, reducing the engine's negative mass. By providing multiple pulse thrusts, this invention enables the missile to provide thrust even in the terminal phase of flight, improving the missile's range, stealth, and penetration capability.

[0005] The objective of this invention is achieved through the following technical solution.

[0006] This invention discloses a disc-type solid multipulse rocket engine, comprising a propellant storage device, a loading device, and a combustion device. The propellant storage device independently stores propellant without increasing the combustion chamber volume. The loading device, in cooperation with the propellant storage device, pushes the propellant from the storage device into the combustion device; multiple propellant loadings achieve the goals of multipulse propulsion, penetration capability, and long range.

[0007] The drug storage device includes a drug storage wheel, ratchet, central shaft, drug cartridges, a disc, and a disc support rod. Six drug cartridges are stored in six holes on the drug storage wheel; the central shaft is fixed to the center of the disc, and the drug storage wheel is inserted into the central shaft; the disc support rod connects the disc to the flat plate below. Six identical ratchet wheels are evenly distributed on the drug storage wheel.

[0008] The propellant column located in the central hole of the disc is in a ready-to-be-filled state, while the other propellant columns are blocked by the disc to prevent them from falling out.

[0009] The loading device includes a connecting rod, a fixing rod, a compression spring, a torsion spring, a medicine changing rod, a trigger rod, a medicine pusher, a medicine delivery drawer, a linear rotary motor, a toggle rod, a slide motor, a first guide rail, a second guide rail, and a motor shaft connection hole.

[0010] The fixed rod is fixed to the disc; the connecting rod is connected to the fixed rod via a third shaft; the trigger rod is connected to the fixed rod via a first shaft; the dressing change rod and the trigger rod are connected together via a second shaft; a compression spring is placed between the connecting rod and the fixed rod; a torsion spring is connected between the dressing change rod and the trigger rod. The medication pusher is connected below the connecting rod.

[0011] The slide table motor, the first guide rail, and the second guide rail are fixedly connected to the large plate at the bottom and to the plate at the top. The two guide rails allow the plate to move more smoothly under the action of the slide table motor. The linear rotary motor and the toggle lever are fixedly connected to the plate. The medicine delivery drawer is connected to the linear rotary motor through the motor shaft. The linear rotary motor moves linearly, causing the medicine delivery drawer to enter the engine combustion chamber. The rubber ring on the rubber ring groove in the medicine delivery drawer achieves sealing. The linear rotary motor drives the medicine delivery drawer to rotate, so that the engine combustion chamber blades and the medicine delivery drawer blades cooperate to lock together. The linear motion of the slide table motor moves the medicine delivery drawer to the bottom of the hole for easy medicine replacement. The toggle lever moves the trigger lever to realize the filling of the medicine column and the rotation of the disc.

[0012] The combustion device includes an engine combustion chamber and a nozzle; the nozzle is located above the engine combustion chamber.

[0013] The center of the propellant column has a through hole to facilitate the flow of gas.

[0014] The explosive cartridges are wrapped in foam boards to prevent friction and explosion between the cartridges, which could cause danger.

[0015] The blades of the medicine delivery drawer have arc-shaped grooves to reduce dynamic friction during rotation.

[0016] The working method of a disc-type solid multipulse rocket engine disclosed in this invention is as follows: Figure 1As shown in the figure, the working method of a disc-type solid multipulse rocket engine disclosed in this embodiment is as follows: First, the rotary linear motor starts its rotation function, driving the propellant drawer to rotate. The blades of the propellant drawer disengage from the blades of the engine combustion chamber, releasing the engine sealing pre-tightening force. Then, the rotary linear motor starts its linear motion function, driving the propellant drawer to disengage from the engine combustion chamber. Next, the slide motor is started, and the plate fixed to the slide motor, the first guide rail, and the second guide rail drives the propellant drawer, the linear rotary motor, and the actuating rod to perform a translational movement together. When the propellant drawer is translated to below the central hole of the disc, the slide motor stops moving. At this time, the propellant drawer has moved to the predetermined position and is waiting for the propellant to be filled. At the same time, when the slide motor is translating, the actuating rod on the plate will actuate the trigger rod to rotate along the first axis. During the rotation of the trigger rod, two movements occur simultaneously. One of them is that the propellant changing rod rotates around the second axis on the trigger rod under the action of the torsion spring. The end of the propellant changing rod pushes the ratchet on the propellant storage wheel, causing the propellant storage wheel to rotate 60 degrees around the central axis, realizing the replacement of the propellant. Simultaneously, another movement occurs: as the trigger lever rotates, the connecting rod rotates around the third axis, causing the push plug fixed to the connecting rod to lift, and the compression spring to compress. When the medication wheel completes the medication change, the first lever on the trigger lever passes over the second lever on the connecting rod. At this time, under the action of the compression spring, the connecting rod rotates in the opposite direction around the third axis, causing the push plug fixed to the connecting rod to fall back to its initial position with a certain speed, pushing the medication in the medication wheel into the medication drawer. Then, the slide motor starts in reverse, driving the medication drawer, linear rotary motor, and actuating lever to perform a reverse translational movement until the medication drawer reaches directly below the engine combustion chamber. During the linear movement of the slide motor, the actuating lever gradually disengages from the trigger lever, and the trigger lever gradually returns to its initial position. During the return of the trigger lever to its initial position, the first lever passes over the second lever, and the medication changing lever returns to its initial position under the action of the torsion spring. When the delivery drawer reaches directly below the engine combustion chamber, the linear motion function of the linear motor activates, pushing the delivery drawer into the combustion chamber. Next, the rotation function of the linear motor activates, rotating the delivery drawer to disengage the delivery drawer blades from the engine combustion chamber blades, providing pre-tightening force for the rubber seal in the rubber ring groove. The delivery drawer blades have an arc-shaped groove below them to reduce friction during rotation. Then, engine ignition can be performed. This process is repeated, providing up to six pulse thrusts.

[0017] This invention addresses the issue of multiple ignition starts in solid rocket engines by reloading and then re-igniting, and increases range by optimizing engine energy management. By providing multiple pulse thrusts, the missile's engine can continue to provide thrust in the terminal phase of flight, improving its range, stealth, and penetration capabilities.

[0018] Beneficial effects:

[0019] 1. This invention discloses a disc-type solid multipulse rocket engine, in which the propellant storage device independently stores propellant without increasing the volume of the combustion chamber. Through the cooperation of a loading device and the propellant storage device, the propellant in the storage device is pushed into the combustion device; multiple loading of propellant achieves the objectives of multipulse propulsion, penetration capability, and long range.

[0020] 2. This invention discloses a disc-type solid multipulse rocket engine. The propellant storage device and loading device automatically load solid propellant through the coordinated operation of a storage disc, central shaft, disc, propellant changing rod, and propellant plug. This ensures that the propellant grain can be stored in the storage tank and that it can be released into the delivery tank at a preset time. Separating the combustion chamber and the propellant tank allows for the provision of sub-six pulse thrust without increasing the size of the combustion chamber, achieving a lightweight propellant loading device and reducing the negative mass of the engine.

[0021] 3. The present invention discloses a disc-type solid multipulse rocket engine. The locking and sealing preload of the engine is achieved by blade tightening. This method has moderate processing accuracy, strength, and cost, and is suitable for solid rocket engines with medium thrust.

[0022] 4. The multi-pulse automatic loading solid rocket motor disclosed in this invention exhibits moderate axial tensile and compressive stresses and shear stresses on the propellant grain during loading and transportation, resulting in stable operation. This invention is suitable for propellant grains with good mechanical properties. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the propellant transport process of a disc-type solid multipulse rocket engine disclosed in this invention;

[0024] Figure 2 This is the front view of the engine;

[0025] Figure 3 This is a schematic diagram of the loading mechanism;

[0026] Figure 4 This is a schematic diagram of the internal structure of the loading mechanism;

[0027] Figure 5 This is a schematic diagram of a medicine storage device;

[0028] Figure 6 This is a schematic diagram of the engine combustion chamber;

[0029] Figure 7 This is a diagram of the medicine delivery drawer;

[0030] Figure 8 This is a side view of the medicine delivery drawer;

[0031] Figure 9 This is a schematic diagram of a disc.

[0032] Among them, 1-connecting rod, 2-fixed rod, 3-compression spring, 4-torsion spring, 5-medication changing rod, 6-trigger rod, 7-push plug, 8-medication storage wheel, 9-ratchet, 10-central shaft, 11-medication column, 12-disc, 13-disc upright, 14-engine combustion chamber, 15-medication drawer, 16-linear rotary motor, 17-actuator, 18-slide table motor, 19-first guide rail, 20-second guide rail, 21-rubber ring groove, 22-motor shaft connecting hole, 23-engine combustion chamber blade, 24-medication drawer blade, 25-nozzle, 26-arc groove, 27-hole, 28-flat plate, 29-large flat plate, 30-first shaft, 31-second shaft, 32-first paddle, 33-second paddle, 34-third shaft. Detailed Implementation

[0033] To better illustrate the purpose and advantages of the present invention, the invention will be further described below in conjunction with the accompanying drawings and examples.

[0034] like Figure 1 As shown in the figure, this embodiment discloses a disc-type solid multipulse rocket engine, which includes a propellant storage device, a loading device, and a combustion device.

[0035] like Figure 1 and Figure 5 As shown, the drug storage device includes a drug storage wheel 8, ratchet 9, central shaft 10, drug cartridges 11, a disc 12, and a disc support 13. Six drug cartridges 11 are stored in the six holes of the drug storage wheel 8; the central shaft 10 is fixed to the center of the disc 12, and the drug storage wheel 8 is inserted into the central shaft 10; the disc support 13 connects the disc 12 to the lower plate. Six identical ratchet 9 are evenly distributed on the drug storage wheel 8.

[0036] The propellant column located in the hole 27 of the disc 12 is in a ready-to-fill state, while the other propellant columns can be blocked by the disc 12 to prevent them from falling.

[0037] like Figure 2 , Figure 3 and Figure 4 As shown, the loading device includes a connecting rod 1, a fixing rod 2, a compression spring 3, a torsion spring 4, a medicine changing rod 5, a trigger rod 6, a medicine pushing plug 7, a medicine delivery drawer 15, a linear rotary motor 16, a toggle rod 17, a slide table motor 18, a first guide rail 19, a second guide rail 20, and a motor shaft connecting hole 22.

[0038] Fixed rod 2 is fixed to disc 12, and fixed rod 1 is an L-shaped hammer; connecting rod 1 is connected to fixed rod 2 via third shaft 34, and fixed rod 2 is a hollow C-shaped rod; trigger rod 6 is connected to fixed rod 2 via first shaft 30; dressing change rod 5 and trigger rod 6 are connected together via second shaft 31; compression spring 3 is placed between connecting rod 1 and fixed rod 2; torsion spring 4 is connected between dressing change rod 5 and trigger rod 6. Push plug 7 is connected below connecting rod 1.

[0039] The slide motor 18, the first guide rail 19, and the second guide rail 20 are fixedly connected to the large flat plate 29 at the bottom and to the flat plate 28 at the top. The two guide rails allow the flat plate 28 to move more smoothly under the action of the slide motor 18. The linear rotary motor 16 and the toggle lever 17 are fixedly connected to the flat plate 28. The medicine delivery drawer is connected to the linear rotary motor 16 via the motor shaft 22 connecting shaft. The linear rotary motor 16 moves linearly, causing the medicine delivery drawer 15 to enter the engine combustion chamber. The rubber ring on the rubber ring groove 21 in the medicine delivery drawer 15 achieves sealing. Figure 6 , Figure 7 and Figure 8 As shown, the linear rotary motor 16 drives the medicine delivery box drawer 15 to rotate, causing the engine combustion chamber blades 23 to engage and lock with the medicine delivery drawer blades 24; the slide motor 18 moves linearly to deliver the medicine delivery drawer 15 to the desired position. Figure 9 Below the hole 27 shown, it is convenient to change the medicine. By moving the lever 17 to the trigger lever 6, the medicine column is loaded and the disc 12 is rotated.

[0040] The combustion device includes an engine combustion chamber 14 and a nozzle 25; the nozzle 25 is located above the engine combustion chamber 14.

[0041] A through hole is opened in the center of the propellant column 11 to facilitate the flow of gas.

[0042] The propellant column 11 is wrapped in a foam board to prevent friction and explosion between the propellant columns, which could cause danger.

[0043] The medicine delivery drawer blades 24 have arc-shaped grooves 26 to reduce dynamic friction during rotation.

[0044] The disc 12 is made of heat-insulating material to ensure the safe transport of the drug column.

[0045] like Figure 1As shown in this embodiment, the operating method of a disc-type solid multipulse rocket engine is as follows: First, the rotary linear motor 16 starts its rotation function, driving the propellant drawer 15 to rotate. The propellant drawer blades 24 disengage from the engine combustion chamber blades 23, releasing the engine sealing pre-tightening force. Then, the rotary linear motor 16 starts its linear motion function, driving the propellant drawer 15 to disengage from the engine combustion chamber 14. Next, the slide motor 18 is started, and the plate 28, fixed to the slide motor 18, the first guide rail 19, and the second guide rail 20, drives the propellant drawer 15, the linear rotary motor 16, and the actuating rod 17 to perform a translational movement together. When the propellant drawer 15 is translated to below the central hole 27 of the disc 12, the slide motor 18 stops moving. At this time, the propellant drawer 15 has moved to the predetermined position to await the loading of the propellant. At the same time, when the slide motor 18 is translating, the actuating rod 17 on the plate 28 will actuate the trigger rod 6 to rotate along the first axis 30. During the rotation of the trigger rod 6, two movements occur simultaneously. One of the movements involves the changing lever 2 rotating around the second axis 31 on the trigger lever 6 under the action of the torsion spring 3. The end of the changing lever 5 pushes the ratchet 9 on the medicine storage wheel 8, causing the medicine storage wheel 8 to rotate 60 degrees around the central axis 10, thus changing the medicine column. Simultaneously, during the rotation of the trigger lever 6, the connecting rod 1 rotates around the third axis 34, causing the push plug 7, which is fixed to the connecting rod 1, to lift. The compression spring 3 is also compressed. When the medicine storage wheel 8 completes the medicine column change, the first paddle 32 on the trigger lever 6 passes over the second paddle 33 on the connecting rod 1. At this time, under the action of the compression spring 3, the connecting rod 1 rotates in the opposite direction around the third axis 34, causing the push plug 7, which is fixed to the connecting rod 1, to fall back to its initial position with a certain speed, pushing the medicine column in the medicine storage wheel 8 into the medicine delivery drawer 15. Then, the slide motor 18 starts in reverse, driving the medicine delivery drawer 15, the linear rotary motor 16, and the actuating lever 17 to move in the opposite direction until the medicine delivery drawer 15 reaches directly below the engine combustion chamber 14. During the linear movement of the slide motor 18, the actuating lever 17 gradually disengages from the trigger lever 6, and the trigger lever 6 gradually returns to its initial position. During the return of the trigger lever 6 to its initial position, the first paddle 32 passes over the second paddle 33, and the medicine changing lever 5 returns to its initial position under the action of the torsion spring 3. When the medicine delivery drawer 15 reaches directly below the engine combustion chamber 14, the linear rotary motor 16 starts its linear movement function, pushing the medicine delivery drawer 15 into the engine combustion chamber 14. Next, the linear rotary motor 16 starts its rotation function, rotating the medicine delivery drawer 15, causing the medicine delivery drawer blade 24 to disengage from the engine combustion chamber blade 23, providing pre-tightening force for the rubber ring seal in the rubber ring groove 21. The medicine delivery drawer 24 has an arc-shaped groove 26 below the blade to reduce friction during rotation. Then, the engine can be ignited, and this process can be repeated to provide up to six pulse thrusts.

[0046] The propellant storage unit independently stores propellant without increasing the combustion chamber volume. A loading device, in cooperation with the storage unit, pushes the propellant from the storage unit into the combustion chamber; multiple propellant loadings achieve multi-pulse, penetration, and long-range capabilities.

[0047] The propellant storage and loading device automatically loads solid propellant through a coordinated mechanism of a storage wheel, central shaft, disc, propellant changing rod, and pusher plug. This ensures that the propellant grain is stored in the storage tank and that it is released into the delivery tank at a preset time. Separating the combustion chamber from the propellant tank allows for the provision of sub-sixth pulse thrust without increasing the size of the combustion chamber, enabling a lightweight propellant loading device and reducing the engine's negative mass.

[0048] The combustion device adopts an openable combustion chamber structure, which enables controllable engine thrust and allows for multiple ignitions. By re-igniting after loading, the problem of multiple ignition starts in solid rocket engines is solved, and the range is increased by optimizing engine energy management.

[0049] The loading device mainly consists of a connecting rod, a fixing rod, a compression spring, a torsion spring, a drug changing rod, a trigger rod, a drug pusher, a drug delivery drawer, a linear rotary motor, a toggle rod, a slide motor, a first guide rail, a second guide rail, and a motor shaft connection hole, forming a drug loading structure. The structure is simple, reliable, and easy to implement. A sealing and locking mechanism, composed of engine combustion chamber blades and drug delivery drawer blades, provides pre-tightening force for the engine seal, ensuring a stable and reliable structure.

[0050] The above detailed description further illustrates the purpose, technical solution, and beneficial effects of the invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A disc-type solid multipulse rocket engine, characterized in that: Includes a drug storage device, a filling device, and a combustion device; The medicine storage device includes a medicine storage wheel (8), a ratchet (9), a central shaft (10), a medicine stick (11), and a disc (12); the disc (12) has a raised central shaft (10) at its center and a medicine outlet hole (27) at its bottom; the medicine storage wheel (8) is placed in the disc (12) and rotates around the central shaft (10); the ratchet (9) is fixed at the center of the medicine storage wheel (8) and is higher than the upper plane of the medicine storage wheel (8), and cooperates with the medicine changing rod (5) to rotate the medicine storage wheel (8); the medicine stick (11) is placed in the groove of the medicine storage wheel (8); The loading device includes a connecting rod (1), a fixing rod (2), a compression spring (3), a torsion spring (4), a medicine changing rod (5), a trigger rod (6), a medicine pusher (7), a medicine delivery drawer (15), a linear rotary motor (16), and a toggle rod (17). The fixed rod (2) is fixed on the disc (12); the connecting rod (1) is connected to the fixed rod (2) through the third shaft (34); the trigger rod (6) is connected to the fixed rod (2) through the first shaft (30); the changing rod (5) and the trigger rod (6) are connected together through the second shaft (31); the compression spring (3) is placed between the connecting rod (1) and the fixed rod (2); the torsion spring (4) is connected between the changing rod (5) and the trigger rod (6); the push plug (7) is connected below the connecting rod (1); the delivery drawer (15) can move, that is, the combustion chamber is placed below the hole (27); the linear rotary motor (16) drives the delivery drawer (15) to rotate, so that the engine combustion chamber blade (23) and the delivery drawer blade (24) cooperate to lock; the toggle rod (17) moves the trigger rod (6) to realize the loading of the propellant and the rotation of the disc (12); The combustion device includes an engine combustion chamber (14) and a nozzle (25); the nozzle (25) is located above the engine combustion chamber (14).

2. The disc-type solid multipulse rocket engine as described in claim 1, characterized in that: A through hole is made in the center of the medicine column (11).

3. The disc-type solid multipulse rocket engine as described in claim 1, characterized in that: The medicine column (11) is wrapped in foam board.

4. A disc-type solid multipulse rocket engine as described in claim 1, characterized in that: The medicine delivery drawer blades (24) have an arc-shaped groove (26).

5. A disc-type solid multipulse rocket engine as described in claim 1, 2, 3 or 4, characterized in that: The linear rotary motor (16) starts its rotation function, driving the medicine delivery drawer (15) to rotate. The medicine delivery drawer blades (24) disengage from the engine combustion chamber blades (23), releasing the engine sealing preload. Then, the linear rotary motor (16) starts its linear motion function, driving the medicine delivery drawer (15) to disengage from the engine combustion chamber (14). Next, the slide motor (18) is started, and the plate (28) fixed to the slide motor (18), the first guide rail (19), and the second guide rail (20) drives the medicine delivery drawer (15), the linear rotary motor (16), and the lever (17) to perform a translational movement. When the medicine delivery drawer (15) translates... When the slide motor (18) reaches below the hole (27) in the disc (12), it stops moving. At this time, the medicine drawer (15) has moved to the predetermined position to wait for the medicine column to be filled. At the same time, when the slide motor (18) moves horizontally, the lever (17) on the plate (28) will push the trigger lever (6) to rotate along the first axis (30). During the rotation of the trigger lever (6), two movements will occur simultaneously. One of them is that the medicine changing lever (5) rotates around the second axis (31) on the trigger lever (6) under the action of the torsion spring (4). The end of the medicine changing lever (5) pushes the ratchet (9) on the medicine storage wheel (8), causing the medicine storage wheel (8) to rotate around the second axis (31) on the trigger lever (6). The central axis (10) rotates 60 degrees to replace the medicine column; at the same time, another movement is that during the rotation of the trigger rod (6), the connecting rod (1) rotates around the third axis (34), which drives the push plug (7) fixed to the connecting rod (1) to lift up, and the compression spring (3) is compressed. When the medicine storage wheel (8) completes the medicine column replacement, the first paddle (32) on the trigger rod (6) will pass the second paddle (33) on the connecting rod (1). At this time, under the action of the compression spring (3), the connecting rod (1) rotates in the opposite direction around the third axis (34), which drives the push plug (7) fixed to the connecting rod (1) to fall back to the initial position with a certain speed, and puts the medicine storage wheel back into place. (8) The medicine column is pushed into the medicine delivery drawer (15); then, the slide motor (18) starts in reverse, driving the medicine delivery drawer (15), the linear rotary motor (16) and the lever (17) to move in the opposite direction until the medicine delivery drawer (15) reaches directly below the engine combustion chamber (14); during the linear movement of the slide motor (18), the lever (17) gradually disengages from the trigger lever (6), and the trigger lever (6) gradually returns to its initial position; during the process of the trigger lever (6) returning to its initial position, the first lever (32) passes over the second lever (33), and the medicine changing lever (5) returns to its initial position under the action of the torsion spring (4);When the delivery drawer (15) reaches directly below the engine combustion chamber (14), the linear motion function of the linear rotary motor (16) is activated, pushing the delivery drawer (15) into the engine combustion chamber (14). Next, the rotation function of the linear rotary motor (16) is activated, rotating the delivery drawer (15) so that the delivery drawer blades (24) disengage from the engine combustion chamber blades (23), providing pre-tightening force for the rubber ring seal in the rubber ring groove (21). An arc-shaped groove (26) is provided below the delivery drawer blades (24) to reduce friction during rotation. Then, engine ignition can be performed, and this process can be repeated to provide multiple pulse thrusts.

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