Propulsion engine based on fuel gas generator

Abstract

The utility model provides a propulsion engine based on a fuel gas generator, which belongs to the field of fire-fighting equipment and comprises a spray pipe, a charging cabin is arranged on one side of the spray pipe, a front plug is arranged at one end, far away from a body, of the charging cabin, a booster is arranged on one side of the front plug, and a water storage flow guide cabin is arranged in the body. Through the arrangement of the charging cabin, the front plug, the booster, the water storage flow guide cabin, the water storage box, the water bag, the exciter and the fuel gas generator, the exciter discharges electricity to ignite the fuel gas generator in the using process, and the fuel gas generator instantly generates a large amount of high-pressure and high-temperature gas to be jetted along a preset path; the water bag in the water storage box is broken in the process that high-temperature and high-pressure gas is sprayed along the inner wall of the spraying pipe, the high-temperature and high-pressure gas is instantly generated to push out water flow to be sprayed out from the rear end of the spraying pipe, and the problem that an original fire-fighting bomb is too large in launching overturning force and prone to causing instability of a flying carrier is solved.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting equipment, and more specifically, to a propulsion engine based on a gas generator. Background Technology

[0002] With the rapid development of drone technology, firefighting drones are increasingly widely used in the field of fire suppression, especially in high-temperature fire environments where direct contact is not possible. However, traditional fire-fighting projectile launching systems often have some technical problems. Ordinary gunpowder rocket-type fire extinguishing projectiles pose a risk of secondary explosions, posing a threat to people's lives and property. Other launching methods generate excessive overturning forces on the vehicle during launch, making it difficult to guarantee the stability of the aircraft and easily leading to flight loss of control, or even crashes or damage. Current fire-fighting projectile launching devices also have the following shortcomings in use:

[0003] Current fire-fighting projectile launchers typically employ high-thrust and high-power gas generators. The high-temperature, high-pressure gas generated during this high-energy release process not only exerts excessive overturning force on the launch vehicle but may also pose safety hazards during launch. Furthermore, the jetting of high-temperature gas can cause thermal damage to the internal structure of the launch vehicle, reducing the system's safety and reliability. Therefore, a propulsion engine based on a gas generator is proposed. Utility Model Content

[0004] The purpose of this invention is to address the problem that existing fire-fighting projectile launching devices typically employ high thrust and high-power gas generators. The high-temperature and high-pressure gas generated during this high-energy release process not only exerts excessive overturning force on the launch vehicle but may also pose safety hazards during launch. Furthermore, the jetting of high-temperature gas may cause thermal damage to the internal structure of the launch vehicle, reducing the safety and reliability of the system.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0006] The present invention is as follows: a propulsion engine based on a gas generator, including a nozzle, a propellant chamber provided on one side of the nozzle, a front plug provided at the end of the propellant chamber away from the main body, a booster provided on one side of the front plug, a water storage and diversion chamber provided inside the main body, and an igniter and a gas generator inside the booster.

[0007] As a preferred technical solution of this utility model, the front half of the body is a structure that shrinks from large to small towards the middle to a narrow throat, and then expands outward from small to large towards the base of the arrow.

[0008] As a preferred technical solution of this utility model, the booster has a rotating body profile, with a cylindrical boss at the front end connecting to the projectile and a threaded feature at the rear end connecting to the main body, and a gas generating device is provided inside.

[0009] As a preferred technical solution of this utility model, a water storage box is provided on one side of the booster. The water storage box has the characteristics of a non-uniform diameter rotating cylindrical structure, and a water bag is provided inside the water storage box.

[0010] As a preferred technical solution of this utility model, a plurality of connection holes are provided on the side wall of the loading chamber near the main body, and the plurality of connection holes are distributed circumferentially along the central axis of the loading chamber.

[0011] As a preferred technical solution of this utility model, the water bag is made of polyvinyl chloride.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] The system consists of a propellant chamber, a front plug, a booster, a water storage and diversion chamber, a water storage box, a water bag, an igniter, and a gas generator. During use, the igniter discharges and ignites the gas generator, which instantly generates a large amount of high-pressure, high-temperature gas that is ejected along a predetermined path (nozzle). The water bag in the water storage box is ruptured as the high-pressure gas is ejected along the inner wall of the nozzle, instantly generating high-pressure gas that pushes water out from the rear of the nozzle. This generates thrust in the opposite direction, propelling the projectile to complete the launch. Compared to conventional sealed launch methods, the projectile's rear end is open, resulting in minimal interaction between the projectile and the launcher. Therefore, it has minimal impact on the UAV and launcher. Furthermore, the water flow effectively prevents high-temperature gas from causing thermal damage to the vehicle. This solves the problem of excessive overturning force in traditional fire extinguishing projectiles, which easily leads to instability in the flight vehicle. This improves the adaptability of the fire extinguishing projectile to different environments, reduces vehicle requirements, and lowers the cost of the UAV-based fire extinguishing projectile system. Attached Figure Description

[0014] Figure 1 This utility model provides a structural schematic diagram of a propulsion engine based on a gas generator.

[0015] The diagram shows: 1. Nozzle; 2. Propellant chamber; 3. Front plug; 4. Booster; 5. Water storage and diversion chamber; 6. Water storage box; 7. Water bag; 8. Connection hole. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0017] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0018] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] like Figure 1 As shown, this embodiment proposes a propulsion engine based on a gas generator, including a nozzle 1, a propellant chamber 2 on one side of the nozzle 1, a front plug 3 at the end of the propellant chamber 2 away from the main body, a water storage and guide chamber 5 inside the main body, and a booster 4 containing an igniter and a gas generator. The igniter is located on one side of the front plug 3. When in use, the igniter can discharge and ignite the gas generator. The gas generator instantaneously generates a large amount of high-pressure, high-temperature gas that is ejected along the nozzle 1 to provide thrust to the projectile. When in use, the nozzle 1 is used to guide the ejected fluid, the propellant chamber 2 is used to load the propulsion fuel, and the material in the propellant chamber 2 will be ejected through the nozzle 1 to provide thrust. The front plug 3 is used to seal the opening of the propellant chamber 2 to ensure that the material in the propellant chamber 2 does not leak out during operation. The booster 4 is used to provide the propulsion effect, and the water storage chamber is used to store water, participate in the propulsion process, and prevent overheating through cooling.

[0021] like Figure 1 As shown, the front half of the body is a structure that narrows towards the middle to form a narrow throat, and then expands outwards towards the base of the nozzle. This design allows the gas flow velocity to be increased to supersonic levels. According to the principles of gas dynamics, when gas enters the narrow throat from a wide region, its flow velocity increases while its pressure decreases. This process conforms to the characteristics of isentropic expansion, which can significantly increase the kinetic energy of the gas. After the narrow throat, the nozzle 1 expands outwards towards the base of the nozzle. This expansion structure allows the high-speed gas flow to expand, further increasing the gas flow velocity and converting the gas's thermal energy into kinetic energy to maximize propulsion.

[0022] The booster 4 has a rotating body profile, with a cylindrical boss at the front end that connects to the projectile and a threaded feature at the rear end that connects to the main body. It also has a gas generating device inside. The cylindrical boss at the front end of the booster 4 helps to connect with the projectile and ensures a fixed connection between the projectile and the booster 4. The threaded connection at the rear end allows for an effective connection between the nozzle 1 and the booster 4, enhancing the overall structural stability.

[0023] A water storage box 6 is provided on one side of the booster 4. The water storage box 6 has the characteristics of a non-uniform diameter rotating cylindrical structure. A water bag 7 is provided inside the water storage box 6. The water bag 7 inside the water storage box 6 will be ruptured under the action of high temperature and high pressure gas. As the gas is ejected along the inner wall of the nozzle 1, the water bag 7 will rupture instantly, and the thrust generated by the water flow in the water bag 7 will be used to propel the projectile to complete the launch.

[0024] Several connection holes 8 are provided on the side wall of the charge chamber 2 near the main body. The connection holes 8 are distributed circumferentially along the central axis of the charge chamber 2. The connection holes 8 are used to connect the charge chamber 2 to the main body.

[0025] The water bag 7 is made of polyvinyl chloride (PVC). PVC has poor heat resistance and can generally only withstand temperatures of 60°C-70°C. Beyond this range, it will soften and lose its structural strength. Under the impact of high-pressure gas, the water bag 7 is prone to rupture, thus reducing the occurrence of malfunctions.

[0026] Specifically, when this propulsion engine based on a gas generator is in use: the igniter discharges and ignites the gas generator, which instantly generates a large amount of high-pressure, high-temperature gas that is ejected along the nozzle 1. The water bag 7 in the water tank 6 is ruptured during the process of the high-temperature, high-pressure gas being ejected along the inner wall of the nozzle 1, instantly generating high-temperature, high-pressure gas and ejecting water from the rear end of the nozzle 1. Through the coordinated work of the gas generator, nozzle 1, booster 4, water tank 6, and igniter, a large amount of thrust can be generated in a short time, rapidly launching the projectile. The design of the nozzle 1 allows the gas to be effectively accelerated after being ejected under high temperature and pressure, while the design of the booster 4 and water tank 6 ensures the effective generation of gas and the utilization of water, further enhancing the output of propulsion.

[0027] All technical features in this embodiment can be freely combined according to actual needs.

[0028] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A propulsion engine based on a gas generator, comprising a nozzle (1), characterized in that, A charge chamber (2) is provided on one side of the nozzle (1). A front plug (3) is provided at the end of the charge chamber (2) away from the main body. A booster (4) is provided on one side of the front plug (3). A water storage and diversion chamber (5) is provided inside the main body. The booster (4) contains an activator and a gas generator.

2. The propulsion engine based on a gas generator according to claim 1, characterized in that, The front half of the body is a structural feature where it shrinks from large to small towards the middle to a narrow throat, and then expands outward from small to large towards the base of the arrow.

3. The propulsion engine based on a gas generator according to claim 1, characterized in that, The booster (4) has a rotating body profile, with a cylindrical boss at the front end connecting to the projectile and a threaded feature at the rear end connecting to the main body, and a gas generating device is installed inside.

4. A propulsion engine based on a gas generator according to claim 1, characterized in that, A water storage box (6) is provided on one side of the booster (4). The water storage box (6) has the characteristics of a non-uniform diameter rotating cylindrical structure. A water bag (7) is provided inside the water storage box (6).

5. A propulsion engine based on a gas generator according to claim 1, characterized in that, The loading chamber (2) has several connection holes (8) on its side wall near the main body, and the connection holes (8) are distributed circumferentially along the central axis of the loading chamber (2).

6. A propulsion engine based on a gas generator according to claim 4, characterized in that, The water bag (7) is made of polyvinyl chloride.

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