A water supply device for a metal fuel engine

Abstract

This invention discloses a water supply device for a metallic fuel engine, specifically relating to the field of metallic fuel engine technology. It includes a support frame, a water spray device, and a water supply pipe. The support frame is connected to the combustion chamber shell. The water spray device is fixedly connected to the support frame. The water supply pipe is connected and communicates with the water spray device. The end face of the water spray device near the propellant combustion surface has multiple oxidizer spray holes. Multiple working fluid spray holes are circumferentially arranged on the side wall of the water spray device. Multiple supplementary water spray hole groups are axially arranged on the side wall of the water supply pipe. Each supplementary water spray hole group includes multiple supplementary water spray holes, which are evenly distributed circumferentially along the side wall of the water supply pipe. The propellant is sleeved on the outside of the water supply pipe, with the inner side wall of the propellant tightly fitted to the outer side wall of the water supply pipe, effectively sealing the supplementary water spray holes. This invention ensures the mixing distance between the metallic fuel propellant combustion surface and the water spray holes, improving propellant combustion efficiency. It has a simple structure and saves costs.

Description

Technical Field

[0001] This invention relates to the field of metal fuel engine technology, and in particular to a water supply device for a metal fuel engine. Background Technology

[0002] Metal fuel engines use metal fuel as propellant, which has high energy density. They also use external water as an oxidant, which reduces the oxidant content in the propellant. This significantly improves the specific impulse and energy density of the propellant, thereby enhancing engine performance.

[0003] Water entering the combustion chamber serves two purposes: first, it acts as an oxidant to react with the metallic fuel; second, it provides the working fluid for the engine. The different functions of the water intake require control and distribution through a water intake system. Sufficient water must be sprayed onto the propellant combustion surface to react with the propellant; otherwise, the propellant's combustion efficiency will decrease, and the engine will be unable to generate the intended thrust. Currently, most metallic fuel engines employ a secondary water intake system, distributing water through primary and secondary water intake holes. However, the positions of the water intake holes in the combustion chamber are fixed. After prolonged combustion, the propellant combustion surface gradually shifts backward. The distance between the metallic fuel propellant combustion surface and the fixed water injection hole becomes greater than the mixing distance, leading to incomplete combustion of the metallic fuel. Furthermore, the piping structure required for a two-stage water intake system is complex and costly. Summary of the Invention

[0004] The purpose of this invention is to provide a water supply device for a metal fuel engine to solve the problems existing in the prior art. It can ensure the mixing distance between the combustion surface of the metal fuel propellant and the water injection hole, improve the combustion efficiency of the propellant, and has a simple structure and saves costs.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a water supply device for a metal fuel engine, including a bracket, a water spraying device, and a water supply pipe. The bracket is used to connect to the combustion chamber shell, the water spraying device is fixedly connected to the bracket, and the water supply pipe is connected and communicates with the water spraying device. The end face of the water spraying device near the propellant combustion surface is provided with multiple oxidizer spray holes, and the side wall of the water spraying device is provided with multiple working fluid spray holes circumferentially. The side wall of the water supply pipe is provided with multiple supplementary water spray hole groups axially, each supplementary water spray hole group including multiple supplementary water spray holes, and the multiple supplementary water spray holes are evenly distributed circumferentially along the side wall of the water supply pipe. The propellant is sleeved on the outside of the water supply pipe, and the inner side wall of the propellant is tightly fitted to the outer side wall of the water supply pipe and can block the supplementary water spray holes.

[0007] Preferably, the axis of the oxidant spray hole is parallel to the axis of the water supply pipe, the axis of the working fluid spray hole is perpendicular to the axis of the water supply pipe, and the axis of the supplementary spray hole is at an angle to the axis of the water supply pipe.

[0008] Preferably, the bracket includes an annular support and multiple support plates. The annular support is connected to the combustion chamber shell. One end of each support plate is fixedly connected to the inner wall of the annular support, and the other end is fixedly connected to the outer wall of the water spray device. The multiple support plates are evenly distributed between the annular support and the water spray device.

[0009] Preferably, the outer wall of the annular support is threadedly connected to the inner wall of the combustion chamber housing.

[0010] Preferably, the water spraying device is integrally formed with the support plate, and the water spraying device is welded and fixed to the annular support.

[0011] Preferably, the number of working fluid spray holes and the number of support plates are the same, and the working fluid spray holes and the support plates are staggered along the circumferential direction of the side wall of the spray device.

[0012] Preferably, it also includes a sealing ring for sealing the gap between the water supply pipe and the water spraying device.

[0013] The present invention achieves the following technical effects compared to the prior art:

[0014] This invention provides a water supply device for a metallic fuel engine. The oxidizer spray holes of the water spray device provide oxidizer for propellant combustion, and these holes are located on the end face of the water spray device near the propellant combustion surface, allowing water to be sprayed directly onto the propellant combustion surface for thorough mixing of the water and fuel. The working fluid spray holes of the water spray device provide working fluid for the engine. The working fluid spray holes are circumferentially arranged on the sidewall of the water spray device, allowing water to be sprayed around the combustion chamber, resulting in more uniform mixing of the combustion gas and working fluid within the engine. As the propellant burns, the distance between the combustion surface and the oxidizer spray holes gradually increases. When the combustion surface of the propellant moves to the supplementary water inlet, some water is sprayed out from the supplementary water inlet, acting as an oxidizer to react with the propellant, ensuring that the mixing distance between the propellant combustion surface and the water inlet is within the optimal range, thereby improving the propellant combustion efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the water supply device for the metal fuel engine of the present invention;

[0017] Figure 2 This is a schematic diagram of the water spray device and support of the water supply device for the metal fuel engine of the present invention.

[0018] In the diagram: 1. Water spray device; 2. Oxidant spray nozzle; 3. Working fluid spray nozzle; 4. Support plate; 5. Annular support; 6. Water supply pipe; 7. Supplementary spray nozzle; 8. Propellant; 9. Combustion chamber shell. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The purpose of this invention is to provide a water supply device for a metal fuel engine to solve the problems existing in the prior art. It can ensure the mixing distance between the combustion surface of the metal fuel propellant and the water injection hole, improve the combustion efficiency of the propellant, and has a simple structure and saves costs.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] This invention provides a water supply device for a metal fuel engine, such as... Figure 1As shown, the device includes a support, a water spray device 1, and a water supply pipe 6. The support is used to connect to the combustion chamber shell 9. The water spray device 1 is fixedly connected to the support. The water supply pipe 6 is connected to and communicates with the water spray device 1. The end face of the water spray device 1 near the combustion surface of the propellant 8 is provided with multiple oxidizer water spray holes 2. The side wall of the water spray device 1 is provided with multiple working fluid water spray holes 3 circumferentially. The side wall of the water supply pipe 6 is provided with multiple sets of supplementary water spray holes 7 axially. The sets of supplementary water spray holes 7 include multiple supplementary water spray holes 7, and the multiple supplementary water spray holes 7 are evenly distributed circumferentially along the side wall of the water supply pipe 6. The propellant 8 is sleeved on the outside of the water supply pipe 6. The inner side wall of the propellant 8 is tightly fitted with the outer side wall of the water supply pipe 6 and can block the supplementary water spray holes 7. The water spray device 1 is located on the combustion surface side of the propellant 8. The water spray device 1 sprays water supplied by the water supply pipe 6 into the combustion chamber through oxidizer spray holes 2 and working fluid spray holes 3. The oxidizer spray holes 2 of the water spray device 1 provide oxidizer for the combustion of the propellant 8, and are positioned on the end face of the water spray device 1 near the combustion surface of the propellant 8, allowing water to be sprayed directly onto the combustion surface of the propellant 8, ensuring thorough mixing of the water and fuel. The working fluid spray holes 3 of the water spray device 1 provide working fluid to the engine, increasing engine thrust. The working fluid spray holes 3 are circumferentially arranged on the side wall of the water spray device 1, enabling… Water is sprayed around the combustion chamber to make the combustion gas and working fluid in the engine mix more evenly. As the propellant 8 burns, the distance between the burning surface and the oxidizer water injection hole 2 gradually increases. When the burning surface of the propellant 8 moves to the water inlet hole, some water is sprayed out from the water inlet hole and reacts with the propellant 8 as an oxidizer. The water inlet hole is used to reduce the mixing distance, so as to ensure that the mixing distance between the burning surface of the propellant 8 and the water inlet is within the optimal range. This avoids the problem of the combustion efficiency decreasing due to the increased distance between the propellant 8 and the water inlet at the end of the long combustion period, and ensures the combustion efficiency of the propellant 8.

[0023] In a further preferred embodiment of the present invention, the axis of the oxidizer spray hole 2 is parallel to the axis of the water supply pipe 6. The oxidizer spray hole 2 can spray water directly onto the combustion surface of the propellant 8, and the number and diameter of the oxidizer spray hole 2 can be calculated according to the combustion requirements of the propellant 8 to ensure that the propellant 8 has sufficient oxidizer for combustion. The axis of the working fluid spray hole 3 is perpendicular to the axis of the water supply pipe 6, and the spray direction of the working fluid spray hole 3 is perpendicular to the spray direction of the oxidizer spray hole 2. It can spray water around the combustion chamber to make the combustion gas and working fluid in the engine more uniformly mixed. The axis of the supplementary spray hole 7 is at an angle to the axis of the water supply pipe 6. The supplementary spray hole 7 with its oblique cut hole can spray water onto the combustion surface of the propellant 8. In practical applications, the angle, diameter, and position of the supplementary inlet hole on the water supply pipe 6 can be adjusted according to the length of the propellant 8 and the required amount of supplementary water to ensure that the propellant 8 can be fully mixed with the oxidizer at different combustion times, thereby improving the combustion efficiency of the propellant 8 and enhancing engine performance.

[0024] In a further preferred embodiment of the present invention, as shown in the example below... Figure 2 As shown, the support includes an annular support 5 and multiple support plates 4. The annular support 5 is connected to the combustion chamber shell 9. One end of each support plate 4 is fixedly connected to the inner wall of the annular support 5, and the other end is fixedly connected to the outer wall of the water spray device 1. The multiple support plates 4 are evenly distributed between the annular support 5 and the water spray device 1. This provides support for the water spray device 1 and also serves as a limiter to fix the position of the water spray device 1. Furthermore, the total cross-sectional area of ​​the support plates is relatively small compared to the combustion surface area, so it does not obstruct the flow of combustion gases.

[0025] In a further preferred embodiment of the present invention, the outer wall of the annular support 5 is threadedly connected to the inner wall of the combustion chamber housing 9. Depending on the needs of different engines, threads are designed at appropriate positions inside the combustion chamber housing 9. After determining the position of the annular support 5, the water injection device 1 can be fixed to allow for the design of a suitable water inlet distance.

[0026] In a further preferred embodiment of the present invention, the water spraying device 1 is integrally formed with the support plate 4, and the water spraying device 1 is welded and fixed to the annular support 5 to improve the structural strength.

[0027] In a further preferred embodiment of the present invention, the number of working fluid spray holes 3 and support plates 4 are the same, and the working fluid spray holes 3 and support plates 4 are staggered along the circumferential direction of the side wall of the spray device 1.

[0028] In a further preferred embodiment of the present invention, the water supply device of the metal fuel engine further includes a sealing ring, which is used to seal the gap between the water supply pipe 6 and the water spray device 1 to improve the sealing performance.

[0029] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A water supply device for a metal fuel engine, characterized in that: The device includes a support frame, a water spraying device, and a water supply pipe. The support frame is used to connect to the combustion chamber shell. The water spraying device is fixedly connected to the support frame. The water supply pipe is connected to and communicates with the water spraying device. The end face of the water spraying device near the propellant combustion surface is provided with multiple oxidizer spray holes. The side wall of the water spraying device is provided with multiple working fluid spray holes circumferentially. The side wall of the water supply pipe is provided with multiple supplementary water spray hole groups axially. The supplementary water spray hole groups include multiple supplementary water spray holes, and the multiple supplementary water spray holes are evenly distributed circumferentially along the side wall of the water supply pipe. The propellant is sleeved on the outside of the water supply pipe. The inner side wall of the propellant is tightly fitted to the outer side wall of the water supply pipe and can block the supplementary water spray holes. When the combustion surface of the propellant moves to the supplementary water spray hole, part of the water supply is sprayed out from the supplementary water spray hole and reacts with the propellant as an oxidizer.

2. The water supply device for a metal fuel engine according to claim 1, characterized in that: The axis of the oxidant spray hole is parallel to the axis of the water supply pipe, the axis of the working fluid spray hole is perpendicular to the axis of the water supply pipe, and the axis of the supplementary spray hole is at an angle to the axis of the water supply pipe.

3. The water supply device for a metal fuel engine according to claim 1, characterized in that: The bracket includes an annular support and multiple support plates. The annular support is connected to the combustion chamber shell. One end of each support plate is fixedly connected to the inner wall of the annular support, and the other end is fixedly connected to the outer wall of the water spray device. The multiple support plates are evenly distributed between the annular support and the water spray device.

4. The water supply device for a metal fuel engine according to claim 3, characterized in that: The outer wall of the annular support is threadedly connected to the inner wall of the combustion chamber shell.

5. The water supply device for a metal fuel engine according to claim 3, characterized in that: The water spraying device is integrally formed with the support plate, and the water spraying device is welded and fixed to the annular support.

6. The water supply device for a metal fuel engine according to claim 3, characterized in that: The number of working fluid spray holes and the number of support plates are the same, and the working fluid spray holes and the support plates are staggered along the circumferential direction of the side wall of the spray device.

7. The water supply device for a metal fuel engine according to claim 1, characterized in that: It also includes a sealing ring, which is used to seal the gap between the water supply pipe and the water spray device.

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