An engine and a method of manufacturing the same

Abstract

The application discloses an engine and a manufacturing method thereof. The engine comprises a shell, an inner cylinder, a fuel containing cavity, an injection hole, and an air intake flow regulation cone. The inner cylinder is sleeved in the shell, and the outer wall of the inner cylinder and the inner wall of the shell form a combustion chamber. The fuel containing cavity is arranged in the inner cylinder, and the injection hole is arranged on the inner cylinder and communicates the fuel containing cavity and the combustion chamber. The larger end of the air intake flow regulation cone is connected with the end of the inner cylinder facing the air inlet of the engine. The end of the shell facing the air inlet of the engine is provided with a guide inclined part. The guide inclined part is inclined to the direction close to the air intake flow regulation cone along the direction from the air inlet to the air outlet of the engine. Therefore, the external gas can enter the engine smoothly under the guidance of the air intake flow regulation cone and the guide inclined part, and the air intake is facilitated. The shell, the guide inclined part, the inner cylinder and the air intake flow regulation cone are integrally connected through additive manufacturing, so that the assembly of various components is avoided, and the installation is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerospace equipment, in particular to an engine and a manufacturing method thereof. BACKGROUND

[0002] The continuous rotating detonation ramjet engine can fully exert the performance advantage of detonation combustion, and thus has been applied more and more widely.

[0003] The continuous rotating detonation ramjet engine utilizes the self-pressurization advantage of detonation combustion, effectively improves the performance of the ramjet engine, and simplifies the structure of the entire ramjet engine system.

[0004] However, the current continuous rotating detonation ramjet engine has complex connection between components. In addition, it also faces the problem of inconvenient air intake. SUMMARY

[0005] Therefore, a first object of the present application is to provide an engine, which aims to facilitate the connection between components of the engine and facilitate the air intake of the engine.

[0006] A second object of the present application is to provide a manufacturing method of the engine.

[0007] In order to achieve the above-mentioned first object, the present application provides the following solutions:

[0008] An engine, comprising:

[0009] a shell;

[0010] an inner cylinder, which is sleeved in the shell, and the outer wall of the inner cylinder and the inner wall of the shell surround a combustion chamber, a fuel containing cavity is arranged in the inner cylinder, and an injection hole communicating the fuel containing cavity and the combustion chamber is further arranged on the inner cylinder;

[0011] a gas intake flow regulation cone, the larger end of the gas intake flow regulation cone is connected with the end of the inner cylinder facing the air inlet of the engine, the end of the shell facing the air inlet of the engine is provided with a guide inclined part, the guide inclined part is inclined to the direction close to the gas intake flow regulation cone along the direction from the air inlet to the air outlet of the engine,

[0012] the shell, the guide inclined part, the inner cylinder and the gas intake flow regulation cone are integrally connected by additive manufacturing.

[0013] In a specific embodiment, one of the outer wall of the inner cylinder and the inner wall of the shell is provided with a positioning pin, and the other is provided with a positioning groove for fixing the positioning pin.

[0014] In another specific embodiment, the outer side of the guide slope and the inner side of the guide slope are both inclined surfaces, and the outer side of the guide slope and the inner side of the guide slope are connected at the end away from the shell.

[0015] In another specific embodiment, the engine further comprises a partition plate arranged in the inner cylinder;

[0016] The partition plate, the inner wall of the inner cylinder and the air intake flow cone surround the fuel holding cavity;

[0017] In the direction from the air inlet to the air outlet of the engine, the injection hole is arranged in a direction away from the axis of the inner cylinder, the inlet of the injection hole is arranged on the partition plate, and the outlet of the injection hole penetrates the inner cylinder;

[0018] The first part of the inner cylinder between the partition plate and the air intake flow cone and the inner wall of the shell surround the air inlet channel;

[0019] The second part of the inner cylinder away from the air intake flow cone and the shell surround the combustion chamber.

[0020] In another specific embodiment, the number of injection holes is multiple, and they are evenly distributed along the axis of the inner cylinder.

[0021] In another specific embodiment, the partition plate and the inner cylinder are integrally connected by additive manufacturing.

[0022] In another specific embodiment, the engine further comprises an air outlet flow cone;

[0023] The larger end of the air outlet flow cone is connected to the end of the inner cylinder away from the air intake flow cone;

[0024] The outer wall of the air outlet flow cone and the inner wall of the shell surround the tail nozzle.

[0025] In another specific embodiment, the air outlet flow cone and the inner cylinder are integrally connected by additive manufacturing.

[0026] In another specific embodiment, at least part of the end of the shell facing the exhaust port of the engine is inclined towards the air outlet flow cone.

[0027] According to various embodiments of the present application, they can be combined as needed, and the resulting embodiments after the combination are also within the scope of the present application and are part of the specific embodiments of the present application.

[0028] The engine provided by the application is integrally formed by additive manufacturing of the shell, the guide inclined part, the inner cylinder and the air intake flow cone, so that the assembly of various parts is avoided, and the installation is facilitated.

[0029] In order to achieve the second object, the application provides the following scheme.

[0030] A manufacturing method of an engine comprises the following steps.

[0031] The overall structure and layout form of the engine are determined according to the performance index of the engine to be manufactured.

[0032] The design of various parts of the engine is completed according to the weight reduction, strength, cooling and additive manufacturing process of the engine, and the drawing of the engine parts and the overall model is completed through three-dimensional drawing software.

[0033] The designed engine model is imported into simulation software, the engine working parameters are set, and simulation calculation is performed, so that the required data are finally obtained.

[0034] The data obtained through numerical simulation calculation are used for processing and manufacturing, so that the engine to be manufactured is obtained.

[0035] The manufacturing method of the engine provided by the application obtains the data of the engine through simulation, and facilitates the processing and manufacturing of the engine. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0037] Figure 1 The cross-sectional structure diagram of the engine provided by the application is shown.

[0038] Among them, Figure 1 Among them,

[0039] The engine 1000, the shell 100, the inner cylinder 200, the combustion chamber 300, the injection hole 202, the air inlet flow straightener 400, the guide inclined part 101, the positioning pin 203, the positioning groove 102, the partition plate 500, the air inlet channel 600, the air outlet flow straightener 700, the tail nozzle 800, and the annular groove 204. DETAILED DESCRIPTION

[0040] In the following, the technical solutions in the embodiments of the present application will be described in detail with reference to the accompanying drawings. Figure 1 It should be apparent that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the terms "upper", "lower", "top surface", "bottom surface", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In combination with the drawings, Figure 1 The first aspect of the present application provides an engine 1000, which facilitates the connection between various components of the engine 1000 and facilitates the air intake of the engine 1000.

[0043] The engine 1000 comprises a shell 100, an inner cylinder 200, and an air inlet flow straightener 400, and the shell 100, the guide inclined part 101, the inner cylinder 200, and the air inlet flow straightener 400 are integrally connected by additive manufacturing, which facilitates the connection.

[0044] In order to realize the uniformity of air intake, combustion, and exhaust of the engine 1000, the present application discloses that the shell 100 and the inner cylinder 200 are both rotary body structures, and the shell 100, the inner cylinder 200, and the air inlet flow straightener 400 are coaxially arranged.

[0045] The inner cylinder 200 is sleeved in the shell 100, and the outer wall of the inner cylinder 200 and the inner wall of the shell 100 form the combustion chamber 300.

[0046] The inner cylinder 200 is provided with a fuel holding cavity for holding fuel. The inner cylinder 200 is also provided with an injection hole 202 communicating the fuel holding cavity and the combustion chamber 300, and fuel is injected into the combustion chamber 300 through the injection hole 202 for combustion.

[0047] The larger end of the intake rectifier cone 400 is connected to the end of the inner cylinder 200 facing the air intake of the engine 1000. The outer casing 100 is provided with a guide tilting part 101 facing the air intake of the engine 1000. The guide tilting part 101 is tilted towards the intake rectifier cone 400 along the direction from the air intake to the air outlet of the engine 1000. External gas can smoothly enter the engine 1000 under the guidance of the intake rectifier cone 400 and the guide tilting part 101, which facilitates air intake.

[0048] In some embodiments, the outer wall of the inner cylinder 200 and the inner wall of the outer shell 100 are provided with a positioning pin 203 on one side and a positioning groove 102 for fixing the positioning pin 203 on the other side.

[0049] like Figure 1 As shown, the inner wall of the outer shell 100 is provided with a positioning groove 102, and the outer wall of the inner cylinder 200 is provided with a positioning pin 203. The positioning groove 102 and the positioning pin 203 are provided in a one-to-one correspondence. It can be understood that the number of positioning grooves 102 and positioning pins 203 is not limited to one. In order to improve the stability of the inner cylinder 200, the present invention discloses that the number of positioning pins 203 and positioning grooves 102 is at least two. The positioning pins 203 are evenly distributed along the axis of the inner cylinder 200 on the outer wall of the inner cylinder 200, and the positioning grooves 102 are evenly distributed along the axis of the outer shell 100 on the inner wall of the outer shell 100.

[0050] In some embodiments, both the outer and inner surfaces of the guide tilt portion 101 are inclined surfaces, and the outer and inner surfaces of the guide tilt portion 101 are connected at the end away from the housing 100. For example... Figure 1 As shown, the cross-section of the guide tilt portion 101 is triangular. The arrangement of the guide tilt portion 101 also avoids the wall thickness direction of the outer casing 100 from obstructing the external gas, reduces the intake resistance of the engine 1000, and further facilitates the entry of gas into the engine 1000.

[0051] In some embodiments, the engine 1000 further includes a baffle 500 disposed within the inner cylinder 200, the baffle 500, the inner wall of the inner cylinder 200, and the intake rectifier cone 400 forming a fuel holding cavity. It should be noted that, in order to reduce the overall weight of the engine 1000, the intake rectifier cone 400 is a hollow mechanism, and the inner wall of the intake rectifier cone 400, the inner wall of the inner cylinder 200, and the baffle 500 together form the fuel holding cavity.

[0052] Along the direction from the air inlet to the air outlet of the engine 1000, the injection hole 202 is inclined in the direction away from the axis of the inner cylinder 200. The inlet of the injection hole 202 is opened on the partition plate 500, and the outlet of the injection hole 202 passes through the inner cylinder 200.

[0053] The inner cylinder 200 is located between the first part of the baffle 500 and the air inlet flow cone 400 and the inner wall of the outer shell 100 to form an air inlet channel 600.

[0054] The second part of the baffle 500 is located away from the air inlet flow cone 400 and the outer shell 100 to form a combustion chamber 300.

[0055] The wall surface of the outer wall of the inner cylinder 200 is at least one inclined surface, and along the direction from the air inlet to the air outlet of the engine 1000, the inclined surface is inclined towards the direction close to the axis of the inner cylinder 200, that is, along the direction from the air inlet to the air outlet of the engine 1000, the cross section of the combustion chamber 300 gradually increases, facilitating the gas to enter the combustion chamber 300.

[0056] The outlet of the injection hole 202 is located on the inclined surface, facilitating the uniform mixing of fuel and gas in the combustion chamber 300.

[0057] Further, the number of injection holes 202 is multiple, and is uniformly distributed along the axis of the inner cylinder 200, facilitating the uniform entry of fuel into the combustion chamber 300.

[0058] Further, the inner wall of the inner cylinder 200 is provided with an annular groove 204, and the baffle 500 is arranged on the side of the annular groove 204 away from the air inlet flow cone 400, facilitating the opening of the injection hole 202.

[0059] Further, the baffle 500 and the inner cylinder 200 are integrally connected by additive manufacturing, facilitating the connection.

[0060] In some embodiments, the engine 1000 further comprises an air outlet flow cone 700, the larger end of the air outlet flow cone 700 is connected to the end of the inner cylinder 200 away from the air inlet flow cone 400, the outer wall of the air outlet flow cone 700 and the inner wall of the outer shell 100 form a tail nozzle 800, and the combustion chamber 300 communicates with the tail nozzle 800, that is, the gas after combustion in the combustion chamber 300 is discharged through the tail nozzle 800.

[0061] Further, the air outlet flow cone 700 and the inner cylinder 200 are integrally connected by additive manufacturing, facilitating the connection.

[0062] Further, at least a part of the end of the outer shell 100 facing the exhaust port of the engine 1000 is inclined towards the direction close to the air outlet flow cone 700, avoiding the phenomenon of spillover of the gas discharged by the tail nozzle 800.

[0063] The second aspect of the present application provides a manufacturing method of an engine, for manufacturing the engine 1000 in any one of the above embodiments, comprising:

[0064] determining the overall structure and layout form of the engine 1000 according to the performance index of the engine 1000 to be manufactured;

[0065] designing each component of the engine 1000 according to the weight reduction, strength, cooling and additive manufacturing process of the engine 1000, and completing the drawing of each component and the overall model of the engine through three-dimensional drawing software;

[0066] importing the designed engine 1000 model into simulation software, setting the engine working parameters, and performing simulation calculation to finally obtain the required data;

[0067] processing and manufacturing according to the data value obtained by simulation calculation to obtain the engine 1000 to be manufactured.

[0068] Specifically, the simulation software can be a high-fidelity numerical simulation software, etc.

[0069] The manufacturing method of the engine provided by the present application obtains the data of the engine 1000 through simulation, which is convenient for the processing and manufacturing of the engine 1000.

[0070] In the description, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between each embodiment can be referred to each other.

[0071] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and inventive features disclosed herein.

[0072] In the description of the present application, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0073] The preferred embodiments of the application disclosed above are only to facilitate the elucidation of the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments. Obviously, many modifications and variations can be made in light of the teachings above. The description is chosen and described in order to provide the best illustration of the application and its practical application to those skilled in the art and to enable those skilled in the art to best utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. An engine characterized by, The application relates to a fuel injection device for an engine, which comprises the following parts: a housing; an inner cylinder, which is sleeved in the housing, and the outer wall of the inner cylinder and the inner wall of the housing form a combustion chamber, a fuel storage cavity is arranged in the inner cylinder, and an injection hole, which is connected with the fuel storage cavity and the combustion chamber, is arranged on the inner cylinder; an air inlet flow regulation cone, the larger end of the air inlet flow regulation cone is connected with the end of the inner cylinder which faces the air inlet of the engine, the end of the housing which faces the air inlet of the engine is provided with a guide inclined part, the guide inclined part is inclined to the air inlet flow regulation cone along the direction from the air inlet to the air outlet of the engine, the housing, the guide inclined part, the inner cylinder and the air inlet flow regulation cone are integrally connected through additive manufacturing; the outer side of the guide inclined part and the inner side of the guide inclined part are both inclined surfaces, and the outer side of the guide inclined part and the inner side of the guide inclined part are connected at the end far from the housing; a partition plate arranged in the inner cylinder is further included; the partition plate, the inner wall of the inner cylinder and the air inlet flow regulation cone form the fuel storage cavity; the injection hole is arranged to be inclined to the direction away from the axis of the inner cylinder along the direction from the air inlet to the air outlet of the engine, the inlet of the injection hole is arranged on the partition plate, and the outlet of the injection hole penetrates the inner cylinder; the first part of the inner cylinder between the partition plate and the air inlet flow regulation cone and the inner wall of the housing form an air inlet channel; the second part of the inner cylinder far from the air inlet flow regulation cone and the housing form the combustion chamber; the number of the injection holes is multiple, and the injection holes are evenly distributed along the axis of the inner cylinder; the partition plate and the inner cylinder are integrally connected through additive manufacturing.

2. The engine of claim 1, wherein One of the outer wall of the inner cylinder and the inner wall of the housing is provided with a positioning pin, and the other is provided with a positioning groove for fixing the positioning pin.

3. The engine of claim 1 or 2, wherein an air outlet flow regulation cone is further included; the larger end of the air outlet flow regulation cone is connected with the end of the inner cylinder far from the air inlet flow regulation cone; the outer wall of the air outlet flow regulation cone and the inner wall of the housing form a tail nozzle.

4. The engine of claim 3, wherein the air outlet flow regulation cone and the inner cylinder are integrally connected through additive manufacturing.

5. The engine of claim 3, wherein at least a part of the end of the housing which faces the air outlet of the engine is inclined to the air outlet flow regulation cone.

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