An underwater oxygen-kerosene jet engine

Abstract

The present invention discloses an underwater oxygen-kerosene jet engine, comprising an outer shell component, a supply component, a combustion chamber component and a tail nozzle component; the characteristics are as follows: the outer shell component comprises an outer shell body, an upper cover plate and a lower cover plate, the two ends of the outer shell are mounting flanges, the upper cover plate and the lower cover plate are connected to the outer shell body flange by screws; the supply component comprises a kerosene supply pipe, an ignition kerosene supply pipe and an oxygen supply pipe; the combustion chamber component comprises an annular combustion chamber, a kerosene injection ring, a high-energy kerosene igniter and an oxygen-fuel secondary mixing cone; the tail nozzle component is fixed on the lower cover plate, and the tail nozzle component is a convergent nozzle with a bend in the range of 45° to 90° and an equal straight section nozzle. The present invention has a simple structure, omits a propeller device, and directly drives an underwater vehicle to sail at high speed by ejecting high-speed gas.

Description

Technical Field

[0001] The present invention relates to the field of underwater vehicle engines, in particular to an underwater oxygen-kerosene jet engine. Technical Background

[0002] As people's exploration of water bodies continues to advance, underwater vehicles are becoming more diverse, and underwater engines also have their own advantages. Underwater engines are the driving force behind underwater vehicles. With the continuous development of science and technology, people's requirements for the performance of underwater vehicles are becoming increasingly higher. For example, high speed, high thrust-to-weight ratio, economy, high efficiency, and simple structure are all a series of evaluation indicators. To enable underwater vehicles to meet more needs in complex underwater environments, the development of underwater engines is crucial.

[0003] Traditional underwater vehicle engines are propeller-driven, driving the propeller blades connected to the drive shaft to rotate, thereby propelling the entire underwater vehicle forward; another type of underwater vehicle engine is a water jet engine, which continuously sprays water entering from the front backward by doing work to provide power for the underwater vehicle; another type is a bionic underwater engine, such as imitating the tail fin of a fish, and uses swinging movements as power; the underwater engines mentioned above have large and complex structures, low power, and poor economic performance. Especially under special circumstances, it is difficult to provide sufficient power in a short period of time. In the later use process, regular maintenance is required, and the maintenance cost is high and the maintenance process is relatively complicated.

[0004] The present invention proposes an underwater oxygen-kerosene jet engine that, compared with existing underwater vehicle engines, omits the traditional propeller propulsion device and ejects high-speed gas through the engine tail nozzle to directly propel the underwater vehicle forward at high speed, which can effectively increase the navigation speed of underwater high-speed vehicles (such as torpedoes). Summary of the Invention

[0005] The object of the present invention is to provide an underwater oxygen-kerosene jet engine in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] The present invention includes an outer shell component, a supply component, a combustion chamber component and a tail nozzle component; the supply component includes a kerosene supply pipe, an ignition kerosene supply pipe and an oxygen supply pipe; the combustion chamber component includes an annular combustion chamber, a kerosene injection ring, a high-energy kerosene igniter and an oxygen-fuel gas secondary mixing cone.

[0008] Furthermore, the outer shell component includes an outer shell body, an upper cover plate, and a lower cover plate. Mounting flanges are provided at both ends of the outer shell body. The upper cover plate and the lower cover plate are connected to the outer shell body flanges by screws.

[0009] Furthermore, the annular combustion chamber is provided in the outer shell component, and a hole is opened on the surface of the outer shell component. The high-energy kerosene igniter is fixed to the outer wall of the annular combustion chamber through the hole, and the high-energy kerosene igniter is provided with the ignition kerosene supply pipe.

[0010] Furthermore, one end of the oxygen supply pipe is connected to an oxygen injector, which is arranged in a hole with a through screw. The oxygen injector is inserted into a preset hole in the upper cover plate. The oxygen injector is fixed to the upper cover plate by a through screw, and the end of the oxygen injector is close to the upper end surface of the annular combustion chamber.

[0011] Furthermore, the kerosene injection ring also includes a kerosene inlet pipe, a ring body and a kerosene injection needle. The kerosene supply pipe is arranged on the upper cover plate, the kerosene inlet pipe is connected to the kerosene supply pipe, and the kerosene injection needle is inserted into the evaporation tube evenly distributed in the annular combustion chamber.

[0012] Furthermore, the oxygen-gas secondary mixing cone is provided on the lower end surface of the annular combustion chamber. The oxygen-gas secondary mixing cone is a cone with openings at both ends. The oxygen-gas secondary mixing cone is provided with a contraction angle in the range of 5° to 30°. The diameter of the upper opening of the oxygen-gas secondary mixing cone is slightly larger than the diameter of the inner cavity of the annular combustion chamber. The upper opening of the oxygen-gas secondary mixing cone is connected to the inner cavity of the annular combustion chamber by interference fit.

[0013] Furthermore, the tail nozzle component is fixed on the lower cover plate, and the tail nozzle component includes a convergent nozzle with a bending angle ranging from 45° to 90° and a straight section nozzle. The length of the straight section nozzle can be lengthened or shortened according to actual installation conditions.

[0014] The beneficial effects of the present invention are:

[0015] 1. Compared with existing underwater vehicle engines, the present invention eliminates the traditional propeller propulsion device. High-speed gas is ejected through the engine tail nozzle, causing the engine to generate a force in the opposite direction of the engine gas jet, thereby propelling the underwater vehicle forward at high speed.

[0016] 2. The present invention omits the compressor and turbine on the basis of the existing turbojet engine, thus simplifying the structure. Kerosene burns with oxygen in the combustion chamber to produce high-temperature combustion gas, which is then secondary mixed and burned with oxygen in the oxygen-gas secondary mixing cone, thereby improving fuel combustion efficiency and saving fuel costs.

[0017] 3. The underwater oxygen-kerosene jet engine effectively converts the vertical downward high-speed airflow into the horizontal high-speed airflow, effectively solving the engine ignition problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a half-section schematic diagram of the overall assembly of the present invention.

[0020] Figure 3 It is an enlarged schematic diagram of the combustion chamber of the present invention.

[0021] The markings of the components in the accompanying drawings are as follows:

[0022] 1: Outer shell components, 11: Upper cover, 12: Lower cover, 13: Outer shell body; 2: Supply components, 21: Kerosene supply pipe, 22: Ignition kerosene supply pipe, 23: Oxygen supply pipe, 24: Oxygen injector, 25: Locknut; 3: Combustion chamber components, 31: Annular combustion chamber, 32: Evaporation tube, 34: Kerosene inlet pipe, 35: Injection ring, 36: Kerosene injection needle, 37: High-energy kerosene igniter, 38: Oxygen gas secondary mixing cone, 4: Tail nozzle components, 41: Convergent nozzle, 42: Straight section nozzle. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0024] like Figure 1-3 As shown, an underwater oxygen-kerosene jet engine in this embodiment includes an outer shell component 1, a supply component 2, a combustion chamber component 3 and a tail nozzle component; the supply component includes a kerosene supply pipe 21, an ignition kerosene supply pipe 22 and an oxygen supply pipe 23; the combustion chamber component 3 includes an annular combustion chamber 31, a kerosene injection ring, a high-energy kerosene igniter 37 and an oxygen-fuel secondary mixing cone 38; the working principle of the underwater oxygen-kerosene jet engine is: oxygen is supplied through the oxygen supply pipe 23, and the oxygen is evenly and quickly ejected into the combustion chamber through the oxygen injector 24, and the high-energy kerosene igniter 37 ignites the oxygen from the ignition kerosene supply pipe. The kerosene coming in from 22 preheats the inner cavity of the combustion chamber and the evaporation tube; at the same time, the kerosene supply pipe 21 continuously supplies oil to the kerosene inlet pipe 34, and the kerosene is further sprayed into the evaporation tube 32 at a high speed by the kerosene injection needles 36 evenly distributed on the injection ring body 35, and is quickly atomized and evaporated in the evaporation tube 32. The atomized and evaporated kerosene is quickly burned in the combustion chamber quickly, evenly, stably and efficiently, and the burned gas flows into the oxygen-gas secondary mixing cone 38. The fuel that is not fully burned is further burned with oxygen in the oxygen-gas secondary mixing cone 38, thereby improving the combustion efficiency, and the gas after the secondary combustion is ejected at a high speed through the tail nozzle component 4.

[0025] In this embodiment, the outer shell component 1 includes an outer shell body 13, an upper cover plate 11, and a lower cover plate 12. Mounting flanges are provided at both ends of the outer shell body 13. The upper cover plate 11 and the lower cover plate 12 are connected to the flanges of the outer shell body 13 by screws to ensure the airtightness and structural firmness of the overall underwater oxygen kerosene jet engine; the outer shell component 1 is provided with the annular combustion chamber 31, and the surface of the outer shell body 13 is provided with holes; the high-energy kerosene igniter 37 passes through the outer wall of the annular combustion chamber 31 through the hole, and the high-energy kerosene igniter 37 passes through the outer wall of the annular combustion chamber 31 through the hole, and the high-energy kerosene The ignition kerosene supply pipe 22 is provided on the igniter 37. The high-energy kerosene igniter 37 ignites the fuel provided by the ignition kerosene supply pipe 22 to preheat the entire combustion chamber cavity and the evaporation tube 32; one end of the oxygen supply pipe 23 is connected to an oxygen injector 24 to evenly spray oxygen into the outer shell component. The outlet of the oxygen injector 24 is provided with 3 to 8 radial injection holes with a diameter of 1 mm to 3 mm. The oxygen injector 24 is fixed to the preset hole on the upper cover plate 11 from the inside of the engine and the anti-loosening nut 25. The oxygen injector 24 is close to the upper end surface of the annular combustion chamber 31, and the close effect ensures that the oxygen flow ejected by the oxygen injector 24 forms a good oxygen concentration field; the kerosene injection ring includes a kerosene inlet pipe 34, an injection ring body 35 and a kerosene injection needle 36, the kerosene supply pipe 21 is arranged on the upper cover plate 11, the kerosene inlet pipe 34 is connected to the kerosene supply pipe 21, and the kerosene injection needle 36 is inserted into the evaporation pipe 32 evenly distributed in the annular combustion chamber 31, ensuring that the kerosene ejected by the kerosene injection needle 36 can be quickly evaporated and atomized in the evaporation pipe 32 to avoid kerosene burning in other areas; the oxygen combustion A secondary gas mixing cone 38 is located at the lower end of the annular combustion chamber 31 to ensure that all the combustion gases in the combustion chamber can flow to the next stage. The secondary oxygen and gas mixing cone 38 is a cone with openings at both ends, which accelerates the gas ejection velocity. The cone has a contraction angle ranging from 5° to 30°. The diameter of the upper opening of the cone is slightly larger than the diameter of the inner cavity of the annular combustion chamber. The upper opening of the cone is connected to the inner cavity of the annular combustion chamber using an interference fit, effectively ensuring that the secondary oxygen and gas mixing cone 38 fits well with the lower end of the annular combustion chamber 31 without leaving any gaps. The tail nozzle assembly 4 is fixed to the lower cover plate 12 and includes a convergent nozzle 41 with a bend angle ranging from 45° to 90° and a straight nozzle 42. The straight nozzle 42 can be lengthened or shortened according to the actual installation situation, effectively converting the vertical downward high-speed airflow into a horizontal high-speed airflow, effectively solving the engine ignition problem.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0027] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An underwater oxygen-kerosene jet engine, comprising an outer shell component (1), a supply component (2), a combustion chamber component (3) and a tail nozzle component (4); characterized in that: The supply component (2) includes a kerosene supply pipe (21), an ignition kerosene supply pipe (22) and an oxygen supply pipe (23); the combustion chamber component (3) includes an annular combustion chamber (31), a kerosene injection ring, a high-energy kerosene igniter (37) and an oxygen-fuel secondary mixing cone (38); The outer shell component (1) comprises an outer shell body (13), an upper cover plate (11), and a lower cover plate (12), wherein the upper cover plate (11) and the lower cover plate (12) are respectively provided at two ends of the outer shell body (13); The annular combustion chamber (31) is provided in the outer shell component (1), a hole is provided on the surface of the outer shell body (13), the high-energy kerosene igniter (37) passes through the hole and is fixed to the outer wall of the annular combustion chamber (31), and the high-energy kerosene igniter (37) is provided with the ignition kerosene supply pipe (22); One end of the oxygen supply pipe (23) is connected to an oxygen injector (24), and the outlet of the oxygen injector (24) is provided with 3 to 8 injection holes in the radial direction. The oxygen injector (24) passes through a preset hole on the upper cover plate (11) from the inside of the engine and is fixed to a locking nut (25); The kerosene injection ring comprises a kerosene inlet pipe (34), an injection ring body (35) and a kerosene injection needle (36); the kerosene supply pipe (21) is arranged on the upper cover plate (11); the kerosene inlet pipe (34) is connected to the kerosene supply pipe (21) via a thread; the kerosene injection needle (36) is inserted into an evaporation pipe (32) evenly distributed in the annular combustion chamber (31); the number of the evaporation pipe (32) in the annular combustion chamber (31) is equal to the number of the kerosene injection needles (36); and the kerosene injection needles (36) are evenly distributed on the injection ring body (35); The oxygen-fuel-gas secondary mixing cone (38) is disposed on the lower end surface of the annular combustion chamber (31); the oxygen-fuel-gas secondary mixing cone (38) is in a conical shape with openings at both ends; the upper opening of the oxygen-fuel-gas secondary mixing cone (38) is connected to the inner cavity of the annular combustion chamber (31) by means of interference fit; The tail nozzle component (4) is fixed on the lower cover plate (12).

2. The underwater oxygen-kerosene jet engine according to claim 1, characterized in that: The upper cover plate (11) is connected to the upper end flange of the shell body (13) by means of screws, and the lower cover plate (12) is connected to the lower end flange of the shell body (13) by means of screws.

3. The underwater oxygen-kerosene jet engine according to claim 1, characterized in that: The diameter of the injection hole is 1mm to 3mm.

4. The underwater oxygen-kerosene jet engine according to claim 1, characterized in that: The oxygen-fuel gas secondary mixing cone is provided with a contraction angle in the range of 5° to 30°.

5. The underwater oxygen-kerosene jet engine according to claim 1, characterized in that: The tail nozzle component (4) comprises a convergent nozzle (41) with a bending angle in the range of 45° to 90° and a straight section nozzle (42).

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