Normal-pressure oxygenating device and method for microminiature aero-engine

Abstract

The invention belongs to the technical field of engines, and particularly relates to a normal-pressure oxygen supplementation device and method for a microminiature aero-engine. The normal-pressure oxygen supplementing device comprises an oxygen generator, a combustion chamber, an igniter, a flow guide assembly and an evaporation assembly, a shell of the flow guide assembly communicates with the oxygen generator, and a plurality of first flow guide holes and a plurality of second flow guide holes are formed in the first end face of the shell at intervals; the valve plate is rotationally connected into the shell, and the valve plate is switched between a first state and a second state; the evaporation assemblies are arranged in the combustion chamber and correspond to the second flow guide holes in a one-to-one mode, each evaporation assembly comprises an evaporation pipe, the evaporation pipes communicate with the corresponding second flow guide holes, one ends of the evaporation pipes communicate with the oil supply end of the engine, and the other ends of the evaporation pipes are open. Fuel oil can be evenly mixed with supplemented oxygen after being sprayed out, so that the fuel oil is fully and completely combusted, the work efficiency of an engine is improved, and the service life of the engine is prolonged.

Description

Technical Field

[0001] This application belongs to the field of engine technology, specifically relating to an atmospheric pressure oxygen supplementation device and method for micro-sized aero-engines. Background Technology

[0002] The atmospheric pressure oxygen supply device for micro-engines delivers oxygen at atmospheric pressure to the interior of the micro-engine, providing sufficient oxygen for fuel combustion, ensuring complete combustion of the fuel, providing stable power output, and enabling the micro-engine to maintain normal operation during operation.

[0003] In the process of developing this application, the applicant discovered at least the following shortcomings in the relevant technology: During the process of adding oxygen to the engine through an atmospheric pressure oxygen supplementation device, the fuel cannot be evenly mixed with the supplemented oxygen after it is injected, resulting in some fuel not being completely burned. This affects the engine's working efficiency and its service life. Summary of the Invention

[0004] Based on the above-mentioned technical problems, this application provides an atmospheric pressure oxygen supplementation device and method for micro-sized aero-engines, which can improve to a certain extent the technical problem that the fuel cannot be uniformly mixed with the supplemented oxygen after being injected, resulting in some fuel not being completely burned, affecting the engine's working efficiency and service life.

[0005] This application is achieved through the following technical solution: In a first aspect, this application provides an atmospheric pressure oxygen supply device for a micro-sized aero-engine. The atmospheric pressure oxygen supply device includes: a protective cover; an oxygen generator built into the protective cover; a combustion chamber built into the protective cover; an igniter connected to the combustion chamber; and a flow guiding assembly built into the protective cover. The flow guiding assembly includes a housing, a distribution plate, a mixing cover, and a fuel injector. The housing is connected to the oxygen generator and has a first end face facing the combustion chamber. The first end face has a plurality of first flow guiding holes and a plurality of second flow guiding holes spaced apart. The plurality of first flow guiding holes are spaced apart around the central axis of the housing, and the plurality of second flow guiding holes are spaced apart around the central axis of the housing. The distribution plate is rotatably connected to the housing and switches between a first state and a second state. When the distribution plate is in the first state, the distribution plate simultaneously opens the plurality of first flow guiding holes and a plurality of second flow guiding holes. The first guide hole is closed, and multiple second guide holes are closed; when the distribution plate is in the second state, the distribution plate simultaneously closes multiple first guide holes and opens multiple second guide holes; the mixing shroud and the first guide hole are arranged in a one-to-one correspondence, the mixing shroud is connected to the side of the first end face facing the combustion chamber, one end of the guide shroud is connected to the corresponding first guide hole, and the other end of the mixing shroud extends into the combustion chamber; the fuel injector and the mixing shroud are arranged in a one-to-one correspondence, the fuel injector is built into the corresponding mixing shroud, the fuel injector is connected to the first end face and is connected to the fuel supply end of the engine; the evaporation assembly is built into the combustion chamber and is arranged in a one-to-one correspondence with the second guide holes, each evaporation assembly includes: an evaporation tube, which is connected to the corresponding second guide hole, one end of the evaporation tube is connected to the fuel supply end of the engine, and the other end of the evaporation tube is open.

[0006] In some implementations, the distribution plate is provided with notches that correspond one-to-one with the guide holes. When the distribution plate is in a first state, the distribution plate covers multiple second guide holes, and multiple first guide holes are visible through the notches. When the distribution plate is in a second state, the distribution plate covers multiple first guide holes, and multiple second guide holes are visible through the notches.

[0007] In some implementations, the first guide hole and the second guide hole are spaced apart.

[0008] In some embodiments, the mixing cowl includes: an outer cowl and an inner cowl, one end of which and the first end face of which are spaced apart from each other towards the combustion chamber; the inner cowl is disposed within the outer cowl; the first guide hole, projected axially along the cowl, falls between one end of the inner cowl and one end of the outer cowl; a plurality of spirally arranged first guide grooves are formed on the circumferential surface of the inner cowl; a cover is disposed over the other end of the outer cowl and the inner cowl; the cover has an output hole, projected axially along the cowl, which falls within the inner cowl; one end of the injector seals one end of the inner cowl; the circumferential surface of the injector is spaced apart from the inner cowl; the other end of the injector faces the cover; and the other end of the injector has an injection hole.

[0009] In some embodiments, the housing is annular; the atmospheric pressure oxygen supply device further includes a first oil distribution ring and a second oil pipe, the first oil distribution ring being connected to the fuel supply end of the engine, the first oil distribution ring being built into the inner hole of the housing, the second oil pipe being provided in a one-to-one correspondence with the injector, one end of the second oil pipe being connected to the first oil distribution ring, and the other end of the second oil pipe passing through the housing and being connected to the corresponding injector.

[0010] In some embodiments, the housing further has a second end face, which is disposed opposite to the first end face along the axial direction of the housing; the atmospheric pressure oxygen supply device further includes a plurality of pressure relief valves, which are connected to the second end face and communicate with the interior of the housing.

[0011] In some embodiments, the pressure relief valve has a pressure relief portion protruding from the second end face, and the pressure relief portion has a plurality of pressure relief holes on its peripheral surface; the atmospheric pressure oxygen supply device further includes a flow guide fan, which is rotatably connected to the peripheral surface of the pressure relief portion.

[0012] In some embodiments, each evaporation assembly has two evaporation tubes arranged side by side, and the circumferential surface of each evaporation tube is provided with a second guide groove; the evaporation assembly also includes an isolation cover and guide vanes, the isolation cover and the evaporation tube are arranged in a one-to-one correspondence, the isolation cover is fitted onto the circumferential surface of the corresponding evaporation tube, the second guide groove is located inside the isolation cover, and the isolation cover is connected to the corresponding second guide hole; the guide vanes and the evaporation tubes are arranged in a one-to-one correspondence, the guide vanes are arranged in a spiral shape inside the corresponding evaporation tube, and the guide vanes extend from the second guide groove to the other end of the evaporation tube.

[0013] In some embodiments, the evaporation assembly further includes a connecting pipe, the middle of which is connected to the engine fuel supply end, and the two ends of which are respectively connected to the two isolation covers.

[0014] In a second aspect, this application also provides a method for atmospheric pressure oxygen replenishment for a micro-sized aircraft engine, the method being based on the atmospheric pressure oxygen replenishment device described in the first aspect, the method comprising: When the engine starts, the distribution plate is controlled to be in the first state. The oxygen generated by the oxygen generator is delivered to the housing and then delivered to the mixing chamber through the opened first guide hole. The fuel from the fuel supply end of the engine is delivered to the mixing chamber through the fuel injector. The fuel and the oxygen are mixed in the mixing chamber and then delivered to the combustion chamber. The mixture is ignited by the igniter, and the engine starts. When the engine is started, the distribution plate is controlled to be in the second state. The oxygen generated by the oxygen generator is delivered to the evaporator tube of the evaporator assembly through the opened second guide hole. The fuel from the fuel supply end of the engine is delivered to the evaporator tube of the evaporator assembly through the fuel injector and vaporized. The vaporized fuel and oxygen are mixed and output from the open end of the evaporator tube to the combustion chamber to improve fuel efficiency.

[0015] The atmospheric pressure oxygen supply device and oxygen supply method for micro-sized aircraft engines provided in this application can make the fuel mixed evenly with the supplemented oxygen after it is injected, so as to make the fuel burn completely and fully, thereby improving the engine's working efficiency and service life, and has great practicality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0017] Figure 1 This application provides a schematic diagram of the structure of a micro-sized aero-engine atmospheric pressure oxygen supplementation device 10. Figure 2 It shows Figure 1 Internal diagram; Figure 3 It shows Figure 1 A schematic diagram showing the structure after removing the protective cover 100 and the combustion chamber 300; Figure 4 A schematic diagram showing the connection between the flow guiding assembly 500 and the oxygen generator 200 is shown. Figure 5 A schematic diagram of the flow guiding assembly 500 removing the mixing shroud 530 is shown; Figure 6 It shows Figure 5 A partial sectional view; Figure 7 A schematic diagram is shown showing the distribution panel 520 switching from a first state to a second state; Figure 8 A schematic diagram of the structure of the mixing shroud 530 is shown; Figure 9 A schematic diagram showing the state of the injector 540 penetrating the combustion chamber 300 is shown; Figure 10 An assembly diagram of the mixing cowl 530 and the injector 540 is shown; Figure 11 A schematic diagram of the pressure relief valve 900 is shown. Figure 12 A schematic diagram of the assembly of the second oil distribution ring 840 and the evaporation assembly 600 is shown. Figure 13 A schematic diagram of the evaporation assembly 600 is shown. Figure 14 It shows Figure 13 A cross-sectional schematic diagram.

[0018] Explanation of reference numerals in the attached figures: 10. Atmospheric pressure oxygen supplementation device; 100. Protective shield; 200. Oxygen generator; 210. Oxygen supplement tubing; 300, Combustion chamber; 310, Communicating area; 320, Communicating hole; 330, Gas outlet; 400. Ignition device; 500, Flow guiding assembly; 510, Housing; 511, First end face; 512, First flow guiding hole; 513, Second flow guiding hole; 514, Flow guiding channel; 515, Second end face; 520, Distribution plate; 521, Notch; 530, Mixing cover; 531, Outer cover; 532, Inner cover; 533, Cover; 534, First flow guiding groove; 535, Output hole; 540, Injector; 541, Injection hole; 600, Evaporation assembly; 610, Evaporation tube; 620, Second guide channel; 630, Deflector shroud; 640, Guide vanes; 650, Connecting pipe; 660, Gas delivery pipe; 700, support ring; 810, First oil distribution ring; 820, Second oil pipe; 830, First oil pipe; 840, Second oil distribution ring; 850, Third oil pipe; 900, pressure relief valve; 910, pressure relief hole; 920, deflector fan. Detailed Implementation

[0019] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0020] In the process of supplementing oxygen to the internal structure of micro-engines using atmospheric pressure oxygen supplementation devices, the injected fuel cannot mix evenly with the supplemented oxygen, resulting in incomplete combustion of some fuel. This affects both the engine's power efficiency and its service life. Therefore, this application provides an atmospheric pressure oxygen supplementation device and method for micro-engines to improve, to a certain extent, the technical problem of incomplete combustion of fuel due to the inability to mix evenly with supplemented oxygen after fuel injection, thus affecting both engine power efficiency and service life.

[0021] Figure 1 This application provides a schematic diagram of the structure of a atmospheric pressure oxygen supply device 10 for a miniature aircraft engine. Figure 2 It shows Figure 1 Internal diagram, combined with Figure 1 as well as Figure 2 The atmospheric pressure oxygen supply device 10 includes a protective cover 100, an oxygen generator 200, a combustion chamber 300, and an igniter 400. The oxygen generator 200, the combustion chamber 300, and the igniter 400 are all housed inside the protective cover 100. The igniter 400 is connected to the combustion chamber 300 so that the internal components of the atmospheric pressure oxygen supply device 10 are protected by the protective cover 100.

[0022] Figure 3 It shows Figure 1 A structural diagram showing the removal of the protective cover 100 and the combustion chamber 300, combined with... Figure 2 as well as Figure 3 The atmospheric pressure oxygen supplementation device 10 also includes a flow guiding component 500, which is built into the protective cover 100. Figure 4 A schematic diagram showing the connection between the flow guiding assembly 500 and the oxygen generator 200 is shown. Figure 5 A schematic diagram of the flow guiding assembly 500 removing the mixing shroud 530 is shown. Figure 6 It shows Figure 5 A partial sectional view, combined with Figures 4-6The flow guiding assembly 500 includes a housing 510, a flow distribution plate 520, a mixing shroud 530, and an injector 540. The housing 510 is connected to the oxygen generator 200. The housing 510 has a first end face 511 facing the combustion chamber 300. The first end face 511 is provided with a plurality of first flow guiding holes 512 and a plurality of second flow guiding holes 513 spaced apart. The plurality of first flow guiding holes 512 are spaced apart around the central axis of the housing 510, and the plurality of second flow guiding holes 513 are spaced apart around the central axis of the housing 510. The flow distribution plate 520 is rotatably connected to the housing 510 and switches between a first state and a second state.

[0023] Figure 7 A schematic diagram is shown showing the distribution panel 520 switching from a first state to a second state, combined with... Figure 7 When the distributor plate 520 is in the first state, the distributor plate 520 simultaneously opens multiple first guide holes 512 and closes multiple second guide holes 513; when the distributor plate 520 is in the second state, the distributor plate 520 simultaneously closes multiple first guide holes 512 and opens multiple second guide holes 513; the mixing shroud 530 and the first guide holes 512 are arranged in a one-to-one correspondence, the mixing shroud 530 is connected to the side of the first end face 511 facing the combustion chamber 300, one end of the guide shroud is connected to the corresponding first guide hole 512, and the other end of the mixing shroud 530 extends into the combustion chamber 300; the fuel injector 540 and the mixing shroud 530 are arranged in a one-to-one correspondence, the fuel injector 540 is built into the corresponding mixing shroud 530, multiple fuel injectors 540 are connected to the first end face 511 and are connected to the fuel supply end of the engine.

[0024] Combination Figure 3 The atmospheric pressure oxygen supply device 10 also includes an evaporation assembly 600, which is built into the combustion chamber 300 and is configured one-to-one with the second guide hole 513. Each evaporation assembly 600 includes an evaporation pipe 610, which is connected to the corresponding second guide hole 513. One end of the evaporation pipe 610 is connected to the engine fuel supply end, and the other end of the evaporation pipe 610 is open.

[0025] When the engine starts, the control distributor 520 is in its first state. Oxygen generated by the oxygen generator 200 is delivered to the housing 510 and then through the opened first guide hole 512 to the mixing chamber 530. Fuel from the engine's fuel supply end is delivered to the mixing chamber 530 via the injector 540. The fuel and oxygen mix in the mixing chamber 530 and are then delivered to the combustion chamber 300, where they are ignited by the igniter 400, thus starting the engine. During this process, oxygen and fuel mix in the mixing chamber 530 to form a fuel mist. This fuel mist is evenly injected into the combustion chamber 300, enabling the igniter 400 to ignite quickly and start the engine. After the engine starts, the combustion chamber 300 heats up. At this time, the control distribution plate 520 is in the second state. Oxygen generated by the oxygen generator 200 is delivered to the evaporator tube 610 of the evaporator assembly 600 through the opened second guide hole 513. Fuel from the engine's fuel supply end is delivered to the evaporator tube 610 of the evaporator assembly 600 through the injector 540 and vaporized. The vaporized fuel mixes with oxygen and is output from the open end of the evaporator tube 610 to the combustion chamber 300. Therefore, after the engine starts, the combustion chamber 300 contains a mixture of vaporized fuel and oxygen. Compared to the oil mist formed by liquefied fuel and oxygen, the mixture of vaporized fuel and oxygen is more thorough and uniform, and has higher stability, thereby improving fuel combustion efficiency, improving engine power efficiency, and ensuring engine lifespan. The specific details of the atmospheric pressure oxygen supply device 10 are further described below with reference to the attached drawings.

[0026] In some embodiments, the protective cover 100 is generally cylindrical and is assembled from two separate structures to facilitate the assembly of internal components. The combustion chamber 300 is also generally cylindrical and is arranged coaxially with the protective cover 100. The peripheral wall of the combustion chamber 300 can be fixedly connected to the peripheral wall of the protective cover 100 by bolts or other components so that the combustion chamber 300 is fixedly disposed inside the protective cover 100.

[0027] Combination Figure 2 as well as Figure 3 In some embodiments, the atmospheric pressure oxygen supply device 10 further includes a support ring 700, which is coaxially disposed at one axial end inside the protective cover 100. The support ring 700 and the combustion chamber 300 are arranged opposite to each other. An oxygen generator 200 is disposed through the support ring 700 to fix the oxygen generator 200 inside the protective cover 100. The output port of the oxygen generator 200 is connected to the inside of the housing 510 through an oxygen supply pipe 210. Oxygen is generated inside the oxygen generator 200 by a chlorate oxygen candle, and the generated oxygen is supplied to the housing 510 through the oxygen supply pipe 210.

[0028] Combination Figures 2-4In some embodiments, the housing 510 is arranged in a ring shape and is disposed between the support ring 700 and the combustion chamber 300. It has a first end face 511 facing the combustion chamber 300 and a second end face 515 facing away from the combustion chamber 300. The second end face 515 and the first end face 511 are disposed opposite to each other. The oxygen supply pipe 210 passes through the second end face 515 to communicate with the interior of the housing 510.

[0029] In some embodiments, each of the first guide holes 512 is arranged at equal angles around the central axis of the housing 510, and each of the second guide holes 513 is also arranged at equal angles around the central axis of the housing 510. The central axes of each of the first guide holes 512 and the central axes of each of the second guide holes 513 are located on the same circle, and a second guide hole 513 is arranged between two adjacent first guide holes 512, that is, the first guide holes 512 and the second guide holes 513 are spaced apart. Of course, in other embodiments, more second guide holes 513 may be arranged between two adjacent first guide holes 512, such as two, three, etc., and this application does not limit this.

[0030] Combination Figure 6 as well as Figure 7 In some embodiments, the distribution plate 520 is adapted to be disposed within the housing 510. The distribution plate 520 is provided with notches 521 corresponding to the guide holes one by one. When the distribution plate 520 is in the first state, the distribution plate 520 covers multiple second guide holes 513, and multiple first guide holes 512 are exposed through the notches 521. When the distribution plate 520 is in the second state, the distribution plate 520 covers multiple first guide holes 512, and multiple second guide holes 513 are exposed through the notches 521. That is, by controlling the rotation of the distribution plate 520 within the housing 510, the distribution plate 520 can be switched between the first state and the second state.

[0031] In some embodiments, the distribution plate 520 has a toothed groove on its circumferential surface, and a motor is disposed within the housing 510. The output shaft of the motor is provided with a drive wheel, which meshes with the toothed groove. By controlling the motor to rotate at a set angle, the distribution plate 520 can be driven to rotate within the housing 510, switching between a first state and a second state. In other embodiments, the distribution plate 520 can also be driven by electromagnetic or magnetic force, and this application does not impose any limitations on this.

[0032] Combination Figures 4-6In some embodiments, the housing 510 is annular, and the atmospheric pressure oxygen supply device 10 also includes a first oil distribution ring 810 and a second oil pipe 820. The first oil distribution ring 810 is connected to the fuel supply end of the engine through a first oil pipe 830. The first oil distribution ring 810 is built into the inner hole of the housing 510. The second oil pipe 820 and the injector 540 are arranged one-to-one. One end of the second oil pipe 820 is connected to the first oil distribution ring 810, and the other end of the second oil pipe 820 passes through the housing 510 and is connected to the corresponding injector 540, so that the fuel supply end of the engine is connected to the multiple injectors 540 through the transfer of the first oil distribution ring 810 and multiple second oil pipes 820.

[0033] Combination Figures 4-6 In some embodiments, a plurality of flow channels 514 are provided on the inner side of the first end face 511. The flow channels 514, the second oil pipe 820 and the first flow hole 512 are arranged in a one-to-one correspondence. One end of the flow channel 514 is connected to the corresponding second oil pipe 820, and the other end of the flow channel 514 is connected to the side wall of the corresponding first flow hole 512. Since the injector 540 is located in the corresponding first flow hole 512, the fuel is transported to the first flow hole 512 through the first fuel distribution ring 810, the second oil pipe 820 and the flow channel 514, and injected into the injector 540, and then sprayed into the mixing cover 530 by the injector 540.

[0034] Figure 8 A schematic diagram of the mixing shroud 530 is shown. Figure 9 A schematic diagram showing the state of the injector 540 penetrating the combustion chamber 300 is shown. Figure 10 An assembly diagram of the mixing cowl 530 and the injector 540 is shown, combined with... Figures 8-10 In some embodiments, the mixing shroud 530 includes an outer shroud 531, an inner shroud 532, and a cover 533. One end of the outer shroud 531 and the inner shroud 532 are spaced apart from the side of the first end face 511 facing the combustion chamber 300. The inner shroud 532 is gapped inside the outer shroud 531. The first guide hole 512 is projected along the axial direction of the guide shroud between one end of the inner shroud 532 and one end of the outer shroud 531. The circumferential surface of the inner shroud 532 has a plurality of first guide holes arranged in a spiral pattern. A guide channel 534; a cover 533 is provided on the other end of the outer cover 531 and the inner cover 532, and an output hole 535 is provided on the cover 533. The output hole 535 is projected into the inner cover 532 along the axial direction of the guide shroud; one end of the injector 540 seals one end of the inner cover 532, and the circumferential surface of the injector 540 and the inner cover 532 are spaced apart. The other end of the injector 540 faces the cover 533, and an injection hole 541 is provided on the other end of the injector 540.

[0035] When the engine starts, the engine fuel supply end delivers fuel to the first fuel distribution ring 810 through the first fuel pipe 830. The first fuel distribution ring 810 distributes the fuel, allowing it to enter the injector 540 through the second fuel pipe 820 and the guide channel 514. The fuel is then sprayed into the mixing cowl 530 through the injection holes 541 of the injector 540. Simultaneously, the oxygen generator starts, producing oxygen, which is then delivered to the housing 510 through the oxygen supply pipe 210. This controls the distributor plate 520 to rotate to the first state, opening each of the first guide channels. The first guide hole 512 blocks each of the second guide holes 513, allowing oxygen to enter between the outer cover 531 and the inner cover of the mixing cowl 530 through the first guide hole 512. Oxygen then enters the area between the injector 540 and the cover 533 through the first guide groove 534 on the inner cover 532. After mixing in this area, the fuel and oxygen are output from the output hole 535 of the cover 533 into the combustion chamber 300, igniting the igniter 400 and ensuring complete combustion of the fuel-air mixture within the combustion chamber 300. Because the first guide groove 534 is spirally arranged, the oxygen and fuel mixture becomes more uniform, allowing for more complete combustion and improving the starting stability of the engine under special conditions.

[0036] Combination Figure 9 In some embodiments, the first end face 511 of the housing 510 is closely attached to one axial end of the combustion chamber 300. One axial end of the combustion chamber 300 is provided with a connecting area 310 corresponding to the mixing shroud 530. The connecting area 310 is provided with a connecting hole 320 and a plurality of air outlets 330. The connecting hole 320 is for the fuel injector 540 to pass through. The plurality of air outlets 330 are circumferentially spaced around the connecting hole 320. One end of the outer cover 531 and the inner cover 532 of the mixing shroud 530 abuts against the connecting area 310, and the plurality of air outlets 330 are located between the outer cover 531 and the inner cover, and are correspondingly connected to the first guide hole 512.

[0037] Combination Figures 4-6In some embodiments, the atmospheric pressure oxygen supply device 10 further includes multiple pressure relief valves 900, which are connected to the second end face 515 and communicate with the interior of the housing 510. This arrangement is because: when the engine starts, the atmospheric pressure oxygen supply device 10 may use an oxygen generator to supply oxygen, potentially leading to excessive oxygen supply pressure and affecting fuel combustion. Therefore, by setting up pressure relief valves 900, pressure is released during engine start-up oxygen supply, discharging the released oxygen outside the combustion chamber 300 to prevent excessive oxygen supply from affecting the fuel combustion state during engine start-up. The compressed air generated after engine start-up mixes with the released oxygen, increasing the oxygen content in the compressed air, allowing for more complete combustion of the compressed air and fuel upon entering the combustion chamber 300, thus improving fuel efficiency. The pressure relief valves 900 and the corresponding first guide holes 512 are arranged in a one-to-one correspondence, with the pressure relief valves 900 and their corresponding first guide holes 512 positioned opposite each other.

[0038] Figure 11 A schematic diagram of the pressure relief valve 900 is shown, combined with... Figure 11 In some embodiments, the pressure relief valve 900 has a pressure relief portion protruding from the second end face 515, and the atmospheric pressure oxygen supply device 10 also includes a guide fan 920, which is rotatably connected to the circumferential surface of the pressure relief portion via a bearing. With this configuration, the multiple pressure relief holes 910 on the pressure relief portion are used to relieve pressure on the oxygen inside the housing 510. The airflow from the pressure relief holes 910 drives the guide fan 920 to rotate, thereby guiding the oxygen flow. The rotation of the guide fan 920 also mixes the oxygen with the compressed air, increasing the oxygen content in the compressed air and further improving fuel efficiency.

[0039] Combination Figure 2 as well as Figure 3 In some embodiments, the atmospheric pressure oxygen supply device 10 further includes a second oil distribution ring 840, which is externally located in the combustion chamber 300. The second oil distribution ring 840 is located outside the other axial end of the combustion chamber 300. The second oil distribution ring 840 is connected to the fuel supply end of the engine through a third oil pipe 850, thereby enabling the fuel from the fuel supply section of the engine to be delivered to the second oil distribution ring 840.

[0040] Figure 12 A schematic diagram of the assembly of the second oil distribution ring 840 and the evaporation assembly 600 is shown. Figure 13 A schematic diagram of the evaporation assembly 600 is shown. (Combined with...) Figure 12 as well as Figure 13 In some embodiments, each evaporation assembly 600 has two evaporation tubes 610 arranged side by side, and one end of each evaporation tube 610 is connected to the second oil distribution ring 840, so that the fuel delivered to the second oil distribution ring 840 can be delivered to the two evaporation tubes 610, and the fuel is vaporized under the action of the high temperature of the combustion chamber 300.

[0041] Figure 14 It shows Figure 13 A cross-sectional schematic diagram, combined with Figure 13 as well as Figure 14 In some embodiments, a second guide groove 620 is provided on the circumferential surface of the evaporator tube 610. The evaporation assembly 600 also includes an isolation cover 630 and a guide vane 640. The isolation cover 630 and the evaporator tube 610 are respectively provided. The isolation cover 630 is sleeved on the circumferential surface of the corresponding evaporator tube 610. The second guide groove 620 is located inside the isolation cover 630. The isolation cover 630 is connected to the corresponding second guide hole 513. The guide vane 640 and the evaporator tube 610 are respectively provided. The guide vane 640 is arranged in a spiral shape inside the corresponding evaporator tube 610. The guide vane 640 extends from the second guide groove 620 to the other end of the evaporator tube 610. After the engine starts successfully, the control distribution plate 520 rotates to the second state within the housing 510, blocking each of the first guide holes 512 and opening each of the second guide holes 513, allowing oxygen to enter the isolation cover 630 through the second guide holes 513, and then enter the evaporator 610 through the second guide groove 620 on the evaporator 610, mixing with the fuel vaporized in the evaporator 610. Under the action of the guide vanes 640, the oxygen flows out from the other end of the evaporator 610 into the combustion chamber 300, where it mixes thoroughly with the compressed air inside the combustion chamber 300 to ensure fuel combustion rate.

[0042] Combination Figure 13 as well as Figure 14 In some embodiments, the evaporation assembly 600 further includes a connecting pipe 650, the middle of which is connected to a gas supply pipe 660 and a corresponding second guide hole 513, and the two ends of the connecting pipe 650 are respectively connected to two isolation covers 630, so as to supplement the oxygen delivered by the second guide hole 513 into the evaporation tube 610 through the connecting pipe 650.

[0043] Based on the aforementioned pressurized oxygen supplementation device, in a second aspect of this application, a method for atmospheric pressure oxygen supplementation for a miniature aircraft engine is also provided, the method comprising: When the engine starts, the control distribution plate 520 is in the first state. The oxygen generated by the oxygen generator 200 is delivered to the housing 510 and then delivered to the mixing chamber 530 through the opened first and second guide channels 620. The fuel from the fuel supply end of the engine is delivered to the mixing chamber 530 through the injector 540. The fuel and oxygen are mixed in the mixing chamber 530 and then delivered to the combustion chamber 300. The mixture is then ignited by the igniter 400, and the engine starts. When the engine starts, the control distribution plate 520 is in the second state. The oxygen generated by the oxygen generator 200 is delivered to the evaporation pipe 610 of the evaporation assembly 600 through the opened second guide channel 620. The fuel from the fuel supply end of the engine is delivered to the evaporation pipe 610 of the evaporation assembly 600 through the fuel injector 540 and vaporized. After the vaporized fuel mixes with the oxygen, it is output from the open end of the evaporation pipe 610 to the combustion chamber 300 to improve fuel efficiency.

[0044] In summary, the atmospheric pressure oxygen supply device 10 and oxygen supply method for micro-sized aircraft engines provided in this application can make the fuel sprayed out and the supplemented oxygen mix evenly, so as to make the fuel burn completely and improve the engine's working efficiency and service life, and have great practicality.

[0045] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0049] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A normal pressure oxygen supplement device for a micro gas turbine engine, characterized by comprising: The atmospheric pressure oxygen supplement device comprises: a protective cover; an oxygen generator arranged in the protective cover; a combustion chamber arranged in the protective cover; an igniter connected to the combustion chamber; a flow guide assembly arranged in the protective cover, the flow guide assembly comprising a shell, a flow distribution disc, a mixed flow cover, and an oil injector, wherein: the shell is in communication with the oxygen generator, the shell has a first end face, the first end face is directed towards the combustion chamber, a plurality of first flow guide holes and a plurality of second flow guide holes are arranged at intervals on the first end face, the plurality of first flow guide holes are arranged at intervals around the central axis of the shell, and the plurality of second flow guide holes are arranged at intervals around the central axis of the shell; the flow distribution disc is rotationally connected to the shell, the flow distribution disc is switchable between a first state and a second state, when the flow distribution disc is in the first state, the flow distribution disc simultaneously opens the plurality of first flow guide holes and closes the plurality of second flow guide holes, and when the flow distribution disc is in the second state, the flow distribution disc simultaneously closes the plurality of first flow guide holes and opens the plurality of second flow guide holes; the mixed flow cover and the first flow guide hole are arranged in one-to-one correspondence, the mixed flow cover is connected to the side of the first end face directed towards the combustion chamber, one end of the mixed flow cover is in communication with the corresponding first flow guide hole, and the other end of the mixed flow cover penetrates into the combustion chamber; the oil injector and the mixed flow cover are arranged in one-to-one correspondence, the oil injector is arranged in the corresponding mixed flow cover, the oil injector is connected to the first end face, and the oil injector is in communication with the oil supply end of the engine; an evaporation assembly is arranged in the combustion chamber and arranged in one-to-one correspondence with the second flow guide hole, each evaporation assembly comprises: an evaporation tube in communication with the corresponding second flow guide hole, one end of the evaporation tube is in communication with the oil supply end of the engine, and the other end of the evaporation tube is open.

2. The normal pressure oxygen supplementing device for micro gas turbine according to claim 1, characterized by the flow distribution disc is provided with a notch corresponding to the flow guide hole, when the flow distribution disc is in the first state, the flow distribution disc shields the plurality of second flow guide holes, and the plurality of first flow guide holes are exposed through the notch, and when the flow distribution disc is in the second state, the flow distribution disc shields the plurality of first flow guide holes, and the plurality of second flow guide holes are exposed through the notch.

3. The normal pressure oxygen supplementing device for micro gas turbine according to claim 1, characterized by The first flow guide hole and the second flow guide hole are arranged at intervals.

4. The normal pressure oxygen supplementing device for micro gas turbine according to claim 1, wherein The mixed flow cover comprises: an outer cover and an inner cover arranged at intervals on one side of the first end face directed towards the combustion chamber, the inner cover is arranged in the outer cover, the axial projection of the first flow guide hole falls between one end of the inner cover and one end of the outer cover, and a plurality of first flow guide grooves arranged in a spiral manner are formed on the circumferential surface of the inner cover; a cover cap arranged on the other end of the outer cover and the inner cover, the cover cap is provided with an output hole, and the axial projection of the output hole falls in the inner cover; one end of the oil injector seals one end of the inner cover, the circumferential surface of the oil injector and the inner cover are arranged at intervals, the other end of the oil injector is directed towards the cover cap, and the other end of the oil injector is provided with an oil injection hole.

5. The normal pressure oxygen supplementing device for micro gas turbine according to claim 1, wherein The shell is annular. The normal pressure oxygen supplement device further comprises a first oil distribution ring and a second oil pipe, the first oil distribution ring is communicated with the oil supply end of the engine, the first oil distribution ring is arranged in the inner hole of the shell, the second oil pipe is arranged corresponding to the oil injector, one end of the second oil pipe is communicated with the first oil distribution ring, and the other end of the second oil pipe penetrates the shell and is communicated with the corresponding oil injector.

6. The normal pressure oxygen supplementing device for micro gas turbine according to claim 1, wherein The shell further has a second end face, and the second end face and the first end face are oppositely arranged along the axial direction of the shell. The normal pressure oxygen supplement device further comprises a plurality of pressure relief valves, and the plurality of pressure relief valves are connected to the second end face and communicated with the inside of the shell.

7. The normal pressure oxygen supplementing device for micro gas turbine according to claim 6, characterized by The pressure relief valve has a pressure relief part protruding from the second end face, and a plurality of pressure relief holes are arranged on the circumferential surface of the pressure relief part. The normal pressure oxygen supplement device further comprises a flow guide fan, and the flow guide fan is rotationally connected to the circumferential surface of the pressure relief part.

8. The normal pressure oxygen supplementing device for micro gas turbine according to claim 1, wherein The evaporation pipe of each evaporation assembly is arranged in parallel in two, and the circumferential surface of the evaporation pipe is provided with a second flow guide groove. The evaporation assembly further comprises an isolation cover and a flow guide blade, the isolation cover and the evaporation pipe are arranged one by one, the isolation cover is sleeved on the circumferential surface of the corresponding evaporation pipe, the second flow guide groove is located in the isolation cover, and the isolation cover is communicated with the corresponding second flow guide hole; the flow guide blade and the evaporation pipe are arranged one by one, the flow guide blade is arranged in a spiral shape in the corresponding evaporation pipe, and the flow guide blade extends from the second flow guide groove to the other end of the evaporation pipe.

9. The normal pressure oxygen supplementing device for micro gas turbine according to claim 8, characterized by The evaporation assembly further comprises a communication pipe, the middle part of the communication pipe is communicated with the oil supply end of the engine, and the two ends of the communication pipe are respectively communicated with the two isolation covers.

10. A method for supplying oxygen at normal pressure to a microturbine engine, characterized by, The normal pressure oxygen supplement method is based on the normal pressure oxygen supplement device according to any one of claims 1-9, and the normal pressure oxygen supplement method comprises the following steps. When the engine is started, the flow distribution plate is controlled to be in the first state, the oxygen generated by the oxygen generator is transported into the shell, and then transported into the mixed flow cover through the opened first flow guide hole, the fuel at the oil supply end of the engine is transported into the mixed flow cover through the oil injector, the fuel and the oxygen are mixed in the mixed flow cover, and then transported into the combustion chamber, the fuel is ignited through the igniter, and the engine is started; After the engine is started, the flow distribution plate is controlled to be in the second state, the oxygen generated by the oxygen generator is transported into the evaporation pipe of the evaporation assembly through the opened second flow guide hole, the fuel at the oil supply end of the engine is transported into the evaporation pipe of the evaporation assembly through the oil injector and vaporized, and then the vaporized fuel is mixed with the oxygen and output from the open end of the evaporation pipe to the combustion chamber, so as to improve the fuel efficiency.

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