Engine hot end casing and fuel intelligent control system

Abstract

The invention relates to the technical field of engines, and provides an engine hot end casing and an intelligent fuel control system. The liquid fuel oil way header pipe and the casing body are integrally formed and arranged on the outer side wall of the casing body, and the gas fuel oil way header pipe and the casing body are integrally formed and arranged on the inner side wall of the casing body. According to the engine hot end casing provided by the invention, the fuel flow path is integrated on the casing body, so that the resonance problem of two assemblies is avoided, and the safety of an engine is improved. Moreover, incoming flow high-temperature air of a gas compressor can be fully utilized to heat the hot end casing and the wall surface pipe body, and internal fuel is heated, so that the temperature of the fuel in the pipe body is increased, the physical property, especially the viscosity, of the fuel is reduced, the atomization performance of the nozzle is improved, and the starting envelope of the engine is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engines, in particular to an engine hot-end casing and fuel intelligent control system. BACKGROUND

[0002] In a gas turbine engine, the combustion chamber is mainly composed of a combustion chamber hot-end casing, a diffuser, a flame tube, a fuel nozzle, a fuel manifold and other components. The combustion chamber casing, as the main load-bearing component, is mainly used for force transmission and forming an aerodynamic flow passage. The fuel manifold, as an important component of the engine fuel supply system, mainly functions to uniformly deliver fuel to the engine combustion chamber to provide power energy for the engine, and can be called the "blood vessels" of the engine. With increasing carbon emission reduction requirements, various new fuels are emerging, including various sustainable aviation fuels (SAF) and hydrogen fuels. The fuel forms mainly include liquid fuels and gaseous fuels. In existing engines, the combustion chamber hot-end casing and the fuel manifold adopt a split design method, and the fuel manifold can be divided into a hose and a hard tube structure. The outer material of the fuel hose is mainly polytetrafluoroethylene, which has the characteristics of acid and alkali resistance and resistance to various organic solvents, but the outer diameter of the hose is relatively thick, which may be excessively twisted when installed in an engine with a small diameter combustion chamber, affecting safety. The fuel hard tube is light in texture and mainly made of stainless steel or high-temperature alloy, which is easy to purchase and process, and is suitable for engines with large power.

[0003] However, the existing engine in the prior art faces the problem that the viscosity of the new fuel becomes large in a low-temperature environment, which leads to poor nozzle atomization, thereby affecting the working envelope of the new fuel engine. Moreover, there is a risk of resonance between the fuel manifold and the combustion chamber hot-end casing. When the engine vibration is large, the fuel manifold and the engine body may resonate, thereby producing vibration cracks, even breaking, causing fuel leakage and affecting the safety of the engine in use. SUMMARY

[0004] Therefore, the present application aims to solve the problem that the existing engine in the prior art faces the problem that the viscosity of the new fuel becomes large in a low-temperature environment, which leads to poor nozzle atomization, thereby affecting the working envelope of the new fuel engine. Moreover, there is a risk of resonance between the fuel manifold and the combustion chamber hot-end casing. When the engine vibration is large, the fuel manifold and the engine body may resonate, thereby producing vibration cracks, even breaking, causing fuel leakage and affecting the safety of the engine in use. Therefore, an engine hot-end casing and fuel intelligent control system are provided.

[0005] To solve the above technical problems, the technical solution of the present application is as follows:

[0006] In one aspect, the present application provides an engine hot end casing, comprising: a casing body; a liquid fuel oil passage manifold integrally formed with the casing body and arranged on an outer side wall of the casing body, one end of the liquid fuel oil passage manifold being in communication with a liquid fuel source, and the other end being in communication with a combustion chamber of an engine; and a gaseous fuel oil passage manifold integrally formed with the casing body and arranged on an inner side wall of the casing body, one end of the gaseous fuel oil passage manifold being in communication with a gaseous fuel source, and the other end being in communication with the combustion chamber of the engine.

[0007] Further, the liquid fuel oil passage manifold comprises a liquid fuel inlet nozzle, a liquid fuel inlet pipe, a first main pipe and a first wall surface branch pipe which are sequentially in communication; the liquid fuel inlet nozzle is arranged on the outer side wall of the casing body and is in communication with the liquid fuel source; the liquid fuel inlet pipe is arranged on the outer side wall of the casing body and extends along the axial direction of the casing body; the first main pipe is arranged on the outer side wall of the casing body and extends along the circumferential direction of the casing body; and the first wall surface branch pipe is arranged on the outer side wall of the casing body and extends along the axial direction of the casing body, and is in communication with the combustion chamber of the engine.

[0008] Further, the gaseous fuel oil passage manifold comprises a gaseous fuel inlet nozzle, a gaseous fuel inlet pipe, a second main pipe and a second wall surface branch pipe which are sequentially in communication; the inlet of the gaseous fuel inlet nozzle is exposed outside the casing body, the outlet of the gaseous fuel inlet nozzle is located on the inner side wall of the casing body, and the gaseous fuel inlet nozzle is in communication with the gaseous fuel source; the gaseous fuel inlet pipe is arranged on the inner side wall of the casing body and extends along the axial direction of the casing body; the second main pipe is arranged on the inner side wall of the casing body and extends along the circumferential direction of the casing body; and the second wall surface branch pipe is arranged on the inner side wall of the casing body and extends along the axial direction of the casing body, and is in communication with the combustion chamber of the engine.

[0009] Further, the liquid fuel inlet pipe, the first main pipe and the first wall surface branch pipe are formed by structures which are convex relative to the outer side wall of the casing body and hollow inside; and the gaseous fuel inlet pipe, the second main pipe and the second wall surface branch pipe are formed by structures which are convex relative to the inner side wall of the casing body and hollow inside.

[0010] Further, the engine hot end casing further comprises an anti-freezing agent external connection nozzle and an anti-freezing agent external connection pipeline; the inlet of the anti-freezing agent external connection nozzle is connected with an anti-freezing agent source, and the outlet of the anti-freezing agent external connection nozzle is connected with one end of the anti-freezing agent external connection pipeline; the liquid fuel inlet pipeline and the gas fuel inlet pipeline are both connected with the other end of the anti-freezing agent external connection pipeline; and / or, further comprising a catalyst external connection nozzle and a catalyst external connection pipeline; the inlet of the catalyst external connection nozzle is connected with a catalyst source, and the outlet of the catalyst external connection nozzle is connected with one end of the catalyst external connection pipeline; the liquid fuel inlet pipeline and the gas fuel inlet pipeline are both connected with the other end of the catalyst external connection pipeline.

[0011] Further, a plurality of the first wall surface branch pipes are arranged at intervals along the circumferential direction of the casing body; a plurality of the second wall surface branch pipes are arranged at intervals along the circumferential direction of the casing body; and the first wall surface branch pipes and the second wall surface branch pipes are arranged in a staggered manner along the circumferential direction of the casing body.

[0012] Further, the engine hot end casing further comprises a liquid fuel oil path branch pipe, a gas fuel oil path branch pipe, and a fuel nozzle; a plurality of the liquid fuel oil path branch pipes are arranged on the head ring of the casing body, and the liquid fuel oil path branch pipes are arranged in one-to-one correspondence with the first wall surface branch pipes; the outlet of the first wall surface branch pipe is connected with the inlet of the liquid fuel oil path branch pipe, and the outlet of the liquid fuel oil path branch pipe is connected with the fuel nozzle; a plurality of the gas fuel oil path branch pipes are arranged on the head ring of the casing body, and the gas fuel oil path branch pipes are arranged in one-to-one correspondence with the second wall surface branch pipes; the outlet of the second wall surface branch pipe is connected with the inlet of the gas fuel oil path branch pipe, and the outlet of the gas fuel oil path branch pipe is connected with the fuel nozzle; and the outlet of the fuel nozzle is connected with a combustion chamber of an engine.

[0013] Further, the engine hot end casing further comprises a branch pipe connection nozzle and a sleeve nut; the outlet of the first wall surface branch pipe and the inlet of the liquid fuel oil path branch pipe are connected through the branch pipe connection nozzle and the sleeve nut; and the outlet of the second wall surface branch pipe and the inlet of the gas fuel oil path branch pipe are connected through the branch pipe connection nozzle and the sleeve nut.

[0014] In another aspect, the present application further provides a fuel intelligent control system, comprising the engine hot end casing according to any one of the above.

[0015] Further, the fuel intelligent control system further comprises a liquid fuel tank, a gas fuel tank, a catalyst tank, an anti-freezing agent tank, a control center, and a first pump body, a second pump body, a third pump body, a fourth pump body, a fuel temperature controller, a first control valve, a second control valve, a third control valve, a fourth control valve, a first temperature sensor and a second temperature sensor connected with the control center; the liquid fuel tank is connected with the inlet of the liquid fuel inlet nozzle; the gas fuel tank is connected with the inlet of the gas fuel inlet nozzle; the catalyst tank is connected with the inlet of the catalyst external connection nozzle; the anti-freezing agent tank is connected with the inlet of the anti-freezing agent external connection nozzle; the first pump body and the first control valve are arranged on the pipeline between the liquid fuel tank and the liquid fuel inlet nozzle; the second pump body and the second control valve are arranged on the pipeline between the gas fuel tank and the gas fuel inlet nozzle; the third pump body and the third control valve are arranged on the pipeline between the catalyst tank and the catalyst external connection nozzle; the fourth pump body and the fourth control valve are arranged on the pipeline between the anti-freezing agent tank and the anti-freezing agent external connection nozzle; the first temperature sensor is arranged on the pipeline between the liquid fuel oil line branch pipe and the fuel nozzle; the second temperature sensor is arranged on the pipeline between the gas fuel oil line branch pipe and the fuel nozzle; the fuel temperature controller is adapted to be arranged in the liquid fuel tank and the gas fuel tank, and is used for adjusting the temperature of the fuel in the liquid fuel tank and the gas fuel tank.

[0016] The technical scheme of the present application has the following advantages:

[0017] The engine hot-end case provided by the application integrates the fuel flow path on the case body, can strengthen the strength of the hot-end case, increase the bearing capacity, can fully utilize the circulation and heat exchange of the fuel inside the case wall, reduce the case wall temperature, improve the service life of the case, and thus improve the service life of the engine. Moreover, the integrated design of integrating the fuel flow path on the case body avoids the resonance problem of two components, thus improving the safety of the engine. Moreover, since the fuel manifold assembly is reduced, the maximum outer diameter of the engine can be greatly reduced, the application scenarios of the engine are improved, and the weight of the engine is reduced, thus improving the thrust-to-weight ratio of the engine. In addition, the liquid fuel oil path manifold and the gas fuel oil path manifold of the engine hot-end case provided by the application adopt a two-way inside-outside structure scheme, that is, one oil path is designed on the inside and outside of the hot-end case, which can further reduce the height of the case, and gaseous fuel can be used on the inside, which is more suitable for the use of different fuels, and the gaseous fuel is not affected by high temperature and can work normally inside the hot-end case. Moreover, for new fuels with increased viscosity at low temperature, when the engine works in a low-temperature environment, the high-temperature air of the compressor can be fully utilized to heat the hot-end case and the wall pipe body, so as to heat the fuel inside the pipe body, thus increasing the temperature of the fuel inside the pipe body, reducing the viscosity of the fuel, and improving the nozzle atomization performance and the engine starting envelope. Moreover, the problem of pipe body icing can be avoided, the flow and oil supply capacity of the manifold is effectively guaranteed, the engine starting envelope is widened, the application scenarios of the aircraft are increased, and the flight safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 It is a schematic view of the engine hot-end case in the embodiment of the application.

[0020] Figure 2 It is a front view of the engine hot-end case in the embodiment of the application.

[0021] Figure 3 It is a sectional view along the direction A-A in the embodiment of the application. Figure 2

[0022] Figure 4 It is a sectional view along the direction B-B in the embodiment of the application. Figure 2

[0023] Figure 5 Figure 2 ​​​A sectional view along the direction of C-C;

[0024] Figure 6 A sectional view along the direction of D-D; Figure 3 A sectional view along the direction of D-D;

[0025] Figure 7 A schematic diagram of the fuel intelligent control system in the embodiment of the present application.

[0026] Explanation of reference signs:

[0027] 1. Casing body

[0028] 2. Liquid fuel oil circuit manifold; 201, liquid fuel inlet nozzle; 202, liquid fuel inlet pipe; 203, first main pipe; 204, first wall surface branch pipe

[0029] 3. Gas fuel oil circuit manifold; 301, gas fuel inlet nozzle; 302, gas fuel inlet pipe; 303, second main pipe; 304, second wall surface branch pipe

[0030] 4. Flame tube; 5, fuel nozzle; 6, swirler; 7, diffuser; 8, outer sleeve nut; 9, liquid fuel oil circuit branch pipe; 10, gas fuel oil circuit branch pipe; 11, inlet nozzle fixing seat; 12, branch pipe connector; 13, antifreeze external connector; 14, antifreeze external connecting pipeline; 15, catalyst external connector; 16, catalyst external connecting pipeline; 17, liquid fuel tank; 18, gas fuel tank; 19, catalyst tank; 20, antifreeze tank; 21, first pump body; 22, second pump body; 23, third pump body; 24, fourth pump body; 25, fuel temperature controller; 26, control center; 27, first control valve; 28, second control valve; 29, third control valve; 30, fourth control valve; 31, first temperature sensor; 32, second temperature sensor DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0032] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as there is no conflict.

[0035] As Figure 1 , Figure 2 , Figure 3 The embodiment provides an engine hot end casing, which comprises a casing body 1, a liquid fuel oil line manifold 2 which is integrally formed with the casing body 1 and arranged on the outer side wall of the casing body 1, one end of the liquid fuel oil line manifold 2 being communicated with a liquid fuel source and the other end being communicated with a combustion chamber of an engine, and a gaseous fuel oil line manifold 3 which is integrally formed with the casing body 1 and arranged on the inner side wall of the casing body 1, one end of the gaseous fuel oil line manifold 3 being communicated with a gaseous fuel source and the other end being communicated with the combustion chamber of the engine.

[0036] The engine hot end casing provided by the embodiment integrates the fuel flow path on the casing body 1, can strengthen the strength of the hot end casing, increase the bearing capacity, can fully utilize the circulation and heat exchange of fuel inside the casing wall, reduce the casing wall temperature, improve the service life of the casing, and thus improve the service life of the engine. Moreover, the integrated design of integrating the fuel flow path on the casing body 1 avoids the resonance problem of two components, thereby improving the safety of the engine. Moreover, since the fuel manifold assembly is reduced, the maximum outer diameter of the engine can be greatly reduced, the application scenarios of the engine are improved, and the weight of the engine can be reduced, thereby improving the thrust-to-weight ratio of the engine. In addition, the liquid fuel oil path manifold 2 and the gas fuel oil path manifold 3 of the engine hot end casing provided by the embodiment adopt a two-way inside-outside structure scheme, that is, one oil path is designed on the inside and outside of the hot end casing, the height of the casing can be further reduced, and gaseous fuel can be used on the inside, which is more suitable for the use of different fuels, and the gaseous fuel is not affected by high temperature and can work normally inside the hot end casing. Moreover, for new fuels with increased viscosity at low temperature, when the engine works in a low-temperature environment, the high-temperature air of the compressor can be fully utilized to heat the hot end casing and the wall pipe body, so as to heat the internal fuel, thereby increasing the fuel temperature in the pipe body, reducing the fuel property, especially the viscosity, and improving the nozzle atomization performance, thereby improving the engine starting envelope. Moreover, the pipe body icing problem can also be avoided, the flow and oil supply capacity of the manifold are effectively guaranteed, thereby widening the engine ignition starting envelope, increasing the application scenarios of the aircraft, and improving the flight safety.

[0037] As Figure 4As shown in the figure, the liquid fuel oil circuit main pipe 2 comprises a liquid fuel inlet nozzle 201, a liquid fuel inlet pipe 202, a first main pipe 203 and a first wall surface branch pipe 204 connected in sequence. For example, the liquid fuel inlet nozzle 201 can be installed on the outer side wall of the casing body 1 through the inlet nozzle fixing seat 11, and the liquid fuel inlet nozzle 201 is connected with a liquid fuel source. The liquid fuel inlet pipe 202 is arranged on the outer side wall of the casing body 1 and extends along the axial direction of the casing body 1. The first main pipe 203 is arranged on the outer side wall of the casing body 1 and extends along the circumferential direction of the casing body 1, for example, the first main pipe 203 can extend around the casing body 1. The first wall surface branch pipe 204 is arranged on the outer side wall of the casing body 1 and extends along the axial direction of the casing body 1, and the first wall surface branch pipe 204 is connected with a combustion chamber of the engine. For example, a plurality of first wall surface branch pipes 204 can be arranged at intervals along the circumferential direction of the casing body 1, and each first wall surface branch pipe 204 is connected with the first main pipe 203. For example, the engine hot end casing further comprises a liquid fuel oil circuit branch pipe 9 and a fuel nozzle 5. A plurality of liquid fuel oil circuit branch pipes 9 are arranged on the head ring of the casing body 1, and the liquid fuel oil circuit branch pipes 9 are arranged one by one corresponding to the first wall surface branch pipes 204. The outlet of the first wall surface branch pipe 204 is connected with the inlet of the liquid fuel oil circuit branch pipe 9, and the outlet of the liquid fuel oil circuit branch pipe 9 is connected with the fuel nozzle 5. For example, the engine hot end casing further comprises a branch pipe connector 12 and a sleeve nut 8. The outlet of the first wall surface branch pipe 204 and the inlet of the liquid fuel oil circuit branch pipe 9 can be connected through the branch pipe connector 12 and the sleeve nut 8.

[0038] The liquid fuel inlet pipe 202, the first main pipe 203 and the first wall surface branch pipe 204 are formed by a structure protruding outward and hollow inside relative to the outer side wall of the casing body 1, and the hollow part is used as a channel for liquid flow. For example, the channel cross section of the structure protruding outward and hollow inside on the outer side wall can be circular.

[0039] As Figure 5As shown, the gas fuel oil main pipe 3 includes a gas fuel inlet 301, a gas fuel inlet pipe 302, a second main pipe 303, and a second wall branch pipe 304 connected in sequence. For example, the gas fuel inlet 301 can be mounted on the casing body 1 through the inlet fixing seat 11. The inlet of the gas fuel inlet 301 is exposed outside the casing body 1, and the outlet of the gas fuel inlet 301 is located on the inner wall of the casing body 1 and is connected to the gas fuel inlet pipe 302. The gas fuel inlet 301 is connected to a gas fuel source; the gas fuel inlet pipe 302 extends along the axial direction of the casing body 1 and is disposed on the inner wall of the casing body 1; the second main pipe 303 is wound around the inner wall of the casing body 1 in the circumferential direction; the second wall branch pipe 304 extends along the axial direction of the casing body 1 and is disposed on the inner wall of the casing body 1, and the second wall branch pipe 304 is connected to the combustion chamber of the engine. For example, multiple second wall branch pipes 304 can be spaced apart along the circumferential direction of the casing body 1; moreover, the first wall branch pipe 204 and the second wall branch pipe 304 can be staggered along the circumferential direction of the casing body 1. For example, the head ring of the casing body 1 may be provided with multiple gas fuel oil passage branch pipes 10, each corresponding to a second wall-mounted branch pipe 304. The outlet of the second wall-mounted branch pipe 304 is connected to the inlet of the gas fuel oil passage branch pipe 10, and the outlet of the gas fuel oil passage branch pipe 10 is connected to the fuel nozzle 5. The outlet of the fuel nozzle 5 is connected to the combustion chamber of the engine. For example, the outlet of the second wall-mounted branch pipe 304 and the inlet of the gas fuel oil passage branch pipe 10 can be connected to the outer nut 8 via the branch pipe connector 12.

[0040] The gas fuel inlet pipe 302, the second main pipe 303, and the second wall branch pipe 304 are all formed by a structure that protrudes outward relative to the inner wall of the casing body 1 and is hollow inside, with the hollow portion serving as a channel for liquid flow. For example, the cross-section of the channel of the protruding and hollow structure on the inner wall can be circular.

[0041] like Figure 6 As shown, the engine hot-end casing also includes an antifreeze external inlet 13 and an antifreeze external pipeline 14. For example, the antifreeze external inlet 13 can be installed on the outer side wall of the casing body 1 via an external mounting bracket. The inlet of the antifreeze external inlet 13 is connected to the antifreeze source, and the outlet of the antifreeze external inlet 13 is connected to one end of the antifreeze external pipeline 14. The liquid fuel inlet pipe 202 and the gas fuel inlet pipe 302 are both connected to the other end of the antifreeze external pipeline 14.

[0042] And / or, the engine hot end casing further comprises a catalyst external connection nozzle 15 and a catalyst external connection pipeline 16; for example, the catalyst external connection nozzle 15 can be installed on the outer side wall of the casing body 1 through an external connection fixing seat, the inlet of the catalyst external connection nozzle 15 is communicated with a catalyst source, and the outlet of the catalyst external connection nozzle 15 is communicated with one end of the catalyst external connection pipeline 16; the liquid fuel inlet pipe 202 and the gaseous fuel inlet pipe 302 are both communicated with the other end of the catalyst external connection pipeline 16.

[0043] Wherein, the liquid fuel oil line main pipe 2 and the gaseous fuel oil line main pipe 3 in the engine hot end casing can not be limited to only one, but also can be multiple.

[0044] Wherein, the same as the hot end casing in the prior art, the casing body 1 also has an inner casing, and the diffuser 7, the flame tube 4, the vortex finder 6 and the like are arranged in the casing body 1, which are all the prior art that can be obtained by the person skilled in the art, and will not be described here.

[0045] As shown in Figure 7 Another embodiment also provides a fuel intelligent control system, comprising the engine hot end casing according to any one of the above.

[0046] The fuel intelligent control system further comprises a liquid fuel tank 17, a gaseous fuel tank 18, a catalyst tank 19, an antifreeze tank 20, a control center 26, and a first pump body 21, a second pump body 22, a third pump body 23, a fourth pump body 24, a fuel temperature controller 25, a first control valve 27, a second control valve 28, a third control valve 29, a fourth control valve 30, a first temperature sensor 31, and a second temperature sensor 32 connected with the control center 26; the liquid fuel tank 17 is connected with the inlet of the liquid fuel inlet nozzle 201; the gaseous fuel tank 18 is connected with the inlet of the gaseous fuel inlet nozzle 301; the catalyst tank 19 is connected with the inlet of the catalyst external connection nozzle 15; the antifreeze tank 20 is connected with the inlet of the antifreeze external connection nozzle 13; the first pump body 21 and the first control valve 27 are arranged on the pipeline between the liquid fuel tank 17 and the liquid fuel inlet nozzle 201; the second pump body 22 and the second control valve 28 are arranged on the pipeline between the gaseous fuel tank 18 and the gaseous fuel inlet nozzle 301; the third pump body 23 and the third control valve 29 are arranged on the pipeline between the catalyst tank 19 and the catalyst external connection nozzle 15; the fourth pump body 24 and the fourth control valve 30 are arranged on the pipeline between the antifreeze tank 20 and the antifreeze external connection nozzle 13; the first temperature sensor 31 is arranged on the pipeline between the liquid fuel oil line branch 9 and the fuel nozzle 5, and is used to detect the temperature information of the liquid fuel entering the fuel nozzle 5 and feed back to the control center 26; the second temperature sensor 32 is arranged on the pipeline between the gaseous fuel oil line branch 10 and the fuel nozzle 5, and is used to detect the temperature information of the gaseous fuel entering the fuel nozzle 5 and feed back to the control center 26; the fuel temperature controller 25 is adapted to the liquid fuel tank 17 and the gaseous fuel tank 18, and is used to adjust the temperature of the fuel in the liquid fuel tank 17 and the gaseous fuel tank 18.

[0047] In use, the aviation engine is taken as an example for illustration, and other types of power devices such as ground engines can be taken as reference.

[0048] The liquid fuel used by the aviation engine includes aviation kerosene, SAF (sustainable aviation fuel), diesel, other alternative fuels, etc., and the gaseous fuel includes natural gas, hydrogen, etc.

[0049] Next, the working processes of the aviation engine in normal environment, low-temperature environment and high-temperature environment are described respectively.

[0050] Normal environment working process: when the engine starts to work, the control center 26 sends instructions, the second pump body 22 receives the instructions and starts to pressurize, as the pressure rises, the second control valve 28 opens, the fuel (the first fuel) enters the hot end cartridge from the gas fuel inlet nozzle 301, flows through the gas fuel inlet pipe 302 into the second main pipe 303, and then flows from the second main pipe 303 to the plurality of second wall surface branch pipes 304, the branch pipe connecting nozzle 12 to the gas fuel oil way branch pipe 10, and then to the fuel nozzle 5, and finally is sprayed into the flame cylinder 4 inside the combustion chamber by the fuel nozzle 5 to participate in the organization of combustion, produce high temperature gas, and do work on the turbine to realize the normal operation of the engine, generate thrust or output shaft power, etc. At this time, the thrust or power is small.

[0051] As the demand for thrust and power increases, the engine main oil way needs to be supplied with the second fuel. The control center 26 sends instructions, the first pump body 21 receives the instructions and starts to pressurize, as the pressure rises, the first control valve 27 opens, the fuel (the second fuel) enters the hot end cartridge from the liquid fuel inlet nozzle 201, the fuel flows through the liquid fuel inlet pipe 202, the first main pipe 203, the first wall surface branch pipe 204, the branch pipe connecting nozzle 12 into the liquid fuel oil way branch pipe 9, and then enters the fuel nozzle 5, and finally is sprayed into the flame cylinder 4 inside the combustion chamber. Two kinds of fuel work in two pipelines respectively, and finally organize combustion in the flame cylinder 4 to produce higher temperature gas to improve the work capacity of the turbine, so as to realize the increase of the engine thrust or output shaft power to meet the demand.

[0052] Low temperature environment working process: in the low temperature environment (less than-15℃), similar to the conventional environment working process, the difference is that when the first temperature sensor 31 and the second temperature sensor 32 monitor the fuel temperature in the liquid fuel oil way branch pipe 9 and the gas fuel oil way branch pipe 10 in real time, the feedback fuel problem is low, the control center 26 sends instructions to the fuel temperature controller 25, the fuel temperature controller 25 receives the instructions and starts to work to warm up the fuel in the liquid fuel tank 17 and the gas fuel tank 18 to raise the fuel temperature in the cartridge wall surface fuel pipe.

[0053] And for extremely low temperature, antifreeze needs to be supplemented in time to prevent the fuel from freezing. At this time, the control center 26 sends instructions, the fourth pump body 24 receives the instructions and starts to pressurize, as the pressure increases, the fourth control valve 30 opens, the antifreeze enters the hot end cartridge through the antifreeze external nozzle 13 and the antifreeze external pipe way 14 to realize the real-time addition of the low temperature environment antifreeze.

[0054] And, for part of the low temperature environment fuel can not be used normally, need to add catalyst, control center 26 sends out instructions, the third pump body 23 receives instructions to start pressurizing, with the increase of pressure, the third control valve 29 opens, the catalyst enters the hot end case through the catalyst external connection nozzle 15, catalyst external connection pipeline 16, realizes the real-time addition of low temperature environment catalyst. Ensure the normal operation of the engine in the extremely low temperature environment, expand the engine use envelope, protect the engine safety and flight safety. So set up, can realize the real-time control of catalyst, thereby increasing the fuel applicability, improving the applicability of the engine, which can be applied to more fuels.

[0055] High temperature environment working process: in high temperature environment (more than 150 DEG C), contrary to low temperature environment, when the first temperature sensor 31, the second temperature sensor 32 monitors the fuel temperature in the liquid fuel oil line branch pipe 9, gas fuel oil line branch pipe 10 in real time, the feedback fuel problem is high, the control center 26 sends out instructions, the fuel temperature controller 25 puts forward working instructions, the fuel temperature controller 25 receives instructions, starts working, cools the fuel in the liquid fuel tank 17, gas fuel tank 18, reduces the fuel temperature in the casing wall surface fuel pipe, thereby preventing the fuel temperature from being too high, causing coking in the pipe body and coking in the nozzle flow channel. Thus, the aeroengine is ensured to work stably in high temperature environment, the working range of the engine is widened, and the safety is improved.

[0056] In summary, the fuel intelligent control system in the application can realize the collaborative work of multiple fuels, catalysts, antifreezes and the like, improve the adaptability of the engine, widen the engine use boundary and safety reliability; moreover, the fuel distributor is cancelled, two fuel storage tanks are set, the catalyst tank 19, the antifreezing agent tank 20, the control valve, the temperature sensor, the fuel temperature controller 25 and the like are added, the working envelope of the multiple fuel engine in complex environment is widened, and the engine safety and service life are improved.

[0057] Obviously, the above embodiments are only examples for clearly illustrating, not limiting the implementation. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can also be made. Here, all the implementation is not required and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An engine hot-end casing, characterized in that, include: Casing body (1); A liquid fuel line main pipe (2) is integrally formed with the casing body (1) and disposed on the outer wall of the casing body (1). One end of the liquid fuel line main pipe (2) is connected to a liquid fuel source, and the other end is connected to the combustion chamber of the engine. The gas fuel oil main pipe (3) is integrally formed with the casing body (1) and is disposed on the inner side wall of the casing body (1). One end of the gas fuel oil main pipe (3) is connected to the gas fuel source, and the other end is connected to the combustion chamber of the engine.

2. The engine hot-end casing according to claim 1, characterized in that, The liquid fuel oil main pipe (2) includes a liquid fuel inlet nozzle (201), a liquid fuel inlet pipe (202), a first main pipe (203), and a first wall branch pipe (204) connected in sequence; The liquid fuel inlet (201) is disposed on the outer side wall of the casing body (1), and the liquid fuel inlet (201) is connected to the liquid fuel source; The liquid fuel inlet pipe (202) extends along the axial direction of the casing body (1) and is disposed on the outer side wall of the casing body (1); The first main tube (203) is arranged around the outer side wall of the casing body (1) in the circumferential direction; The first wall branch pipe (204) extends along the axial direction of the casing body (1) and is disposed on the outer side wall of the casing body (1). The first wall branch pipe (204) is connected to the combustion chamber of the engine.

3. The engine hot-end casing according to claim 2, characterized in that, The gas fuel oil main pipe (3) includes a gas fuel inlet (301), a gas fuel inlet pipe (302), a second main pipe (303), and a second wall branch pipe (304) connected in sequence. The inlet of the gas fuel inlet (301) is exposed outside the casing body (1), the outlet of the gas fuel inlet (301) is located on the inner side wall of the casing body (1), and the gas fuel inlet (301) is connected to the gas fuel source. The gas fuel inlet pipe (302) extends along the axial direction of the casing body (1) and is disposed on the inner side wall of the casing body (1); The second main tube (303) is arranged around the inner wall of the casing body (1) in the circumferential direction; The second wall branch pipe (304) extends along the axial direction of the casing body (1) and is disposed on the inner side wall of the casing body (1). The second wall branch pipe (304) is connected to the combustion chamber of the engine.

4. The engine hot-end casing according to claim 3, characterized in that, The liquid fuel inlet pipe (202), the first main pipe (203) and the first wall branch pipe (204) are all formed by a structure that protrudes outward from the outer wall of the casing body (1) and is hollow inside; The gas fuel inlet pipe (302), the second main pipe (303), and the second wall branch pipe (304) are all formed by a structure that protrudes outward relative to the inner wall of the casing body (1) and is hollow inside.

5. The engine hot-end casing according to claim 3, characterized in that, It also includes an antifreeze external connector (13) and an antifreeze external pipeline (14); The inlet of the antifreeze external connector (13) is connected to the antifreeze source, and the outlet of the antifreeze external connector (13) is connected to one end of the antifreeze external pipeline (14). Both the liquid fuel inlet pipe (202) and the gas fuel inlet pipe (302) are connected to the other end of the antifreeze external pipe (14); And / or, also includes a catalyst external connector (15) and a catalyst external pipeline (16); The inlet of the catalyst external connector (15) is connected to the catalyst source, and the outlet of the catalyst external connector (15) is connected to one end of the catalyst external pipeline (16). Both the liquid fuel inlet pipe (202) and the gas fuel inlet pipe (302) are connected to the other end of the catalyst external pipe (16).

6. The engine hot-end casing according to claim 3, characterized in that, A plurality of first wall branch pipes (204) are provided at intervals along the circumferential direction of the casing body (1); A plurality of second wall branch pipes (304) are provided at intervals along the circumferential direction of the casing body (1); The first wall branch (204) and the second wall branch (304) are staggered along the circumferential direction of the casing body (1).

7. The engine hot-end casing according to claim 6, characterized in that, It also includes a liquid fuel line branch pipe (9), a gas fuel line branch pipe (10), and a fuel nozzle (5); The head ring of the casing body (1) is provided with a plurality of liquid fuel oil circuit branch pipes (9), and the liquid fuel oil circuit branch pipes (9) are provided in a one-to-one correspondence with the first wall branch pipe (204). The outlet of the first wall branch pipe (204) is connected to the inlet of the liquid fuel oil circuit branch pipe (9), and the outlet of the liquid fuel oil circuit branch pipe (9) is connected to the fuel nozzle (5). The head ring of the casing body (1) is provided with a plurality of gas fuel oil circuit branch pipes (10), the gas fuel oil circuit branch pipes (10) are provided in a one-to-one correspondence with the second wall branch pipes (304), the outlet of the second wall branch pipes (304) is connected to the inlet of the gas fuel oil circuit branch pipes (10), and the outlet of the gas fuel oil circuit branch pipes (10) is connected to the fuel nozzle (5). The outlet of the fuel nozzle (5) is connected to the combustion chamber of the engine.

8. The engine hot-end casing according to claim 7, characterized in that, It also includes a branch pipe connector (12) and an outer nut (8); The outlet of the first wall branch pipe (204) is connected to the inlet of the liquid fuel oil circuit branch pipe (9) through the branch pipe connector (12) and the outer nut (8); The outlet of the second wall branch pipe (304) is connected to the inlet of the gas fuel oil circuit branch pipe (10) through the branch pipe connector (12) and the outer nut (8).

9. A fuel intelligent control system, characterized in that, The engine hot-end casing includes any one of claims 1-8.

10. The intelligent fuel control system according to claim 9, characterized in that, It also includes a liquid fuel tank (17), a gas fuel tank (18), a catalyst tank (19), an antifreeze tank (20), a control center (26), and a first pump body (21), a second pump body (22), a third pump body (23), a fourth pump body (24), a fuel temperature controller (25), a first control valve (27), a second control valve (28), a third control valve (29), a fourth control valve (30), a first temperature sensor (31), and a second temperature sensor (32); The liquid fuel tank (17) is connected to the inlet of the liquid fuel inlet (201); The gas fuel tank (18) is connected to the inlet of the gas fuel inlet (301); The catalyst box (19) is connected to the inlet of the catalyst external inlet (15); The antifreeze tank (20) is connected to the inlet of the antifreeze external inlet (13); The first pump body (21) and the first control valve (27) are both installed on the pipeline between the liquid fuel tank (17) and the liquid fuel inlet (201); The second pump body (22) and the second control valve (28) are both installed on the pipeline between the gas fuel tank (18) and the gas fuel inlet (301); The third pump body (23) and the third control valve (29) are both installed on the pipeline between the catalyst tank (19) and the catalyst external inlet (15); The fourth pump body (24) and the fourth control valve (30) are both installed on the pipeline between the antifreeze tank (20) and the antifreeze external connector (13); The first temperature sensor (31) is installed on the pipeline between the liquid fuel oil line branch pipe (9) and the fuel nozzle (5); The second temperature sensor (32) is installed on the pipeline between the gas fuel oil branch pipe (10) and the fuel nozzle (5); The fuel temperature controller (25) is adapted to the liquid fuel tank (17) and the gas fuel tank (18) and is used to regulate the temperature of the fuel in the liquid fuel tank (17) and the gas fuel tank (18).

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