Hybrid turbofan engine configuration with integrated design of turbine and motor

Abstract

The invention relates to a turbine and motor integrated hybrid turbofan engine configuration which comprises a turbofan engine system, a liquid hydrogen cooling system and a fuel cell system. The liquid hydrogen cooling system is used for cooling a motor coil winding of an integrated fan system of the turbofan engine system and a generator coil winding of an integrated booster stage system, and hydrogen formed after liquid hydrogen absorbs heat and is evaporated serves as fuel of a combustion chamber and a fuel cell; the fuel cell system is used for supplementing output electric power of the engine and assisting in driving the fan. The integrated booster stage system is used for generating electricity, the integrated fan system is electrically driven, decoupling of the fan and the low-pressure turbine is achieved, the rotating speed of the fan can be further reduced, the bypass ratio of the engine is increased, the coil winding is cooled through the liquid hydrogen cooling system, the heat dissipation problem of the motor and the generator is solved, and the service life of the motor and the generator is prolonged. The fuel cell assists in outputting electric power, and the total efficiency of the power system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft propulsion systems, and in particular to a hybrid power turbofan engine configuration with an integrated impeller and motor. Background Art

[0002] In order to increase the bypass ratio of commercial turbofan engines to improve propulsion efficiency and reduce fuel consumption, the fan diameter of the engine has been increasing year by year. When the speed is determined, the fan diameter has a maximum value due to the fan tip speed. If the bypass ratio is to be further improved, the fan speed needs to be reduced to increase the fan diameter.

[0003] The existing technology uses a three-rotor structure and a gear reducer to further reduce the fan speed. However, due to the existence of an intermediate-pressure turbine, the support structure and lubrication system of the three-rotor turbofan engine are very complex, making the engine bulky. Due to the introduction of a gear reducer, the operating speed of the low-pressure turbine of the gear-driven engine is increased, but its critical speed cannot avoid the operating speed range, and the gear reducer is difficult to design, and lubrication and heat dissipation are difficult. The electrification of the power system provides a new idea for solving this problem. Using an electric motor to drive the fan can achieve decoupling of the fan and the turbine, reduce the fan speed to increase the bypass ratio, and flexibly control the fan speed by controlling the frequency of the AC power, so that the fan can achieve optimal performance under different working conditions.

[0004] The motor is the core of the hybrid power system, but the current motor system power density is still insufficient to meet the needs of large electric propulsion systems. At the same time, high-power aviation motors have large electromagnetic loads, and traditional air cooling and lubricating oil cooling are difficult to solve the heat dissipation problem. Excessive temperature rise will seriously affect the safety of the aircraft.

[0005] Therefore, it is necessary to provide a hybrid turbofan engine configuration with an integrated impeller and motor to solve the above problems. Summary of the invention

[0006] The present invention provides a hybrid turbofan engine configuration with an integrated impeller and motor design, which utilizes the motor to achieve decoupling of the fan and the low-pressure turbine, can further reduce the fan speed, increase the bypass ratio, and solve the existing problems through a liquid hydrogen cooling system, an integrated fan system and an integrated boost stage system.

[0007] A hybrid turbofan engine configuration with an integrated impeller and motor of the present invention adopts the following technical solutions, including: A turbofan engine system, comprising: an integrated fan system, an integrated boost stage system, a high-pressure compressor, a combustion chamber, a high-pressure turbine and a low-pressure turbine; wherein the integrated fan system is used to compress an external airflow by driving the fan to rotate with electric energy, and the compressed airflow is divided into two main streams through a splitter casing, and flows into an outer duct and an inner duct respectively; the airflow flowing into the outer duct is discharged into the atmosphere through an outer duct nozzle; the integrated boost stage system compresses the airflow flowing into the inner duct and generates alternating current at the same time; the compressed airflow is further compressed by the high-pressure compressor and enters the combustion chamber, and the combustion chamber outlet gas is ejected from the inner duct nozzle after passing through a high-pressure turbine and a low-pressure turbine; the high-pressure compressor is transmission-connected to the high-pressure turbine, and the low-pressure turbine is transmission-connected to the boost stage of the integrated boost stage system; A fuel cell system that is used to supplement the output power of the engine and assist in driving the integrated fan system; and a liquid hydrogen cooling system for cooling the motor coil windings of the integrated fan system and the generator coil windings of the integrated boost stage system, wherein the hydrogen gas formed by the liquid hydrogen absorbing heat and evaporating is used as fuel for the fuel cell system and the combustion chamber.

[0008] Preferably, the integrated fan system comprises: A fan and a blade tip ring, wherein the blade tips of the fan are connected to the blade tip ring, and the blade tip ring is provided with a first permanent magnet of the motor; And the motor coil winding is arranged on the fan casing opposite to the blade tip ring, and the input end of the motor coil winding is connected to the busbar.

[0009] Preferably, the integrated boosting stage system comprises: A booster stage and a blade root ring, wherein the blade tenon of the booster stage is connected to the blade root ring, and the blade root ring is provided with a second permanent magnet of the generator, wherein the booster stage is connected to the low-pressure turbine through a low-pressure shaft; The generator coil winding is arranged on the inner casing, and the output end thereof is connected to the busbar.

[0010] Preferably, the liquid hydrogen cooling system comprises: A first liquid hydrogen cooling device, which is used to cool the motor coil winding; A second liquid hydrogen cooling device, which is used to cool the generator coil winding; The liquid hydrogen storage bottle is used to store liquid hydrogen and provide liquid hydrogen to the first liquid hydrogen cooling device and the second liquid hydrogen cooling device.

[0011] Preferably, the fuel cell system comprises: A hydrogen fuel cell, whose power output terminal is connected to the input terminal of the first transformer, and the output terminal of the first transformer is connected to the busbar; A hydrogen tank, the inlet of which is connected to the outlets of the first liquid hydrogen cooling device and the second liquid hydrogen cooling device respectively, and the outlet of which is connected to the hydrogen fuel cell and the combustion chamber; An air duct, one end of which is used to draw out compressed air from the boost stage, and the other end of which is connected to the fuel cell; and an exhaust pipe, the inlet end of which is connected to the fuel cell and the outlet end of which is connected to the combustion chamber, for discharging the exhaust gas generated by the fuel cell into the combustion chamber.

[0012] Preferably, the first liquid hydrogen cooling device is arranged on the fan casing, and it includes a first cooling chamber, the inlet of the first cooling chamber is connected to the liquid hydrogen storage bottle, and the outlet of the first cooling chamber is connected to the hydrogen tank, wherein the motor coil winding is arranged in the first cooling chamber.

[0013] Preferably, the second liquid hydrogen cooling device is arranged on the inner channel casing, and it includes a second cooling chamber, the inlet of the second cooling chamber is connected to the liquid hydrogen storage bottle, and the outlet of the second cooling chamber is connected to the hydrogen tank, wherein the generator coil winding is arranged in the second cooling chamber.

[0014] Preferably, the hydrogen fuel cell adopts any one of an alkaline fuel cell, a phosphoric acid fuel cell, a proton exchange membrane fuel cell, a molten carbonate fuel cell, and a solid oxide fuel cell.

[0015] Preferably, the busbar and the motor coil winding are connected via a first cable, and an inverter, a second transformer and a frequency converter are arranged on the first cable from the busbar to the motor coil winding.

[0016] Preferably, the generator coil winding is connected to the busbar via a second cable, and a third transformer and a rectifier are provided on the second cable from the generator coil winding to the busbar.

[0017] The beneficial effects of the present invention are: 1. The present invention uses electric energy to drive the fan of the integrated fan system with an integrated impeller and motor to rotate, and the integrated supercharging stage system with an integrated impeller and generator to generate electricity, cancels the connection structure between the supercharging stage and the fan, realizes the decoupling of the fan and the turbine, and can further reduce the fan speed to increase the fan diameter, improve the bypass ratio, and reduce the fuel consumption rate. At the same time, the electric drive form can flexibly adjust the fan speed so that the fan and the low-pressure turbine can work at their respective optimal speeds.

[0018] 2. The present invention adopts an integrated fan system with an integrated impeller and motor, and an integrated boost stage system with an integrated impeller and generator, so that the structure of the motor and generator is more compact, the weight of the engine structure is reduced, and the design difficulty of the motor and generator due to space layout and heat dissipation constraints is reduced.

[0019] 3. The present invention solves the heat dissipation problem of the motor and the generator by setting up a liquid hydrogen cooling system and utilizing the liquid hydrogen in the liquid hydrogen cooling system to cool the motor coil windings and the generator coil windings, thereby allowing the voltage of the motor coil windings to be further increased, thereby improving the energy conversion efficiency and power density of the motor.

[0020] 4. The present invention provides a fuel cell system to assist in the output of electrical energy, supplementing the electrical power output of the engine and making the energy source of the motor more diverse. At the same time, hydrogen fuel cells are clean and pollution-free, and have higher efficiency than engines, which can reduce carbon emissions and improve the overall efficiency of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 The overall structural schematic diagram of a hybrid turbofan engine configuration of the present invention with an integrated impeller and motor design; Figure 2 Schematic diagram of the structure of the integrated fan system in an embodiment of the present invention.

[0023] In the figure: 1. integrated fan system; 2. integrated boost stage system; 3. high pressure compressor; 4. combustion chamber; 5. high pressure turbine; 6. low pressure turbine; 7. fan casing; 8. liquid hydrogen storage bottle; 9. hydrogen tank; 10. air bleed pipe; 11. fan; 12. blade tip ring; 13. motor coil winding; 14. first liquid hydrogen cooling device; 15. fuel cell; 16. exhaust pipe; 17. inverter; 18. second transformer; 19. rectifier; 20. frequency converter; 21. boost stage; 22. blade root ring; 23. , generator coil winding; 24, second liquid hydrogen cooling device; 25, first transformer; 26, busbar; 27, other loads; 28, first cable; 29, second cable; 30, third cable; 31, inner nozzle; 32, outer nozzle; 33, third transformer; 34, first permanent magnet; 81, first liquid hydrogen input pipe; 82, second liquid hydrogen input pipe; 83, first hydrogen output pipe; 84, second hydrogen output pipe; 85, total hydrogen input pipe; 91, first hydrogen delivery pipe; 92, second hydrogen delivery pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] An embodiment of a hybrid turbofan engine configuration with an integrated impeller and motor of the present invention is as follows: Figure 1 As shown, it includes: a turbofan engine system, a liquid hydrogen cooling system and a fuel cell system. The liquid hydrogen cooling system is used to cool the motor coil winding 13 of the integrated fan system 1 and the generator coil winding 23 of the integrated boost stage system 2. The hydrogen formed after the liquid hydrogen absorbs heat and evaporates is used as the fuel of the combustion chamber 4 and the fuel cell 15; the fuel cell system is used to supplement the output electric power of the engine and assist in driving the integrated fan system 1.

[0026] like Figure 1 As shown, the turbofan engine system includes: an integrated fan system 1 with an integrated design of an impeller and a generator, an integrated boost stage system 2 with an integrated design of an impeller and a generator, a high-pressure compressor 3, a combustion chamber 4, a high-pressure turbine 5 and a low-pressure turbine 6; wherein the integrated fan system 1 uses electric energy to drive the fan 11 to rotate, compresses the external airflow, and the compressed airflow is divided into two main streams through the splitter casing, and flows into the outer duct and the inner duct respectively; the airflow flowing into the outer duct is discharged into the atmosphere from the outer duct nozzle 32; the integrated boost stage system 2 compresses the airflow flowing into the inner duct and generates alternating current at the same time; the high-pressure compressor 3 further compresses the airflow from the boost stage 21, and the compressed airflow flows into the combustion chamber 4; the combustion chamber 4 uses the hydrogen formed by the heat absorption and evaporation of liquid hydrogen in the liquid hydrogen cooling system after flowing through the motor coil winding 13 of the integrated fan system 1 and the generator coil winding 23 of the integrated boost stage system 2 as fuel, and uses the compressed air from the high-pressure compressor 3 as an oxidant to produce a combustion reaction. After hydrogen burns, a large amount of heat is released, which increases the total temperature of the air flow. The combustion gas is discharged into the high-pressure turbine 5. The combustion chamber uses hydrogen as fuel, which is clean and pollution-free, and is beneficial to environmental protection. The high-pressure compressor 3 is connected to the high-pressure turbine 5 through a high-pressure shaft, and the high-pressure turbine 5 drives the high-pressure compressor 3 to rotate. In the integrated boost stage system 2, the boost stage 21 and the blade root ring 22 are rotating parts, and the rotating parts are connected to the low-pressure turbine 6 through a low-pressure shaft.

[0027] Exemplarily, in one embodiment, the integrated fan system 1 includes: a fan 11, a blade tip ring 12, a first permanent magnet 34 of the motor, and a motor coil winding 13, wherein the first permanent magnet 34 is arranged on the blade tip ring 12 of the fan 11 blade, that is, Figure 2As shown, in this embodiment, the blade tip ring 12 has a plurality of grooves along the circumferential direction, and the first permanent magnet 34 is installed in the grooves; the motor coil winding 13 is arranged inside the first liquid hydrogen cooling device 14 on the fan casing 7 opposite to the blade tip ring 12, and the input end of the motor coil winding 13 is connected to the bus 26 through the first cable 28, and the first cable 28 is provided with an inverter 17, a second transformer 18, and a frequency converter 20, wherein the electric energy is provided by the bus 26, converted into alternating current by the inverter 17, changed in voltage by the second transformer 18, and changed in frequency by the frequency converter 20, and then input to the motor coil winding 13 by the first cable 28, wherein the bus 26 is a high-voltage DC bus.

[0028] Exemplarily, in one embodiment, the integrated boost stage system 2 includes: a boost stage 21, a blade root ring 22, a second permanent magnet of a generator and a generator coil winding 23, the blade tenon of the boost stage 21 is connected to the blade root ring 22, and the blade root ring 22 is provided with a second permanent magnet of the generator, wherein the boost stage 21 is connected to the low-pressure turbine 6 through a low-pressure shaft; the generator coil winding 23 is arranged inside a second liquid hydrogen cooling device 24 on an inner casing, and the output end of the generator coil winding 23 is connected to a bus 26 through a second cable 29, and the bus 26 is connected to other loads 27, and a third transformer 33 and a rectifier 19 are provided on the second cable 29, that is, the generator coil winding 23 outputs alternating current, and the alternating current enters the transformer 33 through the second cable 29 to change the voltage, and then is converted into direct current by the rectifier 19 and input into the bus 26.

[0029] Exemplarily, the fuel cell system includes: a hydrogen fuel cell 15, a hydrogen tank 9, an air duct 10 and an exhaust pipe 16, the power output end of the hydrogen fuel cell 15 is connected to the input end of the first transformer 25 through a third cable 30, and the output end of the first transformer 25 is connected to the bus 26 through a cable; the inlet of the hydrogen tank 9 is connected to the outlet of the first liquid hydrogen cooling device 14 through the total hydrogen input pipe 85 and the first hydrogen output pipe 83 in sequence, and the inlet of the hydrogen tank 9 is connected to the outlet of the second liquid hydrogen cooling device 14 through the total hydrogen input pipe 85 and the second hydrogen output pipe 84 in sequence. The outlet of the hydrogen cooling device 24 is connected, the outlet of the hydrogen tank 9 delivers fuel to the hydrogen fuel cell 15 through the first hydrogen delivery pipe 91, and the outlet of the hydrogen tank 9 delivers fuel to the combustion chamber 4 through the second hydrogen delivery pipe 92; one end of the air duct 10 is used to draw out compressed air from after the boost stage 21, and the other end of the air duct 10 is connected to the fuel cell 15; the inlet end of the exhaust pipe 16 is connected to the fuel cell 15, and the outlet end of the exhaust pipe 16 is connected to the combustion chamber 4, and the exhaust pipe 16 is used to discharge the exhaust gas generated by the fuel cell 15 into the combustion chamber 4.

[0030] It should be noted that the hydrogen fuel cell 15 adopts any one of an alkaline fuel cell, a phosphoric acid fuel cell, a proton exchange membrane fuel cell, a molten carbonate fuel cell, and a solid oxide fuel cell. Specifically, the type of hydrogen fuel cell can be flexibly selected according to the characteristics of different types of hydrogen fuel cells, the installation position of the hydrogen fuel cell can be flexibly selected according to the operating temperature of different types of batteries, and a battery pack can be formed using several hydrogen fuel cells according to the required power size.

[0031] Exemplarily, in one embodiment, the liquid hydrogen cooling system includes: a first liquid hydrogen cooling device 14, a second liquid hydrogen cooling device 24 and a liquid hydrogen storage bottle 8, wherein the first liquid hydrogen cooling device 14 is used to cool the motor coil winding 13; the second liquid hydrogen cooling device 24 is used to cool the generator coil winding 23; the liquid hydrogen storage bottle 8 is used to store liquid hydrogen and provide liquid hydrogen to the first liquid hydrogen cooling device 14 and the second liquid hydrogen cooling device 24.

[0032] Among them, the first liquid hydrogen cooling device 14 is arranged on the fan casing 7, and the first liquid hydrogen cooling device 14 includes a first cooling chamber. The inlet of the first cooling chamber is connected with the liquid hydrogen storage bottle 8 through the first liquid hydrogen input pipe 81, and the outlet of the first cooling chamber is connected with the hydrogen tank 9 through the first hydrogen output pipe 83 and the total hydrogen input pipe 85 in sequence. Among them, the motor coil winding 13 is arranged in the first cooling chamber, that is, the motor coil winding 13 is cooled by liquid hydrogen.

[0033] Among them, the second liquid hydrogen cooling device 24 is arranged on the inner channel casing, and the second liquid hydrogen cooling device 24 includes a second cooling chamber, the second cooling chamber is connected with the liquid hydrogen storage bottle 8 through the second liquid hydrogen input pipe 82, and the outlet of the second cooling chamber is connected with the hydrogen tank 9 through the second hydrogen output pipe 84 and the total hydrogen input pipe 85 in turn, wherein the generator coil winding 23 is arranged in the second cooling chamber, that is, the generator coil winding 23 is cooled by liquid hydrogen.

[0034] Preferably, the busbar 26 and the motor coil winding 13 are connected via an input first cable 28 , and the inverter 17 , the second transformer 18 , and the frequency converter 20 are arranged on the input first cable 28 from the busbar 26 to the motor coil winding 13 .

[0035] It should be noted that the hydrogen fuel cell 15, the hydrogen tank 9 and the liquid hydrogen storage bottle 8 can be embedded inside the engine or placed outside the engine.

[0036] How it works The integrated fan system 1 with integrated design of impeller and motor uses the electric energy generated by the integrated boost stage system 2 and the fuel cell 15 to drive the fan 11 to compress the external airflow. The compressed airflow is divided into two main streams through the splitter casing, one flows into the outer duct and the other flows into the inner duct. The airflow flowing into the outer duct is discharged into the atmosphere from the outer duct nozzle 32. Since the fan 11 accelerates the airflow to eject backward, the outer duct generates thrust. The airflow flowing into the inner duct enters the integrated boost stage system 2 with integrated design of impeller and generator. The integrated boost stage system 2 continues to compress it. At the same time, the boost stage 21 drives the blade root ring 22 embedded with the second permanent magnet to rotate, so that the generator coil winding generates alternating current, and the compressed gas flows into the high-pressure compressor. The high-pressure compressor 3 further compresses the airflow from the boost stage 21, and the compressed high-pressure gas flows into the combustion chamber 4. The liquid hydrogen in the liquid hydrogen cooling system cools the motor coil winding 13 of the integrated fan system 1 and the generator coil winding 23 of the integrated boost stage system 2. The hydrogen formed after endothermic evaporation is used as the fuel of the combustion chamber 4. The combustion of hydrogen in the combustion chamber 4 releases a large amount of heat to increase the total temperature of the airflow. The airflow after combustion flows through the high-pressure turbine 5 and the low-pressure turbine 6, driving the high-pressure turbine 5 and the low-pressure turbine 6 to rotate. At the same time, the high-pressure turbine 5 drives the high-pressure compressor 3 to rotate, and the low-pressure turbine 6 drives the boost stage 21 to rotate. The airflow after the low-pressure turbine 6 flows into the inner nozzle 31, expands and accelerates therein to eject backwards, generating thrust.

[0037] The working principle of the integrated fan system 1 is as follows: the direct current in the bus 26 is converted into alternating current of a certain voltage and frequency by the inverter 17, the second transformer 18, and the frequency converter 20, and flows into the motor coil winding 13. The alternating current in the motor coil winding 13 generates a rotating magnetic field, and the rotating magnetic field interacts with the first permanent magnet 34 installed at the tip ring 12 of the fan 11 blade to rotate the fan 11. The speed of the fan 11 can be changed by changing the frequency of the alternating current, so that the fan 11 can adapt to various working conditions. The generator coil winding 13 is cooled by liquid hydrogen.

[0038] The power generation principle of the integrated supercharging stage system 2 is as follows: the gas drives the low-pressure turbine 6 to rotate, and the supercharging stage 21 and the blade root ring 22 embedded with the second permanent magnet are driven to rotate through the low-pressure shaft. Since the generator coil winding 23 is stationary and the second permanent magnet is rotating, the generator coil winding 23 continuously cuts the magnetic flux lines to generate alternating current. The alternating current in the generator coil winding 23 is transformed by the third transformer 33 and rectified by the rectifier 19 to become direct current, and finally merged into the bus 26, thereby realizing power generation. The generator coil winding 23 is cooled by liquid hydrogen.

[0039] The working principle of the fuel cell 15 is as follows: The liquid hydrogen cooling system cools the motor coil winding 13 of the integrated fan system 1 and the generator coil winding 23 of the integrated boost stage system 2, and the liquid hydrogen absorbs heat and evaporates to convert into hydrogen. The hydrogen flows into the hydrogen tank 9 for temporary storage. After being stabilized by the hydrogen tank 9, part of the hydrogen enters the fuel cell 15 as fuel, and part of the compressed air drawn out from the boost stage 21 flows into the fuel cell 15 through the air duct 10 as an oxidant. A redox reaction occurs in the fuel cell 15 to generate direct current, and the current flows into the bus 26 after being transformed by the first transformer 25. The tail gas of the fuel cell 15 contains part of hydrogen, air and water, which is discharged into the combustion chamber 4 through the exhaust pipe 16 for combustion. The hydrogen fuel cell has high thermal efficiency and is clean and pollution-free.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hybrid turbofan engine configuration with an integrated impeller and motor, characterized in that: include: A turbofan engine system, comprising: an integrated fan system, an integrated boost stage system, a high-pressure compressor, a combustion chamber, a high-pressure turbine and a low-pressure turbine; wherein the integrated fan system is used to compress an external airflow by driving the fan to rotate with electric energy, and the compressed airflow is divided into two airflows through a splitter casing, and flows into an outer duct and an inner duct respectively; the airflow flowing into the outer duct is discharged into the atmosphere through an outer duct nozzle; the integrated boost stage system is used to compress the airflow flowing into the inner duct and generate alternating current at the same time; the compressed airflow is compressed by the high-pressure compressor and then enters the combustion chamber, and the combustion chamber outlet gas is ejected from the inner duct nozzle after passing through the high-pressure turbine and the low-pressure turbine; the high-pressure compressor is transmission-connected to the high-pressure turbine, and the low-pressure turbine is transmission-connected to the boost stage of the integrated boost stage system; A fuel cell system that is used to supplement the output power of the engine and assist in driving the integrated fan system; and a liquid hydrogen cooling system for cooling the motor coil windings of the integrated fan system and the generator coil windings of the integrated boost stage system, wherein the hydrogen gas formed by the liquid hydrogen absorbing heat and evaporating is used as fuel for the fuel cell system and the combustion chamber.

2. A hybrid turbofan engine configuration with an integrated impeller and motor according to claim 1, characterized in that: The integrated fan system includes: A fan and a blade tip ring, wherein the blade tips of the fan are connected to the blade tip ring, and the blade tip ring is provided with a first permanent magnet of the motor; And the motor coil winding is arranged on the fan casing opposite to the blade tip ring, and the input end of the motor coil winding is connected to the busbar.

3. A hybrid turbofan engine configuration with an integrated impeller and motor according to claim 2, characterized in that: The integrated booster stage system includes: A booster stage and a blade root ring, wherein the blade tenon of the booster stage is connected to the blade root ring, and the blade root ring is provided with a second permanent magnet of the generator, wherein the booster stage is connected to the low-pressure turbine through a low-pressure shaft; The generator coil winding is arranged on the inner casing, and the output end thereof is connected to the load through the busbar.

4. The hybrid turbofan engine configuration with an integrated impeller and motor according to claim 3, characterized in that: Liquid hydrogen cooling system includes: A first liquid hydrogen cooling device, which is used to cool the motor coil winding; A second liquid hydrogen cooling device, which is used to cool the generator coil winding; The liquid hydrogen storage bottle is used to store liquid hydrogen and provide liquid hydrogen to the first liquid hydrogen cooling device and the second liquid hydrogen cooling device.

5. The hybrid turbofan engine configuration with an integrated impeller and motor according to claim 4, characterized in that: The fuel cell system includes: A hydrogen fuel cell, whose power output terminal is connected to the input terminal of the first transformer, and the output terminal of the first transformer is connected to the busbar; A hydrogen tank, the inlet of which is connected to the outlets of the first liquid hydrogen cooling device and the second liquid hydrogen cooling device respectively, and the outlet of which is connected to the hydrogen fuel cell and the combustion chamber; An air duct, one end of which is used to draw out compressed air from the boost stage, and the other end of which is connected to the fuel cell; and an exhaust pipe, the inlet end of which is connected to the fuel cell and the outlet end of which is connected to the combustion chamber, for discharging the exhaust gas generated by the fuel cell into the combustion chamber.

6. A hybrid turbofan engine configuration with an integrated impeller and motor according to claim 5, characterized in that: The first liquid hydrogen cooling device is arranged on the fan casing, and comprises a first cooling chamber, the inlet of the first cooling chamber is connected with the liquid hydrogen storage bottle, the outlet of the first cooling chamber is connected with the hydrogen tank, wherein the motor coil winding is arranged in the first cooling chamber.

7. The hybrid turbofan engine configuration with an integrated impeller and motor according to claim 5, characterized in that: The second liquid hydrogen cooling device is arranged on the inner channel casing, and it includes a second cooling chamber, the inlet of the second cooling chamber is connected with the liquid hydrogen storage bottle, and the outlet of the second cooling chamber is connected with the hydrogen tank, wherein the generator coil winding is arranged in the second cooling chamber.

8. The hybrid turbofan engine configuration with an integrated impeller and motor according to claim 5, characterized in that: The hydrogen fuel cell uses any one of an alkaline fuel cell, a phosphoric acid fuel cell, a proton exchange membrane fuel cell, a molten carbonate fuel cell, and a solid oxide fuel cell.

9. The hybrid turbofan engine configuration with an integrated impeller and motor according to claim 1, characterized in that: The busbar and the motor coil winding are connected through a first cable, and an inverter, a second transformer and a frequency converter are arranged on the first cable from the busbar to the motor coil winding.

10. The hybrid turbofan engine configuration with an integrated impeller and motor according to claim 1, characterized in that: The generator coil winding is connected to the busbar through a second cable, and a third transformer and a rectifier are arranged on the second cable from the generator coil winding to the busbar.

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