Hydraulic variable-speed micro-miniature turbofan engine with multi-rotor structure

Abstract

The invention discloses a hydraulic variable-speed micro-miniature turbofan engine with a multi-rotor structure, and belongs to micro-miniature turbofan engines. The hydraulic variable-speed micro-miniature turbofan engine with the multi-rotor structure comprises a core engine and a fan machine box, wherein the core engine comprises a core engine main shaft, a fan and a speed reducer are arrangedat the front end of the core engine, the speed reducer comprises a speed reducer input shaft, a speed reducer shell, a speed reducer output shaft, a power turbine and a driving impeller, one end of the speed reducer output shaft is connected with the fan, the other end of the speed reducer output shaft is connected with the power turbine, one end of the speed reducer input shaft is connected withthe driving impeller, the other end of the speed reducer input shaft is connected with a coupler, the other end of the coupler is connected with one end of the core engine main shaft, and the fan machine box, the speed reducer shell and the core engine jointly form an outer duct. According to the hydraulic variable-speed micro-miniature turbofan engine with the multi-rotor structure, the rotor structure is simplified, and the supercharge ratio caused by the fan is used for improving the intake pressure of the core engine, and improving the fuel economy; not only is the structure simple, but also the cost is reduced at the same time, and the manufacturing difficulty is reduced.

Description

technical field

[0001] The present invention relates to a miniature turbofan engine, more specifically, to a miniature turbofan engine with hydraulically variable speed and multi-rotor structure. Background technique

[0002] With the continuous expansion of micro-aircraft in the fields of national defense, scientific research, and civil use, new and higher requirements have been put forward for the aircraft in terms of multi-mission, long range, high altitude, and high speed. Compared with the turbojet engine, the turbofan engine has better fuel economy, but the unique multi-rotor structure of the turbofan engine also brings great obstacles to the miniaturization of the engine. The diameter of the fan of the same turbofan engine is much larger than that of the rotor of the core engine, and the optimal speed of their work is very different, and they cannot run coaxially. Usually, the fan drive shaft of a turbofan engine with a dual-rotor structure needs to pass through the ...

Examples

Embodiment 1

[0029] like figure 1 As shown, a micro turbofan engine with hydraulically variable speed and multi-rotor structure includes a core engine 3 and a fan casing 1. The core engine 3 includes a core machine main shaft 31, and the front end of the core engine 3 is provided with a fan 11 and a speed reducer. The reducer includes a reducer input shaft 23, a reducer housing 2, a reducer output shaft 27, a power turbine 26 and a driving impeller 24. One end of the reducer output shaft 27 is connected to the fan 11, and the other end of the reducer output shaft 27 is connected to the power turbine 26. One end of the input shaft 23 of the reducer is connected with the driving impeller 24, the other end of the input shaft 23 of the reducer is connected with the coupling 4, the other end of the coupling 4 is connected with the main shaft 31 of the core machine, the fan case 1, the reducer The casing 2 and the core engine 3 together form an outer duct 12 . Wherein, the front end of the core...

Embodiment 2

[0032] like figure 1 As shown, the reducer housing 2 is provided with an independently rotating reducer output shaft 27 and an independently rotating reducer input shaft 23 , and there is no rigid connection between the reducer input shaft 23 and the reducer output shaft 27 . Compared with the reduction gearbox structure of large engines and the belt reducer structure of some micro engines, the rotor structure of the turbofan engine is greatly simplified, and the problem of wear and tear of the reduction gears is avoided, so that the hydraulic variable speed multi-rotor structure micro turbofan The engine reducer requires no lubrication and requires no maintenance for transmission parts, resulting in longer life.

Embodiment 3

[0034] like figure 2 As shown, the reducer housing 2 is respectively provided with a reducer outer flow channel 22 and a reducer inner flow channel 25 , and the reducer outer flow channel 22 communicates with the reducer inner flow channel 25 . Wherein, the reducer cooling fin 21 is arranged on the reducer casing 2 close to the reducer outer flow channel 22 . The reducer casing 2 is filled with liquid.

[0035] As a preferred embodiment, the outer diameter of the driving impeller 24 is smaller than the outer diameter of the power turbine 26, using hydraulic flow to transfer energy, and balance the speed difference between the fan 11 and the core machine, so as to achieve the purpose of working at the optimum speed respectively , thereby improving the cruising range and economy of the aircraft.

[0036] like figure 1 and 2As shown, those skilled in the art can implement the present invention as a micro-miniature turbofan engine with hydraulically variable speed and multi-r...

technical field

[0001] The present invention relates to a miniature turbofan engine, more specifically, to a miniature turbofan engine with hydraulically variable speed and multi-rotor structure. Background technique

[0002] With the continuous expansion of micro-aircraft in the fields of national defense, scientific research, and civil use, new and higher requirements have been put forward for the aircraft in terms of multi-mission, long range, high altitude, and high speed. Compared with the turbojet engine, the turbofan engine has better fuel economy, but the unique multi-rotor structure of the turbofan engine also brings great obstacles to the miniaturization of the engine. The diameter of the fan of the same turbofan engine is much larger than that of the rotor of the core engine, and the optimal speed of their work is very different, and they cannot run coaxially. Usually, the fan drive shaft of a turbofan engine with a dual-rotor structure needs to pass through the ...

Examples

Embodiment 1

[0029] like figure 1 As shown, a micro turbofan engine with hydraulically variable speed and multi-rotor structure includes a core engine 3 and a fan casing 1. The core engine 3 includes a core machine main shaft 31, and the front end of the core engine 3 is provided with a fan 11 and a speed reducer. The reducer includes a reducer input shaft 23, a reducer housing 2, a reducer output shaft 27, a power turbine 26 and a driving impeller 24. One end of the reducer output shaft 27 is connected to the fan 11, and the other end of the reducer output shaft 27 is connected to the power turbine 26. One end of the input shaft 23 of the reducer is connected with the driving impeller 24, the other end of the input shaft 23 of the reducer is connected with the coupling 4, the other end of the coupling 4 is connected with the main shaft 31 of the core machine, the fan case 1, the reducer The casing 2 and the core engine 3 together form an outer duct 12 . Wherein, the front end of the core...

Embodiment 2

[0032] like figure 1 As shown, the reducer housing 2 is provided with an independently rotating reducer output shaft 27 and an independently rotating reducer input shaft 23 , and there is no rigid connection between the reducer input shaft 23 and the reducer output shaft 27 . Compared with the reduction gearbox structure of large engines and the belt reducer structure of some micro engines, the rotor structure of the turbofan engine is greatly simplified, and the problem of wear and tear of the reduction gears is avoided, so that the hydraulic variable speed multi-rotor structure micro turbofan The engine reducer requires no lubrication and requires no maintenance for transmission parts, resulting in longer life.

Embodiment 3

[0034] like figure 2 As shown, the reducer housing 2 is respectively provided with a reducer outer flow channel 22 and a reducer inner flow channel 25 , and the reducer outer flow channel 22 communicates with the reducer inner flow channel 25 . Wherein, the reducer cooling fin 21 is arranged on the reducer casing 2 close to the reducer outer flow channel 22 . The reducer casing 2 is filled with liquid.

[0035] As a preferred embodiment, the outer diameter of the driving impeller 24 is smaller than the outer diameter of the power turbine 26, using hydraulic flow to transfer energy, and balance the speed difference between the fan 11 and the core machine, so as to achieve the purpose of working at the optimum speed respectively , thereby improving the cruising range and economy of the aircraft.

[0036] like figure 1 and 2As shown, those skilled in the art can implement the present invention as a micro-miniature turbofan engine with hydraulically variable speed and multi-r...

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