SUPER-BYPASS GAS TURBINE ENGINE WITH BIROTARY BLOWER. Russian patent published in 2009 - IPC F02K3/72 

FIELD: engines and pumps.

SUBSTANCE: super-bypass gas turbine engine incorporates a birotary blower with its rotors being linked up, via an idler gear, with a simple coaxial reduction gear. The blower rotor, first along air stream, accommodates the reduction gear external gearing driven gear. The blower rear rotor accommodates internal gearing driven gear. The reduction gear idler gear comprises the front and rear parts, along the air stream, with different number of teeth. The invention covers gear ratios of the reduction gear idler gear rear, along air flow, the number of teeth of internal gearing gear, the number of teeth of the reduction gear idler gear front part and the number of teeth of external gearing gear. It also protects the ratios between the mean diameter of the idler gear rear bearing rolling bodies and that of the front bearing. The proposed invention allows reducing loads on rolling bearings to up the turbine reliability and down its noise. Note also that the birotary blower is driven, via a preset gear ration reduction gear, from the low-pressure turbine, the driving force being transmitted to the blower front and rear rotors.

EFFECT: higher reliability and lower noise.

2 dwg