BYPASS GAS-TURBINE ENGINE Russian patent published in 2009 - IPC F02K3/72 

FIELD: engines and pumps.

SUBSTANCE: in bypass gas-turbine engine with fan drive via simple coaxial reduction gear, fan is arranged as birotatory. The first impeller of birotatory fan downstream air flow is arranged with the possibility of rotation from the first intermediate gear of reducer downstream the flow. Invention protects values of ratios of reducer master gear toothing width to width of slave gear toothing located on the shaft of the first impeller of birotatory fan, number of intermediate gear teeth engaged with gear of internal coupling of simple coaxial reducer, to number of teeth of internal engagement gear of simple coaxial reducer, number of slave gear teeth located on the shaft of the first impeller of birotatory fan to number of teeth of intermediate gear engaged with gear of simple coaxial reducer.

EFFECT: lower noise level due to arrangement of fan with working vanes fixed relative to disk, higher reliability due to design simplification, lower number of parts and reduced weight.

2 dwg