GAS TURBINE ENGINE WITH TRANSMISSION

摘要

A gas turbine engine with a transmission having a variable ratio is discussed. A first gear train is in driving engagement with the low pressure spool and has a first output gear. A second gear train is in driving engagement with the high pressure spool and has a second output gear spaced apart from the first output gear. A third gear train defines a driving engagement between the low pressure spool and the low pressure compressor rotor with a variable transmission ratio. A fourth gear train is in driving engagement with the first and second output gears, and in driving engagement with the third gear train to determine the transmission ratio. A method of adjusting a speed of a low pressure compressor rotor of a gas turbine engine is also discussed.

主权项

1. A gas turbine engine comprising:
a core engine having a rotatable high pressure spool; a low pressure spool rotatable independently of the high pressure spool; a low pressure compressor rotor located upstream of the core engine; and a transmission having a variable transmission ratio and including:
a first gear train in driving engagement with the low pressure spool and having a first output gear,a second gear train in driving engagement with the high pressure spool and having a second output gear spaced apart from the first output gear,a third gear train defining a driving engagement between the low pressure spool and the low pressure compressor rotor, a ratio between rotational speeds of the low pressure spool and of the low pressure compressor rotor defining the variable transmission ratio, anda fourth gear train in driving engagement with the first and second output gears, the fourth gear train being in driving engagement with the third gear train and determining the transmission ratio.