公开(公告)号：US20200182150A1

公开(公告)日：2020-06-11

申请号：US16687727

申请日：2019-11-19

Applicant: ROLLS-ROYCE plc

Inventor： Geraint REES

IPC: F02C7/06 ,  F02K3/06 ,  F02C7/36 ,  F01D25/20

Abstract: A gas turbine engine comprising a gearbox that receives an input from a core shaft and outputs drive to the fan to drive the fan at a lower rotational speed than the core shaft. The gearbox is an epicyclic gearbox comprising planet gears, each of which is rotatable about its own axis on a respective pin with a journal bearing formed between each planet gear and its respective pin. A first oil supply system is arranged to provide an oil supply to the journal bearing via a first journal bearing supply channel formed through the pin. A second oil supply system is arranged to provide an oil supply to the journal bearing via a second journal bearing supply channel formed through the pin, the second oil system being different to the first oil system. The second journal bearing supply channel is parallel to the first journal bearing supply channel.