| 摘要 |
PROBLEM TO BE SOLVED: To enable a requisite and sufficient amount of oil required for a plurality of bearings for supporting a low pressure type shaft and a high pressure type shaft of a gas turbine engine.SOLUTION: When a requisite oil lower limit amount for a first bearing 14 near an oil supply source 55 is defined as A, a requisite oil lower limit amount and a safe surplus oil amount for a second bearing 18 far from the oil supply source 55 are defined as B and C respectively, an oil amount corresponding to A+B+C is supplied from the oil supply source 55 and a hole diameter of a first oil hole i and the number of holes are set to cause the oil amount supplied to the first bearing 14 to become the requisite oil lower limit amount A, so that not only oil of the requisite oil lower limit amount A can be supplied accurately to the first bearing 14, but also oil of an amount obtained by adding the requisite oil lower limit amount B with the safe surplus oil amount C is supplied to the second bearing 18 to enable oil of the requisite oil lower limit amount B to be supplied accurately to the second bearing 18 for which the oil amount is apt to be lack due to its arrangement far from the oil supply source 55. |
