| 摘要 |
PROBLEM TO BE SOLVED: To enable inner/outer races to always hold an engaging state with rolling bodies with simple constitution by concentrically fixing a low density high circumferential strength support ring to the inner race fixed to a second annular member and a first annular member arranged on the outside. SOLUTION: A roller bearing 30 having plural rolling bodies 32 is arranged in an operable state between an outer race 34 and an inner race 36 between a high pressure turbine rotor 10 and a low pressure turbine rotor 23. The outer race 34 is fixed to the annular extension part 39 in the rear of a high pressure turbine disk 21 on the inside surface 40 of the rotor 10. The inner race 36 is fixed to the outside surface 42 of a low pressure shaft 28. A high pressure shaft rotates at a higher speed than the low pressure shaft 28, and due to a centrifugal load, the outer race 34 can cause looseness of a bearing 30 by trying to swell in the radial direction. Then, a lightweight or low density annular support ring 50 is arranged outside in the radial direction of the outer race 34. The support ring 50 is manufactured by a TMC material so as to endure hoop stress without swelling since it has titanium fiber 51 extending in the circumferential direction. |
