| 摘要 |
A gas turbine generally comprises a compressor, a combustor and a turbine body operatively connected to the compressor through a rotation shaft, and the turbine body is composed of a plurality of rotors formed with turbine discs and movable blades which are arranged in plural stages along an axial direction of the turbine body, in which a rear shaft is connected to a downstream side of a final stage disc of the turbine discs so as to extend rearward from the final stage turbine disc and supported by means of a bearing. The rear shaft is formed with a cooling medium supply passage for supplying a cooling medium to the turbine disc and a cooling medium recovery passage for recovering the cooling medium from the turbine disc, and a further cooling medium passage is formed between the rear shaft and either one of the cooling medium supply passage and the cooling medium recovery passage.
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