Power stage of a gas turbine

Claim 1

A gas turbine having a body (1) and a power stage (5) therein including a stator (4) and a rotor (9) with a plurality of blade-carrier disks, comprising: a hollow power shaft (10) of the power stage (5) which support the disks in a cantilever fashion, and wherein said shaft (10) includes a pair of frustoconical hollow forged ends (11, 12) made of case-hardened and milled steel on their surfaces and connected together by a hollow central tube (13), wherein one frustoconical end (11) is inserted into a corresponding axial space (14) of the rotor (9) and wherein the other frustoconical end (12) is supported by the body (10), a stud (15) extending through said hollow tube (13) and from said frustoconical ends (11, 12) having threaded ends (15', 15"), wherein one end (15') is releasably threaded into a correspondingly threaded portion (16) about the axial space (14) of the rotor (9) and wherein the other end (15") is threaded into a nut (17) which cooperates with the other frustoconical end (15') to tighten and place said stud (15) under tension, bearing means (19, 20, 20') within the body 1 which support said hollow shaft (10) at said case-hardened and milled frustoconical ends (11, 12), gear means (22, 23, 24) which are connected to said shaft (10) for taking the drive therefrom, and cam means (26) on the body 1 which engage and support the rotor (9) in its correct central position as said stud (15) is released from the threaded portion (16) in the axial hollow space (14).