| 摘要 |
Two methods for the manufacture of a welded rotor of a fluid-flow machine are described, through which rotor a cooling medium flows through inflow and outflow passages inside the rotor and which is composed of a plurality of rotor disks, which are connected to one another by welds running radially or largely radially relative to the rotor axis and in each case enclose with one another a hollow passage, which runs around the rotor axis and interrupts the welds in such a way that a weld facing the rotor is directly adjacent to the hollow passage. The invention is distinguished by the fact that two rotor disks directly adjacent to one another are welded to one another along at least one weld, which extends in the direction of the rotor axis starting from the hollow passage, which is enclosed by both rotor disks, that that region of the hollow passage which faces away from the rotor is designed to be at least partly open at its peripheral outside, and that both rotor disks enclose a gap, which directly adjoins the hollow passage on the side facing away from the rotor and into which a ring element comprising at least two components is inserted, and that the components of the ring element are joined to one another at their opposite abutting surfaces and with their side flanks to the rotor disks opposite the latter. The other inventive method provides for the use of a one-piece ring which can also be welded using conventional welding techniques to close off the hollow passage.
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