Patent ID: 7534087

Claim:
A turbo-machine, comprising: a rotor rotatably mounted in a casing of the turbo-machine, the rotor comprising a rotor shaft and a plurality of moving-blade wheels arranged on the rotor shaft, wherein the plurality of moving-blade wheels comprise a plurality of moving blades arranged thereon; a feed passage arranged in the rotor for providing a fluid; and a plurality of discharge passages arranged in the rotor for discharging the fluid; and an actuating arrangement for influencing a flow of the fluid, the actuating arrangement in fluid connection with the plurality of discharge passages via gaps formed between the plurality of moving-blade wheels and elements projecting axially through the rotor shaft of the rotor; wherein the plurality of discharge passages open into a flow passage between the plurality of moving-blade wheels arranged on the rotor shaft to discharge the fluid from the rotor; wherein each of the plurality of discharge passages includes a throttle element for controlling an amount of fluid distributed into a respective one of the plurality of discharge passages; wherein a feeding opening of the feed passage is radially further on the inside than an outlet opening of the discharge passage; and wherein at least a portion of the plurality of throttle elements are configured to provide a decreased amount of fluid into a respective one of the plurality of discharge passages with increased axial distance from the actuating arrangement relative to an upstream throttle element.