Rotor drum for a turbomachine and compressor

Abstract

A rotor drum ( 100 ) for a turbomachine, the rotor drum ( 100 ) including portions of at least a first rotor main body ( 3 ) and a second rotor main body ( 5 ), and the second rotor main body ( 5 ) having at least one rotor arm ( 7 ) is provided. The rotor drum ( 100 ) has at least one opening ( 1 ) as a passage opening for allowing fluids to pass therethrough from an inner rotor space ( 22 ) to an outer rotor space ( 23 ), the opening ( 1 ) being disposed radially outwardly at the greatest radius ( 19 ) of an inner contour ( 21 ) of the rotor drum ( 100 ). A compressor is also provided.

What is claimed is: 
     
         1 . A rotor drum for a turbomachine, the rotor drum comprising:
 portions of at least a first rotor main body and a second rotor main body, the second rotor main body having at least one rotor arm, and   at least one opening as a passage opening for allowing fluids to pass therethrough from an inner rotor space to an outer rotor space, the opening being disposed radially outwardly at a greatest radius of an inner contour of the rotor drum.   
     
     
         2 . The rotor drum as recited in  claim 1  wherein the rotor arm includes the opening. 
     
     
         3 . The rotor drum as recited in  claim 1  wherein the rotor arm has at least one sealing tip to form a clearance seal with respect to a stator. 
     
     
         4 . The rotor drum as recited in  claim 3  wherein the opening is disposed between the at least one sealing tip and a radially inwardly oriented rotor disk of the second rotor main body. 
     
     
         5 . The rotor drum as recited in  claim 1  wherein a balancing ring is disposed radially outwardly on the rotor arm. 
     
     
         6 . The rotor drum as recited in  claim 5  wherein the balancing ring is disposed at the upstream or downstream end portion of the rotor arm of the second rotor main body. 
     
     
         7 . The rotor drum as recited in  claim 1  wherein the first and second rotor main bodies are prepared for receiving rotor blades to form a first and a second rotor stage. 
     
     
         8 . A compressor of a turbomachine, the compressor comprising at least one rotor drum as recited in  claim 1 . 
     
     
         9 . The compressor as recited in  claim 8  wherein the compressor is a high-pressure compressor of an aircraft engine.