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US 6,227,799 B1 9 10 high-pressure moving blades and intermediate-pressure moving blades having a steam-in?oW region of a combined high-pressure/intermediate-pressure steam turbine, said at least one out?ow line leading out to the steam-in?oW region of the intermediate-pressure moving blades. 7. The turbine shaft according to claim 1, Wherein said second blading region is of double-?oW construction. 8. The turbine shaft according to claim 6, Wherein said secondbladingregionisofsingle-?oWconstruction. 16. The turbine shaft according to claim 1, Wherein said at least one out?oW line is a radial bore. 17. The turbine shaft according to claim 9, Wherein said ?rst blading region has recesses formed therein for accom modating turbine moving blades, and said at least one in?oW line leading out betWeen tWo of said recesses being axially spaced-apart recesses. 18. The turbine shaft according to claim 1, Wherein said second blading region has recesses formed therein for 9.Theturbineshaftaccordingtoclaim1,Whereinsaidat10 accommodatingturbinemovingblades,saidatleastone out?oW line leading out to one of said recesses. 19. The turbine shaft according to claim 1, Wherein said second blading region has recesses formed therein for accommodatingturbinemovingbladeshavingbladecooling leastonein?oWlineleadsoutintosaidsteam-discharge 15 lines,saidatleastoneout?oWlineleadingouttotheblade least one in?oW line extends from said circumferential surface to said cooling line. 10. The turbine shaft according to claim 9, Wherein said ?rst blading region has a steam discharge region and said at region. 11. The turbine shaft according to claim 1, Wherein said coolinglineisacentralboredisposedsubstantiallyparallel to the rotation axis. 12. The turbine shaft according to claim 1, Wherein said at least one in?oW line is a radial bore. 13. The turbine shaft according to claim 1, Wherein said second blading region has recesses formed therein for accommodating turbine moving blades, said at least one out?oW line leading out to said circumferential surface 25 betWeen tWo of said recesses being axially spaced-apart recesses. 14. The turbine shaft according to claim 13, Wherein said second blading region has a branch line formed therein, said branch line extending from said one of said recesses to said circumferential surface. 15. The turbine shaft according to claim 3, Wherein said cavity is an annular gap. cooling line of one of the turbine moving blades. 20.A methodofcoolingaturbineshaftinasteamturbine, the turbine shaft carrying high-pressure moving blades of a high-pressure turbine section in a ?rst blading region and intermediate-pressure moving blades of an intermediate pressure turbine section in a double-?oW second blading region, the second blading region having recesses formed therein for accommodating turbine moving blades, the method Which comprises: passing steam from a steam region of the ?rst blading region through an interior of the turbine shaft over a bearing region to the second blading region; and discharging steam through an out?oW line leading out to a circumferential surface of the turbine shaft betWeen tWo of the recesses that are axially spaced-apart recesses.PDF Image | TURBINE SHAFT OF A STEAMTURBINE HAVING INTERNAL COOLING
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