Rotor cooling for single and double axial flow turbines

Details Rotor cooling for single and double axial flow turbines Rotor cooling for single and double axial flow turbines

1977-06-14

1979-04-24

Croyle, Carlton R.

Rotary kinetic fluid motors or pumps

Including means for handling working fluid leakage

Leakage through seal between runner or shaft and static part

F01D 2500, F01D 1100

Patent

active

041509170

ABSTRACT:
Turbine structure having rotor cooling on the upstream side of the turbine's inlet or control stage with lower pressure turbine stages being situated axially downstream from the control stage. The normal axial direction of motive fluid flow is substantially the same through both the control stage and the lower pressure stages. Apertures in the control stage's rotatable disc portion of the rotor cause motive fluid which has been expanded through the control stage to be pumped into a cooling space formed between the rotor and a stationary nozzle structure which directs the motive fluid into the control stage. Motive fluid leakage between the nozzle structure and the control stage disc is minimized by a first set of seals disposed therebetween. Motive fluid leakage contact with the rotor is minimized by a second set of seals disposed between the control stage and nozzle structure with a conduit providing fluid communication for the leakage past the first seal to the exit from the control stage.

REFERENCES:
patent: 815973 (1906-03-01), McKee
patent: 3189320 (1965-06-01), Beldecos et al.
patent: 3206166 (1965-09-01), Beldecos et al.

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