Trap seal for open circuit liquid cooled turbines

Details Trap seal for open circuit liquid cooled turbines Trap seal for open circuit liquid cooled turbines

1979-06-01

1980-12-30

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With fluid passage in working member communicating with...

Discharge solely at periphery normal to rotation axis

416 96R, F01D 518

Patent

active

042420458

ABSTRACT:
An improved trap seal for open circuit liquid cooled turbines is disclosed. The trap seal of the present invention includes an annular recess formed in the supply conduit of cooling channels formed in the airfoil of the turbine buckets. A cylindrical insert is located in the annular recesses and has a plurality of axial grooves formed along the outer periphery thereof and a central recess formed in one end thereof. The axial grooves and central recess formed in the cylindrical insert cooperate with the annular recess to define a plurality of S-shaped trap seals which permit the passage of liquid coolant but prohibit passage of gaseous coolant.

REFERENCES:
patent: 3804551 (1974-04-01), Moore
patent: 3844679 (1974-10-01), Grondahl et al.
patent: 3856433 (1974-12-01), Grondahl et al.
patent: 4111604 (1978-09-01), Kydd
patent: 4184797 (1980-01-01), Anderson et al.

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