Condensing turbine having at least two seals for sealing off the

Rotary kinetic fluid motors or pumps – With shaft connected fluid force subjected thrust balancing... – In separate chamber having non-system fluid inlet

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415106, 415107, 415112, 415113, 415 26, 415 47, 415118, 415231, F01D 302, F01D 304

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active

055778852

ABSTRACT:
A condensing turbine includes a live-steam inlet, an exhaust-steam outlet and at least two seals for sealing off a turbine casing in the region of a turbine shaft carrying a turbine rotor. At least one of the seals is disposed on the live-steam side and one of the seals is disposed on the exhaust-steam side. The overall construction is substantially simplified by constructing at least one respective seal as a gas-lubricated mechanical surface seal on both the live-steam side and the exhaust-steam side. The outermost mechanical surface seals in each case on the live-steam side and the exhaust-steam side seal off separate seal spaces which are acted upon through a balancing line by an identical vacuum lying below the outer atmospheric pressure. These mechanical surface seals are constructed and fitted in such a way that a flow which is necessary for gas lubrication can occur through the mechanical surface seals from the outer atmosphere into the interior of the casing.

REFERENCES:
patent: 3392983 (1968-07-01), Hajner
patent: 4557664 (1985-12-01), Tuttle et al.
patent: 4993917 (1991-02-01), Kulle et al.
patent: 5375853 (1994-12-01), Wasser et al.

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