Title:
【発明の名称】蒸気シール排気装置
Document Type and Number:
Japanese Patent JPH11507427
Kind Code:
A
Abstract:
A turbine air sealing and condenser air removal system for use in steam plant equipment is arranged to increase steam plant efficiency, reduce oxygen concentration in condensate being returned to the steam generators, and simplify system arrangement and maintenance. This system incorporates dry running shaft seals at the high and low pressure turbine shaft glands. The turbine shaft glands are exhausted to a vacuum header which is exhausted by vacuum pumps. Air from the condenser is also exhausted to the common vacuum header. Non-rotating air seals on the turbine such as valve stem seals, which must only accommodate linear movement, can incorporate metallic bellows or conventional packings to prevent air leakage into the steam path or steam leakage out into the surrounding environment. The bellows seals may also incorporate stem glands which are exhausted to the turbine exhaust trunk to minimize the internal pressure of the bellows and prevent catastrophic failure which might occur if the bellows were to be pressurized with high pressure steam.
Inventors:
Smith, James S
Revasseau, Glenn
John H. Chapman
Link, daniel jay
Kevin M, Daydona
Revasseau, Glenn
John H. Chapman
Link, daniel jay
Kevin M, Daydona
Application Number:
JP50231597A
Publication Date:
June 29, 1999
Filing Date:
June 04, 1996
Export Citation:
Assignee:
Electric Boat Corporation
International Classes:
F01D11/00; F01D11/02; F01D11/04; F01D11/06; F28B9/10; (IPC1-7): F01D11/00; F01D11/04
Attorney, Agent or Firm:
Seiji Yanagida (1 person outside)