Invention Grant
- Patent Title: Method of increasing service interval periods in a steam turbine
- Patent Title (中): 在蒸汽轮机中增加服务间隔时间的方法
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Application No.: US12055490Application Date: 2008-03-26
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Publication No.: US07954323B2Publication Date: 2011-06-07
- Inventor: James C. Bellows , Sudhir Rajagopalan , James W. Dorow
- Applicant: James C. Bellows , Sudhir Rajagopalan , James W. Dorow
- Applicant Address: US FL Orlando
- Assignee: Siemens Energy, Inc.
- Current Assignee: Siemens Energy, Inc.
- Current Assignee Address: US FL Orlando
- Main IPC: F01K23/06
- IPC: F01K23/06 ; E01B9/10 ; F16B35/00 ; F16B43/00
Abstract:
A method of increasing service interval periods in a steam turbine by neutralizing sodium hydroxide in contaminated steam in a high temperature and a high pressure portion of a steam turbine by placing a protective covering over at least a portion of each of the bolts of a nozzle block assembly. The protective covering neutralizes contaminants in contaminated steam to reduce stress cracking of the bolts during steam turbine operation, and thus extend the useful life of the bolts and reduce the need for service work to repair or replace damaged bolts.
Public/Granted literature
- US20090241544A1 Method of Increasing Service Interval Periods in a Steam Turbine Public/Granted day:2009-10-01
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