Method of modifying a steam turbine
Patent 5494405 Issued on February 27, 1996. Estimated Expiration Date: 
March 20, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 20, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3058720 3594094 3690786 3697191 Outer cylinder for a low pressure turbine apparatus Internal moisture removal scheme for low pressure axial flow steam turbine Low pressure steam turbine construction Exhaust device for a condensable-fluid axial-flow turbine Turbine exhaust hood Exhaust pipe of turbine InventorsAssigneeApplicationNo. 407204 filed on 03/20/1995US Classes:415/211.2, Downstream of runner415/215.1Casing having multiple parts welded, cemented, or fusedExaminersPrimary: Look, Edward K.Assistant: Larson, James A. Attorney, Agent or FirmForeign Patent References
International ClassF01D 025/24AbstractA steam turbine having improved stationary parts in which a moisture removal slot is formed in a blade ring cylinder immediately upstream of the last row of rotating blades. The slot has a reduced width inlet throat portion and an enlarged manifold portion. The manifold portion of the slot distributes the moisture collected to a plurality of radially oriented discharge holes formed in the blade ring. The inlet throat serves to insolate the manifold from the swirling steam flowing through the turbine, thereby preventing entrainment of the moisture droplets into the steam flow. The blade ring encircles the tips of the last row of rotating blades and the outer flow guide is integrally formed on the blade ring. The steam turbine also has a new inner flow guide that matches a new last row of rotating blades. The new inner flow guide is attached to the existing inner flow guide by welds.Field of SearchVane or deflectorDownstream of runner Casing having multiple parts welded, cemented, or fused Casing with axial flow runner INTERCHANGEABLE PARTS TO VARY PUMPING CAPACITY OR SIZE OF PUMP Impeller making Repairing or disassembling Turbomachine making Assembling fluid flow directing devices, e.g., stators, diaphragms, nozzles | |
