Turbine exhaust crack mitigation using partial collars

US11248478B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Shashikant Maurya · Nagothane, IN
• John Giaimo · North Palm Beach, US
• Ryan David Wiebe · North Palm Beach, US
• Keith L. Nickols · Orlando, US
• Andre Correa · Campinas, BR

Key dates

• Filing date: Jun 7, 2019
• Grant date: Feb 15, 2022
• Expiry date: Jun 7, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2240/14
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An exhaust apparatus for a gas turbine includes an annular duct with struts extending from an outer duct-wall to an inner duct-wall of the annular duct. Each strut is encapsulated in a respective strut shield. An interface of the strut shield with a respective duct-wall includes a collar extending along a partial length of the perimeter of the strut shield at the respective interface. The collar includes a first section extending radially and aligned with the strut shield, and a second section oriented at an angle to the first section and aligned with the respective duct-wall. The first section is attached to the strut shield along a first joint and the second section is attached to the respective duct-wall along a second joint. An intersection of the first and second sections is formed by a smooth curve defined by a radius configured to distribute stresses at the respective interface.