Patent · US Active

Gas turbine blade shroud

US7628587B2 · kind B2 · utility

15Cited by

11References

20Claims

0Family size

Assignee

ALSTOM Technology Ltd · CH

Inventors

Jose Anguisola McFeat · Waldshut-Tiengen, DE
Ingolf Schulz · Baden, CH
Dirk Wilhelm · Zürich, CH

Key dates

Filing date	Oct 30, 2006
Grant date	Dec 8, 2009
Priority date	—
Expiry date	Mar 16, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF05D2250/141
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A gas turbine blade shroud includes a platform and one or more fins extending toward a stator and side rails that extend radially toward the stator and along the edge of the platform. The increased wall thickness in the side regions of the blade shroud effects an increase in stiffness and a decrease in deformation during turbine operation. Due to a localised increase in wall thickness the mass of the blade shroud can be minimized such that mechanical loading is not significantly increased. The side rails can improve a lining up of adjacent blades and decrease a probability of hot gas leakage into the cavity between blade shroud and stator. The side rails have profile shapes that can be optimised in view of stiffness and mechanical loading and are suitable for casting. The blade shroud with side rails can have an improved life time.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.