Light weight shroud fin for a rotor blade

摘要

A turbine blade is provided and includes a tip end carrying a shroud and at least one fin, which extends radially away from the shroud. The fin includes a first sidewall and a second sidewall, which are spaced apart, arranged parallel to each other, and are connected to the shroud, and a cutting edge, which is connected to the first and second sidewalls. The cutting edge thereby creates a hollow space between the sidewalls, the shroud, and the cutting edge, and further extends radially away from the first and second sidewalls. Also provided is a method of manufacturing the blade by casting the blade as single piece with the hollow fin or by forging the blade; and machining the fin to create the first and second sidewalls and cutting edge thereby opening the hollow space between said sidewalls and the cutting edge.

主权项

1. A turbine blade comprising a tip end carrying a shroud and at least one fin, which extends radially away from the shroud, the fin comprises a first sidewall and a second sidewall, which are spaced apart from each other, and are connected to the shroud, and a cutting edge, which is connected to the first and second sidewalls, said cutting edge thereby creating a hollow space between the sidewalls, the shroud, and the cutting edge, and further extends radially away from the first and second sidewalls;
wherein the wall thickness of the first and second sidewalls are constant in a radial direction for at least 50% of the sidewall height.