Patent · US Active

Rotor blade with blade root contour having a straight portion provided in a concave contour portion

US11753950B2 · kind B2 · utility

1Cited by

3References

15Claims

0Family size

Assignee

MTU Aero Engines AG · DE

Inventors

Martin Pernleitner · Dachau, DE
Dieter Freno · Munich, DE
Klaus Wittig · Bobingen, DE
Christian Eichler · Munich, DE
Lutz Friedrich · Berlin, DE
Johannes Linhard · Andechs, DE

Key dates

Filing date	May 18, 2020
Grant date	Sep 12, 2023
Priority date	—
Expiry date	May 18, 2040

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T50/60
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A gas turbine has a rotor blade. The rotor blade has a blade root connected to an airfoil. The blade root has a root contour with respect to a cross-sectional view. From a lower end of the blade root, the blade root contour has convex contour portions and concave contour portions. From the lower end along the blade root contour between a convex contour portion and an adjoining concave contour portion, there is a contour portion as a flank portion that is load-bearing. From the lower end along the blade root contour between a concave contour portion and an adjoining convex contour portion, there is a contour portion as a flank portion that is not load-bearing in operation. At least one of the concave contour portions has a first arc portion, a second arc portion, and a straight portion disposed between the two arc portions.

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