Sealing apparatus at the blade shaft of a rotor stage of an axial turbomachine

US8870542B2 · kind B2 · utility

Assignee

• MTU Aero Engines AG · DE

Inventors

• Manfred Feldmann · Eichenau, DE
• Markus Uecker · Munich, DE
• Benedikt Heidenreich · Munich, DE
• Dieter Freno · Munich, DE

Key dates

• Filing date: Feb 2, 2010
• Grant date: Oct 28, 2014
• Expiry date: Jun 28, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2260/941
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A turbomachine is disclosed. The turbomachine includes a rotor, a plurality of blades arranged side by side on the rotor in a circumferential direction, and a plurality of sealing apparatuses each disposed on a respective blade shaft of the plurality of blades. Each of the plurality of sealing apparatuses includes first and second bottom plates protruding in a respective axial direction on the respective blade shaft and first and second bulkheads which extend in a radial direction along the respective blade shaft and form a double-walled seal in the axial direction. A respective rounded or parabolic transitional cross-section from the bottom plates to the bulkheads is provided and at least one of the bulkheads is offset with respect to a blade root edge of the respective blade shaft in a direction toward a radial longitudinal axis of the respective blade shaft.