Patent ID: 8251830
Filing Date: 2012-08-28
Classification: F01D,F05D,F16C,Y02T

Abstract:
1. An engine shaft, comprising: a load input element on a driving side; a load output element on a driven side, a fiber-composite plastic tube, interconnecting the load input element and the load output element, the fiber-composite plastic tube comprising fiber layers in an inner wall area oriented to take up and transmit torsional forces, and fiber layers in an adjoining outer wall area oriented to provide stiffness and natural frequency; wherein the engine shaft is a hollow body and the load input element is a gradually flaring tube section of the fiber-composite plastic tube and an attachment flange formed on the plastic tube made of at least one of a fiber-composite plastic material and a metallic driving protrusion inseparably connected to the fiber layers taking up the torsional forces, and the load output element is a metallic driven protrusion inseparably connected to the fiber layers; wherein the outer wall fiber layers are each disposed at an angle ranging between +5°/−5° and +12°/−12° inclusive essentially in a longitudinal direction of the shaft, while the inner wall fiber layers are each disposed at an angle ranging between +45°/−45° and +35°/−35° inclusive and are more transversely oriented to the longitudinal axis of the shaft; wherein the engine shaft is a gas turbine engine shaft.