The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 2020
Filed:
Mar. 15, 2019
Rolls-royce Deutschland Ltd & CO KG, Blankenfelde-Mahlow, DE;
Christos Kallianteris, Berlin, DE;
Andreas Becker, Berlin, DE;
Rolls-Royce Deutschland Ltd & Co KG, Blankenfelde-Mahlow, DE;
Abstract
A geared turbofan engine that has a planetary gearbox which couples a fan shaft and a turbine shaft to each other. The planetary gearbox includes a sun gear that is driven by the turbine shaft. The turbine shaft and the sun gear form a spline shaft connection that is lubricated with oil. Sealing means are provided, sealing off the oil in the toothing area of the spline shaft connection. The sealing means have an elastic sealing ring that has a variable diameter and is springing outwards, and that is arranged inside a groove extending in the circumferential direction of the turbine shaft, wherein the sealing ring abuts at an inner circumferential surface of the sun gear with its radially outer circumferential surface. In further aspects, the invention relates to a method for mounting a planetary gearbox on a turbine shaft and to a spline arrangement.