Zwischenwellendichtung

Details

Veröffentlichungs-Nr.

EP2698567

Aktenzeichen

EP13179252

Anmeldetag

5. August 2013

Veröffentlichung

3. Juni 2015

Erteilung

3. Juni 2015

Rechtsraum

EP

IPC

F16J15/34

Abstract

An intershaft seal is provided for inner 57 and outer coaxial shafts 58 which rotate relative to each other. The seal is located in an annular space between the shafts and maintains an axial fluid pressure differential between a first side 51 of the seal and a second side 52 of the seal. The seal includes a first runner 53 which extends circumferentially around a first one of the shafts and projects therefrom into the annular space. The seal further includes a sealing ring which is coaxial with the shafts and has a first end face 66, the first runner 53 forming a sealing interface with the first end face 66 of the sealing ring. The sealing ring has a main body portion 55 formed of a first material having a first stiffness, and further has a retaining ring 70 fitted to the radially outward side of the body portion 55 and formed of a second material having a second stiffness. The second stiffness is greater than the first stiffness such that the retaining ring 70 reduces or prevents radial growth of the sealing ring relative to the outer shaft 58 under centrifugal loading. Instead of the stiffness of the material, the thermal expansion coefficient of the material can also be used.

Anmelder

Firma

Rolls-Royce plc

Land

🇬🇧 Großbritannien

Fachgebiete