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Active Magnetic Bearnings In Aircraft Turbo-Machinery

Objective



Objectives and content
Active Magnetic Bearings (ABMs) offer the potential to
replace conventional bearings and oil lubrication systems
in aircraft engines, leading to reduced weight, reduced
fire hazard, more compact designs, increased power and
efficiency, and increased reliability and maintenance
intervals.
Medium-sized ABMs are already used in machine tools to
obtain high accuracy at high speed and the on-line
control of these devices is well developed. ABMs allow
higher bearing velocities than conventional oillubricated bearings, permitting higher rotational speeds
for large shafts.
However, current AMB designs operate at about the same
maximum temperature as oil bearings, about 150 C. They
do not have the ability to survive massive overloads,
such as are caused by heavy landings or blade-off
conditions in aero engines, or earthquakes in power
generation systems.
This basic research project investigates the proposals
for ABMs to be used in aero-engines in three areas:
dynamics of the rotor and bearings in extreme load
conditions.
elevated-temperature operation of the ABMs with a
target of 540 C.
alternative design concept studies to realise the full
potential of using advanced ABMs in aero-engines.
The project will focus on investigating materials and
designs to cope with these problems, and to develop
analytical tools to predict the performance. Two test
rigs will validate the prediction methods and demonstrate
the improvements achieved.
The advanced technology developed in this project will be
applicable to other gas-turbine designs and to a wide
range of high-technology machines such as pumps and
compressors, increasing their safety and efficiency.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

IMPERIAL COLLEGE OF SCIENCE, TECHNOLOGY AND MEDICINE
Address
Exhibition Road
SW7 2BX London
United Kingdom

Participants (6)

AE Energietechnik GmbH
Austria
Address
89,Siemensstrasse
1210 Wien
Eidgenössische Technische Hochschule - ETH Zürich
Switzerland
Address
101,Raemistrasse
8092 Zürich
MECOS TRAXLER AG
Switzerland
Address
36,Industriestrasse 26
8404 Winterthur
MTU Motoren- und Turbinen-Union München GmbH
Germany
Address
665,Dachauer Strasse
80995 München
TURBOMECA SA
France
Address
Avenue Du Président Szydlowski
64511 Bordes
UNIVERSITAET DARMSTADT/TU
Germany
Address
30,Petersenstrasse 30
64287 Darmstadt