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Planetary backup bearings for high speed applications and service life estimation Methodology

Quurck, Lukas and Schüßler, Benedikt and Franz, Daniel and Rinderknecht, Stephan (2016):
Planetary backup bearings for high speed applications and service life estimation Methodology.
In: ISMB15 - The 15th International Symposium on Magnetic Bearings, Kitakyushu, Japan, 3.-6. August 2016, [Online-Edition: http://www.magneticbearings.org/publications/],
[Conference or Workshop Item]

Abstract

Abstract: Backup bearings (BB) limit the rotor translational movement during malfunction, overload or power loss in the active magnetic bearings (AMB) in order to enable safe spin down and reduce secondary damage. Especially for high speed applications like flywheels with high rotor inertia, the requirements towards the load capacity and service life of the BB is comparably high. For a special type of flywheel with exceptionally high speeds in the BB interface, a planetary BB system is presented. The planetary BB consists of multiple bearing units placed circumferentially around the stator. Its elastic properties are described as well as a contact damping approach. For cost efficient BB investigation, a scaled test rig is introduced and a parametric study of different delivitations simulations is done. Several quantification methods to evaluate severity, bearing loads and lifetime utilization during BB are presented and applied to the simulations. The applicability of the planetary BB to vertical high speed rotors is confirmed by the simulation data and bearing element selection is affirmed. The results of the quantification methodologies show specific correlation to initial conditions and parameters like unbalance and in particular contact friction coefficient.

Item Type: Conference or Workshop Item
Erschienen: 2016
Creators: Quurck, Lukas and Schüßler, Benedikt and Franz, Daniel and Rinderknecht, Stephan
Title: Planetary backup bearings for high speed applications and service life estimation Methodology
Language: English
Abstract:

Abstract: Backup bearings (BB) limit the rotor translational movement during malfunction, overload or power loss in the active magnetic bearings (AMB) in order to enable safe spin down and reduce secondary damage. Especially for high speed applications like flywheels with high rotor inertia, the requirements towards the load capacity and service life of the BB is comparably high. For a special type of flywheel with exceptionally high speeds in the BB interface, a planetary BB system is presented. The planetary BB consists of multiple bearing units placed circumferentially around the stator. Its elastic properties are described as well as a contact damping approach. For cost efficient BB investigation, a scaled test rig is introduced and a parametric study of different delivitations simulations is done. Several quantification methods to evaluate severity, bearing loads and lifetime utilization during BB are presented and applied to the simulations. The applicability of the planetary BB to vertical high speed rotors is confirmed by the simulation data and bearing element selection is affirmed. The results of the quantification methodologies show specific correlation to initial conditions and parameters like unbalance and in particular contact friction coefficient.

Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Mechatronic Systems in Mechanical Engineering (IMS)
Event Title: ISMB15 - The 15th International Symposium on Magnetic Bearings
Event Location: Kitakyushu, Japan
Event Dates: 3.-6. August 2016
Date Deposited: 07 Sep 2017 06:06
Official URL: http://www.magneticbearings.org/publications/
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