Detailed ball bearing model for magnetic suspension auxiliary service Academic Article

abstract

• Catcher bearings (CBs) provide backup protection for rotating machines with active magnetic bearings (AMBs). The CBs are required in the event of an AMB failure or high transient loads. Numerical simulations of a rotor drop on CBs in flywheel energy storage system are conducted with a detailed CB model which includes a Hertzian load-deflection relationship between mechanical contacts, speed-and-preload-dependent bearing stiffness due to centrifugal force, and a Palmgren's drag friction torque. The transient simulation results show the rotor shaft response variations with the design parameters: shaft/bearing friction coefficients, axial preload, support damping of damper liner, and side loads from magnetic bearings. The results reveal that friction coefficients, support damping, and side loads are critical parameters to satisfy CB design objectives and prevent backward (super) whirl. 2003 Elsevier Science Ltd. All rights reserved.

authors

• Palazzolo, Alan

published proceedings

• JOURNAL OF SOUND AND VIBRATION

author list (cited authors)

• Sun, G., Palazzolo, A. B., Provenza, A., & Montague, G.

citation count

• 43

publication date

• January 2004

publisher

• Elsevier  Publisher

keywords

• 40 Engineering
• 4017 Mechanical Engineering
• 7 Affordable And Clean Energy

Digital Object Identifier (DOI)

• 10.1016/S0022-460X(03)00207-4

start page

• 933

end page

• 963

volume

• 269

issue

• 3-5

URL

• http://dx.doi.org/10.1016/s0022-460x(03)00207-4

user-defined tag

• 7 Affordable and Clean Energy