An experimental and theoretical approach of a pinned and a conventional ball bearing for active magnetic bearings

Cesar Augusto Fonseca, Ilmar Santos, Hans I. Weber

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The magnetic bearing rotors are present nowadays in many industrial applications. However, a damage or a malfunctioning of the magnetic bearing can produce a dangerous high lateral vibration.Backup bearings hold them to protect the machine integrity. The present study investigates the effectiveness of a pinned bearing on a horizontal rotor compared with a conventional rolling bearing. Experimental tests have been conducted; a mathematical model to describe the motion is then developed and validated numerically. It is shown that both the simulation and the test rig are in good agreement with each other and that the pinned bearing is able to reduce the interval of impacting velocities. The experimental set up is able to gather data fast enough to observe the dynamics and the forces acting on the structure. The orbits and the magnitudes of the impact forces are the key elements to assess the validity of the pinned in contrast to the rolling one as a relevant type of backup bearing.
Original languageEnglish
Article number106541
JournalMechanical Systems and Signal Processing
Volume138
ISSN0888-3270
DOIs
Publication statusPublished - 2020

Keywords

  • Safety bearings
  • Impact
  • Friction
  • Nonlinear dynamics
  • Magnetic bearing

Cite this

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title = "An experimental and theoretical approach of a pinned and a conventional ball bearing for active magnetic bearings",
abstract = "The magnetic bearing rotors are present nowadays in many industrial applications. However, a damage or a malfunctioning of the magnetic bearing can produce a dangerous high lateral vibration.Backup bearings hold them to protect the machine integrity. The present study investigates the effectiveness of a pinned bearing on a horizontal rotor compared with a conventional rolling bearing. Experimental tests have been conducted; a mathematical model to describe the motion is then developed and validated numerically. It is shown that both the simulation and the test rig are in good agreement with each other and that the pinned bearing is able to reduce the interval of impacting velocities. The experimental set up is able to gather data fast enough to observe the dynamics and the forces acting on the structure. The orbits and the magnitudes of the impact forces are the key elements to assess the validity of the pinned in contrast to the rolling one as a relevant type of backup bearing.",
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An experimental and theoretical approach of a pinned and a conventional ball bearing for active magnetic bearings. / Fonseca, Cesar Augusto; Santos, Ilmar; Weber, Hans I.

In: Mechanical Systems and Signal Processing, Vol. 138, 106541, 2020.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - An experimental and theoretical approach of a pinned and a conventional ball bearing for active magnetic bearings

AU - Fonseca, Cesar Augusto

AU - Santos, Ilmar

AU - Weber, Hans I.

PY - 2020

Y1 - 2020

N2 - The magnetic bearing rotors are present nowadays in many industrial applications. However, a damage or a malfunctioning of the magnetic bearing can produce a dangerous high lateral vibration.Backup bearings hold them to protect the machine integrity. The present study investigates the effectiveness of a pinned bearing on a horizontal rotor compared with a conventional rolling bearing. Experimental tests have been conducted; a mathematical model to describe the motion is then developed and validated numerically. It is shown that both the simulation and the test rig are in good agreement with each other and that the pinned bearing is able to reduce the interval of impacting velocities. The experimental set up is able to gather data fast enough to observe the dynamics and the forces acting on the structure. The orbits and the magnitudes of the impact forces are the key elements to assess the validity of the pinned in contrast to the rolling one as a relevant type of backup bearing.

AB - The magnetic bearing rotors are present nowadays in many industrial applications. However, a damage or a malfunctioning of the magnetic bearing can produce a dangerous high lateral vibration.Backup bearings hold them to protect the machine integrity. The present study investigates the effectiveness of a pinned bearing on a horizontal rotor compared with a conventional rolling bearing. Experimental tests have been conducted; a mathematical model to describe the motion is then developed and validated numerically. It is shown that both the simulation and the test rig are in good agreement with each other and that the pinned bearing is able to reduce the interval of impacting velocities. The experimental set up is able to gather data fast enough to observe the dynamics and the forces acting on the structure. The orbits and the magnitudes of the impact forces are the key elements to assess the validity of the pinned in contrast to the rolling one as a relevant type of backup bearing.

KW - Safety bearings

KW - Impact

KW - Friction

KW - Nonlinear dynamics

KW - Magnetic bearing

U2 - 10.1016/j.ymssp.2019.106541

DO - 10.1016/j.ymssp.2019.106541

M3 - Journal article

VL - 138

JO - Mechanical Systems and Signal Processing

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SN - 0888-3270

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