Vibratory behaviors of Jeffcott system on cylindrical roller bearings |
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Authors: | Hao WU Jianwen WANG Qi AN |
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Affiliation: | (1) School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China |
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Abstract: | A Jeffcott rotor system on cylindrical roller bearings is studied in detail. Its critical speed is calculated by a new calculation
method with roller bearing stiffness and damping. The influences of bearing parameters, such as the roller length, rotor mass,
distance between the bearings and the kinematics viscosity of lubrication on the system critical speed are numerically studied,
and the influences of an oil film and damping on the critical speed are also studied. Regular curves of the relationship between
the geometric parameters and the system critical speed are obtained. The results show that with increasing roller length and
radial load, the critical speed increases; and with increasing rotor mass and the distance between the bearings and the kinematics
viscosity, the critical speed decreases. This means that an oil film will decrease the critical rotational speed of the rotor
system. |
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Keywords: | roller bearing bearing-rotor system design value critical rotational speed |
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