Frontiers of Mechanical Engineering >

2009 , Vol. 4 >Issue 3: 305 - 309

DOI: https://doi.org/10.1007/s11465-009-0036-7

RESEARCH ARTICLE

Vibratory behaviors of Jeffcott system on cylindrical roller bearings

  • Hao WU ,
  • Jianwen WANG ,
  • Qi AN
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  • School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

Received date: 06 Oct 2008

Accepted date: 10 Dec 2008

Published date: 05 Sep 2009

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg
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Abstract

A Jeffcott rotor system of 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 oil 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.

Key words： roller bearing; bearing-rotor system; design value; critical rotational speed

Cite this article

Hao WU , Jianwen WANG , Qi AN . Vibratory behaviors of Jeffcott system on cylindrical roller bearings[J]. Frontiers of Mechanical Engineering, 2009 , 4(3) : 305 -309 . DOI: 10.1007/s11465-009-0036-7

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