Steady-State Analysis of Mechanical Seals With Two Flexibly Mounted Rotors

[+] Author and Article Information
J. Wileman

Laboratoire de Mécanique des Solides, URA CNRS Université de Poitiers, Poitiers, France

I. Green

The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332

J. Tribol 119(1), 200-204 (Jan 01, 1997) (5 pages) doi:10.1115/1.2832460 History: Received February 19, 1996; Revised June 03, 1996; Online January 24, 2008


The dynamic behavior of a mechanical face seal with two flexibly mounted rotors is investigated. The equations of motion are derived using linearized rotor dynamic coefficients to model the dynamic behavior of the fluid film. The equations are shown to be linear in the inertial reference with harmonic forcing functions which result from the initial misalignment of the flexible supports. A method for obtaining the steady-state response in the system is derived by transforming the equations of motion into reference frames which rotate with the shafts. The resulting equations contain constant forcing functions and can be readily solved for the magnitude of the steady-state response. The method presented allows a rapid determination of the steady-state misalignment of a seal without resorting to numerical modeling.

Copyright © 1997 by The American Society of Mechanical Engineers
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