A novel semi-analytical formulation is presented for the linearized dynamic analysis of spiral-grooved mechanical gas face seals. The linearized rotordynamic properties of the gas film are numerically computed and then represented analytically by a constitutive model consisting of a cosine modified Prony series. The cosine modification enables the Prony series to characterize the gas film properties of face seals in applications with large compressibility numbers. The gas film correspondence principle is then employed to couple the constitutive model to the dynamics of the mechanical face seal. Closed-form solutions are presented for the transient natural response to initial velocity conditions, the steady-state response to rotor runout and initial stator misalignment, the transmissibility ratios, and the stability threshold. Results from the closed-form solutions are all within a few percent of the results from a full nonlinear numerical simulation.
Semi-Analytical Dynamic Analysis of Spiral-Grooved Mechanical Gas Face Seals
Contributed by the Tribology Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for presentation at the ASME/STLE Tribology Conference, Cancun, Mexico October 27–30, 2002. Manuscript received by the Tribology Division April 16, 2002; revised manuscript received July 25, 2002. Associated Editor: J. A. Tichy.
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Miller, B. A., and Green, I. (March 19, 2003). "Semi-Analytical Dynamic Analysis of Spiral-Grooved Mechanical Gas Face Seals ." ASME. J. Tribol. April 2003; 125(2): 403–413. https://doi.org/10.1115/1.1510876
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