The gas film stiffness and damping coefficients for a non-contacting gas face seal are obtained from the unsteady nonlinear Reynolds equation using the perturbation method. The seal assembly is converted to an equivalent spring-damper-mass system. The stator tracking motion is treated as a forced vibration caused by the rotor motion due to its runout and misalignment. The seal steady-state dynamic responses are solved semianalytically. Results for a typical spiral groove gas face seal agree well with that from a full numerical simulation. Stability of the seal axial pulsating and conical whirl are examined using the frequency dependent dynamic force and moment coefficients.
A Semi-Analytical Solution to the Dynamic Tracking of Non-contacting Gas Face Seals
Contributed by the Tribology Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for presentation at the STLE/ASME Tribology Conference, San Francisco, CA, October 22-24, 2001. Manuscript received by the Tribology Division January 17, 2001; revised manuscript received June 13, 2001. Associate Editor: J. A. Tichy.
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Ruan, B. (June 13, 2001). "A Semi-Analytical Solution to the Dynamic Tracking of Non-contacting Gas Face Seals ." ASME. J. Tribol. January 2002; 124(1): 196–202. https://doi.org/10.1115/1.1398292
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