Abstract: Labyrinth seal can cause steam-exciting, the structural and
operation parameters of labyrinth seal have effect on stability
of rotor-system. For investigating the coupling influences of the
structure and operating parameters of labyrinth seals on dynamic
coefficients, a model of calculating dynamic coefficients of
labyrinth seals is presented using a two control volume model.
The coupling influences of parameters on cross-coupled stiffness
and direct damping of labyrinth seal are discussed. In the
conclusion, a reference of preventing steam-exciting vibration
and optimum determination of design parameters of labyrinth
seals are provided.
Key words: Labyrinth
seal Cross coupled stiffness Direct damping Steam exciting
vibration
*
This project
is supported by National Natural Science Foundation of China. Manuscript received on
November 30, 1999; revised manuscript March 13, 2000
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