A dynamic model of a contacting mechanical seal for down-hole tools, operating in the mixed lubrication regime, has been constructed. Two dynamic cases are examined: the behavior of the seal after it is subjected to a non-equilibrium initial condition and the behavior of the seal as it tracks axial runout of the rotating face. In both cases the seal experiences much larger leakage and inflow (incursion) rates than under steady-state conditions, although in the former case the duration of the increased rates is very short.
Issue Section:
Technical Papers
Keywords:
seals (stoppers),
mechanical contact,
machine tools,
lubrication,
tribology,
dynamic response,
performance evaluation
Topics:
Cavitation,
Dynamic models,
Equations of motion,
Equilibrium (Physics),
Film thickness,
Fluid pressure,
Fluids,
Inflow,
Leakage,
Lubrication,
Pressure,
Rotation,
Steady state,
Transients (Dynamics),
Damping,
Fluid mechanics,
Hydrostatics,
Rotors,
Dynamics (Mechanics),
Inertia (Mechanics),
Contact mechanics,
Angular momentum,
Tribology,
Dynamic response
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