Feedback-controlled friction or damping suppresses vibrations. Variable-friction secondary seal conceived to control vibration and stability of primary seal ring over wide range of conditions. By varying friction force or damping applied to primary seal ring, vibration controlled to provide stable operation. Advantages of "variablefriction secondary seal": face-seal stability controlled as function of primary-ring vibration amplitudes, and also friction remotely changed to achieve acceptable vibration amplitudes for large range of seal-operating conditions without compromising secondary-seal performance. Concept also useful in seal testing in which dynamic stability of face seals is under evaluation.
Variable-Friction Secondary Face Seals
NASA Tech Briefs ; 10 , 3
1986-05-01
Sonstige
Keine Angabe
Englisch
Hydrodynamic lubrication of face seals
NTRS | 1977
|Dynamic Analysis of Contact Face Seals
SAE Technical Papers | 1986
|Phase changes in liquid face seals
NTRS | 1980
|Design considerations for mechanical face seals
NTRS | 1980
|