| 摘要 |
<p>A non-contacting spiral groove face seal for shafts rotating at high pressures and speeds with a combination of two groove patterns (22, 24) on one of the two sealing faces (19, 21) of mating sealing rings (18, 20); one pattern relatively deep (22), the other relatively shallow (24). The relatively deep spiral-shaped groove pattern is optimized for hydrodynamic operation and on shaft rotation pumps the sealed fluid in-between sealing faces to set a running clearance. The relatively shallow pattern is designed to prevent frictional lock of the sealing faces hydrostatically at starts and stops of shaft rotation by admitting controlled amounts of the sealed fluid between sealing faces when the shaft is at or near to a stationary condition.</p> |
