| 摘要 |
A seal system for sealing a housing (12) and rotatable shaft (16) against leakage of a gas under high pressure; hydrogen is an example. The system, using multiple seals in tandem, provides a stepped reduction of high pressure gas at full height pressure to a low pressure across the individual seal modules. The seal system has plural, axially spaced spiral-grooved end face seal modules (20, 22, 24) mounted between the shaft (16) and housing (12), the axial spaces between the seals defining a chamber (12, 21, 23). Each seal module (20, 22, 24) has a primary seal ring (26a, 26b, (26c) affixed to the housing (12) and a mating ring (30a, 30b, 30c) affixed for rotation with the shaft (16), the two rings (26, 30) having opposed, radially extending faces (32, 28); each mating ring (30) has a plurality of radial spiral grooves (92) extending radially inward from the outer diameter or circumference. |
