F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
277/20.1
F16J 15/34 (2006.01)
Patent
CA 1124759
ABSTRACT OF THE DISCLOSURE A self aligning, spiral groove, gas seal having a primary sealing ring and a mating sealing ring with opposed radially extending sealing faces, one of said rings having: (a) Spiral grooves extending inwardly from the outside diameter of the face of one of said rings, said grooves having a depth of between approximately .0001 and .0003 inches, said grooves extending across the face of said ring to provide a dam width ratio of between approximately .5 and .8 according to the formula Dam width ratio = Image where GD is the diameter of a circle defined by the boundary of the grooved area and the ungrooved area in said face, ID is the internal diameter and OD is the outside diameter; and (b) Said ring has a balance of between .8 and .9 according to the formula Balance = Image where OD is the outside diameter of the sealing interface, ID is the internal diameter and BD is the balance diameter.
327441
John Crane-Houdaille Inc
Ridout & Maybee Llp
LandOfFree
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