Rotary Face Seal Assembly
First Claim
1. A seal assembly adapted for use in sealing a joint having a first member pivotable about a rotational axis relative to a second member thereof, the seal assembly comprising:
- first and second annular seal rings, the first and second annular seal rings each having a loading surface extending axially and a sealing face extending radially to an outer perimeter, each sealing face having a sealing band disposed adjacent the outer perimeter, the first and second annular seal rings abutting one another such that the sealing band of the first annular seal ring is in contacting relationship with the sealing band of the second annular seal ring; and
first and second annular load rings, the first annular load ring engaging the loading surface of the first annular seal ring, the second annular load ring engaging the loading surface of the second annular seal ring;
wherein each sealing band is brush polished such that the sealing band has a surface roughness average of about 0.08 micrometers Ra or less.
1 Assignment
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Accused Products
Abstract
A seal assembly, adapted to seal a joint having a first member pivotable about a rotational axis relative to a second member thereof, includes first and second annular seal rings and first and second annular load rings. The first and second seal rings each has a loading surface, extending axially, and a sealing face, extending radially to an outer perimeter. Each sealing face has a sealing band disposed adjacent the outer perimeter. The first and second seal rings abut one another such that the sealing bands of the first and second seal rings are in contacting relationship with each other. The first and second load rings engage the loading surface of the first and second seal rings, respectively. Each sealing band is brush polished such that it has a surface roughness average of about 0.08 micrometers Ra or less.
17 Citations
20 Claims
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1. A seal assembly adapted for use in sealing a joint having a first member pivotable about a rotational axis relative to a second member thereof, the seal assembly comprising:
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first and second annular seal rings, the first and second annular seal rings each having a loading surface extending axially and a sealing face extending radially to an outer perimeter, each sealing face having a sealing band disposed adjacent the outer perimeter, the first and second annular seal rings abutting one another such that the sealing band of the first annular seal ring is in contacting relationship with the sealing band of the second annular seal ring; and first and second annular load rings, the first annular load ring engaging the loading surface of the first annular seal ring, the second annular load ring engaging the loading surface of the second annular seal ring; wherein each sealing band is brush polished such that the sealing band has a surface roughness average of about 0.08 micrometers Ra or less. - View Dependent Claims (2, 3, 4, 5)
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6. A seal ring for a seal assembly comprising:
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a cylindrical body, the cylindrical body extending axially between a load end and a seal end; a sealing flange, the sealing flange disposed adjacent the seal end of the cylindrical body, the sealing flange projecting radially from the cylindrical body to an outer perimeter of the sealing flange, the sealing flange including a sealing face, the sealing face having a sealing band disposed adjacent the outer perimeter of the sealing flange and an inner relieved area disposed between the sealing band and an inner perimeter of the sealing flange; wherein the sealing band is brush polished such that the sealing band has a surface roughness average of about 0.08 micrometers Ra or less. - View Dependent Claims (7, 8, 9, 10)
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11. A method for preparing a seal ring for a seal assembly, the method for preparing comprising:
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machining the seal ring to at least one predetermined tolerance; lapping a sealing face of the seal ring to define an inner relieved area; lapping the sealing face of the seal ring to flatten a sealing band; and polishing the sealing band with a brush such that the sealing band has a surface roughness average of about 0.08 micrometers Ra or less. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification