Seal assemblies and related methods
A seal assembly can include a sealing component and a spring energizer located within a seal cavity or spring cavity of the sealing component. The sealing component provides an exterior surface for providing protection of the seal cavity and spring energizer from an external or contaminated environment, such as the atmosphere. The sealing component can have two distinct first and second sealing points. Each distinct first sealing point can have two discrete first sealing points and each second sealing point can have two discrete second sealing points. Part of the spring energizer can extend externally of the sealing component.
1 . A seal assembly comprising:
a sealing component and a spring energizer;
a lengthwise axis passing through a center of the sealing component;
said sealing component comprising two sealing flanges, including a first sealing flange and a second sealing flange, and a cover flange defining a seal cavity with the first and second sealing flanges, said cover flange having an exterior surface and an interior surface and each of said two sealing flanges comprising a sealing lip such that the sealing component has two sealing flanges with two sealing lips;
said spring energizer positioned within said seal cavity and biasing the two sealing flanges away from one another to provide a load on said sealing lips for sealing against two different surfaces;
wherein radial-end-most surfaces of the two sealing flanges define an inside diameter of the sealing component and wherein the exterior surface of the cover flange defines an outer diameter of the sealing component, the inside diameter and the outer diameter surrounding the lengthwise axis;
wherein a first flange overhang and a second flange overhang extend axially, relative to the lengthwise axis, of a central part of the cover flange and axially of the two sealing flanges;
wherein the first flange overhang has an end edge located axially, relative to the lengthwise axis, further than the first sealing flange and the second flange overhang has an end edge located axially, relative to the lengthwise axis, further than the second sealing flange; and
wherein a flange stub extends radially from the interior surface of the cover flange, contacts the spring energizer, and spaces the spring energizer away from the interior surface of the cover flange.
2 . The seal assembly of claim 1 , wherein the spring energizer is a canted coil spring.
3 . The seal assembly of claim 1 , wherein the flange stub is located between the two sealing flanges.
4 . The seal assembly of claim 3 , wherein the flange stub has an end edge that is generally flat, concave, or convex.
5 . The seal assembly of claim 1 , wherein the first and second flange overhangs have interior surfaces that are sized to form an interference fit with corresponding structural components to be sealed by the seal assembly.
6 . The seal assembly of claim 5 , wherein each of the interior surfaces of the first and second flange overhangs defines a ring for fitting against the corresponding structural component.
7 . The seal assembly of claim 1 , wherein exterior surfaces of the first flange overhang, the second flange overhang, and the cover flange are generally planar.
8 . The seal assembly of claim 1 , wherein the seal component is made from a polymer material.
9 . The seal assembly of claim 8 , wherein the polymer material is PTFE, UHMWPE, nitrile, polyurethane, EPDM, neoprene, fluorocarbon, or chloroprene.
10 . The seal assembly of claim 1 , wherein the end edge of the first flange overhang and the end edge of the second flange overhang define a maximum width of the cover flange.
11 . The seal assembly of claim 10 , wherein the maximum width of the cover flange has a dimension that is wider than a gap defined by the two sealing flanges.
12 . The seal assembly of claim 10 , wherein the two sealing lips define a sealing lip gap dimension and wherein the two sealing flanges have a flange gap dimension adjacent the cover flange, and wherein the sealing lip gap dimension is greater than the flange gap dimension.
13 . The seal assembly of claim 10 , wherein a thickness of the first sealing flange at the sealing lip of the first sealing flange is larger than a thickness of the first sealing flange adjacent the cover flange.
14 . The seal assembly of claim 13 , wherein a thickness of the second sealing flange at the sealing lip of the second sealing flange is larger than a thickness of the second sealing flange adjacent the cover flange.
15 . The seal assembly of claim 1 , further comprising a flange stub extending from the interior surface of the cover flange, said flange stub comprising a width and a height, and wherein the width of the flange stub is spaced from the first sealing flange and the second sealing flange.
16 . The sealing assembly of claim 1 , wherein the spring energizer is recessed within the inside diameter of the sealing component.
17 . A method of using a seal assembly, comprising:
placing the seal assembly between a first structural component and a second structural component, and wherein each of the first and second structural components comprising a first surface angled to a second surface;
sealing a gap between the two structural components with the seal assembly;
wherein the seal assembly comprises:
a sealing component comprising two sealing flanges, including a first sealing flange and a second sealing flange, and a cover flange defining a seal cavity with the first and second sealing flanges, said cover flange having an exterior surface and an interior surface and each of said two sealing flanges comprising a sealing lip such that the sealing component has two sealing flanges with two sealing lips;
a lengthwise axis passing through a center of the sealing component;
a spring energizer positioned within said seal cavity and biasing the two sealing flanges away from one another to provide a load on said sealing lips to seal against first surfaces of the first and second structural components;
a flange stub unitarily formed with the cover flange and extending radially relative to the lengthwise axis from the interior surface of the cover flange, contacts the spring energizer, and spaces the spring energizer away from the interior surface of the cover flange;
wherein radial-end-most surfaces of the two sealing flanges define an inside diameter of the sealing component and wherein the exterior surface of the cover flange defines an outer diameter of the sealing component, the inside diameter and the outer diameter surrounding the lengthwise axis;
wherein a first flange overhang and a second flange overhang extend axially, relative to the lengthwise axis, of a central part of the cover flange and axially of the two sealing flanges; and
forming an interference fit between an interior surface of the first flange overhang and the second surface of the first structural component and forming an interference fit between an interior surface of the second flange overhang and the second surface of the second structural component.
18 . The method of claim 17 , wherein the flange stub is located between the two sealing flanges.
19 . The method of claim 17 , wherein the flange stub comprises an edge having a flat surface, a concave surface, or a convex surface.
20 . The method of claim 17 , wherein the interior surface of the cover flange at the first flange overhang defines an enclosed perimeter.
21 . The method of claim 17 , wherein the first flange overhang has an end edge located axially, relative to the lengthwise axis, further than the first sealing flange and the second flange overhang has an end edge located axially, relative to the lengthwise axis, further than the second sealing flange.
22 . The method of claim 17 , wherein exterior surfaces of the first flange overhang, the second flange overhang, and the cover flange are generally planar.