Lip seals and related methods
Seal assemblies, gaskets, bearing assemblies, and their components can be used as pre-packaged seal systems and pre-packaged seal and bearing systems. The seal assemblies can be orientated in different configurations for different applications. Gaskets to restrict flow and gaskets with memory lips to operate as sealing lips can be included to increase the number of sealing points. In a pre-packaged configuration, the cylinder can be a straight cylinder, a stepped cylinder, or a split cylinder. Bearing assemblies can be pre-packaged with the sealing assemblies and service grease may optionally be used to provide lubrication and limit fluid incursion into the spring cavities.
1. A seal system comprising:
a housing cylinder having a body, an interior surface defining a bore, a retaining end having a retaining wall at one end of the bore, and an insertion end at an opposite end of the bore;
a seal assembly located in the bore of the housing cylinder, the seal assembly comprising a seal element, a locking ring, and an energizer; wherein the seal element comprising a spring cavity formed by an inside flange, an outside flange, and a center channel section having the energizer located therein, and wherein the inside flange defining an inside diameter and the locking ring being pressed against the bore and mechanically engaged to the outside flange;
a washer in contact with the seal element and the retaining wall, the washer comprising an outside perimeter and an inside perimeter defining an opening;
a shaft having a length and an outside diameter;
wherein the shaft projects through the opening of the washer and the inside diameter of the seal element; and
wherein the opening of the washer and the inside diameter of the seal element are smaller than the outside diameter of the shaft to form respective interference fit with the shaft.
2. The seal system of claim 1 , wherein the washer contacts the retaining wall along a surface of the washer from the outside perimeter to a location proximate a memory lip having a curved portion at the opening of the washer.
3. The seal system of claim 2 , wherein the washer contacts the center channel section of the seal element proximate a radial outer most end of the center channel section.
4. The seal system of claim 3 , wherein the the washer is spaced from the center section at a point proximate an excluder located on the center channel section, wherein the excluder having an inside diameter with a dimension that is smaller than the outside diameter of the shaft.
5. The seal system of claim 4 , wherein the outside flange of the sealing element is pressed against the bore of the housing cylinder.
6. The seal system of claim 1 , further comprising an excluder at an end of the center channel section having an inside diameter with a dimension that is smaller than the outside diameter of the shaft.
7. The seal system of claim 6 , further comprising grease disposed in the spring cavity.
8. The seal system of claim 1 , wherein the energizer is a canted coil spring comprising a plurality of interconnected coils that bias the inside flange away from the outside flange.
9. The seal system of claim 8 , wherein the seal element and the locking ring are mechanically engaged at the outside flange.
10. The seal system of claim 9 , wherein the washer is made from an elastomeric material or a thermoplastic material.
11. The seal system of claim 10 , wherein the locking ring has a body with an inside surface, and wherein the plurality of interconnected coils bias against the inside surface and the inside flange.
12. A seal system comprising:
a housing cylinder having a body, an interior surface defining a bore, a retaining end having a retaining wall at one end of the bore, and an insertion end at an opposite end of the bore;
a seal assembly located in the bore of the housing cylinder, the seal assembly comprising a seal element, a locking ring pressed against the bore of the housing cylinder, and a canted coil spring; wherein the seal element comprises a spring cavity formed by an inside flange, an outside flange, and a center channel section, and wherein the inside flange defines an inside diameter and the canted coil spring is located in the spring cavity;
a washer located in the bore and in contact with the seal element and the retaining wall, the washer comprising an outside perimeter and an inside perimeter defining an opening;
a shaft having a length and an outside diameter, the shaft projecting through the opening of the washer and the inside diameter of the seal element;
an excluder at an end of the center channel section and located adjacent an annular recess, wherein the excluder has an inside diameter having a dimension that is smaller than the outside diameter of the shaft; and
wherein the washer is separately formed from the seal element.
13. The seal system of claim 12 , wherein the outside flange is pressed against the bore of the housing cylinder by the locking ring.
14. The seal system of claim 13 , wherein the inside flange and the outside flange both point away from the retaining wall.
15. The seal system of claim 14 , wherein a retaining disc comprising a surface is located at the insertion end and spaced from the retaining wall.
16. The seal system of claim 15 , wherein the washer comprises a memory lip having a curved portion at the opening of the washer.
17. The seal system of claim 16 , further comprising grease disposed in the spring cavity.
18. The seal system of claim 14 , wherein the energizer is a canted coil spring comprising a plurality of interconnected coils that bias against the inside flange and the locking ring.
19. The seal system of claim 18 , wherein the seal element and the locking ring are mechanically engaged at the outside flange.
20. The seal system of claim 18 , wherein the shaft is part of a motor or a pump.
21. The seal system of claim 12 , wherein the washer is made from an elastomeric material or a thermoplastic material.
22. A seal system comprising:
a housing cylinder having a body, an interior surface defining a bore, a retaining end having a retaining wall at one end of the bore, and an insertion end at an opposite end of the bore;
a seal assembly located in the bore of the housing cylinder, the seal assembly comprising a seal element a spring cavity formed by an inside flange, an outside flange, and a center channel section and having an energizer located therein, wherein the inside flange defines an inside diameter, and wherein the inside flange and the outside flange point in a direction of the retaining wall;
a washer in contact with the center channel section and spaced from the retaining wall, the washer comprising an outside perimeter and an inside perimeter defining an opening;
a shaft having a length and an outside diameter, the shaft is located in the opening of the washer and the inside diameter of the seal element; and
a retaining disc pressed against the bore of the housing cylinder and in contact with the washer for retaining the seal assembly and the washer within the bore of the housing cylinder.
23. The seal system of claim 22 , wherein the retaining disc is a first flange section of a locking ring and the first flange section extends from a second flange section, and wherein the second flange section is mechanically engaged to the outside flange of the seal element.
24. The seal system of claim 23 , wherein the second flange section comprises an end projection that is pressed against the bore.
25. The seal system of claim 22 , further comprising service grease located in the spring cavity.
26. The seal system of claim 22 , wherein the seal element and the locking ring are mechanically engaged at the outside flange.
27. The seal system of claim 22 , wherein the washer comprises a memory lip having a curved portion at the opening that points away from the retaining wall.
28. The seal system of claim 27 , wherein the energizer is a canted coil spring comprising a plurality of interconnected coils that bias the inside flange away from the outside flange.
29. A seal system comprising:
a housing cylinder having a body, an interior surface defining a bore, a retaining end having a retaining wall at one end of the bore, and an insertion end at an opposite end of the bore;
a seal assembly located in the bore of the housing cylinder, the seal assembly comprising a seal element, a locking ring pressed against the bore of the housing cylinder, and a canted coil spring; wherein the seal element comprises a spring cavity formed by an inside flange, an outside flange, and a center channel section, wherein the inside flange defines an inside diameter, and wherein the canted coil spring is biased against the locking ring and the inside flange;
a washer located in the bore between the seal element and the retaining wall, the washer comprising an outside perimeter and a memory lip having an opening at an inside perimeter;
a shaft having a length and an outside diameter, the shaft is located in the opening of the washer and the inside diameter of the seal element;
an excluder at an end of the center channel section and located adjacent an annular recess, wherein the excluder has an inside diameter having a dimension that is smaller than the outside diameter of the shaft;
wherein the washer is separately formed from the seal element and the memory lip points away from the excluder; and
wherein the inside flange and the outside flange of the seal element point away from the retaining wall.
30. The seal system of claim 29 , wherein the memory lip is pointing away from the excluder.