Seal ring
AssigneeNok Corporation
InventorsUmetsu Kyohei, Nobuyuki Eguchi
Life of this patent
Estimating the term…
Abstract
A seal ring for sealing an annular clearance between two members, which are made rotatable relative to each other. The seal ring is provided with a relief 5 throughout the circumference of a sliding face side to confront the side wall face 72 of an annular groove 71. This relief 5 is set to have a radially smaller width in the vicinity of a separate portion 2 and a radially larger width at a position apart from the separate portion 2, and the portion of the relief 5 to transit from the narrower portion to the wider portion is set to have a gradually changing width.
Claims3
1-6. (canceled)
A seal assembly comprising:
- a first sealing face of a seal ring sealing a surface of one of two members which are assembled concentrically with and rotatably relative to each other;
- a second sealing face of the seal ring sealing a side wall face of an annular groove formed in the other of said two members and located on a side of an unsealing fluid, so that an annular clearance between said two members is sealed by the first and the second sealing faces;
- and
- a separate portion separated at one circumferential portion of a body of said seal ring,
- a relief keeping a part of the second sealing surface out of abutment against the side wall face of said annular groove on the side of said unsealing fluid being formed throughout a circumference of said second sealing face;
- said relief has a first portion located in a vicinity of said separate portion, a second portion spaced away from said separate portion, and a third portion located between said first portion and said second portion;
- said first portion of the relief has a first radius that is shorter than a second radius of the second portion of the relief, and the second sealing face has a radius longer than said second radius;
- and
- said third portion of the relief having a gradually changing third radius that is between the first radius and the second radius.
A seal assembly comprising:
- a first sealing face of a seal ring sealing a surface of one of two members which are assembled concentrically with and rotatably relative to each other;
- a second sealing face of the seal ring sealing a side wall face of an annular groove formed in the other of said two members and located on a side of an unsealing fluid, so that an annular clearance between said two members is sealed by the first and the second sealing faces;
- and
- a separate portion separated at one circumferential portion of a body of said seal ring,
- a relief keeping a part of the second sealing surface out of abutment against the side wall face of said annular groove on the side of said unsealing fluid being formed throughout a circumference of said second sealing face;
- said relief has a first portion in a vicinity of said separate portion, a second portion spaced away from said separate portion, and a third portion located between said first portion and said second portion;
- said first portion of the relief has a first radius that is shorter than a second radius of the second portion of the relief, and the second sealing face has a radius longer than said second radius;
- and
- said third portion of the relief having a gradual radius-changing portion.
Dependencies are inferred from the claim text.