Seal structure between a rotatable member and a stationary member
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTomohiko Nishiyama, Kazuhisa Mitani
Life of this patent
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Abstract
A seal structure includes a stationary member, a rotatable member disposed within the stationary member to divide an interior of the stationary member into two chambers, a seal member mildly pressed to the stationary member and the rotatable member, and a recess for collecting grease, formed in the rotatable member. The seal structure can be used as a seal between a rotatable member and a stationary member of an air supply and gas exhaust switching mechanism of a regenerative combustion burner.
Claims10
A seal structure between a rotatable member and a stationary member comprising:
- a stationary member having an interior therein;
- a rotatable member rotatably disposed within said stationary member and dividing said interior of said stationary member into a first chamber and a second chamber such that said second chamber has a higher pressure than said first chamber;
- a seal member forming a seal between said first chamber and said second chamber made from an elastic ring, said seal member being pressed to said rotatable member and said stationary member at a first contact portion and a second contact portion, respectively, due to a radial force generated by a hoop stress in said seal member, wherein said first contact portion and said second contact portion are located on one radial side of said seal member;
- and
- a recess for collecting grease, formed in at least one of said rotatable member and said stationary member, said recess being located on a said second chamber side of said seal member;
- wherein said rotatable member and said stationary member are members of an air supply and gas exhaust switching mechanism of a regenerative combustion burner, and said first chamber and said second chamber are a chamber permitting exhaust gas to flow therethrough and a chamber permitting supply air to flow therethrough, respectively.
A sealing structure for maintaining a reliable seal between a rotatable member and a stationary member having a pressure on one side of the seal higher than a pressure on another side of the seal, comprising:
- a stationary member defining an opening and having an interior therein;
- a rotatable member rotatably disposed within the interior of said stationary member, dividing the interior of said stationary member into a first chamber and a second chamber, wherein the second chamber has a higher pressure than the first chamber;
- a seal member forming a seal between the first chamber and the second chamber made from an elastic ring, said seal member being pressed to said rotatable member and said stationary member at a first contact portion and a second contact portion, respectively, due to a radial force generated by a hoop stress in said seal member, wherein the first contact portion and the second contact portion are located on one radial side of said seal member;
- and
- a recess formed in at least one of said rotatable member and said stationary member, said recess being located in the second chamber removed from the first and the second contact portion, and immediately adjacent to and communicating with the opening formed in said stationary member so that the opening in the stationary member and the recess form one continuous path wherein said rotatable member and said stationary member are members of an air supply and gas exhaust switching mechanism of a regenerative combustion burner, and said first chamber and said second chamber are a chamber permitting exhaust gas to flow therethrough and a chamber permitting supply air to flow therethrough, respectively.
Dependencies are inferred from the claim text.