Denso Corporation

Yushi Tsuzuki

Noriyuki Inagaki

Shuya Mikami

A valve body has a substantially disk shape and is provided in a gas passage. A shaft supports the valve body so as to be rotatable in the gas passage. A groove portion is provided at an outer edge portion of the valve body on an outer side in a radial direction so as to extend in a circumferential direction of the valve body. A seal ring is formed in an annular shape, has a separated portion as a cut in a part in the circumferential direction, and is fitted in the groove portion of the valve body. At least one of one end surface in a circumferential direction and the other end surface in the circumferential direction of the seal ring is a inclined surface that is inclined so as to guide a foreign matter accumulated in a gap of the separated portion to an outside of the gap.

Butterfly valve including a valve body, shaft, groove portion and seal ring

A composite seal ring has a resin seal ring and a metal spring. The resin seal ring is attached in an outer peripheral groove of a valve that opens and closes a passage by a rotational displacement, and the resin seal ring seals between an inner wall of a passage portion that forms the passage and the valve, in the fully closed state of the valve. A metal spring is circularly disposed within a radial width of the resin seal ring. The spring is configured to press the resin seal ring radially outwardly and radially inwardly due to the pressure acting on the resin seal ring or a deformation of the resin seal ring.

Growing community of inventors

Kariya, Japan

Yushi Tsuzuki