Nok Corporation

Shota Toma

Kenichi Yoshimura

Shinya Nakaoka

Isao Tanji

Masaru Ito

Takanori Anzai

Yohei Sakai

Yusuke Yoshida

Kazuya Aihara

Norimasa Hosonuma

Toru Nakashima

Yusuke Kamiya

Fangman Xu

Shinya Omoto

Nozomu Suzuki

Akihiro Komyo

Shigenobu Honda

Maiko Miyazaki

To provide a sealing structure with an annular pocket and a sealing apparatus that can efficiently reduce exposure of a seal lip of the sealing apparatus to foreign matter entering from the outside. In a sealing structure () with a torsional damper and an oil seal, a hub pocket () has an outer circumferential surface () in an annular shape centered about an axis x that extends along the axis x and is formed in an outer shell part () that is opposed to a shaft member on an outer periphery side, a dust discharging hole () or a dust discharging groove () connected to the hub pocket () is formed in the outer shell part (), and the dust discharging hole () or the dust discharging groove () is inclined at a predetermined angle in such a manner that a discharge opening (out) is directed in an opposite direction to a rotational direction of the shaft member.

Sealing structure with annular pocket and sealing apparatus

A seal ring includes, on a side of a sliding surface thereof, a groove part () having a first groove () extending in a circumferential direction thereof and a second groove () extending from a central position of the first groove () in the circumferential direction to an inner peripheral surface and guiding sealed fluid into the first groove (), the first groove () having dynamic pressure generation grooves () configured to have a groove bottom made shallower at an end thereof in the circumferential direction than at a center thereof in the circumferential direction, and a foreign matter catching groove () that has a groove bottom deeper than the groove bottoms of the dynamic pressure generation grooves () and is capable of catching foreign matter, and the first groove () being provided at a position that falls within a sliding region in which the seal ring slides on the lateral wall surface.

Seal ring

A seal ring capable of stably reducing a rotational torque while preventing the leakage of sealed fluid. The seal ring includes: an abutment joint part () provided at one portion in a circumferential direction thereof; a plurality of dynamic pressure generation grooves () provided at intervals in the circumferential direction on a side of a sliding surface thereof sliding on a lateral wall surface of an annular groove; and foreign matter discharging grooves () that are provided between a region in which the plurality of dynamic pressure generation grooves () is arranged and the abutment joint part () in the circumferential direction on the side of the sliding surface sliding on the lateral wall surface, and that are capable of catching foreign matter intruding from the abutment joint part () and discharging the caught foreign matter to an outside of a sliding part between the seal ring and the lateral wall surface.

A seal structure has one metal gasket arranged between a pair of casings. The metal gasket is provided with a planate outer peripheral portion and a bead portion which is formed by rising up from an inner peripheral end portion of the outer peripheral portion, and is arranged so that the bead portion comes into contact with the one casing, and the outer peripheral portion comes into contact with the other casing. The bead portion elastically deforms so as to reduce its height and the outer peripheral portion elastically deforms on the basis of the elastic deformation of the bead portion, when the metal gasket is pinched by the pair of casings, and a leading end of the outer peripheral portion comes into contact with one casing at this time, whereby any gap in which salt water stays is not formed between one casing and the metal gasket.

Seal structure using metal gasket

A seal structure has a metal gasket arranged between a pair of casings. The metal gasket is provided with a bead portion in an inner peripheral side of a planate outer peripheral portion, and a bent portion in an outer peripheral side. When the metal gasket is pinched by a pair of casings, the bead portion elastically deforms so as to reduce its height and the outer peripheral portion elastically deforms on the basis of the elastic deformation of the bead portion, and comes into contact its outer peripheral end portion with one casing, whereby any gap in which salt water stays is not formed between one casing and the outer peripheral portion, and the bent portion comes into contact with the other casing, whereby any gap in which the salt water stays is not formed between the other casing and the outer peripheral portion.

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Fujisawa, Japan

Shota Toma