Eagle Industry Co., Ltd.

Nok Corporation

Takeshi Hosoe

Hideyuki Inoue

Yuta Negishi

Yuichiro Tokunaga

Masatoshi Itadani

Keiichi Chiba

Wataru Kimura

Hikaru Katori

Hiroshi Kubota

Akira Yoshino

Hiroki Inoue

Tetsuya Iguchi

Kenji Kiryu

Yuki Maetani

Ryoma Yamakawa

Tadatsugu Imura

Kazumasa Sunagawa

Ayano Tanishima

Yuuichiro Tokunaga

Yoshiaki Takigahira

Hidetoshi Kasahara

Yuki Sasaki

Takafumi Ota

Tetsuzo Okada

Nobuo Nakahara

Minori Onuma

Sayaka Kosugi

Ryosuke Uchiyama

Yasuhiro Ikeda

Hideki Kawai

Shinya Yamamoto

Toru Kono

Masamitsu Sanada

Hideki Tomoto

Koichi Mori

Hiroki Oshima

Tadahiro Kimura

Shinji Nishida

Masatoshi Seki

Satoshi Yasu

Haruhiro Osada

Kazumasa Sungawa

Daisuke Morimiya

Tomoko Yamaki

Keita Kajihara

An annular sliding component includes a sliding surface provided with a plurality of fluid introduction grooves communicating with a space on the side of a sealing target fluid and introducing the sealing target fluid thereinto and a plurality of inclined grooves extending from a leakage side toward the sealing target fluid and generating a dynamic pressure and the sliding surface of the sliding component is provided with a reverse inclined groove which is provided on the side of the sealing target fluid of the inclined groove, extends in a reverse direction with respect to the inclined groove, and generates a dynamic pressure.

Sliding component

An annular sliding component includes a sliding surface provided with a plurality of fluid introduction grooves communicating with a space on the side of a sealing target fluid and introducing the sealing target fluid and a plurality of inclined grooves extending from a leakage side toward the sealing target fluid and generating a dynamic pressure and the sliding surface of the sliding component is provided with at least a concave portion disposed between adjacent two of the fluid introduction grooves in the circumferential direction.

The purpose of the present invention is to provide a slide component that can exhibit sealing performance and lubricity regardless of rotating direction. A pair of slide componentsthat slide relative to each other have sliding faces S that slide relative to each other, and a sealed fluid-side peripheryand a leakage-side periphery. The sliding face S of at least one slide componentof the pair of slide componentsincludes: a fluid introduction groovein communication with the sealed fluid-side periphery; a first pressure generation mechanism 12 of which one end is in communication with the fluid introduction grooveand the other end is surrounded by a land portion R; and a second pressure generation mechanism 11 of which one end is in communication with the leakage-side peripheryand the other end is surrounded by an annular land portion R. The fluid introduction grooveand the other endof the first pressure generation mechanisminclude overlapping portions Lp overlapping circumferentially.

Slide component

In an exemplary embodiment, a pair of sliding components has sliding surfaces that slide with respect to each other, wherein at least one of the sliding surfaces, sliding surface S, includes a random dimple groupin which plural dimplesare randomly arranged, and the random dimple groupis arranged to be biased in the circumferential direction of the sliding surface S. The sliding components have an improved lubricating property and reliability of a sealing property.

The purpose of the present invention is to provide a mechanical seal in which a stationary-side sealing ring can follow the movement of a rotating-side sealing ring to provide reliable sealing properties and by which the entire device can be made compact. A mechanical seal in which a rotating-side sealing ringattached to a shaftand a stationary-side sealing ringattached to a housingslide relative to each other and seal between the housingand the shaftincludes a casewhich is attached to the housingand which contains the stationary-side sealing ring, and a seal memberwhich is disposed between the caseand the stationary-side sealing ring, and the caseincludes a holding partwhich regulates the seal memberfrom moving to both sides in the axial direction thereof.

Mechanical seal

Provided is a sliding component with less fluid leakage. A sliding component has a pair of sliding members at least one of which has positive pressure generation mechanisms and negative pressure generation mechanisms formed at a sliding surface of the sliding member. The negative pressure generation mechanisms are arranged on a low-pressure fluid side with respect to the positive pressure generation mechanisms. Adjoining two of the negative pressure generation mechanisms in a circumferential direction overlap with each other in a radial direction.

In an exemplary embodiment, a pair of sliding components has sliding surfaces that slide with respect to each other, wherein at least the sliding surface S on one side includes a random dimple groupin which plural dimplesare randomly arranged, and at least one land portionthat partitions radial portionsof the random dimple group. According to the configurations, a lubricating effect and a sealing effect can be improved.

In an exemplary embodiment of a sliding component, a sliding face S is provided with a first fluid-side negative pressure generation mechanismincluding a first negative pressure generation groove, and is provided with a second fluid-side negative pressure generation mechanismincluding second negative pressure generation grooveslocated on the second-fluid side of the first fluid-side negative pressure generation mechanism, and is further provided with a dynamic pressure generation mechanismincluding dynamic pressure generation grooveson at least one of the first-fluid side and the second-fluid side of the first fluid-side negative pressure generation mechanismand the second fluid-side negative pressure generation mechanism, and the first negative pressure generation grooveis isolated from the second-fluid side by a land R, and the second negative pressure generation groovesare isolated from the first-fluid side by a land R.

In an exemplary embodiment, a sliding component includes a pair of sliding parts sliding relatively to each other. One sliding part is a stationary-side seal ring, and the other sliding part is a rotating-side seal ring, wherein the seal rings have sliding faces S formed radially for sealing a liquid or a misty fluid as a sealed fluid against leakage. At least one of the sliding faces S is provided with: spiral grooveswhich have upstream endsconnected to a leakage side, and downstream endsnot connected to a circumferential edge on a sealed-fluid side, and are disposed at an angle from upstream to downstream; and discharge groovesdisposed at an angle such that their upstream endsare located on the leakage side and their downstream endsare located on the sealed-fluid side.

In an exemplary embodiment, a pair of sliding components has annular sliding surfaces that slide with respect to each other in which plural dimplesare arranged on at least sliding surface S on one side, wherein the plural dimplesare randomly arranged to form a random dimple group, and the dimplesare arranged in a manner that a radial-direction coordinate average of centers of the dimplesof the random dimple groupis smaller than a sliding radiusof the sliding surface S.

In an exemplary embodiment, a sliding component includes a pair of sliding partsandsliding relative to each other, with a high-pressure gas present on one side of the pair of sliding partsandand a low-pressure liquid on the other side. At least the sliding parthas a sliding face S provided with positive pressure generation mechanismseach having a positive pressure generation groove, and provided with an annular deep grooveon the high-pressure gas side. The annular deep grooveis isolated from the high-pressure gas side by a land R, and is connected to the low-pressure liquid side through radial deep grooves. The sliding component is capable of fulfilling both conflicting conditions of sealing and lubrication, with a gas on the high-pressure fluid side and a liquid on the low-pressure fluid side.

In an exemplary embodiment, a sliding component includes a pair of sliding partsandsliding relatively to each other and having sliding faces S formed radially for sealing a liquid or a misty fluid as a sealed fluid against leakage. One sliding part is a stationary-side seal ring, and the other sliding part is a rotating-side seal ring. At least one of the sliding faces S is provided with positive pressure generation mechanismshaving positive pressure generation groovesconfigured to communicate with a circumferential edge of the sliding face S on the sealed-fluid side and not to communicate with a circumferential edge on the leakage side, and discharge groovesdisposed at an angle such that upstream ends are located on the leakage side and downstream ends are located on the sealed-fluid side.

A sliding component is provided. At least one sliding face of sliding faces sliding relatively to each other of a pair of sliding parts of annular shapes is provided with positive pressure generation mechanisms with positive pressure generation grooves and negative pressure generation mechanisms with negative pressure generation grooves. The positive pressure generation grooves and the negative pressure generation grooves are separated from the opposite-to-sealed-fluid side by a land. Deep grooves deeper than the groove depth of the positive pressure generation grooves and the negative pressure generation grooves are located at least on the opposite-to-sealed-fluid side of the positive pressure generation grooves and the negative pressure generation grooves. The deep grooves are provided in such a manner as to communicate at least with the sealed fluid side.

Provided is a brush seal in which the leakage of a sealed fluid is small. The brush seal includes: a brush formed of a bunch of a plurality of bristles; and an annular back plate arranged at a low-pressure side of the brush and provided with a plurality of grooves into which a sealed fluid is to be introduced. In the brush seal, the plurality of grooves are inclined with respect to a circumferential direction of the back plate and with respect to an extending direction (B) of the brush.

Brush seal

A sliding component includes a pair of sliding parts of which a rotating-side sliding part rotates in both forward and reverse directions. In the sliding component, at least one of the sliding parts has a sliding face provided with positive pressure generation grooves on the sealed fluid side, and a negative pressure generation groove on the opposite-to-sealed-fluid side and separated from the opposite-to-sealed-fluid side by a land, and a deep groove communicating with the sealed fluid side on the sealed fluid side of the negative pressure generation groove. The positive pressure generation grooves each have an upstream end communicating with the deep groove, and the negative pressure generation groove has an upstream inlet and a downstream outlet that communicate with the deep groove, and an intermediate portion between the inlet and the outlet located on the opposite-to-sealed-fluid side of the inlet and the outlet.

Growing community of inventors

Tokyo, Japan

Takeshi Hosoe