Sliding component

Patent metadata

Field	Value
Publication number	US-RE50849-E
Application number	US-202217959160-A
Country	US
Kind code	E1
Filing date	Oct 3, 2022
Priority date	Nov 16, 2016
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

In an exemplary embodiment of a sliding component, a sliding face S is provided with a first fluid-side negative pressure generation mechanism 12 including a first negative pressure generation groove 13 , and is provided with a second fluid-side negative pressure generation mechanism 14 including second negative pressure generation grooves 15 located on the second-fluid side of the first fluid-side negative pressure generation mechanism 12 , and is further provided with a dynamic pressure generation mechanism 10 including dynamic pressure generation grooves 11 on at least one of the first-fluid side and the second-fluid side of the first fluid-side negative pressure generation mechanism 12 and the second fluid-side negative pressure generation mechanism 14 , and the first negative pressure generation groove 13 is isolated from the second-fluid side by a land R, and the second negative pressure generation grooves 15 are isolated from the first-fluid side by a land R.

First claim

The invention claimed is:

1 . A sliding structure comprising:
a pair of sliding parts sliding relative to each other, the pair of sliding parts each having a sliding face, on both sides of which a first fluid and a second fluid of different kinds are present, wherein the sliding face of at least one of the sliding parts is provided with: a first fluid-side negative pressure generation mechanism, a second fluid-side negative pressure generation mechanism located on the second-fluid side of the first fluid-side negative pressure generation mechanism, a dynamic pressure generation mechanism comprising dynamic pressure generation grooves on the first-fluid side of the first fluid-side negative pressure generation mechanism and the second fluid-side negative pressure generation mechanism, a first land part by which the first fluid-side negative pressure generation mechanism and the second fluid-side negative pressure generation mechanism are isolated from each other, a second land part by which the first fluid-side negative pressure generation mechanism and the dynamic pressure generation mechanism are isolated from each other, a first annular circumferential groove provided in and running annularly through the first land part, and a second annular circumferential groove provided in and running annularly through the second land part, wherein: the first fluid-side negative pressure generation mechanism is formed by a first spiral mechanism constituted by grooves, wherein an end of each groove on the first-fluid side communicates with the second annular circumferential groove, and an end of each groove on the second-fluid side is isolated from the first annular circumferential groove by the first land part, the second fluid-side negative pressure generation mechanism is formed by a second spiral mechanism constituted by grooves, wherein an end of each groove on the first-fluid side communicates with the first annular circumferential groove, and an end of each groove on the second-fluid side communicates with the second-fluid side, and the dynamic pressure generation mechanism is constituted by grooves each formed by a Rayleigh step, wherein each groove having the Rayleigh step communicates with the first-fluid side and is isolated from the second-fluid side by the second land part.

2 . The sliding structure according to claim 1 , wherein each of the first and second annular circumferential grooves has a groove depth set deeper than a groove depth of the grooves of the dynamic pressure generation mechanism, the grooves of the first fluid-side negative pressure generation mechanism, and the grooves of the second fluid-side negative pressure generation mechanism.

3 . A sliding structure comprising:
a pair of sliding parts sliding relative to each other, the pair of sliding parts each having a sliding face, on both sides of which a first fluid and a second fluid of different kinds are present, wherein the sliding face of at least one of the sliding parts is provided with: a first fluid-side negative pressure generation mechanism, a second fluid-side negative pressure generation mechanism located on the second-fluid side of the first fluid-side negative pressure generation mechanism, a dynamic pressure generation mechanism comprising dynamic pressure generation grooves on the first-fluid side of the first fluid-side negative pressure generation mechanism and the second fluid-side negative pressure generation mechanism, a first land part by which the first fluid-side negative pressure generation mechanism and the second fluid-side negative pressure generation mechanism are isolated from each other, a second land part by which the first fluid-side negative pressure generation mechanism and the dynamic pressure generation mechanism are isolated from each other, a first annular circumferential groove provided in and running annularly through the first land part, and a second annular circumferential groove provided in and running annularly through the second land part, wherein: the first fluid-side negative pressure generation mechanism is formed by a first spiral mechanism constituted by grooves, wherein an end of each groove on the first-fluid side communicates with the second annular circumferential groove, and an end of each groove on the second-fluid side is isolated from the first annular circumferential groove by the first land part, the second fluid-side negative pressure generation mechanism is formed by a second spiral mechanism constituted by grooves, wherein an end of each groove on the first-fluid side is isolated from the first annular circumferential groove by the first land part, and an end of each groove on the second-fluid side communicates with the second-fluid side, and the dynamic pressure generation mechanism is constituted by grooves each formed by a Rayleigh step, wherein each groove having the Rayleigh step communicates with the first-fluid side and is isolated from the second-fluid side by the second land part.

4 . The sliding structure according to claim 3 , wherein each of the first and second annular circumferential grooves has a groove depth set deeper than a groove depth of the grooves of the dynamic pressure generation mechanism, the grooves of the first fluid-side negative pressure generation mechanism, and the grooves of the second fluid-side negative pressure generation mechanism.

5 . A sliding structure comprising:
a pair of sliding parts sliding relative to each other, the pair of sliding parts each having a sliding face, on both sides of which a first fluid and a second fluid of different kinds are present, wherein the sliding face of at least one of the sliding parts is provided with: a first fluid-side negative pressure generation mechanism, a second fluid-side negative pressure generation mechanism located on the second-fluid side of the first fluid-side negative pressure generation mechanism, a dynamic pressure generation mechanism comprising dynamic pressure generation grooves on the first-fluid side of the first fluid-side negative pressure generation mechanism and the second fluid-side negative pressure generation mechanism, a first land part by which the first fluid-side negative pressure generation mechanism and the second fluid-side negative pressure generation mechanism are isolated from each other, a second land part by which the first fluid-side negative pressure generation mechanism and the dynamic pressure generation mechanism are isolated from each other, a first annular circumferential groove provided in and running annularly through the first land part, and a second annular circumferential groove provided in and running annularly through the second land part, wherein: the first fluid-side negative pressure generation mechanism is formed by a first spiral mechanism constituted by grooves, wherein an end of each groove on the first-fluid side is isolated from the second annular circumferential groove by the second land part, and an end of each groove on the second-fluid side is isolated from the first annular circumferential groove by the first land part, the second fluid-side negative pressure generation mechanism is formed by a second spiral mechanism constituted by grooves, wherein an end of each groove on the first-fluid side is isolated from the first annular circumferential groove by the first land part, and an end of each groove on the second-fluid side communicates with the second-fluid side, and the dynamic pressure generation mechanism is constituted by grooves each formed by a Rayleigh step, wherein each groove having the Rayleigh step communicates with the first-fluid side and is isolated from the second-fluid side by the second land part.

6 . The sliding structure according to claim 5 , wherei

Assignees

• Eagle Ind Co Ltd

Inventors

• NEGISHI Yuta
• KOSUGI Sayaka
• Inoue Hiroki
• Inoue Hideyuki
• Hosoe Takeshi
• Tokunaga Yuichiro

Classifications

• F16J15/34

  with slip-ring pressed against a more or less radial face on one member · CPC title

• F16C33/741

  by means of a fluid · CPC title

• F16C33/107

  Grooves for generating pressure · CPC title

• F16C17/045 Primary

  with grooves in the bearing surface to generate hydrodynamic pressure, e.g. spiral groove thrust bearings · CPC title