Sliding component

Patent metadata

Field	Value
Publication number	US-12590604-B2
Application number	US-202218685177-A
Country	US
Kind code	B2
Filing date	Aug 22, 2022
Priority date	Aug 25, 2021
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

There is provided a sliding component disposed at a relative rotational location of a rotating machine to slide relative to another sliding component. The sliding component has a sliding surface provided with a fluid inlet groove communicating with at least one of a sealed fluid side space and a leakage side space and a dynamic pressure generation groove communicating with the fluid inlet groove and extending in a circumferential direction. Both side edges and a terminating end edge of the dynamic pressure generation groove are curvedly continuous with each other in a plan view.

First claim

The invention claimed is:

1 . A sliding component which is disposed at a relative rotational location of a rotating machine to slide relative to another sliding component, the sliding component having a sliding surface provided with:
a plurality of fluid inlet grooves each communicating with at least one of a sealed fluid side space and a leakage side space; and a plurality of dynamic pressure generation grooves each having one end which communicates with the fluid inlet groove and other end which is a closed end, and extending from the one end to the closed end in a circumferential direction, wherein both side edges and a closing end edge of each of the dynamic pressure generation grooves are curvedly continuous with each other in a plan view, and the closed end of one of adjacent two of the dynamic pressure generation grooves overlaps, in a view of the circumferential direction, with the fluid inlet groove communicating with remaining one of the adjacent two of the dynamic pressure generation grooves on a downstream side of relative rotation direction.

2 . The sliding component according to claim 1 ,
wherein side surfaces of the dynamic pressure generation groove extending from the side edges in a depth direction and a closing end surface of the dynamic pressure generation groove extending from the closing end edge in the depth direction are curvedly continuous with each other.

3 . The sliding component according to claim 2 ,
wherein both the side surfaces and the closing end surface are continuous with each other through a curved surface having a curvature radius in a plan view.

4 . The sliding component according to claim 3 ,
wherein the closing end surface and a bottom surface of the dynamic pressure generation groove are curvedly continuous with each other in a cross-sectional view.

5 . The sliding component according to claim 2 ,
wherein the closing end surface is a curved surface having a curvature radius.

6 . The sliding component according to claim 5 ,
wherein the closing end surface and a bottom surface of the dynamic pressure generation groove are curvedly continuous with each other in a cross-sectional view.

7 . The sliding component according to claim 2 ,
wherein the closing end surface and a bottom surface of the dynamic pressure generation groove are curvedly continuous with each other in a cross-sectional view.

8 . The sliding component according to claim 1 ,
wherein the fluid inlet groove communicates with the sealed fluid side space, and the sliding surface is further provided with a spiral groove communicating with the leakage side space and not communicating with the sealed fluid side space.

9 . A sliding component which is disposed at a relative rotational location of a rotating machine to slide relative to another sliding component, the sliding component having a sliding surface provided with:
a fluid inlet groove communicating with at least one of a sealed fluid side space and a leakage side space; and a dynamic pressure generation groove communicating with the fluid inlet groove and extending in a circumferential direction, wherein both side edges of the dynamic pressure generation groove are connected to each other by a closing end edge which is formed in a semi-elliptical shape in a plan view.

10 . A sliding component which is disposed at a relative rotational location of a rotating machine to slide relative to another sliding component, the sliding component having a sliding surface provided with:
a fluid inlet groove communicating with at least one of a sealed fluid side space and a leakage side space; and a dynamic pressure generation groove communicating with the fluid inlet groove and extending in a circumferential direction, wherein the dynamic pressure generation groove has a first side edge disposed on a leakage side in a plan view and a second side edge disposed on a sealed fluid side, and a closing end edge on a terminal end side, the first side edge and the closing end edge are connected to each other by a first arc in the plan view, the second side edge and the closing end edge are connected to each other by a second arc in the plan view.

11 . The sliding component according to claim 10 ,
wherein the first arc has a curvature radius which is different from a curvature radius of the second arc.

12 . The sliding component according to claim 11 ,
wherein the first arc has a curvature radius which is smaller than a curvature radius of the second arc.

13 . A sliding component which is disposed at a relative rotational location of a rotating machine to slide relative to another sliding component, the sliding component having a sliding surface provided with:
a fluid inlet groove communicating with at least one of a sealed fluid side space and a leakage side space; and a dynamic pressure generation groove communicating with the fluid inlet groove and extending in a circumferential direction, wherein both side edges and a closing end edge of the dynamic pressure generation groove are curvedly continuous with each other in a plan view, the closing end edge is formed by a pair of inclined straight lines and a curved line connecting the pair of inclined straight line in the plan view.

14 . A sliding component which is disposed at a relative rotational location of a rotating machine to slide relative to another sliding component, the sliding component having a sliding surface provided with:
a fluid inlet groove communicating with at least one of a sealed fluid side space and a leakage side space; and a dynamic pressure generation groove communicating with the fluid inlet groove and extending in a circumferential direction, wherein both side edges and a closing end edge of the dynamic pressure generation groove are curvedly continuous with each other in a plan view, and the dynamic pressure generation groove has both side walls which are erected from a bottom surface of the dynamic pressure generation groove and extend from both side edges in a depth direction.

Assignees

• Eagle Ind Co Ltd

Inventors

• Tokunaga Yuichiro
• Hosoe Takeshi
• KATORI Hikaru

Classifications

• F16J15/3412 Primary

  with cavities (F16J15/3424 takes precedence) · CPC title

• F16C17/045 Primary

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

• F16C33/107 Primary

  Grooves for generating pressure · CPC title

• F16C33/74

  of sliding-contact bearings · CPC title

• F16C33/1065

  Grooves on a bearing surface for distributing or collecting the liquid · CPC title