US 11,892,081 B2Granted

Sliding component

AssigneeEagle Industry Co., Ltd.

InventorsHiroki Inoue, Yuta Negishi, Minori Onuma, Iwa Ou, Tadatsugu Imura, Hiroshi Suzuki

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Abstract

A sliding component having excellent lubricity and a high recovery rate of a sealed fluid is provided. In a mechanical seal as a sliding component in which a plurality of spiral grooves serving as a plurality of dynamic pressure generation grooves extending from a low pressure side to a high pressure side are formed on a sliding surface of a stationary seal ring serving as any one sliding member in the mechanical seal, the sliding surface is provided with an annular groove serving as a recessed portion extending in a circumferential direction and opened to the low pressure side and the annular groove communicates with the spiral groove.

Claims4

Dependent claims

A sliding component comprising a pair of sliding members, one of the sliding members having a sliding surface provided with a plurality of dynamic pressure generation grooves extending from a leakage side to a sealed fluid side,

wherein the sliding surface is provided with a recessed portion extending in a circumferential direction and opened to the leakage side,
wherein the recessed portion communicates with the dynamic pressure generation grooves,
wherein a bottom surface of the recessed portion is formed to be equal in depth to or higher than a bottom surface of each of the dynamic pressure generation grooves at a boundary between the recessed portion and each of the dynamic pressure generation grooves,
wherein the recessed portion has a circumferential width larger than circumferential lengths of the dynamic pressure generation grooves, and
wherein each of the dynamic pressure generation grooves radially overlap with a groove portion of the recessed portion which is protruded in the circumferential direction from each of the dynamic pressure generation grooves.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/628,158Filed 10 Jul 2020
Priority: JP 2019-13795226 Jul 2019
Published: US 2022/0275828 A11 Sep 2022
Granted: 6 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F16C 17/045
For axial load only: with grooves in the bearing surface to generate hydrodynamic pressure, e.g. spiral groove thrust bearings
F16J 15/342
With cavities: with means for feeding fluid directly to the face
F16C 33/107
Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid: grooves…
F16J 15/3412
At least one ring having an uneven slipping surface: with cavities