US 11,852,241 B2
Sliding component
Hiroshi Suzuki, Tokyo (JP)
Assigned to EAGLE INDUSTRY CO., LTD.
Appl. No. 17/425,281
Filed by Eagle Industry Co., Ltd., Tokyo (JP)
PCT Filed Jan. 31, 2020, PCT No. PCT/JP2020/003648
§ 371(c)(1), (2) Date Jul. 22, 2021,
PCT Pub. No. WO2020/162352, PCT Pub. Date Aug. 13, 2020.
Claims priority of application No. 2019-017876 (JP), filed on Feb. 4, 2019.
Prior Publication US 2022/0128088 A1, Apr. 28, 2022
Int. Cl. F16J 15/32 (2016.01); F16J 15/3256 (2016.01)
CPC F16J 15/3256 (2013.01) 12 Claims
OG exemplary drawing
 
1. A sliding component that has an annular shape and is disposed in a place where relative rotation is performed in a rotary machine, comprising a plurality of dynamic pressure generating mechanisms provided in a sliding surface of the sliding component, wherein
each of the dynamic pressure generating mechanisms includes a deep groove portion that communicates with a leakage side, and a shallow groove portion that has a first end portion communicating with the deep groove portion and a second end portion opposed to the first end portion in a circumferential direction and that extends from the first end portion to the second end portion in a circumferential direction, the shallow groove portion being shallower than the deep groove portion,
the shallow groove portion has a side wall surface formed at least on the leakage side of the second end portion so as to isolate the second end portion from the leakage side,
the shallow groove portion has an opening that is formed at the first end portion or between the first end portion and the side wall surface and that directly communicates with the leakage side,
the second end portion of the shallow groove portion is formed into a tapered shape in a plan view, and
the side wall surface is constituted by a curved surface which extends from the second end portion continuously toward a downstream side in a direction of the relative rotation up to an edge of the opening of the shallow groove.