US 12,467,538 B2
Sliding component
Sayaka Miyazaki, Tokyo (JP); Hiroki Inoue, Tokyo (JP); Yuta Negishi, Tokyo (JP); and Yuki Maetani, Tokyo (JP)
Assigned to EAGLE INDUSTRY CO., LTD., Tokyo (JP)
Appl. No. 17/433,561
Filed by Eagle Industry Co., Ltd., Tokyo (JP)
PCT Filed Mar. 18, 2020, PCT No. PCT/JP2020/011926
§ 371(c)(1), (2) Date Aug. 24, 2021,
PCT Pub. No. WO2020/196145, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-054193 (JP), filed on Mar. 22, 2019.
Prior Publication US 2022/0145992 A1, May 12, 2022
Int. Cl. F16J 15/34 (2006.01)
CPC F16J 15/34 (2013.01) 6 Claims
OG exemplary drawing
 
1. A pair of sliding components which slidably rotate relative to each other and are formed in an annular shape, the sliding components having sliding surfaces formed in end surfaces of the sliding components facing to each other in an axial direction, respectively, wherein
the sliding surface of one of the sliding components is provided with a plurality of dynamic pressure generation mechanisms circumferentially arranged, each of the dynamic pressure generation mechanisms including an introduction groove portion communicating with a sealed fluid side of the sliding surface of the one of the sliding components through an opening portion of the introduction groove portion and a dynamic pressure generation groove portion that generates a dynamic pressure, that has a communication end portion communicating with the introduction groove portion and a closed end portion opposed to the communication end portion in the axial direction and that extends in a circumferential direction,
the dynamic pressure generation groove portion is isolated, throughout a circumferential length thereof, from the sealed fluid side of the sliding surface of the one of the sliding components by a land,
the introduction groove portion is partially defined by a first wall surface which is formed on a side adjacent to the dynamic pressure generation groove portion communicating with the introduction groove portion and a second wall surface which is opposed to the first wall surface in the circumferential direction,
the first wall surface includes a first inclined surface which is formed on the sealed fluid side and on a side of the opening portion of the introduction groove portion, and which is inclined with respect to a radial direction such that an edge of the first inclined surface on the sealed fluid side is close to the dynamic pressure generation groove portion,
the first wall surface further includes a radial surface which is formed on a leakage side to be continuous to the first inclined surface and which extends in parallel to the radial direction,
the second wall surface includes a second inclined surface which is formed on the sealed fluid side and on a side of the opening portion of the introduction groove portion, and which is inclined with respect to the radial direction such that an edge of the second inclined surface on the sealed fluid side is close to the first inclined surface,
the second wall surface further includes a radial surface which is formed on a leakage side to be continuous to the second inclined surface and which extends in parallel to the radial direction, and
the sliding surface of one of the sliding components between adjoining two of the dynamic pressure generation mechanisms is formed to be grooveless.