US 11,698,105 B2
Surface processing method of disk member of sealing apparatus, and sealing apparatus
Hisato Yonai, Fukushima (JP); Yuya Sakano, Fukushima (JP); and Masahiko Inoue, Fukushima (JP)
Assigned to NOK CORPORATION, Tokyo (JP)
Appl. No. 16/754,536
Filed by NOK CORPORATION, Tokyo (JP)
PCT Filed Oct. 24, 2019, PCT No. PCT/JP2019/041636
§ 371(c)(1), (2) Date Apr. 8, 2020,
PCT Pub. No. WO2020/090602, PCT Pub. Date May 7, 2020.
Claims priority of application No. 2018-205327 (JP), filed on Oct. 31, 2018.
Prior Publication US 2021/0215200 A1, Jul. 15, 2021
Int. Cl. B24B 7/10 (2006.01); F16C 33/74 (2006.01)
CPC F16C 33/74 (2013.01) [B24B 7/10 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A surface processing method of a disk member of a sealing apparatus for forming a plurality of fine spiral grooves on a surface of the disk member provided at the sealing apparatus, the surface processing method comprising:
moving a grinding member having a plurality of fine projections to an outer edge side while pressing the grinding member against the surface of the disk member which relatively rotates around a shaft,
wherein a polishing material which is obtained by applying abrasive grains for polishing on base cloth and which is fixed with an adhesive is used as the grinding member, and wherein, as a result of the abrasive grains being randomly arranged, dropping or moving on a surface of the polishing material, the grooves have a random shape where intervals between the grooves are not constant and where relative motion of the grinding member with respect to the disk member and shapes of the grooves does not match, and
wherein the grooves include grooves which have positions being displaced in a radial direction in each lap, grooves which break halfway, and grooves whose spiral shapes are not the same.