Seal ring
AssigneeEagle Industry Co., Ltd.
InventorsWataru Kimura, Yuichiro Tokunaga, Yoshiaki Takigahira, Toru Kono, Hidetoshi Kasahara, Jun Hiromatsu, Takafumi Ota
Life of this patent
Estimating the term…
Abstract
Provided is a seal ring configured so that stable lubrication performance can be provided across a wide range of rotation speed. A seal ring for sealing a clearance between a rotary shaft and a housing includes multiple static pressure grooves provided at a sliding surface of the seal ring and arranged in a circumferential direction, the static pressure grooves being opened on a sealed fluid side and closed on an outer diameter side, a circumferential length of each of the static pressure grooves being shorter than a radial length of each of the static pressure grooves.
Claims5
A seal ring for sealing a clearance between a rotary shaft and housing, comprising:
- multiple static pressure grooves provided at a sliding surface of the seal ring and arranged in a circumferential direction, the static pressure grooves being opened on a sealed fluid side and closed on an outer diameter side, a circumferential length of each of the static pressure grooves being shorter than a radial length of each of the static pressure grooves;
- multiple communication grooves each extending in the circumferential direction on the outer diameter side, each of the communication grooves respectively being in communication with two of the static pressure grooves adjoining each other in the circumferential direction;
- and
- multiple dynamic pressure grooves each opened on the sealed fluid side, each of the dynamic pressure groove respectively being provided between two of the static pressure grooves adjoining each other in the circumferential direction,
- wherein the static pressure grooves each has a depth which is in a range from 100 μm to 1 mm.
Dependencies are inferred from the claim text.