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1. (WO2015045974) SEAL RING

Pub. No.:    WO/2015/045974    International Application No.:    PCT/JP2014/074479
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Thu Sep 18 01:59:59 CEST 2014
IPC: F16J 15/46
F16J 15/18
Inventors: OHYA, Naohisa
大矢 直久
NAGAI, Junya
永井 純也
 This seal ring comprises a center shaft, an outer peripheral surface, an inner peripheral surface, a side surface, and a groove part. The center shaft is a rotational center. The outer peripheral surface is an outward-facing cylindrical surface centered about the center shaft. The inner peripheral surface, which is between the center shaft and the outer peripheral surface, is an inward-facing cylindrical surface centered about the center shaft. The side surface connects the outer peripheral surface and the inner peripheral surface. The groove part, which is formed into a groove shape indented from the side surface, extends along the circumferential direction at a gap from the outer peripheral surface, has a first end part connected to the inner peripheral surface and a second end part on the side opposite the first end part, and is configured so as to return oil coming in from the first end part to the inner peripheral surface via the second end part.