Sliding member

摘要

An annular sliding member which is used in a mechanical seal, is attached to a rotating shaft, and slidably comes into contact, by being applied with energizing force in the axial direction, with another annular sliding member attached to a housing, wherein the sliding surface which comes into contact with the other sliding member is formed from: a dynamic pressure generating groove which guides a fluid to be sealed from a region to be sealed to the side of a region to not be sealed of the sliding surface, and a concave-convex section configured from a plurality of minute grooves which have a shallower depth than the dynamic pressure generating groove.

主权项

1. A mechanical seal device for suppressing leakage of a fluid to be sealed from between a housing and a rotating shaft penetrating the housing, the mechanical seal device comprising:
a housing; a rotating shaft penetrating the housing; a fluid to be sealed located between the housing and the rotating shaft; a first sliding member having an annular shape and being mounted on one of the housing and the rotating shaft; and a second sliding member having annular shape and being mounted on the other of the housing and the rotating shaft that the first sliding member is not mounted on; wherein the first sliding member has a sliding surface that freely slidingly comes into contact with a sliding surface of the second sliding member after receiving an energizing force in an axial direction; wherein on the sliding surface of the first sliding member there is a dynamic pressure generating groove that guides the fluid to be sealed from a side of a region to be sealed to a side of a region to not be sealed of the first sliding member sliding surface; wherein the dynamic pressure generating groove also generates dynamic pressure resisting the energizing force by relative flow of the fluid to be sealed caused by rotation of the rotating shaft; wherein on the sliding surface of the first sliding member there is a concave-convex section that is a separate groove arranged directly adjacent and spaced apart from the dynamic pressure generating groove such that deepest points in the concave-convex section groove are shallower than any deep point in the dynamic pressure generating groove, with the concave-convex section constituted of a plurality of minute grooves extending in a direction inclined with respect to a sliding direction of the first sliding member such that the fluid to be sealed is guided from the side of the region to be sealed to the side of the region to not be sealed of the first sliding member sliding surface; and wherein the dynamic pressure generating groove and the concave-convex section each have an L-shaped groove shape in a plan view, wherein the dynamic pressure generating groove and the concave-convex section L-shaped groove shapes are radially reversed and arranged as a fitted oriented pair having matched directional properties therebetween.