Patent ID: 9657842
Date: 2017-05-23
CPC Classifications: F01D,F16J

Claim:
1. A dry gas shaft seal arrangement comprising: a shaft extending along an axis and a stator, wherein a rotating sealing ring is arranged on the shaft and a static sealing ring is arranged on the stator, wherein the rotating sealing ring has a rotating axial sealing surface and the stationary sealing ring has a stationary axial sealing surface, wherein the rotating axial sealing surface and the stationary axial sealing surface are arranged in such a way that they are oppositely disposed with a sealing effect in an essentially axial sealing plane, wherein a shaft seal arrangement is formed as a contactless gas seal, wherein at least one of the rotating axial sealing surface and stationary axial sealing surface has a non-rotationally symmetrical surface structuring, wherein the non-rotationally symmetrical surface structuring comprises depressions in the sealing surface, wherein the depressions have in each case a boundary line to the other sealing surface and a bottom surface defined by the boundary line of the depression which has a continuous progression which is continuously differentiable throughout the depression, wherein the depression having a depth of 0, adjoins the other sealing surface on the boundary line.