公开(公告)号：WO2020126519A1

公开(公告)日：2020-06-25

申请号：PCT/EP2019/083803

申请日：2019-12-05

Applicant: DRESSER-RAND SAS

Inventor： LEBIGRE, Olivier ,  MARINELLI, Giampiero

IPC: F16J15/30 ,  F16J15/40 ,  F16J15/44 ,  F16J15/447 ,  F01D11/02

Abstract: The invention relates to a ring-element (SPR) of a shaft seal (SHS) extending circumferentially along a central axis (X), - wherein said ring-element (SPR) is provided with conducts (RCD) to supply a seal fluid (SFL) from radially outside (ROS) to radially inside (RIS), - wherein said ring-element (SPR) is provided with two axially opposing axial contact surfaces (ACS) extending on both axial front faces (AFF) in circumferential direction (CFD). To reduce axial space requirement, improve mechanical integrity and reduce pressure loss during the passage through said ring-element (SPR) said ring-element (SPR) comprises: - a first axial annular wall (AW1) in turn comprising one said axial contact surface (ACS), - a second axial annular wall (AW2) in turn comprising the other axial contact surface (ACS), wherein said first and second axial walls (AW1, AW2) are connected to each other at inner wall surfaces (IWS), by means of axially extending connection structures (CST), wherein said inner wall surfaces (IWS) are the respective opposite sides of said axial contact surfaces (ACS), wherein said conducts (RCD) are defined by said connection structures (CST) and said inner wall surfaces (IWS).