公开(公告)号：WO2019199321A1

公开(公告)日：2019-10-17

申请号：PCT/US2018/027507

申请日：2018-04-13

Applicant: DRESSER-RAND COMPANY

Inventor： MOHR, Byron L. ,  KUNKEL, Edward

IPC: F04D29/058 ,  F04D17/12 ,  F04D25/06

Abstract: A centrifugal compressor (20), with a shaftless impeller (50), is rotatively mounted on a journal. The journal is incorporated within a stationary journal shaft (40) that spans the impeller hub (52), or in a journal stub (80) that projects into at least one of the axial ends of the impeller hub, or in a pair of opposed, first and second journal stubs (142, 146). A magnetic bearing (60) is interposed between the journal and a hollow hub of the impeller. The journal and magnetic bearing support and position the impeller hub within an impeller cavity of the compressor casing (22). An independent impeller drive (151) rotates the impeller. A drive shaft (150), which is independent of the journal, is coupled to the impeller. Respective drive motor (300), rotor and stator permanent magnets, and/or electromagnetic coils are embedded within the respective, opposing journal and hub.