公开(公告)号：US20190145428A1

公开(公告)日：2019-05-16

申请号：US16204997

申请日：2018-11-29

申请人： Flowserve Management Company

发明人： Scott Judge ,  Andreas Dreiss ,  Neil Havrilla ,  David Olexson, JR.

IPC分类号： F04D29/58 ,  F04D1/06 ,  F04D13/06

摘要： A coaxial pump or turbine module directs working fluid past a rotor and through a flow path symmetrically distributed within an annulus formed between an outer module housing and an inner motor or generator coil housing. The inner housing can be cooled by working fluid in the flow path, or by a cooling fluid flowing between passages of the flow path. The flow path can extend over substantially a full length and rear surface of the inner housing. The rotor can be fixed to a rotating shaft, or rotate about a fixed shaft, which can be threaded into the motor and/or module housing. A plurality of the modules can be combined into a multi-stage apparatus, with rotor speeds independently controlled by corresponding variable frequency drives. The motor or generator can include radial or axial permanent magnets and/or induction coils. Embodiments include guide vanes and/or diffusers.