公开(公告)号：US20210222699A1

公开(公告)日：2021-07-22

申请号：US17148778

申请日：2021-01-14

Applicant: GRUNDFOS HOLDING A/S

Inventor： Gunnar GABA

IPC: F04D29/02 ,  F04D29/046 ,  F04D29/62 ,  F16C33/76 ,  F16C35/02

Abstract: A wet-running pump bearing retainer (29) includes a radial bearing configured for a lubrication film between an inner sliding surface (41) and a rotor shaft (13) of a pump (1). The radial bearing is fitted into a radially inner section (49) that defines an axial fluid channel (45), located at a first radial distance (D1) to a rotor axis (R) and providing a fluid flow path (F1) in a first axial flow direction. The first radial distance is larger than a radius (D0) of the inner sliding surface. A radially outer section (51) extends from the inner section and defines a second axial fluid channel (47) for a flow path (F2) in a second axial flow direction, opposite to the first flow direction. The second axial fluid channel is located at a second radial distance (D2) to the rotor axis, which is larger than the first radial distance.