公开(公告)号：US10746189B2

公开(公告)日：2020-08-18

申请号：US15452068

申请日：2017-03-07

Applicant: FLUID HANDLING LLC.

Inventor： Paul J. Ruzicka ,  Christopher J. Felix ,  Marcos D. Roimicher

IPC: F04D29/056 ,  F04D1/06 ,  F04D29/051 ,  F04D29/041 ,  F04D17/12 ,  F04D17/16

Abstract: A multi-stage pump featuring different stages configured to pump a fluid from a pump suction and to a pump discharge; and a center bushing configured between the different stages, having a center bushing side configured with pockets to balance axial forces between the different stages of the multistage pump. The pockets are configured as curved rib pockets, extruded circle or circular pockets, or full length rib pockets.

公开(公告)号：US10533570B2

公开(公告)日：2020-01-14

申请号：US15371878

申请日：2016-12-07

Applicant: Fluid Handling LLC

Inventor： Paul J. Ruzicka ,  Christopher J. Felix

IPC: F04D29/16 ,  F04D29/08 ,  F04D29/041 ,  F04D29/22 ,  B63H11/08 ,  F04D1/06 ,  F04D29/28

Abstract: An opposing impeller arrangement, for using in an opposed impeller pump, features a combination of a stage 1 impeller arrangement and a stage 2 impeller arrangement having opposing impellers and different impeller and wear ring arrangements. The stage 1 impeller arrangement may include a stage 1 impeller and a stage 1 wear ring, and be configured to receive an input fluid flow and a pump stage 1 fluid flow. The stage 2 impeller arrangement may include a stage 2 impeller and a stage 2 wear ring configured to receive the pump stage 1 fluid flow and provide a pump stage 2 fluid flow, and may also include a stage 2 wear ring undercut configured between the stage 2 impeller and the stage 2 wear ring to offset generated axial thrust in the opposing impeller pump, based upon the different impeller and wear ring arrangements.