公开(公告)号：US20230235751A1

公开(公告)日：2023-07-27

申请号：US18097645

申请日：2023-01-17

Applicant: Fluid Handling LLC

Inventor： Paul J. Ruzicka

IPC: F04D29/44 ,  F04D29/42

CPC classification number: F04D29/445 ,  F04D29/428

Abstract: A volute for a pump featuring a volute or casing having a pump inlet for receiving a fluid being pumped, a pump discharge for providing the fluid, and a volute or casing vane forming double volutes therein. The volute has an upper cutwater farthest from the pump discharge defining an upper cutwater throat area and an end of passage for the upper cutwater, and also has a lower cutwater closest to the pump discharge defining a lower cutwater throat and a corresponding end of passage for the lower cutwater. The upper cutwater throat area is dimensioned to be greater than and not equal to the lower cutwater throat area so the upper cutwater throat area and the lower cutwater throat area provide substantially equal flow velocity at both the upper cutwater and the lower cutwater in response to an angular sweep of the fluid being pumped. The end of passage for the upper cutwater is dimensioned with an upper cutwater passage area that is greater than and not equal to a corresponding lower cutwater passage area of the corresponding end of passage for the lower cutwater so that upper and lower cutwater passage areas at the pump discharge are balanced as a function of differing rates of flow of the fluid being pumped therein and so that the fluid being pumped from associated ends of the upper and lower cutwater passage areas meets at the pump discharge with a substantially equal velocity.

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.