Open impeller for submergible pump configured for pumping liquid comprising abrasive matter

    公开(公告)号:US12031554B2

    公开(公告)日:2024-07-09

    申请号:US18026727

    申请日:2021-09-20

    Inventor: Jan Wilkström

    Abstract: An open impeller for a submergible pump for pumping abrasive fluids. The impeller has a cover plate, a hub and at least two spirally swept blades, each blade having a leading edge, a trailing edge, and a lower edge extending from the leading edge to the trailing edge and separating the suction and pressure sides of the blade. At least one blade includes a winglet at the lower edge projecting from the suction side, located radially outside an inner radius of the impeller, and extending circumferentially to the trailing edge at the suction side at a maximum radius of the impeller. The lower edge and winglet lower wear surface are configured to be located opposite of and facing a pump wear plate. The inner radius is equal to the largest of the maximum radius of the impeller multiplied by 0.6, and an inlet radius of the impeller multiplied by 1.2.

    Multistage pump and subsea pumping arrangement

    公开(公告)号:US11988213B2

    公开(公告)日:2024-05-21

    申请号:US16936474

    申请日:2020-07-23

    CPC classification number: F04D13/08 F04D1/06 F04D13/12 F04D29/043

    Abstract: A multistage pump for installation on a sea ground includes a common housing, a pump unit arranged in the common housing, a drive unit arranged in the common housing, and a coupling. The common housing includes a pump inlet and a pump outlet, the pump unit including a plurality of impellers to convey a compressible fluid from the pump inlet to the pump outlet, and a pump shaft, on which each impeller is mounted, each impeller being a radial or semi-axial impeller. The drive unit includes a drive shaft to drive the pump shaft, and an electric motor configured to rotate the drive shaft about an axial direction. The coupling couples the drive shaft to the pump shaft. The pump unit conveys the fluid in a dense phase at the pump outlet, and at least two impellers of the plurality of impellers have a different specific speed.

Patent Agency Ranking