Manufacture of a stage casing in a hybrid process

Patent metadata

Field	Value
Publication number	US-12497978-B2
Application number	US-202218281021-A
Country	US
Kind code	B2
Filing date	Mar 4, 2022
Priority date	Mar 9, 2021
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

A centrifugal pump includes at least one impeller. The at least one impeller is surrounded by a casing. The casing includes at least one guide device. The at least one guide device is constructed as a hybrid component. The hybrid component includes at least one conventionally manufactured constituent and at least one generatively manufactured constituent.

First claim

The invention claimed is:

1 . A centrifugal pump comprising:
at least one impeller which is surrounded by a casing, wherein
the casing comprises at least one guide device,
the at least one guide device is constructed as a hybrid component comprising:
at least one conventionally manufactured constituent, and
at least one generatively manufactured constituent, wherein the at least one generatively manufactured constituent is a guide element,
at least one conventionally manufactured constituent has counter elements,
the at least one generatively manufactured guide element has elements configured to engage with the counter elements to form a plug-in connection, and
in a fully assembled state, the guide device has a plug-in configuration that enables positioning and coupling of the guide elements without the use of threaded fasteners.

2 . The centrifugal pump as claimed in claim 1 , wherein the guide device has more than two guide elements and/or less than twenty-four generatively manufactured guide elements.

3 . The centrifugal pump as claimed in claim 2 , wherein a generatively manufactured constituent has a radially outwardly curved shape.

4 . The centrifugal pump as claimed in claim 3 , wherein a generatively manufactured constituent has formations configured to guide flow.

5 . The centrifugal pump as claimed in claim 4 , wherein a generatively manufactured constituent surrounds a guide plate without any gaps.

6 . The centrifugal pump as claimed in claim 5 , wherein a generatively manufactured constituent has sealing elements configured to connect to the guide plate in a gap-free manner.

7 . The centrifugal pump as claimed in claim 1 , wherein at least one conventionally manufactured constituent is configured as a casing cover.

8 . The centrifugal pump as claimed in claim 7 , wherein a conventionally manufactured constituent is configured as a guide plate.

9 . The centrifugal pump as claimed in claim 1 , wherein the guide device has return guide vanes, configured to convey fluid to a further pump stage having an impeller.

10 . A method comprising:
using a hybrid component having at least one generatively manufactured constituent and at least one conventionally manufactured constituent as a casing having an integrated guide device for a centrifugal pump, wherein
the at least one generatively manufactured constituent is a guide element,
at least one conventionally manufactured constituent has counter elements,
the at least one generatively manufactured constituent guide element has elements configured to engage with the counter elements to form a plug-in connection, and
in a fully assembled state, the guide device has a plug-in configuration that enables positioning and coupling of the guide element without the use of threaded fasteners.

11 . A method for manufacturing a centrifugal pump via an integrative manufacturing unit, as claimed in claim 1 , the method comprising:
forming the casing cover and/or a guide plate by primary shaping and/or cutting; forming the guide elements by a generative process; fitting the guide elements, the guide plate and the casing covers together to form a guide device, produced in a hybrid manner, of a centrifugal pump casing.

12 . The method as claimed in claim 10 , wherein the guide device has return guide vanes, configured to convey fluid to a further pump stage having an impeller.

Assignees

• Ksb Se & Co Kgaa

Inventors

• Nobel Tammuz

Classifications

• F04D29/62

  of radial or helico-centrifugal pumps · CPC title

• F04D17/12

  Multi-stage pumps · CPC title

• B22F10/25

  Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS] · CPC title

• B22F5/10

  of articles with cavities or holes, not otherwise provided for in the preceding subgroups · CPC title

• B22F7/08

  with one or more parts not made from powder {(B22F7/062 takes precedence)} · CPC title