Barrel Casing Pump Helical Flow Space Integration

Solution Overview

Problem

Centrifugal pumps with separate end helix inserts are costly due to the need for additional components, increasing the pump's size and production costs, especially for large types.

Innovation Solution

The helical flow space in the transition region is formed directly by the inner contour of the barrel casing, combined with adjacent contours of the last stage casing and end-side cover, eliminating the need for a separate helix insert and maintaining comparable dimensions to pumps with conventional flow spaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If a separate helix insert is used to form the end helix, then the flow technology is optimized, but the pump size and production costs increase significantly

Engineering Contradiction:

Improveenergy loss in last pump stageVSAvoidpump size

Core Design Contradiction:

Loss of energyVSVolume of stationary object

Solution Approach 1:

The patent merges the helical flow space formation into the barrel casing itself, eliminating the need for a separate helix insert. The inner contour of the barrel casing is directly formed with the helical shape, integrating the flow optimization function into an existing structural component rather than adding a separate element.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The barrel casing is given multiple functions: it serves both as the structural enclosure and as the flow guide with helical contour. By forming the helical flow space directly in the barrel casing, the component performs both structural support and flow optimization functions simultaneously.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Loss of energy

If a separate helix insert is used to form the end helix, then the flow technology is optimized, but the production costs increase significantly

Engineering Contradiction:

Improveenergy loss in last pump stageVSAvoidproduction cost

Core Design Contradiction:

Loss of energyVSEase of manufacture

Solution Approach 1:

The patent merges the helical flow space formation into the barrel casing itself, eliminating the need for a separate helix insert. The inner contour of the barrel casing is directly formed with the helical shape, integrating the flow optimization function into an existing structural component rather than adding a separate element.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent extracts the helical flow space formation from the separate helix insert concept and incorporates it directly into the barrel casing manufacturing process. This removes the need for additional components and simplifies the production process while maintaining the flow optimization benefits.

Inventive Principle:

Principle #2Taking out (Extraction)

3Shape

If the barrel casing is made larger to accommodate the helix insert, then the helical contour can be formed, but the pump dimensions increase

Engineering Contradiction:

Improvehelical contourVSAvoidbarrel casing dimension

Core Design Contradiction:

ShapeVSLength of stationary object

Solution Approach 1:

The patent merges the helical flow space formation into the barrel casing itself, eliminating the need for a separate helix insert. The inner contour of the barrel casing is directly formed with the helical shape, integrating the flow optimization function into an existing structural component rather than adding a separate element.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12152591B2Barrel casing pump and method for manufacturing a barrel casing pump

Publication Date: 2024.11.26 KSB SE & CO KGAA

AI summary

A centrifugal pump having a barrel casing and at least one stage casing therein includes a transition from the last stage casing to the pressure connector of the barrel casing in the form of a spiral flow space. The contour of the spiral flow space is formed by a contour of the last stage casing, a contour of a cover which closes the barrel casing on an end face, and an inner contour of the barrel casing.