Centrifugal Pump Impeller Contour Angle Optimization
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Solution Overview
Problem
Existing centrifugal pumps with impeller wheels have limitations in terms of construction, assembly, and efficiency, particularly due to the conventional conical meridional-section contour of the impeller wheels.
Innovation Solution
The proposed impeller wheel features a unique outer contour with inclined contour lines, where the second contour line is inclined by a second angle that is at least 0.05° and maximally 2° smaller than the first angle, optimizing the gap between the impeller wheel and the conveying unit and enhancing assembly alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional conical meridional-section contour is used for the impeller wheel, then the structure is simple, but the efficiency and performance are limited
Solution Approach 1:
The invention changes the geometric parameters of the impeller wheel by introducing a specific contour design with two contour lines having different inclinations (first angle and second angle, where the second angle is at least 0.05° and maximally 2° smaller than the first angle). This parameter optimization improves fluid flow characteristics and pump efficiency while maintaining manufacturing feasibility.
2Productivity
If the gap between the impeller wheel and conveying unit is reduced to improve efficiency, then performance increases, but alignment during assembly becomes more difficult
Solution Approach 1:
The invention applies local quality by creating a non-uniform gap distribution along the impeller wheel circumference. The gap is intentionally larger in the entry region and smaller in the exit region, optimized by the specific contour line inclinations. This local optimization maintains high efficiency while providing alignment tolerance during assembly.
3Productivity
If the contour lines are made steeper to improve fluid conveyance, then productivity increases, but manufacturing precision requirements increase
Solution Approach 1:
The invention optimizes the angular parameters of the contour lines by specifying that the second angle is at least 0.05° and maximally 2° smaller than the first angle. This controlled parameter difference achieves effective fluid conveyance while maintaining reasonable manufacturing tolerances, avoiding excessively steep angles that would be difficult to manufacture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design improves the construction and assembly of the impeller wheel, leading to increased efficiency and performance of the centrifugal pump, while simplifying the alignment process during assembly.
Implementation Method 1
an impeller wheel (10), in particular for a centrifugal pump (20)... configured for conveying the fluid in the operating state
Data Source
AI summary
An impeller wheel, in particular for a centrifugal pump, has in at least one side view perpendicular to a rotary axis an outer contour that is spaced apart radially from the rotary axis, the outer contour comprising a first contour line which is inclined relative to the rotary axis by a first angle, and comprising a second contour line which directly follows the first contour line and is inclined relative to the rotary axis by a second angle, the second angle being by at least 0.05° and maximally 2° smaller than the first angle.