Impeller Pump Polygonal Openings for Uniform Blade Wear
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Impeller pumps experience uneven wear and reduced efficiency due to impeller blades contacting the inlet and outlet openings, leading to deformation and wear, especially when handling fluids with suspended solids and fibers, and existing solutions like grids or elliptical shapes exacerbate wear or hygiene issues.
Innovation Solution
The impeller pump design features polygonal or elliptical cross-sections for the inlet and outlet openings within the housing, with specific angles and dimensions to evenly distribute the contact points, minimizing blade deformation and ensuring uniform wear, while maintaining a seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inlet or outlet opening is equipped with a grid or comb to reduce the load on impeller blades, then the wear of impeller blades is reduced, but contaminants become trapped on the grid bars, reducing the pump's flow rate and causing hygiene concerns
Solution Approach 1:
The invention removes the grid or comb structure from the inlet or outlet opening, extracting the problematic component that caused contaminant trapping while maintaining the protective function through the polygonal cross-section design of the opening itself
Solution Approach 2:
The inlet or outlet opening is designed with a polygonal cross-section instead of a circular or symmetric shape. This asymmetric geometry creates specific contact patterns with the impeller blades that reduce wear without requiring additional protective structures, thereby maintaining flow rate while protecting the blades
2Strength
If the inlet or outlet is made elliptical to reduce the depth of indentation of impeller blades, then the blade deformation is reduced, but only a portion of the impeller blades come into contact with the edge, causing severe and uneven wear that leads to leaks
Solution Approach 1:
The invention uses a polygonal cross-section with specific geometric parameters that creates more uniform contact distribution compared to an ellipse, ensuring that multiple blades contact the opening edge evenly during rotation, thereby preventing localized severe wear and maintaining sealing performance
Solution Approach 2:
The invention optimizes the geometric parameters of the polygonal cross-section (number of sides, angles, dimensions) to achieve the right balance between reducing blade indentation depth and ensuring sufficient contact area for uniform wear distribution, preventing leak formation
3Reliability
If the impeller blades are tightly pressed against the inner wall of the pump housing to ensure sealing, then the self-priming capability is improved, but the wear of impeller blades is exacerbated
Solution Approach 1:
The polygonal cross-section of the inlet or outlet opening creates localized contact zones that concentrate the sealing function at specific points while reducing the overall contact area between the impeller blades and the housing wall, thereby maintaining sealing capability while reducing wear in non-critical areas
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 extends the service life of impeller blades by evenly distributing contact points, reducing deformation, and maintaining efficient fluid flow without trapping contaminants, thus enhancing the pump's operational efficiency and hygiene.
Implementation Method 1
they are pressed into these openings, particularly against their edges, both by their elasticity and by centrifugal forces
Implementation Method 2
an impeller wheel accommodated in the interior of the housing with a plurality of elastic impeller vanes
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present disclosure relates to an impeller pump with a housing (1) having an inlet (2) and an outlet (3) and with an impeller wheel (4) having a plurality of elastic impeller blades (5), wherein the cross-section of the inlet (2) and/or the outlet (3) on the side facing the interior of the housing has essentially the shape of a polygon, and to an impeller pump with a housing (1) having an inlet (2) and an outlet (3) and with an impeller wheel (4) rotatable about an axis of rotation (D) having a plurality of elastic impeller blades (5), wherein the cross-section of the inlet (2) and/or the outlet (3) on the side facing the interior of the housing has a longitudinal extent (L) and a transverse extent (Q), wherein the length of the longitudinal extent (L) is greater than the length of the transverse extent (Q), and wherein the longitudinal extent (L) is aligned with the axis of rotation (D) includes an angle (α).