Wastewater Pump Impeller With Cutting Channels for Fibrous Clogging
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Solution Overview
Problem
Submersible pumps experience clogging issues due to fibrous materials, leading to decreased efficiency and potential system failure during fluid transport, particularly in applications involving raw organic fertilizers or animal manure.
Innovation Solution
An impeller design with curved blades and cutting channels that disintegrate solid elements, featuring backward-leaning leading edges and vacuum regions to prevent clogging, enhancing hydraulic efficiency and solid particle discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional impeller structures are used, then the pump can operate with simple design, but fibrous materials wrap around the hub and leading edge causing clogging and capacity decrease
Solution Approach 1:
The impeller employs curved blades with backward-leaning leading edges that follow streamline curvature patterns. This curved geometry prevents fibrous materials from wrapping around the hub by directing flow smoothly along the blade surface, eliminating the clogging issue while maintaining manufacturing feasibility through standard impeller forming processes
Solution Approach 2:
The impeller is divided into multiple discrete blades spaced around the hub, with each blade featuring independent curved geometry. This segmentation allows the flow to be distributed across multiple pathways, preventing any single fibrous material strand from bridging across the hub and causing blockage, while maintaining overall pump capacity
2Device complexity
If conventional impeller blades are used, then the structure remains simple, but flow separation occurs due to fibrous material deformation causing energy efficiency loss
Solution Approach 1:
The backward-leaning curved blade geometry creates streamlined flow paths that guide fibrous materials smoothly through the impeller passage. This curvature prevents flow separation by maintaining attached flow along the blade surface, reducing turbulence and energy losses while keeping the blade structure relatively simple to manufacture
Solution Approach 2:
The blade angle and curvature parameters are specifically optimized to match the flow conditions and fibrous material characteristics. By adjusting the backward lean angle and streamline curvature, the design achieves optimal energy transfer while preventing flow separation, balancing structural simplicity with energy efficiency
3Device complexity
If standard impeller design is used, then the pump structure remains conventional, but the impeller may become stuck and stop rotating causing system failure
Solution Approach 1:
The curved backward-leaning blade geometry eliminates sharp edges and protrusions that could catch fibrous materials. The smooth streamline curvature ensures that no single fibrous strand can bridge across the hub or get embedded in the blade structure, preventing the impeller from becoming stuck and maintaining system reliability
Solution Approach 2:
The design removes the vulnerable hub protrusion and leading edge features that traditionally caused fibrous material entanglement. By extracting these problematic geometric features and replacing them with smooth curved surfaces, the impeller becomes resistant to clogging and stuck conditions, significantly improving reliability
4Adaptability or versatility
If fibrous materials are present in the working fluid, then the pump must handle contaminated fluid, but the effective suction area decreases and chokes the pump entrance
Solution Approach 1:
The curved streamline blades create an expanded effective suction area by guiding flow smoothly into the impeller passage. The backward-leaning curvature prevents fibrous materials from blocking the suction entrance by directing them along the blade surface, maintaining pump capacity while handling contaminated fluid
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
The impeller effectively disintegrates fibrous materials, preventing clogging and maintaining hydraulic efficiency, ensuring reliable fluid transport and pressurization.
Implementation Method 1
Impellers are responsible for the aforementioned energy transfer. This transfer is achieved by increasing the angular momentum of the working fluid while it passes through the rotating impeller.
Implementation Method 2
submersible centrifugal wastewater pumps
Implementation Method 3
at least one cutting channel in the form of a recess to allow the solid elements in the fluid to break down on the said shaped part
Data Source
AI summary
An impeller for use in a volute part of a pump transports fluid between two predetermined locations by converting mechanical energy into flow energy using at least one drive unit.