Impeller Blade Segmentation for Two-Chamber Blower Maintenance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Two-chamber extracting blowers face challenges with blade maintenance, noise generation, and effectiveness due to notching and weld usage, which complicates impeller removal and adds unnecessary components.
Innovation Solution
The impeller design features blades with varying cross-sectional areas and bent sections to enhance contaminant separation and airflow, eliminating notches and welds, allowing for easier impeller access and removal while maintaining efficiency and quiet operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If notching is used to extend blades about the housing partition, then contaminant-free air loss is reduced, but impeller removal becomes impossible without partition removal
Solution Approach 1:
The blade is divided into two distinct sections: a first section in the clean air chamber and a second section in the dirty air chamber, separated by a gap at the partition. This segmentation allows each section to function independently while maintaining the benefit of reduced contaminant-free air loss without preventing impeller removal.
Solution Approach 2:
A gap is introduced as an intermediary space between the blade sections at the partition location. This gap acts as a mediator that allows the blade to achieve extended coverage for reducing air loss while maintaining clearance for impeller removal without damaging the partition.
2Reliability
If welds are used to attach wipers to blades, then contaminant guidance is improved, but weld surfaces become pitted and weakened by contaminant contact
Solution Approach 1:
The wiper component is completely removed from the design. Instead of attaching wipers to blades, the blade geometry itself is designed to guide contaminants through the centrifugal effect and pressure differentials created by the varying cross-sectional areas of the blade sections.
Solution Approach 2:
The blade cross-sectional area varies locally along its length, with the first section having a different area than the second section. This local variation in geometry creates the necessary pressure differentials and flow patterns to guide contaminants effectively without requiring additional components or welds.
3Reliability
If additional chambers are added to skim air for contaminant separation, then contaminant removal effectiveness is improved, but device complexity increases
Solution Approach 1:
The existing two-chamber housing structure is utilized for multiple functions. The varying blade cross-sectional areas create pressure differentials that enable contaminant separation within the existing chambers, eliminating the need for additional skimming chambers while maintaining effective contaminant removal.
Solution Approach 2:
The blade cross-sectional area parameter is varied along the blade length to create different pressure zones. This parameter change enables effective contaminant separation using the existing housing structure, avoiding the need for additional chambers or components.
4Ease of manufacture
If uniform blade cross-sectional areas are used, then manufacturing is simplified, but pressure differentials between chambers are insufficient for effective separation
Solution Approach 1:
The blade is designed with non-uniform cross-sectional areas, where the first section has a different area than the second section. This local variation optimizes pressure differential generation for effective contaminant separation while remaining manufacturable through standard blade forming processes.
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 contaminant separation efficiency, reduces noise, and simplifies impeller maintenance by avoiding welds and additional components, creating a more effective and quieter two-chamber contaminant-extracting blower.
Implementation Method 1
use the centrifugal effect of the blades to separate the air from the heavier contaminants
Implementation Method 2
the construction of the blades of the impeller create an area of low pressure that draws air into the blower
Data Source
AI summary
An impeller for use in a two-chamber extracting blower that separates liquid and solid contaminants from a supply of and provides a supply of clean air moving at high velocity air. The impeller includes a plurality of blades wherein each blade includes a first section perpendicular to and formed of the blade and a second section perpendicular to the first section, also formed of the blade and radiating outward. The height of each section and the construction of the main section of the blade create differing pressure zones during rotation of the impeller, segregating air contain the impurities and prompting separation of the impurities. The construction of the first and second sections promotes more efficient and quieter operation, strengthens the blade, and permits removal of the impeller.