Blower Impeller Vanes with Openings for Airflow
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Solution Overview
Problem
Existing blower apparatuses face inefficiencies in air propulsion due to heavy impeller materials, which require significant power to rotate and are not optimized for airflow, leading to suboptimal blowing efficiency.
Innovation Solution
The use of a lightweight, laminated plastic or composite vanes with metallic layers for the impeller, featuring radial vanes with openings to reduce inertia and enhance airflow, improves the blower's efficiency and resistance to erosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If heavy metallic vanes are used for the impeller, then the impeller has sufficient strength and resistance to erosion, but the weight of the impeller increases requiring more power to rotate
Solution Approach 1:
The patent applies composite materials by combining a plastic core with laminated metallic layers to create vanes that have both the lightweight properties of plastic and the strength/erosion resistance of metal. This composite structure resolves the contradiction by achieving sufficient mechanical properties without the full weight of solid metallic vanes.
Solution Approach 2:
The patent applies local quality by selectively laminating only certain portions of the vane surfaces with metallic material rather than making the entire vane metallic. This allows erosion-resistant areas (where particles contact) to have metallic protection while other areas maintain the lightweight plastic structure, optimizing the strength-to-weight ratio.
2Productivity
If solid vanes without openings are used, then the impeller structure is simpler and stronger, but airflow through the impeller is restricted reducing blowing efficiency
Solution Approach 1:
The patent applies porous materials by incorporating openings within the vane structure that allow air to pass through. These openings enable improved airflow and blowing efficiency while the laminated composite structure maintains sufficient structural integrity to handle the mechanical stresses of operation.
3Weight of moving object
If plastic vanes are used instead of metallic vanes, then the impeller weight is reduced, but the resistance to erosion and contact with solid particles decreases
Solution Approach 1:
The patent applies composite materials by combining a plastic core with laminated metallic layers to create vanes that have both the lightweight properties of plastic and the strength/erosion resistance of metal. This composite structure resolves the contradiction by achieving sufficient mechanical properties without the full weight of solid metallic vanes.
Solution Approach 2:
The patent applies beforehand cushioning by pre-laminating the vane surfaces with protective metallic layers before the vanes are subjected to erosive particles. This protective layer acts as a sacrificial barrier that protects the underlying plastic structure from erosion, allowing the use of lighter plastic material while maintaining erosion resistance.
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 configuration reduces the power required to rotate the impeller, increases blowing efficiency, and protects against erosion, allowing for more effective air propulsion with less power input.
Implementation Method 1
The rotatable impeller is generally using the centrifugal force to aspire and propel the air inside a corresponding manifold.
Implementation Method 2
The laminated structure of the vanes can also protect the vanes against erosion and contact with solid particles when in operation.
Data Source
AI summary
Embodiments of the invention provide a blowing apparatus comprising a body including an impeller equipped with vanes including an opening therein to allow air to pass through the vane when the impeller is rotating.