Segmented Air-Guiding Wing Diffuser for Centrifugal Compression
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Solution Overview
Problem
The existing bladeless fan diffusers are prone to fractures due to shrinkage strain and have complex structures that increase labor intensity and production costs during mounting and detachment.
Innovation Solution
A diffuser design comprising separate upper and lower elements with air-guiding wings that connect to form a single air-guiding wing, reducing the risk of fractures and simplifying the structure for easier assembly and disassembly, featuring a screw connection for convenient mounting and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the air-guiding wing is formed integrally with the inner wall, then the structure is simplified, but the air-guiding wing is prone to fractures due to shrinkage strain
Solution Approach 1:
The air-guiding wing is divided into multiple independent segments that are separately formed and then assembled together. This segmentation prevents shrinkage-induced fractures by avoiding the formation of a single large integral structure, while still achieving the desired aerodynamic shape when the segments are assembled.
Solution Approach 2:
Multiple separately formed air-guiding wing segments are merged through connection structures (such as ribs or frames) to form a complete air-guiding wing assembly. This merging approach combines the benefits of separate formation (reduced shrinkage strain) with the functional integrity of a unified structure.
2Reliability
If the air-guiding wing is formed separately and fixed between inner wall and outer wall, then fracture risk is reduced, but the structure becomes complex and mounting/detachment becomes inconvenient
Solution Approach 1:
The air-guiding wing is segmented into multiple separately formed parts that are easier to manufacture without fracture risks, while the segmentation itself is designed to simplify assembly through standardized connection interfaces.
Solution Approach 2:
The connection structures between air-guiding wing segments and the inner/outer walls are designed to serve multiple functions: structural support, fracture prevention, and convenient mounting/detachment. This multi-functionality reduces overall structural complexity despite the segmented design.
3Reliability
If the air-guiding wing is formed separately and embedded in a groove of the outer wall, then fracture risk is reduced, but the structure becomes complex and mounting/detachment becomes inconvenient
Solution Approach 1:
The air-guiding wing is divided into separable segments that can be independently formed and assembled, enabling convenient mounting and detachment without requiring complex embedding structures in the outer wall.
Solution Approach 2:
The air-guiding wing segments are extracted from the outer wall groove structure and positioned within a separate framework or support structure. This extraction simplifies the outer wall design and enables easier mounting and detachment operations while maintaining fracture 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
The design reduces fractures and simplifies the assembly process, lowering labor intensity and production costs while maintaining effective airflow diffusion and swirl elimination in centrifugal compression systems and bladeless fans.
Implementation Method 1
an air-guiding channel for air flow diffusion is defined between the internal air-guiding surface and the external air-guiding surface
Data Source
AI summary
A diffuser includes a lower element and an upper element. The upper element is fixed on the lower element, and the upper element and the lower element are formed separately. The lower element includes a lower inner wall and a lower outer wall, and the upper element includes an upper inner wall and an upper outer wall. The upper inner wall is connected to the lower inner wall to form an internal air-guiding surface, the upper outer wall is connected to the lower outer wall to form an external air-guiding surface, and the internal air-guiding surface is disposed opposite to the external air-guiding surface to define an air-guiding channel for air flow diffusion. The upper element further includes an upper air-guiding wing for connecting the upper inner wall and the upper outer wall, and the lower element further includes a lower air-guiding wing for connecting the lower inner wall and the lower outer wall.