Diagonal Flow Fan Air Guiding Ring and Dynamic Balancing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional diagonal flow fans suffer from low efficiency, high noise, and poor dynamic balance, and fail to meet stringent energy efficiency standards set by the European Union, particularly due to inadequate air guiding and balancing mechanisms.
Innovation Solution
A diagonal flow fan design featuring an air guiding ring with a trumpet-shaped end, a gap between the air guiding ring and fan wheel, a balance nail for dynamic balance, and an outer rotor motor with a steel ring for improved concentric positioning, enhancing airflow efficiency and reducing backflow loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If no air guiding ring is provided at the air inlet cover, then the structure is simpler, but air loss at the air inlet increases and energy efficiency decreases
Solution Approach 1:
An air guiding ring is introduced as an intermediary component between the air inlet cover and the fan wheel. This ring serves as a mediator that directs airflow smoothly into the fan wheel, preventing air loss and improving energy efficiency without significantly complicating the overall structure.
2Stability of the object's composition
If the balancing component is fixedly mounted at the blade, then the dynamic balancing effect is improved, but the structure becomes more complex and debugging becomes difficult
Solution Approach 1:
The balancing component is extracted from the blade structure and mounted separately on the fan wheel hub. This separation allows the balancing function to be achieved independently, simplifying the overall structure and making debugging easier while maintaining dynamic balance.
3Loss of energy
If the European Union energy efficiency standards are implemented, then energy efficiency is improved, but manufacturing cost and design complexity increase
Solution Approach 1:
The design optimizes key parameters such as the gap between the air guiding ring and fan wheel (0.5-2mm), the dimensions and shape of the air guiding ring, and the balancing component positioning. These parameter adjustments improve energy efficiency to meet EU standards while avoiding excessive design complexity.
4Loss of energy
If a gap is provided between the air guiding ring and fan wheel, then airflow efficiency is improved and backflow loss is reduced, but the structure becomes more complex
Solution Approach 1:
The air guiding ring is designed with specific local characteristics: a trumpet-shaped end at the air inlet, specific gap dimensions (0.5-2mm) from the fan wheel, and optimized cross-sectional shape. These local quality adjustments reduce backflow loss and improve airflow efficiency without requiring major structural changes.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A diagonal flow fan, comprising an airflow duct (8), a motor (6), an impeller (2), a blade (4), an airflow guide ring (1) and a hub (3); one end of the airflow guide ring (1) is connected to the airflow duct (8); the blade (4) and the hub (3) are located inside the impeller (2); one end of the blade (4) is connected to the hub (3), and the other end is connected to the impeller (2); the motor (6) is located inside and connected to the hub (3); the other end of the airflow guide ring (1) is located at an inner side of the impeller (2), and a gap exists between the airflow guide ring (1) and the impeller (2); a motor shaft matches the impeller (2), employing a concentric positioning configuration; and a balance component (9) is fixedly installed at a peripheral surface of the impeller (2), thereby achieving dynamic balancing. The diagonal flow fan has a compact structure and a dramatically improved overall efficiency.