Outlet Guide Vane Wheel Structure for Low-Noise Ventilators
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Solution Overview
Problem
Ventilators with outlet guide vane devices face issues such as mechanical stress-induced damage, noise generation, and efficiency loss due to complex holding mechanisms and the presence of blade passing noises, particularly in the outer region.
Innovation Solution
The outlet guide vane device features an outer housing with an outlet guide wheel having an intermediate ring held concentrically by strut vanes distributed over the circumference, optimized for airflow and strength, and integrated cooling structures to minimize noise and efficiency losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex holding mechanisms are used to support the outlet guide vane device, then the device can be securely mounted, but mechanical stress and damage risk increase
Solution Approach 1:
The holding mechanism is segmented into multiple simple support points distributed around the circumference, rather than using a single complex mounting structure. This distributes mechanical stress across multiple locations and reduces the complexity of each individual support point.
Solution Approach 2:
The outlet guide vanes are extracted from the traditional housing-integrated design and placed on a separate, freely rotatable wheel. This extraction eliminates the need for complex holding mechanisms that would otherwise be required to secure vanes within a fixed housing structure.
2Productivity
If outlet guide vanes are present in the outer region, then flow guidance is improved, but blade passing noise increases
Solution Approach 1:
The outlet guide vane wheel is designed to rotate freely along with the impeller, creating a dynamic structure that moves with the flow rather than being fixed. This dynamic configuration allows the vanes to guide flow effectively while reducing the relative velocity difference between vanes and airflow, thereby minimizing blade passing noise.
3Stability of the object's composition
If the outlet guide wheel is held by multiple distributed strut vanes, then concentric positioning is achieved, but device complexity increases
Solution Approach 1:
The strut vanes are distributed at specific locations around the circumference, providing localized support points that collectively achieve concentric positioning. Each strut vane is simple in structure, but their distributed arrangement creates the desired stable, centered configuration without requiring a complex overall structure.
Data Source
AI summary
The present disclosure relates to an outlet guide vane device for a ventilator which has at least one impeller having impeller blades and the device includes outer housing and at least one guide vane with inner guide blades, wherein the guide vane has an intermediate ring which is held preferably concentrically in/on the housing by means of at least three strut blades distributed over the circumference. The present disclosure additionally relates to a ventilator comprising a corresponding outlet guide vane device.