Fan Impeller One-Piece Hollow Hub Cooling
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Solution Overview
Problem
Existing fan impellers require separate hub parts for assembly, which complicates the shaft-hub connection and impedes motor cooling, as the hub part covers the motor, preventing effective axial cooling.
Innovation Solution
A one-piece hollow hub part with radially extending connecting struts for motor shaft mounting, incorporating continuous cooling blades and recesses for enhanced air circulation and heat dissipation, allowing integrated motor shaft connection and improved cooling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate hub part is used for shaft-hub connection, then assembly flexibility is improved, but device complexity increases and motor cooling is impeded
Solution Approach 1:
The hub part is integrated directly onto the impeller in one piece, merging two previously separate components (hub and impeller) into a single unified structure. This eliminates the need for separate assembly of the hub part while maintaining the shaft-hub connection functionality, thereby reducing device complexity without sacrificing assembly flexibility.
2Stability of the object's composition
If a solid hub part is used for shaft mounting, then structural stability is improved, but motor cooling performance deteriorates
Solution Approach 1:
The hub part is designed as a hollow body with internal cavities and flow channels instead of a solid structure. These voids allow cooling air to circulate through the hub, providing thermal pathways for heat dissipation from the motor while maintaining sufficient structural stability through strategic wall thickness and support elements.
Solution Approach 2:
The hollow hub structure incorporates flow channels that guide cooling air through the hub interior, utilizing fluid dynamics principles to enhance heat removal from the motor. The air flow paths are designed to maximize cooling efficiency while maintaining structural integrity.
3Temperature
If connecting struts are made thin for air flow, then cooling performance is improved, but structural rigidity deteriorates
Solution Approach 1:
The connecting struts are designed with curved or arc-shaped geometries rather than straight thin walls. This curvature increases the moment of inertia and bending resistance of the struts, providing enhanced structural rigidity and load-bearing capacity while maintaining sufficient cross-sectional area for air flow and cooling performance.
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
Simplifies assembly, ensures effective motor cooling through air circulation and turbulence, and increases cooling capacity by guiding air out of the hub part adjacent to the blower motor, enhancing overall performance and stability.
Implementation Method 1
The connecting struts also generate air turbulence, air circulation or air flow within the cavity and prevent heat build-up.
Implementation Method 2
The connecting struts also generate air turbulence, air circulation or air flow within the cavity and prevent heat build-up.
Implementation Method 3
the cooling blades can be curved or curved in order to generate a flow in the cavity onto certain components, for example the blower motor, or onto its lateral surface.
Implementation Method 4
the air can thus be guided out of the cavity of the hub part adjacent to the blower motor. This significantly increases the cooling capacity of the hub part.
Data Source
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AI summary
The invention relates to an impeller (1) of a fan, having impeller blades (7) which are arranged such that they are distributed in the circumferential direction, and having a hub part (2) which is arranged around a rotational axis of the impeller (1), is configured in one piece on the impeller (1) as a hollow body which encloses a cavity, and has an axially central motor shaft seat (12) for receiving a motor shaft (8) in a fastening manner, wherein the motor shaft seat (12) is attached to the hollow body of the hub part (2) via connecting struts (10) which extend in the shape of a star from the motor shaft seat (12) radially outwards through the cavity.