Blower Rotor Impeller Axial Clamping Rigidity
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Solution Overview
Problem
Conventional blower devices with detent connections face challenges in securely fixing the impeller and rotor due to varying operating forces and environments, necessitating a more rigid attachment method.
Innovation Solution
A blower device design featuring a rotor with a flange and annular ring configuration, where the impeller is attached to the rotor using an annular impeller base and ring member, with the flange held between the impeller base and ring in the axial direction, providing enhanced rigidity through connection methods like welding or adhesive bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If detent connection is used to attach impeller to rotor, then the structure is simple and easy to manufacture, but the connection strength is insufficient under large operating forces
Solution Approach 1:
The connection structure is divided into multiple components: the rotor hub with external threads, the impeller base with internal threads, and the annular ring as a locking element. This segmentation allows each component to perform its specific function while collectively providing strong connection
Solution Approach 2:
The impeller base is nested within the rotor hub, with the annular ring positioned between them axially. The flange extends radially outward from the rotor cylindrical portion and is held between the impeller base and ring, creating a nested configuration that maximizes connection strength
2Reliability
If detent connection is used to attach impeller to rotor, then the assembly process is simple, but the reliability under varying operating conditions is insufficient
Solution Approach 1:
The rotor hub is pre-formed with external threads during manufacturing, and the impeller base is pre-formed with internal threads. This preliminary action ensures that the threaded connection is already prepared before assembly, improving reliability without significantly increasing assembly complexity
Solution Approach 2:
The annular ring acts as an intermediary element between the impeller base and the rotor hub, providing additional locking and securing the connection. This intermediary component enhances reliability by distributing forces across multiple contact points
Data Source
AI summary
A blower device includes a rotor rotatable about a central axis extending in a vertical direction, an impeller attached to the rotor, and an annular ring centered on the central axis. The rotor includes a rotor cylindrical portion that extends in the axial direction and a flange that extends radially outward from the rotor cylindrical portion. The impeller includes an annular impeller base centered on the central axis. The ring is connected to the impeller base in the axial direction. The flange is held between the impeller base and the ring in the axial direction.