Detachable Fan Assembly With Marked Alignment for Dynamic Balance
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Solution Overview
Problem
In reflow ovens, existing fan assemblies face challenges in maintaining dynamic balance and secure connections between the motor and impeller, especially when the sealing device, such as a graphite gasket, needs to be replaced.
Innovation Solution
The fan assembly incorporates a motor and impeller with positioning marks for easy alignment and dynamic balance, along with a sealing device and fastener assembly that allows for the replacement of the graphite gasket without re-adjusting the dynamic balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the sealing device (graphite gasket) is made replaceable, then ease of repair is improved, but dynamic balance may be compromised upon remounting
Solution Approach 1:
Positioning marks are pre-established on both the motor shaft and impeller before assembly. These marks serve as preliminary alignment references that guide the reassembly process, ensuring the impeller is returned to its original balanced position after sealing device replacement without requiring complex rebalancing procedures.
2Ease of operation
If the impeller is detachably connected to the motor, then ease of operation for sealing replacement is improved, but connection reliability may deteriorate
Solution Approach 1:
The connection system is segmented into modular components: the impeller can be detached from the motor shaft for sealing replacement, yet positioning marks and fastening structures ensure reliable reconnection. This segmentation allows maintenance access while maintaining operational reliability through precise realignment features.
Data Source
AI summary
The present application provides a fan assembly. this fan assembly is characterized by: a motor and an impeller, the motor having a motor body and a motor shaft extending from the motor body, a distal end of the motor shaft having a first positioning mark with a certain spacing from 5 a central axis of the motor shaft, the distal end of the motor shaft having an end surface, the first positioning mark being at least partially visible on the end surface, the impeller having an impeller center bore, and a second positioning mark being provided on the impeller, where when the motor shaft is inserted into the impeller center bore, and the central axis of the motor 10 shaft, the second positioning marker and the first positioning marker are on a same diameter of the fan assembly, the impeller is mounted in place in a radial direction relative to the motor so that the fan assembly reaches dynamic balance during operation. The impeller and the motor in the present application are detachable.