Centrifugal Blower Stator Housing Vibration and Heat Dissipation
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Solution Overview
Problem
Centrifugal blowers face challenges in reducing vibration and noise while effectively dissipating heat, as existing designs often compromise between vibration reduction and heat dissipation due to the direct fixation of the stator to the casing.
Innovation Solution
The design incorporates a stator housing with radial, circumferential, and axial contact surfaces that increase the contact area with the casing, allowing for efficient vibration reduction and heat dissipation through a wind tunnel, using materials like aluminum for enhanced heat dissipation and reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the stator is directly fixed to the casing, then the structure is simple and easy to manufacture, but vibration and noise increase due to direct transmission of stator vibration to the casing
Solution Approach 1:
A vibration reduction member is introduced as an intermediary component between the stator and the casing. This member includes a stator fixing portion that contacts the stator and a casing fixing portion that contacts the casing, creating a buffer zone that reduces vibration transmission while maintaining structural simplicity and ease of assembly.
2Object-affected harmful factors
If another member is interposed between the stator and casing to reduce vibration, then vibration and noise are reduced, but heat dissipation becomes difficult due to reduced thermal contact
Solution Approach 1:
The vibration reduction member is designed to perform multiple functions simultaneously: it reduces vibration through its buffer structure while also serving as a heat dissipation path through thermally conductive material and extended heat dissipation surfaces that extend into the gas flow path, allowing heat to be efficiently transferred from the stator to the surrounding environment.
Solution Approach 2:
The vibration reduction member includes heat dissipation surfaces that extend radially outward into the gas flow path, adding a third dimension to heat dissipation. This allows heat to be dissipated not only through contact with the casing but also directly into the moving gas stream, significantly enhancing heat dissipation capability.
3Object-affected harmful factors
If the stator housing contact area with casing is increased, then vibration reduction improves, but device complexity increases due to multiple contact surfaces required
Solution Approach 1:
The vibration reduction member integrates multiple contact functions into a single component. It combines the stator fixing portion, casing fixing portion, and heat dissipation functions into one unified structure, reducing the number of separate parts and assembly steps while achieving comprehensive vibration reduction through multiple contact surfaces.
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
This configuration effectively suppresses vibration and noise while ensuring efficient heat dissipation, improving the operational reliability and quietness of the blower, particularly in medical applications like artificial respirators.
Implementation Method 1
a heat dissipating surface exposed to the wind tunnel
Implementation Method 2
efficiently dissipate the heat generated in the stator from the heat dissipating surface of the stator housing to the gas existing within the wind tunnel
Implementation Method 3
a stator disposed radially outward of the rotor and arranged to generate rotating magnetic fields between the stator and the rotor
Data Source
AI summary
A centrifugal blower includes a stator housing. The stator housing includes a radial contact surface which makes contact with a casing in a radial direction, a circumferential contact surface which makes contact with the casing in a circumferential direction, and an axial contact surface which makes contact with the casing in an axial direction. With such configuration, it is possible to reduce the vibration of the blower by increasing a contact area between the casing and the stator housing. Further, the stator housing includes a heat dissipating surface. As a result, it is possible to efficiently dissipate the heat, which is generated from the stator, from the heat dissipating surface of the stator housing to the gas existing within the wind tunnel.