Blower Impeller Boss Structure Reducing Radial Deformation
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Solution Overview
Problem
Conventional boss structures for blower impellers, which use vibration isolation members to reduce motor vibrations, suffer from deformation under external forces, leading to increased vibration and noise, and compromised impeller strength due to radial direction displacement of these members.
Innovation Solution
A boss structure that sandwiches a vibration isolation member between two bosses, with the first boss supporting the inner cylinder and the second boss supporting the outer cylinder, forming a space that houses the vibration isolation member, allowing for integral molding with the hub, thereby reducing radial deformation and enhancing impeller strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the hub is fixedly attached to the outer peripheral portion of the boss via the vibration isolation member, then the effect of reducing vibration from the motor is improved, but the vibration isolation member deforms under external force, causing increased vibration and noise
Solution Approach 1:
The boss is divided into a first boss and a second boss that are separated by the vibration isolation member. This segmentation allows the vibration isolation member to be sandwiched between the two bosses, providing stable support from both sides and preventing deformation while still isolating motor vibrations effectively.
2Object-affected harmful factors
If the vibration isolation member is used to reduce motor vibration, then motor vibration is reduced, but deformation of the vibration isolation member in the radial direction increases impeller vibration and reduces impeller strength
Solution Approach 1:
The first boss and second boss are positioned at specific locations on opposite sides of the vibration isolation member to provide localized support. This local quality approach ensures that the vibration isolation member is supported where needed most (at both radial faces) to prevent radial deformation that would compromise impeller strength, while still maintaining vibration isolation properties.
3Object-affected harmful factors
If the hub is fixedly attached via vibration isolation member, then motor vibration is reduced, but the structure becomes more complex with separate components
Solution Approach 1:
The first boss and second boss are integrally formed as a single piece, merging two boss structures into one component. This reduces the total number of parts and simplifies manufacturing while maintaining the functional separation needed to sandwich and support the vibration isolation member effectively.
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 reduces radial deformation of the vibration isolation member by approximately half, improving the strength of the impeller and facilitating easier manufacturing through integrated molding of the vibration isolation member with the bosses and hub.
Implementation Method 1
a vibration isolation member that sandwiches the cylindrical portion from both sides in a radial direction
Implementation Method 2
the first boss and the second boss form a space that houses the vibration isolation member and sandwiches the cylindrical portion of the hub
Implementation Method 3
the rubber material can, in a state where the cylindrical portion of the hub has been disposed in a predetermined position in this space, be injected into or fill the space and be vulcanization-molded
Implementation Method 4
in a case where the vibration isolation member comprises a resin material that has elasticity, the resin material can, in a state where the cylindrical portion of the hub has been disposed in a predetermined position in this space, be injected into or fill the space and be insert-molded
Data Source
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AI summary
To provide a boss structure of an impeller of a blower that is capable of improving the strength of the impeller and an impeller of a blower equipped with the boss structure. A boss structure (1) is a boss structure to which a rotating shaft (106) of a motor (105) that drives an impeller (100) of a blower to rotate is pivotally attached, and the boss structure (1) comprises: a hub (10) that includes a cylindrical portion (12) that extends in the rotating shaft direction; a vibration isolation member (20) that sandwiches the cylindrical portion (12) from both sides in a radial direction; a first boss (31) that supports a portion of the vibration isolation member (20) that contacts one radial direction side of the cylindrical portion (12), the rotating shaft (106) being pivotally attached to the first boss (31); and a second boss (32) that supports a portion of the vibration isolation member (20) that contacts the other radial direction side of the cylindrical portion (12), the second boss (32) integrally rotating with the first boss (31).