Bearing Tube Blower Structure for Precise Rotor Alignment
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Solution Overview
Problem
Existing blower designs face challenges in achieving precise axial alignment of bearings, leading to compromised performance due to manufacturing precision limitations and the need for efficient packaging of rotating components.
Innovation Solution
The blower design incorporates a stationary portion with a housing, stator component, and tube providing an interior surface for bearing alignment, along with a rotating portion supported by bearings along the tube's interior surface, ensuring accurate bore-to-bore and bearing-to-bearing alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If bearings are held in separate housing structures and fitted together to approximate coaxial arrangement, then packaging flexibility is improved, but bearing alignment precision deteriorates due to tolerance build-up at faying surfaces
Solution Approach 1:
The patent merges the bearing support function into a single integrated housing structure rather than using separate housing structures fitted together. This single housing structure directly supports both bearings in coaxial arrangement, eliminating the faying surfaces and associated tolerance build-up that would compromise bearing alignment precision.
2Manufacturing precision
If manufacturing precision is increased to achieve better bearing alignment, then bearing performance is improved, but manufacturing cost increases
Solution Approach 1:
By consolidating bearing support into a single housing structure, the patent reduces the number of precision-critical interfaces. The single housing structure requires precision only at the bearing mounting locations rather than at multiple faying surfaces, thereby achieving good bearing alignment without requiring excessively high manufacturing precision across multiple components, thus controlling manufacturing cost.
3Manufacturing precision
If a single housing structure supports both bearings, then bearing alignment precision is improved, but device complexity increases
Solution Approach 1:
The single housing structure performs multiple functions: it supports both bearings, provides structural enclosure, and establishes the coaxial alignment reference. By making the housing multi-functional, the patent avoids the need for additional separate components that would increase device complexity, thereby achieving good bearing alignment without excessive complexity.
Data Source
AI summary
A blower includes a stationary portion including an inlet and an outlet, a rotating portion provided to the stationary portion, and a motor adapted to drive the rotating portion. The inlet and outlet are co-axially aligned. The stationary portion includes a housing, a stator component provided to the housing, and a tube providing an interior surface. The rotating portion includes one or more bearings that are provided along the interior surface of the tube to support a rotor within the tube. In an embodiment, the blower is structured to supply air at positive pressure.