Compressed Annular Member for Stator Housing Vibration Isolation
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Solution Overview
Problem
Existing interposed members in assemblies with moving parts, such as stators and housings, face challenges with position control, including tight tolerances, complex assembly procedures, unwanted component vibration, and noise, as well as stiffness variation.
Innovation Solution
An annular member is radially compressed to exert outward and inward forces on the housing and stator, with a torsional stiffness less than three times its radial stiffness, incorporating a substrate layer and damping layer for improved position control and vibration isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional interposed members are used to constrain movement between stator and housing, then position control is achieved, but the assembly suffers from tight tolerances, complex assembly procedures, unwanted vibration, noise, and stiffness variation
Solution Approach 1:
The annular member's stiffness parameters are specifically designed with torsional stiffness k_tor ≤ 3×radial stiffness k_rad, creating an optimized stiffness ratio that simultaneously provides position control while reducing vibration and simplifying assembly compared to traditional interposed members
Solution Approach 2:
The annular member incorporates a composite structure with a substrate layer and a damping layer, where the damping layer (viscoelastic or polymeric material) provides vibration damping and noise reduction while the substrate layer provides structural support, resolving the contradiction between position control and vibration/noise reduction
2Manufacturing precision
If traditional interposed members are used to maintain positional relationship, then position control is achieved, but unwanted vibration and noise occur
Solution Approach 1:
The annular member incorporates a composite structure with a substrate layer and a damping layer, where the damping layer (viscoelastic or polymeric material) provides vibration damping and noise reduction while the substrate layer provides structural support, resolving the contradiction between position control and vibration/noise reduction
Solution Approach 2:
The specific stiffness ratio parameter (k_tor ≤ 3×k_rad) is designed to optimize the balance between maintaining positional relationship and minimizing vibration transmission, allowing position control while reducing harmful vibrations and noise
3Stability of the object's composition
If rigid interposed members are used to maintain position, then position stability is improved, but stiffness variation occurs under varying conditions
Solution Approach 1:
The damping layer material properties (viscoelastic or polymeric) are selected to provide consistent stiffness characteristics across varying operating conditions, temperatures, and loads, while the optimized stiffness ratio (k_tor ≤ 3×k_rad) ensures stable positional relationship without excessive stiffness variation
Solution Approach 2:
The composite structure combining substrate layer and damping layer creates a material system that maintains stable mechanical properties under varying conditions, with the damping layer providing consistent damping characteristics that prevent stiffness variation while maintaining position stability
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
The annular member effectively maintains a positional relationship between the stator and housing, reducing unwanted vibration and noise while ensuring stable assembly under varying conditions.
Implementation Method 1
the annular member is radially compressed so as to exert a radial force outward onto the housing and inward onto the stator to maintain a positional relationship therebetween
Implementation Method 2
incorporating a substrate layer and damping layer for improved position control and vibration isolation
Data Source
Figure 1~2
Figure 3~4
Figure 5A~5B
AI summary
An electric motor or generator assembly includes a stator, a housing, and an annular member fit between the stator and the housing, where the annular member is radially compressed so as to exert a radial force outward onto the housing and inward onto the stator to maintain a positional relationship therebetween.