Cushioning Element for Electric Machine Bearing Axial Protection
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Solution Overview
Problem
Electric machines with rotors and stators are prone to irreversible damage from axial loading, especially during transportation and handling, leading to premature failure due to complex and costly prevention measures.
Innovation Solution
A cushioning element is integrated into the bearing system to absorb axial loading, reducing axial play and wear, and converting kinetic energy into deformation and heat, thereby protecting the electric machine from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If special work instructions and employee training are implemented to prevent bearing damage, then reliability is improved, but device complexity increases
Solution Approach 1:
A cushioning element is integrated into the bearing bracket to absorb axial impacts before they reach the bearing. This preventive measure eliminates the need for complex handling instructions and training by providing passive protection that automatically activates during impact events.
Solution Approach 2:
The cushioning element acts as an intermediary between the bearing bracket and the bearing, absorbing and dissipating impact energy. This mediator protects the bearing from direct damage without requiring changes to handling procedures or additional monitoring systems.
2Reliability
If complex packing measures are used to prevent transportation damage, then reliability is improved, but device complexity increases
Solution Approach 1:
The cushioning element provides built-in protection against transportation impacts, eliminating the need for complex external packing solutions. The element is permanently integrated into the bearing bracket, providing continuous protection without adding packaging layers or special handling requirements.
Solution Approach 2:
The cushioning function is merged with the bearing bracket structure itself, combining protection and support functions into a single integrated component. This eliminates the need for separate packing elements and simplifies the overall system.
3Reliability
If the mounting position is optimized to compensate for fast axial acceleration, then reliability is improved, but device complexity increases
Solution Approach 1:
The cushioning element provides passive protection against fast axial acceleration by absorbing impact energy regardless of mounting orientation. This eliminates the need for specific mounting position requirements and allows flexible installation in various orientations.
Solution Approach 2:
The cushioning element dynamically responds to axial acceleration forces by deforming to absorb energy, then returning to its original position. This dynamic behavior provides continuous protection without requiring active control systems or specific mounting configurations.
4Reliability
If bearing replacement is performed to fix transportation damage, then reliability is improved, but loss of time increases
Solution Approach 1:
The cushioning element prevents bearing damage during transportation before it occurs, eliminating the need for subsequent bearing replacement. This preventive approach avoids complete machine downtime and maintains continuous operation.
Solution Approach 2:
The cushioning element converts harmful impact energy into deformation energy of the cushioning material itself, protecting the bearing from damage. This transforms potentially destructive forces into a harmless deformation process that preserves bearing integrity.
5Reliability
If a cushioning element is added to absorb axial loading, then reliability is improved, but device complexity increases
Solution Approach 1:
The cushioning element is integrated into the bearing bracket structure, combining the support function of the bracket with the protection function of the cushioning element. This merging reduces the number of separate components and simplifies the overall bearing system.
Solution Approach 2:
The cushioning element serves multiple functions: absorbing axial impacts, reducing axial play, and protecting the bearing from damage. This multi-functionality eliminates the need for separate components for each function, maintaining simplicity while providing comprehensive protection.
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 solution effectively minimizes the consequences of axial loading, increases the lifespan of the bearings, reduces noise, and simplifies the protection of electric machines by absorbing impact energy, ensuring reliable operation.
Implementation Method 1
the cushioning element helps reduce the loading on the bearing system by converting kinetic energy to deformation energy
Implementation Method 2
converting the energy supplied into heat
Implementation Method 3
This results in lower wear levels, thereby increasing the life of the bearings
Data Source
AI summary
To prevent damage to an electric machine (1), for example in a motor vehicle, due to axial loading of the rotor bearing in a simple manner, a cushioning element (11, 18, 22, 27) is proposed to absorb axial loading of the bearing system (6, 7), thereby also reducing the axial play (8) of the bearing system (6, 7). When the bearing system (6, 7) is axially loaded, the cushioning element (11, 18, 22, 27) serves to convert kinetic energy into deformation energy.