Connection Plate Pressing Element Vibration Detuning
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Solution Overview
Problem
Existing connection plates in electric machines, such as generators, experience undesirable natural vibrations due to resonance with excitation frequencies, leading to high vibration amplitudes, which are not effectively mitigated by current designs.
Innovation Solution
A connection plate with axially protruding pressing elements that deform elastically or plastically upon connection, creating local tension and altering vibration modes to higher natural frequencies, thereby detuning with excitation frequencies, and featuring deformation-free contact points to enhance stability and reduce vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the connection plate is made as a separate component connected to the stator, then the connection plate can be independently designed and manufactured, but the connection plate experiences undesirable natural vibrations due to resonance with excitation frequencies
Solution Approach 1:
The connection plate features localized pressing elements with different stiffness characteristics at specific positions. These pressing elements create localized tension zones that modify the vibration modes only in critical areas, allowing the rest of the connection plate to maintain its independent design benefits while reducing overall resonance.
Solution Approach 2:
The pressing elements are designed to deform elastically or plastically under connecting force, changing the local stiffness parameters of the connection plate. This deformation creates local tension that shifts the natural vibration frequencies away from excitation frequencies, thereby reducing resonance while maintaining the separate component structure.
2Reliability
If pressing elements are added to the connection plate to reduce vibrations, then the vibration capability is improved, but the structural complexity of the connection plate increases
Solution Approach 1:
The pressing elements are integrally formed with the connection plate as a single piece, combining the structural support function and the vibration control function into one component. This integration avoids the need for separate vibration control devices, reducing overall structural complexity while maintaining improved vibration capability.
Solution Approach 2:
The pressing elements serve multiple functions: they provide mechanical connection force, create local tension to modify vibration modes, and ensure proper positioning of the connection plate on the stator. This multi-functionality reduces the need for additional components, thereby limiting the increase in structural complexity.
3Object-affected harmful factors
If the pressing element deforms under connecting force, then local tension is created to reduce resonance, but the connecting force must be precisely controlled to avoid excessive deformation
Solution Approach 1:
The pressing elements are pre-designed with specific material properties and geometric dimensions that allow controlled elastic or plastic deformation within a predetermined range. This pre-engineering of deformation characteristics eliminates the need for precise real-time control of connecting force during assembly, as the deformation behavior is predetermined by the component design.
Solution Approach 2:
The pressing elements are designed to undergo controlled deformation as a one-time event during assembly, after which they maintain a stable deformed state. This approach accepts limited deformation as a acceptable trade-off for resonance reduction, without requiring reversible or precisely controllable deformation mechanisms that would increase manufacturing complexity.
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 reduces or prevents undesirable vibrations by changing the natural vibration frequencies of the connection plate, preventing resonance and associated high vibration amplitudes, thus improving the vibration capability of electric machines.
Implementation Method 1
The deformation occurs either in the plastic or in the elastic area of the material of the connection plate
Implementation Method 2
The deformation occurs either in the plastic or in the elastic area of the material of the connection plate
Implementation Method 3
undesirable natural vibrations of the connection plate. The local tension caused by the deformation of the pressing element on the connection plate changes the vibration modes, in particular, the natural vibration frequencies of the connection plate
Implementation Method 4
detuning with the excitation frequencies of the electric machine can be achieved. Accordingly, resonances in the connection plate, which otherwise lead to high vibration amplitudes, can be avoided
Data Source
AI summary
The invention relates to a connection plate for an electric machine, which can be connected to a stator or a stator-side component, wherein at least one axially protruding pressing element is integrally formed on the connection plate.