Laser Dynamic Balancing of Rotational Bodies for Low Vibration
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Solution Overview
Problem
Conventional balancing processes for rotational bodies, such as motor housings in electric motors, face challenges in achieving precise imbalance correction without mechanical forces, especially in compact designs where noise reduction and high rotational speeds are critical, leading to potential damage and reduced product lifetime.
Innovation Solution
A method using a laser beam to dynamically balance rotational bodies by removing or adding material based on imbalance detection, allowing for precise correction of unsymmetrical mass distribution without additional mechanical forces, utilizing laser removal and additive application techniques to achieve high balancing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional balancing processes are used to correct imbalance, then imbalance correction is achieved, but mechanical forces cause vibrations and noise that increase with rotational speed
Solution Approach 1:
The patent replaces conventional mechanical balancing forces with a laser-based system. The laser beam acts on the rotational body to generate balancing forces without physical contact, eliminating mechanical vibrations and noise while achieving precise imbalance correction through optical energy interaction with the material surface.
Solution Approach 2:
The patent changes the physical state and parameters of the rotational body by using laser energy to locally heat, melt, and vaporize material. This transforms the mass distribution through controlled material removal or deposition, achieving imbalance correction by modifying material parameters (temperature, phase, mass) rather than applying mechanical forces.
2Volume of moving object
If high rotational speeds are used to achieve compact motor design, then installation space is reduced, but imbalance forces increase causing potential damage and reduced lifetime
Solution Approach 1:
The patent performs dynamic balancing before the rotational body enters high-speed operation. By correcting imbalance while the component is still in the balancing device at lower speeds, the system prevents the development of damaging imbalance forces during high-speed operation, ensuring reliability without sacrificing compact design.
Solution Approach 2:
The patent employs a feedback mechanism where imbalance is measured during rotation, and laser correction is applied based on real-time measurement data. This closed-loop control continuously monitors and adjusts the balancing state, ensuring that even at high rotational speeds, imbalance forces remain within safe limits for reliable operation.
3Manufacturing precision
If material is removed or added to correct imbalance, then unsymmetrical mass distribution is corrected, but additional mechanical forces act on the rotational body
Solution Approach 1:
The patent substitutes mechanical material removal or addition processes with a laser-based system. The laser beam delivers energy to the material surface, causing controlled phase changes and material ejection through thermal processes rather than mechanical cutting or pressing, thereby correcting mass distribution without applying significant mechanical forces to the rotational body.
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 method enables accurate and efficient dynamic balancing of rotational bodies, reducing vibrations and noise, while minimizing energy input and heat distortion, allowing for uniform production and extended product lifetime by integrating balancing and measurement processes.
Implementation Method 1
The laser beam is radiated in a continuous or pulsed manner onto the rotational body in order to realise the imbalance compensation by removing material from the rotational body by way of vaporisation and ablation
Implementation Method 2
The laser beam is radiated in a continuous or pulsed manner onto the rotational body in order to realise the imbalance compensation by removing material from the rotational body by way of vaporisation and ablation
Implementation Method 3
by applying additional material to the rotational body, in particular by melting and applying metal or plastic
Implementation Method 4
The laser beam is radiated in a continuous or pulsed manner onto the rotational body
Data Source
AI summary
A method dynamically balances a rotational body. First, the rotational body is set into rotation and then an imbalance of the rotational body is determined. According to the determined imbalance, material of the rotational body is removed and/or additional material is applied to the rotational body. The removal and/or the application is carried out by a laser beam of a laser.