Rotating Part Balancing with Piezoelectric Stick-Slip Mass Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing balancing devices for rotating parts are complex, prone to wear, and difficult to miniaturize due to high operational speeds and forces, making them costly and unreliable.
Innovation Solution
A balancing device featuring eccentric masses and stick-slip motors, with piezoelectric elements and elastic return means, allows for precise and robust imbalance correction without complex rotational motors, enabling operation at high speeds and reducing wear through innovative mechanical and electrical design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional electric motors and mechanical connections are used to move balancing masses, then the center of mass can be adjusted, but the device becomes complex and subject to wear
Solution Approach 1:
The patent replaces traditional electric motors and complex mechanical connections with a magnetic field-based system. Magnets are used to attract and hold balancing masses at different radial positions without physical mechanical connections, thereby reducing device complexity and wear while maintaining the ability to adjust the center of mass.
Solution Approach 2:
The patent extracts and eliminates the complex motor and transmission mechanisms from the balancing device. By using a simplified magnetic actuation system, the essential function of moving balancing masses is achieved without the distorting complex mechanical components.
2Reliability
If traditional balancing devices are used, then imbalance can be corrected, but the device is very subject to wear due to high speeds
Solution Approach 1:
The patent replaces mechanical contact-based mass movement mechanisms with a magnetic field system. This eliminates friction and mechanical wear that occur at high rotational speeds, significantly improving the durability and service life of the balancing device while maintaining effective imbalance correction.
3Measurement precision
If complex balancing systems are used, then precise control is achieved, but miniaturization becomes difficult
Solution Approach 1:
The patent uses a magnetic field-based actuation system that requires no complex mechanical transmissions or large motor assemblies. This allows the balancing device to be miniaturized while maintaining precise control capability, as the magnetic system can be scaled down without the same geometric constraints as mechanical systems.
Solution Approach 2:
The patent integrates the balancing masses directly into the rotating structure, eliminating separate drive mechanisms. The magnetic actuation system is combined with the mass positioning function, reducing the overall volume required for the balancing device while maintaining precision.
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 provides a simple, precise, and cost-effective balancing device capable of operating at high speeds, minimizing wear and complexity, while maintaining precise control over the center of mass, thus effectively addressing the limitations of existing technologies.
Implementation Method 1
The balancing device (1) comprises an active portion (30), constrained to the motor element (35)
Implementation Method 2
elastic return means (32), capable of bringing, in the absence of other external stimuli, the active portion (30) to an initial position
Implementation Method 3
stick-slip motors, with piezoelectric elements and elastic return means
Data Source
Figure 1~3
Figure 2
Figure 4a~4d
AI summary
It is provided a balancing device (1) for each rotating part (100), the rotating part (100) defining a rotation axis (100a), the balancing device (1) defining a central axis (1a) and being constrained to the rotating piece (100) so that the central axis (1a) substantially coincides with the rotation axis (100a), and comprising: at least one eccentric mass (2) rotatable around the central axis (1a) and not balanced with respect to the central axis (1a), at least one balancing motor (3), of the stick-slip and/or piezoelectric type able to rotate the eccentric mass (2), with respect to the rotating part (100) around the central axis (1a).