Belt-Driven Rotating Vibration Absorber for Icy Conditions
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Solution Overview
Problem
Existing vibration absorbers for wind turbines and tall buildings face challenges in effectively damping vibrations, especially under wet or icy conditions, due to issues with friction and wear, which affect the damping efficiency and fine-tuning of natural frequencies.
Innovation Solution
A rotating vibration absorber with a belt drive system, where the rotating flywheel mass is driven independently of the guide wheels, positioned below the curved running device, allowing for improved damping and frequency adjustment even in adverse weather conditions, and incorporating an eddy-current damper for enhanced vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drive wheels move on the running device (rails) to drive the rotating flywheel mass, then the flywheel can be driven, but under wet or icy conditions friction increases and wear occurs affecting damping efficiency
Solution Approach 1:
A belt is introduced as an intermediary element between the drive wheel and the running device. The belt transmits the driving force to the flywheel while being isolated from direct contact with the running device, thereby eliminating the harmful friction and wear that occur under wet or icy conditions.
Solution Approach 2:
The direct mechanical contact drive system (drive wheel on rails) is replaced with a belt-driven system. This substitution eliminates the friction-based mechanical contact while maintaining the driving function, resolving the issue of reduced damping efficiency under adverse weather conditions.
2Ease of operation
If guide wheels are used to move the running gear on the curved running device, then the running gear can be positioned, but the rotating flywheel mass cannot be driven independently
Solution Approach 1:
The drive system is segmented into two independent functions: guide wheels for positioning the running gear on the curved path, and a separate belt drive system for rotating the flywheel. This segmentation enables independent control of the flywheel rotation while maintaining the simplicity of the guiding mechanism.
3Reliability
If the center of gravity of the rotating flywheel mass is positioned above the running device, then the structure is simpler, but damping performance is reduced
Solution Approach 1:
The center of gravity of the rotating flywheel mass is positioned in a different vertical dimension (below the running device) rather than above it. This dimensional repositioning improves damping performance by optimizing the moment of inertia and rotational dynamics, while the belt drive system accommodates this new configuration.
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 belt drive system provides excellent damping properties and precise frequency tuning, even in wet or icy conditions, with reduced wear and maintenance compared to traditional solutions, ensuring effective vibration absorption across a wide range of frequencies.
Implementation Method 1
The belt drive system provides excellent damping properties and precise frequency tuning, even in wet or icy conditions, with reduced wear and maintenance compared to traditional solutions
Implementation Method 2
The rotating vibration absorber comprises a belt drive system, where the rotating flywheel mass is driven independently of the driving mechanism by means of a novel belt device
Data Source
AI summary
A vibration absorber which, in addition to a main mass which is fixed thereto and moved along a curved trajectory by a driving mechanism, comprises a substantially smaller variably adjustable rotating flywheel mass which is moved together with the main mass along the trajectory thereof, enabling the adjustment of the frequency of the absorber. The rotating flywheel mass is driven by a novel belt device independently of the driving mechanism. A rotating vibration absorber which, along with the main mass and the rotating flywheel mass, comprises its own damping unit, such as an eddy-current damping unit.