Spherical Pendulum Damping for Multi-Directional Tower Vibration
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Solution Overview
Problem
Existing vibration damping systems for tall, slender structures like wind turbines are limited in their ability to dampen vibrations in all directions effectively, as they are designed to address vibrations primarily in one spatial direction, and this can lead to inefficiencies and wear due to changing load directions.
Innovation Solution
A vibration damping arrangement that utilizes a spherical conductor arrangement and a magnetic field generating device moving in a circular motion around a pivot point, maintaining a constant distance and air gap, allowing for damping in all directions parallel to gravity, with adjustable magnet modules and a cleaning device to prevent contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional vibration damping system is designed to address vibrations primarily in one spatial direction, then the damping effectiveness in that specific direction is improved, but the system becomes inefficient and introduces wear when load directions change
Solution Approach 1:
The patent employs a spherical conductor arrangement that rotates about a pivot point, allowing the magnetic field generating device to maintain a constant distance and air gap from the conductor surface regardless of the pendulum's angular position. This spherical geometry enables effective vibration damping in all radial directions parallel to gravity, resolving the contradiction between directional effectiveness and multi-directional adaptability
Solution Approach 2:
The system implements a dynamically adjustable configuration where the magnetic field generating device rotates with the pendulum, maintaining optimal alignment with the conductor arrangement throughout the motion range. This dynamic adaptation ensures consistent damping performance across varying load directions without introducing mechanical wear
2Device complexity
If the distance between the conductor arrangement and the magnetic field generating device varies during pendulum movement, then the system structure is simplified, but the damping consistency is reduced due to changing air gaps
Solution Approach 1:
By positioning the pivot point at the center of curvature of the spherical conductor arrangement, the system ensures that the magnetic field generating device maintains a constant distance from the conductor surface throughout the pendulum's angular displacement. This geometric arrangement eliminates the need for complex guidance mechanisms while preserving damping consistency
Solution Approach 2:
The spherical configuration creates an equipotential geometric relationship where all points on the conductor surface remain at equal distance from the magnetic field generating device during rotation, ensuring uniform air gap and consistent magnetic coupling throughout the motion range
3Reliability
If additional guidance measures are implemented to maintain constant distance, then damping consistency is improved, but wear parts are introduced between the magnetic field generating device and the conductor arrangement
Solution Approach 1:
The spherical conductor arrangement with the pivot point at its center of curvature enables contactless operation throughout the entire pendulum movement range. The geometric configuration naturally maintains constant distance without requiring physical guidance contacts, thereby achieving damping consistency without introducing mechanical wear parts
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
This solution ensures consistent vibration damping across the entire length of the pendulum movement without introducing additional disturbances, reducing wear and maintaining efficiency regardless of changing load directions, while allowing for adjustable damping and protection against mechanical and corrosion damage.
Implementation Method 1
The vibration damping arrangement works on the principle of eddy current damping. When the magnetic field generating device moves relative to the conductor arrangement, the magnetic field of the magnetic field generating device induces eddy currents in the conductor arrangement, which are converted into heat due to the ohmic resistance of the conductor arrangement.
Implementation Method 2
When the magnetic field generating device moves relative to the conductor arrangement, the magnetic field of the magnetic field generating device induces eddy currents in the conductor arrangement
Implementation Method 3
the magnetic field of the magnetic field generating device induces eddy currents in the conductor arrangement, which are converted into heat due to the ohmic resistance of the conductor arrangement
Data Source
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AI summary
A vibration damping arrangement (1) is described, comprising a pendulum (2) mounted to pivot at a pivot point (3), a magnetic field generating device, and a conductor arrangement (9) located within the magnetic field of the magnetic field generating device, wherein either the magnetic field generating device or the conductor arrangement (9) is attached to the pendulum (2). The aim is to enable the damping of vibrations in all directions in a tall and slender structure. For this purpose, the pendulum (2) is mounted to pivot at the pivot point (3) to pivot in two spatial directions, and the conductor arrangement (9) is spherically shaped.