Multi-stage suspension damper for damping a structure

EP4532856A4Pending Publication Date: 2026-06-24ENGISO APS
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
ENGISO APS
Filing Date
2023-05-25
Publication Date
2026-06-24

AI Technical Summary

Technical Problem

As wind turbine towers increase in height, the natural frequency of the towers also rises, requiring longer pendulum lengths for suspension dampers, which reduces damping efficiency due to the pendulum mass being positioned further away from the tower top.

Method used

A multi-stage suspension damper design with interconnected frame structures and adjustable rods or cords allows for a shorter overall height, positioning the pendulum mass closer to the tower top, enhancing damping efficiency, and includes features like non-parallel rods or cords for frequency adjustment and impact damping for improved performance.

Benefits of technology

The multi-stage suspension damper effectively increases damping efficiency by positioning the pendulum mass closer to the tower top and provides frequency tolerance and enhanced damping through adjustable components and impact mechanisms, addressing the inefficiencies of traditional designs.

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Abstract

A wind turbine tower comprising a multi-stage suspension damper and a multi-stage suspension damper (1) for damping a structure, the multi-stage suspension damper (1) comprises - one or more frame structures (10) including an innermost frame structure (10I) comprising an innermost frame top part (12I) and an innermost frame bottom part (14I), wherein the innermost frame top part (12I) and the innermost frame bottom part (14I) are interconnected and define an innermost frame structure height (16I), wherein the innermost frame structure (10I) is suspended by three innermost rods (18I) or three innermost cords (18I) connected to the innermost frame bottom part (14I) and extending from another frame structure (10) of the one or more frame structures (10) or the three innermost rods (18I) or the three innermost cords (18I) are adapted to be connected to an object; - a pendulum (50) suspended by a pendulum rod (52) or a pendulum cord (52) from the innermost frame top part (12I), wherein the pendulum rod (52) or pendulum cord (52) is longer than the innermost frame structure height (16I), wherein the pendulum (50) comprises a pendulum mass.
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