Impulse tuned mass damper for tall, slim structures
AssigneeEsm Energie-Und Schwingungstechnik Mitsch GmbH
InventorLukas Schneider
Life of this patent
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Abstract
An impulse damper device, which is specifically provided for the construction or the dismantling of tall, slim constructions, in particular towers and preferably towers of wind turbines, in order to minimize or eliminate undesired vibration states, which often occur during the construction or taking apart and lead to large increases in the vibration amplitudes of the vibration system. The impulse tuned mass dampers are preferably provided for temporary mobile use, but, in principle, are also suitable for permanent use.
Claims17
An impulse damper device for damping vibrations in an installation, which occur during construction or disassembly of a structure made of individual segments, said device comprising:
- (i) a fixed support device (2) having three or more support arms (2.2) that are interconnected at a first end while an opposite free end extends outward in a star shape with respect to one another and are arranged in a horizontal plane,
- (ii) a movable mass (3) comprising one or more parts is arranged above or below or between the two or more support arms (2.2) of the horizontally oriented support device (2), and the movable mass (3) is mounted movably relative to said support device,
- (iii) at least one sliding or rolling device (4) which is arranged and designed to allow relative movement between the support device (2) and the movable mass (3), and
- (iv) at least one stop device (7), provided for the movable mass (3) to hit the fixed support device (2), thereby causing the vibrations that have occurred in the installation to be reduced or eliminated by impulse damping by the mass being moved by applied forces hitting the fixed support device,
- wherein the stop device (7) is arranged such that:
- (a) the mass (3) cannot be rotated about a vertical axis of the impulse damper, as a result of which a torsional moment about the vertical axis is transmitted, and
- (b) said stop device is functionally effective in a tangential direction relative to a longitudinal axis of the structure.
A method for damping vibrations in a wind turbine during the construction or disassembly of a tower, a nacelle or rotor blades of the wind turbine, the method comprising
- (A) providing an impulse damper device that comprises
- a fixed support device (2) having three or more support arms (2.2) that are interconnected at a first end while an opposite free end extends outward in a star shape with respect to one another and are arranged in a horizontal plane,
- (i) a movable mass (3) comprising one or more parts is arranged above or below or between the two or more support arms (2.2) of the horizontally oriented support device (2), and the movable mass (3) is mounted movably relative to said support device,
- (ii) at least one sliding or rolling device (4) which is arranged and designed to allow relative movement between the support device (2) and the movable mass (3), and
- (iii) at least one stop device (7), provided for the movable mass (3) to hit the fixed support device (2), thereby causing the vibrations that have occurred in the installation to be reduced or eliminated by impulse damping by the mass being moved by applied forces hitting the fixed support device,
- wherein the stop device (7) is arranged such that:
- (a) the mass (3) cannot be rotated about a vertical axis of the impulse damper, as a result of which a torsional moment about the vertical axis is transmitted, and
- (b) said stop device is functionally effective in a tangential direction relative to a longitudinal axis of the structure, and
- (B) mounting said impulse damper device on an uppermost segment of the tower or on the nacelle during the assembly or disassembly of the wind turbine.
Dependencies are inferred from the claim text.