Wind Turbine Noise Reduction via Vibration Damping Techniques

Vibration absorber for generator stators to reduce vibrations in large turbine generators. The absorber uses the principle of a dynamic vibration absorber. It attaches to the generator stator housing and has a support base, vibration absorbing elastic plates, a counterweight cavity, and a counterweight block. The absorber has the same natural frequency as the generator to effectively reduce stator vibrations.

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Vibration and noise reduction device for wind turbines that mitigates the high-frequency vibrations and noise generated by wind turbine generators. It uses a base in the nacelle, a damping chamber filled with non-Newtonian fluid, a sliding linkage connecting to the turbine, and an elastic component between the linkage and base. The fluid-filled chamber and elastic component absorb and dissipate vibrations and noise from the turbine to reduce transmission to other equipment in the nacelle.

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Using tuned mass dampers to reduce fatigue in wind turbine nacelles by targeting low frequency vibrations below 50 Hz. The dampers are attached to the nacelle structure and tuned to specific motion modes in this frequency range. They absorb and dissipate the energy of those vibrations to reduce nacelle displacement and fatigue compared to just adding reinforcement. This addresses life-shortening periodic vibrations caused by external loads like wind, closing events, and seismic events.

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Vibration damping device for wind turbine generators to mitigate vibrations and reduce damage to other components like gearboxes. The device consists of a damping box with a top cover attached to the generator. Below the cover, a vibration damping assembly with a spring and a shock absorber block is sandwiched between the box and the limiting groove. The shock absorber block has fan-shaped grooves in its side walls to further dampen vibrations. This setup allows vibrations from the generator to be transmitted through the top cover to the spring and shock absorber block, weakening them before reaching the gearbox.

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Vibration and noise reduction device for wind turbine generators to mitigate vibrations and noise from the high-speed rotating generator. The device consists of a base, a sliding shell around the generator, a vibration damping assembly between the base and shell, and a sound insulation assembly between the base and nacelle or shell and generator. This isolates the generator vibrations and noise from the turbine structure, reducing vibrations and noise transmission.

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Reducing noise from small-scale wind turbines by using a multi-modal approach involving multiple noise suppression materials targeted at specific sources and frequencies. The system includes acoustic fencing inside the tower to mitigate column and conical resonance, vibration isolation pads and mounts to suppress solid material transmission, and sound-absorbing batting to reduce airborne transmission. This comprehensive approach aims to reduce noise levels below regulatory guidelines and address social determinants of health concerns related to wind turbine noise.

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A vibration damping device for wind turbine generators that reduces vibrations and extends the life of wind power generation equipment. The device uses a circular housing with multiple radial shock absorbers around the perimeter. Each shock absorber has a ball hinge and vibration guide plate on the outer end. The generator body fits inside the housing and is clamped by the guide plates. This dampens vibrations in multiple directions. The housing and base have vibration damping components to further isolate the generator. The design allows adjustment of the damper pressure.

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Reducing noise and vibrations generated by wind turbines to mitigate their impact on nearby residents and wildlife. This involves improving the soundproofing of the tower to reduce harmful low frequency sounds and vibrations like infrasound. By reducing the propagation of these frequencies through the tower, it can help minimize the disturbance to people and animals in the surrounding area.

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Reducing noise from vertical axis wind turbines in built environments. The invention involves a sound attenuation arrangement for vertical axis wind turbines installed in urban areas. The arrangement includes fixed stator elements around the turbine rotor. These elements have sound absorbing material to dampen noise. The turbine, with its fixed stator elements, is installed in a structure like a building. This provides additional sound attenuation from the turbine. It aims to significantly reduce noise from vertical axis wind turbines in built environments.

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A wind power generation system that uses vibration control to reduce costs and improve reliability by suppressing vibrations without adding external dampers. The system has converters and transformers inside the nacelle, separated by safe vibration zones. Vibration control is achieved by adjusting the stiffness of elastic elements and applying voltages that vary the currents through electromagnetic elements. This allows targeted vibration damping of individual components without adding external dampers, improving overall vibration suppression and extending equipment life.

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Reducing noise and vibrations of wind turbines to minimize disturbance to nearby marine life like whales. The solution is to insulate the wind turbine tower to prevent harmful sounds and vibrations from being transmitted through the tower as the rotor blade passes by. This addresses the issue of offshore wind turbines disrupting marine life like whales due to the blade's noise and vibrations as it passes the tower.

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Wind turbine generator vibration isolation device with inertial decoupling to reduce vibrations and improve performance. The device has a protective casing with internal vibration isolation structures. It contains vertical, lateral, and longitudinal inertial capacities that are vertically stacked inside the case. These capacities isolate and decouple vibrations in the three directions. The stacked inertial capacities are connected internally to fix and support the structures inside the case. This provides three-way decoupling of vibrations that can occur in different directions.

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Three-way decoupling wind turbine generator vibration isolator and optimization design method to reduce generator vibrations in horizontal, vertical, and longitudinal directions. The isolator has separate vibration isolators in each direction to decouple vibrations. It uses a rubber-metal composite ring between the generator and frame, with isolators in all directions. By optimizing the isolator parameters like stiffness, mass, and damping, the vibration levels can be further reduced.

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Vibration damping support for reducing vibrations and impacts in wind turbines. The support has a shell with damping assemblies inside. It connects equipment to the turbine. The damping assemblies absorb vibrations and impacts transmitted through the equipment and adapter. A snap plate connects the adapter to the shell to directly transmit vibrations to the damping assemblies. A bottom vibration damping sleeve further absorbs vibrations at the shell-turbine connection. This provides multiple stages of vibration reduction.

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Gearbox vibration damping device for wind turbines that reduces vibrations and prevents damage to the gearbox. It uses a support assembly, vibration seats, and springs to isolate the gearbox from the turbine's main body. The support plate attaches to the turbine housing. The gearbox sits on a vibration seat with a spring. Another seat below has a spring and bolt to secure the gearbox. This setup allows the gearbox to move downward under force, preventing excessive vibration.

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Bionic trailing edge wind turbine blade design to reduce noise and vibrations. The design involves adding a whale tail fin-shaped flap at the base airfoil blade trailing edge that can be adjusted based on the separation point position. The flap is symmetrically distributed on both sides of the blade suction surface and pressure surface. This bionic trailing edge modification mimics the shape of whale tails and aims to reduce noise and vibrations during wind turbine operation.

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Vibration damping system for wind turbines using viscoelastic materials to improve fatigue life and reduce maintenance costs. The system involves adding viscoelastic links between structural components of the turbine, like the tower and blades, to damp vibrations. The viscoelastic materials store and convert strain energy into heat, reducing vibration amplitude. The links are chosen based on the temperature range of the turbine area to optimize damping effectiveness.

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Method to dampen vibrations of wind turbine towers and nacelles during construction when the turbine can't be completed. Vibration attenuators are temporarily installed on the nacelle to counteract vibrations caused by eddy currents in the tower due to wind. The attenuators are connected to the nacelle main shaft or transport interface. This allows damping of specific frequencies like the tower's fundamental mode around 0.1 Hz. The attenuators can be passive or adjustable before installation.

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A wind turbine tower vibration damping device to reduce tower vibrations and improve tower stability in tall wind turbines. The damping device is mounted between the tower and nacelle. It consists of a base fixed to the tower top, a spring connecting the base to the nacelle, and a sliding seat on the spring. The seat has guide posts and a nut. The seat can slide on the guides to limit nacelle movement. The spring provides vibration damping. The sliding seat allows adjustment to prevent excessive nacelle motion. This customizable damping setup reduces tower vibrations and prevents fatigue and cracking compared to fixed dampers.

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Wind turbine tower vibration damping device to reduce vibrations in tall wind turbines. The device is installed between the tower and nacelle to absorb and dissipate vibrations. It uses springs and guide posts with nuts to connect the damping base on the tower to the nacelle. The nacelle can slide on the posts but the nuts limit movement to prevent separation during extreme vibrations. This allows the damping springs to compress and release, reducing tower vibrations.

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