One application used standard company products and a center-bonded mount. Center-bonded mounts have been used in turbines with generating capacities of 100 kW and smaller to isolate most equipment. For instance, isolators for small turbines are readily available, cost-effective, durable, and maintenance-free. Noise and vibration in smaller turbines are equally troublesome, but solutions differ. can be used in a variety of applications in the wind-power industry. Structural adhesives and passive motion control devices from Lord Corp. Side benefits to this solution include reduced drive-train noise and improved life of rotating component One solution to drivetrain component-life issues in similar equipment is to apply torsionally soft couplings to reduce variable torque and tune away harmful resonances. Rotating components in turbine drivetrains also present challenging reliability issues. Torque-restraining mounts that react to torque and provide isolation have also been considered. Large isolators provide a ‘soft’ attachment between the gearbox, nacelle, and tower structures to interrupt the noise path, reducing stress on large, expensive components, and eliminating critical vibration modes that could cause structural damage. Several manufacturers are focusing on ways to improve the operation of 1.5-MW versions, a size frequently found on today’s wind farms. Meshing gears, rotating components, and generators on the turbines also produce excess vibration and noise signatures in large, small, new, and old wind turbines. These should reduce vibration amplitude, lower structure-borne noise levels, and extend equipment life – all important to the wind industry. Gearboxes and generators inside the nacelle are often mounted on vibration isolators. Noise and vibration attenuation are key considerations driving a need for isolation systems that are easy to install, provide a long service life, and reduce the transmission of noise and vibration. Because nacelles are perched 200 to 300-ft up and at the end of a swaying tower, equipment mounts, often vibration isolators for the equipment in a nacelle, must work reliably for long periods to minimize maintenance. Untamed vibration shortens major component life, loosens bolts, causes weld failures, and contributes to gear and bearing failures. The good news for turbine OEMs and O&M crews is that there are a range of devices for controlling vibration. Their equipment is bolted to a large frame but vibration control is minimal. Ground-based power generation equipment has the advantage of mounting to foundations with large masses that dissipate vibration so it is not passed to nearby equipment. The components around the nacelle show a few mounting and vibration control devices from Lord Corp.
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