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Noise protection enclosures are needed for gas and steam turbines due to their extreme noise levels (comparable to airplane turbines). The noise protection enclosures are modularly constructed as an assembly kit, delivered with a hot-dip galvanised steel base and assembled on site. Several parts of the enclosure are accessible for inspection and maintenance purposes.

Silencers are used in oxygen stations containing rotary blowers. Because of the alternating pressure loads, especially high demands are placed on the vessel and their noise protection devices. The vessels are ideally of round design; the interior fittings are a combination of absorbent filling with a special cover plate for the protection of the mineral wool. To reduce the low frequencies, the absorbers are combined with panel resonators.

The noise enclosure is equipped with an extensive, horizontal intake silencer for cooling-air. The exhaust air silencer is mounted flat on the roof of the enclosure. The sides of the enclosure are constructed of detachable wall elements to facilitate the mounting of the engines being tested. The design and the drawing are made by LBF – of course, always incorporating the customer’s wishes, e.g. with regard to openings, lighting and observation windows.

Centrifugal fans generate high pressures. Therefore, the casings for the splitter silencers must be adequately dimensioned for this overpressure or low-pressure. The welded casings are generally produced of 2-6 mm thick sheet metal and usually fitted with reinforcement profiles. The “industrial grade” silencers consist of riveted perforated sheet metal and aerodynamic baffles for flow distribution and reduction of loss of pressure.

Noise protection barriers reduce the radiation of noise from the power units – in the project presented on this page, refrigeration machinery is being enclosed. The air supply for the facility is ensured through the intake openings, where silencers are used to provide noise protection. The noise protection barriers can be produced in the same material and colour to match the facility or the adjacent buildings.

Large spring elements are used for vibration-isolated mounting of heavy machinery, such as turbines, large blowers, or mechanical or hydraulic presses. Viscoelastic dampers are integrated into the production series in areas prone to earthquakes. The spring characteristics are tested and determined by our pre-load tester. Assembly is usually performed in two steps: the elements are placed after the bare brickwork is finished; releasing and alignment of the elements are done after the turbines are mounted.

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