| 摘要 |
1,195,001. Air intake silencers; gas turbine plant. AMERICAN MACHINE & FOUNDRY CO. Jan. 8, 1969 [Jan. 16, 1968], No.1212/69. Headings F1B and F1G. [Also in Division B1] An air intake silencer for a gas turbine plant comprises a box section member 10 containing vertically disposed, parallel, sound absorbing plates 30 which direct air entering the silencer through a duct 28 to the gas turbine plant. Air enters at the sides of the silencer and is cooled by water sprays from pipes 52 before passing through moisture removing sections 48 and filters 50. Each section 48 is made of stationary glass wool pads or nylon fibres or a rotatably driven cylinder of nylon fibres. The filtered air is guided into the passages between plates 30 by the curved leading edges 32 of the plates, the latter being staggered rearwardly, as shown. The trailing edges 34 of the plates 30 are tapered and airscoops 42 are provided at the top and bottom of the plates. The latter are each composed of structural members of corrosion resistant material such as galvanized steel or stainless steel clad with acoustic packing such as a blanket or semi-rigid board of glass wool having a density of from four to six pounds per cubic foot. The structural members and acoustic packing are covered with perforated, galvanized, sheet steel, with the possible interposition of a layer of glass cloth. The structural walls of the silencer are of rust resistant material such as aluminium, galvanized iron or stainless steel and may be covered with sound absorbing material on their inner surfaces. To prevent air starvation of the gas turbine plant in the event of blockage of the filters 50, a door 58 is hinged at 60 to the front wall of the silencer. The door 58 is normally held closed by a weight 62, but opens with a build up in suction to admit atmospheric air. |
