Compressed air supply system - utilises silencer with tubular acoustic damper, forming mount for blower and driving motor

摘要

A compressed air supply system consists of a Rootes blower (2) driven by a belt from an electric motor (4). The air delivery silencer (10) which is of round, oval or elliptical cross-section forms a mounting platform for the blower and motor. The silencer consists of three parts, a resonant chamber (7), a sound absorbing chamber (8) and a second resonant chamber (9). The resonant chambers extend over the full cross-section of the silencer body. The sound absorbing chamber has an inner wall formed by a perforated tube (13) with a layer of sound absorbing material between the tube and the outer wall of the silencer. The sound absorbing material consists of a layer of non-combustible fibre which is between 3 and 15 cm thick.