Cold Air Unit

The cold air unit consists of an inward flow turbine driving a centrifugal compressor on a common rotor shaft. The assembly is contained in two main casings, the turbine volute casing and the compressor volute casing. The casings are clamped together by a two-piece clamping ring and enclose a bearing housing. The turbine wheel and the compressor wheel are similar, each consisting of an aluminium alloy wheel cast with aluminium allow blades. The turbine wheel rotates within a nozzle ring and the compressor wheel within a diffuser ring.