Centrifugal Compressors – Machine Components

Centrifugal compressors are made up of a casing with stationary internals, containing a rotating element, or rotor, supported by bearings. Shaft end-seals are provided to contain the process gas. Figure 200-30 shows a typical multistage compressor and identifies the basic components. (Refer to Figure 200-1 for details of the gas flow path.

The main machine components are:
• Casings
• Nozzles
• Stage
• Diaphragms
• Impellers
• Rotor
• Shaft
• Radial Bearings
• Thrust Bearing
• Balance Piston
• Interstage Seals
• Shaft-end Seals

Centrifugal Compressor Nomenclature

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