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Process Engineering Equipment Handbook 2009 Part 5

Tham khảo tài liệu 'process engineering equipment handbook 2009 part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Compressors C-167 FIG. C-162 Section through a horizontally split axial compressor. Source Sulzer-Burckhardt. An appropriate selection of impellers and diffusers enables the compressor stages to be matched to any specified operating data. See Figs. C-163 through C-167. The barrel-type design is suitable for discharge pressures of up to 700 bar. It has vertically split casing with end cover and autoclave cover and horizontally split internal casing for easy assembly and dismantling. Option of intermediate nozzles for connecting to intercoolers or for side-stream intake or extraction. The internal components including the horizontally split internal casing autoclave cover diaphragms and rotor with bearings and seals are assembled outside the barrel casing the internal clearances can then be checked exactly prior to final assembly. Compressor design adaptability of standardized product range. The different ways of adapting standard designs to varied operating conditions are described as follows Adapting to different specific flow conditions. The basic dimensions of the components and parts of compressors such as casings impellers diffusers and bearings are standardized by using a constant scale factor between the different frame sizes. As can be seen in Fig. C-165 this factor is 1.25 for the casing sizes 1.12 for impeller diameters and even smaller for certain dimensions of internal parts. This system permits the assembly of various compressors complying to specified data by using a minimum number of predesigned parts. Moreover it ensures accurate forecasting of performance interpolated from other frame sizes. The eight frame sizes cover a range between 0.5 and 60 m3 s. The range of higher C-168 Compressors Pressure ratio FIG. C-163 Selection chart for centrifugal compressors of the R and RZ series. Source Sulzer-Burckhardt. suction volumes above about 25 m3 s and up to 350 m3 s is covered by 12 frame sizes of axial compressors where a scale factor of 1.12 is used. .