川大884化工原理电子版本课件双语chapter3.6f.pptxVIP

1 Chapter 3 Fluid Transfer and Fluid Moving machines 2 Types and selections of centrifugal pumps Common used types clean water （IS, D, Sh ） Used for water like liquids without containing solid particles. clean water anti-corrosion Oil slurry and slag Submerged shield 3 1 - body；2 - cover；3 - impeller；4 - shaft；5 – sealing ring； 6 - nut；7 - washer；8 – shaft cover；9 – packing cover； 10 – packing ring；11 - packing；12 - bearing Typical structure of an IS pump 4 Types and selections of centrifugal pumps Clean water pumps 5 Types and selections of centrifugal pumps D multi-stage centrifugal pump for high head 1－suction stage；2－middle stage；3－pump out stage； 4－shaft；5－impellers；6－induce vanes；7－bearing 6 Types and selections of centrifugal pumps TSWA horizontal multi-stage pump T —— turbine S —— single suction W —— lower than 80℃ A —— first modified DL vertical 7 Types and selections of centrifugal pumps 8 Types and selections of centrifugal pumps 1－body；2－cover；3－impeller；4－shaft；5－sealing ring； 6－axle sleeve；7－bearing；8－coupling Sh double-suction pumps may be used for large flow rates 9 Types and selections of centrifugal pumps 10 Types and selections of centrifugal pumps Anti-corrosion pumps made of anti-corrosion materials, used for transfer corrosive fluids. F series are typical. Notes: * Using different suitable material for different fluid. * Sealing is important to prevent fluid leakage. * Avoid temperature rising that will accelerate corrosion. 11 Types and selections of centrifugal pumps Anti-corrosion（F ） 12 Types and selections of centrifugal pumps Type Y and YS (double suction) Since oils are flammable and explosive, the sealing standard is high. Cooling system is needed for transfer hot oil over 200℃. Type P main features *few vanes on the impeller *wide flow path *hard structure material DFAY horizontal oil ZW self-suction sewage oil pumps slurry and slag pumps 13 Types and selections of cent