The Analysis And Research On Water Pressure Test Of Weld Casing In Compressor

Shenyang Blower Works(Group) has step to another important stage for nationalize large ethylene crack unit after evaluation for one million tons ethylene crack compressor. Goodness or bad of designing and manufacturing of this kind of compressor are directly affected this importance science research. Select suitable compressor casing is very important to this project even SBW has done similar casing before, but for this kind of compressor is first unit to SBW. So we must analysis complete welding casing strength, find out defection and weakness, improved in future design.This article mains to check stress and strain for casing each part, such as inlet and outlet, split flange, split surface connecting bolt hole changed under inner pressure increase through welding casing hydraulic test, then get actual stress and strain data, comparing with each part stress and strain with limit element analysis theory calculation, after this work, we can get theoretical and actual document to design and manufacturing ethylene unit compressor. Content is this article can conclude into following points:(1)Instruction of compressor(2)Force analysis of centrifugal compressor(3)Hydraulic test base of compressor(4)Compressor welding casing with type 2MCL907 complete strength analysis. Decide dangerous position through limit element analysis casing stress condition of different part, this can help for compressor design, and decide exact position for further add. Special stress sensitive part on casing.(5)Simulate actual pressure and do stress calculation for casing.(6)Perform casing static strength hydraulic test acc. To above data, and do actual measure with add special stress sensitive part, then measure stress and strain value of dangerous position, then verify theory calculation correct or not, then decide if this casing can meet unit design requirement.