Simulation of piston ring deformation and refrigerant leakage in CO2 compressor
In order to study the influence of piston ring movement and deformation on refrigerant leakage during compressor operation,Solidworks software was used to establish a three-dimensional model of the piston ring.Fluid-structure interaction numerical simulation of the piston ring conducted through ANSYS software.Then the deformation of the piston ring was studied under the maximum temperature and pressure load.A refrigerant leakage channel model was established and a profile program was written to obtain the variation pattern of refrigerant leakage velocity in the channel under changes in piston ring position and inlet pressure.The results show that at the end of the compression stroke,the refrigerant leakage reaches its maximum value,and there is longitudinal displacement of the piston ring during the expansion stroke and compression stroke.Under the two strokes,the speed of the lowest piston ring 3 is the highest,and the speed of the middle piston ring 2 is the lowest.Compared with the expansion stroke,the overall velocity of the three piston rings under compression stroke is greater,and the displacement time required is shorter.The research results provide a theoretical basis for the force analysis of piston rings and refrigerant leakage.
CO2 piston compressorpiston ringleakagefluid-structure interactionnumerical simulation
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