Research on Axial Clearance Leakage of Scroll Compressor Based on Turbulence Model
To control axial clearance leakage of scroll compressor,the axial clearance leakage is quantitatively calculated.In order to get closer to the engineering practice,a complete theoretical calculation model for the clearance leakage of scroll compressor is established based on turbulence theory,considering factors such as speed,temperature and gas viscosity.The key parameters affecting the axial clearance leakage were analyzed,so as to achieve the purpose of controlling the clearance leakage by optimizing the parameters.Meanwhile,in order to verify the reliability of the theoretical calculation model,a simulation scroll compressor test platform was built,and the leakage value under different clearance and different speed of the fixed clearance was tested,and the theoretical calculation results were compared.The results show that the pressure difference of the high and low pressure cavity of scroll compressor is proportional to the leakage amount.When the spindle speed is unchanged and the clearance is 0.020 mm,the measured value fits well with the calculated results.Moreover,the leakage amount gradually decreases with the increase of the pressure difference,indicating that the gap leakage amount can be reduced by increasing the pressure difference.When the clearance is constant,the higher the spindle speed,the smaller the clearance leakage.When the speed is greater than 3500 r/min,the measured value and the calculated value begin to mesh,and the higher the speed,the higher the meshing degree.It shows that the leakage calculation model based on turbulence model is reliable.The quantitative and accurate calculation of axial clearance leakage provides a theoretical basis for reducing the leakage of scroll compressor,and also provides help for the popularization and application of scroll compressor.
万方数据
维普
