Study On The Mechanism Of Microclearance Fluid Leakage In Scroll Compressor

Scroll Compressor is a kind of displacement compressors,which is small in size,low in noise and high in efficiency.It is widely used in many areas of technology.During the working process of the Scroll Compressor,the compressed gas is released through the gap of the scroll tooth.In this paper,ANSYS finite element analysis and experiment is used to analyze the influence mechanism of micro-clearance fluid leakage.Theory analysis shows that the influencing factors of micro fluid clearance leakage is mainly composed of differential pressure,fluid velocity,and the size of the gap,the length of leak line,seal structure,etc,this article focuses on the sealing structure and gap size on the influence of the leakage scroll tooth.The radial leakage caused by the axial clearance during the operation of the Scroll Compressor is an important factor affecting the efficiency of it.The Sealing Strip can be placed in the seal groove on the top of the scroll tooth,which solve the sealing problem.Using ANSYS finite element analysis software,under the same load,with Sealing Strip and no sealing strip deformation of Orbiting Scroll,leakage is simulated,the results show that the existence of sealing mechanism makes the Orbiting Scroll axial clearance value greatly reduced.The simulation results verify that the existence of the sealing mechanism greatly reduces the axial clearance value of the scroll plate.Therefore,placing the sealing mechanism at the top of the scroll wrap is an effective way to reduce the axial clearance of the scroll plate.Through simulation analysis of the seal groove structure with different structural parameters,the results show that the width of the groove is constant,and the larger the groove depth,the greater the deformation of the scroll wrap.The depth of the groove is constant,and the greater the width of the groove,the smaller of the scroll tooth's deformation.Comparing the total deformation and axial deformation of the scroll plate under the same load,it was found that the optimal groove structure size is3 mm wide and 2mm deep.Based on ANSYS software,simulation of different parameters of the Sealing Strip under the same load.Observe the deformation and leakage of the scroll wrap.The results show that the Sealing Strip with different structure sizes placed on the tops of the scroll wrap have a great influence on the clearance and leakage of the scroll wrap.The width of the Sealing Strip is constant,and the larger height the Sealing Strip,the greater the deformation.The height of the Sealing Strip is constant,the greater the width,and a smaller deformation.Under the optimum size of sealing strip,the optimal assembly clearance value along the arc length when assembling the scroll plate,used to guide the actual machining assembly.Considering the special structure and high price of scroll plate,it is difficult to perform a gap measurement directly inside the scroll plate.Therefore,combining the similarity theory and the dimensional analysis method,the specific device is modeled and experiment with the model.The experimental results show that the sealing mechanism has a certain depth,and the larger the width,the smaller the leakage.The width of the sealing mechanism is constant,and the greater the depth,the greater the leakage.The experimental results correspond to the simulation results.The correctness of the simulation results was verified.