Analysis Of The Model Of The Engaged Scroll Plates And The Harmony Respond Of The Variable Cross-section Plate

In recent years,with the continuous development of manufacturing technology,the manufacturing of the scroll compressor become more and more economical and feasible.That is one of the reasons why the scroll compressor gets more and more widespread.Also the study of dynamic performance of the scroll compressor is one of the most important directions of the scroll compressor.So we should think more about the dynamic performance of the scroll compressor.Base on this we set up a scroll of three-dimension solid model and use the finite element analysis software to make the conditions closer to the actual.And we get the corresponding dynamics of the plates.The specific content mainly includes the following aspects:(1)A three-dimensional model of the scroll plat UHe with circular involutepolynomial curve is established,then the force analysis is carried out,and the value of the tangential gas force and the normal gas force is obtained.After the modal analysis of the entire system of the engaging scroll plates,the six-order natural vibration mode is obtained which is under the action of gas force.Through the modal superposition method,the harmonic response of the scroll plate is analyzed,and the displacement of the inner wall and outer wall of the scroll plate is obtained which is under different frequencies.(2)The three-dimensional model of the scroll plates with circular involute are established respectively.Then get the virtual assembly which include the fixed and the orbiting scroll plate,then import the assembly body into finite element software and then,after analyzing,the six-order natural modal of the assembly is get.By endowing the two scroll plates with two different materials properties,respectively,which are gray cast iron and the aluminum alloy.After the material property is given,the meshing system is tested,and the inherent modals of six different groups are obtained.It provides a theoretical basis for the design of vibration avoidance of vortex compressor.to do the experiment,six groups of different natural vibration type has been obtained.These provide the corresponding theoretical basis for the design of vibration avoidance of the scroll compressor.(3)The three-dimensional model of the scroll plates with circular involutepolynomial curve are established respectively.Then get the virtual assembly witch include the fixed and the orbiting scroll plate,then import the assembly body into finite element software and then,after analyzing,the six-order natural modal of the assembly is get.In the same way,by endowing the two scroll plates with three different materials properties,respectively,which are gray cast iron and the aluminum alloy.After the material property is given,the meshing system is tested,and the inherent modals of three different groups are obtained.By comparing the natural modal of scroll plate which with “circular involute” to which with “circular involutepolynomial curve “for vortex type line,another method of avoiding vibration of scroll compressor is obtained.By comparing the natural frequency of a single scroll of to the natural frequency of engaged scroll,we can get the conclusion: the natural frequencies of engaged scroll are below the natural frequency of a single scroll.This means the simulation of the single scroll plate has some deviations to the actual working conditions.By comparing different materials inherent in the scroll,we can found a way to improve natural frequency.And we can see to change the sections of the scroll plate is another way to improve the natural frequency of the scroll compressor.