Stress and Dynamic Analyses of Scrolls of An Aluminum Alloy Scroll Compressor
|關鍵字:||渦卷式壓縮機;渦卷;固定渦卷;繞動渦卷;歐丹環;Scroll Type Compressor;Scroll;Fixed Scroll;Orbiting Scroll;Oldam Ring|
研究生：林坦蔚 指導教授：蔡忠杓 博士
Stress and Dynamic Analyses of Scrolls of An Aluminum Alloy Scroll Compressor Student：Tan-Wei Lin Advisor：Dr. Chung-Biau Tsay Institute of Mechanical Engineering National Chiao Tung University Abstract In recent year,the performance of a compressor demands with higher efficiency, superior reliability, lower noise, and lower cost. Simultaneously, the environmental protection and energy conservation consciousness have promoted to cause that the current compressors do not satisfy their future requirements. For this reason, improving a compressor’s performance, investigation of new refrigerants and development of new types of compressors are more eager than ever. Consequently, an aluminum alloy scroll type compressor is gradually drawn attention to the designer and already have practical products in the market. It is known that the most shapes of scrolls are composed of standard involute curves. From the mathematical point of view, the involute curve is merely a special case of the extended involute curve unwrapped from the same base circle. Therefore, a more general shape of scroll, the extended involute scroll, is adapted in this thesis. In this study,investigations on stress and dynamic analyses of scrolls are studied. First, deformation and stress of the fixed and orbiting scroll members under operating conditions are simulated. This is accomplished using the finite element method based on the calculated datum concerning the pressure and temperature effects,As a result,the distributions of stress and deformation of the fixed and orbiting scrolls due to the pressure and temperature effects are obtained.Second, combining the fixed and orbiting scroll members under operating conditions, most of the efforts were devoted to deal with the contact stress and deformation of scrolls due to the pressure and temperature effects, and proposed related methods to modify the scrolls. Finally, when fixed and orbiting scroll members under operating conditions, some gas forces exert on scrolls in different directions, therefore, the dynamic behaviors of the orbiting scroll members are simulated by choosing the 6061-T6 aluminum alloy as the material for the scroll. The simulated results are most helpful to the design and manufacture of the scroll compressors.