为了研究气-热-固及散热片对涡旋盘的变形及应力的综合影响，应用Solidworks建立动、静涡旋的三维实体模型，基于有限元理论采用间接耦合法对动、静涡旋以及动、静涡旋装配后在气体力及热-固耦合状态下的变形和应力进行分析，由计算结果可知动、静涡旋单独分析时最大变形均发生在涡旋齿头顶部，最大应力发生在涡旋齿头根部，静涡旋的变形和应力比动涡旋略大；温度载荷对动、静涡旋的变形和应力分布影响较大,装配后涡旋盘的变形由于互相干涉和约束而减小；研究在不同轴向间隙和径向间隙情况下，动、静涡旋啮合时的最大变形和应力变化趋势，得出涡旋盘的最佳装配间隙；对比分析涡旋体外设散热片对涡旋齿变形的影响，结果表明设置散热片能减小涡旋压缩机涡旋齿的变形，增加运行可靠性。

In order to research the comprehensive influence of gas-thermal-solid and the cooling fin on the deformation and stress of scrolls, the 3D models of orbiting and fixed scrolls are created. On the basis of finite element method(FEM) and indirect coupling method, the deformation and stress of orbiting scroll, fixed scroll and assembly of scrolls are investigated under the conditions of forced by gas force and thermal-solid coupling. The calculation results show that the maximum deformation occurs in the top of scroll teeth head and the maximum stress occurs in the bottom of the scroll teeth head when the orbiting scroll and fixed scroll are analyzed separately. The deformation and stress of the fixed scroll are slightly larger than the orbiting scroll. Temperature load has a greater effect on the deformation and stress of orbiting and fixed scroll. The deformation of scrolls decreases due to the mutual interference and restriction after the assembly. The suitable assembly clearance is got by the analysis of the maximum deformation and stress variation trend of the scrolls under the conditions of different axial and radial clearance. The comparative analysis of the cooling fin affect on deformation of the scroll teeth is carried out. The investigation results show that cooling fin can reduce the deformation of the scroll tooth and increase the reliability of operation.