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为了更准确地计算涡旋压缩机涡旋齿的应力和变形,提出一种基于流场模拟的应力变形计算方法。通过对涡旋压缩机工作过程进行气体流动的数值模拟,得到其压力场和温度场分布。将流场分布作为载荷边界条件进行涡旋齿的受力变形计算,得到涡旋齿在气体压力、热载荷及其同时作用下的应力分布和变形规律。分析了涡旋齿的径向变形和轴向变形,讨论了不同主轴转角下的涡旋齿应力和变形,比较了动涡旋齿和静涡旋齿的变形。结果表明:在压缩结束时刻动涡旋齿的应力和变形最大,最大应力位于齿头根部,最大变形位于齿头顶部。
In order to calculate the stress and deformation of scroll compressor scroll more accurately, a calculation method of stress deformation based on flow field simulation is proposed. Through the numerical simulation of the gas flow in the scroll compressor working process, the pressure field and the temperature field distribution are obtained. The flow field distribution is taken as the load boundary condition to calculate the force and deformation of the spiral tooth. The stress distribution and deformation law of the scroll tooth under gas pressure, heat load and its simultaneous action are obtained. The radial deformation and axial deformation of the wrap were analyzed. The stress and deformation of the wrap under different spindle angles were discussed. The deformation of the movable wrap and the fixed wrap was compared. The results show that the stress and deformation of orbiting scroll teeth are the highest at the end of compression. The maximum stress is located at the root of the tooth head and the maximum deformation is at the top of the tooth head.