Gao Xiufeng,Feng Shiyu,Gu Zhaolin,Yu Yongzhang
(School of Environmental and Chemical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
Abstract:The analysis of the meshing regulation of profiles for scroll fluid machinery modified by arcs and lines reveals that the gas force is different from that of the unmodificative wraps only if the modified profile participates in the meshing process.The simplified and accurate methods to calculate the tangential and radial gas forces at any rotating angle of the moving scroll are summarized.These methods are suitable for all scroll warps modified by arcs and lines.The practical examples verify that the deviation of the simplified method is less than 5£¥ for the tangential force and 15£¥ for the radial force.After the wrap modification,the fluctuation of tangential and radial forces is one time higher,and the maximal radial force is almost equal to the minimal tangential force under the insufficient compressing condition£®
Keywords:scroll machinery;modification of wrap;gas force