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采用坐标变换的方法对圆柱型气体螺旋槽密封的控制方程进行理论计算 .对复杂形状求解域构筑了非矩形网格 ,再通过坐标变换形成规则的矩形网格 .这种数值计算方法可在改变结构参数时 ,避免重新划分网格 .分析了影响密封性能的主要设计参数如螺旋角α,槽数n等对密封压力的影响规律 ,得出了优化结果 .设计了实验台 ,进行了大量实验验证 .实验值与理论计算值吻合较好 .最后 ,给出了该种密封型式的主要设计参数选取范围
The governing equations of cylindrical gas spiral groove seal are theoretically calculated by using the coordinate transformation method, the non-rectangular grids are constructed for the complex shape solution domain, and the regular rectangular grids are formed by coordinate transformation. This numerical calculation method can be changed after changing Structural parameters, to avoid re-meshing.Analysis of the main design parameters that affect the sealing performance, such as the helix angle α, the number of slots n on the sealing pressure, and get the optimization results.Design of the experimental bench, a large number of experiments The experimental value is in good agreement with the theoretical calculation.Finally, the range of the main design parameters of this type of seal is given