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提出一种用于涡旋流体机械的渐变壁厚且渐变啮合间隙的涡旋齿型线,由变径基圆渐开线及其法向等距曲线组成;其特点是:从中心齿头到外圈齿尾涡旋齿壁厚逐渐减小,所形成的压缩腔在通向排出口方向存在啮合间隙;可用于气液混合增压或喷液气体压缩,防止压缩过程中出现压缩腔内气液介质压力骤增的问题;与等壁厚涡旋齿相比,该涡旋齿应力分布合理、涡旋齿变形小。将该涡旋齿应用于气液多相混输,通过数值模拟得到其工作腔的压力场、速度场的分布规律;分析了气液比、出口压力和转速对工作过程的影响。将介质压力场分布作为边界条件,得到了该涡旋齿在介质压力作用下的应力分布和变形规律。
A scroll profile line with gradual wall thickness and gradual meshing gap for scroll fluid machine is proposed, which consists of the involute involute of circle base and its normal isometric curve. Its characteristics are as follows: The thickness of the outer wraparound tail scroll wrap is gradually reduced, and the formed compression chamber has a meshing clearance in the direction of the discharge opening; it can be used for gas-liquid mixing pressurization or squirting gas compression to prevent the compression chamber internal gas Liquid medium pressure surge problem; compared with the equal thickness vortex teeth, the vortex tooth stress distribution is reasonable, the vortex tooth deformation is small. The vortex tooth is applied to gas-liquid multiphase mixing, and the distribution of pressure field and velocity field in its working cavity is obtained through numerical simulation. The influence of gas-liquid ratio, outlet pressure and rotation speed on working process is analyzed. The distribution of stress field and the deformation of the scroll wrap under medium pressure were obtained by using the distribution of pressure field as the boundary condition.