离心式固液两相流泵是固体物料管道水力输送的关键设备，输送效率和输送时的维护成本都与它有直接关系，其主要失效形式是叶轮叶片的磨料磨损。叶轮参数的选择和叶片型线的确定都直接影响泵的水力效率和抗磨损能力。 在查阅大量国内外相关文献的基础上，本文选择边界层理论作为研究叶片型线设计的基本理论。在固液两相流的液相和固相动量微分方程、连续方程及固液相耦合方程的基础上，推导了基于边界层理论的叶片型线方程。由于边界层分离和尾流区的影响都会加剧磨损和降低水力效率，本文讨论了边界层分离条件，总结出无进口预旋时叶片型线的设计方法。通过叶轮叶片磨损机理的研究，推导出了进口预旋角的选择方法，该方法能有效降低尾流区影响，从而减小固体颗粒对叶片的磨损。这样既避免了三维流体的复杂数学模型的建立和推导，又弥补了边界层理论在进口预旋角选取上的不足。 以100型渣浆泵为实例，利用边界层理论设计出了叶片型线的参数方程。利用Pro/E建立了叶轮的三维参数化模型，该模型中的叶片是以边界层理论推导出的叶片型线的参数方程为基准线，利用Pro/E的薄板扫描特性而生成的。因此，该模型符合边界层理论，满足边界层不分离条件。本文还利用Pro/E的族表特性，实现了叶轮的动态建模。 利用Ansys软件对叶轮的单个叶片所受的应力进行了有限元分析，再对采用对数螺线设计的叶片进行建模和同条件下有限元分析，二者对比结果表明，基于边界层理论所设计的叶片应力较均匀，应力最大值约减小18%，所以应用边界层理论进行叶轮设计能有效降低磨损，提高叶轮及泵的寿命。 本文的研究方法和结论，发展和完善了离心式固液两相流泵的边界层理论，对工程上离心式固液两相流泵的设计有一定的指导意义。

The centrifugal Pump for solid-liquid Two-phase fluids is the key equipment that the solid supplies transports by water pipeline, both sending efficiency and maintaining cost while sending have direct relations with the centrifugal pump. The main invalid form of centrifugal pump is the wearing and tearing of the blade of the impeller. The choice of impeller parameter and the sureness of blade type line have direct influence to the flowing losses and the resisting ability of wearing and tearing. Having consulted a large amount of relevant materials, boundary layer theory is chosen as the basic theory for studying the design method of the blade type line. Based on momentum differential equations of liquid and solid phase of the solid-liquid two-phase fluids and on the solid liquid phase coupling equation, have derived the blade type line equation based on boundary layer theory. Because both boundary layer separate and the influence of tail shedding area will enhance the wearing and tearing on the boundary that fluid flows and reduce water conservancy efficiency sharply, so the Criterion that boundary layer separates is discussed, and then the Design method of blade type line is summarized. Studying on the function of wearing and tearing, the Entry angle choose method that can largely reduce tail shedding area influence is derived, thus can reduce the wearing and tearing to the blade of the solid particle effectively. So not only avoided the setting-up and work on the complicated mathematics model of the three-dimensional fluid, but also the boundary layer theory is developed on the Entry angle choose method. In this article I choose type 100 dreg thick liquid pump as the instance , using the boundary layer theory designs the parametric equation of the blade type line. Using Pro/E three-dimensional parameter model of the impeller is set up, this blade model is set up by feature sweep a thin board of Pro/E based on datum line that blade parametric equation of line that derived from boundary layer theory. So this model accord with boundary layer theory, meet no boundery layer separate terms. Utilizes the family table of Pro/E, has realized the dynamic modeling of the impeller . In this article the stress to the individual blade of the impeller has been carried on finite element analysis by ANSYS, and then the logarithm spire blade that the dreg thick liquid pump adopts extensively carried on modeling and analyses with the finite element under the seem condition, compareing with the two result, it indicate blade that designed by the theory of boundary layer the stress is more even on the basis of border, the stress maximum nearly reduces 18%, so we can learn that using boundary layer theory can reduce the wearing and tearing of the impeller effectively, thus can improve the life-span of the impeller and pump. Research approach and conclusion of this article, boundary layer theory of the solid-liquid two-phase fluids centrifugal pump has developed and perfected, and provide an important reference of the two-phase fluids pump design.