渣浆泵在使用过程中磨损规律

渣浆泵抽送固液混合物时磨损最严重的零件就是叶轮，其次是泵体或者护套、护板等过流部件。泵的磨损取决于下列各个参数和因素之间的内在关系:固液混合物流变特性。固体颗粒粒径级配、粒形、硬度和密度等。泵的结构形式与参数。泵的转速或者叶轮圆周速度。泵用材料的性能，如硬度、强度、延伸率、耐酸碱性、耐热性等，叶轮磨损规固液混合物从吸入短管流进叶轮时，固体颗粒由轴向转为径向并向后盖板运动，由于惯性作用与后盖板相撞，后盖板就承受较大的颗粒作用力，磨损加剧。固体颗粒大部分由叶片前缘进人靠近叶片工作面的叶片流道内，而有一部分颗粒进入靠近叶片背面的流道内。从渣浆泵叶轮磨损形貌和磨损结果来看，叶片磨损从其前缘向后缘扩展。抽送细颗粒的混合物时，在叶片流道内与叶片叶型曲率相近的轨线运动，叶片工作面所受到的磨损比叶片背面严重，
  固体颗粒从叶片出来时，其中细颗粒沿着较小出口角的轨线运动。在叶轮外周毗邻的混合物流动区内，细颗粒具有不大的径向运动速度.混合物从叶轮流出并慢慢地流向泵体的内周壁面，固体颗粒逐渐增多，叶轮叶片出口边承受混合物的强烈作用，叶片出口边是叶片磨损最严重的部位。

Wear Law of Slurry Pump in Use

When slurry pump pumps solid-liquid mixture, the most worn parts are impeller, followed by pump body or sheath, sheath and other over-flow parts. The wear of pumps depends on the intrinsic relationship between the following parameters and factors: rheological properties of solid-liquid mixtures. Particle size distribution, particle shape, hardness and density of solid particles. Pump structure and parameters. Pump speed or impeller circumferential speed. Pump material performance, such as hardness, strength, elongation, acid and alkali resistance, heat resistance, etc., impeller wear gauge solid-liquid mixture from the inhalation of short pipe into the impeller, solid particles from the axial to radial and backward cover plate movement, because of inertia and the rear cover plate collided, the rear cover plate will bear greater particle force, wear. Increased. Most solid particles enter the blade runner near the blade working face from the blade leading edge, while some particles enter the runner near the blade back. According to the wear morphology and results of impeller of slurry pump, the blade wear extends from its leading edge to its trailing edge. When the mixture of fine particles is pumped, the trajectory motion in the blade runner is similar to the curvature of the blade profile, and the wear on the blade working face is more serious than that on the back of the blade.

When the solid particles come out of the blade, the fine particles move along the trajectory with a smaller exit angle. In the mixed flow region adjacent to the impeller periphery, fine particles have little radial velocity. Mixture flows out from the impeller and slowly flows to the inner wall of the pump body. Solid particles gradually increase. The impeller blade outlet bears the strong effect of mixture. The blade outlet is the most worn part of the blade.