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渣漿泵在使用過程中磨損規律

渣漿泵抽送固液混合物時磨損最嚴重的零件就是葉輪，其次是泵體或者護套、護板等過流部件。泵的磨損取決于下列各個參數和因素之間的內在關系:固液混合物流變特性。固體顆粒粒徑級配、粒形、硬度和密度等。泵的結構形式與參數。泵的轉速或者葉輪圓周速度。泵用材料的性能，如硬度、強度、延伸率、耐酸堿性、耐熱性等，葉輪磨損規固液混合物從吸入短管流進葉輪時，固體顆粒由軸向轉為徑向并向后蓋板運動，由于慣性作用與后蓋板相撞，后蓋板就承受較大的顆粒作用力，磨損加劇。固體顆粒大部分由葉片前緣進人靠近葉片工作面的葉片流道內，而有一部分顆粒進入靠近葉片背面的流道內。從渣漿泵葉輪磨損形貌和磨損結果來看，葉片磨損從其前緣向后緣擴展。抽送細顆粒的混合物時，在葉片流道內與葉片葉型曲率相近的軌線運動，葉片工作面所受到的磨損比葉片背面嚴重，
  固體顆粒從葉片出來時，其中細顆粒沿著較小出口角的軌線運動。在葉輪外周毗鄰的混合物流動區內，細顆粒具有不大的徑向運動速度.混合物從葉輪流出并慢慢地流向泵體的內周壁面，固體顆粒逐漸增多，葉輪葉片出口邊承受混合物的強烈作用，葉片出口邊是葉片磨損最嚴重的部位。

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.