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.