Effects of particle diameter on erosion wear performance of slurry pump
Wang Jiaqiong1, Ye Qun1, Yan Kewei2, Feng Yaoning1, Yu Xunan1
1.National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Packaging Engineering Room of Machinery Ministry, Patent Examination Cooperation Jiangsu Center of the Patent Office, SIPO, Suzhou, Jiangsu 215011, China
Abstract:In order to investigate the influence of particle diameter on erosion wear performance of slurry pump delivering solid-liquid two-phase flow medium, the motion trajectory of particles with diffe-rent particle diameter is calculated based on Lagrange method, k-ε turbulence model, discrete phase zero equation model and Finnie ductile materials erosion model. The impact velocity, impact angle and other parameters between solid particle and machine surface were evaluated by numerical simulation, and the wear rule of solid-liquid two-phase flow in slurry pump are discussed. According to the simulation results,the particles with small diameter distributed relatively uniform in the flow path, had a very small probability of in collision with the hydraulic components, and the erosion wear of the blade was relatively weak. By contrary,the solid particle with large diameter was apt to move toward to the pressure surface and impacted the leading edge of the blade.The impact angle and velocity of the particles with large diameter was greater to the blades and the volute circumferential wall than the small ones, and the erosion wear of the blade was relatively strong. And the large particles might in collision with the hydraulic components many times in the flow channel, causing serious erosion.
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