Abrasive Erosion and Corrosion of Hydraulic Machinery by C. G. Duan, V. Ia Karelin

By C. G. Duan, V. Ia Karelin

A scientific exposition of abrasive erosion and corrosion of hydraulic equipment in either idea and engineering perform. all of the vital matters are mentioned together with basics, calculation, research and numerical simulation of liquid-solid circulation layout, erosion-resistant fabrics, interplay among cavitation and abrasive erosion, and corrosion of hydraulic equipment.

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Extra resources for Abrasive Erosion and Corrosion of Hydraulic Machinery (Series on Hydraulic Machinery)

Example text

E with the specified sediment matter densities, and all other things being equal, the intensity of hydraulic abrasion is proportional to the 3rd power of the diameter of solid particles. 17) is in poor agreement with the data obtained in number of experiments. 5 a). 6 4(mm) (b) (a) alteration of relative erosion (b) erosion rate alteration (1. aluminum; 2. 5 a). 18) Fundamentals ofHydroabrasive Erosion Theory 15 where I'h is erosion rate per hour, as related to the sand grain size dh = 1 mm and depending on concentration and mineral composition of sediments.

5 A v >c f - \ \ 0 30 o 60 a0 1. hardened steel, with hardness 840 kgf/mm2 2. non-hardened steel, with hardness 128 kgf/mm2 3. 7 Dependence of the erosion rate in specimens of steel and rubber on the solid particle angles of incidence At a < 73° the erosion rate of soft steel rises due to increase of the tangential component in the impact impulse, which results in the material failure effected by shearing. At a < 30° the soft steel erosion rate falls down again, which results from a continuous decrease, taking place in the normal component of the impact strength.

The erosion resistance of these labyrinth can be increased by either fabricating them from a material harder than a conventional carbon steel or by constructing the labyrinths with a more sophisticated configuration that can ensure lower leakage. Labyrinths rings made of austenitic-ferrite steels may prove to possess a sufficient level of erosion resistance. e the capability of these components to withstand, for a sufficient time period, the action of a flow containing the sediment particles suspended therein, depends on a number of factors.

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