By C. G. Duan, V. Ia Karelin
This publication offers a scientific exposition of abrasive erosion and corrosion of hydraulic equipment in either conception and engineering perform, and is the 1st entire quantity to hide this region intensive.
All the $64000 matters are mentioned together with basics, calculation, research and numerical simulation of liquid–solid circulate layout, erosion-resistant fabrics, interplay among cavitation and abrasive erosion, and corrosion of hydraulic equipment.
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Additional info for Abrasive erosion & corrosion of hydraulic machinery
5 kg/m3). ) takes place not only due to cavitation but also owing to hydroabrasive effect produced by suspended matter and abrasive-cavitation phenomena, remarkably enhanced when the pumps operate in those points of the curve "Q-H" which differ from the optimum. 5-m diameter has shown that peripheral regions in these impellers were mainly the regions subjected to the greatest erosion. Here one can reveal areas of uniform hydraulic abrasion as well as regions with deep channels and grooves. Certain blades and impeller rims include through holes.
The surface layer in rubber specimens (curve 3) absorbs, at the present flow velocity of particles moving with a = 90°, the greater part of the kinetic energy possessed by abrasive particles, and the rubber in this case erosions out slower, as compared with the other material, While the erosion rate in hardened steel specimens reduces with decrease of the attack angles, which is caused by gradual reduction of the normal impact strength component, the deterioration process, which develops with Fundamentals of Hydroabrasive Erosion Theory 19 reference to the steel and rubber, is accompanied at certain values of an angle of incidence, with qualitative changes.
The destruction of seals, in addition to volumetric losses, can be caused, in a number of cases, by solid particles getting into the bearings, which is quite intolerable. The fifth group includes inlet and outlet devices of pumps. According to the data obtained in a number of analyses, it is possible to conclude that the hydraulic abrasion rate developed in the pump outlets, particularly in the centrifugal pumps, which is presented by losses in mass per unit of time, exceeds considerably the erosion intensity in the impellers.
Abrasive erosion & corrosion of hydraulic machinery by C. G. Duan, V. Ia Karelin