| Abstrakt: |
Conclusions: | 1. | In order to increase the operating period and service life of axial pumps transferring liquids with a high content of hard particles, they should be operated at maximum efficiency, at all installation angles of impeller blades. | | 2. | Superimposition of isolines of hydroabrasive wear onto the universal characteristic diagram enables optimal operational regimes for pumps to be selected on a well-founded basis, and also makes it possible to make engineering-economic comparisons of alternative pumping-station arrangements which differ in the number of units. | | 3. | The data obtained regarding changes in the zones of hydroabrasive wear on components of the flow-through parts of axial pumps, which occurs as their operating conditions are varied, enables design measures to be taken for their protection. | | 4. | The protective effect of cavitation, which is based on the damping properties of the cavitation zone, when traced experimentally over a wide range of change in the concentration of the turbidity current and the operational pump parameters, enables, within certain limits, the intensity of total cavitational-abrasive wear to be reduced. |
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