The working principle of mining wear-resisting medium pressure multi-stage pump

Mining wear-resisting medium pressure multistage water pump working principle: midway through each sectional multi-stage centrifugal pump impeller are installed outside of a roller, idler pulley is a fixed disk, its role is to put the part of the liquid from the impeller can kinetic energy is converted to static pressure by slowing, and the liquid collected along the radial flow and guide people to the next level of population of impeller. Wheel on the obverse of zin around the impeller is the guide of the outside of the leaf, the back has a population of lead liquid to the next level the impeller of the wizard. Minimum flow velocity, and static pressure to the highest. Along the axial impeller into the next level.

compared with the spiral case, small size of guide roller shape, can convert kinetic energy into static pressure efficiency is low. Due to the multiple blade wheel, when the working condition of the actual working condition of the pump and the design deviation, the trajectories of liquid flow impeller and guide roller blade shape, make its have larger impact damage and cause lower efficiency, so use roller device of centrifugal pump, efficient work area is relatively narrow, than the volute pump lift and efficiency curve are steep. But because the idler pulley has a center of symmetry, not like a spiral effect on the rotor radial pressure, so the multistage pump is in commonly use the volute on both ends of the fore and aft, and in the central segments using idler pulley. Because of the roller geometry is more complex, so the general cast iron casting.

as with single stage centrifugal pump, mine medium pressure multistage pump does not have self-priming ability, must be filled before start the water pump. Of mine multistage water pump working principle is by high-speed rotating impeller drive the liquid, causes the liquid to generate centrifugal force and energy. Side before this, in a impeller sucked indoor liquid into the first stage impeller, the impeller after on its power, and thrown into the first-class idler pulley, the roller can turn after the first grade, and then enter the second stage impeller, the secondary impeller to continue the work, and then enter the second wheel, and so on, from the end of the impeller, after collection of the spiral case, sent to the outlet.

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