What are the suction modes of the fire pump impeller?
Single suction pump:Horizontal axial suction, to spit out the pump. Radial suspension type structure, maintenance without dismantling the inlet and outlet pipe, you can exit the rotor parts for maintenance. The pump through ordinary elastic coupling or lengthened coupling and motor elastic coupling, pump shaft with soft packing seal. Bearing a single row radial ball bearing and using the lubricating oil. From the end of the motor, the pump rotates clockwise.
Double suction pump is the two suction chamber, water inlet and a water inlet pump are vertically below the axis. The most important is the direction of the impeller inlet. Double suction pump is the advantage of the same speed and flow rate, because the decrease of inlet velocity, the pump is not prone to cavitation.
As an important form of centrifugal pump, it has the characteristic of high lift, large flow, has been applied widely in engineering. This type of impeller pump impeller is actually a combination of two back-to-back formed into a water outflow from the impeller volute. Double suction pump has the following characteristics: it is in two the same diameter single suction impeller at the same time, can be doubled in the outer diameter of the impeller under the same flow; the pump shell level in the open, convenient inspection and maintenance, at the same time, double suction pump inlet and outlet in the same direction and perpendicular to the axis of the pump, to pump and the water pipe layout and installation of the impeller; symmetrical structure of double suction pump, no axial force, relatively stable operation.
