Axial flow pumps can be divided into two types according to the installation method, which can be divided into common seat type and block type. The motor and the transmission device are directly arranged on the pump structure, and the whole pump is shared with a foundation support; the split seat type pump is respectively arranged on the upper and the lower two different bases of the motor and the transmission device. The vertical axial flow pump is widely used in base structure, and a structure used only in some small axial flow pump.
In small axial flow pump is usually made of semi adjustable blade, divided seat vertical type axial flow pump blade is semi adjustable pump. The blade of the impeller is fixed on the lower end of the shaft by a key and a nut. When the pump rotor rotates, the water is from the horn shaped suction pipe suction impeller, with axial guide vane diffuser and the pressure pipe discharged out of the pump by the blades driven. The rotation system is supported by the upper guide bearing and the lower guide bearing, and the pump is operated by a water diversion pipe and is introduced into the clean lubricating water supply.
The pump shell weight a vertical axial flow pump by the installed base below under axial force, and weight, pump motor and the transmission device is supported by the foundation of the above. Motor needs to be installed at the local maximum water level above, the pump installation height should ensure that the impeller is under the minimum water level, and there is sufficient depth of submerged. When the transmission shaft between the pump and the motor is very long, the middle guide bearing should be arranged in the proper position to prevent the bending and vibration of the shaft.
Axial flow pump can adopt full adjustable, the size of the pump is usually larger, China used pump outlet pipe diameter greater than 700 mm of large and medium sized axial flow pump, and the use of vertical structure.
