ZLB Type Axial Flow Pump

Description

ZLB type axial flow pump is characterized by its large capacity,low head,etc.It can transport clean water whose temperature is less than 50℃,and also other liquids with physical and chemical properties similar to clean water.

Application Area

Large-small type axial flow is widely used in agricultural irrigation,water supply and drainage for city,circulation water for thermal power plant,water level for dock,aquaculture,salt field pool and other hydraulic projects.Large type axial flow is mainly used in a large area of agricultural irrigation,interbasin water transfer and drainage for low-lying area、lake area.

Performance Range

Diameter：250 ~ 2000mm

Capacity：400 ~ 80000 m3/h

Head：≤30 m

Structural Characteristics

ZL type axial flow pump is vertical structure,and is made up of pump casing and rotating parts.

Pump casing contains inlet bellmouth,impeller parts,diffusor,rubber bearing,shaft,outlet elbow,packing seal etc.

Impeller parts contain impeller seat,blade,compression nut.And static balance test shall be proceeded on the impeller before delivering.When user needs to adjust the installation angle of impeller,users can disassemble impeller parts,unscrew the compression nut,then rotate the impeller to make the blade base line align with the relative angle marks on the impeller seat,then tighten up the nut.If user has no special requirements when ordering,the blade installation angle is 0°when delivering.User can adjust on his own according to working performance curve and parameters.

Pump shaft is made of high quality carbon structural steel(45steel),and surface of journal is plated with hard chrome to improve wear-resistant anti-cavitation performance.Radial support of shaft is born by two rubber bearings(upper and lower).Before starting,clean water shall be filled into the inlet pipe of stuffing box to lubricate the upper rubber bearing,stop it after the water is coming out of pump.

Packing seal is used on the shaft hole of outlet elbow,made up of stuffing box,packing(Oil-immersed asbestos packing),packing gland.

Overlook from the coupling end,the rotation direction of impeller is clockwise.

Drive part:User shall confirm the drive type when ordering,according to using requirements and matched power.Drive type includes the following two types:

Direct drive device for vertical motor

Vertical motor is installed on the motor base, flexible coupling and motor shaft are connected on the upper end of transmission shaft,and the lower end is connected by solid coupling and pump shaft.When the pump operates,the thrust bearing from the drive device bears all the axial force.Axial displacement of pump rotor can be adjusted by the nut located in the drive device.

V belt drive device for vertical motor

Vertical motor is installed on the motor frame,connected with capstan through flat key.Motor frame can be slided on the guide rail by adjusting screw to adjust the degree of tightness of belt.And belt pulley is fastened on the drive shaft by connector.When pump operates,axial force is born by the thrust bearing on the belt pulley seat,and tensile force of belt pulley is passed to the belt pulley seat by radial bearing,which makes the drive shaft not effected by radial force.Axial displacement of pump rotor can be adjusted by the nut on top of the drive device.Drive shaft of axial flow pump shall not be too long,user must design the pump station according to dimension range of “L” in the installation outline drawing.

Pump outlet accessories are 30°elbow,straight pipe,expansion joint,diffuser etc,and outlet valve is installed on the end.User can choose accessories according to the actual condition,and makes remark when ordering.

The support of pump:Part weight of pump(Except the rotor part) is born by the foundation that supports pump casing, or born by the beam.Weight of drive device,motor weight and axial force(including weight of rotor part) are born by the floor that bears drive device.

Sectional Drawing