Performance range
Flow rate Q=0.18-50 m ³/ S
Head H=1-22 m
Model Description
1. Models with diameters below 40 inches
Example: 14ZLB-3.6
14- Outlet diameter (in)
Z-axial flow pump
L-Vertical
B - Half regulating blade
3.6- Design Head
2. Models with a diameter of 40 inches and above
Example: 65ZLB-50
65- Outlet diameter (in)
Z-axial flow pump
L-Vertical
B - Half adjustment blade (full adjustment is represented by Q)
50- The value obtained by dividing the specific speed by 10
There are 39 types of ZLB and ZLQ pump products, among which the caliber of 40 inches and above can be made into fully adjustable (ZLQ) pumps.
Structural characteristics
This type of pump can be designed as a double foundation vertical split structure and a motor pump directly connected single foundation structure.
1. Dual foundation vertical split structure
The pump mainly consists of the pump body, transmission device, transmission shaft, etc.
The main body of the axial flow pump consists of an inlet horn, impeller, guide vane body, outlet elbow, shaft, and bearing. The composition of the packing seal is shown in the figure. Borrow both ends of the pump shaft
The next two pairs of water lubricated rubber bearing supports, and the surface of the journal is plated with hard chromium.
Set a set of nuts at both ends of the pump shaft, which are respectively fixed to the hub body and coupling. When the pump is running, the axial force is borne by the thrust bearing inside the transmission device.
The axial displacement of the pump rotor is adjusted by the circular nut inside the transmission device.
The axial force of the pump, the weight of the transmission device and motor, and the weight of the rotor are all borne by the floor foundation supporting the transmission device. The weight of the pump casing is determined by the pump foundation
Bear.
There is an intermediate transmission shaft between the vertical motor and the water pump. The motor end of the transmission shaft is an elastic coupling, and the water pump end is a rigid coupling. Motor installation height L
To be agreed between the user and the manufacturer.
The length of the transmission shaft is generally used within the "L" size range specified in the installation outline drawing. If it exceeds the specified size, an intermediate bearing is required.
The outlet channel of an axial flow pump generally adopts a straight cone diffusion outlet pipe, with an outlet valve installed at the end.
The impeller has undergone static balance inspection.
The gap between the hub body and the guide vane body is 0.5-0.6% of the pump outlet diameter.
For the cylindrical impeller chamber, it is cast into an integral part with the inlet horn, and the blade placement angle is installed in place at once according to user requirements. Users are not allowed to change it at will.
The clearance between the outer edge of the impeller and the impeller chamber is about 0.1% of the impeller diameter, and the time gap should be appropriately increased when transporting sewage and impurities.
Turning direction: Looking down from the direction of the motor, the water pump rotates clockwise.
2. Directly connected single foundation structure of motor and pump
This type of pump is directly connected to the motor through a motor support, and the pump outlet can be designed above or below the foundation layer according to engineering requirements.
The axial water thrust becomes the internal force of the unit and is not transmitted to the foundation, greatly reducing the design strength requirements of the foundation load.
This model is easy to install, center, and maintain, and does not have an intermediate transmission shaft.
The pump can be designed as either a rotor component extraction type or an integral extraction type.
The pump shaft can be designed with a protective tube, and the sliding bearing can be lubricated and cooled with clean water to adapt to the working conditions where the medium contains particles.
The pump inlet channel can adopt an elliptical inlet channel to improve cavitation resistance and device efficiency.
