Centered opening pump assembly sequence

1. Rotor Assembly

The impeller should be mounted in the correct position on the shaft, without biasing to one side, otherwise it will cause uneven axial clearance with the pump housing, leading to friction.

(2) Install the shaft sleeve and tighten the sleeve nut. To prevent water leakage along the shaft, sealant rings should be inserted between the sleeve and the nut. After assembly, ensure the sealant rings are securely pressed by the sleeve nut and that the nut is tightly against the sleeve.

(3) Install the sealing ring, packing sleeve, water seal ring, packing cover, and water-stop collar onto the shaft.

(4) Install the bearing cover and bearing, tighten the bearing nut, then fit the double-suction pump. Finally, mount the bearing housing and securely fasten the bearing housing to the bearing cover.

(5) Install the coupling.

2. Drop-in Rotor

(1) Gently lower the assembled rotor component into the pump casing.

(2) After positioning the sealing ring, rotate the rotor and observe for any friction. Adjust the sealing ring until the rotor rotates smoothly.

3. Bolted pump cover

After securing the pump cover, tighten the bolts at the pump joint surfaces and the bearing housing covers on both sides. Next, open the double-suction pump and rotate the rotor to see if there are any differences from before. If there are no obvious abnormalities, connect the air pipe, sealant water pipe, etc., add the packing, and then proceed to align the couplings.

Technical Advantages of Type Single-Stage Double-Suction Centrifugal Pump

Advantage One: The single-impeller double-suction centrifugal pump employs a two-section impeller blade overlapping layout, thereby adjusting the blade frequency (based on the pump housing tongue frequency), which reduces the single pulse of fluid flow (approximately reducing the pump head by 1‰ to 4‰), resulting in more stable fluid flow, higher efficiency, less vibration, and more reliable operation.

Advantage Two: The introduction of a unipolar double-suction mid-open pump for low pulsation beverage systems, incorporating a hydraulic power generation physical model, utilizes CFD for fluid mechanics statistical analysis. Centrifugal double-suction pumps are purposefully optimized for performance enhancement; performance parameters exceed industry standards, achieving a level that is 92% higher.

Advantage Three: The low NPSH double-suction centrifugal pump impeller inlet edge features a convex arc design for reliability, increasing the total area of the liquid flow inlet, reducing the inlet flow velocity, and thereby increasing the working pressure at the inlet edge, which in turn enhances the NPSH. The impeller tip is designed with an airfoil streamlined shape, which reduces impact damage and vortices, not only improving the higher value but also widening the area, ensuring even pressure distribution, and enhancing the cavitation characteristics.