Double Impeller Centrifugal Pump
1. Large flow rate: The unique structural design of the double-suction pump gives it a large flow area. It absorbs water from both sides at the same time, and the water flow converges in the pump cavity before being discharged. This design greatly increases the water flow delivery capacity. Compared with the single-suction pump, under the same working conditions, the double-suction pump can deliver more liquid to meet the needs of large flow rates. For example, in scenarios such as urban water supply systems and large-scale irrigation projects, it can efficiently provide sufficient water sources for large areas.
2. High head: Through reasonable impeller design and pump body structure, the double-suction pump can produce a higher head. The shape and size of the impeller have been carefully optimized to effectively convert mechanical energy into pressure energy of the liquid, so that the liquid can obtain enough energy to overcome pipeline resistance and lifting height during the transportation process. This feature makes the double-suction pump suitable for occasions where the liquid needs to be lifted to a higher position, such as high-rise water supply, mine drainage, etc.
3. Stable operation: The symmetrical structural design of the double-suction pump makes it relatively balanced during operation. Since water is sucked from both sides at the same time, the radial forces on the impeller offset each other, reducing the vibration and noise caused by unbalanced radial forces. This not only extends the service life of the pump, but also improves the stability and reliability of operation. In the long-term continuous operation of industrial production processes, the stable operation state can ensure the continuity of production and reduce the downtime caused by equipment failure.
4. Good anti-cavitation performance: Cavitation is a problem that the pump may encounter during operation, which will have a serious impact on the performance and life of the pump. The double-suction pump effectively improves the anti-cavitation performance through the optimized suction chamber design and reasonable impeller parameters. The shape and size of the suction chamber enable the liquid to enter the impeller smoothly, reducing the pressure loss and flow rate change of the liquid during the suction process, thereby reducing the possibility of cavitation. This enables the double-suction pump to operate stably when conveying easily vaporized liquids or under harsh suction conditions.
5. Convenient maintenance: The structural design of the double-suction pump takes into account the convenience of maintenance. Usually, the pump body adopts a horizontal split structure, that is, the pump body is divided into upper and lower halves in the horizontal direction. When inspecting and repairing, there is no need to dismantle the inlet and outlet pipes and the motor. You only need to loosen the connecting bolts of the pump body and lift the upper part of the pump body to conveniently inspect, repair and replace the impeller, shaft, seal and other parts. This design greatly shortens the inspection time and reduces the maintenance cost.
The motor drives the impeller to rotate at high speed, forming a low-pressure area in the center of the impeller. The liquid enters from both sides of the impeller (double suction port) at the same time, and after converging, it is thrown to the volute by the impeller. The centrifugal force makes the liquid gain kinetic energy, and the volute converts the kinetic energy into pressure energy, and finally discharges it from the discharge port.
Structural features
- Horizontal center opening of the pump casing: such as the SH type double suction clean water centrifugal pump, there is no need to dismantle the water inlet and discharge pipes and motors during maintenance, which is convenient for inspection and maintenance.
- Symmetrical impeller structure: It is composed of two back-to-back impellers, which is equivalent to two single-suction impellers of the same diameter working at the same time. Under the same impeller outer diameter, the flow rate can be doubled, and the axial forces offset each other, and the operation is relatively stable.
- Diverse shaft seals: BURGMANN mechanical seals or packing seals are selected to ensure long-term operation without leakage.
- Good bearing performance: SKF and NSK bearings are mostly selected to ensure smooth operation, low noise and long service life.
- Flexible installation form: It can be installed separately or horizontally according to the on-site use conditions.
Application areas
- Urban water supply and drainage: It can be used in urban water supply systems to provide a large amount of water for residents' lives and industrial production. It is also suitable for urban drainage projects to discharge sewage, rainwater, etc. to treatment plants or rivers and lakes.
- Farmland drainage and irrigation: In agricultural production, it is used for irrigation and drainage of farmland to meet the water demand of large areas of farmland.
- Industrial field: Such as cooling water circulation, boiler water supply, industrial water supply and drainage in power plants, steel plants, chemical plants, etc., and corrosion-resistant or wear-resistant materials can also be used to transport corrosive industrial wastewater, seawater and rainwater containing suspended matter.
- Water conservancy projects: It is widely used in large-scale water conservancy projects such as the South-to-North Water Diversion Project and various irrigation water supply projects.
