Pumped Storage Electric Double- Suction Pump

The booster electric double-suction pump is a type of open centrifugal pump with a double-suction impeller structure, driven by an electric motor. It is specifically designed for the purpose of pressurizing and transporting liquids. The key feature is that the liquid is simultaneously drawn in from both sides of the impeller (double suction), which enables it to achieve twice the flow rate of a single-suction pump at the same rotational speed, while maintaining high efficiency and stable head.

Double-suction impeller
The impeller is a symmetrical impeller at both ends and has two directions of water intake. It has excellent anti-cavitation performance and is suitable for high flow and high head applications.
Double-suction pump casing
The inlet and outlet of the pump are horizontally centered in the same direction, which is conducive to the installation and disassembly of the inlet and outlet pipes of the pump, making maintenance convenient and without the need for disassembly.
Sealing ring
Adding two sealing rings on both sides of the impeller inlet and outlet can increase the backflow resistance and reduce internal leakage.

Horizontal split (segmented) pump body: The pump body is divided into upper and lower halves along the horizontal axis and is connected by bolts. During maintenance, only the upper part needs to be removed, without disturbing the inlet and outlet pipelines and the motor. The rotor (impeller, shaft, bearing) can be lifted out as a whole, resulting in extremely high maintenance efficiency.
Double suction impeller: There are suction inlets on both sides of the impeller, and the liquid enters from both sides simultaneously, with large flow rate and self-balanced axial force. The impeller usually adopts a closed structure, with blades in a backward curved shape, and has high hydraulic efficiency.
Motor direct coupling (elastic coupling): The motor is directly coupled to the pump shaft through an elastic coupling, with smooth transmission and high alignment requirements but high transmission efficiency. Longer couplings can also be used for maintenance in large units.
Bearings and lubrication: Bearings usually use rolling bearings (deep groove ball bearings or angular contact ball bearings), lubricated with grease or thin oil. The bearing housing is located at both ends of the pump body for easy maintenance.
Seals: Commonly used are packing seals or mechanical seals. Mechanical seals have less leakage, longer lifespan, and are suitable for pressurized water supply systems with strict leakage requirements. Packing seals are cost-effective and simple to maintain, and are suitable for situations with poorer water quality.

Double-injection flow: The liquid enters from the suction ports on both sides of the pump body (usually in a horizontal direction) and flows separately to the two suction ports of the impeller. The double-suction structure ensures that the axial thrust on both sides of the impeller is basically balanced, reducing the axial load on the bearings.
Impeller work: The impeller rotates at high speed under the drive of the motor. The blades apply centrifugal force to the liquid, converting mechanical energy into the kinetic energy and pressure energy of the liquid. The liquid is expelled from the center of the impeller to the outer edge.
Casing collection and boosting: The high-speed liquid ejected from the impeller enters the pump body's casing (exhaust chamber). The flow channels of the casing gradually expand, converting kinetic energy into pressure energy to achieve boosting. The liquid is finally discharged from the outlet flange at the top of the pump body.
Boosting effect: Through the high-speed rotation of the impeller and the expansion effect of the casing, the pressure at the pump outlet is significantly higher than the inlet pressure, achieving the purpose of "boosting". The boosting value (head) depends on the impeller diameter, rotational speed, and blade angle.

Municipal water supply and pipeline pressure boosting: Pressure boosting at the city water treatment plant before discharge, mid-way pressure boosting in the pipelines, and secondary water supply pressure boosting in residential areas to ensure water pressure for high-rise users.
Fire protection system pressure stabilization and boosting: Main pumps or pressure stabilizing pumps at the fire pump station to provide continuous and stable pressure for fire hydrant systems and sprinkler systems.
Industrial circulating water system: Cooling water circulation boosting in power plants, steel mills, and chemical plants; chilled water/cold water circulation for air conditioning refrigeration systems.
Agricultural irrigation and long-distance water transportation: Water lifting and pressure boosting in large irrigation areas; intermediate pressure boosting in long-distance water transportation pipelines.
Ship and marine engineering: Ballast water system, fire water system, cooling water system.
Mine drainage and underground water supply: Pressure boosting of mine drainage systems; supply of production water for underground operations.

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