Single-Suction Pump Manufacturer: A Brief Introduction to Single-Suction Pumps
Release time:
2021-06-27
Source:
A single-suction pump is a type of pump in which fluid is drawn in at one end and discharged at the other. The single-stage, single-suction centrifugal pump is the simplest form of centrifugal pump. “Single-stage” means that the pump contains only one impeller, while “single-suction” indicates that water is drawn into the impeller from one side. Such pumps generally have relatively low flow rates and are typically small-sized units.
A single-suction pump is a type of pump in which fluid is drawn in at one end and discharged at the other. The single-stage, single-suction centrifugal pump is the simplest form of centrifugal pump. “Single-stage” means that the pump contains only one impeller, while “single-suction” indicates that water is drawn into the impeller from one side. Such pumps generally have relatively low flow rates and are typically small-sized units.
The single-suction pump features horizontal axial suction and upward radial discharge. The pump adopts a suspended structure, allowing the rotor assembly to be removed for maintenance without dismantling the inlet and outlet piping. The pump is coupled to the motor via a standard flexible coupling or an extended flexible coupling, and its shaft seal employs a soft packing seal. The bearings are single-row radial ball bearings lubricated with grease. When viewed from the motor end, the pump rotates in a clockwise direction.
When a single-suction pump is started, the pump shaft drives the impeller to rotate at high speed, forcing the liquid that has been pre-filled between the impeller blades to rotate as well. Under the action of inertial centrifugal force, the liquid moves radially from the center of the impeller toward its outer periphery. During its passage through the impeller, the liquid gains energy: its static pressure increases, and its velocity rises. As the liquid leaves the impeller and enters the pump casing, the gradually widening flow passages cause it to decelerate; part of its kinetic energy is converted into static pressure, and the fluid then flows tangentially into the discharge piping. Thus, the volute-shaped pump casing not only collects the liquid discharged from the impeller but also serves as an energy-conversion device. At the same time that the liquid is flung outward from the impeller center, a low-pressure zone is created at the center, and the potential-energy difference between the liquid surface in the reservoir and the impeller center draws more liquid into the impeller center. With the continuous rotation of the impeller, the liquid is continuously drawn in and discharged. The mechanical energy imparted to the liquid in a centrifugal pump is manifested as an increase in static pressure.
Single-suction pump
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