Selection of Sewage Pump
The sewage pump supplier shares with you: In a professional definition, a pump is a power
device that converts the mechanical energy of the prime mover into
the pressure energy and kinetic energy of the fluid, thereby
achieving the directional transport of the fluid. When in use, they
are often named according to their uses, such as submersible sewage
pumps, sludge pumps, metering pumps, etc. The working principles
are different. According to the working principle, it can be
classified as follows:
Vane pumps include centrifugal pumps (single stage, multi-stage),
axial flow pumps, mixed flow pumps, vortex pumps, etc.
Centrifugal pump-The fluid is rotated together with a rotating
impeller, and the pressure energy and kinetic energy of the fluid
are increased by the effect of centrifugal force. The submersible
motor is directly connected to the pump impeller, and the hydraulic
components are composed of the pump casing and the impeller. The
water outlet of the pump casing is radial, and the centerline of
the water outlet is in the same plane as the centerline of the
motor. In order to ensure a stable flow without excessive swirl,
the hydraulic components are designed and manufactured without
sharp edges. The piping flange of the pump water is in accordance
with ISO standards, and the nominal pressure is 1MPa.
Axial Flow Pump-Uses the lift generated by the airfoil blades on
the impeller to rotate the fluid to increase the energy of the
fluid. The axial flow pump is divided into a vertical axial flow
pump and a horizontal axial flow pump. The submersible motor is
directly connected to the pump impeller directly. The hydraulic
components are composed of the pump casing, guide vanes, impeller
and wear ring. The water outlet of the pump casing is an axial
water outlet. In order to ensure a stable flow and no vortex and
bottom vortex in the vertical DC tube, the hydraulic components are
designed and manufactured without sharp edges. In order to ensure
the uniform flow pattern at the suction port of the pump,
anti-swirl facilities are installed at the bottom of the wellbore
to prevent the occurrence of vortex and water flow.
Horizontal Axial Flow Pump-It should be a complete set of
equipment, and all installation accessories such as pipe connection
pipes, shutter doors, guide rods, slings (chains), lifting brackets
and hoists, diving cables, junction boxes (IP65), and monitoring
devices are required. And stainless steel fasteners.
The horizontal axial flow pump adopts the guide rod automatically
combined with the fixed position. The sliding rod bracket is one of
the integral parts of the water pump. The entire weight of the
water pump and the thrust generated during pumping all act on the
flange of the outlet pipe. The horizontal axial flow pump can be
easily moved up and down, and inspection or maintenance personnel
do not need to enter the bottom of the pool.
2. Positive displacement pump
Positive displacement pumps include reciprocating pumps (piston,
plunger, diaphragm), rotary pumps (gear, screw, slide, etc.)
Reciprocating pumps-use periodic changes in the working volume to
transfer fluid and increase its pressure, including piston, plunger
and diaphragm types.
Rotary Pump-Use a pair or several special-shaped rotating bodies,
such as gears, screws or other shapes of rotors, to make a rotating
movement in the housing to convey fluid and increase its pressure.
Self-priming Rotary Pump-It should be suitable for mixed sludge of
primary sedimentation and secondary sedimentation (solid content of
3% ~ 7%), surface dross, settling sand, etc. The sludge contains
fine sand with a particle size of less than 0.15mm about 10 %,
There is no sludge cutting device in the system, which allows the
maximum passage of 60mm incompressible foreign matter, has the
characteristics of non-clogging, abrasion resistance, etc. It is
suitable for conveying high-sand sludge.
3.Other types of pumps
Vane pumps and positive displacement pumps basically include all
common pump types, there are some other types of pumps, such as:
Water ring vacuum pump-Water ring vacuum pump injects a certain
amount of water as a working liquid before starting, and the closed
water ring is formed by the rotation of the star impeller, and the
space between the impeller and the water ring periodically expands
and decreases, forming negative pressure , Inhale the gas and
exhaust, to achieve the purpose of vacuuming.
Jet pump-Uses the suction effect of high-speed jets to suck and
transport liquid, which can play the role of vacuum.
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