Download Centrifugal pump

Students:Bhumil Patel (141130105029)
Maulik Patel (141130105037)
Mayur Patel (141130105038)
Pankit Patel (141130105043)
Faculty Name:Bhavna soni
Centrifugal pump
Centrifugal pump
 Centrifugal pumps are a sub-class of dynamic
axisymmetric work-absorbing turbo machinery
 Centrifugal pumps are used to transport fluids by the
conversion of rotational kinetic energy to the
hydrodynamic energy of the fluid flow.
 The rotational energy typically comes from an engine
or electric motor.
 The fluid enters the pump impeller along or near to
the rotating axis and is accelerated by the impeller,
flowing radially outward into a diffuser
or volute chamber (casing), from where it exits.
 The reverse function of the centrifugal pump is a water
turbine converting potential energy of water pressure
into mechanical rotational energy.
Centrifugal pump
working
 General explanation: Like most pumps, a centrifugal pump
converts rotational energy, often from a motor, to energy in
a moving fluid.
 A portion of the energy goes into kinetic energy of the
fluid. Fluid enters axially through eye of the casing, is
caught up in the impeller blades, and is whirled
tangentially and radially outward until it leaves through all
circumferential parts of the impeller into the diffuser part
of the casing.
 The fluid gains both velocity and pressure while passing
through the impeller.
 The doughnut-shaped diffuser, or scroll, section of the
casing decelerates the flow and further increases the
pressure.
Centrifugal pump
Principle of operation
 The impeller of such a pump is magnetically coupled
with the motor, across a separation wall which is
resistant to the fluid pumped.
 The motor drives a rotor carrying one or several pairs
of permanent magnets, and these drag around a
second pair(s) of permanent magnets attached to the
pump impeller.
Centrifugal pump
advantages
 Small in size, space saving & less capital costs
 Easy for maintenance
 No danger creates if discharge v/v is closed while
starting
 Deal with large volume
 Able to work medium to low head
 Able to work medium to low viscous fluid
Centrifugal pump
disadvantages
 Extra priming P/P requires.
 Cannot be able to work high head.
 Cannot deal with high viscous fluid.
The Dangers of Letting Centrifugal
Pump
 Pump gland & bearing damage due to overheating
 Shaft misalignment
 Seal ring damage
 Wear ring damage
 Impeller damage
centrifugal pumps
Problems
 Cavitation—the net positive suction head (NPSH) of
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the system is too low for the selected pump
Wear of the impeller—can be worsened by suspended
solids
Corrosion inside the pump caused by the fluid
properties
Overheating due to low flow
Leakage along rotating shaft
Lack of prime—centrifugal pumps must be filled (with
the fluid to be pumped) in order to operate
Centrifugal Pump
Applications
 Beverages – fruit juices, fruit concentrate, high
fructose corn syrup, liquor, wine, beer
 Candy – corn syrup, chocolate, sugar solutions
 CIP – caustics, enzyme cleaners, solutions
 Cosmetics – lotions, soaps, shampoo
 Dairy – cream, ice cream, buttermilk, milk, whey
 Oils – salad, drying, cooking
 Personal Care – cologne, mouthwash
 Pharmaceutical
Thank
you