54100323 Design and Fabrication of Screw Conveyor 2-97-03
Transcript of 54100323 Design and Fabrication of Screw Conveyor 2-97-03
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DESIGN FABRICATION &
TESTING OF SCREW
CONVEYOR
BY
V. DURGA KARTHIK
A. MANOJ KUMAR
G.I MANOJ RAMACHANDRAN
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ABSTRACT
The aim of the project is to Design and fabrication of screw
conveyor to convey the sewage sludge.
A screw conveyor mechanism mounted within the trough assembly.
One end of the screw conveyor is mounted on the trough assembly.
A drive shaft is provided for rotating the screw conveyor beingconnected to the outer end of the screw conveyor.
The motor is connected to the end of the drive shaft which is
connected to the screw conveyor.
Top portion of the screw conveyor is made openable for the
maintenance.
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SCOPE
Saving of labour and time.
To increase the output:
With the help of conveyors more work can be done
with a given floor space, blocks are avoided. Reducing personal hazardous:
The enclosing trough can be made tight enough to
contain toxic, dust and vapours.
Cleaning is made easy as the top surface isopenable.
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LITERATURE SURVEY
A conveyor system is a common piece of
mechanical handling equipment that moves
materials from one location to another.
Conveyors are especially useful in applications
involving the transportation of heavy or bulk
materials.
Conveyor systems allow quick and efficient
transportation for a wide variety of materials, which
make them very popular in the material handlingand packaging industries.
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TYPESOFCONVEYORSYSTEMS
Gravity roller conveyor
Gravity skatewheel conveyor
Belt conveyor
Wire mesh conveyors
Plastic belt conveyors
Bucket conveyors Flexible conveyors
Vertical conveyors
Spiral conveyors
Vibrating conveyors
Pneumatic conveyors
Belt driven live roller conveyors Lineshaft roller conveyor
Chain conveyor
Screw conveyor
Overhead conveyors
Automotive conveyors
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SCREWCONVEYOR
Screw conveyors have been a popular material
handling mechanism throughout history.
One type of screw conveyor, perhaps the best
known is the Archimedian screw contained within a
tube to raise water.
The Archimedean screw or the screw pump is a
machine historically used for transferring water from
a low-lying body of water into irrigation ditches.
They are used in many bulk handling industries.
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TYPESOFSCREWCONVEYORS
Inclined units
Vertical units
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INCLINEDUNITS
Inclined screw conveyors, in general handle
products that can be conveyed in horizontal screw
conveyors.
Being compact, say contained and fully enclosed
they can be readily applied in congested areas.
Feature insuring sanitation and ease of cleaning
are available.
For inclines of about 20 degrees or less, conveyor
screws of regular pitch operating in troughs are
usually employed.
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VERTICALUNITS
A vertical screw elevator is a unit that conveys
material vertically.
These units can satisfy many conveying problems
and have the further advantages of being
compacted, requiring less space than other forms
of elevating equipment.
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II REVIEW
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CLASSIFICATIONOFSCREWCONVEYOR
DEPENDINGUPONTYPEOFFLIGHTUSED
Paddle conveyor screw
Ribbon flight conveyor screw
Helicoid flight conveyor screw
Sectional flight conveyor screw
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PADDLECONVEYORSCREW
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This consists of a series of cut and folded flights
mounted on the central revolving shaft or pipe.
In this the material is intentionally tumbled and
sheared as it is advanced along the casing by the
pitch of the screw at every revolution.
Friction between the material and the revolving
spiral tends to carry the material up one side and
around with the blade.
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RIBBONFLIGHTCONVEYORSCREW
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In this type of conveyor screw a steel bar rolled to
form a continuous helical ribbon flight fastened to
the pipe or shaft by steel supporting lugs welded at
spaced intervals.
Variation of diameter, pitch, flight width or thickness
can be furnished. Also, this screw can be furnished
with either continuous or sectional flights, lap or butt
welded together.
These are recommended for handling, stickymaterials such as molasses, tar or substances
likely to build upon screw
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SECTIONALFLIGHTCONVEYORSCREW
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Sectional flight conveyor screws are made of
individual flights; each blanked from a flat steel
plate and formed into helix
The flights are butt welded together and fastened tothe pipe, or shaft by intermittent or continuous
welds with or without formed steel end lungs.
Sectional flight conveyor screws are
interchangeable with helical flight conveyor screwof the same diameter and shaft size.
When desired, sectional flights may be continuous
welded to the pipe on one or both sides, thus
providing exceptionally rugged construction for themost severe conveying application
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HELICOID FLIGHT CONVEYOR SCREW
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The helicoids flight conveyor screw is made of a
helix, formed by flat steel bar and mounted on a
pipe or shaft.
The helix, formed by special rolling equipment to
the required diameter, pitch and thickness, is a
smooth, continuous one- piece flight.
By virtue of its one-piece construction, it possesses
superior strength. The absence of laps, rivets orwelds on the carrying face of the flight promotes
and maintains cleanliness and reduces wear.
Helicoids flighting is made with regular pitch
approximately equal to the diameter. It can also befurnished with other than regular pitch and in a wide
range of diameter, thickness and lengths to meet
the most exacting requirements.
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U TROUGH
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