54100323 design and fabrication of screw conveyor 2-97-03

7/29/2019 54100323 Design and Fabrication of Screw Conveyor 2-97-03

1/24

DESIGN FABRICATION &

TESTING OF SCREW

CONVEYOR

BY

V. DURGA KARTHIK

A. MANOJ KUMAR

G.I MANOJ RAMACHANDRAN


2/24

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.


3/24

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.


4/24

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.


5/24

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


6/24

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.


7/24

TYPESOFSCREWCONVEYORS

Inclined units

Vertical units


8/24

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.


9/24

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.


10/24

II REVIEW


11/24

CLASSIFICATIONOFSCREWCONVEYOR

DEPENDINGUPONTYPEOFFLIGHTUSED

Paddle conveyor screw

Ribbon flight conveyor screw

Helicoid flight conveyor screw

Sectional flight conveyor screw


12/24

PADDLECONVEYORSCREW


13/24

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.


14/24

RIBBONFLIGHTCONVEYORSCREW


15/24

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


16/24

SECTIONALFLIGHTCONVEYORSCREW


17/24

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


18/24

HELICOID FLIGHT CONVEYOR SCREW


19/24

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.


20/24

U TROUGH


21/24


22/24


23/24


24/24

54100323 design and fabrication of screw conveyor 2-97-03

Documents