DESIGN & ANALYSIS OF SCREW CONVEYOR

This PPT includes design steps ,analysis and fabrication of screw conveyor

1. By KOKALA VENKATESH (12k81A0388) J BHARADWAJ (12k81A0378) K RAHUL (12k81A0384) DESIGN AND FABRICATION OFSCREW CONVEYOR

2. INTRODUCTION OF SCREW CONVEYOR Screw conveyors are widely used for transporting and/or elevating particulates at controlled and steady rates. They are used in many bulk material applications in industries ranging from industrial minerals, agriculture (grains), pharmaceuticals, chemicals, pigments, plastics, cement, sand, salt and food processing. They are also used for metering (measuring the flow rate) from storage bins and adding small controlled amounts of trace materials such as pigments to granular materials or powders .

3. COMPONENTS OF SCREW CONVEYOR

4. Types of Screw Flight

5. DESIGN CONSIDERATIONS

6. DESIGN CALCULATIONS SPEED CALCULATION

7. MATERIAL DISCHARGE CALCULATIONS

8. POWER CALCULATIONS

9. POWER REQUIRED TO MOVE THE MATERIAL HORIZONTALLY

10. POWER REQUIRED TO OPERATE UNLOAD SCREW

11. POWER REQUIRED FOR INCLINED SCREW

12. FREE BODY DIAGRAM OF SCREW CONVEYOR From the diagram we can see free body diagram of the screw conveyor, where the various loads on the conveyor are shown. Mainly four forces are acting on the screw, they are Torsional force-F.T Pulley force-F.P Weight of the gear box mounted on the shaft—F.W Bending force-F.B

13. FABRICATION OF SCREW CONVEYOR Fabrication Of Flight Fabrication of conveyor screw is crucial component, conveyor screw is the series of flights which are TIG welded on the pipe of required dimension The circular discs with slits as shown fig. are made into flights using special rolling machines or CNC machines

14. The rest other components of the screw conveyor like troughs, trough ends, covers, shafts, clamps, supporting feet, hopper etc. are fabricated (welding, grinding, lathe ) according the requirement of the material to be conveyed. The spherical bearing are used at the loading and unloading side of the shaft. All the parts are assembled together to make screw conveyor

15. CONCLUSION The project title “DESIGN AND FABRICATION OF SCREW CONVEYOR” explain the design and manufacturing of the screw conveyor, basic application of which is to transport bulk material for a required distance horizontally. The project gives the detailed information about various factors that we take into account before designing and selecting different components, which form a part of a screw conveyor, it also gives the details of assembly as per the standard procedure employed in the industry. Moving ahead from the designing stage this project gives the detailed account of the fabrication of the screw conveyor and welding techniques and maintenance for the better performance for the longer life Finally the project highlights the main advantage of screw conveyor and its superiority over other conveyor design