Pengenalan singkat mengenai apa itu Belt Conveyor. Disertai juga dengan penjelasan per bagian-bagian Belt Conveyor dan cara kerjanya serta drive pulley pada Belt Conveyor ini
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Timing BeltFull description
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CONVEYER BEL BELT T DESIGN DESIGN
INTRODUCTION TO CONVEYOR SYSTEM
A conveyor system is a common piece of mechanical handling equipment that moves materials from one location to another another.. Conveyors are especially useful in applications involving the transportation of heavy or bulky materials. Conveyor systems allow quick and efficient transportation for a wide variety of materials, which make them very popular in the material handling and packaging industries.
A conveyor belt (or belt conveyor) consists of two or more pulleys, with a continuous loop of material - the t he conveyor belt - that rotates about them. One or both of the pulleys are powered, moving the belt and the material on the belt forward. The powered pulley is called the drive pulley while the unpowered pulley is called the idler. There are two main industrial classes of belt conveyors; 1. 2.
General material handling such as those moving boxes along inside a factory. Bulk material handling such as grain, grain, coal, ores, ores, etc. generally in outdoor locations.
In addition there are a number of commercial applications of belt conveyors such as those in grocery stores, airports etc.
1. Horizontal Conveyor
Discharges at intermediate points through fixed trippers or at end
2. Inclined
Will carry up varying slopes which depend upon the nature of material. Inclined or retarding conveyor for lowering material gently down slopes
DESIGN OF CONVEYOR BELT Components of conveyor belt
DESIGN PROCEDURE 1.
Size of material. 1. 2.
2.
Selection of belt speed 1.
3.
4.
5.
Maximum lump size of material is considered. Material and width of belt is considered depending on the material. Factors : lump size factor, abrasiveness factor, air borne factor.
Safe angle of Inclination/Declination & angle of surcharge of material. Type of supporting idlers and their spacing Calculations of tensions in belt for various conditions.
6.
7.
8. 9. 10.
11.
Selection of belt with breaking strength = (maximum operating tension X minimum factor of safety). Drive power with transmission losses and sources of power. Determining various pulley sizes. Selection if proper bearings for duty conditions. Location of take up and take down tensions. Location of hold back/brake with braking force and torque.
BELT •
•
Selection of belt should be made depending on the properties of materials. Various type of material properties are shown below
High temperature
Non-abrasive
Sticky
Abrasive
Mildly corrosive
Easily degradable
Highly corrosive
Sharp abrasive
Explosive or creating harmful dust
Very abrasive
Very dusty
Mildly abrasive
Inflammable Inflammabl e Hydroscopic
Oily .or liable to react with rubber products
PULLEYS
PULLEYS: Based on percentage tensile force
(ratio between the working tensile force and maximum allowable tensile force the selected belt), diameters of pulleys shall be selected .
of
The drive pulleys may be lagged, wherever necessary, necessary, to increase the coefficient of friction between the belt and the drive pulley.
CHUTES
Chutes are used to discharge and load material from conveyor. Chutes should be carefully designed. Placing of chutes should be carefully done depending on the calculated trajectory of the falling material
FRAMES OF HEAD AND TAIL The following are the simple designs of head and tail frames which can be selected according to the requirement
IDLERS CARRYING IDLERS 1. 2. 3. 4. 5. 6.
Catenary type Garland type Impact cushioned idlers Transition idlers Training idlers Fixed guide idler
RETURN IDLERS 1. 2. 3.
Normal return idlers Training Tra ining return idlers Self-cleaning return idlers
Belt turner Belt cleaner Ladders and spiral chutes Ploughs Trippers
DRAWING
Calculation of various conditions and selection of belt width and its material, selection of pulleys, selection of idlers, selection of power motors, selection of frames and various accessories mentioned and drawing a conveyer belt system completes the project.
