MANAGING CONVEYOR LIFE
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Joined: Sep 2010
22-12-2010, 04:08 PM
SUBHENDRA SEKHAR MISHRA
MANAGING CONVEYOR LIFE SAND.ppt (Size: 716 KB / Downloads: 93)
Benefits of Conveyor systems
safely transport materials from one level to another, which when done by human labour would be strenuous and expensive.
can be installed almost anywhere, and are much safer than using a forklift or other machine to move materials.
can move loads of all shapes, sizes and weights
variety of options available for running conveying systems, including the hydraulic, mechanical and fully automated systems, which are equipped to fit individual needs.
What is a conveyor?
A conveyor moves material.
A conveyor moves cardboard boxes, wood boxes, metal boxes and plastic boxes.
Conveyors Can move materials by gravity or power.
A conveyor can do more. It can move boxes UP against gravity . . . DOWN . . . or HORIZONTAL on a moving belt.
The belt is moved by electric power. This is called a BELT CONVEYOR.
What is a belt conveyor?
It is a machine with a moving BELT. The machine is made with these parts:
This is a conveyor bed. It comes in many sizes-many lengths-many widths.
A pulley is like an iron pipe. Pulleys are put on each end of the bed.
The pulleys are as wide as the "bed". Each pulley has a steel shaft through it.
The shaft turns on a bearing . . . and the pulley turns with the shaft.
What is a bearing?
When two pieces of steel touch each other; they cannot turn easily without bearings.
Bearings use little steel balls to keep the pulley shaft and the conveyor bed from rubbing together.
Now the shaft can turn easily.
What is a Sprocket?
A sprocket is a metal "wheel" with "teeth" on the outside.
. . . The motor is connected to the reducer with a V-Belt (like the fan belt in your car) or a "C" Face Coupling.
The reducer is connected to the drive pulley with a chain . . . Now the Drive Pulley turns slower.
All those parts (the motor, the speed reducer, and the drive pulley) are called:
But what about the tail pulley?
The tail pulley is located at the tail end of the conveyor and it turns freely.
BELT MOVES AT SPEED OF 20 MTR PER MINUTE
This is best speed to move objects from one place to another.
A person can walk about 4 miles per hour. If they were carrying a box they would walk much slower. Conveyors move boxes at about the same speed as a person carrying them. This is about 20 mtr per minute (or about 3/4 of a mile per hour).
THE SNUB IDLER
The Snub Idler is closer to the drive pulley.It makes the belt hug more of the drive pulley surface.The Snub Idler is ADJUSTABLE.It is ADJUSTABLE ON BOTH SIDES of the conveyor. (Each side of snub idler can be adjusted independently).Reason - The Snub Idler is used to steer the belt.
(Used with Horizontal Belt Conveyors)
A. When belt movement is REVERSIBLE (on conveyors 40 ft. long or more)
B. When overall length of conveyor cannot change (belt take up by tail pulley increases conveyor length)
· Drive pulley now "pulls" belt in either direction
Take-up pulley can now be used to take-up belt.