Why the tension differs from slack to tight side of the belt conveyor?

Why the tension differs from slack to tight side of the belt conveyor?

what causes slack side and tight side is the difference in tension induced due to friction between the pulley and belt. If pulleys are rotating in clockwise direction, relative motion is anticlockwise for belt. hence friction will be in clockwise direction where ever is considered on belt.

What is the relation between tight side tension and slack side tension?

Tight side tension is created on that section of belt approaching the driveR pulley. Slack side tension is created on the section of belt approaching the driveN pulley. These tensions are illustrated as follows: Tight side tension plus slack side tension is equal to to total tension (TT).

Why tight side of the belt should be at the bottom side of the pulley?

When we keep the tight side as the lower side then more area of belt makes contact with the pulley which is less likely to slip because of friction. So it is mostly arranged in such a way that the lower side of the belt (especially in case of flat belts) is the tight side.

What is the relation between tight side and slack side for a flat belt?

The ratio of tension on the tight side to that on the slack side in a flat belt drive is. (a) proportional to the product of coefficient of friction and lap angle.

Which side of the belt is to be kept as tight side?

Generally, the lower side is kept “Tight side” and upper side is kept as “Slack side” with the belt drives having small driving pulley and big driven pulley. Why? Answer: Power transmission in belt drive depends on angle of lap and frictional grip between belt and pulley.

Why is the slack side of a belt on the top?

If slack is on the upper side of the pulley, the hanging belt increases the angle of contact and hence the grip between rope and pulley. It is lowering the chance of slippage and improve the efficiency.

How do you select tight side and slack side in the belt drive?

If the slack side is above the tight side, the wrap angle increases due to the deflection, while in the opposite case the wrap angle is reduced. To ensure that wrapping is not reduced under load, the slack side should be arranged over the tight side!

What is the relationship between tight tension and slack tension for a flat belt passing over a stationary pulley?

When a belt is first fitted to a pair of pulleys, an initial tension To is given to the belt when the system is stationary. When transmitting power, the tension on the tight side increases to T1 and that on the slack side decreases to T2.

Why the slack side of the belt of a horizontal belt drive is preferable to place on the top side?

How do you measure tension on a belt drive?

To conclude, the total belt tension as calculated above is usually expressed as a unit tension for reference against various information tables. This is done by dividing the total calculated tension by the belt width. Therefore Unit Tension = Belt tension (N) / Belt width (mm) giving units of N/mm width.

Why the slack side of the belt of a horizontal belt drive is preferable to be placed on the topside?

When the two pulleys are stationary the tension in the belt is called tension?

Initial tension
Initial tension (To): When a belt is first fitted to a pair of pulleys, an initial tension To is given to the belt when the system is stationary. When transmitting power, the tension on the tight side increases to T1 and that on the slack side decreases to T2.

Why does the drive belt stretch on the tight side?

When the belt moves over the pulley to transmit power, the tension in the tight side is more than than the tension in slack side. As the belt material is elastic, it elongates more on tight side than on slack side, resulting in unequal stretching on two sides of the drive.

Why is there a slack side on a flat belt drive?

Why Slack Side Is On Upper Side Of Flat Belt Drive. The slack side is the side where tension on a belt is low compared to the other side. In a flat belt drive, driver pulley pulls the belt through the bottom side and deliver it on the opposite side (upper side), so the top side is always loose.

How to tell if belt tension is slack or tensioned?

Clearly the tension in the top has to pull on the bottom just as hard, otherwise the belt would stretch. The “slack” side is not slack – even if the pulleys are not turning, there is a tension there. Hook one roller/pulley/end/whatever to a spring and you’d see the spring extend under the force.

What factors affect the tension of the belt?

The tension in the two spans of the belt (slack side and tight side) is influenced by the pre-tensioning of the belt ( initial tension ). The stronger the belt is already under tension in the load-free state by the so-called pre-load, the higher the belt tension will be during operation under load.