Monthly Archives: October 2020

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Poly v belt drives

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Elastic belt Poly-V

Poly v belts have triangular section longitudinal ribs. Thanks to the reduced thickness, these belts are very flexible and can be wind up on very small diameters. Poly v belts can achieve higher peripheral speed than v belts.

Poly V belt characteristics

  • Standard profiles: H – J – K – L – M
  • Static Conductive (ISO 1813)
  • Temperature: -20/+80 °C
  • Tensile member: Polyester
  • Compound: Chloroprene
  • Available belts with Aramid tensile members for heavy applications

Benefits

  • Compact dimensions
  • High Flexibility
  • High peripheral speed
  • High efficiency
  • Low noise
  • Possibility of using flat pulleys reducing the cost of the system

Poly v belt pulleys for mounting taper bushing are designed and manufactured with extreme accurancy to ensure optimal lifetime and performance of the transmission systems.

This article comes from sitspa edit released

News

Drive Belt : Types, Material, Applications, Advantages, Disadvantages

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What is a drive belt?

The drive belt is a flexible element of a mechanical system. It is used to transfer the power from one System to another System.

Types of drive belt:

There are five different kinds of drive belt can be found and those are:

  • Open drive belt
  • Closed or crossed drive belt
  • Fast and loose cone pulley
  • Stepped cone pulley
  • Jockey pulley drive

Open drive belt:

In this, the shafts rotate in the same direction that means the direction of rotating is the same as driving and driven pulley.

The shafts are arranged in the parallel direction.

If the shafts are having a more distance between driver and driving pulley then there must be the upper side will be slack side and the below side will be the tight side.

Crossed drive belt:

Here in the crossed drive belt the transmitted power is more but there is a problem that it can not run faster. If so then rubbing between belts may wear and tear.

In this, the shafts rotate in the opposite direction. At the junction side, it rubs and therefore it wears and tears off.

And if you don’t want to wear and tear then place more distance between pulley and run at low speed.

Fast and loose cone pulley:

As the name indicates fast and loose pulley it means there are two pulleys in it.

How are these two pulleys placed in it?

The fast pulley is mounted on a shaft with keyed joint and the loose pulley runs freely on the shaft and it is incapable of transmitting any power.

Another term in that is when multiple machines are working from a single power source then in this condition, each machine has provided with this fast and loose cone pulley.

Stepped cone pulley:

This is also known as speed cone.

Here in stepped cone pulley, there are more pulleys attached of different diameter one adjacent to another.

Stepped cone pulleys are used where they have to change gear or speed of driven shaft change frequently like a machine (Lathe, Milling and more).

The diameter of the driving and driven pulley is such that when we wanted to shift to another pulley the same belt will operate.

Jockey pulley:

Jockey pulleys are used in the steering section of the system.

Jockey pulley is like an idle pulley and which is used for increasing the angle of contact in an open drive belt.

Hence increasing the angle of contact steer to the increased power transmission capacity of the drive.

This one pulley is mounted nearer to the smaller pulley and we can say also this is placed on the slack side of the belt.

This article comes from learnmechanical edit released