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Anonymous Poster

How to Calculate Tension on the Guide Roller Below the Rope

11/18/2010 3:38 PM

A steel rope fixed one end passing through 3 nos guide pulleys (as in the below picture but pulleys are very close to wire rope)and pulling at a tension of 2 tons.how to calculate the vertical tension applied on the below pulley, the distance between horizontal pulleys are 120 cms apart and below pulley is 5 mm upward the axis of wire rope and centre of horizontal pulleys.

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Tornado
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#1

Re: How to Calculate Tension on the Guide Roller Below the Rope

11/18/2010 3:59 PM

The pic didn't show, but let θ be the angle between horizontal and the slope of the 60-cm strands. Then F = 2 x 4000lb x sin θ.

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Anonymous Poster
#2
In reply to #1

Re: How to Calculate Tension on the Guide Roller Below the Rope

12/03/2010 1:04 PM

Attached fig first one is 2 deg deflection and fig 2 8deg deflection

linar pull is 136 tons
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Tornado
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#3
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Re: How to Calculate Tension on the Guide Roller Below the Rope

12/03/2010 2:02 PM

2 x 136T x sin 2° ≈ 9.5T.

2 x 136T x sin 8° ≈ 37.9T.

(The pix are turned 90° from the original description, and the cable tension changed.)

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