Double- drum winder
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question
A double-drum winder is used as a stage hoist for the sinking of a vertical shift. The stage is suspended in the vertical shaft by two winding ropes in double purchase, the fixed ends being anchored in the headgear. Each rope has a strength of 890 kN when new, and a mass of 5.38 kg/m. The empty stage has a mass of 18360 kg. The minimum factor of safety permitted for ropes is 5 at discard, but allowance must be made for 5% deterioration before discard. The shaft is being sunk to a depth of 1830 m below the headgear sheaves.
Calculate the maximum mass load that can be placed on stage, including persons and material.

Transcribed Image Text:Double-
drum
winder
stage
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