Q3/ A three – throw cranks shaft has double - webbed cranks of 150 mm radius set at 120° to each other and equally spaced with a pitch of 500 mm. the rotating masses at crank radius are: No. 1, 30 kg ; No. 2, 40 kg ; No.3, 40 kg. Balance is to be effected by a balance mass attached to the outside web of crank No.1, with a cntre of mass 150 mm from the central plane of the crank and a radius of 225 mm from the centre of the shaft; and also by removing material, at a radius of 750 mm, from a wheel fixed 750 mm beyond the central plane of crank No.3. Determine the masses to be fitted and removed and their angular positions relative to crank No.1.
Q3/ A three – throw cranks shaft has double - webbed cranks of 150 mm radius set at 120° to each other and equally spaced with a pitch of 500 mm. the rotating masses at crank radius are: No. 1, 30 kg ; No. 2, 40 kg ; No.3, 40 kg. Balance is to be effected by a balance mass attached to the outside web of crank No.1, with a cntre of mass 150 mm from the central plane of the crank and a radius of 225 mm from the centre of the shaft; and also by removing material, at a radius of 750 mm, from a wheel fixed 750 mm beyond the central plane of crank No.3. Determine the masses to be fitted and removed and their angular positions relative to crank No.1.
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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Transcribed Image Text:Q3/ A three - throw cranks shaft has double webbed cranks of 150 mm radius set at 120° to each
other and equally spaced with a pitch of 500 mm. the rotating masses at crank radius are: No. 1, 30 kg
; No. 2, 40 kg ; No.3, 40 kg. Balance is to be effected by a balance mass attached to the outside web of
crank No.1, with a cntre of mass 150 mm from the central plane of the crank and a radius of 225 mm
from the centre of the shaft; and also by removing material, at a radius of 750 mm, from a wheel fixed
750 mm beyond the central plane of crank No.3.
Determine the masses to be fitted and removed and their angular positions relative to crank No.1.
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