VA shaft have three eccentrics, each 75 mm diameter and 25 mm thick, machined in onepiece with the shaft. The central planes of the eccentric are 60 mm apart. The distance of thecenters from the axis of rotation are 12 mm, 18 mm and 12 mm and their angular positionsare 120° apart. The density of metal is 7000 kg/m. Find the amount of out-of-balance forceand couple at 600 rpm. If the shaft is balanced by adding two masses at a radius 75 mm andat distances of 100 mm from the central plane of the middle eccentric, find the amount ofthe masses and their angular positions.

Answered: Image /qna-images/answer/3d2370be-7441-483a-93e1-60b2eb7f8751.jpg

Answered: at distances of 100 mm from the central…

at distances of 100 mm from the central plane of the middle eccentric, find the amount of he masses and their angular positions.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter4: Numerical Analysis Of Heat Conduction

Section: Chapter Questions

Problem 4.49P

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Question

VA shaft have three eccentrics, each 75 mm diameter and 25 mm thick, machined in one
piece with the shaft. The central planes of the eccentric are 60 mm apart. The distance of the
centers from the axis of rotation are 12 mm, 18 mm and 12 mm and their angular positions
are 120° apart. The density of metal is 7000 kg/m. Find the amount of out-of-balance force
and couple at 600 rpm. If the shaft is balanced by adding two masses at a radius 75 mm and
at distances of 100 mm from the central plane of the middle eccentric, find the amount of
the masses and their angular positions.

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