uilibrium speed co

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
In a spring-loaded governor
of the Hartnell type, the
lengths of the horizontal and
the vertical arms of the bell-
crank lever are 40 mm and 80 mm respectively.
The mass of each ball is 1.2 kg. The extreme
radii of rotation of the balls are 70 mm and 105
mm. The distance of the fulcrum of each bell-
crank lever is 75 mm from the axis of rotation of
the governor. The minimum equilibrium speed is
420 rpm and the maximum equilibrium speed is
4% higher than this. Neglecting the obliquity of
the arms, determine the
(i) spring stiffness,
(ii) initial compression, and
(iii) equilibrium speed corresponding to radius
of rotation of 95 mm.
Transcribed Image Text:In a spring-loaded governor of the Hartnell type, the lengths of the horizontal and the vertical arms of the bell- crank lever are 40 mm and 80 mm respectively. The mass of each ball is 1.2 kg. The extreme radii of rotation of the balls are 70 mm and 105 mm. The distance of the fulcrum of each bell- crank lever is 75 mm from the axis of rotation of the governor. The minimum equilibrium speed is 420 rpm and the maximum equilibrium speed is 4% higher than this. Neglecting the obliquity of the arms, determine the (i) spring stiffness, (ii) initial compression, and (iii) equilibrium speed corresponding to radius of rotation of 95 mm.
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