a) The length of the arms of a Porter governor is 300mm long. The upper and lower 10 arms are pivoted to links at 50mm and 60mm, respectively, from the axis of the rotation. The mass of each ball is 5kg and the sleeve is of mass 60kg. The frictional force on the sleeve is 35 N.Determine speed range for extreme radii of rotation of 120mm and 150mm.

a) The length of the arms of a Porter governor is 300mm long. The upper and lower 10 arms are pivoted to links at 50mm and 60mm, respectively, from the axis of the rotation. The mass of each ball is 5kg and the sleeve is of mass 60kg. The frictional force on the sleeve is 35 N.Determine speed range for extreme radii of rotation of 120mm and 150mm.

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

See similar textbooks

Similar questions

Each arm of aporter govern or is 250 mm long The uppe r and ower arms are pivoted at 40mm and 50 mm respectively from axis of rota tion Each ball has mas s Df 5 kg and the sleeve mass is 50kg The friction force on the sleve is 40 N. Determine the range of the speed of governor for extreme radii of rota tion of 125 mm and 150 mm
4. A loaded governor of the Porter type has equal arms and links each 250 mm long. The mass of each ball is 2 kg and the central mass is 12 kg. When the ball radius is 150 mm, the valve is fully open and when the radius is 185 mm, the valve is closed. Find the maximum speed and the range of speed. If the maximum speed is to be increased 20% by an addition of mass to the central load, find what additional mass is required. [Ans. 193 r.p.m.; 16 r.p.m.; 6.14 kg]
a. Each arm of a Porter governor is 200 mm long and is hinged at a distance of 40 mm from the axis of rotation. The mass of each ball is 1.5 kg and of the sleeve 25 kg. When the links are at 30° to the vertical, the sleeve begins to rise at 260 rpm. Assuming that the friction force is constant, find the maximum and minimum speeds of rotation when the inclination of the arms to the vertical is 45°. b. The four arms of a porter governor is 250 mm long. The upper and lower arms are pivoted to links 40 mm and 50 mm respectively from the axis of rotation. Each ball has a mass of 5 kg and the sleeve mass is 50 kg. The force of friction on the sleeve of the mechanism is 40 N. Determine the range of speed of the governor for extreme radii of rotation of 125 mm and 150 mm. Consider the force diagrams attached.
A loaded governor of the Porter type has equal arms and links each 250 mm long. The mass of eachball is 2 kg and the central mass is 12 kg. When the ball radius is 150 mm, the valve is ful open andwhen the radius is 185 mm, the valve is closed. Find the maximum speed and the range of speed. If themaximum speed is to be increased 20% by an addition of mass to the central load, find what additionalmass is required?
The arms of a Porter governor are each 250 mm long and pivoted on the governor axis. The mass of each ball is 5 kg and the mass of the central sleeve is 30 kg. The radius of rotation of the balls is 150 mm when the sleeve begins to rise and reaches to certain radius at maximum speed. The governor has radius that is 175 mm at mid position. The speed range of the governor is 38 rpm, and the increment in speeds is constant in the three positions. Find : (1) the friction of the load which existed at the sleeve, and (2) the governor radius at maximum speed. The friction is ignore in mid position only.
A min cage of mass 4t is to be raised with an acceleration of 1.5m/s2 by a cable passing over a hoist drum of 1.5m diameter. What is the power required when the load has reached a velocity of 6m/s, neglecting the inertia of the drum and weight of the cable, but allowing for bearing friction torque of 3kN at the drum? What is the power required at a uniform velocity of 6m/s
Q. The upper and lower arms of Porter governor are 0.25 m each and are pivoted 30 mm from the axis of rotation. The radius of rotation Is 130 mm. The mass of the ball and sleeve are 3 kg and 38 kg respectively. Find the effort and power of the governor.
In a porter governor the mass of the central load is 18 kgand the mass of each ball is 2kg. the top arms (250+X) mm while the bottom arms are (300+X) mm long. The friction of the sleeve is 20 N. If the top arms make 45 deg with the axis of rotation in the equilibrium position, find the range of the speed of the governor in that position Note X is the student roll no. for example if the student roll no is A20 then X=20
A Porter governor has equal arms each 250 mm long and pivoted on the axis of rotation. Each flyball has a mass of 10 kg and the mass of the central load on the sleeve is 50 kg. The radius of rotation of the flyball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Find the range of speed, when the friction at the sleeve is neglected. Select one: A. 35.4 rpm B. 25.4 rpm C. 15.4 rpm D. 45.4 rpm
In a porter governor the mass of the central load is 18 kgand the mass of each ball is 2kg. the top arms (254) mm while the bottom arms are (304) mm long. The friction of the sleeve is 20 N. If the top arms make 45 deg with the axis of rotation in the equilibrium position, find the range of the speed of the governor in that position
012/ A Porter governor has links 150 mm lang and are allached to pivots at a radial distance of 30 mm from the vertical axis of the govermor. The mass of cach ball is 1.75 kg and the mass of the sleeve is 25 kg. The governor sleeve ready to rise at 300 rpm when the links are at 30 to the vertical. Assuming the friction force to be constant, find the value of the Inction force minimum and maximum speed of rotation when the inclination of the links is 45' to the vertical Page 14 of 15
The arms of a Hartnell governor are of equal length. When the sleeve is in the mid- position, the masses rotate in a circle with a diameter of 150 mm (the arms are vertical in the mid-position). Neglecting friction, the equilibrium speed for this position is 360 rpm. Maximum variation of speed, taking friction into account, is to be 6% of the mid- position speed for a maximum sleeve movement of 30 mm. The sleeve mass is 5 kg and the friction at the sleeve is 35 N. Assuming that the power of the governor is sufficient to overcome the friction by 1% change of speed on each side of the mid-position, find (neglecting obliquity effect of arms), the (i) mass of each rotating ball (ii) spring stiffness (iii) initial compression of the spring