When friction acts at the sleeve the maximum angular velocity increases?

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A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Considering friction at the sleeve of 10N, find the power of the governor in N-m

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Neglecting friction at the sleeve, find the governor effort.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Neglecting friction at the sleeve, find the sleeve lift.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Considering friction at the sleeve of 10N, find the governor effort.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Considering friction at the sleeve of 10N, find the range of speed in rpm.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Neglecting friction at the sleeve, find the power of the governor in N-m.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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For a porter governor, Each arm has a length of 250mm and pivoted on the axis of rotation. Sleeves carry a mass of 25kg and each ball’s mass is 5Kg. Radius of rotation: 150mm at the beginning of lift and 200mm at the maximum speed of governor. Find range in speed neglecting friction in rpm.

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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Consider two governors A and B running at the same speed. When this speed increases or decreases by a certain amount, the lift of the sleeve of governor A is greater than the lift of the sleeve of governor B. Which of the following statement is true for the above situation?

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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Because of friction acting at the joints, while speeding up it prevents the downward movement of sleeve.

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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When the speed of the governor increases, which of the following effect does friction causes?

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Pickering governor is driving a gramophone. Each disc attached to the centre of a leaf spring has a mass of 20 g. The width of each spring is 5 mm and thickness of 0.125 mm. The effective length of each spring is 40 mm. The distance from the spindle axis to the centre of gravity of the mass when the governor is at rest, is 10 mm. Find the speed of the governor in rpm when the sleeve has risen to a height of 0.8 mm. (E = 210kN/mm^2)

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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For a given lift of the sleeve, the sensitiveness of the governor increases as the speed range decreases

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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With increase in friction, coefficient of insensitiveness increases.

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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If the mass of the ball is 7.5 kg and the controlling force is 200N with an angular velocity of 100 rpm, find the radius.

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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If the mass of the ball is 25 kg and the controlling force is 450 N with an angular velocity of 150 rpm, find the radius.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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When there is no force on the sleeve, then the governor must be running steadily.

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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When the sleeve of a Porter governor moves upwards, the governor speed

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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When the sleeve of a Porter governor moves downwards, the governor speed

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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When the sleeve of a porter governor moves upwards, the governor speed

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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The effort of a governor is the _________ force exerted at the sleeve for a given percentage change of speed.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A power screw is rotated at constant angular speed of 1.5 revolutions/sec by applying a steady torque of 1.5Nm. How much work is done per revolution? What is the power required?

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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In a spring controlled governor, when the controlling force _____________ as the radius of rotation increases, it is said to be a stable governor.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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When the radius of rotation of balls ______________ as the equilibrium speed increases, the governor is said to be unstable.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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When the speed of the governor decreases, which of the following effect does friction causes?

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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A governor is said to be isochronous when range of speed is zero for all radii of rotation of the balls within the working range, neglecting friction.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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