The main function of a flywheel is to cause variations in the speed of a shaft caused by torque fluctuations.

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The moment of inertia of a flywheel is 6500 kg-m^2, from the turning moment diagram, it is found that fluctuation of energy is 56000 N-m, if mean speed is 120 rpm, then find maximum speed.

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

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The moment of inertia of a flywheel is 6500 kg-m^2, from the turning moment diagram, it is found that fluctuation of energy is 56000 N-m, if mean speed is 120 rpm, find the minimum speed.

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When the flywheel absorbs energy, its speed ________

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In order to reduce the heavy weight of the flywheel which of the following mechanical component is used?

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If the mean speed is 3/4^th of the maximum speed, the coefficient of steadiness is ______

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Coefficient of steadiness is reciprocal of coefficient of fluctuation of speed.

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If the minimum speed of the engine is half the maximum speed, then coefficient of fluctuation is _____

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A shaft fitted with a flywheel rotates at 250 r.p.m. and drives a machine, the torque fluctuated about 18750 N-m, find the power required to drive the machine.

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

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A flywheel is used to control the mean speed of an engine caused by the variations in load.

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Coefficient of fluctuation is the ratio of ______

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In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called

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A flywheel is fitted to the crankshaft of an engine having W as the amount of indicated work per revolution and permissible limits of coefficient of fluctuation of energy and speed as CE and CS respectively. The kinetic energy of the flywheel is given by

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

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The flywheel of a steam engine has a mass moment of inertia of 2500 Kg-m^2. The starting torque of the steam engine is 1500 N-m and may be assumed constant, using this data find the angular acceleration of the flywheel in rad/s^2.

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In a punching press, the requirement is to punch 40 mm diameter holes in a plate having a thickness of 15 mm. The rate at which the holes should be punched is 30 holes/min. Energy requirement is of 6 N-m per mm2 of sheared area. If the punching takes time 1/10 of a second and the speed of the flywheel varies from 160 to 140 rpm, determine the mass of the flywheel having radius of gyration of 1 m.

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For a certain engine having an average speed of 1200 rpm, a flywheel approximated as a solid disc, is required for keeping the fluctuation of speed within 2% about the average speed. The fluctuation of kinetic energy per cycle is found to be 2 kJ. What is the least possible mass of the flywheel if its diameter is not to exceed 1 m ?

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

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The flywheel of a machine having weight of 4500 N and radius of gyration of 2 m has cyclic fluctuation of speed from 125 r.p.m to 120 r.p.m. Assuming g = 10m/s^2, the maximum fluctuation of energy is

asked Sep 21, 2022 in Machine Dynamics by Grayson (34.3k points)

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The speed of an engine varies from 210 rad/s to 190 rad/s. During the cycle the change in kinetic energy is found to be 400 Nm. The inertia of the flywheel in kg/m2 is

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If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be

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When engine torque is more than mean resisting torque, then the flywheel _______

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When engine torque is less than mean resisting torque, then the flywheel _______

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For a multicylinder engine, the moment of inertia of a flywheel is 6500 kg-m^2, from the turning moment diagram, it is found that fluctuation of energy is 56000 N-m, if mean speed is 120 rpm, then find maximum speed.

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

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To calculate power generated, product of maximum torque and angular speed is taken.

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The virtue or equivalent eccentric for the Meyer’s expansion valve is defined as an eccentric having such a length and angle of advance that will cause cut-off to take place at the same position, as is caused by the combined effect of main eccentric and expansion eccentric.

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If E = Mean kinetic energy of the flywheel, CS = Coefficient of fluctuation of speed and Δ E = Maximum fluctuation of energy, then

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The tensile stress in the flywheel rim due to the centrifugal force acting on the rim is given by

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