8/3/2023 0 Comments Find workdone in ic engine![]() ![]() ![]() Step-2: Mass moment of inertia (I) calculation Step-1: Coefficient of fluctuation (C s ) calculation Since it is a small machine, diameter of the flywheel should be as small as possible.Ĭonsider 500mm to be the max size of the flywheel dia.Ĭalculate the mass moment of inertia required for the flywheel of the punching press machine. of fluctuation of speed, C s = 0.02 (Value to be considered by the designer) Rated capacity of the punching machine is 22KN.Ĭonsider coeff. Let us consider a punching machine driven by 3KW, 1000RPM powered motor with a gear set of 5:1 and a stroke length of 250mm. We will try out a simplified problem on flywheel sizing and calculate the required moment of inertia. Ke = 0.5 I (Ѡ max + Ѡ min ) (Ѡ max – Ѡ min )…………eq.4Įq.5 is used to obtain necessary flywheel inertia corresponding to variations in speed. The general equation of kinetic energy for a flywheel system is given as, Input required: kinetic energy of the system Step-2: Mass moment of inertia calculation Note: The smaller the C s value, larger the flywheel, but smoother the operation. Therefore, Coefficient of Fluctuation of speed, Ѡ mean =Mean speed = (Ѡ max + Ѡ min ) /2…….eq.1 The ratio between maximum fluctuations of speed to mean speed is called coefficient of fluctuation of speed ( C s ).Ĭonsider, Ѡ max =Max. The difference between maximum & minimum speeds during a cycle is called maximum fluctuation of speed. Step-1: Coefficient of fluctuation calculationįlywheel inertia/size depends upon the fluctuations in speed. Secondly, calculate the geometry/dimensions of the flywheel based on the calculated mass moment of inertia and material properties. Arm type – Suited for larger sized engines/machinesįundamental Principles of Flywheel Design and Sizing Calculationsįirstly, calculate the mass moment of inertia required by the flywheel to smoothing out the fluctuation/variations of kinetic energy in the system.Disc type – Suited for smaller sized engines/machines. ![]() Flywheel Designīased on the mode of operation, two kinds of flywheel designs are there: When the flywheel absorbs energy, its speed goes on increasing and when it releases the acquired energy, it decreases. In case of I.C engines, energy is developed during power stroke and the engine is to run the whole cycle from the power generated from this stroke. its primary function is to sort out variations in the speed of a shaft which are caused due to torque fluctuations. A flywheel used in machines acts as a reservoir to store energy when the supply of energy is excess and the same is released when the requirement arises i.e. ![]()
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