Designing a flywheel in solidworks with moment of inertia
![designing a flywheel in solidworks with moment of inertia designing a flywheel in solidworks with moment of inertia](https://d2t1xqejof9utc.cloudfront.net/screenshots/pics/248487b419ca32a2a95e5b50c7f52e4d/large.jpg)
DESIGNING A FLYWHEEL IN SOLIDWORKS WITH MOMENT OF INERTIA HOW TO
This flywheel design and sizing calculation shows how to find out mass, size, cross section, maximum internal tangential stress and factor of safety for a flywheel. The ω yield gives the critical speed of the flywheel. Max speed at yield stress, ω yield = 362.10 rad/sec The basis of this analysis is that inertia forces and moments act through or about the centre of gravity of the moving machine element. We use of inertia forces and moments to take account of forces in the crank mechanism associated with acceleration of masses. stress in the flywheel, Ϭ t-max = 12533445.38 N/m 2 = 12.53 MPa Inertia forces and torques in a slider and crank mechanism. Thickness of flywheel, t=13.62 mm Step-4: Stresses & FOSĪlong with flywheel angular velocity from Part-1, as ω=1000 rpm = 2*π*1000/60= 104.67 rad/sec Outer radius of the flywheel, R2 = 400 mm (given) Mass of flywheel, m= 29.68 kg Step-3: Size & shape We will select cast steel for our application, so
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Let’s take the same example discussed in Part-1 and find out the mass, size, shape and design parameters as per the equations discussed above. Ω yield = Possible angular velocity when maximum internal stress equals to yield stress of the material Example V = Poisson ratio of the flywheel material Ϭ t-max = Max internal stress in the flywheel ĭ = Density of flywheel material Maximum stress (tangential) of a flywheel is given by: M = π * (R2 2 – R1 2 ) * t * d …………………….eq.2.3ĭ = Density (will be obtained from Step-1)įrom the eq.2.2, 2.3 the cross section, size and thickness of the flywheel can be calculated. We already know how to get the mass moment of inertia of a flywheel (I) required for a specific application.Īnother equation for calculating the mass moment of inertial (I) is:įrom eq.2.1 mass of the flywheel can be calculated, how? Will discuss with the example later. The Density of the materials ( d) is as follows.Ĭast steel – 7800 kg/m 3 Step-2: Calculation of the flywheel mass The material of flywheel on most applications will be either cast iron or cast steel. R2 = Flywheel outer radius Step-1: Material selection Its size, shape and material density / mass and maximum stresses are also to be taken into account while designing a flywheel. In first part of the flywheel design calculation tutorial example, we saw about calculating required mass moment of inertia for a particular application.įlywheel design doesn’t stop with that.