reciprocating and revolving masses are balanced at the crank pin.Then why is it that webs are made heavy and why are they necessarily of that shape?
2006-09-06 15:48:01 · 3 answers · asked by dhruv 1 in Science & Mathematics ➔ Engineering
It is due the kind of loads and stresses.
As the crank transfers forces and moments, it has to be
rigid. Any deflection or twist will make it unfunctional.
To minimize deflection, and at the same time to reduce the weight
it has an IBEAM like section.
By having thick and narrow flange and thin web, you increase the the moment of inertia of the section, and lower stresses and deflection.
2006-09-08 17:06:01 · answer #1 · answered by cookiedada 3 · 1⤊ 0⤋
as the engine consist of one cylinder in 4 stoke engine in which working stroke is after every 3 stroke so for having power to rotate the engine in next rotation the crank web is use so to store the energy crankweb is made heavy
2006-09-09 10:58:36 · answer #2 · answered by amit atrangi 1 · 0⤊ 0⤋
I am going to go with they are heavy for the strength. Even then they still break every once in awhile.
2006-09-07 00:24:14 · answer #3 · answered by rscanner 6 · 0⤊ 0⤋