Question

During forward stroke of the piston of the double acting steam engine, the turning moment has the maximum value of 2000 N-m when the crank makes an angle of 80° with moment is 1500 N-m when the crank makes an angle of 80° with the outer dead center. The turning moment diagram for the engine may be assumed for simplicity to be represented by two triangles. If the crank makes 100 r.p.m. and the radius of gyration of the flywheel is 1.75 m, find the coefficient of fluctuation of energy and the mass of the flywheel to keep the speed within ± 0.75% of the mean speed. Also determine the crank angle at which the speed has its minimum and maximum values the inner dead center. During the backward stroke, the maximum turning 2000 06.

Answer 1

Given Dah 60 ее 200 R1So mea 3

CDoY Man A CD CD AE AB AG 2000 8 2-000

16m Μαχ.-Hu 2- .Tmk

S-03 Tha minimum Pces CE AE AS-EB AB AB 2006- 2000 Yao! る6

EP AB A-B ワ2000-875 2DDO 3 2 13