Question: A horizontal steam engine running at (250 mathrm{rpm}) has a bore of (210 mathrm{~mm}) and a stroke of (350 mathrm{~mm}). The piston rod is (20

A horizontal steam engine running at \(250 \mathrm{rpm}\) has a bore of \(210 \mathrm{~mm}\) and a stroke of \(350 \mathrm{~mm}\). The piston rod is \(20 \mathrm{~mm}\) in diameter and connecting rod length is \(1050 \mathrm{~mm}\). The mass of the reciprocating parts is \(6 \mathrm{~kg}\) and frictional resistance is equivalent to a force of \(500 \mathrm{~N}\). Determine the following when the crank is at \(120^{\circ}\) form IDC, the mean pressure is \(5 \mathrm{kN} / \mathrm{m}^{2}\) on the cover side and \(0.1 \mathrm{kN} / \mathrm{m}^{2}\) on the crank side:

(a) Thrust in the connecting rod,

(b) thrust on the cylinder walls,

(c) load on the bearings, and

(d) turning moment on the crankshaft.

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Given data Engine speed N 250 rpm Bore diameter D 210 mm 021 m Stroke length L 350 mm 035 m Piston r... View full answer

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