Dynamics of Machinery
102602Module 5: Effects of Inertia of Reciprocating Masses on Engine Frame
1(g). Partial balancing is particularly important in: (i) Steam turbines (ii) Locomotives (iii) Electric motors (iv) Centrifugal pumps.20262m
Module 5: Effects of Inertia of Reciprocating Masses on Engine Frame
View this question on its own page →Partial balancing is particularly important in: (i) Steam turbines (ii) Locomotives (iii) Electric motors (iv) Centrifugal pumps.
1(h). The purpose of balancing reciprocating masses is to: (i) Increase engine temperature (ii) Reduce unbalanced forces and couples (iii) Increase friction (iv) Reduce fuel supply.20262m
Module 5: Effects of Inertia of Reciprocating Masses on Engine Frame
View this question on its own page →The purpose of balancing reciprocating masses is to: (i) Increase engine temperature (ii) Reduce unbalanced forces and couples (iii) Increase friction (iv) Reduce fuel supply.
6(a). For a two-cylinder locomotive with cranks at 90°: reciprocating mass per cylinder = 300 kg; crank radius = 0.3 m; driving wheel diameter = 1.8 m; distance between cylinder centre lines = 0.65 m; distance between driving wheel central planes = 1.55 m. Determine (i) the fraction of reciprocating masses to be balanced if hammer blow is not to exceed 46 kN at 96.5 km/h, (ii) variation in tractive effort, and (iii) maximum swaying couple.20267m
Module 5: Effects of Inertia of Reciprocating Masses on Engine Frame
View this question on its own page →For a two-cylinder locomotive with cranks at 90°: reciprocating mass per cylinder = 300 kg; crank radius = 0.3 m; driving wheel diameter = 1.8 m; distance between cylinder centre lines = 0.65 m; distance between driving wheel central planes = 1.55 m. Determine (i) the fraction of reciprocating masses to be balanced if hammer blow is not to exceed 46 kN at 96.5 km/h, (ii) variation in tractive effort, and (iii) maximum swaying couple.
6(b). Explain partial balancing of locomotives and derive the expression for hammer blow.20267m
Module 5: Effects of Inertia of Reciprocating Masses on Engine Frame
View this question on its own page →Explain partial balancing of locomotives and derive the expression for hammer blow.
8(b). Explain the balancing of primary and secondary forces in reciprocating engines. Derive the conditions for complete balancing of primary and secondary forces.20267m
Module 5: Effects of Inertia of Reciprocating Masses on Engine Frame
View this question on its own page →Explain the balancing of primary and secondary forces in reciprocating engines. Derive the conditions for complete balancing of primary and secondary forces.
9(b). Write a short note on reciprocating masses balancing by revolving mass.20267m
Module 5: Effects of Inertia of Reciprocating Masses on Engine Frame
View this question on its own page →Write a short note on reciprocating masses balancing by revolving mass.