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Turbine Main shaft Gear box Generator Driveshaft Coupling Figure 1. A high speed turbine rotates at 100Hz and drives, by means of helical gears, a 250kW generator at 12Hz (see figure 1). The main shaft (AB) and the driveshaft (CD) are made of steel having the allowable shear strength of 120MPa and Shear Modulus of 80GPa. The driveshaft distance L 0.6m. Determine the diameters of the main and drive shafts respectively, ensuring the requirement that the angle of twist of the driveshaft is not more than 3degrees. Assumptions No friction losses, no bending in shafts and no shcok loading occurs

engineering   Mechanical-Engineering   
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60 398.081 - 1 T 39508 N てMC-120Mpa! af

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