Excessive mechanical and pulsating vibrations developed in a main propulsion diesel engine may be more likely to cause damage to an attached __________.
• Torsional and vibratory stresses transmitted through the crankshaft to attached machinery • Differences between rotary (centrifugal/turbo) vs reciprocating pumps under pulsating loads • How high speed, tight clearances, and temperature affect sensitivity to vibration and misalignment
• Which attached device would be most sensitive to small shaft misalignments or imbalance caused by pulsating vibrations? • Think about which choice combines high rotational speed, close mechanical clearances, and thermal stresses, making it less tolerant of extra vibration. • Which component is specifically designed to handle pulsating gas loads, and which is designed more for smooth, continuous flow?
• Identify which option operates at very high RPM relative to the main engine and depends on smooth running. • Consider which component has the closest clearances between rotating and stationary parts, making vibration more dangerous. • Ask: which of these devices already expects pulsating gas flow by design, and which assumes relatively steady conditions?
No comments yet
Be the first to share your thoughts!