A shaft coupling is a device used to ___________.

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RRB ALP Instrument Mechanic 23 Jan 2019 Official Paper (Shift 1)
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  1. connect two shafts together 
  2. change direction of the shaft 
  3. change the direction of rotation
  4. connect three shafts together

Answer (Detailed Solution Below)

Option 1 : connect two shafts together 
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Detailed Solution

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Explanation:

A shaft coupling serves the crucial role of connecting two shafts, facilitating the transmission of power between them. This mechanical device is essential in various engineering applications, ensuring efficient and synchronized rotation. Here are key points explaining its significance:

Power Transmission:

Couplings enable the transfer of mechanical power from one shaft to another, connecting prime movers like motors to driven components such as pumps or generators.

Alignment Compensation:

  • They accommodate misalignments between shafts caused by manufacturing tolerances, thermal expansion, or other factors.
  • This feature prevents undue stress on machinery, minimizing wear and tear.

Vibration Damping:

  • Couplings can absorb and dampen vibrations, enhancing the overall stability of the system.
  • This is particularly important in applications where smooth operation is critical.

Torque Limitation:

Some couplings include torque-limiting features to protect components from damage in case of sudden overloads or torque spikes.

Ease of Maintenance: Couplings allow for the disconnection of components without disassembling the entire system, simplifying maintenance tasks and reducing downtime.

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