Are Compound Shafts the Key to Efficient Power Transmission?

  • Thread starter chandran
  • Start date
In summary, compound shafts (shafts at varying diameter and varying sections) are used in power transmission for several reasons. They allow for easy assembly, accommodate additional components such as pulleys and gears, and help reduce localized stresses and avoid vibrational modes. The moment generated in power transmission, such as tension in wires and wind on poles, can be controlled by adjusting the section and taper of the shafts. Additionally, breaking poles into smaller pieces makes shipping easier.
  • #1
chandran
139
1
in power transmission why compound shafts(shafts at varying diameter and varying sections) are used?
 
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  • #2
In a nutshell:

- Ability to assemble
- Need for additional components such as pulleys, gears etc...
- Reduced/increased localized stresses
- Vibrational modes avoidance
 
  • #3
The moment increases the closer you get to the base of the tower, therefore more section is required to resist this moment. The moment is generated from tension in the wires, wind on the wires, wind on the pole etc. If no guy wires are used, then the tower is modeled as a cantilevered beam. The deflection of the tower can also be controlled by decreasing/increasing the section and taper of the shafts.

The shafts stack on top of one another, like a telescope. Breaking the entire poles into pieces also makes shipping a lot less dramatic.
 
  • #4
I completely missed that definition of "power transmission." I guess the OP should clarify what context they were referring.
 

1. Why are compound shafts used in engineering?

Compound shafts are used in engineering to transmit power between two rotating shafts that are not aligned. They are also used to increase the strength and stiffness of a shaft, allowing it to handle higher torque loads.

2. What materials are commonly used to make compound shafts?

The most commonly used materials for compound shafts are steel, aluminum, and composite materials. Steel is preferred for its high strength and durability, while aluminum is lightweight and used for applications that require lower torque. Composite materials, such as carbon fiber, offer a combination of strength and light weight.

3. Can compound shafts be used in high-speed applications?

Yes, compound shafts can be used in high-speed applications. They are designed to handle high rotational speeds and can be balanced to minimize vibration and reduce wear on bearings.

4. How are compound shafts manufactured?

Compound shafts are typically manufactured by machining or forging. Machining involves cutting and shaping the shaft from a single piece of material, while forging involves shaping the shaft by heating and hammering it into the desired form. Both methods require precision and expertise to ensure the shaft is strong and balanced.

5. What are the advantages of using compound shafts?

There are several advantages of using compound shafts. They allow for the transmission of power between non-aligned shafts, increase the strength and stiffness of a shaft, and can be designed to handle high speeds. Additionally, compound shafts can be made from a variety of materials, allowing for flexibility in design and application.

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