How do I Calculate the Force Transmitted by a Clutch?

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Discussion Overview

The discussion revolves around calculating the force transmitted by a clutch in the context of a design scenario involving an engine with specific power and RPM values. The focus includes the relationship between power, torque, and the considerations necessary for clutch performance under varying conditions.

Discussion Character

  • Technical explanation, Conceptual clarification

Main Points Raised

  • One participant seeks to calculate the force transmitted by a clutch given an engine power of 30 hp and an RPM of 3000.
  • Another participant suggests that the calculation may actually involve torque, referencing the formula that relates power to torque and angular velocity.
  • A later reply provides a specific calculation for torque, indicating it to be 52.5 ft.lbs based on the given power and RPM, while also noting that this may not represent the peak torque of the engine.
  • Concerns are raised regarding the need for reserve capacity in the clutch to prevent slippage under high loads.

Areas of Agreement / Disagreement

Participants express differing views on the calculation focus, with one emphasizing torque instead of force. The discussion includes acknowledgment of the complexities involved, such as peak torque and slippage considerations, indicating that there is no clear consensus on the best approach to the problem.

Contextual Notes

Participants highlight the potential for non-constant torque produced by the engine and the need for additional capacity in the clutch design, suggesting that assumptions about torque behavior and clutch performance may not be fully resolved.

sherazi21st
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hi, I'm designing a clutch and need to calculate the force transmitted by the clutch. engine power is 30hp and rpm is 3000. How to calculate.
 
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You mean torque?

power = torque * angular velocity.

There may be peaks above that because of the non-constant torque produced by an engine.
 
OK thanks bro.
 
30 hp x (5252/3000 rpm) = 52.5 ft.lbs of torque.

As mentioned, that may not be the torque peak of the engine, and the clutch also needs reserve capacity in order to resist slippage when applying the clutch at high loads.
 

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