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  1. #1
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    Default Force acting on HTD pulleys?

    Does anyone know how to calculate the force in Newtons which pulls the pulleys together as an HTD belt is accelerated as I need this figure to allow me to work out how safe my current setup is?



    An esimation is 500N, but I would like to have a more accurate figure to work with



    Dunc

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    Default Re: Force acting on HTD pulleys?

    If you know the torque of your engine you can use



    Torque (Nm) = Force(N) x Distance (radius of your pulley in metres)



    so Torque/Distance = Force



    35Nm with a 50mm diameter pulley gives me about 1400N



    hope that helps



    Tony

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    Default Re: Force acting on HTD pulleys?

    Quote Originally Posted by tonybroad
    If you know the torque of your engine you can use



    Torque (Nm) = Force(N) x Distance (radius of your pulley in metres)



    so Torque/Distance = Force





    And if you don't know the torque but do know the power being transmitted, then



    Force(N) = Power(Watts) / Velocity(m/s)

    where

    Velocity(m/s) = Revs(rpm) x 60 x 2 x pi x radius(m)



    Note that the Force derived by either method is strictly the differential tension between the two sides of the belt. If the return side is close to slack then the Force is the RADIAL load on the bearings.



    The AXIAL load on the fan bearing is the thrust; on the other end the axial load will be low.



    Nick


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    Default Re: Force acting on HTD pulleys?

    Here are some numbers my computer could come up with:

    [img]index.php?t=getfile&id=177&private=0[/img][img]index.php?t=getfile&id=178&private=0[/img]

    [img]index.php?t=getfile&id=182&private=0[/img]

    Load Rating for Bearings



    Bearings - Basic dynamic load rating

    Technical Section

    Understanding Bearings for the Fan Industry
    Attached Images Attached Images

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