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Worm gear calculation

  1. Apr 13, 2015 #1
    Dear all,
    I am trying to build single axis solar tracker using worm gear, I need guide line for calculation of worm gear & stepper motor .he are some relation i taken, But i wanted whether its correct & need to explain with example

    efficiency= (output Power of Worm gear/ Input Power of WormGear) = Po/Pinput

    Output power =P0=(2*pi*Outputspeed*outputtorque)/60

    Output power in Kw
    Output speed in rev/min
    output torque in Nm

    Input power = Pinput=(2*pi*Input speed*Input torque)/60

    Input power in Kw
    Input speed in rev/min
    Input torque in Nm

    Net Torque= Toutput+TInput+Tholding =0

    These are basic equation followed usually

    In order to drive 250Kw plant ; assume 15kw per row I have 16 rows with 1 column.

    Worm gear has to Drive 16 rows with coupling with single column item

    each panel weighs 20Kg ; 60 panel per row-> 60*20kg=1200Kg
    Each row structural weight around = 700Kg

    Net weight alone = 1900Kg per Row

    so load on worm gear might be 1900*16=30400

    worm gear relation part:

    if torque(high) gear ratio(high) speed o/p(LOW) vice versa

    There are lot of parameter in case of worm gear which are given below as example:
    1 st Stage Ratio of Worm Gear: 1/10
    2 nd Stage Ratio of Worm Gear:1/73
    Rated Output Speed: 0.078rpm
    Rated Output torque: 910 Nm
    output torque :1300Nm
    holding torque :10.4Knmt
    axila load : 133KN
    radial load :53KN
    o/p speed : 56.9rpm

    In case of motor i consider the motor as

    how can use these sample for calculation. can some help me out here.
  2. jcsd
  3. Apr 18, 2015 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
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