Recent content by Stephen123

  1. S

    Calculating Pulley and Shaft Loads for an Existing System

    I understand what you mean now Baluncore, that makes sense. Thank you for the help!
  2. S

    Calculating Pulley and Shaft Loads for an Existing System

    When you say the locking device torque will be the same as the pulley torque, what do you mean by pulley torque? The locking device locks the shaft to the pulley and is rated for 12,000Nm of torque. How can i actually find what the torque at the locking device is? Thanks
  3. S

    Calculating Pulley and Shaft Loads for an Existing System

    Hi, i need to do a pulley/shaft check on an existing system. Pulley is 840mm diameter and the motor has 47kw and 390 nm breakdown torque so to find the force from the belt can i assume that the force at the pulley o.d. distance is the force? So 390*0.84 will give the torque at that distance...
  4. S

    Torque required to move a wheeled weight

    The 400t load includes both the load and the vehicle. It is the total mass of both components and also allowing a little extra. The Concrete below the vehicle has been checked by the client already as they use it for similar applications. As i said this is preliminary work. If the job goes...
  5. S

    Torque required to move a wheeled weight

    Sorry misread acceleration for velocity. The acceleration is what i was trying to find with (Vf^2 - Vi^2)/2*D. Hydraulic motors are also an option I have thought about but whichever option I would still need to find the torque required initiate the movement so i figured that wasn't all too...
  6. S

    Torque required to move a wheeled weight

    The desired / allowable acceleration is 2.5m/s. Travel time will be long since it is a 101m overall distance but it terms of time I was going to estimate a number for maybe 7 seconds for it to reach max acceleration and then travel at a constant speed, seem reasonable? Wheelbase, track width...
  7. S

    Is the relationship between power, torque and RPM a linear relationship?

    Sorry typo, the 600mm gear is on the 110mm shaft. My thought is that if the gear was essentially a wheel, would the torque applied by the 600 diameter be a ratio of 600mm/110mm? Therefore the torque at the 110mm shaft multiplied by the size ratio would give the torque at the outside of the 600mm?
  8. S

    Torque required to move a wheeled weight

    I have a problem where I have a large mass on wheels that I want to power with an electric motor. My hope is that I can find the torque i need to start and drive the motor and this is what I have so far. Mass = 400t. Initial velocity = 0 Final velocity = 2.5m/s Distance required to travel =...
  9. S

    Is the relationship between power, torque and RPM a linear relationship?

    Hi I have a problem dealing with rpm power and torque. I have a motor powering a gearbox which has a 20:1 ratio. The power and rpm are not an issue so i have not looked at those figures but the motor produces 240Nm of torque. Since it is a 20:1 gearbox, i have assumed the torque is 20 times...
Back
Top