Calculating Torque for Crane Movement on Rails | Step-by-Step Guide

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SUMMARY

This discussion focuses on calculating the torque required for a crane to move on rails, specifically addressing the torque needed for each of the four wheels. The calculation is influenced by factors such as friction and air resistance, particularly given the crane's significant height of 10 meters. Participants emphasize the necessity of empirical data for accurate torque estimation, suggesting that practical experience with large cranes is crucial for making reasonable torque calculations.

PREREQUISITES
  • Understanding of torque calculations in mechanical systems
  • Familiarity with friction and resistance forces
  • Basic knowledge of crane mechanics and dynamics
  • Experience with electromotor and reducer selection
NEXT STEPS
  • Research methods for calculating torque in mechanical systems
  • Learn about friction coefficients for different materials
  • Explore the principles of crane dynamics and load distribution
  • Investigate electromotor specifications and selection criteria for cranes
USEFUL FOR

Engineers, mechanical designers, and project managers involved in crane design and operation, as well as anyone interested in the mechanics of heavy machinery movement on rails.

Bronka
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Hi,
I am trying to solve a problem.

I want to try to calculate the torque needed to make a crane move on rails.
I attached simple drawing of a crane. i want to calculate torque needed for each one of the four wheels so i could try choose proper electromotors and reducers.

I don't need exact calculations, i want some guidance at how it is calculated.

P.S. sorry for my English, not native language but trying hard.
P.P.S. dimensions in drawing are in mm.
 

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  • Crane.jpg
    Crane.jpg
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Hi Bronka. http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif

I don't think you can arrive at a reliable figure, due to lack of data. When traveling at a steady speed, the driving torque is entirely dependent on friction (and also wind/air resistance, in light of the significant size of the structure). But on top of this, to give the crane an acceleration from standstill, you will need extra short-term torque. It's 10 metres tall, is it?

A very practical person with experience of large cranes would be able to give a reasonable estimate, but this would be based on his experience, rather than data.

In short, not enough information! http://physicsforums.bernhardtmediall.netdna-cdn.com/images/icons/icon6.gif
 
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