A crane hoist is required to raise 300 kg weight at a speed of 0.40 m/s. The
Fantastic news! We've Found the answer you've been seeking!
Question:
- A crane hoist is required to raise 300 kg weight at a speed of 0.40 m/s.
- The hook is mounted on a block that carries a single pulley sheave.
One end of the hoisting cable is anchored on the crane trolley and the other is wound up on a winch drum 0.30 m in diameter.
The drum is driven by a speed-reducing gear of a 45:1 ratio. The whole mechanism may be considered to be 65% efficient.
Determine the power and speed rating of the motor and the braking torque exerted by the motor when it lowers the load at a rate of 0.5 m /s.
Related Book For
Physics
ISBN: 978-0077339685
2nd edition
Authors: Alan Giambattista, Betty Richardson, Robert Richardson
Posted Date: