Question

Preliminary Design of a Winch Lift
Problem
Determine the force-time function in the lifting cable, the necessary drum diameter, and the torque-time function acting on the shaft of the winch drum during any 1 cycle. Define the gear ratio and the power and torque requirements for the motor.

Given
A hay bale’s weight varies depending on its moisture content but can be assumed to average about 60 lb. The hay truck holds 100 bales and the farmer would like to unload it in 30 min. The lift height is 24 ft.

Assumptions
Nylon rope of 3/4 in dia has a minimum break strength of about 8 000 lb and a spring constant of about 50 000 lb/in per ft of length in axial tension.

Answer 1

Answer:

Hi

Explanation:

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