In this project, we developed a boat winch that can support boats up to 4,84 tf.
All the caculations made to choose the hoist, the pulley and the steel wire were based on CIMAF technical manual and ASME normative text.
The gears and shafts of the gearbox were dimensioned following the ASME normative text. The bearings were selected taking into account their resistance and fatigue limits.
The project utilizes a mobile pulley, so the load the motor pulls could be divided by two, facilitating the calculations and decreasing the investment values in the system.
The base fixation bolts were also calculated using ASME criteria for resistance.
After the manual calculation and selection of diameters and bearings, we utilized the ANSYS software to validate the project. The results of deformation, stress and strain were above the expected.
Data:
Wire diameter: Ø13 mm
Hoist diameter: 320 mm
Hoist length: 1120 mm
Boat liftting speed: 0,15 m/s
Motor power: 15 hp
Motor speed: 1775 rpm
Gearbox trasmission ratio: 101,2
