Open AccessStudy of Counterweight Addition to Improve Structural Stability of Ship Unloader at Pulang Pisau CFPP
Author(s) -
K Huda,
A Safii,
A Priyono
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1096/1/012123
Subject(s) - counterweight , boom , bearing (navigation) , structural engineering , moment (physics) , engineering , lift (data mining) , marine engineering , geology , computer science , physics , classical mechanics , artificial intelligence , environmental engineering , data mining
The ship unloader at Pulang Pisau CFPP is a crane type machine that is used to transport coal from barges to stockpile. This machine uses slewing bearing as component that support for slewing movement to transport coal from the barge to the belt conveyor. Meanwhile this machine also has boom that moves up and down to lift the coal towards to the hopper provided. Several times the slewing bearing was damage with the failure mode is lifted up the inner race bearing and causing the roller inside damaged. Investigation and testing are carried out to find out the strength of the structure and what are the forces that acted. From the results of the investigation and testing, it was found that the ship unloader suffered excessive moment in the front side (boom side), thus making the bearing was fruquently damaged. And the limitation about lifting angle of boom is considered. This study tries to find the balance of forces, moments, and lifting angle, and then to add a counterweight that are sufficient to reduce the impact of the unbalance moment with limitation of boom lifting angle. With the addition of counterweight and limitation angle of boom make the moments are more stable to the structure, and so the lifetime of slewing bearing is longer.