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PORT & QUAYSIDE


New Hoist System CPA first redesigned the hoist system to use a drum coupling that allows misalignment between the gearbox output shaft when the drum is loaded. This allows the output shaft of the gearbox to stay in alignment under all drum loads, which means the gear mesh will stay in alignment too. The replacement parts were fitted in the same space as the original components, and the strength and stiffness of the gearbox foundation were increased to meet operational requirements.


CPA also helped port representatives to source new powertrain components, including gearboxes, drum couplings, and the hoist drum. Zhang added: “While the components were under order, I took the client over to visit the shop that was producing the powertrain components. We hired a third-party inspection company to perform quality assurance and quality control inspections. After the components were delivered, Richard [Phillips] and I assisted the port with installation and commissioning.”


CPA’s eventual scope of work would include assisting the port in all new component fabrications; quality assurance (QA) and quality control (QC) audits; installation assistance; and acceptance. The entire project from design to acceptance tests for all three RMGs was completed within six months. The end customer was pleased with the performance of the new hoist systems and CPA’s expert services.


This type of machinery failure investigation and repair is not common for CPA; in fact, this kind of project amounts to only 10% of the company’s workload. As Phillips explained, these are the type of issues it prevents by performing a design review before the cranes are built.


q +1 253-627-7400 E casperph@cranedesign.com H casperphillips.com


Casper, Phillips & Associates


Original equipment: the drum is directly mounted to the gearbox output shaft.


October 2021 www.dockyard-mag.com 37


New equipment including


drum coupling being installed and aligned.


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