Parallel katsysteem voor een containerkraan.
Report 97.3.TT.4956, Transport Engineering and Logistics.
In examining possibilities to enlarge the capacity of a container gantry
crane, reducing the weight of the trolley has great influence on the cranes
cycle time. In this report therefore a trolley will be designed which weighs
about 60% less than a conventional construction.
After the introduction the second chapter will declare the used loading
principles and the classification of the crane in a crane group. This
classification is a result of a design load of 75 tons and a number of
load changes during the cranes life that it to be expected.
In the next chapter the possibilities in reducing the weight of the trolley on
a conventional way are considered. In chapter 4 the choice for the final idea
is made, explaining the advantages and disadvantages. The idea that is to be
worked out is spliting the trolley in two identical parts driving parallel
through the rails. Most important advantage of this construction is that a main
frame, like in a conventional trolley, is not needed.
In chapter 5 the stress in the different parts of the cat is calculated,
assuming maximum load. These values will be compared with the highest
acceptable stress in the used materials under the circumstances.
Finally in chapter 6 the conclusion is presented. The weight of the designed
trolley can be limited to 10 tons (without the drive); that matches the
objective amply. A conventional trolley designed for the same load will weigh
as much as about 30 tons. Besides the idea of spliting the trolley, some
other uncoventional ideas contribute to the weight reduction: the moulded
polyamid wheels and the parallel and vertical hanged cables.
Reports on Transport Engineering and Logistics (in Dutch)
, TU Delft