UWE Bristol Engineering showcase 2015
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Vinicius da Silva Duarte<br />
Beng Mechanical <strong>Engineering</strong><br />
Project Supervisor<br />
Dr. Tushar Dhavale<br />
<strong>Engineering</strong> Project of a storage rack for Military Aircraft Tyres<br />
Background<br />
Despite the exponential global aviation growth,<br />
most of the tires are not stored following the<br />
manufacturer recommendations what causes an<br />
increase in the maintenance and decrease of the<br />
tires life.<br />
This project investigates the improvements that<br />
can be made in the current way the tires are<br />
stored by designing a whole new rack that address<br />
some of the problems the tires can face while<br />
stored.<br />
Improvements were made like introducing a<br />
rotating system, therefore the tires will not suffer<br />
distortions caused by the tire weight on long term<br />
storages and blocking most of the ultraviolet light<br />
that could hit the tire by adding metal sheet on<br />
the rack sides. As important as protect the tires<br />
from the environment is to track when they<br />
arrived, when they were removed and their status,<br />
therefore a traceability system was implemented.<br />
Design<br />
One of the main concerns was about the tire<br />
storage is the deformation that can occur when<br />
they are stored for a long time. To solve that<br />
question a pulley system was designed , the<br />
responsible for the maintenance can turn the<br />
crank and all the tires will rotate or he can take off<br />
the screw that transmit the crank movement and<br />
fit a drill or electric screwdriver into a hexagonal<br />
hole to rotate the tires.<br />
For this project other small parts had to be chosen<br />
and several calculations were made in order to<br />
choose the most appropriate products, for example<br />
the bearings that will make sure the roller run<br />
smoothly. They were decided after calculations of the<br />
reliability it would offer, the load factor it would carry<br />
and the rating life they would have. The chosen<br />
bearing dimensions can be seen below.<br />
Simulation<br />
Various designs were tested in order to ensure that<br />
the rack would be able to carry the weight of another<br />
2 racks full of the heaviest tires on top of it. The<br />
following image is the final design distortion<br />
simulation and the result was a 0.382 mm distortion,<br />
almost 10 times better than the first design<br />
simulation that resulted in a 3.6 mm distortion.<br />
Traceability<br />
To help the documentation and tracking of the<br />
tires a computer program was created, it would be<br />
utilized by employees who are responsible for the<br />
maintenance and storage of the tires, helping to<br />
keep the storage organized. The program would<br />
receive information about the condition and<br />
location of the tires every time they are removed<br />
our stored in one of the racks and this way<br />
creating a tire database and history like shown<br />
below.<br />
Final Design<br />
After several simulations and calculations was<br />
possible to come with a final product that can be<br />
seen in the following image.<br />
Project summary<br />
The project consist in a design of a new storage rack<br />
for tires that would allow them to be easily rotated<br />
to avoid distortions that can be caused in long term<br />
storages due to the high weight of a tire and wheel<br />
assembly. It also include a tracking system for the tires<br />
using a portable computer to create a database for the<br />
tires, that would help the management and care of several<br />
tires in a storage.<br />
Project Objectives<br />
• Project a storage rack that allow tires to be<br />
rotated easily<br />
• Implement a tracking system to the rack<br />
• Address most of the requirements present in the<br />
manufacturers maintenance and care manual<br />
Project Conclusion<br />
A very innovative traceability system was<br />
implemented and the designed rack protect the tires<br />
from most of the degrading chemicals and agents<br />
that can be present in a storage.<br />
The rack can hold four tires and can have two other<br />
racks on top of it what make it very space efficient.<br />
The problem about the tire distortion was solved by<br />
implementing a manual and semi-automatic method<br />
for rotating all the tires.<br />
The ultraviolet light degradation and contact with<br />
degrading chemicals as hydraulic fluids, fuels and<br />
other solvents was addressed by adding metal sheets<br />
around the sides of the rack.<br />
The final product offer a lot of innovations and<br />
protect the tires more than other similar projects, if<br />
released in the market it would be a competitive<br />
product
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