Diseño y simulación de un sistema de limpieza y pintura de transformadores.
The current essay discusses the design and simulation of a crane bridge and a paint oven. It is based on several sciences such as fluid mechanics, mechanical design, thermodynamics, and heat transfer. It was very important to use appropriate texts to guide the analysis of this design, and supple...
| Autor Principal: | González Leiva, Luis Eduardo |
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| Otros Autores: | Guerrero García, Diego Rafael |
| Formato: | bachelorThesis |
| Idioma: | spa |
| Publicado: |
2012
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| Materias: | |
| Acceso en línea: |
http://dspace.ups.edu.ec/handle/123456789/4450 |
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The current essay discusses the design and simulation of a crane bridge and a paint oven.
It is based on several sciences such as fluid mechanics, mechanical design,
thermodynamics, and heat transfer.
It was very important to use appropriate texts to guide the analysis of this design, and
supplement information to get results close to the intended.
The objective of this thesis is to compare the results obtained with the calculus in the
analytical part, and the results obtained with mechanical design software. By using this
kind of software is convenient to reduce the time of construction of a process or the
build time for a new item or product.
Crane Bridge
This design begins with the sizing of the crane bridge; it depends of the space considered
by “RVR Transformadores” to move the transformers trough four pools which contain
acids for cleaning the steel. After that, it is necessary to know the total weight that bears
the main beam (in this case the total weight is 4.68 klb).
Once considered this measure, a beam must be selected and the “American Institute for
Steel Construction Manual” is essential for choosing the accurate element; with the
correct calculus of moments acting on the beam.
Following the logical procedure, the crane rails will be selected and finally the columns.
It is necessary to stress that each element involves a separated calculation.
The plates and anchors are another important part, inasmuch as they are the elements
that bind the structure. The forces acting on the structure are requested to complete this
calculation; forces caused by earthquakes or the movement of transformers are important
for calculating the suitable bolts and welding.
Using software such INVENTOR or SAP is possible to obtain preliminary results of
behavior of the structure and visualizations of the loads acting over the system. Also
shows the charge ratio for each element selected. So it is possible to know if the
calculation was correct.
Paint Oven
The second part within this process is the painting. Inside a chamber that contains 65.5
cubic meters of air will be allocated the transformer and a person who has the enough
space to move around and complete this task.
When an operator is in painting procedure, the maximum temperature will be around 21
degrees Celsius; after that the air should reach 60 degrees.
Initially the paint oven is designed to renovate constantly the air inside itself. It is
necessary to use the knowledge of fluid mechanics, due to the parameters such as
velocity and pressure. Ducts need to be calculated to give the system those
characteristics, and the fans, both the drive and the extraction, are selected according to
the tables created with values of caudal and pressure.
Once obtained the flow properties, system requires the calculation of the amount of heat
to increase, at least, three degrees the temperature of the air for entry into the chamber.
Using thermodynamics and heat transfer is possible to define the kilowatts required in
the resistors row for heating the air, and the amount of heat lost through the insulating
walls. This analysis is a little complicated due to the assumptions and the factors
involved in the calculation.
Solidworks (advanced software for mechanical design), is a complete program for
designing, which allows simulating events over created figures, and show results that
can be compared with the analytic part. For this specific case also shows the heating of
fluid when this is crossing the resistors and increasing the temperature. |
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