Structural analysis of X-flo measure system
(2007) MMK920Innovation
- Abstract
- This thesis is done in cooperation with Dresser Wayne AB in Malmö and the objective has been to investigate if it is possible to use the X-flo meter, see Figure 1, in an LPG-dispencer. An increased pressure is used in the LPG-system, which involves a higher risk of leaking and strength problems.
During the development consideration has been taken to a new outlet, though other couplings are used in an LPG-dispencer. As criteria no stresses above yield strength should occur when loaded to an inner pressure of 50 bar. The maximum gap between the dome cover and the housing at 20 bar must not be exceeded when the new construction is exposed to 50 bar.
A measurement system, XWip, is mounted on the dome cover. This should, if possible, still be... (More) - This thesis is done in cooperation with Dresser Wayne AB in Malmö and the objective has been to investigate if it is possible to use the X-flo meter, see Figure 1, in an LPG-dispencer. An increased pressure is used in the LPG-system, which involves a higher risk of leaking and strength problems.
During the development consideration has been taken to a new outlet, though other couplings are used in an LPG-dispencer. As criteria no stresses above yield strength should occur when loaded to an inner pressure of 50 bar. The maximum gap between the dome cover and the housing at 20 bar must not be exceeded when the new construction is exposed to 50 bar.
A measurement system, XWip, is mounted on the dome cover. This should, if possible, still be able to be used on the dome cover after the construction changes.
By using the cad program SolidWorks the parts could be modelled and assembled. Changes in the parts could be done and evaluated in the finite element program Ansys Workbench. Knowing material data, stresses or gaps between contacts could be evaluated.
An overview analysis of the existing design, exposed to 50 bar, was made to identify the critical areas. The problem was, by this analysis, divided in smaller problems:
• Strengthening of the measuring surface on the dome cover
• The gap between the housing and the dome cover
vi
This resulted, after some development and with consideration of the new criteria for the LPG-system, in two new concepts where, in principal, the outlets distinguish between them.
These concepts where developed to reach the limitations set by the new criteria. The inside and the outside of the dome cover were strengthened to keep the stresses below the yield strength. The flange between the dome cover and housing were changed so that the yield strength in the housing was not exceeded.
To verify the analyses a strain gauge experiment was performed on the measuring surface on the dome cover. By measuring the strains, stresses could be calculated. The stresses from the experiment were 20 % lower than the calculations. The test did also show that plasticity was reached between 25 to 30 bar. In our analysis plasticity occurred at 26.5 bar, which shows that the analyses are very close to reality. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/1495117
- author
- Gustafsson, Anders and Johansson, Daniel
- supervisor
- organization
- course
- MMK920
- year
- 2007
- type
- H2 - Master's Degree (Two Years)
- subject
- language
- English
- id
- 1495117
- date added to LUP
- 2009-10-21 12:42:42
- date last changed
- 2010-02-01 14:40:04
@misc{1495117,
abstract = {{This thesis is done in cooperation with Dresser Wayne AB in Malmö and the objective has been to investigate if it is possible to use the X-flo meter, see Figure 1, in an LPG-dispencer. An increased pressure is used in the LPG-system, which involves a higher risk of leaking and strength problems.
During the development consideration has been taken to a new outlet, though other couplings are used in an LPG-dispencer. As criteria no stresses above yield strength should occur when loaded to an inner pressure of 50 bar. The maximum gap between the dome cover and the housing at 20 bar must not be exceeded when the new construction is exposed to 50 bar.
A measurement system, XWip, is mounted on the dome cover. This should, if possible, still be able to be used on the dome cover after the construction changes.
By using the cad program SolidWorks the parts could be modelled and assembled. Changes in the parts could be done and evaluated in the finite element program Ansys Workbench. Knowing material data, stresses or gaps between contacts could be evaluated.
An overview analysis of the existing design, exposed to 50 bar, was made to identify the critical areas. The problem was, by this analysis, divided in smaller problems:
• Strengthening of the measuring surface on the dome cover
• The gap between the housing and the dome cover
vi
This resulted, after some development and with consideration of the new criteria for the LPG-system, in two new concepts where, in principal, the outlets distinguish between them.
These concepts where developed to reach the limitations set by the new criteria. The inside and the outside of the dome cover were strengthened to keep the stresses below the yield strength. The flange between the dome cover and housing were changed so that the yield strength in the housing was not exceeded.
To verify the analyses a strain gauge experiment was performed on the measuring surface on the dome cover. By measuring the strains, stresses could be calculated. The stresses from the experiment were 20 % lower than the calculations. The test did also show that plasticity was reached between 25 to 30 bar. In our analysis plasticity occurred at 26.5 bar, which shows that the analyses are very close to reality.}},
author = {{Gustafsson, Anders and Johansson, Daniel}},
language = {{eng}},
note = {{Student Paper}},
title = {{Structural analysis of X-flo measure system}},
year = {{2007}},
}