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Förnyelseprojekt av flödesmätare till bensinpumpar

Jibert, Johan LU (2010) MMK820 20092
Product Development
Abstract
This Master Thesis has been carried out for Dresser Wayne AB in Malmö, done at the Division of Machine Design, Department of Design Science at LTH, Lund’s Univer-sity. Dresser Wayne was interested in finding a new or improved flowmeter for their fuel-dispensers since the two current flowmeters were either expensive or having drift problems. Dresser Wayne also had their own idea of replacing the pistons in their piston flowmeter with diaphragms.

Ulrich & Eppingers product development methodology was used during this project. Ideas were generated and evaluated in a series of steps against different criteria, which encapsulated the whole product life span.

Different flowmeter technologies were studied, but the technologies that were... (More)
This Master Thesis has been carried out for Dresser Wayne AB in Malmö, done at the Division of Machine Design, Department of Design Science at LTH, Lund’s Univer-sity. Dresser Wayne was interested in finding a new or improved flowmeter for their fuel-dispensers since the two current flowmeters were either expensive or having drift problems. Dresser Wayne also had their own idea of replacing the pistons in their piston flowmeter with diaphragms.

Ulrich & Eppingers product development methodology was used during this project. Ideas were generated and evaluated in a series of steps against different criteria, which encapsulated the whole product life span.

Different flowmeter technologies were studied, but the technologies that were good enough were too expensive; instead, full focus was set on implementing diaphragms in the existing piston flowmeter. Rubber, metal and Teflon diaphragms were evalu-ated. The rubber diaphragms had a life span which was much shorter than desired, and were therefore no longer feasible alternatives. To gain a frequency that is low enough for the metal diaphragms, the diaphragms diameter had to be considerably large since the metal diaphragms had a very small deflection. This made the flow-meter almost five times larger than the flowmeter with pistons. The Teflon dia-phragms had a much larger deflection, making the flowmeter almost half the size of the metal diaphragm flowmeter. There were some doubts, however, that the Teflon might be inert to the different fuels, an issue which Dresser Wayne have to look up themselves in order to close the chapter on diaphragms. The Teflon diaphragm flow-meter also achieved a lower result than Dresser Wayne’s piston flowmeter in the last evaluation.

A new flowmeter was also designed, originally for a type of rubber diaphragm, but later redesigned for pistons. This flowmeter had three cylinder holes instead of one, like Dresser Wayne’s piston flowmeter, the iMeter, and were therefore called the triMeter. The triMeter had a different steering device, and will hopefully not have the same drift problems as the iMeter. The triMeter had a more simple design, but was also about 50 % larger than the iMeter. In the last evaluation, the triMeter achieved a higher result than the iMeter.

Dresser Wayne is recommended to finish the design of the triMeter and make tests to see if it actually is an improvement from the iMeter. (Less)
Please use this url to cite or link to this publication:
author
Jibert, Johan LU
supervisor
organization
alternative title
Renewal project of flowmeter for fuel dispensers
course
MMK820 20092
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Product development project, flowmeter, diaphragm, Ulrich & Eppinger's development methodology
language
Swedish
id
1737191
date added to LUP
2010-12-08 09:56:40
date last changed
2010-12-08 09:56:40
@misc{1737191,
  abstract     = {This Master Thesis has been carried out for Dresser Wayne AB in Malmö, done at the Division of Machine Design, Department of Design Science at LTH, Lund’s Univer-sity. Dresser Wayne was interested in finding a new or improved flowmeter for their fuel-dispensers since the two current flowmeters were either expensive or having drift problems. Dresser Wayne also had their own idea of replacing the pistons in their piston flowmeter with diaphragms.

Ulrich & Eppingers product development methodology was used during this project. Ideas were generated and evaluated in a series of steps against different criteria, which encapsulated the whole product life span. 

Different flowmeter technologies were studied, but the technologies that were good enough were too expensive; instead, full focus was set on implementing diaphragms in the existing piston flowmeter. Rubber, metal and Teflon diaphragms were evalu-ated. The rubber diaphragms had a life span which was much shorter than desired, and were therefore no longer feasible alternatives. To gain a frequency that is low enough for the metal diaphragms, the diaphragms diameter had to be considerably large since the metal diaphragms had a very small deflection. This made the flow-meter almost five times larger than the flowmeter with pistons. The Teflon dia-phragms had a much larger deflection, making the flowmeter almost half the size of the metal diaphragm flowmeter. There were some doubts, however, that the Teflon might be inert to the different fuels, an issue which Dresser Wayne have to look up themselves in order to close the chapter on diaphragms. The Teflon diaphragm flow-meter also achieved a lower result than Dresser Wayne’s piston flowmeter in the last evaluation.

A new flowmeter was also designed, originally for a type of rubber diaphragm, but later redesigned for pistons. This flowmeter had three cylinder holes instead of one, like Dresser Wayne’s piston flowmeter, the iMeter, and were therefore called the triMeter. The triMeter had a different steering device, and will hopefully not have the same drift problems as the iMeter. The triMeter had a more simple design, but was also about 50 % larger than the iMeter. In the last evaluation, the triMeter achieved a higher result than the iMeter.

Dresser Wayne is recommended to finish the design of the triMeter and make tests to see if it actually is an improvement from the iMeter.},
  author       = {Jibert, Johan},
  keyword      = {Product development project,flowmeter,diaphragm,Ulrich & Eppinger's development methodology},
  language     = {swe},
  note         = {Student Paper},
  title        = {Förnyelseprojekt av flödesmätare till bensinpumpar},
  year         = {2010},
}