Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/35724

TitleA form-closed cam-follower mechanism for a breath simulator machine
Author(s)Oliveira, R.F.
Flores, Paulo
Teixeira, S. F. C. F.
Marques, H.M.C.
Teixeira, J. Carlos
KeywordsForm-closed
Cam-follower mechanism
Breath simulator
Project
Synthesis
Issue date2015
PublisherSpringer
JournalMechanisms and Machine Science
Abstract(s)The worldwide incidence of asthma yields 250 000 deaths annually, being almost all of these deaths avoidable. The inhalation therapy is the preferable route to deliver bronchodilator/antiinflammatory drugs to the patient lungs. Within this route of treatment, pressurized metered dose inhalers (pMDI’s) are the cornerstone devices. When coupled with a valved holding chamber (VHC), its efficiency increases and the limitations almost vanish. The VHC devices efficiency is something of interest to measure. For that, it is necessary an experimental setup that evaluates the amount of drug delivered by the device. This setup shall replicate a human breath waveform as input, therefore a breath simulator machine was build. The report herein describes the project process of the form-closed cam-follower mechanism necessary to replicate the waveform. The design and dimensional constrains are input in the cam design, leading to a piston diameter of 63.0 mm and a cam base diameter of 250.0 mm. A performance analysis to the pressure angle, curvature radius and backlash impact force, is reported. It can be concluded that a larger diameter would improved the performance results substantially. A future experimental validation will be in order, with the resource to a LVDT sensor.
TypeConference paper
URIhttp://hdl.handle.net/1822/35724
ISBN9783319094106
DOI10.1007/978-3-319-09411-3_14
ISSN2211-0984
Publisher versionhttp://link.springer.com/chapter/10.1007%2F978-3-319-09411-3_14
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CAlg - Artigos em livros de atas/Papers in proceedings
DEM - Publicações em actas de encontros científicos / Papers in conference proceedings

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