Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Belt-drive system for power transmission
Need to implement a large gear ratio of 75
2 different pump options but attachment design will be compatible for both
rotary: attach to end of belt-drive system
diaphragm: attach to slider crank mechanism
Implement pin attachment system to engage/disengage pump attachment assembly when traveling (bike moving) vs. pumping water (bike stationary)
Friction-drive system for power transmission
Engages with rear wheel
Compatible with rotary pump only
*Focus preliminary design around single speed bike
Accomplishments from Previous Week
Tested guzzler (diapraghm) pump and verified that it meets project deliverables agreed upon with sponsor
Finalized power transmission and pump attachment designs
Started CAD for all components
Purchased sediment filter for preliminary water filtration: https://www.amazon.com/Rusco-1-100ST-F-Polyester-Sediment-Trapper/dp/B005VPMMSW/ref=pd_ybh_a_3?_encoding=UTF8&psc=1&refRID=WYBRV4PN6V9SEF041S2K
Purchased components for belt-drive and friction-drive assemblies
Machined parts for rotary system with friction-drive
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Determine torque needed for diaphragm pump stroke - Derek
Machine hub for pedal/pulley attachment zone - Dennis
Assemble belt-drive once parts arrive (hopefully by Thursday) - Kyle, Dennis
Assemble friction-drive-Jessica, Brandon
Complete all CAD - Team
Run Matlab simulation to determine optimal dimensions for slider crank
Finalize slider crank dimensions + machine parts and purchase bearings - Jamie, Jessica
Test friction-drive vs. belt-drive performance - Team + sponsor
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Meeting in person 5/2/17
Wants to reconsider using friction drive since user could wash off sand/mud on wheels if near a water source
Action: Test belt-drive against friction drive to find optimal design choice
Schedule test of bike and OX-1 with Michael @ Mariam Bear Park to simulate pumping environment
Meet 5/14 for testing
Marshall's = good store for mechanical components i.e. bearings
More CAD is better for communication of design + animations for visual learning
Concern with feasibility of finding a bearing thin enough to fit with pedal on shaft
Permission to use sprockets and chain at least for initial prototype
Give sponsor 36 hour lead time if we need to request any materials from him
Beware of project and 156b deadlines; know when to move beyond theorizing stage and start pursuing/building a design!
Action: Clarify project timeline as a team
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Comments after Proof of Concept Presentation in presentation - 5/3/17
Dr. Silberman
Bike seat on graphic misleading --> Action: Be specific when discussing universal designs for bike vs. specific designs for OX1
Dr. Tustaniwskyj
Concerns regarding solar pasteurization treatment to obtain potable water --> Action: Look into reliable water treatment products/methods
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
Comments after Proof of Concept Presentation - 5/3/17
What filter did we decide to use?
Risks and Areas of Concern
Resources or Information Required but not Available
Schedule
Meet with Sponsor - Tues
Meet with Instructors - Wed
Testing belt-drive vs. friction drive with sponsor at Mariam Bear Park- Sun (5/14)
Budget (list amount spent and amount remaining)
$427.83 spent
$2,072.17 remaining
Progress on Report and Webpage
Report - 70%
Webpage - 50%