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Fluid-Power Bike for Racing Challenges: Purdue University Northwest Project

This presentation showcases the design process and modifications made to a fluid-power bike created by Purdue University Northwest students for racing competitions. The team addressed challenges, circuit designs, testing process, and lessons learned.

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Fluid-Power Bike for Racing Challenges: Purdue University Northwest Project

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  1. Final Presentation Purdue University Northwest Team Rick Rickerson & Prof. Ali 4/2/18

  2. Photo of Vehicle • Include a photo in this presentation. • Also send the photo as an attachment when submitting the presentation.

  3. 2018-19 PNW Team Students • Jacob Deakin • Mohamed Nasr • Charles Badillo MET • Brian Long • Sean Slouber • Ali Alsultan ECET Advisors • Prof. Ali • Prof. Higley • Rick Rickerson

  4. Problem Statement • A working vehicle must be created that converts mechanical/human power to fluid power to move a bike for 3 different races while adhering to all the NFPA competition rules.

  5. Midway Review • Extended the back wheel 6” for accumulator • Add a clamp to make the pump more adjustable • Gear up the pedals to obtain a higher RPM • Design a custom reservoir for the bike • Design an adjustable clamp for the accumulator • Motor/ Pump mounts made for adjustability • Ensure design is balanced

  6. Changes from Midway Review • No charging from low pressure • Using a belt and chain for main pump • Welding regenerative pump bracket • Using solenoids instead of ball valves • Used more compact line bodies • Modified brackets (motor, reservoir)

  7. Changes from Midway Review • Making back wheel adjustable for chain tension and alignment • Switched to stainless steel hoses • Changed gear ratio • Installed two downpipes for returns • Added a baffle to the reservoir

  8. Midway review • Original frame FEA stress • 6 forces loaded to frame

  9. Changes Because of Testing • Elimination of 3-way ball valve from circuit • Regenerative braking gear ratio • Added a chain tensioner (regen braking) • Nitrogen precharge for accumulator

  10. Midway Circuit Design • .54 in^3/ rev motor • .5 in^3/ rev main pump • .4 in^3/ rev regen pump • 2 3-way ball valves • 1 quart accumulator • 1 pressure relief valve • 1 manifold • 3 check valves • 1 pressure gauge

  11. Final Circuit Design • .54 in^3/ rev motor • .5 in^3/ rev main pump • .4 in^3/ rev regen. pump • 2 solenoids • 1 quart accumulator • 1 pressure relief valve • 1 manifold • 2 check valves • 1 pressure gauge

  12. Direct Drive Circuit • Pulls fluid from reservoir with pump • Fluid then powers motor and returns back to reservoir

  13. Regenerative Braking Circuit • Uses regenerative pump to push fluid into accumulator from reservoir by opening solenoid • Charges accumulator to store energy

  14. Discharge Circuit • Open discharge solenoid • Fluid then flows from accumulator to power the motor • Fluid then returns to reservoir

  15. Solidworks Design

  16. Constructing the Bike

  17. Constructing the Bike

  18. Testing the Bike https://youtu.be/t-fn6ncMSuE

  19. Lessons Learned • Hydraulic circuit design • Time management with ordering parts • Teamwork • The different types of fittings • Problem solving

  20. Questions & Comments

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