Final Presentation The University of Akron Advisor: Dr.

Final Presentation The University of Akron Advisor: Dr.

Final Presentation The University of Akron Advisor: Dr. Scott Sawyer 4/11/2019 Meet the Team Members Steve Gluck (Mentor), Wayne Ritchie, Madison Graham, Emily Dicks, Ariana Cupello About Us All seniors in Mechanical Engineering

Graduating in May of 2019 New to Fluid Power Designs Problem Statement Compete in Fluid Power Vehicle Challenge Sprint Race: 600 feet Efficiency Race: Travel maximum distance using pressurized accumulator (from a stop) Endurance Race: Approximately 1 mile time trial Summary of Midway

Presentation Design Objectives Fluid Power Circuit Design Hardware Selection Analysis using FEA Objectives Design Goals Design Outcomes Dual Front Wheels for Stability Stabilizer Wheels

Efficiency Challenge Component Attachment Direct Mesh on Drive Side Optimize Gear Ratios Optimized Gear Ratios Endurance Challenge Back Wheel Gear Hub

Dual Drive/Regeneration Circuits Dual Drive/Regeneration Circuits Run Simultaneously Rider Comfort Improved Valve Locations New Seat Fluid Circuit Design Pump Circuit - Powered by Pedal Input Reservoir and Ball

Valve Motor Pump Fluid Circuit Design Accumulation Circuit Charging Accumulator Accumulation Circuit Discharging Pressure Gauge

3-Way Ball Valve Reservoir and Pressure Relief Valve Reservoir 4-Way Valve Pump/Motor (Acting as Pump)

Pump/Motor (Acting as Motor) Hardware Selection Pedal Circuit Eaton 26002 RZC Pump 0.5 CIR Eaton 26 Series Motor 0.54 CIR Accumulation Circuit 1 Pint Accumulator Precharge pressure = 0.9*1500 = 1350 psi

5000 psi Pressure Relief Valve Parker F11-5 Motor Eaton 4-Way Valve Analysis Using FEA Tangential Load on a Gear Wt=Torque/radius Overall Load W=Wt/cos(phi) Analysis Using FEA

Vehicle Construction Disassembling previous bike Manufacturing Plate and Bars Cardboard Cutout Spacing With Washers 3D Printed Spacers Vehicle Construction Design/Build Reservoir Calculated volume of fluid needed Transparent design to monitor amount of fluid being used Two iterations to adjust length

Vehicle Construction Stabilizer Wheels Supports pumps on back wheel Prevents tipping/falling Finishing Touches Handlebars/Grips Painting Grind away excess bolts

Replace zip ties Vehicle Testing Vehicle Testing Team Member Sprint (100m) Efficiency Ariana

N/A N/A Emily 40 s 90 ft Madison Wayne 35 s

28 s Details Endurance (1 mi) Details N/A Bike was too large No-precharge

(2500 starting psi) 8 mins 15 sec Not charging 453 ft 1350 psi pre-charge 9 mins 47 sec Charging Intermittently

105 ft No-precharge (2500 starting psi) 7 mins 45 sec Not Charging 500 ft 1350 psi pre-charge 7 mins 35 sec

Charging Intermittently 92 ft No-precharge (2500 starting psi) 7 mins 1 sec Not Charging 492 ft 1350 psi pre-charge

7 mins 7 sec Charging Intermittently Testing and Improvements Precharge for endurance must be lowered ~500psi Rearranging components Remove rubbing points Viewing pressure gauge (proper orientation) Improve overall balance

Wheel axis bent True the wheel Cost Analysis Final Vehicle Design Lessons Learned Teamwork makes the dream work Focus on safety Work with vendors/suppliers More documentation Shipping process Hydraulic application

Thank You NFPA Parker Hannifin Steve Gluck - Team Mentor Bob - Wheel and Wrench Bike Shop Steve Gerbetz - UA Senior Technician Wade Nelson - Welding Master Dr. Scott Sawyer - Team Advisor

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