Belshaw Brothers Inc.
By:Nathan Klosterman, Isaac Sprague,
Jaime Gilbert, Logan Crain, Nick Gosseen, and Jerrod Miller
• Silicon Boot that seals Cutter Head breaks after two weeks
• Lubricant and silicon boot pieces drop into donut batter
• Takes over two hours to replace boot with a new one
Problem Statement
• Eliminate lubricant leaking into the donut batter
• Design a boot that lasts longer
• Keep same mounting points
• Keep same plunger motion
• Shorter boot replacement time
Key Needs
Concepts• Boot redesign – longer lasting
Trip Arm Redesign• Detachable
• Machined Down
Concepts
• Cam Bearing Material Change
• Slide Plate Redesign
Concepts
• FE analysis of boot Design
• New design has 25% less stress
Final Design
First Choice
Second Choice
Boot Redesign – Comparative Stress Analysis
Final Design
Original – 100% 1st Choice – 100% 2nd Choice – 61%
• Analysis of Detachable Trip Arm
• New design is sufficiently strong 31% of Yield Strength
Final Design
• Tested of Machined Trip Arms
• Removed oil leak path Small amount of oil sticks to Drip Plate
• Use in conjunction with new Drip Plate design
Final Design
• Slotted Drip Plates No real advantage
• Use final design with machined Trip Arms
• Removes remaining oil path
Final Design
• Tested Oil-impregnated bronze bearing
• Max PV value-50,000 Calculated PV value-
812
• Test results Steel Bearing ~ Bronze Bearing ~
Final Design
Benchmarking
• Eliminate lubricant leaking into the donut batter Machined Trip Arms Drip Plate Redesign New Sleeve Bearing
• Design a boot that lasts longer New Design has 25% less stress
• Keep same mounting points Unchanged
• Keep same plunger motion Unchanged
• Shorter boot replacement time Detachable Trip Arms
• Belshaw Brothers Inc. Michael Wierman – Project Sponsor Laura Nash – Engineer
• MME Industrial Design Clinic Dr. Charles Pezeshki Dr. Kip Findley
• Dr. Mesarovic Harish Radhakrishnan
Acknowledgements
Questions
Recommended
