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