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UL Vibration Testing Apparatus P13471 Walter Bergstrom, Sean Coots, Spencer Crandell, Mark Ellison

UL Vibration Testing Apparatus P13471 Walter Bergstrom, Sean Coots, Spencer Crandell, Mark Ellison Faculty Advisor: Dr. Benjamin Varela. Background Information To pass safety requirements for certification the luminaires must meet a series of Underwriters Laboratories Inc. Standards

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UL Vibration Testing Apparatus P13471 Walter Bergstrom, Sean Coots, Spencer Crandell, Mark Ellison

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  1. UL Vibration Testing Apparatus P13471 Walter Bergstrom, Sean Coots, Spencer Crandell, Mark Ellison Faculty Advisor: Dr. Benjamin Varela • Background Information • To pass safety requirements for certification the luminaires must meet a series of Underwriters Laboratories Inc. Standards • A Vibration Test Stand is currently being used by Eaton Corporation to test pendant mount luminaires according to section 33 of the UL844 Standard. • The Current Vibration Test Stand is outdated, has multiple design flaws, and design documentation and drawings are non-existent • Cooper Crouse-Hinds would like a new modernized Vibration Test Stand to be developed that addresses some of the design flaws of the current system while maintaining UL844 Test Standards • Design Specifications • New design must have a total displacement of 1/32” and provide oscillations at 2000 cycles per minute • New design envelope should be equal to or smaller than current design • New design should allow for adjustment of stroke • Must be able to support multiple luminaires with multiple pipe sizes • Design Process • Identify faults with current system • Brainstorm multiple designs with multiple solutions to current faults • Weigh pros and cons of each design to eliminate weakest designs and select final design path • Review design for potential failure areas • Areas of potential failure were analyzed using ANSYS • Final Design • Crankshaft design for rotary to linear motion • Custom steel crankshaft connecting eccentric pin to linear slider • Two piece friction locking mechanism for stroke adjustment • Two locking T-blocks • Hand sliding for coarse adjustment • Set screw for fine adjustment • Linear slider mechanism to ensure linear motion • Contains crankshaft and eccentric pin for safety • Polycarbonate hatches allow for maintenance • Pillow block linear bearings Conclusions • The apparatus must meet the proposed deflection requirements of 1/32” • The apparatus will be tested for force required to bend the NTP pipe that will support the luminaire • Forces from inertia will not be tested since this portion of the design does not include a motor • Full testing will occur after Imagine RIT • Acknowledgements • Dr. Stephen Boedo • Dr. Mike Parthum • Ed Leubner • Joe Manahan • Eaton Corporation • Dave Hathaway • Rob Kraynik • Jan Maneti

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