Mission Statement: Reduce the effect of fixture leakage on leakage data

Leakage Test Stand ImprovementMarie Rohrbaugh

BackgroundSituation: External Leakage Testing Important Test Should be very near zeroGoal: Reduce the effect of fixture leakage

on test data

Highly Concentrated Area

Vent Between O-rings to eliminate pressure build-up

Pulse Purge

Large o-ring seals 2 holes 180 degrees apart

Pressurize one side with Nitrogen

Large Surface Area

Vacuum Chamber

Nitrogen In

Function Tree

Block Diagram

Voice of the Engineer

Constraints Use of Nitrogen Gas 1 psi Vacuum 24V signal power supply Class10,000 Clean Room SAFE USERS

Necessary Tasks Change Plug Design (Interface with the

can) Pneumatics Design/Layout FMEA Software Controls Moog will provide Manufacturing Testing Maintenance and Training Plans

Benchmarks

Vented

Brainstorming Pulse with Nitrogen to both Large O-rings release to ambient on

opposite side Vent hole toggles between Nitrogen and

Vacuum

Brainstorming Always a Constant flow of Nitrogen to

Large Orings Vent hole Toggles between Vacuum and

Nitrogen

Brainstorming Constant Flow to large O-ring Vent hole Toggles between pressurized

Nitrogen and Ambient

Brainstorming Constant flow of Nitrogen to Large O-

rings Vent Hole has a constant Vacuum

Staffing

Feedback Improve Block Diagram to include a detailed

interface with the AGT and the two systems Team Must Understand functionality

Constraints vs. Functions If team believes another way is better, “ OK”

Timeline IP considerations: We will work it all out over

summer Drawings Test Specifications

Questions??