Tribological%20Analysis%20

1
Tribological Analysis Maintenance of Telescopes

• Bronson Libed
• W.M. Keck Observatory
• Mentor Craig Nance
• Summit Advisor Allen Agliam

2
Project Overview

• Upgrade existing system
• Improve current process of oil sampling
  analysis
• Update equipment lists, and implement electronic
  access
• Diagnose abnormal test results
• Troubleshoot test results
• Recommend solutions

3
Astronomys Big Picture
Astronomy
in aiding scientific discoveries to the world of
Tribology
to help determine the condition of machinery
studies the surfaces that oil interacts with
to prolong the telescope
4
What is Tribology?

• Tribology the study of the friction, wear, and
  lubrication of surfaces that rub against each
  other.1
• Samples are taken and tested for physical and
  spectrochemical properties
• Gives insight into the health of the machine
• Diagnostic tool for abnormal indications

http//www.proquipinc.com
http//www.indiana.edu
1Tribology, Wikipedia, the free encyclopedia,
22 June 2006 http//www.wikipedia.org/
5
Current Testing Process
6
Inventory Upgrade

Analysts Inc. Current Testing List
Updated Equipment List
New Proposed Testing List for Analysts Inc.

7
Electronic Upgrade

Analysts Inc. Online Account
Recent Oil Sample Results
Configure your own settings

8
Preventative vs. Predictive

• Preventative Maintenance
• Maintenance is done periodically
• Ex Changing car oil
• Predictive Maintenance
• Test results advise what actions are needed
• Ex Blood test results

9
Overall Tribology Status

• Currently 82 pieces of equipment are tested
• 10 is classified as Abnormal
• 90 is classified as Normal
• New Additions
• Facility, Instrument, and HBS Glycol Systems
• Diffusion Pump
• JLG Cranes
• Diesel Fuel

10
Abnormal Case Studies

• Two Abnormal Case Studies
• K2 HBS Hydraulic System
• High Levels of Silicon
• K1 Primary Dome Drive 3
• High Levels of Iron Silicon

11
Abnormal Case Study 1

• Silicon (dirt) is a measure of airborne dust and
  dirt contamination.2
• Dirt is comprised mostly of silicon and
  aluminum3
• Aluminum indicates wear from pistons or
  bushings.4

2Analysts Inc., Analysts Inc., 2001, Integrated
Web Solutions, 30 June 2006 http//www.analystsinc
.com/pdfs/BasicsOA.pdf 3Mark Barnes, Silicon
Doesnt Always Mean Dirt, Practicing Oil
Analysis Sept. 2002 http//www.practicingoilanalys
is.com/article_detail.asp?articleid377relatedboo
kgroupContaminationControl 4Analysts Inc.,
Analysts Inc., 2001, Integrated Web Solutions, 30
June 2006 http//www.analystsinc.com/pdfs/BasicsOA
.pdf
12
Is it Internal?
Abnormal Silicon Level
13
Is it Dirt?
14
Unknown Sealant

• Conclusion
• Not External Dirt
• Inconsistency in both systems
• Low Signs of Aluminum
• Sealant or grease containing Silicon
• Entry of contaminant unknown. The search
  continues

Abnormal Silicon Level
15
Abnormal Case Study 2

• Silicon (dirt) is a measure of airborne dust and
  dirt contamination. 5
• Iron is wear coming from gears, shafts,
  bearings, or housing. 6

5Analysts Inc., Analysts Inc., 2001, Integrated
Web Solutions, 30 June 2006 http//www.analystsinc
.com/pdfs/BasicsOA.pdf 6Analysts Inc.,
Analysts Inc., 2001, Integrated Web Solutions, 30
June 2006 http//www.analystsinc.com/pdfs/BasicsOA
.pdf
16
Dirty Little Dome Drive
Abnormal Silicon Level
17
Gear Wear
Abnormal Iron Level
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Oil Change?

• Conclusion
• Dirty Oil
• Iron
• Silicon
• Oil needs to be changed
• Not changed in recent years
• Priority on K1 Dome Drive G1-3
• Consider Oil Change for rest of the K1 Dome
  Drives

Abnormal Silicon Level
Abnormal Iron Level
19
Acknowledgements

• Craig Nance, Allen Agliam, Jamie Higginson
• W.M. Keck Observatory
• Analysts Inc.
• Center for Adaptive Optics
• Malika Bell Sarah Anderson
• University of Hawaii-Manoa
• This project is funded in part by the National
  Science Foundation Center for Adaptive Optics,
  managed by the University of California at Santa
  Cruz, AST 9876783.