View source for T12 & T13 Ball On Cylinder Lubricity Evaluator (BOCLE) & Scuffing Load - Ball On Cylinder Lubricity Evaluator (SL-BOCLE)

[[File:IMG 4455.JPG|400px|Right|thumb|BOCLE(Left) & SL-BOCLE(Right)]]  

Both the Ball On Cylinder Lubricity Evaluator (BOCLE) and the Scuffing Load - Ball On Cylinder
Lubricity Evaluator (SL-BOCLE) work on the principle of testing the lubricity of a fuel/lubricant. A non-rotating
ball is forced against a rotating cylinder. The cylinder is partially immersed in a bath of the fuel to  
allow the fuel to be constantly carried to the area of contact.  

The BOCLE & SL-BOCLE machines operate on much the same principals. They are nearly identically
constructed. They differ in:<br/>
1) The types of fuels they typically test.<br/>
2) The qualifying parameters and test methods (See ASTM link below).<br/>
3) The maximum load they can carry.<br/>
<br/>

The BOCLE is a wear test. A microscope and camera is used to quantify the size of the wear scar and record the appearance. 

The SL-BOCLE is a load carrying capacity test. A series of loads are applied until a sudden
change in the friction coefficient is observed (higher than 0.175). This load is used to characterize 
the lubricity behaviour of the fluid.<br/>
Note the suggested loading sequence in the operating manual.

[[File:IMG 4440.JPG|400px|right|thumb|Ball,Ring & Bath]]


In this Table some basic differences are presented:


[[File:BOCLE table 2.jpg]]

Both units are operated via a simulink interfaces found on the PC next to the units (Univ PC nr: 766118). 




== Documentation ==


=== User Manual ===
A single user manual exists for both machines.
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/BOCLE%20User%20Manual.pdf click here]
=== ASTM Standards ===
BOCLE (ASTM D5001)
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/ASTM%20D5001%20BOCLE.PDF click here]
<br/>
SL-BOCLE (ASTM D6078)
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/ASTM%20D6078%20SLBOCLE.PDF click here]

=== MSDS of relevant Chemicals ===
Acetone
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/MSDS%20Acetone.pdf click here]
<br/>
Isooctane
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/MSDS%20Isooctane.pdf click here]
<br/>
Isopropyl alcohol
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/MSDS%20Isopropyl%20alcohol.pdf click here]
<br/>
Reference fuels (A&B)
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/MSDS%20Ref%20fuels.doc click here]

=== Wiring, Flow & Instrumentation diagrams ===
Overall wiring diagram <br/>
BOCLE<br/>
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/BOCLE%20overall2012.pdf PDF]
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/BOCLE%20overall22012.vsd VISIO]<br/>
SL-BOCLE<br/>
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/SLBOCLE%20overall2012.pdf PDF]
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/SLBOCLE%20overall22012.vsd VISIO]



Detailed Opto wiring diagram <br/>
BOCLE<br/>
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/BOCLE%20wiring2012.pdf PDF]
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/BOCLE%20wiring22012.vsd VISIO]<br/>
SL-BOCLE<br/>
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/SLBOCLE%20wiring2012.pdf PDF]
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/SLBOCLE%20wiring22012.vsd VISIO]<br/>


Piping diagram (Air flow) 
Identical for both
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/BOCLE%20piping%20diagram.pdf click here]

== History of this Equipment ==
The equipment was recieved from Sasol in 2012 after being used there for a period of time.
The equipment was conntected to the OPTO 22 network in 2012 by Jacques Langenhoven to allow data
logging and control through the lab network and OPTO system.

However after series of renovations in the Tribology lab over a space of 5 years (2012-2017), the instruments fell out of use. 
They became redundant and several parts and wiring were lost or no longer functional.
In 2017 much work was done by Andrew Sakyi to reinstate both machines into good working conditions and communication to the OPTO system was established.

== Current/Previous projects ==

=== 2012 ===
Jacques Langenhoven, '''The commissioning of the BOCLE & SL-BOCLE in the Tribology lab'''<br/>
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/BOCLE%20report2012.pdf PDF]<br/>
[ftp://ragnarok.up.ac.za/publicftp/lab/Tribology/New%20Folder/BOCLE%20report22012.doc MS WORD]

=== 2017 ===
Andrew Sakyi, '''Reconditioning of the SL-BOCLE and BOCLE Instrument.'''<br/>
[http://chemeng.up.ac.za/wiki/index.php/Special:ListFiles Final Report document] <br/>
[http://chemeng.up.ac.za/wiki/index.php/Special:ListFiles Laboratory Report document]