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RGf

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Posts: 78
Reply with quote  #16 
The top half is the one with the smaller pad and the oil port and slinger ring channels. The bottom is the full pad.
20171115_131357.jpg    20171115_131426.jpg   

Dendi

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Reply with quote  #17 
What is the current condition after repaired ?
Is the motor running well or any possibilities the symptom problem will be happened again by temperature ascending ? 
Is there any shim installed  / attached on the housing sleeve bearing DE ? what kind of bearing arrangement for sleeve bearing there ? Please check on the point of the bearing arragement if nothing wrong with BFP pump.

Please find out the bearing arrangement of siemens frame 580 Sleeve bearing Simens Motor (2).jpg 
 
 

John from PA

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Reply with quote  #18 
That bearing arrangement picture can be found on page 20 from https://www.industry.usa.siemens.com/drives/us/en/electric-motor/anema-motors/specification/Documents/InstrManual_Horiz_ODP_WPI_WPII_ANIM-03520pv.pdf.
RGf

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Posts: 78
Reply with quote  #19 
I've enlisted our nuclear NDE guys to do some testing on the failed bearing as far a Babbitt to shell adherence and particulate examination. Even though I'm on the fossil side of the house and nuclear is like their own company I find it is useful to cultivate the contacts on that side that may be helpful at times as they are more than willing to get into some non routine analysis. They have a world class NDE lab and one of the best chem labs in the Carolinas that handles fuels and lubricants. Their findings will clear up a lot of assumptions regarding this failure. We will be putting this power block back in service today and they will use this pump to fill the HRSG so I can see if our bearing replacement/oil changes made everything ok. More to come on this.
ivibr8

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Reply with quote  #20 
Do you have any data regarding the oil supply system?
I've seen fatigue related failures before but they also showed fatigue cracks at the load angle, hard to tell from the pictures but I'm not seeing that. 
What is the condition of the shaft...any signs of wiping/scoring there?

Also make sure the babbit thickness is as expected.

Lastly, are the recorded temps from an embedded RTD or oil discharge?

Keep us informed

Jim P
RGf

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Posts: 78
Reply with quote  #21 
Lubrication is from a reservoir with approximately 1 gallon of turbine oil (Mobil DTE 732) transported to the bearing with 2 slinger rings. The shaft was discolored but wiped clean with a rag and revealed no scoring or unusual wear patterns. 
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