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eswin paico

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GOOD, someone has information on the frequency of WEG engine failures.


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Eswin Paico 
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John from PA

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Care to elaborate?????????
fburgos

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You mean like... Rotor bar? Bearings? Natural frequencies? Please be more explicit on your post.
electricpete

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I googled weg engines... no result except weg electric motors.  I'm guessing op may have seen some discussion on this board about weg motors. 

In my limited experience, WEG motors had a bad reputation years ago, but they're doing better lately.  We have  two of them installed in the last few years... those two are doing fine.
fburgos

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Based on his other post he means electrical motor.

On Spanish we use the word "motor" for internal combustion engine and electrical motor, online translator isn't good with context
MarkL

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Reply with quote  #6 
I have an Inkling this thread is a continuation of the other thread on WEG motors the Op has started?


eswin paico

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Hi,
I just realized that there is a conversation about SEW engines. Sorry
I need to know frequency of faults of electric motor parts:
bars

WhatsApp Image 2018-08-06 at 8.25.46 AM.jpeg 



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Eswin Paico 
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Reply with quote  #8 
HI Eswin,

I assume English is not your native language.  Hopefully board members will take it easy.

Info such as rotor bar numbers is in my experience hard to come by.  Bearing frequencies will depend on the bearings installed and that info should be available from WEG.  There might be a 2nd plate on the motor with that info.  Quite a large motor and it should be on there.

Expect to see 63** bearings and for large motors they might add an N/NU series as well.  Usually small motors a 63** and a 62** unless pulley reduction then an NU*** at the drive side is common.

For the frequencies look up in your vibration software.  I have CSI which has a database of 80,000 or thereabouts. Hope this helps. rgds
ruben

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BUENO, alguien tiene informaciĆ³n sobre la frecuencia de fallas en el motor WEG.

[/CITAR]

MAIN  FRECUENCIES SOURCES ON A (AC) ELECTRICAL MOTOR:


ELECTRICAL

1. RBP (rotor bars pass), you need the number of the rotor bars on every AC motor. Pattern I suppose you know If you are CAT II.

2. SSP (Slots stator pass), you need the number of sltos fitted on the stator. Sometimes they generate Siren sound.

3. Design RPM and working Rpm for calculate slip frecuency.

4. Commanded by a fecuency variator? Then....possible bearings contamination specially opposite coupling bearing.

5. Feed line frecuency. Be carefull with 2xLF and 6xLF (fire frecuency). The last specially on DC motors.

MECHANICAL

1. Unbalance

2. Misalignment

3. Bearings faults, you need the bearing model and trademark and rpm.

4. Bearing cocked on shaft pattern.

5. Mechanical looseness

6. Coupling fault pattern (copling model you need).

I think you ask for this.

For the motor on your photograph ask to WEG
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