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The Association of Asset Management Professionals or as we like to call it AMP (formerly the Association for Maintenance Professionals) has a mission to create a new era for the practice of maintenance, reliability in the context of asset management for organizations to enhance the delivery for the triple bottom line of economic prosperity, environmental sustainability and social responsibility.

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Recent Topics

Vibration limit for a 320 KW motor

Hello all, Group -1 machines, as defined in ISO 10816-3, have following specification: Rated power 300 KW to 50 MW; electrical machines with shaft height >= 315 mm. Electrical machines (like motors) have both power rating as well as shaft height; how will we decide the limits ? I have a case where motor power is 320 KW and shaft height <315 mm. Thank youRead More...

Geothermal Turbine close to Volcano

Yes the turbine is very close to the volcano which is producing immense amount of lava every day. see https://www.ruv.is/frett/2021/03/18/eldgosid-i-geldingadolum-i-beinni-utsendingu But it isn´t a trouble yet...but sudden vibration is after resent rebuild. Not immediately after start up though which is strange. Not much but more than it should. My opinion is that this is either Misalignment or bent shaft of generator. I was hoping if someone could have quick look of pictures and spectrums.Read More...
Last Reply By Registered Member · First Unread Post

Pump Vibration

Forum: Forum help
I need help guys. I have a vertical pump. Motor sits on top. Pump has a column. Installed in a pit with impeller, casing in the pit. Just to give you an idea of the pump type. Pump RPM is 1800, did bump test, got NF at 30 Hz. Vibrations meet specification when water level in pit is low. When water level is high, vibrations exceed specification. Predominant peak is at 1X. I will add more information as we discuss this further. Any help will be greatly appreciated.Read More...
Last Reply By Registered Member · First Unread Post

fluidizing blower high horizontal vibration(what else can be done, running out of ideas?)

Good day to all! May i humbly ask for your assistance if you already encountered similar problem. Thank you! EQUIPMENT: 350 HP 3594rpm FLUIDIZING BLOWER USED IN RECIRCULATING FLUIDIZED BED BOILER SYNOPSIS: IT HAS BEEN A LONG TIME PROBLEM THE HIGH DIRECTIONAL (HORIZONTAL) VIBRATION OF THE FLUIDIZING BLOWER IN OUR CFB BOILER UNIT. IN THE PAST, WE ADJUST THE TIGHTNESS OF THE BASEBOLTS CONNECTED TO THE CONCRETE AND THE HIGH VIBRATION SOMEHOW GOES DOWN. BUT TIME PASSES THAT IT CAN NO LONGER GO...Read More...
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Boiler Feed Pump Issue

Hello, I'm wondering if somebody has encountered an issue like this before. We have two Pacific BFPs driven by motors. Both pumps were recently rebuilt and they're both running high on the OB thrust bearing which is the inactive thrust bearing. The temps are ~205F but on the IB "active" side, they're 60F much cooler. We have checked the coupling, the alignment, the instrumentation, the clearance readings from the pump vendor and they all fall within OEM specs. The pump is 6 inch 10 stage.Read More...
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Effect of chemical composition of material on its stiffness.

Hi, We are facing a very interesting issue of high shaft vibration in one of the pinion shaft with operating speed of 69700 RPM for a IG compressor. The pinion shaft is a flexible rotor and has two critical speed within the operating speed, the OEM pinion shaft was of JIS standard (SNCM 420 material as per JIS G 4053-2016) and the newly manufactured pinion is as per EN10084 standard wherein the only variation is in the Chromium alloy % which is 1.5/1.8 % as per EN standrad and 0.4/0.6 % as...Read More...

Transformer electrical signature

Hello all, We can use electrical signature analysis or motor current signature analysis for fault identification in motors. Different patterns are observed in current/voltage spectra for different motor faults. I wanted to know if this technique is applicable to power transformer fault diagnosis or not. I did not find any reference on electrical signature for transformer fault diagnosis. Thank youRead More...

Electrical signature of transformer

Hello all, We can use electrical signature analysis or motor current signature analysis for fault identification in motors. Different patterns are observed in current/voltage spectra for different motor faults. I wanted to know if this technique is applicable to power transformer fault diagnosis or not. I did not find any reference on electrical signature for transformer fault diagnosis. Thank youRead More...

High temperature at pump NDE bearing

Hi friends we are facing high temperature issue in Water feed pump NDE ball bearing (7309 ( 2 bearings Back to back arrangement)). Pump specifications are given below 200 KW Rated pressure 11 Bar Sump lubrication type Manufacture :Thermomechnica pump Overall pump vibrations are well within the limit ( 4 mm/s rms at POV) We have dominant frequency at 1X, 2X along with 6X(VPF). Pump NDE bearing reached to 60 degrees within 2 hours of operation whereas Pump DE bearing temperature found as 45...Read More...
Last Reply By Registered Member · First Unread Post

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