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Recent Topics

Noise electric motor

we have a big noise in the electrical motor which it drives the lube oil pump. 45 KW, 400 V - 50Hz The hydraulic motor pump Running speed Motor: 1480 CPM Bearing roller type: DE & NDE: 6314 /C3 unfortunately we are facing a problem in our software, in fact we use the screenshot from analyser Oneprod MVP2-2C to analyse the noise come from the motor. BPFO = 3.08 BPFI = 4.92 FTF = 0.38 2BSF = 2.05 Find attached the spectrums details. i suspect that BPFO was defect, but it is modulated by...Read More...
Last Reply By ai.engineer · First Unread Post

Noise in vertical electrical motor

we have a big noise in the electrical motor which it drives the lube oil pump. 95 KW, 400 V - 50Hz Running speed : 2980 CPM Bearing roller type: DE & NDE: 6314 /C3 unfortunately we are facing a problem in our software, in fact, we use the screenshot from analyser Oneprod MVP2-2C to analyse the noise. BPFO = 3.08 BPFI = 4.92 FTF = 0.38 2BSF = 2.05 1. As showning in the attached spectrum, there is a high peak at 281 Hz. 2. the carrier frequency at 413 Hz modulated by running speed doesn't...Read More...
Last Reply By ai.engineer · First Unread Post
DEAR ALL, please share your comments about one vibration found in bolt of Bearing box of Steam Turbine (Condensate Steam Turbine), I attached spectrum in Axial direction (16 mm/sec), this vibration is the highest in machine. have you been this kind of vibration before? what is the cause of high vibration in axial direction in this bolt?Read More...
Last Reply By ramonruiz · First Unread Post

AC motors

Is there a general guideline other than the rating on the motor that anyone is using to determine how hot is too hot for a bearing area on a motor? I take a look with IR monthly on NH3 compressors along with an ultrasound inspection. Is there a guideline based on the HP of the motor? I have read that a 250 HP motor should be no hotter than 140 F. A motor vendor says the they don't get worried until it hits the 165 to 170 F range. I have attached an IR that shows the temp is increasing. I...Read More...
Last Reply By Dave Reynolds · First Unread Post

Strange harmonics on horizontal pump

Hi all, it is my first post here, thank you in advance for all the answers. I have been monitoring 45 kW pump, ~1480 RPM and i have seen strange harmonics approx. at ~6,31 RPM, strongest on DE pump and motor side. I have checked bearings in manufacturer catalog and it says that these should be : Motor : 6313 DE/NDE Pump: QJ 313 DE / 2213 NDE None of the bearings fault frequencies match with 6,31 harmonics. The closest one are 2x BPFO motor bearing at 6,142, and pump BSF at 6,661. Pump vane...Read More...
Last Reply By Becar · First Unread Post

Calibration Management Software

EZmaintain
Hi Friends, we just built an Calibration Software Module at our Cloud base CMMS, I would be happy to share the link of various features offed by us https://www.ezmaintain.com/cmms/calibration-management/ I would like to know how many of you use Calibration software to manage calibration records, ISO documentation, etc..Read More...
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