Activity

Reply by Shurafa

I doubt the speeds mentioned on the right side of the plots were actually measured values. By default CSI plots are designed to show the...
Shurafa

Reply by Rotating Guy

hi, Does the equipment run at its BEP? can you adjust the fmax to 800 and no of lines, and revert again. if you could get the phase for...
Rotating Guy

Reply by Boilermaker

I've been using the PLS Pocket LED Stroboscope it is from Monarch for several years now. It is small enough to put in my tool pouch on...

Reply by mohiuddin

I also observed first time..I am just surprising to see the comment by Rohit, well noticed by him. I will check what the issue is...

Reply by mohiuddin

Dear rohit..VFD is not installed and motor synchronous speed of 3000 rpm....and pump is directly coupled,,same rpm..might be rpm varying...

Reply by Jack1954

I go to a plant that switches their pumps on a regular basis, not sure what that is I go there monthly and the opposite pump from last...

Reply by Rohit02

Dear Mohiuddin Is this machine by any way a VFD drive? As the RPM mentioned on the spectrum is varying from 3288 to 2988 rpm. Secondly...

Reply by mohiuddin

I really appreciate your responses walt & shurafa....I'll must check for natural frequency. Whereas as per said of shurafa regarding...

Reply by Shurafa

I agree. I would also add the possibility of turbulence. It might be my first step to take data over several minutes or so to understand...
Shurafa

Reply by Walt Strong

Vertical pumps on vessels can have vibrations from other machines, so check into that first. Typically vertical pump can have one or...

Reply by Kishore kumar

Dear Beta, Could you please post the hole equipment vibration readings spectrum,so that we can understand the problem better.
Kishore kumar

Reply by Becar

More details please: bearings type, mark where exactly was your spectrum taken, any Peakvue spectrum, time waveform? Do you have some...
Becar

Reply by Walt Strong

There are a lot of products with choice and prices that depends on your needs. Here are some other choices with key features for...

Reply by Walt Strong

I saw the specifications here: https://hoto-instruments.com/p...ket-led-stroboscope/ It does not indicate there is external AC signal...

Reply by Big J

I love the HOTO ESL-200. Portable and very bright. https://www.amazon.com/Hoto-In...eywords=hoto+esl+200
Big J

Reply by Shurafa

Ali, I assume you mean that is the data you collected with the general purpose sensor reliable to give an early warning for gear faults?
Shurafa

Reply by John from PA

...and I will state again, you need permanently mounted accelerometers on the Voith unit, even perhaps two and at least one on what you...
John from PA

Reply by ALI HAIDERR

John Motor Speed is 1500RPM then voith speed is upto 7900 attached with LP compressor.Voith speed varies between 7500RPM to 7900RPM only...

Reply by John from PA

Based on your "pictorial" that shows the machinery arrangement, I think you have a Voith KGS drive that provides an increase in motor...
John from PA

Reply by ALI HAIDERR

Ralpha, Aplogized for late reply. Please see below real Picture but unfortunetly,I donot have full snap at the moment. Vibration...

Reply by Thimba

I will hopefully by next week when I'm fit to clime the ladder! But phase readings are not possible as I only have one input and one...

Reply by Walt Strong

PCB-IMI has an accelerometer (10-mv/g) with flat magnet base that is claimed to get 3-dB flat frequency response to 30 kHz! The kit is...

Reply by John from PA

Your anticipated frequencies are summarized below. Like Walt has said, the source of the components at 97594 CPM, 165281 CPM and 426750...
John from PA

Reply by Barry

How do you know I didn’t There is a great big real world out there that some live in that must get by with what they have to work with.

Reply by Barry

I agree with Ralph. I collected a lot of gear box data with a 100 mV/g acc on a two rail magnet (the square ones that CSI had back then)...

Reply by ALI HAIDERR

Ralph Stewart,Ali M. Al-Shurafa, Data taken by 100 mv/g sensor,with Fmax 10KHZ and LOR 6400. Dominant vibration peaks are 97594...

Reply by Shurafa

Nice report. I like the format. I'm not familiar with your equipment so I cannot really comment on the diagnosis. However, I've noticed...
Shurafa

Reply by Shurafa

Maybe if you give more information the forum members could help. General recommendations: Clean the bearing housing very thoroughly (no...
Shurafa

Reply by Shurafa

Good question and good discussion. I second the comments given on the limitations of the hardware: 1. Typical general purpose...
Shurafa

Reply by ALI HAIDERR

Thanks for your kind input. I just want to set up offline data collector periodically routine with 100mv/g sensor.We dont have 10 or 25...

Reply by John from PA

If indeed this is the case, in summary, monitoring with an off line data collector and 100 mV/g accelerometer, you should have stated...
John from PA

Reply by John from PA

I take note that the OP uses the term "monitoring" as opposed to "diagnostics". For routine day to day monitoring I don't feel 6400...
John from PA

Reply by Ralph Stewart

To get 1st gearmesh, you will need an Fmax of 10,000 Hz, and at least 6400 line (if possible) if your meter and 100 mV transducer can be...
Ralph Stewart
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