Activity

Reply by Shurafa

The plot is not clear to me. Maybe you can upload a better resolution image so the forum members can comment. Regards- Ali M. Al-Shurafa
Shurafa

Reply by Walt Strong

" cut-off frequency is defined by a vibration sensor " This would suggest that the mounted natural frequency of the accelerometer...

Reply by Jaxn14

Hi Walt, Following what I got from sales, BCS: method for measuring bearing conditions using demodulation technique where the cut-off...

Reply by Walt Strong

Out of curiosity, I searched Schenck and BKvibro Web sites and did not find any good explanations. Did you contact factory or sales?

Reply by OLI

It may not do the miracle you are looking for there are a lot of things, cracks in foundation, any in the frame? Do they grease the...
OLI

Reply by OLI

You have some cracks in the foundation also. are they serious, if you measure vibration each side of the cracks is it the same vibration...
OLI

Reply by OLI

Well, if you answer some questions it is easier to reply. So how old are the pads? OEM normally state 10 years op time and shorter in...
OLI

Reply by Becar

I don't see any critical issues from your data sent. No obvious mechanical looseness, no critical vibration level. 1st peak amplitude is...
Becar

Reply by Becar

Have you any idea about the reason for key groove damage? If this happened before the shaft broke, you could have some torsional...
Becar

Reply by OLI

If you follow ISO recommendations, collect data as the ISO describe, Hor, Vert, Axial on the bearings. In my book I follow ISO 10816-1...
OLI

Reply by Becar

My advice: don't stick with the ISO10816 table. A 14 kW fan with vibration pads can be easily regarded as one ISO grade higher sometimes...
Becar

Reply by Walt Strong

I agree with Rohit about the balance machine qualification. It was a nice focused discussion by John and Bill about proximity probes! Walt

Reply by Rohit02

I think that the manufacturer is asking for the repeat-ability of the balancing machine. That too is considered important. For higher...

Reply by OLI

It is common for a bad selection and placement of these feet if you as normally are select them from the machine weight and in the chart...
OLI

Reply by William_C._Foiles

To amplify what JohnPa said, with circular motion any orthogonal probes will have a 90 degree relation, and any probe location would be...
William_C._Foiles

Reply by Becar

Good new anti vibration pads should have some obvious vibration amplitude difference between the upper and the lower part. But they can...
Becar

Reply by ConfMx

Hola a todos. I thank you for your kind comments. I was out of reach web, reason why I had not provided more information. The exact...

Reply by Akhil Rathore

what sensor you are using? 2200? i want to see the screenshot of the setup of this point. for that right click on the point MOV VIT...
Akhil Rathore

Reply by Walt Strong

You may want to post to this thread that has several experts on motors and VFD: https://www.eng-tips.com/threadminder.cfm?pid=237 Walt

Reply by Walt Strong

Imagine several "vibration experts sitting" on a park bench talking about baseball, or what ever. A small gust of wind blows a tiny...

Reply by Jason Tranter

Ah yes, quite correct. I answered too hastily. The graphic (from one of our simulators) illustrates John's correction.
Jason Tranter

Reply by John from PA

The relative phase between two transducers is also 90 deg when the major axis of the filtered orbit is directly in line with one of the ...
John from PA

Reply by Jason Tranter

I am going to guess that the OP is referring to the various training courses, pocket guides, and wall charts that may state, for...
Jason Tranter

Reply by William_C._Foiles

Interesting article, but I do not believe it is great nor the 30/30 rule. When you place a trial weight in the right location, you...
William_C._Foiles

Reply by Yousuf Masood

Tough more data is ideal but from what I can see from the attached spectrum is either there is a problem in accelerometer/connector...

Reply by Walt Strong

" I’m sure glad that “rules are made to be broken.” " I agree. I have used the 30/30 Rule many times, but I have also departed in many...

Reply by Walt Strong

Okay, so you have to be careful whether the dominant peak is at 2xSS or 60-Hz electrical noise. Are you using a portable analyzer and...

Reply by John from PA

https://www.reliableplant.com/...eld-balancing-rotors mentions a 30/30 rule as well as many other rules. Scroll down for the content...
John from PA

Reply by Walt Strong

I assume you have 50-Hz power and 4-pole motor-pump are direct coupled with horizontal shaft. The spectrum you provided is for motor...

Reply by Hassan engineer

Thanks my friends what make me think there is a problem to do the analysis is that the pump is running and the rms is very low perhaps...
Hassan engineer

Reply by Walt Strong

The vibration is very low at 0.016 mm/sec RMS Velocity. The dominant vibration frequency on motor is not an integer order of shaft...

Reply by Walt Strong

" A ratio of this vector change to the average vector can be useful as can just the magnitude of the vector change. " I agree, but I...

Reply by William_C._Foiles

Phase alone lacks the amplitude; phase plus amplitude will give the vector. Look at how the vector changes. A ratio of this vector...
William_C._Foiles

Reply by Walt Strong

The only "Rule" that mentions +/- 30-degrees is for Balancing, where this phase change amount is recommended for a good Trial Weight...

Reply by Shurafa

Do you mean that, in practice, the phase angle is considered stable if its value does not change a lot? Your definition of a lot of...
Shurafa
×
×
×
×