I am now spamming two topics in a row.
I have a problem with end shield resonance vibration in an industrial motor. It 4000 HP 1500 rpm machine with newly modified bearing system.
I cannot change the excitation source which is however new anti-friction bearing(DGBB) in drive end. Bearings are...
Hi!
I would like to learn about troubleshooting. I am mechanical dude so especially vibration, overheating etc. problems are in the area of interest.
Can you suggest some online articles, e-books or normal books about this topic?
Hi!
I am choosing bearings for 8000HP 750 RPM generator, used directly coupled(flange mounted machine) to diesel engine.
Normally flanged sliding bearings are used in this type of machines. Do any of you have any experience about antifriction bearings in these applications? Special...
I am planning to make as accurate vibration model of electrical machine as possible with Ansys Workbench. Since now, I have only been using FEA modal analysis for vibration design. This is my first time to compute vibration responses. I want to include rotor unbalance excitation and...
Hello,
I am making a design of a blower. The impeller is rigidly coupled to the motor. Shall I design the system torsional natural frequencies to be above motor supply frequency (60Hz)? What about 2 x supply(120Hz) ?
Many thanks!
-S
Hello,
Motor bearings seems to be almost always 63-series type. Output shaft diameter seems to be dimensioning the bearings as far as I have been making arrangements. When modified lifetimes(Lhmr) of the bearings are considered motor bearings seems to exceeding easily "infinite life" of one...
Hi,
I am engineering a 6-pole motor. Now, I am making FEA modal analysis of the stator frame. From literature and experiment I know that in 2 pole machines the stator frame oval shaped modal frequency is kept sub-critical compared to 2 x supply frequency. That is because the 2-pole excitation...
