Recent content by B T V Jagadeesh

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    High 2X vibration at NDE axial on 4-pole generator

    Mr. Udshred, Thank you for your response, I will try to gather SCL and orbit plots. Since the generators are at manufacture, I do not think there will be potential failure apart from the alignment (cardan shaft without any laser alignment, do you strongly suggest to align with laser alignment...
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    High 2X vibration at NDE axial on 4-pole generator

    Hi udshred, Does overhung configuration excites 2X axial and radial vibrations? This is a sleeve bearing generator
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    High 2X vibration at NDE axial on 4-pole generator

    Hi PhilCorso, Thank you for the response. 1) Do you have a vibration study of the period between the time the generator is on-line, and the time it stops rotating? The generator at test bed. 2) Is it a Salient-pole or a Non-Salient Pole machine? non-salient pole 3) Has it been tested without...
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    High 2X vibration at NDE axial on 4-pole generator

    Hi udshred, Here is the spectral data I got. Regarding test bed set-up, people normally does the straight edge alignment from drive motor to generator.
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    High 2X vibration at NDE axial on 4-pole generator

    Hi Mr. Phil, shimming problem will affect both 1X and 2X is it? these generators are with hydro dynamic bearings.
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    High 2X vibration at NDE axial on 4-pole generator

    Dear All, I have been seeing similar pattern in vibration spectra too often at test bed condition at manufacturer. Sometimes, 1X axial vibration is too-high, sometimes 2X axial vibration is too high, and sometimes only NDEA 2X vibration is too high, which result in high overall vibration for...
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