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Store: Technical Paper - High-Speed Machines
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Description: 33 page booklet covering Required Vibration
Analysis Techniques & Instrumentation on High-Speed Machines
Part
Number HSM-1 (33 page booklet) - $59
Highlights:
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This
paper covers how high frequency vibration analysis should be
performed including what analyzer types, transducers, instrument
specifications and transducer mounting techniques should be
employed.
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It
also covers special diagnostic techniques required for high
frequency analysis and describes what sets apart detection of
problems on sources generating these high frequencies from those
that generate more nominal frequencies in the region of 20 to
2000 Hz (1200 to 120,000 CPM). Primarily throughout the paper,
the term "High Frequency" will refer to machines having
vibration frequencies greater than or equal to 10,000 Hz (600,000
CPM).
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Some
of these machines themselves do not necessarily have high operating
speeds, but have components within them which generate these
high frequencies.
- Machines
generating such high frequency vibration and covered in the paper
include examples such as centrifugal air compressors which have
a number of sources generating frequencies much greater than 10,000
Hz, some of which are elaborated in tables.
- This
includes the fundamental gear mesh frequency (GMF) of the gear
set in these compressors which is often over 20,500 Hz (1,230,000
CPM).
- This
paper also covers evaluation of other high frequency machinery
such as refrigeration chillers outfitted with gearing having fundamental
gear mesh frequencies of approximately 8330 Hz (500,000 CPM).
- This
paper points out gears require frequency spans encompassing 3.25X GMF which may demand measurements exceeding 70,000 Hz (4,200,000
CPM) on machines such as the centrifugal air compressors.
- Thus,
major emphasis is focused on what types of transducers are required,
how they must be mounted, how to detect unwanted "noise"
in these measurements, etc. without employing the information
provided in this paper, information and data critically needed
to assess the condition of such high speed machinery can be lost
altogether.
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more detailed information, please call Technical Associates of Charlotte,
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