1.what approximately is the bearing
high temperature alarm and shutdown setting?
High speed bearings are protected against high
temperatures. The high temperature alarm and shutdown instrument are generally
set at 95degee C and 105degee C (refer to the station drawings for the exact
settings/parameters).
2.What types of primary elements are used to measure the
compressor bearing temperature? Give example with the equipment name.
At lower range of temperature ‘RTD’ (resistance
temperature detector)is preferred to thermo-couples.
On dresser gas compressors: PT 100-RTD is used for measuring
the journal and thrust bearing temperature.
On solar gas compressors: ‘k’ type thermo-couple is used for
measuring the journal and thrust bearing temperature.
3.What maybe the reasons, if a compressor bearing
temperature increases?
The following are the possible for compressor bearing
temperature rise:
Defective bearing
Low lube oil supply pressure
Aged lube oil
Excessive compressor load
Dirty lube oil cooler
Lube oil cooler fan running at low speed
Defective thermostatic valve in the lube oil to
cooler line
4.which of the two-‘resistance and thermo-couple’- is
recommended for measuring a bearing temperature?
Resistance Temperature Detector- RTD is preferred over
thermo-couple for measuring the bearing temperature. RTD is more accurate and
linear in measuring temperature between the range -200degee C to +200degee C.
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