|Description / Abstract
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|This part of ISO 10816 establishes provisions for evaluating the
severity of in-situ, broad-band vibration measured radial (i.e.
transverse) to the shaft axis on all main bearing housings or
pedestals and in the axial direction on thrust bearings. These are
in terms of:
— vibration under normal steady-state operating conditions;
— vibration during other (non-steady-state) conditions when
transient changes are taking place, including run up or run down,
initial loading and load changes;
— changes in vibration which can occur during normal
This part of ISO 10816 is applicable to heavy-duty gas turbine
sets used in electrical and mechanical drive applications, with
fluid-film bearings, outputs greater than 3 MW and an operating
speed range under load between 3 000 r/min and 30 000 r/min. This
includes gas turbines coupled to other rotating machinery either
directly or through a gearbox. In some cases, this part of ISO
10816 is not applicable to the evaluation of the vibration of the
coupled equipment (see the list of exclusions in this clause).
EXAMPLE For single-shaft combined-cycle power units in which a
gas turbine is coupled to a steam turbine and/or generator, the
evaluation of the gas turbine vibration is according to this part
of ISO 10816, but that of the steam turbine and generator is
according to ISO 10816-2 or ISO 10816-3.
This part of ISO 10816 is not applicable to the following:
a) aero-derivative gas turbines (including gas turbines with
dynamic properties similar to those of aeroderivatives);
NOTE ISO 3977-3 defines aero-derivatives as aircraft propulsion
gas generators adapted to drive mechanical, electrical or marine
propulsion equipment. Large differences exist between heavy-duty
and aero-derivative gas turbines, for example in casing
flexibility, bearing design, rotor to stator mass ratio and
mounting structure. Different criteria therefore apply for these
two turbine types.
b) gas turbines with outputs less than or equal to 3 MW (see ISO
c) gas turbine driven pumps (see ISO 10816-7);
d) coupled steam turbines and/or generators with outputs less
than or equal to 50 MW (see ISO 10816-3);
e) coupled steam turbines and/or generators with outputs greater
than 50 MW (see ISO 10816-2);
f) synchronizing clutches which couple the gas turbine to a
steam turbine or generator (see ISO 10816-2);
g) coupled compressors (see ISO 10816-3);
h) gearbox vibration (see this clause);
i) rolling element bearing vibration.
This part of ISO 10816 is applicable to other driven equipment
not included in this list of exclusions.
This part of ISO 10816 is applicable to machines which can be
coupled to a gearbox, but does not address the evaluation of the
vibration condition of those gears. Specialist techniques are
required for evaluating the vibration condition of gears which are
outside the scope of this part of ISO 10816.
The numerical values specified are not intended to serve as the
only basis for judging the severity of vibration. For gas turbine
sets, it is also common to judge the vibration based on
measurements taken on the rotating shafts. For such vibration
measurement requirements, see ISO 7919-1 and ISO 7919-4.
|Additional Supplemental Documents