M00001310
New product
ISO 13939 1st Edition, August 1, 2012 Foil bearings - Guidelines for testing of the performance of foil journal bearings - Testing of load capacity, friction coefficient and lifetime
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Availability date: 07/13/2021
Description / Abstract:
This International Standard describes a method of comparing the
performance test results of foil journal bearings, which are
lubricated by air (gas) and supported by hydrodynamic force
generated by the rotation of the rotating shaft. The test procedure
proposed in this International Standard aims to predict and
evaluate the static load capacity, friction coefficient and
lifetime of the foil journal bearing, and compare the results with
those occurring under different test conditions, i.e. dimensions of
a foil bearing, rotational speed of a shaft, pressure and humidity
of surroundings and so on. The magnitude of the static load
capacity can change according to the test setting, as the test
conditions can be changed.
The test method described in this International Standard has the
following application coverage:
a) the criterion of the static load capacity is the
steady-state, i.e. it is applied in a limited operating condition
with a uniform magnitude, load direction and rotational speed;
b) the evaluation procedure can be applied only if the foil
journal bearing is under a uniform rotating inertia at an arbitrary
rotational speed;
c) the dynamic load with a time-variant magnitude and direction
is not taken into consideration;
d) for the purposes of this International Standard (these
guidelines), the configuration of a typical foil journal bearing is
presented in Annex A.