Note 1 to entry: The calculation of the reference load is given in 7.2.
ISO 22423:2019(en), 3.7
friction coefficient
flow resistance caused by rotational friction between the thrust runner
(3.1) and the top foil
Note 1 to entry: The measurement of the friction coefficient is described in Clause 8.
ISO 22423:2019(en), 3.9
take-off
stage aimed to secure the distance between the thrust runner
(3.1) and the top foil by developing an aerodynamic pressure between them
ISO 22423:2019(en), 3.2
bearing torque
torque value developed by rotational friction between the thrust runner
(3.1) and the top foil
Note 1 to entry: The measurement of the bearing torque is as described in 7.3.
ISO 22423:2019(en), 3.4
initial load
load
(3.5) exerted on the rotating system in the beginning
Note 1 to entry: It should be lower than the static load capacity and the load at which the lifetime of the bearing is determined, as explained in 7.4 and 9.2.
ISO 22423:2019(en), 3.6
static load capacity
maximum load
(3.5) value of a bearing in static state
Note 1 to entry: The measurement of the static load capacity is explained in 7.4.
ISO 22423:2019(en), 3.8
lifetime of bearing
total number of start–stop test cycles of the foil thrust bearing at which the coating layer disappears
Note 1 to entry: The measurement of the lifetime of bearing follows Clause 9.