A test rig was set up to check the static characteristics and temperature characteristics of the foil gas radial bearing. After applying different load and speed on the bearing

the bearing take off speed

friction moment and bearing temperature were measured respectively. Then

the bearing static characteristics and temperature characteristics in different load and speed were analyzed. Results showed that

since there was no gas film in the start-stop stage

the foil gas bearing friction torque peak appeared larger

but when reaching a certain speed (take off speed)

the friction torque would drop to a pole small value

and the steady-state after take-off speed bearing torque increased with the applied load and speed. In addition

the bearing temperature stabilized at a certain temperature in the stable operation stage. The bearing temperature rise was very small and increased approximately linearly with the speed and load.