Recent progress on the structural styles of journal foil gas bearings

With the rapid development of turbo-machinery, foil bearings became a very important type of high-tech mechanical components. Mechanical structure is one of the key influence factors on the progress of foil bearings. Different structure design characteristics of the bearings were described and compared by reviewing published results and patents. Future developments of the patents and models on foil journal bearings were presented to improve the current design structures. Finally, we know what will be done.