# US 2019/0170190 A1 · Air bearing and rotor system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170190 A1 - Document ID: US20190170190A1 - Status: Published application - Kind: A1 - Application number: 16/272,667 - Filed: 2019-02-11 - Published: 2019-06-06 - Earliest claimed: 2016-08-12 - Assignees: Industry-University Cooperation Foundation Hanyang University Erica Campus - Applicants: Industry-University Cooperation Foundation Hanyang University Erica Campus - Inventors: Keun RYU - Web page: https://patentgrep.com/patent/US20190170190A1 ## CPC - F16C 32/06: with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings - F04D 29/057: hydrostatic; hydrodynamic - F16C 17/024: {with flexible leaves to create hydrodynamic wedge, e.g. radial foil bearings} - F16C 17/042: {with flexible leaves to create hydrodynamic wedge, e.g. axial foil bearings} - F16C 27/06: by means of parts of rubber or like materials (F16C27/08 takes precedence; with sliding surfaces of rubber or synthetic rubber F16C33/22) - F16C 27/063: {Sliding contact bearings} - F16C 29/025: {Hydrostatic or aerostatic (this type of bearing for rotary parts F16C32/06)} - F16C 32/0603: {supported by a gas cushion, e.g. an air cushion} - F16C 2316/10: in medical appliances, e.g. in diagnosis, dentistry, instruments, prostheses, medical imaging appliances - F16C 2360/23: Gas turbine engines - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) ## Abstract Provided is a rotor system including: a rotating shaft structure including a shaft and a thrust disc formed in a radial direction of the shaft; at least one journal air bearing including a journal bearing support which is made of a rigid body to support a load applied to the shaft by air, a journal spring which encloses an outer surrounding surface of the journal bearing support to provide a elastic support force to the journal bearing support, and a journal damper which encloses the outer surrounding surface of the journal bearing support to dissipate energy from vibration applied to the journal bearing support; and at least one thrust air bearing including a thrust bearing support which is made of a rigid body to support a load applied to the thrust disc by air, a thrust spring which is positioned on one surface of the thrust bearing support to provide a elastic support force to the thrust bearing support, and a thrust damper which is positioned on one surface of the thrust bearing support to dissipate energy from vibration applied to the thrust bearing support. ## Claims ### Claim 1 An air bearing comprising: a bearing support which is made of a rigid body and is positioned outside a rotating shaft structure in a radial direction of the rotating shaft structure to support rotation of the rotating shaft structure by air; a spring which encloses an outer surrounding surface of the bearing support to provide a elastic support force to the bearing support; and a damper which encloses the outer surrounding surface of the bearing support to dissipate energy from vibration applied to the bearing support. ### Claim 2 An air bearing comprising: a bearing support which is made of a rigid body and is positioned on one side of a rotating shaft structure to support an axial load of the rotating shaft structure by air; a spring which is positioned on one surface of the bearing support to provide a elastic support force to the bearing support; and a damper which is positioned on one surface of the bearing support to dissipate energy from vibration applied to the bearing support. ### Claim 3 A rotor system comprising: a rotating shaft structure including a shaft and a thrust disc formed in a radial direction of the shaft; at least one journal air bearing including a journal bearing support which is made of a rigid body to support a load applied to the shaft by air, a journal spring which encloses an outer surrounding surface of the journal bearing support to provide a elastic support force to the journal bearing support, and a journal damper which encloses the outer surrounding surface of the journal bearing support to dissipate vibration applied to the journal bearing support; and at least one thrust air bearing including a thrust bearing support which is made of a rigid body to support a load applied to the thrust disc by air, a thrust spring which is positioned on one surface of the thrust bearing support to provide a elastic support force to the thrust bearing support, and a thrust damper which is positioned on one surface of the thrust bearing support to dissipate energy form vibration applied to the thrust bearing support. ### Claim 4 (depends on 3) The rotor system according to claim 3, wherein a first rotating impeller, the first thrust air bearing, the thrust disc, the second thrust air bearing, the first journal air bearing, a stator for providing a rotating force to the rotating shaft structure, the second journal air bearing and a second rotating impeller which is heavier than the first rotating impeller are disposed in the axial direction of the shaft. ### Claim 5 (depends on 3) The rotor system according to claim 3, wherein a first rotating impeller, the first journal air bearing, the thrust air bearing, the thrust disc, the second thrust air bearing, a stator for providing a rotating force to the rotating shaft structure or generating electricity, the second journal air bearing and a second rotating impeller which is heavier than the first rotating impeller are disposed in the axial direction of the shaft. ### Claim 6 (depends on 4) The rotor system according to claim 4, wherein a support surface of the second journal air bearing for supporting a load applied to the shaft by air is wider than that of the first journal air bearing for supporting the load applied to the shaft by air. ### Claim 7 (depends on 4) The rotor system according to claim 4, wherein a temperature of air flowing to the second rotating impeller is higher than that of air flowing to the first rotating impeller. ### Claim 8 (depends on 4) The rotor system according to claim 4, wherein the first housing supports one surface of the second thrust air bearing to provide a positioning force to the second thrust air bearing in an axial direction of the shaft, and supports a lateral surface and one surface of the first journal air bearing to provide a positioning force to the first journal air bearing in the axial direction of the shaft and in a radial direction of the shaft. ### Claim 9 (depends on 8) The rotor system according to claim 8, wherein the first housing extends beyond the thrust disc in a radial direction of the thrust disc, and the housing further has a second housing and a third housing which enclose an outside of the first housing. ### Claim 10 (depends on 4) The rotor system according to claim 4, wherein, if the load applied to the thrust disc toward the first rotating impeller is bigger than the load applied to the thrust disc toward the second rotating impeller, a support surface of the first thrust air bearing for supporting the thrust disc by the air is wider than a support surface of the second thrust air bearing for supporting the thrust disc by air. ### Claim 11 (depends on 4) The rotor system according to claim 4, wherein if the load applied to the thrust disc toward the second rotating impeller is bigger than the load applied to the thrust disc toward the first rotating impeller, a support surface of the second thrust air bearing for supporting the thrust disc by the air is wider than a support surface of the first thrust air bearing for supporting the thrust disc by air. ### Claim 12 (depends on 3) The rotor system according to claim 3, wherein a gap between the thrust air bearing support and the thrust disc of the rotating shaft structure is wider than that between the journal air bearing support and the rotating shaft structure in a radial direction.