Gas journal bearing systems and related methods

• US 7,918,605 B2
• Filed: 09/29/2004
• Issued: 04/05/2011
• Est. Priority Date: 09/29/2004
• Status: Active Grant

• Current Assignee: United States Army (U.S. Department Of Defense)
• Original Assignee: The United States Of America As Represented By The Secretary Of The Army
• Inventors: Brown, Robert C.
• Primary Examiner(s): Hannon; Thomas R
• Assistant Examiner(s): Johnson; Phillip A
• Application Number:
  US10/956,591
• Publication Number:
  US 20100142868A1
• Time in Patent Office: 2,379 Days
• Field of Search: 384/100, 384/114, 384/109, 137808-813
• US Class Current: 384/100
• CPC Class Codes: F16C 32/0614 the gas being supplied under pressure, e.g. aerostatic bearings
• CPC Class Codes: F16C 32/0685 for radial load only

Abstract

Gas journal bearing systems are provided. An exemplary gas journal bearing system comprises a vortex generator, a housing and a journal. The vortex generator is operative to receive a flow of gas and to impart an angular acceleration to the gas. The housing is in fluid communication with the vortex generator, with housing having a first exhaust through which the gas is exhausted. The journal is supported within the housing by a vortex of the gas as the gas swirls along at least a portion of a length of the journal. Methods and other systems also are provided.

Claims

1. A gas journal bearing system comprising:

a vortex generator operative to receive a flow of gas and to impart an angular acceleration to the gas;

a housing in fluid communication with the vortex generator, the housing having a first exhaust vent through which the gas is exhausted; and

a journal supported within the housing by a vortex of the gas as the gas swirls along at least a portion of a length of the journal.

2. The gas journal bearing system of claim 1, wherein the journal rotates within the housing in a direction counter to the rotation of the gas within the housing.

3. The gas journal bearing system of claim 1, wherein:

the housing has a first end; and

the journal extends outwardly from the first end.

4. The gas journal bearing system of claim 3, wherein:

the housing has a second end; and

the journal also extends outwardly from the second end.

5. The gas journal bearing system of claim 3, wherein the first exhaust vent is located at the first end.

6. The gas journal bearing system of claim 5, wherein the journal extends through the first exhaust vent.

7. The gas journal bearing system of claim 1, wherein:

the angular acceleration imparted to the gas by the vortex generator is substantially oriented within a plane; and

the housing extends substantially perpendicular to the plane.

8. The gas journal bearing system of claim 1, wherein:

the vortex generator is a first vortex generator; and

the system additionally comprises;

a second vortex generator, the journal being supported by a second vortex associated with the second vortex generator.

9. The gas journal bearing system of claim 8, wherein:

the housing is a first housing; and

the system additionally comprises;

a second housing in fluid communication with the second vortex generator, the journal being supported within the second housing by the second vortex.

10. The gas journal bearing system of claim 8, wherein:

the first housing is spaced from the second housing; and

a portion of the journal spans between the first housing and the second housing such that the portion of the journal is configured to carry a load.

11. The gas journal bearing system of claim 10, wherein:

the journal has a first end and a second end;

the first end of the journal extends outwardly from the first housing; and

the second end of the journal extends outwardly from the second housing.

12. The gas journal bearing system of claim 1, further comprising:

a pressurized gas source in fluid communication with the vortex generator for providing the gas to the vortex generator.

13. The gas journal bearing system of claim 12, further comprising:

a nozzle positioned to receive the gas from the pressurized gas source and being operative to increase a velocity of the gas and provide the gas to the vortex generator.

14. The gas journal bearing system of claim 1, wherein the gas is air.

15. The gas journal bearing system of claim 1, wherein the housing is a tube.

16. A gas journal bearing system comprising:

a journal;

at least one exhaust; and

means for generating a vortex of gas in the shape of a spiral such that the vortex of gas supports the journal;

whereby the gas exits from the journal bearing system through the at least one exhaust.

17. The gas journal bearing system of claim 16, further comprising:

means for containing the vortex of gas.

18. A method for supporting a journal comprising:

providing a journal, a housing, a vortex generator and at least one exhaust; and

generating a vortex of gas such that the vortex of gas located in the housing surrounds and supports the journal as the vortex of gas spirals along the length of the housing toward the at least one exhaust.

19. The method of claim 18, further comprising:

supporting an axial load with the journal.

20. The method of claim 18, further comprising:

supporting a transverse load with the journal.

21. The method of claim 18, wherein:

the vortex is a first vortex; and

the method additionally comprises;

supporting the journal with a second vortex.