Squeeze film bearing mount

• US 4,440,456 A
• Filed: 03/24/1983
• Issued: 04/03/1984
• Est. Priority Date: 03/24/1983
• Status: Expired due to Fees

• Current Assignee: General Motors Corporation (Motors Liquidation Co. GUC Trust)
• Original Assignee: General Motors Corporation (Motors Liquidation Co. GUC Trust)
• Inventors: Klusman, Steven A.
• Primary Examiner(s): Levy, Stuart S.
• Assistant Examiner(s): Werner, David
• Application Number:
  US06/478,247
• Time in Patent Office: 376 Days
• Field of Search: 308/184 R, 308/184 A, 308/187, 308/189 R, 308/207 R, 384/99, 384/100, 384/103-106, 384/119, 384/124, 384/202, 384/215
• US Class Current: 384/582
• CPC Class Codes: F16C 19/26 with a single row of rollers
• CPC Class Codes: F16C 2360/23 Gas turbine engines in general F02C
• CPC Class Codes: F16C 27/045 with a fluid film, e.g. squeeze film damping

Abstract

A squeeze film damping type bearing mount between a bore in a support structure and an outer race of a shaft bearing, the bearing mount including a first adapter rigidly attached to the support structure with a cylindrical flange thereof projecting into the annulus between the bore and the outer race, a second adapter rigidly attached to the outer race with a cylindrical flange thereof projecting into the annulus radially outboard of the other flange, and a wave spring in the annular chamber between the two flanges to maintain concentricity between the outer race and the bore. The first adapter cylindrical flange cooperates with the outer race in defining an inner squeeze film annulus, the second adapter flange cooperates with the bore in defining an outer squeeze film annulus, and means are provided to maintain both annuli filled with hydraulic fluid to effect squeeze film damping.

Claims

1. In a shaft bearing mount in an annulus between a cylindrical bore in a support structure and a concentric cylindrical surface of a shaft bearing outer race, the combination comprising, a first adapter rigidly attached to said support structure having a cylindrical flange projecting into said annulus with an inner surface thereof cooperating with said bearing race outer surface in defining an inner squeeze film annulus, a second adapter rigidly attached to said outer race having a cylindrical flange projecting into said annulus radially outboard of said first adapter cylindrical flange with an outer surface of said second adapter flange cooperating with said bore in defining an outer squeeze film annulus, and means for maintaining each of said inner and said outer squeeze film annuli filled with hydraulic fluid so that oscillations of said outer race relative to said bore are fluid damped at each of said inner and said outer squeeze film annuli.

2. In a shaft bearing mount, the combination recited in claim 1 further including spring means between said first adapter cylindrical flange and said second adapter cylindrical flange operative to resist radial distortion of each of said inner and said outer squeeze film annuli and thereby maintain concentricity between said bore and said bearing race cylindrical surface under static conditions.

3. In a shaft bearing mount in an annulus between a cylindrical bore in a support structure and a concentric cylindrical surface of a shaft bearing outer race, the combination comprising, a first adapter having a base received in and rigidly attached to said bore and an integral cylindrical flange projecting into said annulus from one end with an inner surface thereof facing said bearing race cylindrical surface and cooperating with the latter in defining an inner squeeze film annulus, a second adapter having a base received around and rigidly attached to said bearing outer race and an integral cylindrical flange projecting into said annulus radially outboard of and from the opposite direction relative to said first adapter cylindrical flange thereby cooperating with the latter in defining an annular spring chamber, means on said second adapter cylindrical flange defining an outer surface facing said bore and cooperating therewith in defining an outer squeeze film annulus, a wave spring disposed in said annular spring chamber engaging each of said first adapter and said second adapter cylindrical flanges and operative to resiliently resist radial distortion of each of said inner and said outer squeeze film annuli so that concentricity is maintained between said bore and said bearing race cylindrical surface under static conditions, means for maintaining said annular spring chamber filled with hydraulic fluid at a supply pressure, and means in each of said first adapter and said second adapter cylindrical flanges defining bores between said annular spring chamber and respective ones of said inner and said outer squeeze film annuli so that said inner and said outer squeeze film annuli are maintained filled with hydraulic fluid at said supply pressure to damp oscillations of said outer race relative to said bore.