JOURNAL BEARING FOR A DIFFERENTIAL

• US 20160290396A1
• Filed: 04/03/2015
• Published: 10/06/2016
• Est. Priority Date: 04/03/2015
• Status: Abandoned Application

• Current Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Lemmers, Glenn C. Jr., Finke, Aaron M., Smith, Doren C., Grosskopf, Andrew P., Behling, David S.
• Application Number:
  US14/678,250
• Publication Number:
  US 20160290396A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F16C 17/028 with fixed wedges to generate hydrodynamic pressure, e.g. multi-lobe bearings
• CPC Class Codes: F16C 17/26 Systems consisting of a plurality of sliding-contact bearings
• CPC Class Codes: F16C 19/26 with a single row of rollers
• CPC Class Codes: F16C 19/54 Systems consisting of a plurality of bearings with rolling friction spindle bearings F16C35/08
• CPC Class Codes: F16C 21/00 Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement F16C17/24, F16C19/52 take precedence
• CPC Class Codes: F16C 2240/40 Linear dimensions, e.g. length, radius, thickness, gap
• CPC Class Codes: F16C 2240/42 Groove sizes
• CPC Class Codes: F16C 2240/70 Diameters; Radii
• CPC Class Codes: F16C 2326/43 Aeroplanes; Helicopters in general B64C
• CPC Class Codes: F16C 2361/61 Toothed gear systems, e.g. support of pinion shafts in general F16H57/02
• CPC Class Codes: F16C 2380/26 Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators in general H02K
• CPC Class Codes: F16C 33/1055 from radial inside, e.g. via a passage through the shaft and/or inner sleeve
• CPC Class Codes: F16C 33/106 Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
• CPC Class Codes: F16C 33/581 integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
• CPC Class Codes: F16H 2057/085 Bearings for orbital gears
• CPC Class Codes: F16H 47/04 the mechanical gearing being of the type with members having orbital motion
• CPC Class Codes: F16H 57/08 of gearings with members having orbital motion

Abstract

Embodiments herein relate to piece-part, sub-assembly, assembly, and component levels of a differential composed of a sun gear configuration and utilized in an integrated drive generator. An integrated drive generator is a hydro-mechanical transmission that drives a synchronous salient pole generator. The integrated drive generator is a constant speed output, variable speed input transmission that includes the differential and a hydraulic unit. In general, the integrated drive generator utilizes the variable speed input from an accessory gear box of an engine to drive or control a hydraulic unit, which in turn drives or controls a churn leg member of the differential. As the differential is driven, speeds of each speed member of the differential are then summed to generate the constant speed output to drive the synchronous salient pole generator.

Claims

1. A journal bearing for an integrated drive generator, comprising:

a bearing body having an inner diametric wall, an inner diametric edge, an outer diametric edge, an outer diametric wall, and an oil feed hole.

2. The journal bearing of claim 1, wherein a diameter of the journal bearing is 0.8975 inches.

3. The journal bearing of claim 1, wherein a width of the journal bearing is 0.454 inches.

4. The journal bearing of claim 1, wherein the outer diametric wall includes a groove.

5. The journal bearing of claim 4, wherein a diameter of the groove is 0.821 inches.

6. The journal bearing of claim 1, wherein a diameter of the outer diametric edge is 0.847 inches.

7. The journal bearing of claim 1, wherein a diameter of the inner diametric wall is 0.434 inches.

8. The journal bearing of claim 7, wherein a diameter of the inner diametric edge is greater than 0.434 inches.

9. The journal bearing of claim 1, wherein a surface connects the outer diametric wall with the outer diametric edge.

10. The journal bearing of claim 9, wherein the surface is angled at 45 degrees.

11. The journal bearing of claim 1, wherein the journal bearing is housed in a planet gear bore of a carrier shaft.

12. The journal bearing of claim 11, wherein the journal bearing is one of a plurality of journal bearings,

wherein the carrier shaft includes a plurality of planet gear bores,

wherein each planet gear bore is configured to house one bearing of the plurality of journal bearings.

13. The journal bearing of claim 12, wherein a plurality of planet gears are straddle mounted between first and second carrier platforms of the carrier shaft via the plurality of journal bearings.

14. The journal bearing of claim 1, wherein the journal bearing is included in a differential of the integrated drive generator,

wherein the differential is operatively coupled to an input system, and

wherein the differential is operatively coupled to a generator.

15. The journal bearing of claim 1, wherein the journal bearing is included in a differential of the integrated drive generator,

wherein the differential is in-line with a hydraulic unit of the integrated drive generator, and

wherein the hydraulic unit comprises at least one pump.