GENERATOR SET INTEGRATED GEARBOX

• US 20180145559A1
• Filed: 11/18/2016
• Published: 05/24/2018
• Est. Priority Date: 11/18/2016
• Status: Active Grant

• Current Assignee: Cummins Power Generation Limited (Cummins Incorporated)
• Original Assignee: Cummins Power Generation Limited (Cummins Incorporated)
• Inventors: Johnson, Paul D., Lobsiger, Kent A., Cheah, Sze Kwan, Amin, Tejaskumar Rajendrakumar, Goleczka, Peter Andrew
• Granted Patent: US 10,305,350 B2
• Time in Patent Office: Days
• CPC Class Codes: F02B 2063/045 Frames for generator-engine sets
• CPC Class Codes: F02B 63/04 for electric generators
• CPC Class Codes: F02B 63/044 the engine-generator unit being placed on a frame or in an housing
• CPC Class Codes: F16H 1/28 with gears having orbital motion
• CPC Class Codes: F16H 57/025 Support of gearboxes, e.g. torque arms, or attachment to other devices
• CPC Class Codes: F16M 1/00 Frames or casings of engines, machines or apparatus; Frames serving as machinery beds
• CPC Class Codes: H02K 7/116 with gears
• CPC Class Codes: H02K 7/1815 structurally associated with reciprocating piston engines general aspects of generating sets, e.g. housing, F02B63/04

Abstract

A generator set comprises an engine including a crankshaft rotatable in a first direction about a longitudinal axis of the generator set, and a generator including a generator shaft. A gearbox is positioned between the engine and the generator, all mounted on a chassis. The gearbox couples the crankshaft to the generator shaft. The gearbox includes a gearbox housing having a first end and a second end. The first end is coupled to an engine first end and the second end is coupled to a generator first end. The gearbox also includes a gear set including a plurality of gears, a first gear shaft coupled to a crank shaft first end, and a second gear shaft coupled to a generator shaft first end. The crankshaft and at least a portion of the plurality of gears, and the generator shaft are axially aligned along the longitudinal axis of the generator set.

Claims

1. A generator set, comprising:

an engine including a crankshaft rotatable in a first direction about a longitudinal axis of the generator set;

a generator including a generator shaft;

a gearbox positioned between the engine and the generator and coupling the crankshaft to the generator shaft, the gear box including;

a gearbox housing having a first end and a second end, the first end structured to couple to an engine first end of the engine and the second end structured to couple to a generator first end of the generator,

a first flange rigidly coupling the first end of the gearbox housing to the engine first end,

a second flange rigidly coupling the second end of the gearbox housing to the generator first end, and

a gear set including a plurality of gears, a first gear shaft coupled to a crankshaft first end of the crankshaft, and a second gear shaft coupled to a generator shaft first end of the generator shaft; and

a skid frame, each of the engine, the gearbox and the generator positioned on and rigidly coupled to the skid frame,

wherein the crankshaft, at least a portion of the plurality of gears, and the generator shaft are axially aligned along the longitudinal axis of the generator set, and

wherein the gearbox interfaces with the engine and the generator to form a rigid torque tube structure.

2. The generator set of claim 1, wherein the gearbox causes the generator shaft to also rotate in the first direction.

3. The generator set of claim 1, wherein the gearbox causes the generator shaft to rotate in a second direction opposite the first direction.

4. The generator set of claim 2, wherein the gearbox causes each of the engine, the gearbox and the generator to react in the same direction in response to a torque generated by the crankshaft.

5. The generator set of claim 1, wherein the first gear shaft and the crankshaft first end are coupled together via a flex plate.

6. The generator set of claim 5, further comprising:

a flywheel coupled to the crankshaft first end, the flywheel coupled to the flex plate.

7. The generator set of claim 6, wherein the flywheel is positioned within an internal volume defined by the gearbox housing.

8. The generator set of claim 1, wherein the second gear shaft and the generator shaft are coupled together via at least one of a rubber coupling or a viscous coupling.

9. The generator set of claim 1, wherein the gear set comprises:

a first pair of gears operably coupled to the crankshaft and the generator shaft via the first gear shaft and the second gear shaft, the first pair of gears axially aligned along the longitudinal axis of the generator set.

10. The generator set of claim 9, wherein the gear set further comprises:

a second pair of gears operably coupled to the first pair of gears, the second pair of gears axially offset from the longitudinal axis of the generator set.

11. The generator set of claim 1, wherein at least one of the first flange or the second flange includes an adaptor, the adaptor including a first piece and a second piece removably coupled to each other so as to allow access to a coupling positioned therewithin.

12. The generator set of claim 1, wherein the generator, the gear box and the engine mounted on the skid frame are structured to be securely positioned within an enclosure.

13. A gearbox for coupling a crankshaft of an engine to a generator shaft of a generator, comprising:

a gearbox housing having a first end and a second end, the first end structured to couple to an engine first end of the engine and the second end structured to couple to a generator first end of the generator, the gear box housing structured to be positioned on and rigidly coupled to a skid frame; and

a gear set including a plurality of gears, a first gear shaft and a second gear shaft, the first gear shaft structured to couple to a crank shaft first end of the crankshaft, and a second gear shaft structured to couple to a generator shaft first end of the generator shaft such that the crankshaft, at least a portion of the plurality of gears, and the generator shaft are axially aligned when the gearbox is coupled to the engine and generator.

14. The gearbox of claim 13, wherein the gearbox is structured to allow rotation of the crankshaft and the generator shaft in the same direction.

15. The gearbox of claim 13, wherein coupling of the gearbox housing to the engine and the generator causes the engine, the gearbox and the generator to form a torque tube structure, the torque tube structure reacting in the same direction in response to a torque generated by the crankshaft.

16. The gearbox of claim 13, further comprising:

a flex plate positioned on the first gear shaft, the flex plate structured to couple to a flywheel positioned on the crankshaft first end.

17. The gear box of claim 16, wherein the gearbox housing defines an internal volume, the flywheel positionable within the internal volume.

18. The gear box of claim 13, wherein the gear set includes:

a first pair of gears structured to couple to the crankshaft and the generator shaft via the first gear shaft and the second gear shaft, the first pair of gears oriented to axially align with a longitudinal axis of each of the crankshaft and the generator shaft.

19. The gear box of claim 18, wherein the gear set further includes:

a second pair of gears operably coupled to the first pair of gears, the second pair of gears axially offset from the first pair of gears.

20. The gear box of claim 13, further comprising:

a first flange rigidly coupling the first end of the gearbox housing to the engine first end, and

a second flange rigidly coupling the second end of the gearbox housing to the generator first end.

21. The gear box of claim 13, wherein at least one of the first flange or the second flange includes an adaptor, the adaptor including a first piece and a second piece removably coupled to each other, at least one of the first piece or the second piece removable to allow access to a coupling positioned therewithin.

22. The gearbox of claim 21, wherein the adaptor includes a plurality of openings defined in the first piece and the second piece, the plurality of openings structured to allow access to the coupling without uncoupling the first piece from the second piece.

23. A method of coupling a crankshaft of an engine to a generator shaft of a generator, comprising:

providing a gear box, the gearbox including a gearbox housing having a first end and a second end, and a gear set including a plurality of gears, a first gear shaft and a second gear shaft;

coupling the first end of the gearbox housing to an engine first end of the engine;

coupling the first gear shaft to a crankshaft first end of the crankshaft, at least a portion of the plurality of gears axially aligned with the crankshaft;

coupling the second end of the gearbox housing to a generator first end of the generator;

coupling the second gear shaft to a generator shaft; and

positioning each of the engine, the generator and the gearbox on a skid frame, the engine, the gearbox and the generator rigidly coupled to the skid frame,

wherein the coupling of the first gear shaft to the crankshaft and the second gear shaft to the generator shaft causes the crankshaft, at least a portion of the plurality of gears and the crankshaft to be axially aligned so that that the engine, the gearbox and the generator form a rigid torque tube structure.

24. The method of claim 23, wherein coupling of the first gear shaft to the crankshaft first end and the second gear shaft to the generator set first end allows the crankshaft and the generator shaft to rotate in the same direction.

25. The method of claim 23, wherein the coupling of the first end of the gearbox housing to the engine first end and the coupling of the second end of the gearbox housing to the generator first end causes each of the engine, the gearbox and the generator to react in the same direction in response to a torque generated by the crankshaft.

26. A generator set, comprising:

an engine including a crankshaft rotatable in a first direction about a longitudinal axis of the generator set;

a generator including a generator shaft;

a gearbox positioned between the engine and the generator and coupling the crankshaft to the generator shaft, the gearbox comprising;

a gearbox housing having a first end and a second end,

a first flange rigidly coupling the first end of the gearbox housing to an engine first end of the engine,

a second flange rigidly coupling the second end of the gearbox housing to a generator first end of the generator, and

a gear set including a plurality of gears, a first gear shaft coupled to a crankshaft first end of the crankshaft, and a second gear shaft coupled to a generator shaft first end of the generator shaft; and

a skid frame, each of the engine and the generator positioned on and rigidly coupled to the skid frame.

27. The generator set of claim 26, wherein the gearbox is configured to operatively couple the crankshaft to the generator shaft such the crankshaft and generator shaft are horizontally aligned, vertically aligned, or horizontally offset from each other.

28. The generator set of claim 26, wherein the gearbox is configured to cause the crankshaft and the generator shaft to be axially aligned, and wherein the gearbox includes planetary gears.