Self aligning bearing and seal assembly

• US 8,398,310 B2
• Filed: 09/22/2008
• Issued: 03/19/2013
• Est. Priority Date: 04/21/2008
• Status: Active Grant

• Current Assignee: Reladyne Reliability Services Incorporated
• Original Assignee: Colfax Fluid Handling Reliability Services Co. (Enovis Corp.)
• Inventors: Ehlert, Charles Wayne, Duncan, Patrick Wilson
• Primary Examiner(s): Charles, Marcus
• Application Number:
  US12/452,133
• Publication Number:
  US 20100135606A1
• Time in Patent Office: 1,639 Days
• Field of Search: 384/192, 384/203, 384/206, 384/213, 384/154, 384474-475, 384/477, 384/495, 384/498, 384/536, 384/492, 384/558
• US Class Current: 384/495
• CPC Class Codes: F16C 19/06 with a single row or balls
• CPC Class Codes: F16C 23/08 self-adjusting
• CPC Class Codes: F16C 33/6659 Details of supply of the liquid to the bearing, e.g. passages or nozzles
• CPC Class Codes: F16C 33/6685 Details of collecting or draining, e.g. returning the liquid to a sump
• CPC Class Codes: F16C 33/76 of ball or roller bearings
• CPC Class Codes: F16C 35/042 Housings for rolling element bearings for rotary movement
• CPC Class Codes: F16C 35/077 between housing and outer race ring

Abstract

A self aligning bearing and seal assembly including a bearing housing operable to mount to a surface, a bearing unit seated within the bearing housing and having an outer race, an inner race, and at least one ball intermediate the outer and inner race. The self aligning bearing and seal assembly also includes a pivot assembly having a shaft sleeve operable for receiving and maintaining a rotatable shaft and being disposed in the bearing housing and in operational contact with the inner race of the bearing unit. The pivot assembly allows for a degree of angular misalignment between the surface and the shaft greater than three degrees.

Claims

1. A self aligning bearing and seal assembly, comprising:

a bearing housing defining an internal cavity and being operable to mount to a surface;

a pivot assembly having a bearing holder operable for receiving and maintaining a rotatable shaft, the pivot assembly being disposed in the bearing housing;

a bearing unit disposed within the pivot assembly being in operational contact with the pivot assembly; and

a plurality of bearing and housing seals located about the bearing unit,

wherein the pivot assembly maintains the alignment and integrity of the bearing unit, the bearing and housing seals, and the shaft up to 20 degrees of displacement between the surface and the rotatable shaft; and

wherein the pivot assembly is lockable to the bearing housing to prevent relative movement during operation.

2. The self aligning bearing and seal assembly of claim 1, wherein the pivot assembly is comprised of an outer race, an inner race, and at least one ball intermediate the outer race and inner race.

3. The self aligning bearing and seal assembly of claim 1, wherein the pivot assembly further comprises a locking sleeve shaft retainer operable to retain the rotatable shaft in position.

4. The self aligning and bearing assembly of claim 3, wherein the locking sleeve shaft retainer allows the shaft to comprise a smooth shaft and requires no machining of the shaft.

5. The self aligning and bearing assembly of claim 1, further comprising:

a lubrication inlet disposed into the pivot assembly; and

a lubrication outlet disposed into the pivot assembly, wherein lubricant is injected via the lubrication inlet, and wherein the lubricant is vented from the lubrication outlet.

6. The self aligning and bearing assembly of claim 1, wherein the bearing housing forms an interior surface on which the seat of the pivot assembly is configured to rotate to support degree of displacement between the surface and the shaft.

7. The self aligning and bearing assembly of claim 6, wherein the interior surface is curved.

8. The self aligning and bearing assembly of claim 1, wherein the self aligning and bearing assembly is configured to mount with the rotatable shaft in a horizontal or vertical orientation.

9. The self aligning and bearing assembly of claim 1, wherein the self aligning and bearing assembly is reconfigurable to allow for thrust load in any direction.

10. The self aligning and bearing assembly of claim 1, wherein the bearing unit is selected from the group consisting of angular contact bearings, deep grove ball bearings, tapered roller bearings, cylindrical roller bearings, ball bearings, self aligning ball bearings, spherical roller bearings, toroidal roller bearings, thrust bearings, cylindrical roller thrust bearings, spherical roller thrust bearings, needle bearings, sleeve bearings, plain bearings, and journal bearings.

11. The self aligning bearing and seal assembly of claim 1, further comprising an accelerometer port disposed within the housing.

12. The self aligning bearing and seal assembly of claim 1, further comprising an thermocoupler port disposed within the housing.

13. The self aligning bearing and seal assembly of claim 1, further comprising at least one wave washer disposed within the pivot assembly and about the bearing unit to maintain the bearing unit in position and to reposition the bearing unit as required.

14. A self aligning bearing and seal assembly, comprising:

a bearing housing defining an internal cavity;

a pivot assembly defining a seat and having a shaft sleeve operable for receiving and maintaining a rotatable shaft and a bearing unit, the pivot assembly being disposed in the bearing housing; and

a plurality of bearing and housing seals located about the bearing unit,

wherein the pivot assembly maintains the alignment and integrity of the bearing unit, the bearing and housing seals, and the shaft up to 20 degrees of displacement between the surface and the rotatable shaft; and

wherein the pivot assembly is lockable to the bearing housing to prevent relative movement during operation.

15. The self aligning bearing and seal assembly of claim 14, wherein the bearing unit is disposed within the pivot assembly and includes an outer race, an inner race, and at least one ball intermediate the outer and inner race, the inner race being in operational contact with the shaft sleeve of the pivot assembly.

16. The self aligning and bearing assembly of claim 15, further comprising a bearing holder provided adjacent the outer race ring of the bearing unit.

17. The self aligning bearing and seal assembly of claim 14, wherein the pivot assembly further comprises a locking sleeve shaft retainer operable to retain the rotatable shaft in position.

18. The self aligning and bearing assembly of claim 14, further comprising:

a lubrication inlet disposed into the pivot assembly; and

a lubrication outlet disposed into the pivot assembly, wherein lubricant is injected via the lubrication inlet, and wherein the lubricant is vented from the lubrication outlet.

19. The self aligning and bearing assembly of claim 14, wherein the bearing housing forms an interior surface on which the seat of the pivot assembly is configured to rotate to support degree of displacement between the surface and the shaft.

20. The self aligning and bearing assembly of claim 19, wherein the interior surface is curved.

21. The self aligning and bearing assembly of claim 14, wherein the self aligning and bearing assembly is configured to mount with the rotatable shaft in a horizontal or vertical orientation.

22. The self aligning and bearing assembly of claim 14, wherein the bearing unit is selected from the group consisting of angular contact bearings, deep grove ball bearings, tapered roller bearings, cylindrical roller bearings, ball bearings, self aligning ball bearings, spherical roller bearings, toroidal roller bearings, thrust bearings, cylindrical roller thrust bearings, spherical roller thrust bearings, needle bearings, sleeve bearings, plain bearings, and journal bearings.

23. The self aligning bearing and seal assembly of claim 14, further comprising at least one wave washer disposed within the pivot assembly and about the bearing unit to maintain the bearing unit in position and to reposition the bearing unit if required.

24. The self aligning bearing and seal assembly of claim 23, wherein the at least one wave washer allows axial movement of the bearing unit due to thermal expansion or contraction of the shaft.

25. The self aligning bearing and seal assembly of claim 23, wherein the at least one wave washer prevents excess overloading of the assembly.

26. The self aligning and bearing assembly of claim 16, further comprising:

a lubrication inlet disposed into the pivot assembly for allowing a lubricant to be injected into the pivot assembly;

a lubrication outlet disposed into the pivot assembly for allowing the lubricant to be vented from the pivot assembly;

at least one wave washer disposed within the pivot assembly and about the bearing unit to maintain the bearing unit in position and to reposition the bearing unit if required;

wherein the at least one wave washer allows axial movement of the bearing unit along a sliding surface located between the bearing unit and the bearing holder, and wherein the sliding surface is completely contained within a lubricated portion of the pivot assembly so as to be protected from environmental contamination.

27. A self aligning bearing and seal system, comprising:

a radial bearing assembly operable to mount to a first side of a surface;

a radial pivot assembly disposed within the radial bearing assembly and comprising a first seal and a first bearing unit, wherein the first seal and first bearing unit are disposed to a first sleeve operable to receive a rotatable shaft;

a thrust bearing assembly operable to mount to a second side of a surface; and

a thrust pivot assembly disposed within the thrust bearing assembly and comprising a second seal and a second bearing unit,

wherein the second seal and second bearing are disposed to a second sleeve operable to receive the rotatable shaft;

wherein the radial bearing assembly and the thrust bearing assembly cooperate to allow misalignment between respective surfaces of the assemblies and the rotatable shaft up to 20 degrees; and

wherein the radial pivot assembly is lockable to the radial bearing assembly to prevent relative movement during operation.

28. The self aligning bearing and seal system according to claim 27, wherein the misalignment is caused by nonaligned bearing housings.

29. The self aligning bearing and seal system according to claim 27, wherein the misalignment is caused by nonparallel bearing housing mounting surfaces.