Shaft alignment tools and methods

Patent metadata

Field	Value
Publication number	US-8955230-B2
Application number	US-201213494577-A
Country	US
Kind code	B2
Filing date	Jun 12, 2012
Priority date	Jun 12, 2012
Publication date	Feb 17, 2015
Grant date	Feb 17, 2015

Abstract

The present disclosure is directed to a shaft alignment tool including a center hub and a plurality of adjustable arms. The plurality of adjustable arms are coupled to the center hub and include a proximal end section and a distal end section. The shaft alignment tool further includes one or more roller assemblies mounted on each distal end section of each adjustable arm.

First claim

What is claimed is:

1. A shaft-to-shaft alignment tool comprising:
a center hub;
a plurality of adjustable arms, each of the plurality of adjustable arms being coupled to the center hub via a proximal end section of each adjustable arm; and
one or more roller assemblies mounted on a distal end section of each adjustable arm,
wherein the center hub is rotatably mounted via the adjustable arms and the roller assemblies to a housing of a first shaft,
wherein the center hub is configured to receive an alignment meter mounted thereon and rotate the alignment meter about an axis of the first shaft, and
wherein the alignment meter, when rotated with the center hub, is configured to measure an alignment of a second shaft with the first shaft without rotation of the first shaft and the second shaft.

2. The shaft-to-shaft alignment tool of claim 1 , wherein the one or more roller assemblies includes two roller assemblies.

3. The shaft-to-shaft alignment tool of claim 2 , wherein the two roller assemblies are located normal to one another.

4. The shaft-to-shaft alignment tool of claim 3 , wherein a first of the two roller assemblies rotates about an axis approximately aligned with a longitudinal axis of the adjustable arm on which the first roller assembly is mounted.

5. The shaft-to-shaft alignment tool of claim 1 , further including a magnet coupled to each of the plurality of adjustable arms.

6. The shaft-to-shaft alignment tool of claim 5 , wherein the magnet is coupled to the distal end section of each of the plurality of adjustable arms.

7. The shaft-to-shaft alignment tool of claim 1 , wherein the plurality of adjustable arms extend approximately radially from the center hub.

8. The shaft-to-shaft alignment tool of claim 7 , wherein at least one of the plurality of adjustable arms is biased radially outward.

9. The shaft-to-shaft alignment tool of claim 8 , wherein the at least one adjustable arm is biased radially outward by a spring.

10. The shaft-to-shaft alignment tool of claim 7 , wherein the plurality of adjustable arms are received in a groove of the center hub.

11. The shaft-to-shaft alignment tool of claim 7 , wherein the plurality of adjustable arms includes three arms.

12. The shaft-to-shaft alignment tool of claim 1 , wherein the first shaft is recessed within a bore of the housing of the first shaft, and the center hub is mounted across the bore without interference with the first shaft.

13. The shaft-to-shaft alignment tool of claim 1 , wherein the alignment meter includes at least one of a laser transmitter, laser receiver, or a dial gauge.

14. A method of aligning a first shaft and a second shaft using a shaft-to-shaft alignment tool having a center hub and a plurality of arms extending from the center hub, the method comprising:
positioning the center hub within a housing bore aligned with the first shaft;
adjusting the arms to rotatably mount the center hub in the housing bore;
mounting an alignment meter on the center hub;
rotating the center hub with the alignment meter mounted thereon along the housing bore; and
performing the radial alignment between the first shaft and a second shaft based on the rotating of the center hub without rotation of the first shaft and the second shaft.

15. The method of aligning of claim 14 , further including biasing at least two of the arms against the housing bore.

16. The method of aligning of claim 14 , wherein the alignment meter includes one of a laser transmitter, a laser receiver, or a dial gage.

17. The method of aligning of claim 14 , further including magnetically coupling the alignment tool to the housing bore.

18. A shaft-to-shaft alignment tool comprising:
a center hub;
a plurality of adjustable arms extending radially from respective grooves formed in the center hub, the plurality of adjustable arms including a proximal end section and a distal end section; and
a first and second roller assemblies mounted on each distal end section of each adjustable arm, the first roller assembly being positioned approximately normal to the second roller assembly; and
an alignment meter coupled to the center hub,
wherein the center hub is rotatably mounted via the adjustable arms and the roller assemblies to a housing of a first shaft,
wherein the center hub is configured to rotate the alignment meter about an axis of the first shaft, and
wherein the alignment meter, when rotated with the center hub, is configured to measure an alignment of a second shaft with respect to the first shaft without rotation of the first shaft and the second shaft.

19. The shaft to shaft alignment tool of claim 18 , further including a spring disposed within each respective groove of the center hub between the center hub and the proximal end section of the respective adjustable arm, wherein the spring is configured to adjust a radial position of the respective adjustable arm by urging the respective adjustable arm radially outwardly.

Assignees

• Alexander Sean J
• Johnston Ronald K
• Solar Turbines Inc

Inventors

• Alexander Sean J
• Johnston Ronald K

Classifications

• F02C7/36

  Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user ({F02C3/107 - F02C3/13 and} F02C7/32 take precedence; couplings for transmitting rotation F16D; gearing in general F16H) · CPC title

• G01B5/25 Primary

  for testing the alignment of axes · CPC title