Method and apparatus for statically aligning shafts and monitoring shaft alignment

• US 4,518,855 A
• Filed: 09/30/1982
• Issued: 05/21/1985
• Est. Priority Date: 09/30/1982
• Status: Expired due to Term

• Current Assignee: Align-X, Inc., Spring - Mornne Incorporated
• Original Assignee: Spring - Mornne Incorporated
• Inventors: Malak, Stephen P.
• Primary Examiner(s): Nelms, David C.
• Assistant Examiner(s): Gatto, J.
• Application Number:
  US06/430,333
• Time in Patent Office: 964 Days
• Field of Search: 250/201, 250/203, 356/152, 356/399, 356/400
• US Class Current: 356/141.3
• CPC Class Codes: G01B 11/272 using photoelectric detection means

Abstract

A method and apparatus for statically aligning, checking or monitoring the alignment of a first shaft with a second shaft, one shaft being preferably chosen as a reference shaft to which the other shaft is aligned, the apparatus comprising a first mount means mounted on the first shaft and having mounted thereon a first dual-axis radiation sensing means and means for providing a first radiation beam, a second mount means mounted on the second shaft and having mounted thereon a second dual-axis radiation sensing means and means for providing a second radiation beam, the first radiation beam oriented to impinge upon the second dual-axis radiation sensing means to generate a second signal, the second radiation beam oriented to impinge upon the first dual-axis radiation sensing means to generate a first signal, and readout means having defined alignment conditions responsive to the first signal and the second signal for visually displaying shaft alignment, with alignment of the two shafts indicated by the first signal and the second signal coinciding with the defined alignment conditions.

Claims

1. A shaft alignment apparatus for statically aligning a first shaft with a second shaft, comprising:

a first dual-axis position sensing detector providing a first signal;

a second dual-axis position sensing detector providing a second signal;

first mount means for mounting the first dual-axis position sensing detector to the first shaft;

second mount means for mounting the second dual-axis position sensing detector to the second shaft;

a first alignment radiation source mounted on the first mount means and oriented to provide a first alignment radiation beam to the second dual-axis position sensing detector to generate the second signal;

a second alignment radiation source mounted on the second mount means and oriented to provide a second alignment radiation beam to the first dual-axis position sensing detector to generate the first signal; and

a readout means having defined alignment conditions and being responsive to the first signal and the second signal for visually displaying shaft alignment, whereby with adjustment of the first shaft with respect to the second shaft, alignment of the first shaft with the second shaft will be indicated on the readout means according to the defined alignment conditions.

2. A shaft aligning apparatus as recited in claim 1 wherein the first dual-axis position sensing detector is a first dual-axis position photodetector and the second dual-axis position sensing detector is a second dual-axis position photodetector.

3. A shaft alignment apparatus as recited in claim 2 wherein the first dual-axis position photodetector is a first electronic optical autocollimator, and the second dual-axis position photodetector is a second electronic optical autocollimator.

4. A shaft alignment apparatus as recited in claim 2 further including a first phase orientation means mounted on the first mount means and a second phase orientation means mounted on the second mount means.

5. A shaft alignment apparatus as recited in claim 4 wherein the first phase orientation means is a first spirit level and the second phase orientation means is a second spirit level.

6. A shaft alignment apparatus as recited in claim 2 wherein the first alignment radiation source is a first laser and the second alignment radiation source is a second laser.

7. A shaft alignment apparatus as recited in claim 2 wherein the first dual-axis position photodetector comprises a first single-axis position sensing photodetector and a third single-axis position sensing photodetector, and the second dual-axis position photodetector comprises a second single-axis position sensing photodetector and a fourth single-axis position sensing photodetector.

8. A shaft alignment apparatus as recited in claim 7 wherein the readout means is selectively responsive to the first single-axis position sensing photodetector, second single-axis position sensing photodetector, third single-axis position sensing photodetector and fourth single-axis position sensing photodetector.

9. A shaft alignment apparatus as recited in claim 8 wherein the first alignment radiation source comprises a first laser providing the first alignment radiation beam and a first radiation beam splitter means for intercepting the first alignment radiation beam and generating a first vertical alignment radiation beam oriented to intercept the second single-axis position sensing photodetector and a first horizontal alignment radiation beam oriented to intercept the fourth single-axis position sensing photodetector, and the second alignment radiation source comprises a second laser providing the second alignment radiation beam and a second radiation beam splitter means for intercepting the second alignment radiation beam and generating a second vertical alignment radiation beam oriented to intercept the first single-axis position sensing photodetector and a second horizontal alignment radiation beam oriented to intercept the third single-axis position sensing photodetector.

10. A shaft alignment apparatus as recited in claim 2 wherein the first dual-axis position photodetector comprises:

a first-front single-axis position sensing photodetector and a first rear single-axis position sensing photodetector, and a third front single-axis position sensing photodetector and a third rear single-axis position sensing photodetector,

and wherein the second dual-axis position photodetector comprises;

a second front single-axis position sensing photodetector and a second rear single-axis position sensing photodetector, and a fourth front single-axis position sensing photodetector and a fourth rear single-axis position sensing photodetector.

11. A shaft alignment apparatus for aligning a first shaft with a second shaft, comprising:

first mount means carrying a first dual-axis radiation sensing means, the first mount means mounted on the first shaft;

second mount means carrying a second dual-axis radiation sensing means, the second mount means mounted on the second shaft;

first radiation means for providing a first radiation beam, the first radiation means carried on the first mount means and oriented to project the first radiation beam to the second dual-axis radiation sensing means and generate a second signal;

a second radiation means for providing a second radiation beam, the second radiation means carried on the second mount means and oriented to project the second radiation beam to the first dual-axis radiation sensing means and generate a first signal; and

readout means having defined alignment conditions and being responsive to the first signal and the second signal for visually displaying shaft alignment, whereby with adjustment of the first shaft with respect to the second shaft, alignment of the first shaft with the second shaft will be indicated by the readout means when the first signal and the second signal coincide with the defined alignment conditions.

12. A shaft alignment apparatus as recited in claim 11 wherein the first dual-axis radiation sensing means is a first dual-axis photodetector and the second dual-axis radiation sensing means is a second dual-axis photodetector.

13. A shaft alignment apparatus as recited in claim 12 wherein the first dual-axis photodetector comprises a first single-axis position photodetector and a third single-axis position photodetector, and the second dual-axis photodetector comprises a second single-axis position photodetector and a fourth single-axis position photodetector.

14. A shaft alignment apparatus as recited in claim 13 wherein the first radiation means is a first laser and the second radiation means is a second laser.

15. A shaft alignment apparatus as recited in claim 14 further including first means for intercepting the first radiation beam and generating a first vertical alignment radiation beam oriented to impinge upon the second single-axis position photodetector and a first horizontal alignment radiation beam oriented to impinge upon the fourth single-axis position photodetector, and second means for intercepting the second radiation beam and generating a second vertical alignment radiation beam oriented to impinge upon the first single-axis position photodetector and a second horizontal alignment radiation beam oriented to impinge upon the third single-axis position photodetector.

16. A shaft alignment apparatus as recited in claim 12 wherein the first dual-axis photodetector comprises:

a first front single-axis position sensing photodetector and a first rear single-axis position sensing photodetector, and a third front single-axis position sensing photodetector and a third rear single-axis position sensing photodetector,

and wherein the second dual-axis photodetector comprises;

a second front single-axis position sensing photodetector and second rear single-axis position sensing photodetector, and a fourth front singl-axis position sensing photodetector and a fourth rear single-axis position sensing photodetector.

17. A shaft alignment apparatus as recited in claim 12 further including a first phase orientation means mounted on the first mount means and a second phase orientation means mounted on the second mount means.

18. Static shaft alignment apparatus, comprising:

a first dual-axis radiation sensing means mounted on a first mount means;

a second dual-axis radiation sensing means mounted on a second mount means;

a first radiation source carried on the first mount means and oriented to provide a first radiation beam to the second dual-axis radiation sensing means to generate a second signal;

a second radiation source carried on the second mount means and oriented to provide a second radiation beam to the first dual-axis radiation sensing means to generate a first signal; and

readout means having defined alignment conditions and being responsive to the first signal and second signal for visually displaying alignment.

19. Static shaft alignment apparatus as recited in claim 18 wherein the first dual-axis radiation sensing means is a first dual-axis position photodetector and the second dual-axis radiation sensing means is a second dual-axis position photodetector.

20. Static shaft alignment apparatus as recited in claim 19 wherein the first dual-axis position photodetector is a first dual-axis electronic optical autocollimator, and the second dual-axis position photodetector is a second dual-axis electronic optical autocollimator.

21. Static shaft alignment apparatus as recited in claim 19 further including a first phase orientation means mounted on the first mount means and a second phase orientation means mounted on the second mount means.

22. Static shaft alignment apparatus as recited in claim 19 wherein the first dual-axis position photodetector comprises a first single-axis position photodetector and a third single-axis position photodetector, and the second dual-axis position photodetector, comprises a second single-axis position photodetector and a fourth single-axis position photodetector.

23. Static shaft alignment apparatus as recited in claim 22 wherein the first radiation source is a first laser and the second radiation source is a second laser.

24. Static shaft alignment apparatus as recited in claim 23 further including a first radiation beam splitter means for intercepting the first radiation beam and generating a first vertical alignment radiation beam oriented to impinge upon the second single-axis position photodetector and a first horizontal alignment radiation beam oriented to impinge upon the fourth single-axis position photodetector, and a second radiation beam splitter means for intercepting the second radiation beam and generating a second vertical alignment radiation beam oriented to impinge upon the first single-axis position photodetector and a second horizontal alignment radiation beam oriented to impinge upon the third single-axis position photodetector.

25. Static shaft alignment apparatus as recited in claim 19 wherein the first dual-axis position photodetector comprises:

a first front single-axis position sensing photodetector and a first rear single-axis position sensing photodetector, and a third front single-axis position sensing photodetector and a third rear single-axis position sensing photodetector,

and wherein the second dual-axis position photodetector comprises;

a second front single-axis position sensing photodetector and a second rear single-axis position sensing photodetector, and a fourth front single-axis position sensing photodetector and a fourth rear single-axis position sensing photodetector.

26. A method of statically aligning a first shaft with a second shaft, wherein the first shaft has mounted thereon a first dual-axis radiation sensing means and a first radiation source providing a first radiation beam and the second shaft has mounted thereon a second dual-axis radiation sensing means and a second radiation source providing a second radiation beam, and readout means having defined alignment conditions, comprising the steps of:

orienting the first radiation beam to the second dual-axis radiation sensing means and generating a second signal representing the orientation of the first radiation beam;

orienting the second radiation beam to the first dual-axis radiation sensing means and generating a first signal representing the orientation of the second radiation beam;

sensing the first signal and second signal at the readout means and visually displaying the orientation of the first radiation beam and the second radiation beam; and

adjusting the first shaft with respect to the second shaft until the first signal and the second signal are replicating the defined alignment conditions on the readout means.

27. The invention according to claim 26 wherein the first radiation sensing means is a first dual-axis position sensing photodetector and the second radiation sensing means is a second dual-axis position sensing photodetector.

28. The invention according to claim 27 wherein the first dual-axis position sensing photodetector is a first dual-axis electronic optical autocollimator and the second dual-axis position sensing photodetector is a second dual-axis electronic optical autocollimator.

29. The invention according to claim 27 wherein the first dual-axis position sensing photodetector comprises a first single-axis position photodetector and a third single-axis position photodetector, and the second dual-axis position sensing photodetector comprises a second single-axis position photodetector and a fourth single-axis position photodetector.

30. The invention according to claim 29 wherein the first radiation source is a first laser and the second radiation source is a second laser, the further steps of:

providing a first radiation beam splitter means intercepting the first radiation beam and generating a first vertical alignment radiation beam directed to impinge upon the second single-axis position photodetector and a first horizontal alignment radiation beam directed to impinge upon the fourth single-axis position photodetector; and

providing a second radiation beam splitter means intercepting the second radiation beam and generating a second vertical alignment radiation beam directed to imping upon the first single-axis position photodetector and a second horizontal alignment radiation beam directed to impinge upon the third single-axis position photodetector.

31. The invention according to claim 27 further including the steps of:

providing a first phase orientation means for orienting the first dual-axis radiation sensing means and first radiation source on the first shaft; and

providing a second phase orientation means for orienting the second dual-axis radiation sensing means and second radiation source on the second shaft.

32. A method of statically aligning a first shaft with a second shaft, wherein the first shaft has mounted thereon a first dual-axis radiation sensing means and first radiation source providing a first radiation beam and the second shaft has mounted thereon a second dual-axis radiation sensing means and a second radiation source providing a second radiation beam, and readout means having defined alignment conditions, comprising the steps of:

sensing the position of the first radiation beam on the second dual-axis radiation sensing means and generating a second signal representing the position of the first radiation beam;

sensing the position of the second radiation beam on the first dual-axis radiation sensing means and generating a first signal representing the position of the second radiation beam; and

replicating the defined alignment conditions on the readout means by adjusting the first shaft with respect to the second shaft until the first signal and second signal coincide with the defined alignment conditions.

33. The invention according to claim 32 wherein the first radiation sensing means is a first dual-axis position sensing photodetector and the second radiation sensing means is a second dual-axis position sensing photodetector.

34. The invention according to claim 32 further including the steps of:

providing a first phase orientation means for orienting the first dual-axis position sensing photodetector and first radiation source on the first shaft and;

providing a second phase orientation means for orienting the second dual-axis position sensing photodetector and second radiation source of the second shaft.

35. The invention according to claim 34 wherein the first dual-axis position sensing photodetector a first single-axis position photodetector and a third position photodetector, and the second dual-axis position sensing photodetector comprises a second single-axis position photodetector and a fourth single-axis position photodetector.

36. The invention according to claim 35 wherein the first radiation source is a first laser and the second radiation source is a second laser, the further steps of:

positioning a first radiation beam splitter means intercepting the first radiation beam and directing a first vertical alignment radiation beam to impinge upon the second single-axis position photodetector and a first horizontal alignment radiation beam to impinge upon the fourth single-axis position photodetector; and

positioning a second radiation beam splitter means intercepting the second radiation beam and directing a second vertical alignment radiation beam to impinge upon the first single-axis position photodetector and a second horizontal alignment radiation beam to impinge upon the third single-axis position photodetector.

37. Apparatus for monitoring the alignment of a driving unit having a driving shaft and a driven unit having a driven shaft, the driving shaft and the driven shaft interconnected by a coupling, comprising:

a first support mounted on the driving unit, the first support carrying a first dual radiation sensing means;

a second support mounted on the driven unit, the second support carrying a second dual-axis radiation sensing means;

first means carried on the first support for providing a first alignment radiation beam oriented to impinge upon the second dual-axis radiation sensing means and a generate a second signal;

second means carried on the second support for providing a second alignment radiation beam oriented to impinge upon the first dual-axis radiation sensing means and generate a first signal; and

readout means having defined alignment conditions and being responsive to the first signal and the second signal for visually displaying the alignment of the driving shaft with respect to the driven shaft.

38. The invention according to claim 37 wherein the first dual-axis radiation sensing means is a first dual-axis position sensing photodetector and the second dual-axis radiation sensing means is a second dual-axis position sensing photodetector.

39. The invention according to claim 38 wherein the first dual-axis position sensing photodetector is a first dual-axis electronic optical autocollimator and the second dual-axis position sensing photodetector is a second dual-axis electronic optical autocollimator.

40. The invention according to claim 38 wherein the first dual-axis position sensing photodetector comprises a first single-axis position photodetector and a third single-axis position photodetector, and the second dual-axis position sensing photodetector comprises a second single-axis position photodetector and a fourth single-axis position photodetector.

41. The invention according to claim 40 further including first means for intercepting the first alignment radiation beam and generating a first vertical radiation beam directed to impinge upon the second single-axis position sensing photodetector and a first horizontal radiation beam directed to impinge upon the fourth single-axis position sensing photodetector, and second means for intercepting the second alignment radiation beam and generating a second vertical radiation beam directed to impinge upon the first single-axis position sensing photodetector and a second horizontal radiation beam directed to impinge upon the third single-axis position sensing photodetector.

42. The invention according to claim 37 further including first means for phase orienting the first support on the driving unit and second means for phase orienting the second support on the driven unit.

43. The invention according to claim 42 wherein the first means for orienting the first support is a first spirit level and the second means for orienting the second support is a second spirit level.

44. The invention according to claim 37 wherein the first means for providing a first alignment radiation beam is a first laser and the second means for providing a second alignment radiation beam is a second laser.

45. A method of monitoring operating changes in the alignment of a driving unit having a driving shaft and a driven unit having a driven shaft, the driving shaft and driven shaft interconnected by a coupling, wherein the driving unit has mounted thereon a first dual-axis radiation sensing means and means for providing a first alignment radiation beam, and the driven unit has mounted thereon a second dual-axis radiation sensing means and means for providing a second alignment radiation beam, and readout means having defined alignment conditions, comprising the steps of:

sensing the position of the first alignment radiation beam on the second dual-axis radiation sensing means and generating a second signal representing the position of the first alignment radiation beam;

sensing the position of the second alignment radiation beam on the first dual-axis radiation sensing means and generating a first signal representing the position of the second alignment radiation beam;

sending the first signal and the second signal to the readout means for visual display; and

calibrating the first and second signals to coincide with the defined alignment conditions, whereby the first and second signals will monitor operating changes in the alignment of the driving unit with respect to the driven unit as compared to the defined alignment conditions.