Grounding rope for a shaft grounding apparatus of a dynamo-electric machine

Patent metadata

Field	Value
Publication number	US-9560729-B2
Application number	US-201314020992-A
Country	US
Kind code	B2
Filing date	Sep 9, 2013
Priority date	Sep 9, 2013
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A grounding rope assembly for electrically grounding a rotatable conductive shaft of a dynamo-electric machine. The assembly includes a grounding rope member including a plurality of conductive wires extending along the length of the grounding rope member and one or more discrete fixation points intermediate the first and second ends of the grounding rope member. Two or more of the plurality of conductive wires are affixed together at each of the discrete fixation points.

First claim

What is claimed is:

1. An assembly for electrically grounding a rotatable conductive shaft of a dynamo-electric machine, the assembly comprising:
a rope member having a first end and a second end, and a length therebetween;
a rope guide configured to guide the rope member on an electrically conductive surface of a rotating shaft; and
wherein the rope member includes a plurality of conductive wires extending along the length, and wherein the rope member includes one or more discrete fixation points intermediate the first and second ends, and wherein two or more of the plurality of conductive wires are affixed together at each of the discrete fixation points.

2. The assembly of claim 1 , wherein two or more of the plurality of wires are affixed together by welding at the discrete fixation points.

3. The assembly of claim 1 , wherein two or more of the plurality of wires are affixed together by ultrasonic welding at the discrete fixation points.

4. The assembly of claim 1 , wherein two or more of the plurality of wires are affixed together by brazing at the discrete fixation points.

5. The assembly of claim 1 , wherein two or more of the plurality of wires are affixed together by crimping a band around the plurality of wires at the discrete fixation points.

6. The assembly of claim 5 , wherein the band is electrically conductive.

7. The assembly of claim 1 , wherein two or more of the plurality of wires are affixed together by solidifying an adhesive at the discrete fixation points.

8. The assembly of claim 1 , wherein the plurality of wires are helically wound along the length of the rope member.

9. The assembly of claim 1 , wherein the rope member includes at least one non-electrically conductive member arranged with the plurality of conductive wires.

10. The assembly of claim 9 , wherein the non-electrically conductive member cleans or lubricates the rope member.

11. The assembly of claim 1 , wherein at least one of the plurality of conductive members is an insulated conductive member having an insulation covering thereon such that the insulated conductive member is electrically insulated from the one or more other conductive members of the plurality of conductive members configured to be positioned in electrical contact with a rotating conductive surface of the dynamo-electric machine, and
wherein the insulation covering is configured to be worn away to permit electrical contact between the insulated conductive member and the rotating conductive surface to generate a notification signal indicative of a wear state of the rope member.

12. The assembly of claim 11 , wherein the insulated conductive member is located in a center of the rope member with the one or more other conductive members of the plurality of conductive members surrounding the insulated conductive member.

13. The assembly of claim 12 , wherein the one or more other conductive members of the plurality of conductive members are helically wrapped around the insulated conductive member.

14. The assembly of claim 11 , wherein the notification signal alerts personnel of the wear state of the rope member.

15. An assembly for electrically grounding a rotatable conductive shaft of a dynamo-electric machine, the assembly comprising:
a rope member having a first end and a second end, and a length therebetween;
a rope guide configured to guide the rope member on an electrically conductive surface of a rotating shaft;
wherein the rope member includes a plurality of conductive wires, each of the plurality of conductive wires including a first end positioned adjacent the first end of the rope member and a second end positioned adjacent the second end of the rope member such that each of the plurality of conductive wires extends continuously from the first end of the rope member to the second end of the rope member;
wherein the rope member includes one or more discrete fixation points intermediate the first and second ends; and
wherein two or more of the plurality of conductive wires are affixed together at each of the discrete fixation points.

16. The assembly of claim 15 , wherein two or more of the plurality of wires are affixed together by welding at the discrete fixation points.

17. The assembly of claim 15 , wherein two or more of the plurality of conductive wires are affixed together by crimping a band around the plurality of conductive wires at the discrete fixation points.

18. The assembly of claim 17 , wherein the band is electrically conductive.

19. The assembly of claim 15 , wherein the rope member includes at least one non-electrically conductive member arranged with the plurality of conductive wires.

20. An assembly for electrically grounding a rotatable conductive shaft of a dynamo-electric machine, the assembly comprising:
a rope member having a first end and a second end, and a length therebetween;
a rope guide configured to guide the rope member on an electrically conductive surface of a rotating shaft; and
wherein the rope member includes a plurality of conductive wires extending along the length of the rope member;
wherein the rope member includes a discrete fixation point intermediate the first and second ends;
wherein two or more of the plurality of conductive wires are affixed together at the discrete fixation point; and
wherein a first portion of each of the two or more of the plurality of conductive wires affixed together at the discrete fixation point extends away from the discrete fixation point toward the first end of the rope member, and a second portion of each of the two or more of the plurality of conductive wire affixed together at the discrete fixation point extends away from the discrete fixation point toward the second end of the rope member.

21. The assembly of claim 20 , wherein the two or more of the plurality of conductive wires are affixed together by welding at the discrete fixation point.

22. The assembly of claim 20 , wherein the two or more of the plurality of conductive wires are affixed together by crimping a band around the plurality of conductive wires at the discrete fixation point.

23. The assembly of claim 22 , wherein the band is electrically conductive.

24. The assembly of claim 20 , wherein the rope member includes at least one non-electrically conductive member arranged with the plurality of conductive wires.

Assignees

• Cutsforth Inc

Inventors

• Cutsforth Robert S
• Kammerer Jason R

Classifications

• H01R39/12

  using bearing or shaft surface as contact surface · CPC title

• H01R2201/10

  for dynamoelectric machines · CPC title

• H05F3/02 Primary

  by means of earthing connections · CPC title

• H02K11/40 Primary

  Structural association with grounding devices · CPC title

• H01R39/64 Primary

  Devices for uninterrupted current collection · CPC title