ARRANGEMENT FOR GUIDING AND/OR HOLDING ELECTRICALLY CONDUCTIVE SLIDING CONTACT ELEMENTS

• US 20180166844A1
• Filed: 04/15/2016
• Published: 06/14/2018
• Est. Priority Date: 05/29/2015
• Status: Active Grant

• Current Assignee: Flender GmbH (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: MAIER, JOSEF, BINDER, HERBERT, GRUBER, ROBERT, KROMPASS, MARTIN, MIMMINGER, OLIVER, SCHIFFERER, KLAUS
• Granted Patent: US 10,439,350 B2
• Time in Patent Office: Days
• CPC Class Codes: H01R 39/41 cartridge type
• CPC Class Codes: H01R 39/58 Means structurally associated with the current collector for indicating condition thereof, e.g. for indicating brush wear
• CPC Class Codes: H02K 13/003 Structural associations of slip-rings
• CPC Class Codes: H02K 9/28 Cooling of commutators, slip-rings or brushes e.g. by ventilating

Abstract

A contact-making rotary transmission includes a brush forming an electrically conductive sliding contact element and a contact path of electrically conductive material for contact with the brush. The brush is guided and/or held by an arrangement which includes a plurality of carrier segments arranged axially behind one another. Each carrier segment has attached thereto a brush receptacle such as to define a first gap between the carrier segment and the brush receptacle. The brush receptacle includes a stationary receiving shaft which is formed by walls and configured to receive the brush, and a guide element which is provided on a wall of the receiving shaft so as to define a second gap between the brush and the wall. At least one of the walls includes an opening in communication with the first and second gaps to allow a flow of cooling air for cooling the brush.

Claims

1-8. -8. (canceled)

9. A contact-making rotary transmission, comprising:

a brush forming an electrically conductive sliding contact element;

a contact path of electrically conductive material for contact with the brush; and

an arrangement for guiding and/or holding the brush, said arrangement including a plurality of carrier segments arranged axially behind one another, each said carrier segment having attached thereto a brush receptacle such as to define a first gap between the carrier segment and the brush receptacle, said brush receptacle comprising a stationary receiving shaft formed by walls and configured to receive the brush, and a guide element which is provided on a wall of the receiving shaft so as to define a second gap between the brush and the wall, at least one of the walls including an opening in communication with the first and second gaps to allow a flow of cooling air for cooling the brush.

10. The contact-making rotary transmission of claim 9, constructed in the form of a sliding ring unit for a wind power generator.

11. The contact-making rotary transmission of claim. 9, wherein the brush receptacle includes two of said guide element, said guide elements being embodied as strips arranged on two opposing corners of the receiving shaft, respectively.

12. The contact-making rotary transmission of claim 9, further comprising a wear monitoring unit configured to detect wear of the brush.

13. The contact-making rotary transmission of claim 9, further comprising a pressure element arranged on the receiving shaft to maintain adequate contact pressure between the brush and the contact path.

14. The contact-making rotary transmission of claim 9, wherein the second gap is continuous.

15. A dynamoelectric machine, comprising a contact-making rotary transmission, said contact-making rotary transmission comprising a brush forming an electrically conductive sliding contact element, a contact path of electrically conductive material for contact with the brush, and an arrangement for guiding and/or holding the brush, said arrangement including a plurality of carrier segments arranged axially behind one another, each said carrier segment having attached thereto a brush receptacle such as to define a first gap between the carrier segment and the brush receptacle, said brush receptacle comprising a stationary receiving shaft formed by walls and configured to receive the brush, and a guide element which is provided on a wall of the receiving shaft so as to define a second gap between the brush and the wall, at least one of the walls including an opening in communication with the first and second gaps to allow an axial and/or radial flow of cooling air for cooling the brush.

16. The dynamoelectric machine of claim 15, further comprising a rotor, said contact-making rotary transmission connecting axially to the rotor.

17. The dynamoelectric machine of claim 16, wherein the contact-making rotary transmission is arranged in coaxial relationship to the rotor.

18. The dynamoelectric machine of claim 15, wherein the contact-making rotary transmission is constructed in the form of a sliding ring unit for a wind power generator.

19. The dynamoelectric machine of claim 15, wherein the brush receptacle includes two of said guide element, said guide elements being embodied as strips arranged on two opposing corners of the receiving shaft, respectively.

20. The dynamoelectric machine of claim 15, wherein the contact-making rotary transmission includes a wear monitoring unit configured to detect wear of the brush.

21. The dynamoelectric machine of claim 15, wherein the contact-making rotary transmission includes a pressure element arranged on the receiving shaft to maintain adequate contact pressure between the brush and the contact path.