Arrangement for guiding and/or holding electrically conductive sliding contact elements

• US 10,439,350 B2
• Filed: 04/15/2016
• Issued: 10/08/2019
• 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, Memminger, Oliver, Schifferer, Klaus
• Primary Examiner(s): Andrews, Michael
• Application Number:
  US15/577,670
• Publication Number:
  US 20180166844A1
• Time in Patent Office: 1,271 Days
• Field of Search: 310227, 310239, 310242, 310228
• 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. A contact-making rotary transmission, comprising:

at least one brush forming an electrically conductive sliding contact element;

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

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

wherein the at least one brush receptacle is fastened to the carrier segment via tabs which are cast directly on the at least one brush receptacle.

2. The contact-making rotary transmission of claim 1, constructed in the form of a sliding ring unit for a wind power generator.

3. The contact-making rotary transmission of claim 1, wherein the at least one brush receptacle includes two guide elements, said guide elements being embodied as strips arranged on two opposing corners of the at least one stationary receiving shaft, respectively.

4. The contact-making rotary transmission of claim 1, further comprising a wear monitoring unit configured to detect wear of the at least one brush.

5. The contact-making rotary transmission of claim 1, further comprising a pressure element arranged on the at least one stationary receiving shaft to maintain adequate contact pressure between the at least one brush and the contact path.

6. The contact-making rotary transmission of claim 1, wherein the second gap is continuous.

7. A dynamoelectric machine, comprising a contact-making rotary transmission, said contact-making rotary transmission comprising at least one brush forming an electrically conductive sliding contact element, a contact path of electrically conductive material for contact with the at least one brush, and an arrangement for guiding and/or holding the at least one brush, said arrangement including a plurality of carrier segments arranged axially behind one another and distanced from one another in an axial direction by spacers, each said carrier segment having attached thereto at least one brush receptacle such as to define a first gap between the carrier segment and the at least one brush receptacle, said at least one brush receptacle comprising at least one stationary receiving shaft formed by walls and configured to receive the at least one brush, and at least one guide element which is provided on at least one of the walls of the at least one stationary receiving shaft so as to define a second gap between the at least one brush and the at least one wall, said walls comprising two opposite exterior walls each 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 at least one brush, wherein the at least one brush receptacle is fastened to the carrier segment via tabs which are cast directly on the at least one brush receptacle.

8. The dynamoelectric machine of claim 7, further comprising a rotor, said contact-making rotary transmission connecting axially to the rotor.

9. The dynamoelectric machine of claim 8, wherein the contact-making rotary transmission is arranged in coaxial relationship to the rotor.

10. The dynamoelectric machine of claim 7, wherein the contact-making rotary transmission is constructed in the form of a sliding ring unit for a wind power generator.

11. The dynamoelectric machine of claim 7, wherein the at least one brush receptacle includes two guide elements, said guide elements being embodied as strips arranged on two opposing corners of the at least one stationary receiving shaft, respectively.

12. The dynamoelectric machine of claim 7, wherein the contact-making rotary transmission includes a wear monitoring unit configured to detect wear of the at least one brush.

13. The dynamoelectric machine of claim 7, wherein the contact-making rotary transmission includes a pressure element arranged on the at least one stationary receiving shaft to maintain adequate contact pressure between the at least one brush and the contact path.