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Slip ring, slip ring unit, electric machine, and wind turbine

A technology of slip rings and facilities, which is applied in the field of slip ring units and slip rings, can solve problems such as high heat load, and achieve the effect of saving forced ventilation

Active Publication Date: 2021-03-19
FLENDER GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

resulting in high thermal loads

Method used

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  • Slip ring, slip ring unit, electric machine, and wind turbine
  • Slip ring, slip ring unit, electric machine, and wind turbine
  • Slip ring, slip ring unit, electric machine, and wind turbine

Examples

Experimental program
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Effect test

Embodiment Construction

[0077] figure 1 A schematic diagram of the slip ring unit 17 is shown. Slip ring unit 17 includes slip ring 1 , electrically conductive slip ring element 11 and static device 13 . The slip ring 1 is positioned on a shaft 3 and is rotatably supported by the shaft 3 . The slip ring 1 comprises a contact region 5 and an insulating region 9 . The contact region 5 has two contact surfaces 5 a on its circumference. The contact surfaces 5 a of the respective contact regions 5 are at least partially separated by recesses 7 . The recess 7 is here arranged in the middle of the respective busbar 5 . For the sake of clarity, the protrusions 8 of the corresponding recesses 7 are not shown.

[0078] In the drawings described below, reference sign z designates an axial direction, reference sign r designates a radial direction, and reference sign t designates a tangential direction.

[0079] In the embodiment shown here, the slip ring 1 comprises three contact regions 9 and four insulat...

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PUM

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Abstract

The invention relates to a slip ring (1), a slip ring unit (17), and an electric machine comprising such a slip ring (1). The slip ring (1) is used to transmit electric energy from a stationary unit (13) to a contact region (5) via an electrically conductive slip ring element (11). The contact region (5) has at least one recess (7) in a tangential direction (t). The recess (7) or insulating layers(9) arranged between the contact regions (5) have at least one protrusion (8), wherein the protrusions (8) produce an airflow (15) for cooling the contact region (5) and / or the slip ring element (11), in particular during a rotational movement of the slip ring (1). In order to improve the airflow (15), openings (10) are introduced into annular surfaces (12) which are formed by an increased radiusof the contact region (5) compared to the adjacently arranged insulating regions (9). The openings (10) are preferably used to transfer the airflow (15) into the respective recess (7). By virtue of the features of the invention, large quantities of electric energy can be transmitted with a compact design of the slip ring (1). The slip ring (1) is therefore suitable for use in a wind turbine in particular.

Description

technical field [0001] The invention relates to a slip ring and a slip ring unit. Furthermore, the invention relates to an electric machine and a wind power plant. Background technique [0002] Generators for wind power installations sometimes include a rotor and coils in a stator. The coils in the rotor are usually supplied with electrical energy via slip rings. [0003] When transmitting electrical power, slip rings are subjected to high current loads, especially in the megawatt range. This results in a high thermal load. [0004] In order to reduce the thermal load, the slip ring or the slip ring unit (slip ring with a static device adapted thereto) can be designed larger. But this is not likely especially in wind power installations. [0005] Document EP3322047A1 thus proposes a slip ring unit with fan insulation sections. [0006] Publication DE 2529519 A1 relates to an air-cooled slip ring consisting of a plurality of individual annular discs arranged at a distan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R39/08H02K9/28H01R39/64H02K13/00
CPCH02K9/28H02K13/003H01R39/08H01R39/64Y02E10/72H02K9/10
Inventor 赫伯特·宾德尔罗伯特·格鲁贝尔奥利弗·梅明杰
Owner FLENDER GMBH