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Wind Turbine

A technology for wind turbines and fans, which is applied to wind turbine combinations, wind turbines, wind power generation, etc., can solve the problems of poor cooling effect of the outer ring of the bearing and difficulty in achieving controllable cooling.

Active Publication Date: 2020-10-23
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a wind power generating set in order to overcome the defects in the prior art that the cooling effect of the outer ring of the bearing is relatively poor and it is difficult to achieve controllable cooling.

Method used

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Embodiment 1

[0039] Such as figure 1 As shown, the present invention provides a wind power generating set, which includes a bearing system, a rotor 2, a hub 3 and a shroud 4, the bearing system includes a bearing outer ring 11 and a bearing inner ring 12, and the rotor 2 is connected to the rotating shaft of the bearing system. part, in this embodiment is the bearing outer ring 11 , and the hub 3 is connected to the bearing outer ring 11 . The outer side of the hub 3 is provided with a shroud 4 , so that a cavity is formed between the hub 3 and the shroud 4 . A part of the surfaces of the bearing outer ring 11, the rotor 2 and the hub 3 are exposed to the air in the cavity. Except for some necessary small gaps and openings, the cavity and the space inside the hub 3 are basically disconnected, thereby preventing untreated air from entering the nacelle and inside of the generator of the wind power generating set. In this embodiment, the hub cover can be used to further disconnect the cavit...

Embodiment 2

[0048] Such as figure 2 As shown, the structure of this embodiment is basically the same as that of Embodiment 1, the difference is that: the guide structure 62 is replaced by a cooling fan device 63, that is, a plurality of cooling fan devices 63 are located along the surface of the hub 3 close to the bearing outer ring 11 Evenly arranged and fixed in the circumferential direction, the outer ring 11 of the bearing is locally cooled. In other embodiments, a plurality of cooling fan devices 63 may also be evenly arranged and fixed circumferentially along the inner surface of the wind deflector 4 near the bearing outer ring 11 . The air outlet direction of the cooling fan device 63 is toward the bearing outer ring 11 , and the distance between the cooling fan device 63 and the bearing outer ring 11 is not greater than 30 cm. The cooling fan device 63 can be selected with a size and power less than that of the driving fan device 61 . These cooling fan devices 63 fixed near the...

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PUM

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Abstract

A wind power generator unit, comprising a bearing system, a rotor (2), a hub (3) and a flow guiding cover (4). The flow guiding cover (4) is located outside the hub (3), the bearing system comprises a bearing outer ring (11) and a bearing inner ring (12), and the rotor (2) and the hub (3) are connected to a rotating portion of the bearing system. The wind power generator unit further comprises a bearing cooling device, the bearing cooling device comprises several openings located on or near the flow guiding cover (4), and the space between the flow guiding cover (4) and the hub (3) is in communication with the outside by means of the openings. At least a portion of the bearing system is exposed to the space, and cooling air can flow into the space from the openings to cool the bearing system.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a wind power generating set. Background technique [0002] In recent years, the trend of large-scale wind turbines has become increasingly clear, and the increase in unit capacity has put forward higher requirements for the size, performance and reliability of generator bearings. A key part of bearing design is to solve the problem of heat dissipation during its operation. This is a more severe challenge for large-scale wind turbines, because the bearing becomes larger and the load it receives increases, which means that the heat generated by the bearing will further increase. In order to ensure that the bearing can operate normally within its design life, it is usually not only necessary to keep the operating temperature of the main components of the bearing within the limit, but also to control the temperature difference between the inner and outer rings of the bearing with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D9/25F03D80/60F03D80/70
CPCF03D9/25F03D80/60F03D80/70Y02E10/72
Inventor 吴立建闻汇施杨杨飞崔明方攸同
Owner ZHEJIANG UNIV