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Wind generating set

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

Active Publication Date: 2019-06-28
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 i

Method used

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  • Wind generating set
  • Wind generating set

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Example Embodiment

[0038] Example 1

[0039] Such as figure 1 As shown, the present invention provides a wind turbine generator 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 rotation of the bearing system. In part, in this embodiment, it is the bearing outer ring 11, and the hub 3 is connected to the bearing outer ring 11. An air deflector 4 is provided on the outer side of the hub 3 so that a cavity is formed between the hub 3 and the air deflector 4. Part of the surface of the bearing outer ring 11, the rotor 2 and the hub 3 is exposed to the air in the cavity. Except for some necessary small gaps and openings, the cavity and the space in the hub 3 are basically disconnected, thereby preventing untreated air from entering the nacelle of the wind turbine generator and the interior of the generator. In this embodiment, the hub cover can be used to realiz...

Example Embodiment

[0047] Example 2

[0048] Such as figure 2 As shown, the structure of this embodiment is basically the same as that of embodiment 1, and the difference is that the guide structure 62 is replaced with 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 outer bearing ring 11 The circumferential direction is evenly arranged and fixed, and 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 in the circumferential direction along the inner surface of the flow deflector 4 near the outer ring 11 of the bearing. The air outlet direction of the cooling fan device 63 faces the bearing outer ring 11, and the distance between the cooling fan device 63 and the bearing outer ring 11 is not more than 30 cm. The size and power of the cooling fan device 63 may be smaller than those of the driving fan device 61. These cool...

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Abstract

The invention provides a wind generating set. The wind generating set comprises a bearing system, a rotor, a hub and a flow guide cover; the flow guide cover is located outside the hub, the bearing system comprises a bearing outer ring and a bearing inner ring, the rotor and the hub are connected to the rotating part of the bearing system, the wind generating set further comprises a bearing cooling device, the bearing cooling device comprises openings formed in or nearby the flow guide cover, space between the flow guide cover and the hub communicates with the exterior through the openings, atleast one part of the bearing system is exposed in the space, and cooling air flows into the space to cool the bearing system through the openings. According to the wind generating set, the cooling device is arranged between the flow guide cover and the hub, the cooling effect of the bearing outer ring can be enhanced, the inner ring cooling system and the outer ring cooling system can independent and adjustable, the inner and outer ring temperature difference can be further controlled, the heat deforming degrees of all parts of the bearing are consistent, the bearing work condition is improved, the service life is prolonged, the structure is simple, and mounting is safe and convenient.

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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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