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A generator rotor assembly

A technology for generator rotors and components, which is applied in the direction of electric components, engine components, wind power motor combinations, etc., can solve the problem of cooling generators, achieve the effect of improving cooling airflow, reducing cost and weight

Pending Publication Date: 2021-09-21
VESTAS WIND SYST AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, megawatt-scale generators within the confined space of the generator housing generate so much heat that current air cooling methods cannot cool the generator effectively

Method used

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  • A generator rotor assembly
  • A generator rotor assembly
  • A generator rotor assembly

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Embodiment Construction

[0037]Certain embodiments of the present invention will now be described, in which numerous features will be discussed in detail in order to provide a thorough understanding of the inventive concept defined in the claims. It will be apparent, however, to those skilled in the art that the present invention may be practiced without specific details and, in some instances, well known methods, methods, technology and structure.

[0038] In order to put embodiments of the invention into a proper context, first, reference will be made to figure 1 , figure 1 A typical horizontal axis wind turbine (HAWT) is illustrated in which a generator rotor assembly according to embodiments of the invention may be implemented. Although this particular image depicts an onshore wind turbine, it will be understood that equivalent features will also be found on offshore wind turbines. Also, although wind turbines are referred to as "horizontal shafts," those skilled in the art will appreciate that...

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Abstract

A generator rotor assembly (42) comprises a cylindrical ring structure (46) defining a central hollow portion and arranged to rotate around a rotational axis. The cylindrical ring structure (46) comprises a plurality of permanent magnet packages (48) arranged coaxially around the rotational axis, the permanent magnet packages (48) comprising a plurality of coaxially stacked ring-shaped segmented layers (80), a plurality of tie rod holes (86) and a plurality of tie rods (54). The coaxially stacked ring-shaped segmented layers (80) comprise a plurality of contiguous segment sheets (82) arranged around the rotational axis to form the ring-shaped layer, the stacked layers (80) being staggered such that segment breaks between two contiguous segment sheets (82) in one of the layers are angularly offset with respect to segment breaks between two contiguous segment sheets (82) in an adjacent layer. The tie rod holes (86) extend axially through the layers of the permanent magnet packages (48), wherein the plurality of tie rod holes (86) of adjacent permanent magnet packages (48) are complementary in size and position, such that a plurality of tie rod bores is defined. The tie rods (54) extend through respective ones of the plurality of tie rod bores.

Description

technical field [0001] The present invention relates to generator rotor assemblies. More specifically, the present invention relates to generator rotor assemblies for wind turbines. Background technique [0002] Wind turbines use large rotors with multiple rotor blades to convert the kinetic energy of the wind into electrical energy. A typical horizontal axis wind turbine (HAWT) includes a tower, a nacelle on top of the tower, a rotor hub mounted to the nacelle, and a plurality of wind turbine rotor blades coupled to the rotor hub. Depending on the direction of the wind, the nacelle and rotor blades are steered into the optimal direction by a yaw system for rotating the nacelle and a pitch system for rotating the blades. [0003] The nacelle houses many of the functional components of the wind turbine including, for example, the generator, gearbox, drive train and rotor braking assembly as well as converter equipment for converting mechanical energy at the rotor into elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K7/18H02K21/14
CPCH02K7/1838H02K21/14H02K2213/12H02K2213/09H02K1/2766Y02E10/72F03D9/25F05B2220/706
Inventor P·蒙高L·朗瓦特·克罗赫H·Z·曼尼克J·伯格曼
Owner VESTAS WIND SYST AS