Transpiration-cooled wind driven generator stator

Abstract

An evaporative cooling wind power generator stator, the sealed space of the stator is composed of a stator shell [20], a non-magnetic stainless steel isolation sleeve [30], an end sealing end cover [40], and a pressure stop ring [50]; the stator core The liquid guide groove between the sections [10], the stator winding and the stator end winding [90], the stator evaporation space and the air condenser [80] form an evaporative cooling circuit; the air condenser [80] passes through the inlet pipe and the liquid return pipe It is connected with the stator housing [20] to form the main cooling circulation loop. The heat generated by the loss of the stator components is transferred to the evaporative cooling medium to increase its temperature. When the temperature reaches the saturation temperature corresponding to the internal pressure, the evaporative cooling medium in the container is vaporized, resulting in a phase change to absorb heat. After cooling by the air condenser Reliquefaction. The invention can make the temperature distribution of the stator iron core of the motor uniform, and the operating temperature is low, without local hot spots, safe and reliable, and the structure is simple and feasible, the size of the motor is small, and the power density is high.

Description

technical field [0001] The invention relates to an evaporation cooling wind generator stator. Background technique [0002] In the prior art, the stator core, the winding coils and the fixed parts of the wind generator are usually cooled by air or water, both of which have advantages and disadvantages. Because of its pervasiveness, the gas is more beneficial to the cooling of large-area scattered heat-generating parts, such as iron cores, but it is easy to form local overheating areas for concentrated heat-generating parts such as winding coils and end structural parts, thus affecting the insulation life and safe operation of the motor. Water cooling is the opposite of air cooling. For large-area scattered heat-generating components, it is difficult to arrange water cooling. [0003] Wind turbines are most commonly cooled by air. Air cooling is the use of air flow and its specific heat to take away the heat generated by the loss of various components. The advantages of ai...

AI Technical Summary

Problems solved by technology

The disadvantages are: due to the air medium and the structural arrangement of the cooling channel, the temperature distribution of the stator and rotor cores and windings of the air-cooled wind turbine is uneven, and there are hot spots in the heating parts, which may damage the winding insulation and reduce the service life of the winding insulation

The disadvantage is: the commonly used cooling structure of water-cooled wind turbines is to add a "water jacket" to the motor stator casing to achieve cooling purposes

However, this cooling structure cannot directly cool the heat-generating components like a large water-cooled generator. Therefore, the temperature distribution of the stator and rotor cores and windings of the generator is not uniform, and the ideal cooling effect cannot be completely achieved fundamentally.

Moreover, the most important thing is that most of the wind turbines are installed in the wild, and it is difficult to use water, which brings great difficulties to the operation of the generators.

[0005] With the development of wind power generation technology, the stand-alone capacity of wind power generators continues to increase, especially for megawatt wind power generators, which are required to have relatively small volume, high power density, light weight, safe and reliable operation, etc. The above two cooling methods and structures are difficult to meet these requirements

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