Unequal interval symmetrical ventilating ducts for stators and rotors of air and water-cooled wind driven generator

Abstract

The invention discloses unequal interval symmetrical ventilating ducts for stators and rotors of an air and water-cooled wind driven generator. Iron cores of stators and iron cores of rotors are in a segmented press fitting structure, lengths of all segments of iron cores are symmetrically distributed in such a way that lengths are shortened gradually from end portions to middle portions, ventilating groove plates are arranged among adjacent iron cores to form ventilating ducts, widths of ventilating ducts for stators and rotors are consistent, and ventilating ducts are aligned after iron cores of stators and rotors are mounted in a pressing mode. The unequal interval symmetrical ventilating ducts have the advantages that the unequal interval symmetrical ventilating duct structure is adopted, so that the heat exchange capability of middle portions of iron cores, which is poor originally, is greatly improved, and the problems that original iron cores are uneven in temperature distribution in axis directions and the temperature of middle portions is too high are solved.

Description

technical field [0001] The invention relates to a large-power generator stator-rotor iron core ventilation structure, which belongs to the field of generator design, and in particular to an air-water-cooled wind-driven generator stator-rotor symmetrical ventilation channel with unequal spacing. Background technique [0002] Due to the relatively low power density of ordinary rotor wound motors, the length-to-diameter ratio of the iron core is less than 1, and the rotational speed is low, a traditional single-side centrifugal fan is used to form a hybrid cooling air path, and the air passages of the iron core are conventionally equidistant. It can meet the requirements of heat exchange, and high-power wind turbines have strict requirements on volume and weight, which makes the power density of the motor very high. High, wide range of variation, the traditional iron core ventilation channel design can not meet such requirements. Contents of the invention [0003] The purpos...

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Problems solved by technology

[0005] The feature of the present invention is: adopting the structure of unequal-spaced symmetrical air ducts, which greatly improves the heat transfer capacity of the middle part of the iron core, which is originally poor in effect, and solves the problem of uneven temperature distribution in the axial direction of the iron core and excessively high temperature in the middle part.

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